今天给各位同学分享七下人教版U1周测卷的知识,其中也会对七年级英语周测试卷进行解释,如果能碰巧解决你现在面临的问题,别忘了分享本站,现在开始吧!
本文目录一览:
- 1、人教版七年级地理下册期末检测卷及答案
- 2、跪求人教版语文七年级下册同步训练第五单元试卷答案
- 3、人教版七年级数学下册期末测试题及答案
- 4、人教版七年级英语期末试卷及答案
- 5、七年级下册英语第一单元练习题
- 6、七年级下册数学试卷及答案
人教版七年级地理下册期末检测卷及答案
七年级地理 期末考试近了,不到最后时刻,永远不要放弃;以下是我为大家整理的人教版七年级地理下册期末检测卷,希望你们喜欢。
人教版七年级地理下册期末检测题
卷Ⅰ(选择题,共15分)
一、选择题(本大题共15个小题;每小题1分,共15分.在每小题给出的四个选项中,只有一项是符合题目要求的,请把正确选项前的字母填在下表对应的空格内。)
题号 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
答案
下图为亚洲大陆沿北纬30度地形剖面图,据此回答1~2题
1、此图反映的地势特征是
A、中部高四周低 B、西高东低 C、东西高中间低 D、东高西低
2、关于甲地区的叙述,正确的是
A、气候为温带大陆性气候 B、多条大河的发源地
C、位于板块内部地壳稳 定 D、农业以 种植 业为主
2014年2月8日,我国南极泰山站正式建成,成为继长城站、中山站和昆仑站之后,我国在南极建成的第四个科考站。读“南极地区图”,回答3~5题。
3、下面四条经线中,我国有三个科考站特别靠近
A、75°E B、75°W C、105°E D、60°W
4、从南极上空观察,地球自转方向是
A、 B、 C、 D、
5、若从昆仑站沿图中直线去长城站,其前进的方向是
A、东南向西北 B、先向东南,后向东北
C、先向西南,后向西北 D、先向西南,后向东北
2015年4月25日14时11分,尼泊尔(北纬28.2度,东经84.7度)发生8.1级地
震。尼泊尔是南亚山区内陆国家,位于喜马拉雅山脉南麓。读图,完成6~9题
6、此次地震发生的主要原因是
A、亚欧板块和印度洋板块不断张裂 B、非洲板块和印度洋板块不断张裂
C、印度洋板块不断挤压亚欧板块 D、非洲板块不断挤压印 度洋板块
7、尼泊尔被誉为“佛祖之城”。源于该地的宗教是
A、____ B、犹太教 C、伊斯兰教 D、佛教
8、地震发生时,有不少登山队员正在攀登珠穆朗玛峰。他们可能 遇到的次生灾害不包括
A、泥石流 B、雪崩 C、滑坡 D、旱灾
9、发生地震时,如没有条件迅速撤离到室外时,下列做法正确的是
①选择合适避震空间,可以头顶棉被蹲在室内房屋的三角空间中
②如被埋压在废墟下,尽量挪开头部、胸部的杂物,扩大和稳定生存空间
③如果被埋压废墟下,尽量保存体力,敲击能发出声音的物体,向外发出呼救信号
④如果被埋在废墟下的时间比较长,要想办法维持自己的生命
A、①②③④ B、①③④ C、①②③ D、②③④
第31届夏季奥林匹克运动会,将于2016年8月份在巴西的里约热内卢举办。阅读巴西
地形图回答10~11题。
10、下列对于巴西位置的叙述,错误的是
A、大部分位于热带,另一部分地区位于温带
B、位于西半球和南半球
C、东临大西洋
D、西临太平洋
11、下列对于巴西自然资源利用的说法,合理的是
A、 在亚马孙平原大肆砍伐热带雨林改种橡胶或农作物
B、 将人口从稠密区全部迁移到巴西高原内部的稀疏区
C、 由于咖啡价格高,应把甘蔗和香蕉种植区改种咖啡
D、利用丰富的铁矿发展铁矿开采、钢铁、机械等工业
读 “北欧土地类型分布图”,回答12~13题
12、 北欧地区
A、森林广布 B、耕地稀少
C、多沙漠戈壁 D、无可垦荒地
13、去北欧地区旅游,下列景观能欣赏到的是
A、阳光海岸,沙滩椰林
B、幽深的峡湾,午夜的太阳
C、阿尔卑斯山 的湖光山色
D、塞纳河畔高耸的埃菲尔铁塔
读南美洲气候类型分布图,完成14~15题。
14、图示数字代表的气候类型中,年降水量最丰富的是
A、① B、② C、③ D、④
15、南美洲西海岸的气候类型呈南北狭长状分布,下列
因素中可能对其产生重要影响的是
A、纬度位置 B、西临太平洋
C、海岸线平直 D、地形
卷II(综合题,共15分)
二、 综合题(共15分)
得分 评卷人
16、读德国相关图文材料,回答下列问题(8分)
发展乳畜业需要大量的多汁牧草(生长过程喜湿喜温)。经济高度发达的德国位于欧洲中部,北部濒临北海、波罗的海。该 国乳畜业十分发达,乳畜产品大量出口。
(1)按纬度划分,德国位于 半球。
(2)除分层设色图外,还可通过 来判断德国地势具有 的
特征。
(3 )图中四个城市中,最可能成为啤酒工业中心的是 。以小麦、甜
菜为主的种植业基本分布在德国的 (填海拔范围)之间区域。
(4)请简要分析德国北部地区发展乳畜业的有利条件。(提示:从气候、位置、地形、河流、市场等方面分析)(只需选择三方面进行分析,3分)
。
得分 评卷人
17、读资料和图回答下列问题(7分)
资料1:2013年9月和10月,中国在出访中亚和东 南亚国家期间,先后提出共建“丝绸之路经济带”和“21世纪海上丝绸之路”(以下简称“一带一路”)的重大倡议,得到国际社会高度关注。
资料2:“一带 一路”示意图。
(1 )“一带一路”战略涵盖亚洲、非洲和 洲三大洲。
(2)“海上丝绸之路”上的海上交通要道有被日本称为“海上生命线”的 海峡。
(3)“海上丝绸之路”沿线国家和地区,资源丰富,货运繁忙,其中从波斯湾地区运出的货物比重最大的是 ,这种货物从波斯湾地区运往东亚的主要运输方式是 运输。
(4)沿“丝绸之路”自东向 西直至西欧,年降水量的变化规律是先逐渐 (增加、减少),再逐渐 (增加、减少),形成这种变化规律的主要原因是
A.纬度位置 B.海陆位置 C.地形因素 D.人为因素
人教版七年级地理下册期末检测卷参考答案
一、选择题(每小题1分,共15分.)
题号 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
答案 A B A B C C D D A D D A B A D
二、综合题(每空1分,共15分)
16、(8分)
(1)北(1分)
(2)河流(流向)(1分) 南高北低(1分)
(3)④(1分) 200米~1000米(1分)
(4)气候:全年温和湿润(1分);位置:位于北部沿海,海运便利
(1分);地形:平原(平坦)(1分);河流:河流众多,水源充足
(1分)(任意对1点即可得1分,最多得3分)
17、(分)
(1)欧(1分)
(2)马六甲(1分)
(3)石油(1分),海洋(水路)(1分)
(4)减少(1分),增加(1分),B(1分)
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七年级下册语文人教版同步训练第一单元试卷
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人教版语文七年级下册1单元试卷
一、基础知识及其运用(34分)
1.不借助字词典,给下列加点字注音。(5分)
菜畦 桑葚 脑髓 蝉蜕 讪笑
掸子 骊歌 花圃 嫉妒 木屐
2.找出下列词语中的五个错别字并改正。(2分)
人生鼎沸 行散神不散 和霭可亲 万念具焚 兴高彩烈
错别字:
改正:
3.从上下文连贯的角度看,连线最恰当的一项是( )。(2分)
在我的梦里:所有被砍伐的森林重新绿叶葱茏, 。梦境如此美好,能忍心让它仅仅是个梦吗?
A.受污染的所有河流重新清波荡漾 B.所有受污染的河流重新清波荡漾
C.所有河流不再受污染而清波荡漾 D.所有清波荡漾的河流不再受污染
4.对本单元课文的解说有误的一项是( )。(2分)
A.《从百草园到三味书屋》通过对百草园和三味书屋两种不同生活的描写和感受,含蓄而深刻地批判了腐朽的封建教育制度对儿童身心发展的束缚。
B.《爸爸的花儿落了》一文将现实与往事交替著写,将爸爸爱花和“我”的礼两线交替著写,突出了爸爸既严厉又充满关爱的性格。
C.《丑小鸭》中的“丑小鸭”处处受排挤,受嘲笑,受打击,但他并没有绝望,也没有沉沦,而是始终不屈地奋斗,终于变成了一只美丽、高贵的天鹅。
D.《伤仲永》一文意在说明,一个人能否成才,与天资毫无关系,完全取决于后天所受的教育以及自身的学习。
5.选出对《从百草园到三味书屋》中插叙美女蛇故事的作用分析正确的一项( )。(2分)
A.映衬百草园神话般的色彩,丰富了百草园作为儿童乐园的情趣。
B.长妈妈的迷信故事意在吓唬孩子,鲁迅是在批判长妈妈的迷信思想。
C.寄托善良制服邪恶的愿望,表现了劳动人民的智慧和力量。
D.故事纯属虚构,用以告诫人们:世界上不存在有尽善尽美的事物。
6.下列句中有通假字的一项是( )。(1分)
A.王子曰:仲永之通悟,受之天也 B.日扳仲永环谒于邑人
C.泯然众人矣 D.余闻之也久
7.说说下面这句话的意思,并仿照这个句子按提示再写一个句子。(2分)
只要你是一只天鹅蛋,就算是生在养鸭场里也没有什么关系。
只要你是 ,就算 也没有什么关系。
8.理解句子或词语的含义,回答问题。(6分)
(1) 连那最末次的相见也已经隔了七八年,其中似乎确凿只有一些野草;但那时却是我的乐园。为什么说百草园是“我”的乐园?这句话在文中起什么作用?
(2) 走过院子,看那垂落的夹竹桃,我默念著:爸爸的花儿落。我已不再是小孩子了。 “爸爸的花儿落了”的含义是什么?
(3)又七年,还自扬州,复到舅家问焉。日:“泯然众人矣。”方仲永“泯然众人”的原因是什么?(用课文原话回答)
9.作家作品填空。(12分)
(1)《从百草园到三味书屋》选自《 》,作者 ,原名 ,浙江绍兴人。是我国现代伟大的 家、 家、 家。
(2)《假如生活欺骗了你》的作者是 ,俄国伟大的诗人。著名诗作有《 》、《 》等,他的创作对俄国 和 的发展影响很大。
(3)《伤仲永》的作者是 代的 ,字 ,号 ,是杰出的 、 家,是“ ”之一。
二、阅读理解(36分)
(一)
冬天的百草园比较的无味;雪一下,可就两样了。拍雪人(将自己的全形印在雪上)和塑雪罗汉需要人们鉴赏,这是荒园,人迹罕至,所以不相宜,只好来捕鸟。薄薄的雪,是不行的;总须积雪盖了地面一两天,鸟雀们久已无处觅食的时候才好。扫开一块雪,露出地面,用一枝短棒支起一面大的竹筛来,下面撒些秕谷,棒上系一条长绳,人远远的牵着,看鸟雀下来啄食,走到竹筛底下的时候,将绳子一拉,便罩住了。但所得的是麻雀居多,也有白颊的“张飞鸟”,性子很躁,养不过夜的。
1.用原文回答。(2分)
捕鸟的条件:
捕鸟的结果:
2.捕鸟的过程用了一系列动词,它们的作用是什么?(2分)
3.“冬天的百草园比较的无味”是与什么相比较说的?(2分)
4.冬天百草园的乐趣是什么?(2分)
5.仿照画线句子写一段话。(2分)
(二)
金溪民方仲永,世隶耕。仲永生五年,未尝识书具,忽啼求之。父异焉,借旁近与之,即书诗四句,并自为其名。其诗以养父母、收族为意,传一乡秀才观之。自是指物作诗立就,其文理皆有可观者。邑人奇之,稍稍宾客其父,或以钱币乞之。父利其然也,日扳仲永环谒于邑人,不使学。
余闻之也久。明道中,从先人还家,于舅家见之,十二三矣。令作诗,不能称前时之闻。又七年,还自扬州,复到舅家问焉。日:“泯然众人矣。”
1.解释下列句子中的加点词语。(5分)
(1)父异焉,借旁近与之
(2)即书诗四句,并自为其名
(3)邑人奇之,稍稍宾客其父
(4)明道中,从先人还家
(5)不能称前时之闻
2.翻译下列句子。(2分)
(1) 自是指物作诗立就,其文理皆有可观者。
(2) 泯然众人矣。
3.画出下列句子的朗读节奏。(2分)
(1)借旁近与之,即书诗四句,并自为其名。
(2)其诗以养父母、收族为意。
(3)父利其然也,日扳仲永环谒于邑人,不使学。
4.联络上下文回答:方仲永的变化经历了哪几个阶段?(2分)
5.事实上,方仲永如同常人的原因有很多,其一,从乡邻的角度来看,“ ”;其二,从其父的角度来看,“ ”;其三,从方仲永本身来看, 。(引号内填原文)(3分)
6.从方仲永的遭遇来看,你得到了什么启发?(2分)
(三)
啊,朋友
朋友啊朋友, 朋友啊朋友,
你可千万不要忧愁。 你千万不要说忧愁。
你常说生活是沙漠, 你常说地上只有阴影,
那是因为你的心中没有绿洲。 那是因为你总是低着头走。
快先去做一个绿色的梦吧, 快昂起头吧迎著太阳走,
然后才会有那金色的秋! 将那阴影永远地抛在你的身后!
1. 这首诗告诉人们怎样的一个道理?(2分)
2. 这首诗读起来很亲切,也很上口,这是为什么?(2分)
3.补写诗句。(4分)
朋友啊朋友,
你千万不要忧愁。
你常说学习如受刑,
。
,
!
3. 请送一句恰当的人生格言给这位“朋友”。(别人写的或自己写的都可以)(2分)
三、作文(30分)
以“ 引起的回忆”为题,写一篇600字左右的文章。写在自备的稿纸上。
提示:从题目上看,这是一篇回忆性的以记叙为主的文章,可选取“玩具…‘相簿”等物品作为文章的线索,由此引起对往事的回忆。
要求:1.将题目补充完整。
2.用倒叙的写法引起下文。
3.恰当穿插议论、抒情。
4.书写要工整,标点要正确。
七年级下册人教版第四单元语文测试卷答案
参考答案:
1. fú jiá jī kàng 恬 皎 惬 弥 (每空0.5分)
2. ①尽态极妍,②叱吒风云,③叹为观止 (每小题1分)
3.A(选对即得3分)
4.跳跃在湖面上的一抹斜阳,“人生自古谁无死,留取丹心照汗青”的豪迈。(每一处2分,符合要求即可)
5.示例:鲁迅、文学家、思想家、革命家;《呐喊》《彷徨》《朝花夕拾》;鲁迅先生是一位了不起的作家,他的问品与人品都值得后人敬仰、学习!(前两处每一处1分,第三处2分)
6.《西游记》,大闹天宫(每一处1分,填本书中的其他情节也可)
7.(1)示例:清明、端午、中秋被增设为国家法定节假日;(2)示例:清明时节雨纷纷,路上行人欲断魂。(每一小题2分)
8.月下归航。(抓住“归航”二字,可以得2分)
9.衬托出“我”恋恋不舍的心情。(突出“衬托”、“恋恋不舍”就可得3分)
10.动作、语言;淳厚、朴实。(每一问2分)
11.不能(1分);因为原句运用了比喻的手法,一方面形象地写出了船速之快,另一方面烘托了心情之愉快。(3分)
12.开放性试题,言之有理、言之有即可。(3分)
13.(1)演出地点(1分)(2)表演方式(1分)(3)演员构成(1分)
14.不能;(1分)因为“攒拥”一词描写出观众之多,气氛之热烈,而“晃动”一词则没有这种表达效果。(2分)
15.侧面描写(2分);衬托出秦腔的夺人心魄的魅力。(2分)
16.“凡是到这些村庄去下乡……甚至不能有一点不入神的表示。”(2分)
17.开放性试题,写出剧种1分,写出感受3分。
18.(1)正好遇到,恰逢(2)只(3)全部(4)极点(每空1分)
19.(1)四处宾客都安静下来,没有人敢喧闹。(2分)(2)只听到远远的深巷里一阵狗叫声,就有一个妇人被惊醒,打着哈欠,伸著懒腰。(2分)
20. 交待了口技表演者,演出的时间、地点、设施、道具及听众情况和开演气氛。(2分)为下文记叙精彩表演作了渲染和铺垫。(1分)
21. 由远及近,由外到内,由小到大,由少及多。(2分)
22. 听得入神,心领神会,满意、折服的感受。(2分)
祝你工作愉快!
人教版七年级下册语文第五单元测试卷(AB)答案
我才六年级啊
人教版语文七年级上册基础训练试卷答案
1111111
七年级下册unit2英语同步训练答案 人教版
一。我们是一课一练
is Are is is is am are Are
二。
where is
Are there any kind
there isn't
near here
三。
in the neighborhood
across front of
next to
beeen and
人教版语文同步训练七年级上册21课答案
这个其实不难的。.再说..我们老师都不批的呵~~~~
鲁迅先生的文章确实很难懂..但这个还好理解的...
人教版语文七年级下册第五单元知识点
初中语文七年级下册单元记忆理解考点复习
(第五单元)
一、作家作品
1.《伟大的悲剧》作者茨威格,奥地利作家。
2.《在沙漠中心》作者圣埃克絮佩里,法国作家。
3.《登上地球之巅》作者郭超人,中国著名新闻工作者。
4.《真正的英雄》作者里根,连续两届任美国总统。
5.《夸父逐日》选自《山海经》,《山海经》共18篇,作者不详,内容主要为民间传说中的地理知识。对研究古代历史、地理、交通、民俗等,均有参考价值。
6.《共工怒触不周山》选自《淮南子》。《淮南子》又名《淮南鸿烈》,是西汉淮南王刘安及其门客集体撰写的一部著作。
二、字音字形
1.正音字
拽(zhuài)拉 毛骨悚(sǒng)然 怏怏(yàng)不乐 毋(wú)宁 吞噬(shì)
羸(léi)弱 告罄(qìng) 虞(yú) 斫(zhuó)痕 泅(qiú)水
砭(biān)骨 崔(cuī)巍(wēi) 阴霾(mái) 步履(lǚ) 遗孀(shuānɡ)
哀悼(dào) 疆(jiānɡ)域(yù) 颛(zhuān)顼(xū) 脐(qí)带 真谛(dì)
芸(yún)芸众生 膝(xī)盖 滞(zhì)留 窒(zhì)息 锤(chuí)炼
孜(zī)孜不倦 弥(mí)补
2.形近字
罄(告罄) 嚷(叫嚷) 沮(沮丧) 珊(珊瑚) 拽(拖拽)
磬(击磬) 镶(镶嵌) 殂(崩殂) 姗(姗姗来迟) 曳(摇曳)
3.多音字
校:学校(xiào);校(jiào)对 削:剥(bō)削(xuē);削(xiāo)铅笔
提:提(dī)防;孩提(tí) 伺:伺(sì)机;伺(cì)候
三、词语积累
重点词语:
毛骨悚然:形容十分恐惧。悚然,恐惧的样子。
怏怏不乐:形容不满意或不高兴的样子。
毋宁:不如。
吞噬:吞食。
语无伦次:话讲得很乱,没有条理。
羸弱:瘦弱。
告罄:指财物用完。
斫:砍,削。
知足安命:满足于已经得到的,认为现在的状况很好。
不毛之地:一长庄稼的地方,泛指贫瘠、荒凉的土地或地带。毛,草,苗。
不可思议:不可想象,不能理解。
聊以 *** :姑且用来安慰自己。
砭骨:刺入骨髓,形容使人感觉非常冷或疼痛非常剧烈。
崔巍:形容山高大雄伟。
异口同声:形容很多人说同样的话。
阴霾:空气中因浮悬著大量的烟、尘等微粒而形成的浑浊现象。文中指一种压抑的沉闷的气氛。
锲而不舍:比喻有恒心有毅力。
梦寐以求:睡梦中都想寻找,形容迫切希望着。
孜孜不倦:非常勤勉,不知疲倦。
迫不及待:急迫得不能再等待。
姗姗来迟:慢腾腾的来晚了。
忧心忡忡:心事重重,忧虑不安。
踉踉跄跄:走路不稳,跌跌撞撞。
海市蜃楼:比喻虚无缥缈的事物。
卷土重来:比喻失败后重新组织力量再干。
芸芸众生:佛教指世间一切生灵,后指众多的普通百姓。
死得其所:死在值得死的地方。
养精蓄锐:保养精神,积蓄力量。
斩钉截铁:比喻言行坚决果断,毫不含糊。
刚毅不屈:刚强坚毅,不屈服。
(《夸父逐日》《共工怒触不周山》文下的注释及课文的翻译)
四、名句精华
1.一个人虽然在同不可战胜的厄运的搏斗中毁灭了自己,但他的心灵却因此变得无比高尚。(茨威格《伟大的悲剧》)
2.灰心产生失望,失望产生动摇,动摇产生失败。(培根)
3.背诵《夸父逐日》《共工怒触不周山》全文。
每一课的中心句的理解,加上整篇的思想感情
[img]人教版七年级数学下册期末测试题及答案
距离数学期末考试还有不到一个月的时间了,七年级学生们在这段时间内突击做一些试题是非常有帮助的。我整理了关于人教版 七年级数学 下册期末测试题,希望对大家有帮助!
人教版七年级数学下册期末试题
一、选择题(本大题共10小题,每小题4分,共40分.在每小题给出的四个选项中,只有一项是符合题目要求的)
1.下列式子中,是一元一次方程的是( ).
A. B. C. D.
2.下列交通标志中,是轴对称图形的是( ).
3.下列现象中,不属于旋转的是( ).
A.汽车在笔直的公路上行驶 B.大风车的转动
C.电风扇叶片的转动 D.时针的转动
4.若 ,则下列不等式中不正确的是( ).
A. B. C. D.
5.解方程 ,去分母后,结果正确的是( ).
A. B.
C. D.
6.已知:关于 的一元一次方程 的解是 ,则 的值为( ).
A. B.5 C. D.
7.下列长度的各组线段能组成一个三角形的是( ).
A.3 ,5 ,8 B.1 ,2 ,3
C.4 ,5 ,10 D.3 ,4 ,5
8.下列各组中,不是二元一次方程 的解的是( ).
A. B. C. D.
9.下列正多边形的组合中,能够铺满地面的是( ).
A.正三角形和正五边形 B.正方形和正六边形
C.正三角形和正六边形 D.正五边形和正八边形
10.如果不等式组 的整数解共有3个,则 的取值范围是( ).
A. B.
C. D.
二、填空题(本大题共6小题,每小题4分,共24分)
11.当 时,代数式 与代数式 的值相等.
12.已知方程 ,如果用含 的代数式表示 ,则 .
13.二元一次方程组 的解是 .
14. 的3倍与5的和大于8,用不等式表示为 .
15.一个多边形的内角和是它的外角和的2倍,则这个多边形是 边形.
16.如图,将直角 沿BC方向平移得到
直角 ,其中 , ,
,则阴影部分的面积是 .
三、解答题(本大题共10小题,共86分.解答应写出文字说明,证明过程或演算步骤)
17.(6分)解方程: 18.(6分)解方程组:
19.(6分)解不等式组 ,并把它的解集在数轴表示出来.
20.(6分)在一次美化校园活动中,七年级(1)班分成两个小组,第一组21人打扫操场,第二组18人擦玻璃,后来根据工作需要,要使第一组人数是第二组人数的2倍,问应从第二组调多少人到第一组?
21.(8分)目前节能灯在城市已基本普及,今年某省面向农村地区推广,为响应号召,某商场用3300元购进节能灯100只,这两种节能灯的进价、售价如下表:
进价(元/只) 售价(元/只)
甲种节能灯 30 40
乙种节能灯 35 50
(1)求甲、乙两种节能灯各进多少只?
(2)全部售完100只节能灯后,该商场获利多少元?
22.(8分)如图,在五边形 中, , , , 平分 , 平分 ,求 的度数.
23.(10分)如图, 的顶点都在方格纸的格点上.
(1)画出 关于直线 的对称图形 ;
(2)画出 关于点 的中心对称图形 ;
(3)画出 绕点 逆时针旋转 后的图形△
24.(10分)如图,已知 ≌ ,点 在 上, 与 相交于点 ,
(1)当 , 时,线段 的长为 ;
(2)已知 , ,
①求 的度数;
②求 的度数.
25.(12分)为庆祝泉州文庙春晚,某市直学校组织学生制作并选送40盏花灯,共包括传统花灯、创意花灯和现代花灯三大种.已知每盏传统花灯需要25元材料费,每盏创意花灯需要23元材料费,每盏现代花灯需要20元材料费.
(1)如果该校选送10盏现代花灯,且总材料费不得超过895元,请问该校选送传统花灯、创意花灯各几盏?
(2)当三种花灯材料总费用为835元时,求选送传统花灯、创意花灯、现代花各几盏?
26.(14分)你可以直接利用结论“有一个角是 的等腰三角形是等边三角形”解决下列问题:
在 中, .
(1)如图1,已知 ,则 共有 条对称轴, °, °;
(2)如图2,已知 ,点 是 内部一点,连结 、 ,将 绕点 逆时针方向旋转,使边 与 重合,旋转后得到 ,连结 ,当 时,求 的长度.
(3)如图3,在 中,已知 ,点 是 内部一点, ,点 、 分别在边 、 上, 的周长的大小将随着 、 位置的变化而变化,请你画出点 、 ,使 的周长最小,要写出画图 方法 ,并直接写出周长的最小值.
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南安市2015—2016学年度下学期期末教学质量监测
初一数学试题参考答案及评分标准
说明:
(一)考生的正确解法与“参考答案”不同时,可参照“参考答案及评分标准”的精神进行评分.
(二)如解答的某一步出现错误,这一步没有改变后续部分的考查目的,可酌情给分,但原则上不超过后面应得的分数的二分之一;如属严重的概念性错误,就不给分.
(三)以下解答各行右端所注分数表示正确作完该步应得的累计分数.
(四)评分最小单位是1分,得分或扣分都不出现小数.
人教版七年级数学下册期末测试题参考答案
一、选择题(每小题4分,共40分).
1.A; 2.B; 3.A; 4.C; 5.B; 6.D; 7.D; 8.C; 9.C; 10.B.
二、填空题(每小题4分,共24分).
11、2; 12、 ; 13、 ; 14、 ; 15、六; 16、60.
三、解答题(10题,共86分).
17.(6分)解: ………………………………………………………2分
…………………………………………………………3分
…………………………………………………………4分
…………………………………………………………………5分
…………………………………………………………………6分
18.(6分)解: (如用代入法解,可参照本评分标准)
①×2,得 ③ …………………………………………1分
②+③,得 …………………………………………………2分
即 ………………………………………………………3分
将 代入①,得: ……………………………………4分
解得 ………………………………………………………5分
∴ . ……………………………………………………………6分
19.(6分)解:
解不等式①,得 ;………………………………………………2分
解不等式②,得 ,…………………………………………………4分
如图,在数轴上表示不等式①、②的解集如下:
………………5分
∴ 原不等式组的解集为: . ……………………………6分
20.(6分)解:设应从第二组调 人到第一组 …………………………………………1分
根据题意,得 ……………………………………3分
解得 ……………………………………………………………5分
答:应从第二组调5人到第一组. ………………………………………6分
21.(8分)解:(1)设商场购进甲种节能灯 只,购进乙种节能灯 只,……………1分
根据题意,得 , ……………………………3分
解这个方程组,得 …………………………………5分
答:甲、乙两种节能灯分别购进40、60只。……………………6分
(2)商场获利= (元)
………………………………………………………………7分
答:商场获利1300元………………………………………………8分
22.(8分)解:∵ …………………………1分
, ,
∴ ………………2分
∵ 平分
∴ …………………………………………………3分
同理可得, ………………………………………4分
∵ ……………………………………5分
∴
………………………………………6分
…………………………………………7分
…………………………………………………………………8分
23.(10分)解:(1)如图所示: 即为所求; …………………………………3分
(2)如图所示: 即为所求.…………………………………6分
(3)如图所示: 即为所求.…………………………………10分
24.(10分)解:(1)3 ………………………………………………………………… 2分
(2)①∵ ≌
∴ ,………………………………………… 3分
……………………………………… 4分
∵
∴ ………………………… 5分
∴ ……………6分
②∵ 是 的外角
∴ ………………………………… 7分
……………………………… 8分
∵ 是 的外角
∴ ……………………………… 9分
…………………………… 10分
25.(12分)解:(1)设该校选送传统花灯 盏,则创意花灯(30- )盏,
依题意,得: ,……………2分
解得 ……………………………………………………3分
∵ 为正整数,
∴取 或 ……………………………………………………4分
当 时,该校选送传统花灯1盏,创意花灯29盏;………5分
当 时,该校选送传统花灯2盏,创意花灯28盏. … ……6分
(2)设选送传统花灯 盏,创意花灯 盏,则现代花灯 盏,
………………………………………………………………………7分
依题意,得: , ……………8分
解得 ,即 …………………………9分
∵ 、 必须为正整数,
∴ 应取 的倍数,即 或 ……………………………10分
方案一:当 , 时,即该校选送传统花灯 盏,创意花灯 盏,现代花灯 盏;………………………………11分
方案二:当 , 时,该校选送传统花灯 盏,创意花灯 盏,现代花灯 盏. …………………………………12分
26.(14分)解:(1)3, 60, 60; ……………………………………3分
(2)∵ ,
∴ 是等边三角形,
∴ [或者由(1)结论也得分)]……4分
∵ 是由 绕点 旋转而得到的,且边 与 重合
∴ ,……………………………………5分
……………………………………………………6分
∴ 是等边三角形, ………………………………………7分
∴ ………………………………………………8分
(3)画图正确(画对点 、点 中的一个点得1分)……………10分
画图方法:
①画点 关于边 的对称点 ,………………………………11分
②画点 关于边 的对称点 , ……………………………12分
③连结 ,分别交 、 于点 、 ,
此时 周长最小. ………………………………………13分
周长最小值为2. ……………………………………14分
人教版七年级数学下册期末测试题及答案相关 文章 :
1. 人教版七年级下学期期末数学试卷
2. 七年级数学期末测试卷答案
3. 七年级数学期末测试题
4. 七年级数学期末考试卷及答案
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人教版七年级英语期末试卷及答案
既要方法,也要学习者的恒心、毅力。现在就到七年级英语期末考试,别忘面带微笑。下面是我为大家精心推荐的人教版七年级英语下期末试卷,希望能够对您有所帮助。
人教版七年级英语下期末试题
第一部分 听力测试(25分)
一、听力(共20小题,1-15小题每题1分,16-20小题每题2分,共25分)
第一节: 听录音,从A、B、C三个选项中选择音标或者单词。
1. A. / kri / B. / k / C. / kraІ /
2. A. / ip / B. / tip / C. / dip /
3. A. / p / B. / bІ / C. / b /
4. A. thirty B. early C. clearly
5. A. character B. calculator C. cassette
第二节:听问句,选择正确的答语。
6. A. Yes, I do. B. Yes, I did. C. Yes, I was.
7. A. No, I don’t know. B. It is expensive. C. By ferry.
8. A. Yes, it was. B. Yes, I was. C. Yes, she is.
9. A. Yes, she is. B. Yes, they will. C. Yes, they are.
10. A. Have a good time! B. Why? C. Don’t go there.
第三节:听短对话,根据对话内容,选择正确答案回答问题。
11. What did Jim do last Sunday?
A. He went to the zoo. B. He stayed at school. C. He watched TV at home.
12. Which movie star does Sara like best?
A. Jackie Chan. B. Zhou Xun. C. Liu Dehua.
13. What is Peter’s uncle’s job?
A. A teacher. B. A worker. C. A doctor.
14. Where was Lingling last summer?
A. In Beijing. B. In Shanghai. C. In Chongqing.
15. When was Lily born?
A. On November 5, 1919. B. On November 20, 1990. C. On November 25, 1999.
第四节:听较长 对话,根据对话内容,选择正确答案回答问题。
听第一段对话,回答第16-17小题。
16. Which is Wang Mei’s favourite festival?
A. Chinese New Year. B. Mid-Autumn Festival. C. Dragon Boat Festival.
17. Why does she like it?
A. Because she can eat mooncakes.
B. Because she can get a lot of presents.
C. Because she can get some rice dumplings.
听第二段对话,回答第18-20小题。
18. Does the woman know the date of Father’s Day?
A. She is not sure. B. Yes, she does. C. No, she doesn’t.
19. What will the man buy for his father?
A. A watch. B. A shirt. C. A coat.
20. What does the woman think of the man’s idea?
A. It’s good. B. It’s boring. C. It’s bad.
第二部分 笔试(95分)
二、选择填空(共20小题,每小题1分,共20分)
21. 动词live的过去式为lived, 划线部分的读音为_______.
A. / d / B. / t / C. / Id /
22. There is no food in the kitchen. I’ll _______.
A. do some cle aning B. going cleaning C. do some shopping
23. September 10th is ______.
A. Women’s Day B. Teachers’ Day C. Labour Day
24. --_______ do you go to travel?
-- Once a year.
A. How long B. How many C. How often
25. Every one in our class is looking forward to ______Beijing.
A. visit B. visiting C. visited
26. Look! Linda _______ the bus over there.
A. waiting for B. waits for C. is waiting for
27. I often decorate my bedroom ____ beautiful pictures.
A. with B. for C. of
28. I am _______ in English, because it’s very _______.
A. interested; interesting B. interested; interested C. interesting; interested
29. He goes to school ______ every day.
A. ride a bike B. take a bike C. by bike
30. Basketball is ______ than gymnastics.
A. popular B. more popular C. the most popular
31. I am going to revise _______ my test.
A. with B. to C. for
32. She _______, but found nothing.
A. looked at B. looked around C. looked after
33. --Will there be many tall buildings in the city?
-- Yes, _______.
A. there will B. there won’t C. they won’t
34. --_______ is the population of your city?
-- About two million.
A. How B. What C. How much
35. The Changjiang River is the _______ river in China.
A. long B. longer C. longest
36. -- _______?
-- He is friendly and naughty.
A. What does he do B. What is he like C. How is he
37. --What food do you like best?
--Chicken. I always think it is ______.
A. friendly B. expensive C. delicious
38. -- Did you go to the park yesterday?
-- _______. We stayed at home.
A. No, we don’t B. No, we didn’t C. Yes, we did
39. _______ takes me half an hour _______ to school every day.
A. It; to go B. It; for going C. This; to go
40. -- I hope you’ll have a great holiday.
-- _______
A. Thank you. B. You are welcome. C. All right.
三、完形填空(共10小题,每小题1分,共10分)
Tony, you ask me about my country. Now I’ll 41 you something about it. China is a big country, and it is an old country in the world. It is in the 42 of Asia. 43 about 9,600,000 square kilometres(平方公里). And the 44 of China is about 1.3 billion (十亿). China is 45 than Japan, 46 smaller than Russia. There are 47 lakes, mountains and rivers in China. It’s famous 48 its long history.
Beijing is the 49 of China. There are many places of interest. The weather in Beijing is very 50 in summer, and very cold in winter. But there are still millions of visitors all over the world every year.
41. A. speak B. say C. tell
42. A. east B. south C. north
43. A. It B. Its C. It’s
44. A. history B. population C. shape
45. A. bigger B. big C. biggest
46. A. so B. but C. or
47. A. lots of B. lot of C. a lot
48. A. as B. for C. of
49. A. capital B. river C. hometown
50. A. cool B. warm C. hot
四、阅读理解(共15小题,每小题2分,共30分)
A
Do you know what people are doing in different places now? Let’s have a look.
Place: Paris
Time: 10:30
Name: Tom
Age: 13
Doing: Starting his math lesson Place: New York
Time: 14:30
Name: Mary
Age: 12
Doing: Having afternoon tea at home Place: London
Time: 9:30
Name: Tim
Age: 15
Doing: Eating hamburgers and drinking Coke in KFC
51. Where is Tim from?
A. China. B. America. C. England.
52. Who is taking classes at school now?
A. Mary. B. Tom. C. Tim.
53. If (如果) it is ten o’clock in the evening in Paris, what time is it in New York?
A. Two o’clock in the morning.
B. Three o’clock in the afternoon.
C. Five o’clock in the evening.
54. How old was Tom last y ear?
A. 12. B. 13. C. 14.
55. Which is Right?
A. Tim and Tom are sleeping now.
B. It is in the afternoon in New York now.
C. Mary is having dinner at home.
B
Hello, everyone. I’m a little rabbit(兔子). My name is Jim. I was born in a mountain five years ago. Yesterday was Saturday. It was my birthday. The weather was fine. But my parents were out. I had no sisters or brothers to play with, so I was not happy. Just at that time, the door of my bedroom was open. “Happy Birthday!” All my friends were in my bedroom with many presents for me. There was a cake from my best friend — little horse, some flowers from little pig ...
I was so happy. Then we were out to the garden to play. Oh, there was a bike under the tree. There was a piece of paper on it. It was from my parents. “Happy birthday to you, my son.” Oh, my parents were not out!
It was exciting to have such a great birthday party.
56. Which day is rabbit Jim’s birthday?
A. Friday. B. Saturday. C. Sunday.
57. How many people are there in Jim’s family?
A. 3. B. 4. C. 5.
58. What present did Jim get from his parents?
A. A cake. B. A book. C. A bike.
59. Which is TRUE according(根据) to the passage?
A. Jim has only two friends.
B. Jim is five years old now.
C. Jim’s parents bought him a piece of paper for his birthday.
60. What’s the best title for the passage?
A. A Great Birthday. B. A Nice Holiday. C. My Family.
C
Tara lives in England and she has a car. Helen lives in the USA and she has a car, too. Tara and Helen are drivers. They drive the cars very carefully.
There are many differences between their cars. Do you know the real differences? When Tara drives in England, she will drive on the left-hand. Everyone in England drives on the left. But Helen drives on the right, because Americans drive their cars on the right-hand side of the road.
Tara goes to work five days a week by car. She is a history teacher in a middle school. Her house is very far from her school. Every day she gets up early and drives to work. There are only some cars on the road because English people like to take a train. And Helen goes to work by car, too. She works only 3 days a week. She is a manager in a factory. It’s not very far from her home. But there are a lot of cars on the road. Americans like to go to work by car.
Tara gets home very late. She usually has supper at 8:00. Helen gets home at 5:00 and she has dinner at 6:30.
61. Tara is from _______.
A. America B. China. C. England
62. Americans drive their cars on the _________.
A. right B. bridge C. left
63. What does the underlined(画线的) word differences in the passage means ________.
A. 相同之处 B. 相似之处 C. 不同之处
64. From the passage, we know Tara is a _________.
A. manger B. teacher C. farmer
65. Which of the following is not true according to the passage?
A. Americans like to drive to work.
B. English people like to go to work by train.
C. Tara works three days a week.
五、任务型阅读(共5小题,每小题1分,共5分)
阅读短文,根据短文内容,完成下面表格。
What are they doing for holiday?
The weather is so nice. Mary and his friends are on holiday. They are in the park having a good time. Look! Mary is drawing pictures on the grass. Tom is fishing by the lake with Jesse. Jack is learning taking photos. Lucy and Lily are good at art, so they are dancing and singing under the tree. All of them are very happy!
A good time in the 66
Name Place Activities (活动)
Mary On the 67 Drawing
Jesse and 68 By the lake Fishing
Lucy and Lily 69 70
六、词汇与句型(每个空格1分,共20分)
A)根据句意及括号内所给的音标或汉语提示写出所缺单词, 每空一词。
71. I worked very hard on the _________ (/ fm /).
72. My mother is good at _________ (/ 'kkI /), so she often makes nice food for us.
73. I am writing a _________ (明信片) now.
74. Lingling’s grandmother is _________ (打扫) the floor now.
75. There are lots of old buildings and _________ (教堂) in Cambridge.
76. Table tennis is _________ (安全) than skiing.
77. Nobody can learn English _________ (迅速地) and speak it well without hard working.
78. I was _________ (出生) in a small village in Shanxi Province.
79. She opened her eyes, _________ (跳) out of bed and hurried out of the house.
80. _________ (五月) is the fifth month of the year.
B. 句型转换,按要求改写句子,每空一词。
81. They are playing basketball now. (就划线部分提问)
______ are they ______ now?
82. They are going to leave here tomorrow.(改为否定句)
They ______ ______ to leave here tomorrow.
83. Was Jim a student in 1998?(作肯定回答)
Yes, ______ ______.
84. I lived in a small village. (就划线部分提问)
______ ______ you live?
85. There will be a computer on every desk in the future. (改为一般疑问句)
Will ______ ______ a computer on every desk in the future?
七、书面表达(10分)
来自美国的Tony是你的新同学。周末他到你家做客,看到了你爷爷的照片,请根据表格内容,以“My grandfather”为题写一篇短文,向他介绍你的爷爷。
要求:
(1)可以对所给提示进行适当取舍,也可适当发挥;
(2)短文中不得出现真实的人名、地名和校名;
(3)词数60-90。
Birthday On March 3, 1945
Birthplace In a small town
In 1950 Moved to the city with his parents
In 1951 Started school
In 1965 Finished school
In 1966 Became a teacher
In 1970 Got married
In 1973 Had a baby
请注意大小写和标点符号,字母书写不符合相关规范或字迹潦草的要扣分。
My grandfather
_______________________________________________________________________
_______________________________________________________________________
七年级听力材料
第一节: 听录音,从A、B、C三个选项中选择音标或者单词。其中第1--3题为选择音标,第4--5题为选择单词。每个小题读一遍
1. cry 2. cheap 3. bear 4.early 5. character
第二节:听问句,选择正确的答语。每个小题读一遍。
6 .Did you read the story Goldilocks?
7. How did you go there?
8. Was it your primary school?
9. Will Sally and Tony come to our house tonight?
10. I am going to Los Angeles.
第三节:听短对话,根据对话内容,选择正确答案回答问题。每段对话读一遍。
11. W: Jim, did you go to the park last Sunday?
M: No, I stayed at home and watched TV.
12. M: Sarah, do you like Jackie Chan?
W: Yes, he is my favourite movie star.
13. W: Does your uncle work in a hospital, Peter?
M: No, he doesn’t. He teaches English in a school.
14. M: Where did you go last summer, Lingling?
W: I went to Shanghai to see my grandpa.
15. M: When were you born, Lily?
W: I was born on November 25, 1999.
第四节:根据所听的较长对话,选择正确答案回答问题。每段对话读两遍。
听第一段对话,回答第16-17小题。
M: Hello, Wang Mei!
W: Hello, Luo Sang!
M: Which is your favourite festival?
W: I like Chinese New Year best.
M: Why do you like it?
W: Because I can get a lot of presents from my parents and friends.
听第二段对话,回答第18-20小题。
M: Hello, Maria! Do you know when Father’s Day is?
W: No, I don’t know.
M: Father’s Day is on the third Sunday in June. So I am going to buy a watch for my dad.
W: A nice watch would be a very good present.
M: What are you going to give to your father?
W: Let me see. I’ll also buy a watch for him and say “Happy Father’s Day!” to him.
M: Your father will be very glad if you do that.
W: I think so.
人教版七年级英语下期末试卷参考答案
一、听力(1-15小题每题1分,16-20小题每题2分,共25分)
1-5 CBCBA 6-10 BCABA 11-15 CAABC 16-20 ABCAA
二、单项选择(每小题1分,共20分)
21-25 ACBCB 26-30 CAACB 31-35 CBABC 36-40 BCBAA
三、完形填空(每小题1分,共10分)
41-45 CACBA 46-50 BABAC
四、阅读理解(每小题2分,共30分)
51-55 CBAAB 56-60 BACBA 61-65 CACBC
五、任务型阅读(每小题1分,共5分)
66. park/holiday 67. grass 68. Tom 69. under the tree 70. dancing and singing
六、词汇句型(每个空格1分,共20分)
71. farm 72. cooking 73. postcard 74. cleaning/sweeping
75. churches 76. safer 77. quickly 78. born
79. jumped 80. May 81.What doing
82. aren’t going 83. he was
84. Where did 85. there be
七、书面表达(10分)
One possible version:
My grandfather was born on March 3, 1945 in a small town. He mo ved to the city with his parents when he was five years old. He started school in 1951, and finished school in 1965. He became a teacher at the age of 21.
七年级下册英语第一单元练习题
七年级(下)英语期末测试卷
I. 单项填空
( ) 1. ---Hi, John. Where did you ______ your winter holiday this year?
---Well, we stayed in Harbin.
A. have B. spend C. use D. cost
( ) 2. Did you see Mary’s sister? What does she ______?
A. be like B. is like C. look like D. like
( ) 3. The book describes a girl ______ Alice.
A. calling B. name C. called D. to call
( ) 4. ---Excuse me, sir. Would you like to have a look at the ______ now?
---OK. By the way, are there any specials in your restaurant today?
A. order B. dish C. cook D. menu
( ) 5. He decided to do it by himself and wouldn’ listen to my ______.
A. exercise B. suggestion C. word D. music
( ) 6. When the telephone rang, he stopped ______ the novel and got up to answer it.
A. to read B. reading C. reads D. be read
( ) 7. Look! Two students are standing ______ the class making a dialogue.
A. in the front of B. in front of C. next to D. outside
( ) 8. He is a good basketball player ______ the city’s basketball team.
A. for B. on C. in D. with
( )9. This is a difficult problem. Let’s have a meeting to ______ it.
A. report B. watch C. show D. discuss
( ) 10. ---Where are my toys, mum? ---Oh, I ______ them under the bed.
A. left B. put C. took D. made
( ) 11. If you are ______, we can stop to have dinner.
A. tired B. angry C. sleepy D. hungry
( ) 12. ---Can you tell me how I can ______ my spoken English?
---Practice it every day.
A. learn B. improve C. study D. speak
( ) 13. ---I want to know your idea about ______.
---Well, I think that’s something popular.
A. museum B. fashion C. soap opera D. culture
( ) 14. At the class meeting, many students gave their ______ about family rules.
A. sounds B. opinions C. situations D. minds
( ) 15. ---What does your father ______ your new jeans?
---He doesn’t like it at all.
A. like of B. look at C. look for D. think of
II. 补全对话
(A) 从方框内所给句子中选择恰当的句子完成下面对话。
A: Good afternoon! Can I help you?
B: Yes, please! ___1___
A: We have many popular kinds, like Nike, Adidas and so on.
B: I like the things made in China. ___2___
A: Yes, Li Ning is also popular here. What about this pair? ___3___
B: Well, I don’t want a new kind. But I’d like a practical(实用的) kind.
A: This pair looks nice. It came to the market half a year ago. It sells well.
B: ___4___
A: 350 yuan.
B: ___5___ But I’ll take them.
A. That’s a bit expensive. B. It’s a new kind in the market.
C. I’m looking for a pair of sports shoes. D. Do you have Li Ning sports shoes?
E. Sorry, we don’t have any. F. How much are they?
G. I want a pair of Nike shoes.
(B)在下面对话的空白处填入适当的话语(可以是句子、短语或词),使对话完整。
A: Hello, can I help you?
B: Hello. I want to order a pizza.
A: Sure.What ___1___ would you like?
B: I’d like a large pizza
A: ____2____ on it?
B: Tomatoes and mushrooms.
A : OK. Anything else?
B: No, thanks.
A: Your ____3____, please?
B: 65 Fifth Avenue.
A: And your ____4_____?
B: It’s 6611019 .
A:That’ll be 2 dollars.And we’ll deliver your pizza in 20 minutes.
B: Thanks a lot.
A: ____5_____.
III. 完形填空
A man went into a restaurant one day. He sat down at the __1__ near the window. A waiter came up to __2__ and said, “Can I help you, sir?” The man said, “Can I see the __3__, please? I would like a __4__ meal(餐).” Then the man __5__ a lot of nice dishes. The waiter got them for him at once. The man was eating his meal. At that time a boy came in and sat down next to the man. He asked the __6__ to give him an ice-cream. The man says, “I go out __7__ a newspaper.” Then he went out. After the boy ate his ice-cream up, he __8__ and went to the door.
“__9__, your father doesn’t give the money for the meal and your ice-cream,” the waiter stopped him and said.
“Father? No, I don’t __10__ him. I meet him in the street. He says he can give me an ice-cream if I come here on time.”
( ) 1. A. desk B. chair C. sofa D. table
( ) 2. A. her B. him C. them D. it
( ) 3. A. newspaper B. food C. menu D. price
( ) 4. A. cheap B. good C. lot D. bad
( ) 5. A. ordered B. made C. cooked D. ate
( ) 6. A. waiter B. man C. boy D. father
( ) 7. A. with B. as C. for D. and
( ) 8. A. sat down B. stood up C. went to bed D. had a rest
( ) 9. A. Sorry B. Excuse me C. Hello D. OK
( ) 10. A. like B. help C. know D. tell
IV. 阅读理解
Passage 1
Mr Green kept hundreds of chickens on his farm. He sold the eggs and the meat to the local people. He got quite a lot of money from it, but he lived in a very hot part of the country, and he found that his hens laid(下) few eggs in summer. So he decided to put air conditioners(空调) into the chicken house in order to let the hens lay well all the year. By this he could have more eggs and get more money.
After Mr Green called the air conditioner company, a worker from the company came to see Mr Green. He thought that he might make Mr Green buy more air conditioners.
“Your wife may be very happy if you buy air conditioners for your house,” he said to Mr Green. But Mr Green was not interested. “My wife doesn’t lay eggs,” he said.
( ) 1. Mr Green ________.
A. was a fruit farmer B. sold air conditioners
C. sold vegetables D. was a chicken farmer
( ) 2. His hens laid few eggs in ________.
A. summer B. spring C. winter D. autumn
( ) 3. He thought the hens didn’t lay many eggs because they were ______
A. old B. thin C. too hot D. young
( ) 4. He wanted to put air conditioners into ______.
A. his office B. the bedroom
C. the chicken house D. the living room
( ) 5. The underlined word it means ________.
A. the farm house B. selling eggs and meat to other people
C. meat D. living in a very hot part of the country
Passage 2
( ) 6. You can have breakfast ________.
A. at 7:00 in the morning B. at 9:00 in the morning
C. at 9:45 am D. at 8:00 am
( ) 7. You can go to the coffee house at ______.
A. 10:00 B. 11:30 C. 1:00 am D. 11:00
( ) 8. If you want to have breakfast in your room, you need to ________.
A. fill in a card and put it outside B. make a telephone call to the waiter
C. find a waiter and tell him
D. buy your breakfast in the dining room and bring it back to your room
( ) 9. Which one of the following is RIGHT?
A. You can see a film on Monday evening.
B. The film begins at 19:00 every evening.
C. You can buy some things in the hotel shop at 16:30.
D. You can have dinner at 9:00 in the evening.
( ) 10. Dining room is a room for ________.
A. washing clothes B. having meals
C. waiting for rooms D. dancing
Passage 3
Welcome to Parkside, a very famous area of London. Your walking tour(游览) begins on First Street at the Windsor Hotel. Turn left out of the hotel, and walk down to Stanley Street. On the corner you will see the historic Parkside library. Many people think this is a very beautiful building in Parkside. Cross first Street, but be careful, because it is a very busy street. Walk down Stanley Street to Second Street. On the corner of Stanley Street and Second street you will find the Grand Hotel. This famous hotel is 100 years old. Turn right into Second Street. Next to the Grand Hotel you will see the Parkside Museum. This is the oldest(最古老的) building in the city. Look across the street and you will see Garden Park. Next to Garden Park, on the right, is the City Zoo. Keep walking down Second Street to Walker Avenue. On the corner of Second Street and Walker Avenue is the Tourist Shop. Here you can buy postcards of Parkside. Continue walking down Walker Avenue, and you will find yourself back at the Windsor Hotel.
( ) 1.This passage is _______.
A. a newspaper article B. a tourist guide
C. an advertisement D. a story
( ) 2. Parkside is _______.
A. a city B.a town C. part of a city D. a country
( ) 3. The oldest building in Parkside is a ________.
A. museum B. library C. hotel D. zoo
( ) 4. Parkside is a good place for people to enjoy ________.
A. shopping B. sightseeing C. sports D. food
( ) 5. Parkside is in _______.
A. China B. Britain C. Japan D. America
Passage 4
In the world today, all of the people need to relax. We cannot work all the time if we want to be healthy and enjoy life.
Everyone has his own way of relaxing. A very popular way is to take part in sports. There are team sports, such as basketball and soccer. There are also individual sports, such as swimming and running. Skating and mountain climbing are the most popular recreation for people who like to be outdoors.
Some people enjoy sports but don’t want to take part in them. They like watching sports games on TV or listening to them on the radio. So these people like some ways of indoor recreation, such as watching TV, singing and dancing.
Different recreations make people have healthy body and mind. They know when to work and when to relax. When they feel relaxed, they can have much energy(精力) for their work. So people should(应该) know how to work, but they should also know how to relax.
( )1. A very popular way of recreation is ______.
A. doing sports. B. watching TV
C. sleeping D. singing and dancing
( )2. People want to take part in sports to __________.
A. keep healthy and enjoy life B. make friends
C. find a good job D. make money
( )3. Which of the following is an outdoor recreation?
A. watching TV B. singing
C. listening to the radio D. skating
( )4. What do you think the phrase “all the time” mean in Chinese?
A. 寻常地 B. 间歇地
C. 一直地 D. 努力地
( )5. The passage mainly tells us that__________.
A. basketball is a kind of team sport
B. everyone liks doing sports in their free time
C. different people have different ways of relaxing
D. indoor recreation is important
Passage 5
Dick works in an office in the city. He works very hard and really looks forward to his holiday.
He usually goes to the seaside(海边), but this year his friend tells him to go to the farm for a holiday. There’s good food and clean air. People can ride horses, have a walk and go fishing there.
“That’s a good idea.” he thinks, “I’ll spend a month on the farm. I’ll enjoy horse riding, walking and fishing. I’ll make a change. He is ready to spend his holiday on the farm. Then, he leaves for the farm. Four days later, he comes back home. “What’s wrong with the farm?” his friend Jim asks, “Did you enjoy your country life?” “Yes, country life was fine,” Dick says, “but there’s another problem.” “Oh? What?” Jim asks. “Well,” he says, “the first day I was there, a sheep died, and we had roast lamb(烤羊) for dinner.” “What’s wrong with that?” Jim says, “Fresh(新鲜) meat is the best.” “ I know, but on the second day a cow died, and we had roast beef for dinner.” “That’s great.” Jim cries. “You don’t understand,” Dick says. “On the third day a pig died and we had roast pork for dinner.” “A different roast every day,” Jim says, “why are you still complaining(抱怨)?” “Let me finish.” Dick says, “On the fourth day, the farmer died and I didn’t dare(敢) to stay for dinner!”
1. Where does Dick usually go for a holiday?
_______________________________________
2. Why does Dick want to go to the farm for a holiday?
_______________________________________
3. How many days does Dick spend on the farm?
_______________________________________
4. When did Dick eat the roast beef for dinner?
_______________________________________
5. Why does Dick came back so early?
_______________________________________
V.单词拼写
1. Yesterday I went to the supermarket and ________(预订) a new kind of bike.
2. On his way ________(往回去) home, he lost his key.
3. I ________(真正地) don’t agree with you.
4. Is there ________(任何事物) else in the bag?
5. I usually have some ________(粥) for breakfast before I leave for work in the morning.
6. The policeman ________(阻止) a black car and asked the driver to show his ID card.
7. Mrs Green is medium ________(体型) and has curly blonde hair.
8. There are five ________(特色菜) in this restaurant. It’s very crowded.
9. We had great fun _______(参观) the Great Wall last Friday morning.
10. He is ________(一直) thinking of others first and then himself.
VI. 从方框中选择适当的词或短语,并用其正确形式填空
with, take, teach, because, young, middle, but, well, go for a walk, play with
Tom likes walking. He ___1___ after his father comes back from work. Tom likes water very much. H often ___2___ his toys in the water, so he is wet(湿的) all over sometimes. His mother says, “Are you from fish?” Tom is very glad, “Yes, I like fish very much ___3___ fish can swim.”
One Sunday morning, Tom went to a park ___4___ his father. There was a swimming pool in the ___5___ of the park. Tom asked his father to ___6___ him to the pool. “Why do you want to go there?” asked his father.
“Because I want to learn swimming,” answered Tom. “And you can ___7___ me.”
“You are too ___8___, and I’m sorry I can’t swim,”said the father.
“You can’t swim? Jack’s father swims very ___9___. Why can’t you swim?”
“Because his father likes eating fish,” said the father.
“Oh, I see.” said Tom. “___10___ you like eating chicken very much. Can you lay eggs(下蛋)?”
VII. 翻译句子,每空只填一个单词
1. 假如你想要身体健康,那你得多锻炼。
You ________ ________ take more exercise ________ you want to be ________.
2. 走到动物园,花了我们一个半小时
We ________ one and a half hours ________ to the zoo.
3. 他正在考虑如何才能解出这道难题。
He is ________ about ________ he can work out the hard problem.
4. 当你穿这条繁华的街道时,不要跑。
________ ________ when you ________ the ________ street.
5. 汤姆通常在外面吃饭,因为他不会做饭。
Tom usually ________ ________ because he ________ ________.
6. 我这里正下着雪呢,你那边的天气如何?
________________ here. ____________________ there?
7. 琳达说迈克在他们学校篮球队很受欢迎,他长得什么样子?
Linda says that Mike _____________ in the school basketball team. _________________?
8. 我们餐馆有许多种类的面条。你想要多大碗的面条?
Our restaurant has _________________ noodles. ______________________________?
9. 我真的忍受不了下雨天,因为那让我感觉乏味。
I really can’t __________________ because they _______________________ bored.
10. 不要在教室里面打闹。我认为你应该先学习一下学生守则。
_______________ in the classroom. I think you should ________________ first.
VIII. 书面表达
以“My Family Life with a Computer”为题目,写一篇短文。词数80个左右,内容包括你和你的家人用电脑做什么,电脑给你的家庭带来了什么影响等。
My Family Life with a Computer
_____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
七年级(下)英语期末测试卷
I. 1-5 BCCDB 6-10 BABDB 11-15 DBBBD 16-20 CADBA
II. 1-5 CDBFA
6. size 7.What do you like 8. address 9. phone number 10. You are welcome
III. 1-5 DBCBA 6-10 ACBBC
IV. 1-5 DACCB 6-10 DCACB 11-15 BCABB 16-20 AADCC
21. He usually goes to the seaside.
22. Because he wants to enjoy horse riding, walking and fishing.
23. Four days.
24. On the second day of his holiday.
25. Because the farmer died on the fourth day and he didn’t dare to stay there.
V. 1. ordered 2. back 3. really 4. anything 5. porridge 6. stopped 7. build 8. specials 9. visiting 10. always
VI. 1. goes for a walk 2. plays with 3. because 4. with 5. middle 6. take 7. teach 8. young 9. well 10. But
VII. 1. have/need, to, if, healthy 2. spent, walking 3. thinking, how 4. Don’t, run, cross, busy
5. eats, outside, can’t, cook 6. It’s snowing, How is the weather 7. is very popular, What does he look like 8. many kinds of, What size bowl of noodles would you like 9. stand rainy days, make me feel 10. Don’t fight, learn the students’ rules
VIII. One possible version:
My Family Life with a Computer
Computer is popular in our modern life. There is a computer in my family, too. My parents bought it three years ago. They put it in the sitting room.
Father is an engineer. He starts the computer after supper every evening and reads sports news on the Internet. Sometimes he looks for some information. Mother is a teacher. She likes reading, so she often reads e-books on it. I often watch movies on it or play computer games. It is great fun!
Now the computer becomes one of our best friends.
七年级下册数学试卷及答案
知识有重量,但成就有光泽。有人感觉到知识的力量,但更多的人只看到成就的光泽。下面给大家分享一些关于七年级下册数学试卷及答案,希望对大家有所帮助。
一、选择题(本题共10小题,每小题3分,共30分)
1.(3分)下列各数: 、 、0.101001…(中间0依次递增)、﹣π、 是无理数的有()
A. 1个 B. 2个 C. 3个 D. 4个
考点: 无理数.
分析: 根据无理数的定义(无理数是指无限不循环小数)判断即可.
解答: 解:无理数有 ,0.101001…(中间0依次递增),﹣π,共3个,
故选C.
点评: 考查了无理数的应用,注意:无理数是指无限不循环小数,无理数包括三方面的数:①含π的,②开方开不尽的根式,③一些有规律的数.
2.(3分)(2001?北京)已知:如图AB∥CD,CE平分∠ACD,∠A=110°,则∠ECD等于()
A. 110° B. 70° C. 55° D. 35°
考点: 平行线的性质;角平分线的定义.
专题: 计算题.
分析: 本题主要利用两直线平行,同旁内角互补,再根据角平分线的概念进行做题.
解答: 解:∵AB∥CD,
根据两直线平行,同旁内角互补.得:
∴∠ACD=180°﹣∠A=70°.
再根据角平分线的定义,得:∠ECD= ∠ACD=35°.
故选D.
点评: 考查了平行线的性质以及角平分线的概念.
3.(3分)下列调查中,适宜采用全面调查方式的是()
A. 了解我市的空气污染情况
B. 了解电视节目《焦点访谈》的收视率
C. 了解七(6)班每个同学每天做家庭作业的时间
D. 考查某工厂生产的一批手表的防水性能
考点: 全面调查与抽样调查.
分析: 由普查得到的调查结果比较准确,但所费人力、物力和时间较多,而抽样调查得到的调查结果比较近似.
解答: 解:A、不能全面调查,只能抽查;
B、电视台对正在播出的某电视节目收视率的调查因为普查工作量大,适合抽样调查;
C、人数不多,容易调查,适合全面调查;
D、数量较大,适合抽查.
故选C.
点评: 本题考查了抽样调查和全面调查的区别,选择普查还是抽样调查要根据所要考查的对象的特征灵活选用,一般来说,对于具有破坏性的调查、无法进行普查、普查的意义或价值不大时,应选择抽样调查,对于精确度要求高的调查,事关重大的调查往往选用普查.
4.(3分)一元一次不等式组 的解集在数轴上表示为()
A. B. C. D.
考点: 在数轴上表示不等式的解集;解一元一次不等式组.
分析: 分别求出各不等式的解集,再求出其公共解集,并在数轴上表示出来即可.
解答: 解: ,由①得,x2,由②得,x≥0,
故此不等式组的解集为:0≤x2,
在数轴上表示为:
故选B.
点评: 本题考查的是在数轴上表示不等式组的解集,熟知“同大取大;同小取小;大小小大中间找;大大小小找不到”的原则是解答此题的关键.
5.(3分)二元一次方程2x+y=8的正整数解有()
A. 2个 B. 3个 C. 4个 D. 5个
考点: 解二元一次方程.
专题: 计算题.
分析: 将x=1,2,3,…,代入方程求出y的值为正整数即可.
解答: 解:当x=1时,得2+y=8,即y=6;当x=2时,得4+y=8,即y=4;当x=3时,得6+y=8,即y=2;
则方程的正整数解有3个.
故选B
点评: 此题考查了解二元一次方程,注意x与y都为正整数.
6.(3分)若点P(x,y)满足xy0,x0,则P点在()
A. 第二象限 B. 第三象限 C. 第四象限 D. 第二、四象限
考点: 点的坐标.
分析: 根据实数的性质得到y0,然后根据第二象限内点的坐标特征进行判断.
解答: 解:∵xy0,x0,
∴y0,
∴点P在第二象限.
故选A.
点评: 本题考查了点的坐标平面内的点与有序实数对是一一对应的关系.坐标:直角坐标系把平面分成四部分,分别叫第一象限,第二象限,第三象限,第四象限.坐标轴上的点不属于任何一个象限.
7.(3分)如图,AB∥CD,∠A=125°,∠C=145°,则∠E的度数是()
A. 10° B. 20° C. 35° D. 55°
考点: 平行线的性质.
分析: 过E作EF∥AB,根据平行线的性质可求得∠AEF和∠CEF的度数,根据∠E=∠AEF﹣∠CEF即可求得∠E的度数.
解答: 解:过E作EF∥AB,
∵∠A=125°,∠C=145°,
∴∠AEF=180°﹣∠A=180°﹣125°=55°,
∠CEF=180°﹣∠C=180°﹣145°=35°,
∴∠E=∠AEF﹣∠CEF=55°﹣35°=20°.
故选B.
点评: 本题考查了平行线的性质,解答本题的关键是作出辅助线,要求同学们熟练掌握平行线的性质:两直线平行,同旁内角互补.
8.(3分)已知 是方程组 的解,则 是下列哪个方程的解()
A. 2x﹣y=1 B. 5x+2y=﹣4 C. 3x+2y=5 D. 以上都不是
考点: 二元一次方程组的解;二元一次方程的解.
专题: 计算题.
分析: 将x=2,y=1代入方程组中,求出a与b的值,即可做出判断.
解答: 解:将 方程组 得:a=2,b=3,
将x=2,y=3代入2x﹣y=1的左边得:4﹣3=1,右边为1,故左边=右边,
∴ 是方程2x﹣y=1的解,
故选A.
点评: 此题考查了二元一次方程组的解,方程组的解即为能使方程组中两方程成立的未知数的值.
9.(3分)下列各式不一定成立的是()
A. B. C. D.
考点: 立方根;算术平方根.
分析: 根据立方根,平方根的定义判断即可.
解答: 解:A、a为任何数时,等式都成立,正确,故本选项错误;
B、a为任何数时,等式都成立,正确,故本选项错误;
C、原式中隐含条件a≥0,等式成立,正确,故本选项错误;
D、当a0时,等式不成立,错误,故本选项正确;
故选D.
点评: 本题考查了立方根和平方根的应用,注意:当a≥0时, =a,任何数都有立方根
10.(3分)若不等式组 的整数解共有三个,则a的取值范围是()
A. 5a6 p="" 5≤a≤6="" d.="" 5≤a6="" c.="" 5
考点: 一元一次不等式组的整数解.
分析: 首先确定不等式组的解集,利用含a的式子表示,根据整数解的个数就可以确定有哪些整数解,根据解的情况可以得到关于a的不等式,从而求出a的范围.
解答: 解:解不等式组得:2x≤a, p=""
∵不等式组的整数解共有3个,
∴这3个是3,4,5,因而5≤a6.
故选C.
点评: 本题考查了一元一次不等式组的整数解,正确解出不等式组的解集,确定a的范围,是解答本题的关键.求不等式组的解集,应遵循以下原则:同大取较大,同小取较小,小大大小中间找,大大小小解不了.
二、填空题(本题共8小题,每小题3分,共24分)
11.(3分)(2009?恩施州)9的算术平方根是 3 .
考点: 算术平方根.
分析: 如果一个非负数x的平方等于a,那么x是a的算术平方根,根据此定义即可求出结果.
解答: 解:∵32=9,
∴9算术平方根为3.
故答案为:3.
点评: 此题主要考查了算术平方根的等于,其中算术平方根的概念易与平方根的概念混淆而导致错误.
12.(3分)把命题“在同一平面内,垂直于同一条直线的两条直线互相平行”写出“如果…,那么…”的形式是:在同一平面内,如果 两条直线都垂直于同一条直线 ,那么 这两条直线互相平行 .
考点: 命题与定理.
分析: 根据命题题设为:在同一平面内,两条直线都垂直于同一条直线;结论为这两条直线互相平行得出即可.
解答: 解:“在同一平面内,垂直于同一条直线的两条直线互相平行”改写成“如果﹣﹣﹣,那么﹣﹣﹣”的形式为:“在同一平面内,如果两条直线都垂直于同一条直线,那么这两条直线互相平行”.
故答案为:两条直线都垂直于同一条直线,这两条直线互相平行.
点评: 本题考查了命题与定理:判断事物的语句叫命题,命题由题设和结论两部分组成;正确的命题称为真命题,错误的命题称为假命题;经过推理论证的真命题称为定理.
13.(3分)将方程2x+y=25写成用含x的代数式表示y的形式,则y= 25﹣2x .
考点: 解二元一次方程.
分析: 把方程2x+y=25写成用含x的式子表示y的形式,需要把含有y的项移到方程的左边, 其它 的项移到另一边即可.
解答: 解:移项,得y=25﹣2x.
点评: 本题考查的是方程的基本运算技能,表示谁就该把谁放到方程的左边,其它的项移到另一边.
此题直接移项即可.
14.(3分)不等式x+40的最小整数解是 ﹣3 .
考点: 一元一次不等式的整数解.
分析: 首先利用不等式的基本性质解不等式,再从不等式的解集中找出适合条件的正整数即可.
解答: 解:x+40,
x﹣4,
则不等式的解集是x﹣4,
故不等式x+40的最小整数解是﹣3.
故答案为﹣3.
点评: 本题考查了一元一次不等式的整数解,正确解不等式,求出解集是解答本题的关键.解不等式应根据不等式的基本性质.
15.(3分)某校在“数学小论文”评比活动中,共征集到论文60篇,并对其进行了评比、整理,分成组画出频数分布直方图(如图),已知从左到右5个小长方形的高的比为1:3:7:6:3,那么在这次评比中被评为优秀的论文有(分数大于或等于80分为优秀且分数为整数) 27 篇.
考点: 频数(率)分布直方图.
分析: 根据从左到右5个小长方形的高的比为1:3:7:6:3和总篇数,分别求出各个方格的篇数,再根据分数大于或等于80分为优秀且分数为整数,即可得出答案.
解答: 解:∵从左到右5个小长方形的高的比为1:3:7:6:3,共征集到论文60篇,
∴第一个方格的篇数是: ×60=3(篇);
第二个方格的篇数是: ×60=9(篇);
第三个方格的篇数是: ×60=21(篇);
第四个方格的篇数是: ×60=18(篇);
第五个方格的篇数是: ×60=9(篇);
∴这次评比中被评为优秀的论文有:9+18=27(篇);
故答案为:27.
点评: 本题考查读频数分布直方图的能力和利用统计图获取信息的能力;利用统计图获取信息时,必须认真观察、分析、研究统计图,才能作出正确的判断和解决问题.
16.(3分)我市A、B两煤矿去年计划产煤600万吨,结果A煤矿完成去年计划的115%,B煤矿完成去年计划的120%,两煤矿共产煤710万吨,求去年A、B两煤矿原计划分别产煤多少万吨?设A、B两煤矿原计划分别产煤x万吨,y万吨;请列出方程组 .
考点: 由实际问题抽象出二元一次方程组.
分析: 利用“A、B两煤矿去年计划产煤600万吨,结果A煤矿完成去年计划的115%,B煤矿完成去年计划的120%,两煤矿共产煤710万吨”列出二元一次方程组求解即可.
解答: 解:设A矿原计划产煤x万吨,B矿原计划产煤y万吨,根据题意得:
,
故答案为:: ,
点评: 本题考查了由实际问题抽象出二元一次方程组的知识,解题的关键是从题目中找到两个等量关系,这是列方程组的依据.
17.(3分)在平面直角坐标系中,已知线段AB∥x轴,端点A的坐标是(﹣1,4)且AB=4,则端点B的坐标是 (﹣5,4)或(3,4) .
考点: 坐标与图形性质.
分析: 根据线段AB∥x轴,则A,B两点纵坐标相等,再利用点B可能在A点右侧或左侧即可得出答案.
解答: 解:∵线段AB∥x轴,端点A的坐标是(﹣1,4)且AB=4,
∴点B可能在A点右侧或左侧,
则端点B的坐标是:(﹣5,4)或(3,4).
故答案为:(﹣5,4)或(3,4).
点评: 此题主要考查了坐标与图形的性质,利用分类讨论得出是解题关键.
18.(3分)若点P(x,y)的坐标满足x+y=xy,则称点P为“和谐点”,如:和谐点(2,2)满足2+2=2×2.请另写出一个“和谐点”的坐标 (3, ) .
考点: 点的坐标.
专题: 新定义.
分析: 令x=3,利用x+y=xy可计算出对应的y的值,即可得到一个“和谐点”的坐标.
解答: 解:根据题意得点(3, )满足3+ =3× .
故答案为(3, ).
点评: 本题考查了点的坐标平面内的点与有序实数对是一一对应的关系.坐标:直角坐标系把平面分成四部分,分别叫第一象限,第二象限,第三象限,第四象限.坐标轴上的点不属于任何一个象限.
三、解答题(本大题共46分)
19.(6分)解方程组 .
考点: 解二元一次方程组.
分析: 先根据加减消元法求出y的值,再根据代入消元法求出x的值即可.
解答: 解: ,
①×5+②得,2y=6,解得y=3,
把y=3代入①得,x=6,
故此方程组的解为 .
点评: 本题考查的是解二元一次方程组,熟知解二元一次方程组的加减消元法和代入消元法是解答此题的关键.
20.(6分)解不等式: ,并判断 是否为此不等式的解.
考点: 解一元一次不等式;估算无理数的大小.
分析: 首先去分母、去括号、移项合并同类项,然后系数化成1即可求得不等式的解集,然后进行判断即可.
解答: 解:去分母,得:4(2x+1)12﹣3(x﹣1)
去括号,得:8x+412﹣3x+3,
移项,得,8x+3x12+3﹣4,
合并同类项,得:11x11,
系数化成1,得:x1,
∵ 1,
∴ 是不等式的解.
点评: 本题考查了解简单不等式的能力,解答这类题学生往往在解题时不注意移项要改变符号这一点而出错.
解不等式要依据不等式的基本性质,在不等式的两边同时加上或减去同一个数或整式不等号的方向不变;在不等式的两边同时乘以或除以同一个正数不等号的方向不变;在不等式的两边同时乘以或除以同一个负数不等号的方向改变.
21.(6分)学着说点理,填空:
如图,AD⊥BC于D,EG⊥BC于G,∠E=∠1,可得AD平分∠BAC.
理由如下:
∵AD⊥BC于D,EG⊥BC于G,(已知)
∴∠ADC=∠EGC=90°,( 垂直定义 )
∴AD∥EG,( 同位角相等,两直线平行 )
∴∠1=∠2,( 两直线平行,内错角相等 )
∠E=∠3,(两直线平行,同位角相等)
又∵∠E=∠1(已知)
∴ ∠2 = ∠3 (等量代换)
∴AD平分∠BAC( 角平分线定义 )
考点: 平行线的判定与性质.
专题: 推理填空题.
分析: 根据垂直的定义及平行线的性质与判定定理即可证明本题.
解答: 解:∵AD⊥BC于D,EG⊥BC于G,(已知)
∴∠ADC=∠EGC=90°,(垂直定义)
∴AD∥EG,(同位角相等,两直线平行)
∴∠1=∠2,(两直线平行,内错角相等)
∠E=∠3,(两直线平行,同位角相等)
又∵∠E=∠1(已知)
∴∠2=∠3(等量代换)
∴AD平分∠BAC(角平分线定义 ).
点评: 本题考查了平行线的判定与性质,属于基础题,关键是注意平行线的性质和判定定理的综合运用.
22.(8分)在如图所示的正方形网格中,每个小正方形的边长为1,格点三角形(顶点是网格线的交点的三角形)ABC的顶点A、C的坐标分别为(﹣4,5),(﹣1,3).
(1)请在如图所示的网格平面内作出平面直角坐标系;
(2)请把△ABC先向右移动5个单位,再向下移动3个单位得到△A′B′C′,在图中画出△A′B′C′;
(3)求△ABC的面积.
考点: 作图-平移变换.
分析: (1)根据A点坐标,将坐标轴在A点平移到原点即可;
(2)利用点的坐标平移性质得出A,′B′,C′坐标即可得出答案;
(3)利用矩形面积减去周围三角形面积得出即可.
解答: 解:(1)∵点A的坐标为(﹣4,5),
∴在A点y轴向右平移4个单位,x轴向下平移5个单位得到即可;(2)如图所示:△A′B′C′即为所求;(3)△ABC的面积为:3×4﹣ ×3×2﹣ ×1×2﹣ ×2×4=4.
点评: 此题主要考查了平移变换以及三角形面积求法和坐标轴确定 方法 ,正确平移顶点是解题关键.
23.(10分)我市中考体育测试中,1分钟跳绳为自选项目.某中学九年级共有若干名女同学选考1分钟跳绳,根据测试评分标准,将她们的成绩进行统计后分为A、B、C、D四等,并绘制成下面的频数分布表(注:5~10的意义为大于等于5分且小于10分,其余类似)和扇形统计图(如图).
等级 分值 跳绳(次/1分钟) 频数
A 12.5~15 135~160 m
B 10~12.5 110~135 30
C 5~10 60~110 n
D 0~5 0~60 1
(1)m的值是 14 ,n的值是 30 ;
(2)C等级人数的百分比是 10% ;
(3)在抽取的这个样本中,请说明哪个分数段的学生最多?
(4)请你帮助老师计算这次1分钟跳绳测试的及格率(10分以上含10分为及格).
考点: 扇形统计图;频数(率)分布表.
分析: (1)首先根据B等级的人数除以其所占的百分比即可求得总人数,然后乘以28%即可求得m的值,总人数减去其他三个小组的频数即可求得n的值;
(2)用n值除以总人数即可求得其所占的百分比;
(3)从统计表的数据就可以直接求出结论;
(4)先计算10分以上的人数,再除以50乘以100%就可以求出结论.
解答: 解:(1)观察统计图和统计表知B等级的有30人,占60%,
∴总人数为:30÷60%=50人,
∴m=50×28%=14人,
n=50﹣14﹣30﹣1=5;(2)C等级所占的百分比为: ×100%=10%;(3)B等级的人数最多;(4)及格率为: ×100%=88%.
点评: 本题考查了频数分布表的运用,扇形统计图的运用,在解答时看懂统计表与统计图得关系式关键.
24.(10分)(2012?益阳)为响应市政府“创建国家森林城市”的号召,某小区计划购进A、B两种树苗共17棵,已知A种树苗每棵80元,B种树苗每棵60元.
(1)若购进A、B两种树苗刚好用去1220元,问购进A、B两种树苗各多少棵?
(2)若购买B种树苗的数量少于A种树苗的数量,请你给出一种费用最省的方案,并求出该方案所需费用.
考点: 一元一次不等式的应用;一元一次方程的应用.
专题: 压轴题.
分析: (1)假设购进A种树苗x棵,则购进B种树苗(17﹣x)棵,利用购进A、B两种树苗刚好用去1220元,结合单价,得出等式方程求出即可;
(2)结合(1)的解和购买B种树苗的数量少于A种树苗的数量,可找出方案.
解答: 解:(1)设购进A种树苗x棵,则购进B种树苗(17﹣x)棵,根据题意得:
80x+60(17﹣x )=1220,
解得:x=10,
∴17﹣x=7,
答:购进A种树苗10棵,B种树苗7棵;(2)设购进A种树苗x棵,则购进B种树苗(17﹣x)棵,
根据题意得:
17﹣xx, p=""
解得:x ,
购进A、B两种树苗所需费用为80x+60(17﹣x)=20x+1020,
则费用最省需x取最小整数9,
此时17﹣x=8,
这时所需费用为20×9+1020=1200(元).
答:费用最省方案为:购进A种树苗9棵,B种树苗8棵.这时所需费用为1200元.
点评: 此题主要考查了一元一次不等式组的应用以及一元一次方程应用,根据一次函数的增减性得出费用最省方案是解决问题的关键.
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