启东中学中考模拟试卷12
2020年启东中学中考模拟考试(十二)初中数学
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2020年启东中学中考模拟考试(十二)初中数学数学试卷本试卷分第I 卷〔选择题〕和第二卷两部分第I 卷〔选择题,共32分〕一、选择题〔此题共10小题;第1~8题每题3分,第9~10题每题4分,共32分〕 以下各题都有代号为A 、B 、C 、D 的四个结论供选择,其中只有一个结论是正确的。
1.4的算术平方根为A .2B .-2C .±2D .162.以下运算正确的选项是A .228=-B .14931227=-=-C .3)52)(52(-=+-D .23226=-3.英寸是电视机常用规格之一,1英寸约为拇指上面一节的长,如图1所示,那么7英寸长相当于A .课本的宽度B .课桌的宽度C .黑板的高度D .粉笔的长度4.解分式方032222=+---x x x x 时,设y x x=-22,那么原方程变形为A .0132=++y y B .0132=-+y y C .0132=+-y yD .0132=--y y5.小颖从家动身,直走了20min ,到一个离家1000m 的图书室,看了40min 的书后,用15min 返回到家,图2中表示小颖离家时刻与距离之间的关系的是6.如图3所示,路灯距地面8m ,身高1.6m 的小明从距离灯的底部〔点O 〕20m 的点A 处,沿OA 所在的直线行走14m 到点B 时,人影的长度A .增大1.5mB .减小1.5mC .增大3.5mD .减小3.5m7.如图4所示,在△MBN 中,BM=6,点A 、C 、D 分不在MB 、NB 、MN 上,四边形ABCD 为平行四边形,∠NDC=∠MDA ,那么□ABCD 的周长是A .24B .18C .16D .128.小敏在某次投篮中,球的运动线路是抛物线5.3512+-=x y 的一部分,如图5所示,假设命中篮圈中心,那么他与篮底的距离x 是A .3.5mB .4mC .4.5mD .4.6m9.如图6所示,正方形OABC 、ADEF 的顶点A 、D 、C 在坐标轴上,点F 在AB 上,点B 、E 在函数)0(1>=x xy 的图像上,那么点E 的坐标是 A .)215,215(-+B .)253,253(-+ C .)215,215(+-D .)253,253(+- 10.在平面直角坐标系中,1),3A(,O 〔0,0〕,0),3C(三点,AE 平分∠OAC ,交OC 于E ,那么直线AE 对应的函数表达式是A .332-=x y B .23-=x yC .13-=x yD .2-=x y第二卷〔共118分〕二、填空题〔本大题共8小题,每题3分,共24分,把答案填写在题中的横线上。
语文启东中学中考模拟试卷
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一、基础知识(每题2分,共20分)1. 下列词语中,加点字注音完全正确的一项是()A. 惊悚(sǒng)悲怆(chuàng)沉湎(miǎn)B. 沉默(mò)拥挤(jǐ)潮湿(shī)C. 沉着(zhù)雅致(zhì)惊愕(è)D. 沉溺(nì)奔腾(tēng)沉寂(jì)2. 下列句子中,没有语病的一项是()A. 随着社会的发展,科技的进步,我国人民的生活水平得到了很大提高。
B. 为了节约用水,我国政府已经采取了各种措施,但仍有一些人在浪费水资源。
C. 这次比赛,我国运动员不仅取得了优异成绩,而且赢得了国际社会的广泛赞誉。
D. 这本书不仅内容丰富,而且插图精美,深受读者喜爱。
3. 下列句子中,标点符号使用正确的一项是()A. “他喜欢吃的水果有苹果、香蕉、葡萄等。
”B. “我昨天去图书馆借了一本关于历史的书,《三国演义》。
”C. “他的成绩很好,但他的性格却很孤僻。
”D. “我国古代四大发明分别是:造纸术、印刷术、火药、指南针。
”4. 下列词语中,形近字使用正确的一项是()A. 负担负伤负有B. 端详端正端庄C. 舒展舒服舒畅D. 突破突发突然5. 下列句子中,成语使用恰当的一项是()A. 他虽然年纪轻轻,但已经取得了举世瞩目的成就。
B. 这个问题太复杂,我一时难以解决。
C. 她的歌声如天籁之音,让人陶醉。
D. 这本书通俗易懂,适合各个年龄段的人阅读。
二、现代文阅读(每题5分,共20分)阅读下面的文章,完成下列各题。
我国古代四大发明:造纸术、印刷术、火药、指南针(1)造纸术造纸术是我国古代劳动人民的一项伟大发明。
早在西汉时期,我国就已经出现了用麻造纸的技术。
东汉时期,蔡伦改进了造纸技术,使纸张更加轻便、坚韧、便于书写。
这一发明极大地推动了我国文化事业的发展,为人类文明的进步做出了巨大贡献。
(2)印刷术印刷术是我国古代的另一项伟大发明。
启东中学语文中考模拟试卷
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一、基础知识(每题2分,共20分)1. 下列词语中,字形、字音都完全正确的一项是()A. 质朴瓢泼大雨突兀B. 精湛纷至沓来蜷缩C. 恬静气喘吁吁雕琢D. 岁月欣欣向荣装模作样2. 下列各句中,没有语病的一句是()A. 他在讲台上慷慨激昂地讲述着,使得下面的同学们听得津津有味。
B. 老师教导我们要发扬不怕困难、勇往直前的精神。
C. 我觉得这部电影很好看,尤其是里面的特效非常逼真。
D. 他虽然学习努力,但成绩却一直不理想。
3. 下列各句中,标点符号使用正确的一项是()A. 我国拥有悠久的历史和灿烂的文化,中华民族是世界上最优秀的民族之一。
B. “这个问题很难解决吗?”他疑惑地问。
C. 小明说:“我要把我的画送给妈妈。
”D. 我问:“你们班有多少人参加这次比赛?”4. 下列各句中,运用了比喻修辞手法的一项是()A. 那个孩子像一朵盛开的花朵。
B. 天空中的彩虹像一座七彩的桥。
C. 他的声音如同远处的雷声。
D. 那座山好像一只雄狮。
5. 下列各句中,没有错别字的一项是()A. 花园里盛开着五彩缤纷的鲜花。
B. 她的歌声如天籁之音,让人陶醉。
C. 这本书的封面设计得非常精美。
D. 那个孩子把书包里的东西都倒了出来。
二、现代文阅读(每题3分,共15分)阅读下面的文章,回答问题。
小明是个勤奋好学的孩子,他总是认真学习,努力提高自己的成绩。
有一天,他在课堂上遇到了一道难题,想了很久也没有答案。
这时,他突然想起了老师曾经教过他的一个方法:先从简单的问题入手,逐步提高难度。
小明按照老师的方法,开始从简单的问题入手。
他先做了几个简单的题目,然后逐渐增加了难度。
经过一番努力,他终于解决了那道难题。
他高兴地笑了,觉得自己的努力没有白费。
从那以后,小明变得更加自信了。
他明白了,只要付出努力,就一定能够克服困难,取得成功。
1. 请简要概括小明是如何解决那道难题的。
(2分)2. 小明在解决难题的过程中,表现出了哪些品质?(3分)3. 这篇文章给我们的启示是什么?(3分)三、古诗文阅读(每题5分,共20分)阅读下面的古诗文,回答问题。
2024届江苏省启东市南苑中学中考数学仿真试卷含解析
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2024学年江苏省启东市南苑中学中考数学仿真试卷注意事项:1.答题前,考生先将自己的姓名、准考证号填写清楚,将条形码准确粘贴在考生信息条形码粘贴区。
2.选择题必须使用2B铅笔填涂;非选择题必须使用0.5毫米黑色字迹的签字笔书写,字体工整、笔迹清楚。
3.请按照题号顺序在各题目的答题区域内作答,超出答题区域书写的答案无效;在草稿纸、试题卷上答题无效。
4.保持卡面清洁,不要折叠,不要弄破、弄皱,不准使用涂改液、修正带、刮纸刀。
一、选择题(共10小题,每小题3分,共30分)1.如图所示,在方格纸上建立的平面直角坐标系中,将△ABC绕点O按顺时针方向旋转90°,得到△A′B′O,则点A′的坐标为()A.(3 ,1)B.(3 ,2)C.(2 ,3)D.(1 ,3)2.如图,正方形ABCD的边长为2,其面积标记为S1,以CD为斜边作等腰直角三角形,以该等腰直角三角形的一条直角边为边向外作正方形,其面积标记为S2,…,按照此规律继续下去,则S9的值为()A.(12)6B.(12)7C.(22)6D.(22)73.如图,△ABC是⊙O的内接三角形,AD⊥BC于D点,且AC=5,CD=3,BD=4,则⊙O的直径等于()A.5B.C.D.74.某人想沿着梯子爬上高4米的房顶,梯子的倾斜角(梯子与地面的夹角)不能大于,否则就有危险,那么梯子的长至少为()A.8米B.米C.米D.米5.方程(2)0x x+=的根是()A.x=2 B.x=0 C.x1=0,x2=-2 D.x1=0,x2=26.已知A(x1,y1),B(x2,y2)是反比例函数y=(k≠0)图象上的两个点,当x1<x2<0时,y1>y2,那么一次函数y=kx -k的图象不经过()A.第一象限B.第二象限C.第三象限D.第四象限7.石墨烯是现在世界上最薄的纳米材料,其理论厚度仅是0.00000000034m,这个数用科学记数法表示正确的是()A.3.4×10-9m B.0.34×10-9m C.3.4×10-10m D.3.4×10-11m8.如果一次函数y=kx+b(k、b是常数,k≠0)的图象经过第一、二、四象限,那么k、b应满足的条件是()A.k>0,且b>0 B.k<0,且b>0 C.k>0,且b<0 D.k<0,且b<09.如图,在菱形ABCD中,M,N分别在AB,CD上,且AM=CN,MN与AC交于点O,连接BO.若∠DAC=26°,则∠OBC的度数为()A.54°B.64°C.74°D.26°10.下列运算结果正确的是()A.3a﹣a=2 B.(a﹣b)2=a2﹣b2C.a(a+b)=a2+b D.6ab2÷2ab=3b二、填空题(本大题共6个小题,每小题3分,共18分)11.点(a-1,y1)、(a+1,y2)在反比例函数y=kx(k>0)的图象上,若y1<y2,则a的范围是________.12.若一个扇形的圆心角为60°,面积为6π,则这个扇形的半径为__________.13.如图,某数学兴趣小组为了测量河对岸l1的两棵古树A、B之间的距离,他们在河这边沿着与AB平行的直线l2上取C、D两点,测得∠ACB=15°,∠ACD=45°,若l1、l2之间的距离为50m,则古树A、B之间的距离为_____m.14.如图,已知圆锥的母线SA 的长为4,底面半径OA 的长为2,则圆锥的侧面积等于.15.正多边形的一个外角是72o,则这个多边形的内角和的度数是___________________.16.甲乙两人进行飞镖比赛,每人各投5次,所得平均环数相等,其中甲所得环数的方差为15,乙所得环数如下:0,1,5,9,10,那么成绩较稳定的是_____(填“甲”或“乙”).三、解答题(共8题,共72分)17.(8分)如图1,在Rt△ABC中,∠C=90°,AC=BC=2,点D、E分别在边AC、AB上,AD=DE=12AB,连接DE.将△ADE绕点A逆时针方向旋转,记旋转角为θ.(1)问题发现①当θ=0°时,BECD= ;②当θ=180°时,BECD= .(2)拓展探究试判断:当0°≤θ<360°时,BECD的大小有无变化?请仅就图2的情形给出证明;(3)问题解决①在旋转过程中,BE的最大值为;②当△ADE旋转至B、D、E三点共线时,线段CD的长为.18.(8分)解不等式组12342xx+>⎧⎨-≤⎩①②,请结合题意填空,完成本题的解答.(1)解不等式①,得_____;(2)解不等式②,得_____;(3)把不等式①和②的解集在数轴上表示出来;(4)原不等式组的解集为_____.19.(8分)综合与实践﹣﹣旋转中的数学问题背景:在一次综合实践活动课上,同学们以两个矩形为对象,研究相似矩形旋转中的问题:已知矩形ABCD∽矩形A′B′C′D′,它们各自对角线的交点重合于点O,连接AA′,CC′.请你帮他们解决下列问题:观察发现:(1)如图1,若A′B′∥AB,则AA′与CC′的数量关系是______;操作探究:(2)将图1中的矩形ABCD保持不动,矩形A′B′C′D′绕点O逆时针旋转角度α(0°<α≤90°),如图2,在矩形A′B′C′D′旋转的过程中,(1)中的结论还成立吗?若成立,请证明;若不成立,请说明理由;操作计算:(3)如图3,在(2)的条件下,当矩形A′B′C′D′绕点O旋转至AA′⊥A′D′时,若AB=6,BC=8,A′B′=3,求AA′的长.20.(8分)如图,⊙O是△ABC的外接圆,FH是⊙O的切线,切点为F,FH∥BC,连结AF交BC于E,∠ABC 的平分线BD交AF于D,连结BF.(1)证明:AF平分∠BAC;(2)证明:BF=FD;(3)若EF=4,DE=3,求AD 的长.21.(8分)计算:﹣(﹣2)2+|﹣3|﹣20180×32722.(10分)在数学实践活动课上,老师带领同学们到附近的湿地公园测量园内雕塑的高度.用测角仪在A 处测得雕塑顶端点C′的仰角为30°,再往雕塑方向前进4米至B 处,测得仰角为45°.问:该雕塑有多高?(测角仪高度忽略不计,结果不取近似值.)23.(12分)如图,直线11y k x b =+与第一象限的一支双曲线m y x=交于A 、B 两点,A 在B 的左边. (1)若1b =4,B(3,1),求直线及双曲线的解析式:并直接写出不等式11m k x b x <+的解集; (2)若A(1,3),第三象限的双曲线上有一点C,接AC 、BC,设直线BC 解析式为y kx b =+;当AC ⊥AB 时,求证:k 为定值.24.如图,小巷左石两侧是竖直的墙,一架梯子斜靠在左墙时,梯子底端到左墙角的距离BC 为0.7米,梯子顶端到地面的距离AC 为2.4米,如果保持梯子底端位置不动,将梯子斜靠在右墙时,梯子顶端到地面的距离A ′D 为1.5米,求小巷有多宽.参考答案一、选择题(共10小题,每小题3分,共30分)1、D【解题分析】解决本题抓住旋转的三要素:旋转中心O,旋转方向顺时针,旋转角度90°,通过画图得A′.【题目详解】由图知A点的坐标为(-3,1),根据旋转中心O,旋转方向顺时针,旋转角度90°,画图,从而得A′点坐标为(1,3).故选D.2、A【解题分析】试题分析:如图所示.∵正方形ABCD的边长为2,△CDE为等腰直角三角形,∴DE2+CE2=CD2,DE=CE,∴S2+S2=S1.观察发现规律:S1=22=4,S2=12S1=2,S2=12S2=1,S4=12S2=12,…,由此可得S n=(12)n﹣2.当n=9时,S9=(12)9﹣2=(12)6,故选A.考点:勾股定理.3、A【解题分析】连接AO并延长到E,连接BE.设AE=2R,则∠ABE=90°,∠AEB=∠ACB,∠ADC=90°,利用勾股定理求得AD=,,再证明Rt△ABE∽Rt△ADC,得到,即2R==.【题目详解】解:如图,连接AO并延长到E,连接BE.设AE=2R,则∠ABE=90°,∠AEB=∠ACB;∵AD⊥BC于D点,AC=5,DC=3,∴∠ADC=90°,∴AD=,∴在Rt△ABE与Rt△ADC中,∠ABE=∠ADC=90°,∠AEB=∠ACB,∴Rt△ABE∽Rt△ADC,∴,即2R==;∴⊙O的直径等于.故答案选:A.【题目点拨】本题主要考查了圆周角定理、勾股定理,解题的关键是掌握辅助线的作法.4、C【解题分析】此题考查的是解直角三角形如图:AC=4,AC⊥BC,∵梯子的倾斜角(梯子与地面的夹角)不能>60°.∴∠ABC≤60°,最大角为60°.即梯子的长至少为米,故选C.5、C【解题分析】 试题解析:x (x+1)=0,⇒x=0或x+1=0,解得x 1=0,x 1=-1.故选C .6、B【解题分析】试题分析:当x 1<x 2<0时,y 1>y 2,可判定k >0,所以﹣k <0,即可判定一次函数y=kx ﹣k 的图象经过第一、三、四象限,所以不经过第二象限,故答案选B .考点:反比例函数图象上点的坐标特征;一次函数图象与系数的关系.7、C【解题分析】试题分析:根据科学记数法的概念可知:用科学记数法可将一个数表示10n a ⨯的形式,所以将1.11111111134用科学记数法表示103.410-⨯,故选C .考点:科学记数法8、B【解题分析】试题分析:∵一次函数y=kx+b (k 、b 是常数,k≠0)的图象经过第一、二、四象限,∴k <0,b >0,故选B .考点:一次函数的性质和图象9、B【解题分析】根据菱形的性质以及AM =CN ,利用ASA 可得△AMO ≌△CNO ,可得AO =CO ,然后可得BO ⊥AC ,继而可求得∠OBC 的度数.【题目详解】∵四边形ABCD 为菱形,∴AB ∥CD ,AB =BC ,∴∠MAO =∠NCO ,∠AMO =∠CNO ,在△AMO 和△CNO 中,MAO NCO AM CNAMO CNO ∠=∠⎧⎪=⎨⎪∠=∠⎩, ∴△AMO ≌△CNO(ASA),∴AO =CO ,∵AB =BC ,∴BO ⊥AC ,∴∠BOC =90°,∵∠DAC =26°,∴∠BCA =∠DAC =26°,∴∠OBC =90°﹣26°=64°.故选B .【题目点拨】本题考查了菱形的性质和全等三角形的判定和性质,注意掌握菱形对边平行以及对角线相互垂直的性质.10、D【解题分析】各项计算得到结果,即可作出判断.【题目详解】解:A 、原式=2a ,不符合题意;B 、原式=a 2-2ab+b 2,不符合题意;C 、原式=a 2+ab ,不符合题意;D 、原式=3b ,符合题意;故选D【题目点拨】此题考查了整式的混合运算,熟练掌握运算法则是解本题的关键.二、填空题(本大题共6个小题,每小题3分,共18分)11、﹣1<a <1【解题分析】解:∵k >0,∴在图象的每一支上,y 随x 的增大而减小,①当点(a-1,y 1)、(a+1,y 2)在图象的同一支上,∵y 1<y 2,∴a-1>a+1,解得:无解;②当点(a-1,y 1)、(a+1,y 2)在图象的两支上,∵y 1<y 2,∴a-1<0,a+1>0,解得:-1<a <1.故答案为:-1<a <1.【题目点拨】本题考查反比例函数的性质.12、6【解题分析】设这个扇形的半径为r ,根据题意可得:2606360r ππ=,解得:6r =. 故答案为6.13、(50﹣5033). 【解题分析】过点A 作AM ⊥DC 于点M ,过点B 作BN ⊥DC 于点N .则AM =BN .通过解直角△ACM 和△BCN 分别求得CM 、CN 的长度,则易得MN =AB .【题目详解】解:如图,过点A 作AM ⊥DC 于点M ,过点B 作BN ⊥DC 于点N ,则AB =MN ,AM =BN .在直角△ACM ,∵∠ACM =45°,AM =50m ,∴CM =AM =50m .∵在直角△BCN 中,∠BCN =∠ACB +∠ACD =60°,BN =50m ,∴CN =60BN tan 3(m ),∴MN =CM−CN =50−3(m ).则AB =MN =()m .故答案是:(). 【题目点拨】 本题考查了解直角三角形的应用.解决此问题的关键在于正确理解题意的基础上建立数学模型,把实际问题转化为数学问题.14、8π【解题分析】圆锥的侧面积就等于母线长乘底面周长的一半.依此公式计算即可.【题目详解】侧面积=4×4π÷2=8π.故答案为8π.【题目点拨】本题主要考查了圆锥的计算,正确理解圆锥的侧面积的计算可以转化为扇形的面积的计算,理解圆锥与展开图之间的关系.15、540°【解题分析】根据多边形的外角和为360°,因此可以求出多边形的边数为360°÷72°=5,根据多边形的内角和公式(n-2)·180°,可得(5-2)×180°=540°.考点:多边形的内角和与外角和16、甲.【解题分析】乙所得环数的平均数为:0159105++++=5, S 2=1n[21x x (-)+22x x (-)+23x x (-)+…+2n x x (-)] =15[205(-)+215(-)+255(-)+295(-)+2105(-)] =16.4,甲的方差<乙的方差,所以甲较稳定.故答案为甲.点睛:要比较成绩稳定即比方差大小,方差越大,越不稳定;方差越小,越稳定.三、解答题(共8题,共72分)17、(1(2)无变化,证明见解析;(3)①+2+1﹣1.【解题分析】(1)①先判断出DE ∥CB ,进而得出比例式,代值即可得出结论;②先得出DE ∥BC ,即可得出,AE AD AB AC=,再用比例的性质即可得出结论;(2)先∠CAD =∠BAE ,进而判断出△ADC ∽△AEB 即可得出结论;(3)分点D 在BE 的延长线上和点D 在BE 上,先利用勾股定理求出BD ,再借助(2)结论即可得出CD .【题目详解】解:(1)①当θ=0°时,在Rt △ABC 中,AC=BC=2,∴∠A=∠B=45°,,∵AD=DE=12, ∴∠AED=∠A=45°,∴∠ADE=90°,∴DE ∥CB , ∴CD BE AC AB=, ∴2CD =,∴BE CD =,,②当θ=180°时,如图1,∵DE∥BC,∴AE AD AB AC=,∴AE AB AD AC AB AC++=,即:BE CD AB AC=,∴222 BE ABCD AC===2;(2)当0°≤θ<360°时,BECD的大小没有变化,理由:∵∠CAB=∠DAE,∴∠CAD=∠BAE,∵AD AE AC AB=,∴△ADC∽△AEB,∴2222BE ABCD AC==(3)①当点E在BA的延长线时,BE最大,在Rt△ADE中,2AD=2,∴BE最大2+2;②如图2,当点E 在BD 上时,∵∠ADE=90°,∴∠ADB=90°,在Rt △ADB 中,AB=22,AD=2,根据勾股定理得,BD=22-AB AD =6,∴BE=BD+DE=6+2,由(2)知,2BE CD=, ∴CD=62322BE +==+1, 如图3,当点D 在BE 的延长线上时,在Rt △ADB 中,2,2,根据勾股定理得,22-AB AD 6,∴BE=BD ﹣62,由(2)知,2BE CD=, ∴62322-==1. 3+131.【题目点拨】此题是相似形综合题,主要考查了等腰直角三角形的性质和判定,勾股定理,相似三角形的判定和性质,比例的基本性质及分类讨论的数学思想,解(1)的关键是得出DE∥BC,解(2)的关键是判断出△ADC∽△AEB,解(3)关键是作出图形求出BD,是一道中等难度的题目.18、(1)x>1;(1)x≤1;(3)答案见解析;(4)1<x≤1.【解题分析】根据一元一次不等式的解法分别解出两个不等式,根据不等式的解集的确定方法得到不等式组的解集.【题目详解】解:(1)解不等式①,得x>1;(1)解不等式②,得x≤1;(3)把不等式①和②的解集在数轴上表示出来:(4)原不等式组的解集为:1<x≤1.【题目点拨】本题考查了一元一次不等式组的解法,掌握确定解集的规律:同大取大;同小取小;大小小大中间找;大大小小找不到是解题的关键.19、(1)AA′=CC′;(2)成立,证明见解析;(3)AA′=22132【解题分析】(1)连接AC、A′C′,根据题意得到点A、A′、C′、C在同一条直线上,根据矩形的性质得到OA=OC,OA′=OC′,得到答案;(2)连接AC、A′C′,证明△A′OA≌△C′OC,根据全等三角形的性质证明;(3)连接AC,过C作CE⊥AB′,交AB′的延长线于E,根据相似多边形的性质求出B′C′,根据勾股定理计算即可.【题目详解】(1)AA′=CC′,理由如下:连接AC、A′C′,∵矩形ABCD∽矩形A′B′C′D′,∠CAB=∠C′A′B′,∴点A 、A′、C′、C 在同一条直线上,由矩形的性质可知,OA=OC ,OA ′=OC′,∴AA′=CC′,故答案为A A′=CC′;(2)(1)中的结论还成立,AA′=CC′,理由如下:连接AC 、A′C′,则AC 、A′C′都经过点O ,由旋转的性质可知,∠A′OA=∠C′OC ,∵四边形ABCD 和四边形A′B′C′D′都是矩形,∴OA=OC ,OA′=OC′,在△A′OA 和△C′OC 中,{OA OCA OA C OC OA OC =∠=∠'=''',∴△A′OA ≌△C′OC ,∴AA′=CC′;(3)连接AC ,过C 作CE ⊥AB′,交AB′的延长线于E ,∵矩形ABCD ∽矩形A′B′C′D′, ∴AB BC A B B C ='''',即683B C ='', 解得,B′C′=4,∵∠EB′C=∠B′C′C=∠E=90°,∴四边形B′ECC′为矩形,在Rt△ABC中,AC=22AB BC+=10,在Rt△AEC中,AE=22AC CE-=221,∴AA′+B′E=221﹣3,又AA′=CC′=B′E,∴AA′=22132-.【题目点拨】本题考查的是矩形的性质、旋转变换的性质、全等三角形的判定和性质,掌握旋转变换的性质、矩形的性质是解题的关键.20、【小题1】见解析【小题2】见解析【小题3】【解题分析】证明:(1)连接OF∴FH切·O于点F∴OF⊥FH ………………………… 1分∵BC | | FH∴OF⊥BC ………………………… 2分∴BF="CF" ………………………… 3分∴∠BAF=∠CAF即AF平分∠BAC…………………4分(2)∵∠CAF=∠CBF又∠CAF=∠BAF∴∠CBF=∠BAF ………………………… 6分∵BD平分∠ABC∴∠ABD=∠CBD∴∠BAF+∠ABD=∠CBF+∠CBD即∠FBD=∠FDB………………………… 7分∴BF="DF" ………………………… 8分(3)∵∠BFE=∠AFB ∠FBE=∠FAB∴ΔBEF∽ΔABF………………………… 9分∴即BF2=EF·AF …………………… 10分∵EF=4 DE=3 ∴BF="DF" =4+3=7AF=AD+7即4(AD+7)=49 解得AD=21、﹣1【解题分析】根据乘方的意义、绝对值的性质、零指数幂的性质及立方根的定义依次计算各项后,再根据有理数的运算法则进行计算即可.【题目详解】原式=﹣1+3﹣1×3=﹣1.【题目点拨】本题考查了乘方的意义、绝对值的性质、零指数幂的性质、立方根的定义及有理数的混合运算,熟知乘方的意义、绝对值的性质、零指数幂的性质、立方根的定义及有理数的混合运算顺序是解决问题的关键.22、该雕塑的高度为(2+23)米.【解题分析】过点C作CD⊥AB,设CD=x,由∠CBD=45°知BD=CD=x米,根据tanA=CDAD列出关于x的方程,解之可得.【题目详解】解:如图,过点C作CD⊥AB,交AB延长线于点D,设CD=x米,∵∠CBD=45°,∠BDC=90°,∴BD=CD=x米,∵∠A=30°,AD=AB+BD=4+x,∴tanA=CD AD,即4x x=+, 解得:答:该雕塑的高度为(【题目点拨】本题主要考查解直角三角形的应用-仰角俯角问题,解题的关键是根据题意构建直角三角形,并熟练掌握三角函数的应用.23、 (1) 1<x <3或x <0;(2)证明见解析.【解题分析】(1)将B (3,1)代入m y x=,将B (3,1)代入14y k x =+,即可求出解析式; 再根据图像直接写出不等式11m k x b x +<的解集;(2)过A 作l ∥x 轴,过C 作CG ⊥l 于G ,过B 作BH ⊥l 于H , △AGC ∽△BHA , 设B (m , 3m )、C (n , 3n ),根据对应线段成比例即可得出mn =-9,联立3y kx b y x =+⎧⎪⎨=⎪⎩,得2230k x bx +-=,根据根与系数的关系得39mn k -==-,由此得出13k =为定值. 【题目详解】解:(1)将B (3,1)代入m y x =, ∴m=3, 3y x=, 将B (3,1)代入14y k x =+,∴1341k +=,11k =-,∴4y x =-+, ∴不等式11m k x b x+<的解集为1<x <3或x <0 (2)过A 作l ∥x 轴,过C 作CG ⊥l 于G ,过B 作BH ⊥l 于H ,则△AGC ∽△BHA ,设B (m ,3m )、C (n , 3n), ∵AG BH CG AH =,∴331313n m m n --=--, ∴131113m n m n m n-⋅-=--⋅, ∴ 3131m n =-, ∴mn =-9,联立∴3y kx b y x =+⎧⎪⎨=⎪⎩, ∴2230k x bx +-=∴39mn k -==-, ∴13k =为定值.【题目点拨】此题主要考查反比例函数的图像与性质,解题的关键是根据题意作出辅助线,再根据反比例函数的性质进行求解.24、2.7米.【解题分析】先根据勾股定理求出AB 的长,同理可得出BD 的长,进而可得出结论.【题目详解】在Rt △ACB 中,∵∠ACB =90°,BC =0.7米,AC =2.2米,∴AB 2=0.72+2.22=6.1.在Rt △A′BD 中,∵∠A′DB =90°,A′D =1.5米,BD 2+A′D 2=A′B′2,∴BD2+1.52=6.1,∴BD2=2.∵BD>0,∴BD=2米.∴CD=BC+BD=0.7+2=2.7米.答:小巷的宽度CD为2.7米.【题目点拨】本题考查的是勾股定理的应用,在应用勾股定理解决实际问题时勾股定理与方程的结合是解决实际问题常用的方法,关键是从题中抽象出勾股定理这一数学模型,画出准确的示意图.领会数形结合的思想的应用.。
2024届江苏省南通市启东市达标名校中考数学模拟试题含解析
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2024学年江苏省南通市启东市达标名校中考数学模拟试题注意事项1.考试结束后,请将本试卷和答题卡一并交回.2.答题前,请务必将自己的姓名、准考证号用0.5毫米黑色墨水的签字笔填写在试卷及答题卡的规定位置. 3.请认真核对监考员在答题卡上所粘贴的条形码上的姓名、准考证号与本人是否相符.4.作答选择题,必须用2B 铅笔将答题卡上对应选项的方框涂满、涂黑;如需改动,请用橡皮擦干净后,再选涂其他答案.作答非选择题,必须用05毫米黑色墨水的签字笔在答题卡上的指定位置作答,在其他位置作答一律无效. 5.如需作图,须用2B 铅笔绘、写清楚,线条、符号等须加黑、加粗.一、选择题(共10小题,每小题3分,共30分)1.如图,在矩形纸片ABCD 中,已知AB =3,BC =1,点E 在边CD 上移动,连接AE ,将多边形ABCE 沿直线A E 折叠,得到多边形A FGE ,点B 、C 的对应点分别为点F 、G .在点E 从点C 移动到点D 的过程中,则点F 运动的路径长为( )A .πB .3πC .33π D .233π 2.如图,一圆弧过方格的格点A 、B 、C ,在方格中建立平面直角坐标系,使点A 的坐标为(﹣3,2),则该圆弧所在圆心坐标是( )A .(0,0)B .(﹣2,1)C .(﹣2,﹣1)D .(0,﹣1)3.春季是传染病多发的季节,积极预防传染病是学校高度重视的一项工作,为此,某校对学生宿舍采取喷洒药物进行消毒.在对某宿舍进行消毒的过程中,先经过5min 的集中药物喷洒,再封闭宿舍10min ,然后打开门窗进行通风,室内每立方米空气中含药量3(/)y mg m 与药物在空气中的持续时间(min)x 之间的函数关系,在打开门窗通风前分别满足两个一次函数,在通风后又成反比例,如图所示.下面四个选项中错误的是( )A .经过5min 集中喷洒药物,室内空气中的含药量最高达到310/mg mB .室内空气中的含药量不低于38/mg m 的持续时间达到了11minC .当室内空气中的含药量不低于35/mg m 且持续时间不低于35分钟,才能有效杀灭某种传染病毒.此次消毒完全有效D .当室内空气中的含药量低于32/mg m 时,对人体才是安全的,所以从室内空气中的含药量达到32/mg m 开始,需经过59min 后,学生才能进入室内4.如图,小明从A 处出发沿北偏西30°方向行走至B 处,又沿南偏西50°方向行走至C 处,此时再沿与出发时一致的方向行走至D 处,则∠BCD 的度数为( )A .100°B .80°C .50°D .20°5.下列长度的三条线段能组成三角形的是 A .2,3,5 B .7,4,2 C .3,4,8D .3,3,46.如图,数轴上表示的是下列哪个不等式组的解集( )A .53x x ≥-⎧⎨>-⎩B .53x x >-⎧⎨≥-⎩C .53x x <⎧⎨<-⎩D .53x x <⎧⎨>-⎩7.计算a•a 2的结果是( ) A .a B .a 2 C .2a 2 D .a 38.有6个相同的立方体搭成的几何体如图所示,则它的主视图是( )A .B .C .D .9.某区10名学生参加市级汉字听写大赛,他们得分情况如上表:那么这10名学生所得分数的平均数和众数分别是( ) 人数 3 4 2 1 分数 8085 90 95A .85和82.5B .85.5和85C .85和85D .85.5和8010.如图,在▱ABCD 中,AB=6,AD=9,∠BAD 的平分线交BC 于点E ,交DC 的延长线于点F ,BG ⊥AE ,垂足为G ,若BG=42,则△CEF 的面积是( )A .22B .2C .32D .42二、填空题(本大题共6个小题,每小题3分,共18分)11.因式分解:223x 6xy 3y -+- =12.如图,正方形ABCD 中,M 为BC 上一点,ME ⊥AM ,ME 交AD 的延长线于点E. 若AB=12,BM=5,则DE 的长为_________.13.⊙M 的圆心在一次函数y=12x+2图象上,半径为1.当⊙M 与y 轴相切时,点M 的坐标为_____.14.已知α是锐角1sin 2α=,那么cos α=_________. 15.如图,某小型水库栏水坝的横断面是四边形ABCD ,DC ∥AB ,测得迎水坡的坡角α=30°,已知背水坡的坡比为1.2:1,坝顶部DC宽为2m,坝高为6m,则坝底AB的长为_____m.16.分解因式:2x2﹣8xy+8y2= .三、解答题(共8题,共72分)17.(8分)如图,在平面直角坐标系中,函数的图象经过点,直线与x轴交于点.求的值;过第二象限的点作平行于x轴的直线,交直线于点C,交函数的图象于点D.①当时,判断线段PD与PC的数量关系,并说明理由;②若,结合函数的图象,直接写出n的取值范围.18.(8分)据报道,“国际剪刀石头布协会”提议将“剪刀石头布”作为奥运会比赛项目.某校学生会想知道学生对这个提议的了解程度,随机抽取部分学生进行了一次问卷调查,并根据收集到的信息进行了统计,绘制了下面两幅尚不完整的统计图.请你根据统计图中所提供的信息解答下列问题:(1)接受问卷调查的学生共有___名,扇形统计图中“基本了解”部分所对应扇形的圆心角为___;请补全条形统计图;(2)若该校共有学生900人,请根据上述调查结果,估计该校学生中对将“剪刀石头布”作为奥运会比赛项目的提议达到“了解”和“基本了解”程度的总人数;(3)“剪刀石头布”比赛时双方每次任意出“剪刀”、“石头”、“布”这三种手势中的一种,规则为:剪刀胜布,布胜石头,石头胜剪刀,若双方出现相同手势,则算打平.若小刚和小明两人只比赛一局,请用树状图或列表法求两人打平的概率.19.(8分)如图,△ABC中AB=AC,请你利用尺规在BC边上求一点P,使△ABC~△PAC不写画法,(保留作图痕迹).20.(8分)如图①,一次函数y=12x﹣2的图象交x轴于点A,交y轴于点B,二次函数y=12x2+bx+c的图象经过A、B两点,与x轴交于另一点C.(1)求二次函数的关系式及点C的坐标;(2)如图②,若点P是直线AB上方的抛物线上一点,过点P作PD∥x轴交AB于点D,PE∥y轴交AB于点E,求PD+PE的最大值;(3)如图③,若点M在抛物线的对称轴上,且∠AMB=∠ACB,求出所有满足条件的点M的坐标.21.(8分)综合与实践﹣﹣旋转中的数学问题背景:在一次综合实践活动课上,同学们以两个矩形为对象,研究相似矩形旋转中的问题:已知矩形ABCD∽矩形A′B′C′D′,它们各自对角线的交点重合于点O,连接AA′,CC′.请你帮他们解决下列问题:观察发现:(1)如图1,若A′B′∥AB,则AA′与CC′的数量关系是______;操作探究:(2)将图1中的矩形ABCD保持不动,矩形A′B′C′D′绕点O逆时针旋转角度α(0°<α≤90°),如图2,在矩形A′B′C′D′旋转的过程中,(1)中的结论还成立吗?若成立,请证明;若不成立,请说明理由;操作计算:(3)如图3,在(2)的条件下,当矩形A′B′C′D′绕点O旋转至AA′⊥A′D′时,若AB=6,BC=8,A′B′=3,求AA′的长.22.(10分)计算:(13)-1+(332)0+27-2cos30°.23.(12分)4件同型号的产品中,有1件不合格品和3件合格品.从这4件产品中随机抽取1件进行检测,求抽到的是不合格品的概率;从这4件产品中随机抽取2件进行检测,求抽到的都是合格品的概率;在这4件产品中加入x件合格品后,进行如下试验:随机抽取1件进行检测,然后放回,多次重复这个试验,通过大量重复试验后发现,抽到合格品的频率稳定在0.95,则可以推算出x的值大约是多少?24.甲、乙两人在玩转盘游戏时,把两个可以自由转动的转盘A,B都分成3等份的扇形区域,并在每一小区域内标上数字(如图所示),游戏规则:同时转动两个转盘,当转盘停止后,若指针所指两个区域的数字之和为3的倍数,则甲获胜;若指针所指两个区域的数字之和为4的倍数,则乙获胜.如果指针落在分割线上,则需要重新转动转盘.请问这个游戏对甲、乙双方公平吗?说明理由.参考答案一、选择题(共10小题,每小题3分,共30分)1、D【解题分析】点F的运动路径的长为弧FF'的长,求出圆心角、半径即可解决问题.【题目详解】如图,点F的运动路径的长为弧FF'的长,在Rt△ABC中,∵tan∠BAC=1333BCAB==,∴∠BAC=30°,∵∠CAF=∠BAC=30°,∴∠BAF=60°,∴∠FAF′=120°,∴弧FF'的长=1203231803ππ⨯=.故选D.【题目点拨】本题考查了矩形的性质、特殊角的三角函数值、含30°角的直角三角形的性质、弧长公式等知识,解题的关键是判断出点F运动的路径.2、C【解题分析】如图:分别作AC与AB的垂直平分线,相交于点O,则点O即是该圆弧所在圆的圆心.∵点A的坐标为(﹣3,2),∴点O的坐标为(﹣2,﹣1).故选C.3、C【解题分析】利用图中信息一一判断即可.【题目详解】解: A、正确.不符合题意.B、由题意x=4时,y=8,∴室内空气中的含药量不低于8mg/m3的持续时间达到了11min,正确,不符合题意;C、y=5时,x=2.5或24,24-2.5=21.5<35,故本选项错误,符合题意;D、正确.不符合题意,故选C.【题目点拨】本题考查反比例函数的应用、一次函数的应用等知识,解题的关键是读懂图象信息,属于中考常考题型.4、B【解题分析】解:如图所示:由题意可得:∠1=30°,∠3=50°,则∠2=30°,故由DC∥AB,则∠4=30°+50°=80°.故选B.点睛:此题主要考查了方向角的定义,正确把握定义得出∠3的度数是解题关键.5、D【解题分析】试题解析:A.∵3+2=5,∴2,3,5不能组成三角形,故A错误;B.∵4+2<7,∴7,4,2不能组成三角形,故B错误;C.∵4+3<8,∴3,4,8不能组成三角形,故C错误;D.∵3+3>4,∴3,3,4能组成三角形,故D正确;故选D.6、B【解题分析】根据数轴上不等式解集的表示方法得出此不等式组的解集,再对各选项进行逐一判断即可.【题目详解】解:由数轴上不等式解集的表示方法得出此不等式组的解集为:x≥-3,A、不等式组53xx≥-⎧⎨>-⎩的解集为x>-3,故A错误;B、不等式组53xx>-⎧⎨≥-⎩的解集为x≥-3,故B正确;C、不等式组53xx<⎧⎨<-⎩的解集为x<-3,故C错误;D、不等式组53xx<⎧⎨>-⎩的解集为-3<x<5,故D错误.故选B.【题目点拨】本题考查的是在数轴上表示一元一次不等式组的解集,根据题意得出数轴上不等式组的解集是解答此题的关键.7、D【解题分析】a·a2= a3.故选D.8、C【解题分析】试题分析:根据主视图是从正面看得到的图形,可得答案.解:从正面看第一层三个小正方形,第二层左边一个小正方形,右边一个小正方形.故选C.考点:简单组合体的三视图.9、B【解题分析】根据众数及平均数的定义,即可得出答案.【题目详解】解:这组数据中85出现的次数最多,故众数是85;平均数=110(80×3+85×4+90×2+95×1)=85.5.故选:B.【题目点拨】本题考查了众数及平均数的知识,掌握各部分的概念是解题关键.10、A【解题分析】解:∵AE平分∠BAD,∴∠DAE=∠BAE;又∵四边形ABCD是平行四边形,∴AD∥BC,∴∠BEA=∠DAE=∠BAE,∴AB=BE=6,∵BG⊥AE,垂足为G,∴AE=2AG.在Rt△ABG中,∵∠AGB=90°,AB=6,BG=42,∴AG=22AB BG-=2,∴AE=2AG=4;∴S△ABE=12AE•BG=1442822⨯⨯=.∵BE=6,BC=AD=9,∴CE=BC﹣BE=9﹣6=3,∴BE:CE=6:3=2:1,∵AB∥FC,∴△ABE∽△FCE,∴S△ABE:S△CEF=(BE:CE)2=4:1,则S△CEF=14S△ABE=22.故选A.【题目点拨】本题考查1.相似三角形的判定与性质;2.平行四边形的性质,综合性较强,掌握相关性质定理正确推理论证是解题关键.二、填空题(本大题共6个小题,每小题3分,共18分)11、﹣3(x﹣y)1【解题分析】解:﹣3x1+6xy﹣3y1=﹣3(x1+y1﹣1xy)=﹣3(x﹣y)1.故答案为:﹣3(x﹣y)1.点睛:本题考查了提公因式法,公式法分解因式,提取公因式后利用完全平方公式进行二次分解,注意分解要彻底.12、109 5【解题分析】由勾股定理可先求得AM,利用条件可证得△ABM∽△EMA,则可求得AE的长,进一步可求得DE.【题目详解】详解:∵正方形ABCD,∴∠B=90°.∵AB=12,BM=5,∴AM=1.∵ME⊥AM,∴∠AME=90°=∠B.∵∠BAE=90°,∴∠BAM+∠MAE=∠MAE+∠E,∴∠BAM=∠E,∴△ABM∽△EMA,∴BMAM=AMAE,即513=13AE,∴AE=1695,∴DE=AE﹣AD=1695﹣12=1095.故答案为1095.【题目点拨】本题主要考查相似三角形的判定和性质,利用条件证得△ABM∽△EMA是解题的关键.13、(1,52)或(﹣1,32)【解题分析】设当⊙M与y轴相切时圆心M的坐标为(x,12x+2),再根据⊙M的半径为1即可得出y的值.【题目详解】解:∵⊙M 的圆心在一次函数y=12x+2的图象上运动, ∴设当⊙M 与y 轴相切时圆心M 的坐标为(x, 12x+2), ∵⊙M 的半径为1,∴x=1或x=−1,当x=1时,y=52, 当x=−1时,y=32. ∴P 点坐标为:(1, 52)或(−1, 32). 故答案为(1, 52)或(−1, 32). 【题目点拨】本题考查了切线的性质与一次函数图象上点的坐标特征,解题的关键是熟练的掌握切线的性质与一次函数图象上点的坐标特征.14、2【解题分析】根据已知条件设出直角三角形一直角边与斜边的长,再根据勾股定理求出另一直角边的长,由三角函数的定义直接解答即可.【题目详解】由sinα=a c =12知,如果设a=x ,则c=2x ,结合a 2+b 2=c 2得∴cos =bc【题目点拨】本题考查的知识点是同角三角函数的关系,解题的关键是熟练的掌握同角三角函数的关系.15、(【解题分析】过点C 作CE ⊥AB ,DF ⊥AB ,垂足分别为:E ,F ,得到两个直角三角形和一个矩形,在Rt △AEF 中利用DF 的长,求得线段AF 的长;在Rt △BCE 中利用CE 的长求得线段BE 的长,然后与AF 、EF 相加即可求得AB 的长.【题目详解】解:如图所示:过点C 作CE ⊥AB ,DF ⊥AB ,垂足分别为:E ,F ,∵坝顶部宽为2m ,坝高为6m ,∴DC=EF=2m ,EC=DF=6m ,∵α=30°,∴BE=63tan30EC =︒ (m ), ∵背水坡的坡比为1.2:1,∴ 1.2 1.21DF AF AF ==, 解得:AF=5(m ),则AB=AF+EF+BE=5+2+63=(7+63)m ,故答案为(7+63)m .【题目点拨】本题考查了解直角三角形的应用,解题的关键是利用锐角三角函数的概念和坡度的概念求解.16、1(x ﹣1y )1【解题分析】试题分析:1x 1﹣8xy+8y 1=1(x 1﹣4xy+4y 1)=1(x ﹣1y )1.故答案为:1(x ﹣1y )1.考点:提公因式法与公式法的综合运用三、解答题(共8题,共72分)17、(1).(2)①判断:.理由见解析;②或.【解题分析】(1)利用代点法可以求出参数 ;(2)①当时,即点P的坐标为,即可求出点的坐标,于是得出;②根据①中的情况,可知或再结合图像可以确定的取值范围;【题目详解】解:(1)∵函数的图象经过点,∴将点代入,即,得:∵直线与轴交于点,∴将点代入,即,得:(2)①判断:.理由如下:当时,点P的坐标为,如图所示:∴点C的坐标为,点D的坐标为∴,.∴.②由①可知当时所以由图像可知,当直线往下平移的时也符合题意,即,得;当时,点P的坐标为∴点C的坐标为,点D的坐标为∴,∴当时,即,也符合题意,所以的取值范围为:或.【题目点拨】本题主要考查了反比例函数和一次函数,熟练求反比例函数和一次函数解析式的方法、坐标与线段长度的转化和数形结合思想是解题关键.18、(1)60;90°;统计图详见解析;(2)300;(3).【解题分析】试题分析:(1)由“了解很少”的人数除以占的百分比得出学生总数,求出“基本了解”的学生占的百分比,乘以360得到结果,补全条形统计图即可;(2)求出“了解”和“基本了解”程度的百分比之和,乘以900即可得到结果;(3)列表得出所有等可能的情况数,找出两人打平的情况数,即可求出所求的概率.试题解析:(1)根据题意得:30÷50%=60(名),“了解”人数为60﹣(15+30+10)=5(名),“基本了解”占的百分比为1560×100%=25%,占的角度为25%×360°=90°, 补全条形统计图如图所示:(2)根据题意得:900×15560=300(人), 则估计该校学生中对将“剪刀石头布”作为奥运会比赛项目的提议达到“了解”和“基本了解”程度的总人数为300人; (3)列表如下:剪 石 布剪 (剪,剪) (石,剪) (布,剪)石 (剪,石) (石,石) (布,石)布 (剪,布) (石,布) (布,布)所有等可能的情况有9种,其中两人打平的情况有3种,则P=39=13. 考点:1、条形统计图,2、扇形统计图,3、列表法与树状图法19、见解析【解题分析】根据题意作∠CBA=∠CAP 即可使得△ABC ~△PAC.【题目详解】如图,作∠CBA=∠CAP ,P 点为所求.【题目点拨】此题主要考查相似三角形的尺规作图,解题的关键是作一个角与已知角相等.20、(1)二次函数的关系式为y =215222x x -+-;C (1,0);(2)当m =2时,PD +PE 有最大值3;(3)点M 的坐标为(52,12)或(52,21). 【解题分析】(1)先求出A 、B 的坐标,然后把A 、B 的坐标分别代入二次函数的解析式,解方程组即可得到结论;(2)先证明△PDE ∽△OAB ,得到PD =2PE .设P (m ,215222m m -+-),则E (m ,122m -),PD +PE =3PE ,然后配方即可得到结论.(3)分两种情况讨论:①当点M 在在直线AB 上方时,则点M 在△ABC 的外接圆上,如图1.求出圆心O 1的坐标和半径,利用MO 1=半径即可得到结论.②当点M 在在直线AB 下方时,作O 1关于AB 的对称点O 2,如图2.求出点O 2的坐标,算出DM 的长,即可得到结论.【题目详解】解:(1)令y =122x -=0,得:x =4,∴A (4,0). 令x =0,得:y =-2,∴B (0,-2).∵二次函数y =212x bx c -++的图像经过A 、B 两点, ∴8402b c c -++⎧⎨-⎩==,解得:522b c ⎧⎪⎨⎪-⎩==, ∴二次函数的关系式为y =215222x x -+-. 令y =215222x x -+-=0,解得:x =1或x =4,∴C (1,0). (2)∵PD ∥x 轴,PE ∥y 轴,∴∠PDE =∠OAB ,∠PED =∠OBA ,∴△PDE ∽△OAB .∴PD PE =OA OB =42=2,∴PD =2PE .设P (m ,215222m m -+-), 则E (m ,122m -). ∴PD +PE =3PE =3×[(215222m m -+-)-(122m -)]=2362m m -+=()23262m --+. ∵0<m <4,∴当m =2时,PD +PE 有最大值3.(3)①当点M 在在直线AB 上方时,则点M 在△ABC 的外接圆上,如图1.∵△ABC 的外接圆O 1的圆心在对称轴上,设圆心O 1的坐标为(52,-t ). ∴()22522t ⎛⎫+- ⎪⎝⎭=22512t ⎛⎫-+ ⎪⎝⎭,解得:t =2, ∴圆心O 1的坐标为(52,-2),∴半径为52. 设M (52,y ).∵MO 1=52,∴522y +=, 解得:y =12,∴点M 的坐标为(5122,). ②当点M 在在直线AB 下方时,作O 1关于AB 的对称点O 2,如图2.∵AO 1=O 1B =52,∴∠O 1AB =∠O 1BA .∵O 1B ∥x 轴,∴∠O 1BA =∠OAB , ∴∠O 1AB =∠OAB ,O 2在x 轴上,∴点O 2的坐标为 (32,0),∴O 2D =1,∴DM =2,∴点M 的坐标为(52,.综上所述:点M 的坐标为(52,12)或(52,.点睛:本题是二次函数的综合题.考查了求二次函数的解析式,求二次函数的最值,圆的有关性质.难度比较大,解答第(3)问的关键是求出△ABC外接圆的圆心坐标.21、(1)AA′=CC′;(2)成立,证明见解析;(3)AA′=22132【解题分析】(1)连接AC、A′C′,根据题意得到点A、A′、C′、C在同一条直线上,根据矩形的性质得到OA=OC,OA′=OC′,得到答案;(2)连接AC、A′C′,证明△A′OA≌△C′OC,根据全等三角形的性质证明;(3)连接AC,过C作CE⊥AB′,交AB′的延长线于E,根据相似多边形的性质求出B′C′,根据勾股定理计算即可.【题目详解】(1)AA′=CC′,理由如下:连接AC、A′C′,∵矩形ABCD∽矩形A′B′C′D′,∠CAB=∠C′A′B′,∵A′B′∥AB,∴点A、A′、C′、C在同一条直线上,由矩形的性质可知,OA=OC,OA′=OC′,∴AA′=CC′,故答案为A A′=CC′;(2)(1)中的结论还成立,AA′=CC′,理由如下:连接AC 、A′C′,则AC 、A′C′都经过点O ,由旋转的性质可知,∠A′OA=∠C′OC ,∵四边形ABCD 和四边形A′B′C′D′都是矩形,∴OA=OC ,OA′=OC′,在△A′OA 和△C′OC 中,{OA OCA OA C OC OA OC =∠=∠'=''',∴△A′OA ≌△C′OC ,∴AA′=CC′;(3)连接AC ,过C 作CE ⊥AB′,交AB′的延长线于E ,∵矩形ABCD ∽矩形A′B′C′D′, ∴AB BC A B B C ='''',即683B C ='', 解得,B′C′=4,∵∠EB′C=∠B′C′C=∠E=90°,∴四边形B′ECC′为矩形,∴EC=B′C′=4,在Rt △ABC 中,22AB BC +, 在Rt △AEC 中,22AC CE -21,∴213,又AA′=CC′=B′E ,∴AA′=22132.【题目点拨】本题考查的是矩形的性质、旋转变换的性质、全等三角形的判定和性质,掌握旋转变换的性质、矩形的性质是解题的关键.22、4+23.【解题分析】原式第一项利用负指数幂法则计算,第二项利用零指数幂法则计算,第三项化为最简二次根式,最后一项利用特殊角的三角函数值计算即可得到结果.【题目详解】原式=3+1+33-2×3 2=4+23.23、(1)14;(2)12;(3)x=1.【解题分析】(1)用不合格品的数量除以总量即可求得抽到不合格品的概率;(2)利用独立事件同时发生的概率等于两个独立事件单独发生的概率的积即可计算;(3)根据频率估计出概率,利用概率公式列式计算即可求得x的值.【题目详解】解:(1)∵4件同型号的产品中,有1件不合格品,∴P(不合格品)=14;(2)共有12种情况,抽到的都是合格品的情况有6种,P(抽到的都是合格品)=612=12;(3)∵大量重复试验后发现,抽到合格品的频率稳定在0.95,∴抽到合格品的概率等于0.95,∴34xx++=0.95,解得:x=1.【题目点拨】本题考查利用频率估计概率;概率公式;列表法与树状图法.24、见解析【解题分析】解:不公平,理由如下:列表得:由表可知共有9种等可能的结果,其中数字之和为3的倍数的有3种结果,数字之和为4的倍数的有2种,则甲获胜的概率为3193=、乙获胜的概率为29,∵12 39≠,∴这个游戏对甲、乙双方不公平.【题目点拨】考查的是游戏公平性的判断.判断游戏公平性就要计算每个事件的概率,概率相等就公平,否则就不公平.用到的知识点为:概率=所求情况数与总情况数之比.。
初中化学启东市化学中考适应性测试.doc
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初中化学启东市化学中考适应性测试姓名:_____________ 年级:____________ 学号:______________题型选择题填空题简答题xx题xx题xx题总分得分一、未分类(共12题)评卷人得分1.生活离不开化学,下列日常生活中的现象,其中不属于化学变化的是A.湿衣服经太阳晒后变干B .蜡烛燃烧C.蛋糕放置时间长了发霉D.自行车铁架生锈【答案】A难度:基础知识点:物质的变化和性质2.下列化学用语与含义相符的是A.Na+:钠元素的化合价为+1价B.Mg+2:1个镁离子带2个单位正电荷C.2NO2:2个二氧化氮分子D.2H:1个氢分子由2个氢原子构成【答案】C难度:容易知识点:化学式与化合价3.下列观点中,你____________Si + 2x↑。
由此推断x的化学式为____________。
(4)含硫煤或石油制品燃烧排放的SO2和氮氧化物会引起“酸雨”现象。
要测定某雨水酸度,可使用___________;若汽油中某分子X(相对分子质量为112)由碳、氢两种元素组成,其中氢的质量分数约为14.3%,则分子X中碳原子与氢原子数之比为_________。
(5) 请你举一例在日常生活中符合“低碳”理念的做法____________________________________。
【答案】(1)④⑤(2)CO(3) 空气或氧气,温度达到着火点(4)pH试纸或pH计8∶16(或1∶2,2分)(5)随手关灯、步行代替乘车等(除标出的分数外,其它每空1分,共8分) 难度:中等知识点:燃料及应用单元测试二、选择题(共1题)1.在CuO和Fe的混合物中,加入一定量的稀H2SO4并微热。
当反应停止后,滤出不溶物,再向滤液中放入一粗铁丝,片刻后取出铁丝,发现粗铁丝无任何变化。
据此,你认为下列结论正确的是A.不溶物一定是铜B.不溶物中一定含有铜,也可能含有铁C.滤液中一定含有H2SO4,也可能含有CuSO4D.滤液中一定含有FeSO4,也可能含有CuSO4 和H2SO4【答案】B难度:偏难知识点:常见的酸和碱三、填空题(共2题)1.元素周期律和周期表是学习化学的重要工具,下表是元素周期表的部分信息。
2024届江苏启东中学中考语文最后冲刺模拟试卷含解析
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2024届江苏启东中学中考语文最后冲刺模拟试卷注意事项:1.答卷前,考生务必将自己的姓名、准考证号填写在答题卡上。
2.回答选择题时,选出每小题答案后,用铅笔把答题卡上对应题目的答案标号涂黑,如需改动,用橡皮擦干净后,再选涂其它答案标号。
回答非选择题时,将答案写在答题卡上,写在本试卷上无效。
3.考试结束后,将本试卷和答题卡一并交回。
一、积累与运用1.对下面句子中加点词语的理解不正确的一项是()A.每当与蓝天对视,双眸像被攫住..一般。
(攫住:抓住)B.憧憬..是人生的慰藉。
(憧憬:向往)C.停留在雨过放晴的苍穹..。
(苍穹:天空)D.让心灵去感受震颤,去体味..甜蜜……(体味:亲自体会)2.下列各句中,加点成语使用恰当的一项是()A.海外网文章指出,如今有的领导干部喜欢到处卖弄笔墨,其实胸无城府....,让人联想起鲁迅笔下那些不学无术、附庸风雅的“清国留学生”。
B.在读书汇报会上,张山同学旁征博引,断章取义....,赢得了同学们的一致好评。
C.她喜欢收藏,买了不少关于古玩鉴定的书,到各地去按图索骥....,结果收回来的东西多而杂。
D.从楼市表现来看,几个品牌房企业心领神会....的降价方式可以被称作“多形态营销”手段,但不可否认的是绝大部分房企实际上都在“以价换量”。
3.下列句子没有语病....的一项是()A.校长、副校长和其他学校领导出席了这届毕业典礼。
B.在南山中小学生阅读活动过程中,不少学生养成了探究深度阅读的良好习惯。
C.傅雷多次在家信中向傅聪提出学习要正规化和计划化,生活要科学化的活动。
D.《国风美少年》通过年轻人热衷喜爱的方式,呈现国风音乐,推广国风文化。
4.下列对病句的修改不正确的一项是()A.近日,一幅日本捐赠物资的图片在社交媒体上刷屏,因为在那批物资的包装箱上写着“山川异域,风月同天”八个汉字,寥寥数语传输了别样的温情。
(将“传输”改为“传递”)B.回归祖国 20 年,澳门取得了令全中国人民为之骄傲的历史性成就,“一带一路”倡议,粤港澳大湾区建设等国家战略的实施,澳门将迎来前所未有的巨大机遇。
启东中学中考模拟试卷12.doc
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camera is not so expensive asIts difficult to live in aforeign country, if you don't speak the language. A. exactly B. naturally C. usually D. especially—Where is your father? —He is busy in his office now. He bu siness..I'll give a talk tomorrow. Pm thinking aboutYou play with fire, Tom ・ Its dangerous. A. needrftB. may notC. mustn ,tD. wouldn't My sister doesn't like the dress. She thinks it makes her A. look Iooks C. to look My mother finds great fun to learn to drive a car. A. it B. this C. the —Doctor, it seems you like to work with animals. —Yes, I think animals should as our friends.二、选择 第一部分A. My; hisB. Mine; himC. My; himD. Mine; his —Can I park my car here? —Yes.You can park onA. either B neitherC. bothside of the street.D. allbut it works well, too.to Australia on A. has beenB. has goneC. wentD. will go— important tool the computer is! —I think so. A. What a B. How C. What an D. How an—Did you see the traffic accident yesterday?一Yes ・ It happened when Ipast the museum.A. walkB. am walkingC. will walkD. was walking Oh, its raining very hard! Our sports meeting has to be till next Sunday. A. put offB. put downC. put awayD. put onA. what to sayB. how to sayC. what can I sayD. how can I say fat. D. Iooked D. whatD. what; be regardedA. a; aB. the; theC. the; aD. a; theA. that; regard B that; be regarded C・ what; regardWell never give up working on the experiment, difficult it is.A. no matter howB. no matter whenC. no matter whatD. no matter where Haikou, capital of Hainan Province, is pretty city.()is. I read, 「II be. A. The much; the happy C.The more; the happier()i9. I don't know when my father back, but 「IItell you when he back.A. comes; comesB. come; comeC. come; will comeD. will come; comes()20. Children like houses are painted in different colours.A. whichB. theyC. thoseD. what三、完形填空On a snowy evening, a rich lady was standing by the road. She was very worried. Her 1 had broken down. Just then a poor man named Robert came. He was on his 2 back home from work as usual.The lady wondered, “Is the man going to 3 me? He looks very cold and hungry." But to her surprise, 4 stopped and said with a smile, "Can I help you, madam?"After forty 5 , the car was at last fixed by Robert. The lady wanted to pay him.tlNo, that's 6 , madam." he said, u I was just helping someone in 7 . If you really want to payme back, I hope 8 you see someone in need, you should give him a hand."A few minutes later, the lady 9 a shabby (破旧的)house by the road. She remembered Robert's words, so she stopped.The hostess (女主人)warmly asked her 10 . The lady could see that was a 11 family and that they needed help. When the hostess was making tea in the kitchen, the lady 12 on a table 500 dollars and went away quietly.Robert came home later than before, thinking how 13 their life was. His wife was pregnant(怀孕)and the baby was to be born the next month but there was not 14 money. His wife wentup to him, gave him a kiss and said softly, "Don't worry, dear! Everything's going to be all 15 . A stranger has helped us out."Lets always be ready to help others because helping others is helping ourselves.)i. A. bike B. motorbike C. bus D. car )2. A. step B. way C. road D. life )3. A. help B. save C. kill D. find )4. A. she B. he C. 1D. they )5. A. days B. hoursC. minutesD. years)6. A. nothing B. something C. everything D. anything )7. A. pictureB. rainC. needD. danger()8-A. whateverB. wheneverC. howeverD. whicheverA. talks; doesB. talk; doC. talking; doingD. talk; to do ()i6. of the students in our class boys.A. Two in three; isB. Two third; areC. Two thirds; areD. Two thirds; is ()n. Guilin is famousits beautiful scenery. A. asB. forC. becauseD. toB. more; happierD. The most; the happiestA. sawB. heardC. smeltD. felt()9.A. outB. awayC. inD. along()io.A. terribleB. sadC. richD. poor()H-A. droppedB. forgotC. layD. left()12-A. excitingB. hardC. happyD. interesting()6A. manyB. someC. enoughD. few()14.A. rightB. wrongC. gladD. well()15-四、阅读理解AJames is a good student and he has lots of friends, but he also has a problem. Some older boys are bullying(欺负)him and other teenagers in this situation.Don't feel worried. It's not your fault! Being bullied can make you feel very lonely and angry, but you are not alone. Don't feel that you have to hide the problem. You should find a person you can trust, and tell him. It might be your teacher, your parents, or even your friend's parents. After you tell someone, you will get some support and feel some relief(解脱).Speaking to an adult might make you nervous, but here are other things you can do. Some people express their feelings more easily on paper. Write a letter to someone or keep a diary. Include all the details about what the bullies do, as well as when and where the bullying happens. You can use it as proof to show what is going on. And it is a wonderful idea to show your letter or diary to a teacher or another responsible adult. Then the bullies will feel very afraid if their names appear in a letter!Also, don*t show you are sad and don*t try and fight with the bullies. You could get in trouble yourself. Ignore them and just walk away. The bullies will soon stop.()i. Why does the text advise you not to feel worried if bullied?A. Because you are not alone.B. Because it is not your fault.C. Because someone has known about it.D. Because you're doing something wrong. ()2. You'd better go and find a person you can trust andA. know what happensB. learn from himC. ask for helpD. make him lonely ()3. What do you think the text is trying to tell us?A. What to do about being bullied.B. How to be a good student at school.C. How to write well in a diary.D. How to give suggestions to teenagers. ()4. The Underline word “ignore” means “” in the text.A. take no notice ofB. take care ofC. make full use ofD. get more help fromBIn 1933 an unknown American called Clarence Nash went to see the filmmaker Walt Disney. He had an unusual voice and he wanted to work in Disney's cartoon film for children. When Walt Disney heard Nash's voice, he said, "Stop! That's our duck!"The duck was the now famous Donald Duck, who first appeared in 1934 in the film TheWise Little Hen. Donald lived in an old houseboat and wore his sailor jacket and hat. Later that year he became a star after an eight minute Mickey Mouse film. The cinema audience liked him because he was lazy and greedy, and because he lost his temper very quickly. And they loved his voice when he became angry with Mickey's eight nephews. Soon Donald was more popular than Mickey Mouse himself, probably because he wasn't a goody-goody like Mickey.In the 1930s, 40s and 50s Donald and his friends Mickey, Goofy and Pluto made hundreds of Disney cartoons. He also made educational films about the place of the USA in the world and safety in the home. Then in 1966 Donald Duck and his voice disappeared 一 there were no more new cartoons.Clarence Nash died in February, 1985. But today's children can still see the old cartoons on television and hear that famous voice.()5. Who made Donald Duck film?A. Mickey MouseB. Clarence NashC. Walt Disney()6. When was the first Donald Duck film made?A. In 1933B. In 1934C. In 1966 ()7. Where do today's children see Donald Duck?A. In a new film.B. At the cinema.C. on television.CWe Are One--'Expo Through My Eyes*Sharing increases your happiness. To celebrate the 2010 Shanghai World Expo, China Daily invites you to share what you've seen, heard and experienced at the 6・monthinternational event or Expo-related stories in ENGLISH. Whether you are an Expo volunteer, a journalist, or a tourist, we'd like you to share with us your expo experience, as viewed through your eyes. So if you like, please join us today in sharing the joy!Eligibility (适宜人选):Everyone Topic: 2010 Shanghai World Expo Language: ENGLISH Only Length: No more than 1,000 wordsContent: Stories accompanied (pftW ) by photos are encouraged. Duration: May 1, 2010-October 31, 2010How to submit your stories: Send your stories and photos to expo@ Why join us: In addition to (除......之夕卜)the satisfaction of supporting our work一Your stories will come out on China Daily's website;一You will go in a lucky draw to win a prize. ()8. China Daily invites usA. to celebrate the 2010 Shanghai World ExpoB. to support their workC. to write Expo-related stories in English for themD. to win a prize()9. Your story must notA. be written in English D. be submitted after October 31, 2010.D. Pluto D. In 1930 D. At concerts.B. have any picturesC. be less than 1000 words()io. If your story is chosen by the editor, we can read itA. in a magazineB. in a storybookC. on China Daily's websiteD. in the newspaper named China DailyDYears ago, I lived in a building in a large city. The building next door was only a few feet away from mine・ There was a woman who lived there, whom I had never met, yet I could see her seated by her window each after noon, sewi ng or reading.After several months had gone by, I began to notice that her window was dirty. Everything was unclear through the dirty window.丨would say to myself, "1 wonder why that woman doesn't wash her window. It really looks terrible・”One bright morning I decided to clean my flat, including washing the window on the inside ・Late in the after noon when I finished the cleaning, I sat dow n by the window with a cup of coffee for a rest. What a surprise! Across the way, the woman sitting by her window was clearly visible・ Her window was clean!Then it dawned on me. I had been criticizing(批评)her dirty window, but all the time I was watching hers through my own dirty window.That was quite an important lesson for me. How often had I looked at and criticized others through the dirty window of my heart, through my own shortcomings?From then on, whenever I wanted to judge someone, I asked myself first, "Am I looking at him through my own dirty window?" Then I try to clean the window of my own world so that I may see the world about me more clearly.()n. The writer couldn't see everything clearly through the window becauseA. the woman's window was dirtyB. the writer's window was dirtyC. the woman lived nearbyD. the writer was near-sighted()12. The writer was surprised that ・A. the woman was sitting by her windowB. the woman's window was cleanC. the woman did cleaning in the afternoonD. the woman's window was still terrible ()i3. The underlined part u lt dawned on me" probably means u”.A.丨began to understand itB. it cheered me upC.丨could see myself through the windowD. it made me sad()i4. Which of the following is TRUE according to the passage?A. Both the woman and the writer lived in a small town.B. the writer often cleaned the window.C. Both the woman and the writer worked as cleaners.D. The writer never met the woman.()i5. From the passage, we can learn .A. one shouldn't criticize others very oftenB. one should often make his windows cleanC. one must judge himself before he judges othersD. one must look at others through his dirty windowsEHere are some facts about homes in the United States and the people who live in them. In the early 1990s, about 50% of the Americans owned their homes and the rest rented(租)their homes. The rented homes were usually apartments(公寓).74% of the people in the US make their homes in or around cities. 26% live in the country. Dogs live in about 40% of all homes in the US. About half that number have cats.Families in the US are becoming smaller. On the average, 2.64 people lived at home in early 1990s. In 1960, the average was 3.5.Half of the teenagers in the US have their own bedrooms.An American moves, on the average, twelve times in his or her life・ In Japan a person moves about five times, and in England a person moves eight times.()i6. Most Americans live , according to the passage.A. in or around citiesB. in citiesC. around citiesD. in the country()i7. How many American families own a cat?A. About 40%.B. About 20%C. About 74%.D. About 26%.()i8. On the average, there were people in an American family in 1994.A. more than 3B. only 3.5C. less than 2D. 2.64()i9. in the US have their own bedrooms.A. All of the peopleB. Most of the childrenC. Half of the teenagersD. only some of the teenagers()2o. What can we learn from the passage?A. in the early 1990s, most of the Americans owned their homes.B. Families in the US are becoming bigger and bigger.C. A Japanese moves more often than an American.D. An American moves more often than an Englishman.第二部分—、词汇I.根据解释、首字母或者中文提示完成句子1. This is a (not useful) book; I don*t want to read it again.2. In (we call it autumn in British English), the tree leaves turn brown.3. In modern buildings, we take a I to go up and come down.4. I think the film 2046 is b . Few people like it.6. A bus is responsible for the safety of his passengers.7.It rained last night and the river rose two feet.8.The fishermen are told to be more careful on days.9.More people are getting to know the of environmental protection.10.food is convenient to cook, so it's a craze in supermarkets.in.用动词的适当形式填空11.They won't go to see the film this evening because they (see) it.12.I wonder if Helen (come) tomorrow.13.As soon as he arrived, he (write) to me.14.After an hour's flying, they landed safely just as Peter (expect).15.She is afraid (go) out at night.二、根据首字母提示填空I was in a strange city and I didn't know the city at all. And what is more, I could not speak a word of the I . After having spent my first day in the town centre, I decided to lose my way on my second day, since I was sure that this was the better way of g to know the strange city. I got on the first bus in the morning, rode on it for several stops, then got off it and walked on. The first two hours phappily enough・ Then I decided to turn back to my h for lunch. After walking about for some time, I decided I'd better ask the way. The t was that the only word I knew of the language was the name of the street in which I lived and even that I pronounced badly.I stopped to ask a friendly-looking newspaper s . He smiled and handed me a paper. I shook my head and repeated the name of the street and he put the paper into my hands.丨had to give him some m and went on my way. Then I met a policeman. I asked him at once. The policeman listened to me carefully, smiled and took me b the arm. There was a strange look in his eyes as he pointed left and right and left a . I thanked him politely and began walking on.About an hour passed and I found that the houses were getting fewer and fewer and green fields could be s on either side of me, I had come all the way into the country. The thing left for me to do was to find the nearest bus stat io n.三、任务型阅读,根据短文回答问题Last week, 169 Junior 1 students at No.35 Middle School of Shenyang took their first no-teacher exam. After the teacher handed out the exam paper, he left the room and never came back. A student collected the papers when the exam ended."That test was not only a test of knowledge, but also a test of moral (道德). We wantedto show students how important honesty(诚实)is," said Cai Wenguo, the schoo「s headmaster. The school says no cheating(作弊)happened in the test. Next year, it wants 80% of its exams to be without teachers. But students have different ideas.u l was happy and excited during the exam because my teachers trusted me,n said Lang Yudan, a 15-year-old girl in Class 11."Schools must trust students a lot not to use invigilators (监考人)in exams. But I think it is too early. Some students will cheat if there are no invigilators. And the students will not be able to ask for help when needed/* said Hua Nan.“I don't like having invigilators in exams. When they walk around the classroom, they make me nervous. I would get higher marks without them in the room because I would feel more relaxed," Liu Qingxi said."I think it's very important to have invigilators in exams. Many students want to check their answers with each other after they have finished working on their papers. And they can also keep the classroom in order when something unusual happens. They may make me nervous, but I still think we need them," Shang Yuan said.No-teacher exams may be a good idea. But before using them, schools must tell students the importance of honesty and try to find ways to solve something unusual in exams.1. Why did No. 35 Middle School of Shenyang hold a no-teacher exam?2. How many students with disagreement are mentioned in this passage?3. What does Hua Nan think about no-teacher exams?4. What does the underlined word “them” in the last paragraph refer to?5. 翻译:Schools must trust students a lot and do not use invigilators in exams.。
2024届江苏启东中学中考物理适应性模拟试题含解析
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2024届江苏启东中学中考物理适应性模拟试题考生请注意:1.答题前请将考场、试室号、座位号、考生号、姓名写在试卷密封线内,不得在试卷上作任何标记。
2.第一部分选择题每小题选出答案后,需将答案写在试卷指定的括号内,第二部分非选择题答案写在试卷题目指定的位置上。
3.考生必须保证答题卡的整洁。
考试结束后,请将本试卷和答题卡一并交回。
一、本大题包括10小题,每小题3分,共30分.在每小题给出的四个选项中,只有一项符合题目要求.1.关于如图所示的电和磁知识描述错误的是()A.甲图说明同种电荷相互排斥B.乙图说明电流周围存在磁场C.丙图是电动机工作原理示意图D.丁图是有金属外壳的家用电器使用的插座2.建筑工人用如图所示的滑轮组,在4s内将重为1500N的物体沿水平方向匀速移动2m的过程中,所用的拉力大小为375N,物体受到水平地面的摩擦力为物重的0.4倍.在此过程中下列说法正确的是()A.绳子自由端沿水平方向移动了6 mB.物体受到的拉力为750NC.拉力F的功率为750WD.滑轮组的机械效率为80%3.下列有关热和能的说法中正确的是A.0 ℃的冰熔化成0 ℃的水内能变大B.生活烧水,是利用做功的方法增大水的内能C.内燃机的做功冲程,是将机械能转化为内能D.1 t煤炭的热值大于1 g同种煤炭的热值4.射箭时,拉开的弓弦能将箭射出,箭离开弓弦后还能继续飞行,小明根据这一现象得出了以下结论:①弓弦对箭施加的力改变了箭的运动状态:②弓弦的弹性势能转化为箭的动能;③箭由于惯性作用仍能继续飞行;④在空中飞行的箭若不受任何力作用,将处于静止状态,其中说法正确的是()A.只有①B.只有①②C.只有①②③D.①②③④都正确5.关于现代通信和电磁波,下列说法中正确的是A.光纤通信传输的信息量很大,主要用于无线电广播B.卫星通信利用人造卫星作为中继站进行通信C.电磁波的应用对人类有利无害D.电磁波不能在真空中传播6.下列说法正确的是A.物体的内能增加,则一定是外界对物体做了功B.物体的温度不变,其内能就一定不变C.物体的温度越高,含有的热量越多D.内能是物体内所有分子动能和分子势能的总和7.有一种新型充电宝,既可以利用太阳能给自身充电,又能给手机等电子设备充电.下列有关说法正确的是A.太阳能属于不可再生能源B.太阳能电池可以把太阳能转化为电能C.给手机充电时手机电池相当于电源D.LED指示灯是由超导材料制成的8.(2016•四川达州卷)质量相同的两个实心物体甲和乙,体积之比V甲:V乙=2:3,将它们轻轻放入水中,静止时所受的浮力之比F甲:F乙=8:9,ρ水=1×103kg/m3,下列说法正确的是()A.甲,乙两物体都漂浮在水面上B.甲物体漂浮在水面上,乙物体浸没于水中C.乙物体的密度ρ乙=0.75×103kg/m3D.乙物体的密度ρ乙=0.85×103kg/m39.科学家经过长期研究,发现了电和磁有密切的联系,其中两项重要的科学探究如图甲、乙所示,下列关于这两项科学探究的说法正确的是A.甲图实验探究磁场对通电导线的作用B.乙图实验所揭示的原理可制成电动机C.甲图中导体棒竖直上下运动,电路中会产生电流D.乙图中若只将磁体的两极对调,导体棒的运动方向不改变10.如图所示,闭合开关S,小灯泡正常发光。
启东中考模拟卷数学试卷
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一、选择题(本大题共12小题,每小题4分,共48分)1. 下列各组数中,能构成等差数列的是()A. 1,2,3,4,5B. 1,3,5,7,9C. 2,4,6,8,10D. 1,4,9,16,252. 已知函数f(x)=x2-2x+1,则f(x)的对称轴是()A. x=1B. x=-1C. y=1D. y=-13. 下列函数中,奇函数是()A. f(x)=x3B. f(x)=x2C. f(x)=|x|D. f(x)=x4. 在△ABC中,∠A=30°,∠B=45°,则∠C的度数是()A. 75°B. 105°C. 120°D. 135°5. 若等差数列{an}的公差为d,则数列{an2}的公差是()A. 2dC. 2d2D. 06. 已知二次函数y=ax2+bx+c(a≠0)的图象与x轴有两个交点,且a>0,则下列结论正确的是()A. △=b2-4ac>0B. △=b2-4ac=0C. △=b2-4ac<0D. b2-4ac无意义7. 下列各式中,正确的是()A. (a+b)2=a2+2ab+b2B. (a-b)2=a2-2ab+b2C. (a+b)2=a2+2ab-b2D. (a-b)2=a2-2ab-b28. 在平面直角坐标系中,点A(2,3),点B(4,1),则线段AB的中点坐标是()A. (3,2)B. (3,1)C. (2,2)D. (2,1)9. 已知等比数列{an}的公比为q,则数列{an2}的公比是()A. q2B. 1/qC. q10. 若函数y=f(x)在区间[0,2]上单调递增,则下列函数在区间[0,2]上单调递减的是()A. y=f(-x)B. y=-f(x)C. y=f(2-x)D. y=-f(2-x)11. 在△ABC中,若∠A=90°,∠B=30°,则△ABC的周长与面积之比是()A. 2:1B. 3:1C. 4:1D. 5:112. 下列函数中,有最小值的是()A. y=x2B. y=x3C. y=x2-2x+1D. y=x2+2x+1二、填空题(本大题共8小题,每小题5分,共40分)13. 已知等差数列{an}的首项为2,公差为3,则第10项an=______。
2024届江苏南通启东市南苑中学中考物理全真模拟试题含解析
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2024届江苏南通启东市南苑中学中考物理全真模拟试题考生须知:1.全卷分选择题和非选择题两部分,全部在答题纸上作答。
选择题必须用2B铅笔填涂;非选择题的答案必须用黑色字迹的钢笔或答字笔写在“答题纸”相应位置上。
2.请用黑色字迹的钢笔或答字笔在“答题纸”上先填写姓名和准考证号。
3.保持卡面清洁,不要折叠,不要弄破、弄皱,在草稿纸、试题卷上答题无效。
一、单选题(本大题共10小题,共30分)1.如图所示,放在同种木板上的两个相同物体A和B,在相同拉力F的作用下分别以3cm/s、1cm/s的速度同时做匀速直线运动.经过相同的时间,若F在物块A和物块B所做的功分别用W A和W B表示,功率分别用P A和P B表示,则()A.W A>W B B.W A=W B C.P A=P B D.P A<P B2.如图所示的实验中,能说明电动机工作原理的是A.B.C.D.3.体育测试中,小明立定跳远的运动轨迹如图所示,他在上升过程中()A.动能减小B.动能增大C.重力势能减小D.重力势能不变4.下列诗词中涉及的物态变化需要吸热的是A.晴明风日雨干时B.窗含西岭千秋雪C.雾裹山疑失D.月落乌啼霜满天5.第24届冬季奥林匹克运动会将在2022年由北京市和张家口市联合举办.冰球是比赛项目之一,越来越被大众喜爱.下图为帅气的冰球选手备战训练的瞬间.下列说法正确的是A.冰球运动员在加速滑行过程中,运动状态不变B.运动员不蹬地,会慢慢停下来,说明力是维持物体运动状态的原因C.运动员滑行时不能立即停下来,是因为运动员受到惯性D.运动员站在水平冰面上时,冰面对人的支持力与人受到的重力是一对平衡力6.为了保证居民安全用电,国家认监委要求自2017年4月14日开始执行插座新国标.左图所示的新国标插座加粗电源线内的线芯,并统一使用三脚插头,改用五孔插口或和二孔插口搭配设计,还在插座处设有保护门.关于新国标插座,下列说法不正确的是()A.加粗电源线内的线芯,可以使电源线的电阻变大,发热少B.电源线使用三脚插头,可以使插座上的用电器外壳带电时,电流流入大地C.新国标插座能减少插座上同时使用的用电器数量,防止用电器的总功率过大D.新国标插座设有保护门,可以避免儿童因为手指或金属物体误触导致触电事故7.下列数值最接近实际情况的是A.九年级物理课本的质量约为3kgB.大部分人脉搏跳动100次的时间约为10minC.我省全年的平均气温约为10℃D.一支铅笔的直径约为7cm8.在下列能源中,属于化石能源的是A.核能、生物质能、水能B.电能、汽油、柴油C.太阳能、地热能、风能D.煤、石油、天然气9.下列说法正确的是A.验钞机是应用红外线验钞的B.核辐射对人体有害,核能不是清洁能源C.利用风能、水能可能成为未来理想能源的重要发展方向D.手机打接电话时是利用电磁波通信,而手机接WIFI信号上网不是利用电磁波10.如图所示电路,电阻R1标有“6Ω lA”,R2标有“3Ω 1.2A”,电流表A1、A2的量程均为0~3A,电压表量程0~15V,在a、b间接入电压可调的直流电源.闭合开关s后,为保证R1、R2均不损坏,则允许加的电源电压和通过电流表A1的电流不得超过( )A.9V 1A B.3.6V 1.8A C.9.6V lA D.3.6V 0.6A二、多选题(本大题共3小题,共12分)11.“舌尖上的中国”第三季展示了“石锅”做的美味。
2022年启东中考模拟考试(十二)初中语文
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2008年启东中学中考模拟考试语文试卷(十二)(时间150分钟 满分150分)一、积累与运用(22分)1.根据拼音,在田字格内用正楷写出相应的汉字。
(3分)我的家乡是“百花之神”特别眷顾的地方。
这里,一年四季繁花似锦、芳馨醉人。
花间,鸟儿嬉戏争鸣,蜂蝶翩然起舞。
花下,潺潺流水搅碎婆娑的花影,粼粼水波(dàng yàng )着飘落的花瓣。
(zhàn lán )的天空,阳光亦如鲜花一般尽情(zhàn fàng )着,如此优美的景色,真是令人心旷神怡啊!2.用古诗文原句填空。
[(1)~(4)题必做,(5)(6)两题任选一题](6分)(1)几处早莺争暖树, 。
(白居易《钱塘湖春行》)(2) ,中间小谢又清发。
(李白《宣州谢眺楼饯别校书叔云》)(3)东篱把酒黄昏后, 。
(李清照《醉花阴》)(4)可以调素琴,阅金经, , 。
(刘禹锡《陋室铭》)(5)新市长上任两年,全市面貌大变,干群同心,社会安定,各项建设事业蓬勃发展,真是 , 。
(用范仲淹《岳阳楼记》中的句子填写)(6)王湾在《次北固山下》中写时序更替,抒发思乡之情,蕴涵生活哲理的诗句是 , 。
3.下列各句中,加点成语使用不恰当的一项是(3分)( )A .这篇文章错别字很多,用语无伦次....来评价它是再恰当不过了。
B .坏事做尽的张朝富,虽然一字不识,但未到中年,他的头顶就成了不.毛之地...。
C .小娟郑重其事....地跟我说,她要和我作好朋友。
D .这篇文章虽然写得不好,但比起以前来还是有一点进步的,我这样想,不是聊以自慰....吧?4.下面是某同学作文中的一个片断,仔细阅读后,请选择4处,加以修改。
(4分)人生是无法回头再来的,然而做每件事都要细心瑾慎、小心翼翼。
有时,也许就是因为一个不留神的错误,造成无法挽回的一个遗憾。
朋友:珍重地走好每一步,不要对小事就吊以轻心,希望你稳健地走完自己的旅程。
启东中学中考模拟考试(十二)
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启东中学中考模拟考试(十二)数学试卷本试卷分第I 卷(选择题)和第Ⅱ卷两部分第I 卷(选择题,共32分)一、选择题(本题共10小题;第1~8题每小题3分,第9~10题每小题4分,共32分) 下列各题都有代号为A 、B 、C 、D 的四个结论供选择,其中只有一个结论是正确的。
1.4的算术平方根为A .2B .-2C .±2D .162.下列计算正确的是A .228=-B .14931227=-=-C .3)52)(52(-=+-D .23226=-3.英寸是电视机常用规格之一,1英寸约为拇指上面一节的长,如图1所示,则7英寸长相当于A .课本的宽度B .课桌的宽度C .黑板的高度D .粉笔的长度4.解分式方032222=+---x x x x 时,设y x x=-22,则原方程变形为A .0132=++y y B .0132=-+y y C .0132=+-y yD .0132=--y y5.小颖从家出发,直走了20min ,到一个离家1000m 的图书室,看了40min 的书后,用15min 返回到家,图2中表示小颖离家时间与距离之间的关系的是6.如图3所示,路灯距地面8m ,身高1.6m 的小明从距离灯的底部(点O )20m 的点A 处,沿OA 所在的直线行走14m 到点B 时,人影的长度A .增大1.5mB .减小1.5mC .增大3.5mD .减小3.5m7.如图4所示,在△MBN 中,BM=6,点A 、C 、D 分别在MB 、NB 、MN 上,四边形ABCD 为平行四边形,∠NDC=∠MDA ,则□ABCD 的周长是A .24B .18C .16D .128.小敏在某次投篮中,球的运动线路是抛物线5.3512+-=x y 的一部分,如图5所示,若命中篮圈中心,则他与篮底的距离x 是A .3.5mB .4mC .4.5mD .4.6m9.如图6所示,正方形OABC 、ADEF 的顶点A 、D 、C 在坐标轴上,点F 在AB 上,点B 、E 在函数)0(1>=x xy 的图像上,则点E 的坐标是 A .)215,215(-+B .)253,253(-+ C .)215,215(+-D .)253,253(+- 10.在平面直角坐标系中,已知1),3A(,O (0,0),0),3C(三点,AE 平分∠OAC ,交OC 于E ,则直线AE 对应的函数表达式是A .332-=x y B .23-=x yC .13-=x yD .2-=x y第Ⅱ卷(共118分)二、填空题(本大题共8小题,每小题3分,共24分,把答案填写在题中的横线上。
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启东中学中考模拟试卷英语(十二)第一部分二、选择( )1.camera is not so expensive as , but it works well, too.A. My; hisB. Mine; himC. My; himD. Mine; his ( )2.—Can I park my car here? —Yes. You can park on side of the street.A. eitherB. neitherC. bothD. all( )3.It’s difficult to live in a foreign country, if you don’t speak the language.A. exactlyB. naturallyC. usuallyD. especially ( )4.—Where is your father? —He is busy in his office now. He to Australia on business..A. has beenB. has goneC. wentD. will go( )5.—important tool the computer is! —I think so.A. What aB. HowC. What anD. How an( )6.—Did you see the traffic accident yesterday?—Yes. It happened when I past the museum.A. walkB. am walkingC. will walkD. was walking ( )7.Oh, it’s raining very hard! Our sports meeting has to be till next Sunday.A. put offB. put downC. put awayD. put on( )8.I’ll give a talk tomorrow. I’m thinking about .A. what to sayB. how to sayC. what can I sayD. how can I say ( )9.You play with fire, Tom. It’s dangerous.A. needn’tB. may notC. mustn’tD. wouldn’t ( )10.My sister doesn’t like the dress. She thinks it makes her fat.A. lookB. looksC. to lookD. looked( )11.My mother finds great fun to learn to drive a car.A. itB. thisC. theD. what( )12.—Doctor, it seems you like to work with animals.—Yes, I think animals should as our friends.A. that; regardB. that; be regardedC. what; regardD. what; be regarded ( )13.We’ll never give up working on the experiment, difficult it is.A. no matter howB. no matter whenC. no matter whatD. no matter where ( )14.Haikou, capital of Hainan Province, is pretty city.A. a; aB. the; theC. the; aD. a; the( )15.I don’t like a man who much but little.A. talks; doesB. talk; doC. talking; doingD. talk; to do ( )16.of the students in our class boys.A. Two in three; isB. Two third; areC. Two thirds; areD. Two thirds; is ( )17.Guilin is famous its beautiful scenery.A. asB. forC. becauseD. to( )18.I read, I’ll be.A. The much; the happyB. more; happierC. The more; the happierD. The most; the happiest( )19.I don’t know when my father back, but I’ll tell you when he back.A. comes; comesB. come; comeC. come; will comeD. will come; comes ( )20.Children like houses are painted in different colours.A. whichB. theyC. thoseD. what三、完形填空On a snowy evening, a rich lady was standing by the road. She was very worried. Her 1had broken down. Just then a poor man named Robert came. He was on his 2back home from work as usual.The lady wondered, “Is the man going to 3 me? He looks very cold and hungry." But to her surprise, 4 stopped and said with a smile, “Can I help you, madam?"After forty 5 , the car was at last fixed by Robert. The lady wanted to pay him.“No, that's 6 , madam." he said, “I was just helping someone in 7 . If you really want to pay me back, I hope 8 you see someone in need, you should give him a hand."A few minutes later, the lady 9 a shabby(破旧的) house by the road. She remembered Robert's words, so she stopped.The hostess(女主人) warmly asked her 10 . The lady could see that was a11 family and that they needed help. When the hostess was making tea in the kitchen, the lady 12 on a table 500 dollars and went away quietly.Robert came home later than before, thinking how 13 their life was. His wife was pregnant(怀孕) and the baby was to be born the next month but there was not 14 money. His wife went up to him, gave him a kiss and said softly, “Don't worry, dear! Everything's going to be all 15 . A stranger has helped us out."Let's always be ready to help others because helping others is helping ourselves. ( )1. A. bike B. motorbike C. bus D. car( )2. A. step B. way C. road D. life( )3. A. help B. save C. kill D. find( )4. A. she B. he C. I D. they( )5. A. days B. hours C. minutes D. years( )6. A. nothing B. something C. everything D. anything ( )7. A. picture B. rain C. need D. danger( )8. A. whatever B. whenever C. however D. whichever ( )9. A. saw B. heard C. smelt D. felt( )10.A. out B. away C. in D. along( )11.A. terrible B. sad C. rich D. poor( )12.A. dropped B. forgot C. lay D. left( )13.A. exciting B. hard C. happy D. interesting ( )14.A. many B. some C. enough D. few( )15.A. right B. wrong C. glad D. well四、阅读理解AJames is a good student and he has lots of friends, but he also has a problem. Some older boys are bullying(欺负) him and other teenagers in this situation.Don’t feel worried. It’s not your fault! Being bullied can make you feel very lonely and angry, but you are not alone. Don’t feel that you have to hide the problem. You should find a person you can trust, and tell him. It might be your teacher, your parents, or even your friend’s parents. After you tell someone, you will get some support and feel some relief(解脱).Speaking to an adult might make you nervous, but here are other things you can do. Some people express their feelings more easily on paper. Write a letter to someone or keep a diary. Include all the details about what the bullies do, as well as when and where the bullying happens. You can use it as proof to show what is going on. And it is a wonderful idea to show your letter or diary to a teacher or another responsible adult. Then the bullies will feel very afraid if their names appear in a letter!Also, don’t show you are sad and don’t try and fight with the bullies. You could get in trouble yourself. Ignore them and just walk away. The bullies will soon stop.( )1.Why does the text advise you not to feel worried if bullied?A. Because you are not alone.B. Because it is not your fault.C. Because someone has known about it.D. Because you’re doing something wrong. ( )2.You’d better go and find a person you can trust and .A. know what happensB. learn from himC. ask for helpD. make him lonely ( )3.What do you think the text is trying to tell us?A. What to do about being bullied.B. How to be a good student at school.C. How to write well in a diary.D. How to give suggestions to teenagers. ( )4.The Underline word “ignore” means “” in the text.A. take no notice ofB. take care ofC. make full use ofD. get more help fromBIn 1933 an unknown American called Clarence Nash went to see the filmmaker Walt Disney. He had an unusual voice and he wanted to work in Disney's cartoon film for children. When Walt Disney heard Nash's voice, he said, "Stop! That's our duck!"The duck was the now famous Donald Duck, who first appeared in 1934 inthe film TheWise Little Hen. Donald lived in an old houseboat and wore his sailor jacket and hat. Later that year he became a star after an eight minute Mickey Mouse film. The cinema audience liked him because he was lazy and greedy, and because he lost his temper very quickly. And they loved his voice when he became angry with Mickey's eight nephews. Soon Donald was more popular than Mickey Mouse himself, probably because he wasn't a goody-goody like Mickey.In the 1930s, 40s and 50s Donald and his friends Mickey, Goofy and Pluto made hundreds of Disney cartoons. He also made educational films about the place of the USA in the world and safety in the home. Then in 1966 Donald Duck and his voice disappeared—there were no more new cartoons.Clarence Nash died in February, 1985. But today's children can still see the old cartoons on television and hear that famous voice.( )5.Who made Donald Duck film?A. Mickey MouseB. Clarence NashC. Walt DisneyD. Pluto( )6.When was the first Donald Duck film made?A. In 1933B. In 1934C. In 1966D. In 1930( )7.Where do today’s children see Donald Duck?A. In a new film.B. At the cinema.C. on television.D. At concerts.CWe Are One--'Expo Through My Eyes'Sharing increases your happiness. To celebrate the 2010 Shanghai World Expo, China Daily invites you to share what you’ve seen, hea rd and experienced at the 6-month international event or Expo-related stories in ENGLISH. Whether you are an Expo volunteer, a journalist, or a tourist, we’d like you to share with us your expo experience, as viewed through your eyes. So if you like, please join us today in sharing the joy!Eligibility(适宜人选): EveryoneTopic: 2010 Shanghai World ExpoLanguage: ENGLISH OnlyLength: No more than 1,000 wordsContent: Stories accompanied(附有) by photos are encouraged.Duration:May 1, 2010--October 31, 2010How to submit your stories:Send your stories and photos to expo@ Why join us:In addition to(除……之外) the satisfaction of supporting our work—Your stories will come out on China Daily’s website;—You will go in a lucky draw to win a prize.( )8.China Daily invites us .A. to celebrate the 2010 Shanghai World ExpoB. to support their workC. to write Expo-related stories in English for themD. to win a prize( )9.Your story must not .A. be written in EnglishB. have any picturesC. be less than 1000 wordsD. be submitted after October 31, 2010. ( )10.If your story is chosen by the editor, we can read it .A. in a magazineB. in a storybookC. on China Daily’s websiteD. in the newspaper named China DailyDYears ago,I lived in a building in a large city.The building next door was only a few feet away from mine.There was a woman who lived there,whom I had never met,yet I could see her seated by her window each afternoon,sewing or reading.After several months had gone by,I began to notice that her window was dirty.Everything was unclear through the dirty window.I would say to myself,“1 wonder why that woman doesn't wash her window.It really looks terrible.”One bright morning I decided to clean my flat,including washing the window on the inside.Late in the afternoon when I finished the cleaning,I sat down by the window with a cup of coffee for a rest.What a surprise!Across the way,the woman sitting by her window was clearly visible.Her window was clean!Then it dawned on me.I had been criticizing(批评)her dirty window,but all the time I was watching hers through my own dirty window.That was quite an important lesson for me.How often had I looked at and criticized others through the dirty window of my heart,through my own shortcomings?From then on,whenever I wanted to judgesomeone,I asked myseIf first,“Am I looking at him through my own dirty window?”Then I try to clean the window of my own world so that I may see the world about me more clearly.( )11.The writer couldn't see everything clearly through the window because.A.the woman's window was dirty B.the writer's window was dirtyC.the woman lived nearby D.the writer was near-sighted( )12.The writer was surprised that .A.the woman was sitting by her window B.the woman's window was cleanC.the woman did cleaning in the afternoon D.the woman's window was still terrible ( )13.The underlined part “It dawned on me”probably means“”.A.I began to understand it B.it cheered me upC.I could see myself through the window D.it made me sad( )14.Which of the following is TRUE according to the passage?A. Both the woman and the writer lived in a small town.B. the writer often cleaned the window.C. Both the woman and the writer worked as cleaners.D. The writer never met the woman.( )15.From the passage,we can learn.A.one shouldn’t criticize others very oftenB.one should often make his windows cleanC.one must judge himself before he judges othersD.one must look at others through his dirty windowsEHere are some facts about homes in the United States and the people who live in them. In the early 1990s, about 50% of the Americans owned their homes and the rest rented(租) their homes. The rented homes were usually apartments(公寓).74% of the people in the US make their homes in or around cities. 26% live in the country. Dogs live in about 40% of all homes in the US. About half that number have cats.Families in the US are becoming smaller. On the average, 2.64 people lived at home in early 1990s. In 1960, the average was 3.5.Half of the teenagers in the US have their own bedrooms.An American moves, on the average, twelve times in his or her life. In Japan a person moves about five times, and in England a person moves eight times.( )16.Most Americans live , according to the passage.A. in or around citiesB. in citiesC. around citiesD. in the country ( )17.How many American families own a cat?A. About 40%.B. About 20%C. About 74%.D. About 26%. ( )18.On the average, there were people in an American family in 1994.A. more than 3B. only 3.5C. less than 2D. 2.64( )19.in the US have their own bedrooms.A. All of the peopleB. Most of the childrenC. Half of the teenagersD. only some of the teenagers( )20.What can we learn from the passage?A. in the early 1990s, most of the Americans owned their homes.B. Families in the US are becoming bigger and bigger.C. A Japanese moves more often than an American.D. An American moves more often than an Englishman.第二部分一、词汇Ⅰ.根据解释、首字母或者中文提示完成句子1.This is a (not useful) book; I don’t want to read it again.2.In (we call it autumn in British English), the tree leaves turn brown.3.In modern buildings, we take a I to go up and come down.4.I think the film 2046 is b. Few people like it.5.(地理) and history are two subjects I like best.Ⅱ.用所给词的适当形式填空6. A bus is responsible for the safety of his passengers.7.It rained last night and the river rose two feet.8.The fishermen are told to be more careful on days.9.More people are getting to know the of environmental protection.10.food is convenient to cook, so it’s a craze in supermarkets.Ⅲ.用动词的适当形式填空11.They won’t go to see the film this evening because they (see) it.12.I wonder if Helen (come) tomorrow.13.As soon as he arrived, he (write) to me.14.After an hour’s flying, they landed safely just as Peter (expect).15.She is afraid (go) out at night.二、根据首字母提示填空I was in a strange city and I didn't know the city at all. And what is more, I could notspeak a word of the l. After having spent my first day in the town centre, I decidedto lose my way on my second day, since I was sure that this was the better way of gtoknow the strange city. I got on the first bus in the morning, rode on it for several stops,then got off it and walked on. The first two hours phappily enough. Then I decided toturn back to my hfor lunch. After walking about for some time, I decided I'd better askthe way. The twas that the only word I knew of the language was the name of thestreet in which I lived and even that I pronounced badly.I stopped to ask a friendly-looking newspaper s. He smiled and handed me a paper.I shook my head and repeated the name of the street and he put the paper into my hands. Ihad to give him some m and went on my way. Then I met a policeman. I asked himat once. The policeman listened to me carefully, smiled and took me bthe arm. There wasa strange look in his eyes as he pointed left and right and left a. I thanked him politelyand began walking on.About an hour passed and I found that the houses were getting fewer and fewer andgreen fields could be son either side of me, I had come all the way into the country. Thething left for me to do was to find the nearest bus station.三、任务型阅读,根据短文回答问题Last week,169 Junior 1 students at No.35 Middle School of Shenyang took their first no-teacher exam.After the teacher handed out the exam paper,he left the room and never came back.A student collected the papers when the exam ended.“That test was not only a test of knowledge,but also a test of moral (道德).We wanted to show students how important honesty(诚实) is,”said CaiWenguo,the school’sheadmaster.The school says no cheating(作弊)happened in the test.Next year,it wants 80% of its exams to be without teachers.But students have different ideas.“I was happy and excited during the exam because my teachers trusted me,” said Lang Yudan, a 15-year-old girl in Class 11.“Schools must trust students a lot not to use invigilators (监考人) in exams.But I think it is too early.Some students will cheat if there are no invigilators.And the students will not be able to ask for help when needed,”said Hua Nan.“I don’t like having invigilators in exams. When they walk around the classroom, they make me nervous. I would get higher marks without them in the room because I would feel more relaxed,” Liu Qingxi said.“I think it’s very important to have invigilators in exams.Many students want to check their answers with each other after they have finished working on their papers.And they can also keep the classroom in order when something unusual happens.They may make me nervous,but I still think we need them,”Shang Yuan said.No-teacher exams may be a good idea.But before using them,schools must tell students the importance of honesty and try to find ways to solve something unusual in exams.1.Why did No. 35 Middle School of Shenyang hold a no-teacher exam?2.How many students with disagreement are mentioned in this passage?3.What does Hua Nan think about no-teacher exams?4.What does the underlined word “them” in the last paragraph refer to?5.翻译:Schools must trust students a lot and do not use invigilators in exams.。