12年中考二模.jsp
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某某省某某市2012届中考数学二模试题一、选择题1.-6的相反数是 ( )A .-6B .6C .61 D .612.下列各等式中,正确的是( )A .16 =±4;B .±16 =4C .(-5 )2=-5 D .-(-5)2=-5 3.如左图是由几个相同的小正方体搭成的一个几何体,它的俯视图是( )4.下列各组线段中,能成比例的是( )A . 1 cm ,3 cm ,4 cm ,6 cmB . 30cm ,12 cm ,0.8 cm ,0.2 cmC . 0.1 cm ,0.2 cm ,0.3 cm ,0.4 cmD . 15 cm ,16 cm ,40 cm ,6 cm5.打开某洗衣机开关,在洗涤衣服时(洗衣机内无水),洗衣机经历了进水、清洗、排水、脱水四个连续过程,其中进水、清洗、排水时洗衣机中的水量y (升)与时间x (分钟)之间满足某种函数关系,其函数图象大致为 ( )6.已知圆锥的底面半径为1cm ,母线长为3cm ,则其全面积为 ( )A .πB .3πC .4πD .7π7.下列三视图所对应的直观图是 ( )8.用一把带有刻度的直尺,①可以画出两条平行的直线a 与b ,如图⑴;②可以画出∠AOB 的平分线OP ,如图⑵所示;③可以检验工件的凹面是否为半圆,如图⑶所示;④可以量出一个圆的半径,如图⑷所示.这四种说法正确的个数有 ( )A .1个B .2个C .3个D .4个二、填空题9.分解因式:()2212x x -+=.10.不等式125-x ≤()342-x 的负整数解是. 11.计算:()()15132-----=.12.已知方程032=+-k x x 有两个相等的实数根,则k =.13.在一个不透明的口袋中装有若干个只有颜色不同的球,如果口袋中装有4个红球,且摸出红球的概率为31,那么袋中共有个球. 14.梯形的中位线长为3,高为2,则该梯形的面积为.15.如图15,AB =AC ,要使ACD ABE ∆∆≌,应添加的条件是__________ (添加一个条件即可).16.如图,量角器外缘上有A 、B 两点,它们所表示的读数分别是80°、50°,则∠ACB 应为.17.如图,正方形卡片A 类、B 类和长方形卡片C 类各若干X ,如果要拼一个长为(a +2b )、宽为(a +b )的大长方形,则需要C 类卡片X .18.观察下列一组数的排列:1,1,2,3,5,8,13,21,34,…,前2009个数中,有个偶数.三、解答题19.(1)(本题4分)解方程:32121---=-xxx .(2)(本题4分)先化简,再求值:222211y xy x xy x y x ++÷⎪⎪⎭⎫ ⎝⎛++-,其中1=x ,2-=y .20.(本题8分)如图,在一个10×10的正方形DEFG 网格中有一个△ABC 。
虹口区2012年中考数学模拟练习卷(满分150分,考试时间100分钟)2012.4考生注意:1.本试卷含三个大题,共25题;2.答题时,考生务必按答题要求在答题纸规定的位置上作答,在草稿纸、本试卷上答题一律无效;3.除第一、二大题外,其余各题如无特别说明,都必须在答题纸的相应位置上写出证明或计算的主要步骤.一、选择题:(本大题共6题,每题4分,满分24分)[下列各题的四个选项中,有且只有一个选项是正确的,选择正确项的代号并填涂在答题纸的相应位置上.]1. 下列运算中,正确的是A .532a a a =⋅;B .532)(a a =; C .326a a a =÷; D .426a a a =-.2. 一元二次方程0122=-+x x 的实数根的情况是A .有两个相等的实数根;B .有两个不相等的实数根;C .没有实数根;D .不能确定.3. 把不等式组1010x x +>⎧⎨-≤⎩的解集表示在数轴上,正确的是4. 已知反比例函数1y x=的图像上有两点),(11y xA ,),(22y xB ,且21x x <,那么下列结论中,正确的是A .21y y <;B .21y y >;C .21y y =;D .1y 与2y 之间的大小关系不能确定. 5.如果两圆的直径分别为6和14,圆心距为4,那么这两圆的位置关系是A .内含;B .内切;C .相交;D .外切. 6. 下列命题中,真命题是A .一组对边平行,另一组对边相等的四边形是等腰梯形;B .有一组邻边相等的梯形是等腰梯形;C .有一组对角互补的梯形是等腰梯形;D .有两组对角分别相等的四边形是等腰梯形. 二、填空题:(本大题共12题,每题4分,满分48分)[请将结果直接填入答题纸的相应位置] 7. 分解因式:2218x -= ▲ .A. B . C .D .8. 化简:3122x x x x +++=++ ▲ . 9. 方程组1,2x y xy +=⎧⎨=-⎩的解是 ▲ .10.x -的解是 ▲ .11. 与直线21y x =-+平行,且经过点(-1,2)的直线的表达式是 ▲ . 12. 抛物线221y x x =++的顶点坐标是 ▲ .13. 一个不透明的口袋里有红、黄、绿三种颜色的球(除颜色外其余都相同),其中红球有2 个,黄球有3个,绿球有1个,从该口袋中任意摸出一个黄球的概率为 ▲ .14. 已知在△ABC 中,点D 、点E 分别在边AB 和边AC 上,且AD =DB ,AE =EC ,AB a =,=,用向量、表示向量是 ▲ .15. 正八边形的中心角等于 ▲ 度.16. 若弹簧的总长度y (cm )是所挂重物x (kg )的一次函数,图像如右图所示,那么不挂重物时, 弹簧的长度是 ▲ cm .17. 如图,某公园入口处原有三级台阶,每级台阶高为20cm ,深为30cm ,为方便残疾人士,拟将台阶改为斜坡,设台阶 的起点为A ,斜坡的起始点为C ,现设计斜坡的坡度1:5i =则AC 的长度是 ▲ cm .18. 如图,在△ACB 中,∠CAB=90°,AC=AB =3,将△ABC 沿直线BC 平移,顶点A 、C 、B平移后分别记为A 1、C 1、B 1,若△ACB 与△A 1C 1B 1重合部分的面积2,则CB 1= ▲ .三、解答题(本大题共7题,满分78分) 19.(本题满分10分)0112sin 45(2)()3π--+-- .20.(本题满分10分) 解方程:3321x x x x+-=+.第17题图第18题图21.(本题满分10分)如图,圆O 经过平行四边形ABCD 的三个顶点A 、B 、D ,且圆心O 在平行四边形ABCD 的外部,1tan 2DAB ∠=, AD BD =,圆O 的半径为5,求平行四边形的面积.22.(本题满分10分,第(1)小题4分,第(2)小题3分,第(3)小题3分)为了解某校九年级男生的体能情况,体育老师从中随机抽取部分男生进行引体向上测试,并对成绩进行了统计,绘制成尚不完整的扇形图和条形图,根据图形信息回答下列问题: (1) 本次抽测的男生有________人,抽测成绩的众数是_________; (2) 请将条形图补充完整;(3)若规定引体向上6次以上(含6次)为体能达标,则该校125名九年级男生中估计有多少人体能达标?第21题图抽测成绩(次)第22题图 7次 28%2 8次4次 6次 32% 5次23.(本题满分12分,第(1)小题6分,第(2)小题6分) 如图,已知//ED BC ,2GB GE GF =⋅. (1)求证:四边形ABCD 为平行四边形;(2)联结GD ,若GB=GD ,求证:四边形ABCD 为菱形.24.(本题满分12分,第(1)小题3分,第(2)小题4分,第(3)小题5分)在平面直角坐标系xOy 中,抛物线2(0)y ax bx c a =++≠经过点(3,0)A -和点(1,0)B .设抛物线与y 轴的交点为点C .(1)直接写出该抛物线的对称轴;(2)求OC 的长(用含a 的代数式表示); (3)若ACB ∠的度数不小于90︒,求a 的取值范围.25.(本题满分14分,第(1)小题4分,第(2)小题5分,第(3)小题5分)如图,△ABC 中,∠ABC =90°,AB =BC =4,点O 为AB 边的中点,点M 是BC 边上一动点(不与点B 、C 重合),AD ⊥AB ,垂足为点A .联结MO ,将△BOM 沿直线MO 翻折,点B 落在点B 1处,直线M B 1与AC 、AD 分别交于点F 、N ..(1)当∠CMF =120°时,求BM 的长;(2)设BM x =,CMF y ANF ∆=∆的周长的周长,求y 关于x 的函数关系式,并写出自变量x 的取值范围;(3)联结NO ,与AC 边交于点E ,当△FMC ∽△AEO 时,求BM 的长.第24题图第23题图EDCBFAG O ABCMDN B 1F第25题图2012年虹口区中考数学模拟练习卷答案要点与评分标准说明:1.解答只列出试题的一种或几种解法.如果考生的解法与所列解法不同,可参照解答中评分标准相应评分;2.第一、二大题若无特别说明,每题评分只有满分或零分;3.第三大题中各题右端所注分数,表示考生正确做对这一步应得分数;4.评阅试卷,要坚持每题评阅到底,不能因考生解答中出现错误而中断对本题的评阅.如果考生的解答在某一步出现错误,影响后继部分而未改变本题的内容和难度,视影响的程度决定后继部分的给分,但原则上不超过后继部分应得分数的一半; 5.评分时,给分或扣分均以1分为基本单位.一、选择题:(本大题共6题,满分24分)1.A ; 2.B ; 3.C ; 4.D ; 5.B ; 6.C .二、填空题:(本大题共12题,满分48分)7.2(3)(3)x x +-; 8.2; 9.12122,1,1, 2.x x y y ==-⎧⎧⎨⎨=-=⎩⎩; 10.1x =-; 11.2y x =-; 12.(1,0)-; 13.12; 14.11+a b -;15.45; 16.10; 17.240; 18.或.三、解答题:(本大题共7题,满分78分) 19.解:原式=22132⨯+-……………………………………………………(8分)=0 …………………………………………………………………………………(2分)20.解法1:去分母,得:2(1)(33)2(1)x x x x x -++=+, ………………………(2分)整理,得:24830x x ++= …………………………………………………………(3分)解这个方程,得: 1213,22x x =-=-. …………………………………………(4分) 经检验,1213,22x x =-=-都是原方程的根.所以,原方程的根是1213,22x x =-=-.…………………………………………(1分)解法2:设1xy x =+, 则原方程可化为:32y y-=………………………………………………………(1分)整理,得:2230y y --=…………………………………………………………(2分) 解这个方程,得123,1y y ==-……………………………………………………(2分)当3y =时,31xx =+ 解得32x =- ………………………………………(2分)当1y =-时,11xx -=+ 解得12x =- ………………………………………(2分)经检验,1213,22x x =-=-都是原方程的根.所以,原方程的根是1213,22x x =-=-.………………………………………(1分)21.解:联结OA ,联结OD 交AB 于点E ……………………………………………………(1分)∵ AD BD= ∴OD ⊥AB , AB=2AE …………………………………………………(2分) 在Rt △ADE 中,1tan 2DE DAB AE ∠== 设DE=x ,AE=2x ,……………………………………………………………………(1分) 则OE=5- x 在Rt △AOE 中,222AO OE AE =+∴2225(5)(2)x x =-+ ……………………………………………………………(2分) 解得:122,0x x ==(舍去)………………………………………………………(1分) ∴DE=2,AB=2AE=8…………………………………………………………………(1分) ∴8216ABCD S =⨯= ………………………………………………………………(2分)即 ABC D 的面积为16 22.解:(1)25,6次;……………………………………………………………………(4分) (2)图略;………………………………………………………………………………(3分) (3)8731259025++⨯=(人). 答:该校125名九年级男生约有90人体能达标.……………………………(3分)23. 证明:(1)∵ED ∥BC∴GB GCGE GA=……………………………………………………………………………(1分) ∵GB 2 =GE ·GF ∴GB GFGE GB=∴GF GC GB GA= ……………………………………………………………………………(2分) ∴AB ∥CF 即AB //CD …………………………………………………………………(2分) 又∵ED ∥BC∴四边形ABCD 为平行四边形…………………………………………………………(1分) (2)联结BD 交AC 于点O ………………………………………………………………(1分)∵四边形ABCD 为平行四边形∴BO=DO ,………………………………………………………………………………(2分) ∵GB=GD ∴OG ⊥BD 即AC ⊥BD ………………………………………………(2分)又∵四边形ABCD 为平行四边形∴四边形ABCD 为菱形…………………………………………………………………(1分)24.解:(1)抛物线的对称轴为直线1x =- …………………………………………(3分)(2)把A (-3,0)和B (1,0)分别代入2(0)y ax bx c a =++≠得:0930a b ca b c=-+⎧⎨=++⎩ 解得:3c a =-……………………………………………(3分) ∴3OC a =………………………………………………………………………(1分) (3)当∠ACB =90°时,易得△AOC ∽△BOC∴23OC OB OA =⋅=∴OC = …………………………………………(1分)∴0C 或(, ①a >0时,c <0∵∠ACB 不小于90°∴0c ≤<………………………………………(1分) ∵c =-3a∴0a <≤………………………………………………………(1分) ②a <0时,c >0∵∠ACB 不小于90°∴0c <≤1分)∵c=-3a∴0a ≤<………………………………………………………(1分)所以,综上述,知:0a ≤<或0a <≤.25.解:(1)当120CMF ∠=︒时,可求得:30BMO ∠=︒ …………………………(2分) ∴Rt MOB ∆中,cot 30MB OB =⋅︒= ……………………………(2分)(2)联结ON ,可证:ANO ∆≌1B NO ∆ ∴1AON B ON ∠=∠,1AN NB = 又∵1MOB MOB ∠=∠ ∴90NOM ∠=︒又190OB M B ∠=∠=︒∴可证:1MBO ∆∽1OB N ∆ ∴2111OB MB NB =⋅又1=MB MB x =,12OB OB == ∴212x NB =⋅ ∴14NB x =∴4AN x=……………………………………(2分) ∵AD AB ⊥ ∴90DAB ∠=︒ 又90B ∠=︒ ∴//AD BC∴CMF ∆∽ANF ∆∴2244144CMF ANF C CM x x x x x C AN x∆∆--====-+ ∴214y x x =-+ (04)x <<………………………………………………(2分,1分)(3)由题意知:45EAO C ∠=∠=︒∵△FMC ∽△AEO ∴只有两种情况:FMC AEO ∠=∠或FMC AOE ∠=∠①当FMC AEO ∠=∠时,有CFM AOE ∠=∠又可证:AOE OMB FMO ∠=∠=∠ ∴CFM FMO ∠=∠∴//OM AC ∴45OMB C ∠=∠=︒∴Rt MOB ∆中,cot 452MB OB =⋅︒=………………………………………(2分) ②当FMC AOE ∠=∠时,∵AOE OMB OMF ∠=∠=∠ ∴60CMF OMF OMB ∠=∠=∠=︒∴Rt MOB ∆中,cot 60MB OB =⋅︒=………………………………(2分)所以,综上述,知2BM =或BM =……………………………………(1分)。
金山区2012年初三中考模拟考试数学试卷(满分150分,考试时间100分钟) 2012年4月一、选择题(共6道小题,每小题4分,共24分) 1.14-的绝对值等于……………………………………………………………………( )(A )4(B )4- (C )14(D )14-2.下列计算正确的是……………………………………………………………………( ) (A )248a a a ⋅= (B )224a a a +=; (C )22(2)2a a =;(D )633a a a ÷=.3.二次函数2(1)2y x =--+图像的顶点坐标是……………………………………( ) (A )(1,2) (B )(1,2)- (C )(1,2)--(D )(1,2)-4.众志成城,抗震救灾.某小组7名同学积极捐出自己的零花钱支援灾区,他们捐款的数额分别是(单位:元):50,20,50,30,50,30,120.这组数据的众数和中位数分别是…………………………………………………………………………………( ) (A )120,50 (B )50,20 (C )50,30(D )50,505.若一个多边形的内角和等于900 ,则这个多边形的边数是…………………… ( ) (A )8 (B )7 (C )6 (D )56.在下列命题中,真命题是……………………………………………………………( ) (A )两条对角线相等的四边形是矩形(B )两条对角线互相垂直的四边形是菱形 (C )两条对角线互相平分的四边形是平行四边形 (D )两条对角线互相垂直且相等的四边形是正方形 二、填空题(共12道小题,每小题4分,共48分) 7.在函数2y x =-中,自变量x 的取值范围是 .8.分解因式:2x xy -= .9.如果线段AB =4cm ,点P 是线段AB 的黄金分割点,那么较长的线段BP= cm . 10.方程2x x -=的根是 .11.不等式组10230x x -≤⎧⎨+>⎩的整数解为 .12.如果方程2210kx x ++=有两个不等实数根,则实数k 的取值范围是 .13.点11(,)A x y ,点22(,)B x y 是双曲线2y x=-上的两点,若120x x <<,则1y2y (填“=”、“>”、“<”). 14.有三张大小、形状完全相同的卡片,卡片上分别写有数字1、2、3,从这三张卡片中随机同时抽取两张,用抽出的卡片上的数字组成两位数,这个两位数是偶数的概率是 .15.如图,梯形A B C D 中,AB ∥CD ,CD AB 2=,AD a = ,AB b =,请用向量ba、表示向量A C= .16.已知两圆的圆心距为4,其中一个圆的半径长为3,那么当两圆内切时,另一圆的半径为 . 17.如图,已知AD 为△ABC 的角平分线,//D E A B 交AC 于E ,如果23A E E C=,那么A B A C= .18. 在Rt △ABC 中,∠C =90º ,BC =4 ,AC =3,将△ABC 绕着点B 旋转后点A 落在直线BC上的点A ',点C 落在点C '处,那么'tan AA C 的值是 . 三、解答题(共7道小题,共78分) 19.(本题满分10分)计算:1212sin 45(2)321-⎛⎫-+-π- ⎪-⎝⎭20.(本题满分10分)解方程:281242x x x x -=--+21.(本题满分10分,第(1)小题满分4分,第(2)小题满分6分)B CDABCDEA第15题图第17题图如图,在平行四边形ABCD 中,以点A 为圆心,AB 为半径的圆,交BC 于点E . (1)求证:ABC ∆≌EAD ∆;(2)如果AC AB ⊥,6=AB ,53cos =∠B ,求EC 的长.22.(本题满分10分,第(1)(2)小题满分各3分,第(3)小题满分4分)今年3月5日,光明中学组织全体学生参加了“走出校门,服务社会”的活动,活动分为打扫街道、去敬老院服务和到社区文艺演出三项。
2012年初中毕业生学业考试第二次模拟练习英语试卷二、单项选择(本大题共15小题,每小题1分,共15分)31. This is ___ bedroom. The twin sisters like it very much.A. Anne and JaneB. Ann’s and Jane’sC. Ann’s and JaneD. Ann and Jane’s32. Who is ___ man in the middle of the crowd ? — Do you mean ____ one in blue?A. the, theB. a, theC. a, 不填D. the, 不填33. —What’s one fourth and a half, do you know? —Yes, it’s ___.A. two sixthsB. three fourthsC. one threeD. three sixths34. Our country sent up a rocket with two small satellites into space. One weighed 204 kilos and ___, 25kilos.A. anotherB. otherC. othersD. the other35. Bob never does his homework ___ Mary. He makes lots of mistakes.A. so careful asB. as carefully asC. carefully asD. as careful as36. China lies ___ the east of Asia and ___ the north of Australia.A. to, toB. in, toC. to, inD. in, on37. — Must I write all the words down now? — No, you ___.A. mustn’tB. can’tC. won’tD. needn’t38. There ___ a football match on TV this evening.A. will haveB. is going to beC. hasD. is going to have39. Paper ______ all over the world now.A. is usedB. are usingC. are usedD. have used40. Aunt Li often asks her son ___ too much m eat. It’s bad for his health.A. don’t eatB. not to eatC. not eatD. to not ea41. The dress was very expensive, ___ I didn’t buy it.A. orB. andC. soD. but42. Our team ______ theirs by the score 2-1 in the final football match.A. wonB. hitC. beatD. failed43. This box is ___ heavy ___ I can’t carry it.A. too, toB. so, thatC. very, thatD. too, that44. He didn't know ______ last night.A. when does his son come homeB. when his son comes homeC. when did his son come homeD. when his son came home45. I like people ___ like to help others when they are in trouble.A. whoB. whichC. theyD. what三、完形填空(本大题共10小题,每小题1分,共10分)Hi Frieda,It was a really nice surprise to get your email. I think it’s a great idea to keep writing to each ________ (46). My parents have decided to go back to Greece(希腊) for our holiday next year. Do you think your family will do the same? Then we can meet again!I have two more weeks of holiday before I go back to school. Can you guess what I do every day? I go riding. ________ (47) I told you on holiday, I love horse, and I love riding. I’m very lucky because we live in the country, and my parents _________ (48) a horse last year. His name is Wonderboy. They say the horse is for everyone in the family, but we all know that Wonderboy is ________ (49)! He is the most beautiful animal in the world. He’s brown, with a ________ (50) friendly face. He is quite small, because I’m quite small!There are lots of quiet country roads around my village, and I go out ________ (51) Wonderboy for hours and hours. We ride ________ (52) the roads, and across the fields. Today Wonderboy and I have been for a long, long ride. I feel so happy when I do this.Of course It’s also my job to look after Wonderboy. I clean him and feed him—it’s quite hard work. And when I go back to school, then it can be quite difficult. We have a ________ (53) of homework and I don’t have time to ride Wonderboy every day. But I ________ (54) need to clean and feed him every day.I know you live quite a long way from here. But why ________ (55) you come and stay with us for a weekend? My parents have agreed. We can have a lot of fun. And you can ride Wonderboy if you want! I’d love to see you.Love,Jenny46. A. others B. other C. another D. the other47. A. Because B. When C. As D. So48. A. bought B. made C. sold D. took49. A. my B. mine C. ours D. yours50. A. alive B. lonely C. angry D. lovely51. A. together B. both C. with D. without52. A. along B. cross C. over D. through53. A. lots B. many C. much D. lot54. A. still B. yet C. even D. already55. A. do B. not C. don’t D. aren’t四、阅读理解(本大题共10小题,每小题2分,共20分)AWe each have a memory. That’s why we can still remember things after a long time. Some people have very good memories and they can easily learn many things by heart, but some people can only remember things when they say or do them again and again. Many of the great men of the world have got surprising memories.A good memory is a great help in learning a language. Everybody learns his mother language when he is a small child. He hears the sounds, remembers them and then he learns to speak. Some children are living with their parents in foreign countries. They can learn two languages as easily as one because they hear, remember and speak two languages every day. In school it is not so easy to learn a foreign language becausethe pupils have so little time for it, and they are busy with other subjects, too.But your memory will become better and better when you do more and more exercises.56. Some people can easily learn many things by heart because _________.A. they always sleep very wellB. they often eat good foodC. they read a lot of booksD. they have very good memories57. Everybody learns his mother language .A. at the age of sixB. when he is a small childC. after he goes to schoolD. when he can read and write58. In school the pupils can’t learn a foreign language well because .A. they have no good memoriesB. they have no recordersC. they have too much time for itD. they are busy with other subjectsBHappiness is for everyone. You don’t need to c are about those people who have beautiful houses with large gardens and swimming pools or those who have nice cars and a lot of money and so on. Why? Because those who have big houses may often feel lonely and those who have cars may want to walk on the country roads at their free time. In fact, happiness is always around you if you put your heart into it. When you are in trouble at school, your friends will help you;when you study hard at your lessons, your parents are always taking good care of your life and your health; when you get success, your friends will say congratulations to you; when you do something wrong, people around you will help you to correct it. And when you do something good to others, you will feel happy, too. All these are your happiness. If you notice a bit of them, you can see that happiness is always around you.Happiness is not the same as money. It is a feeling of your heart. When you are poor, you can also be very happy, because you have something else that can’t be bought with mo ney.When you meet with difficulties, you can say loudly you are very happy, because you have more chances to challenge yourself. So you cannot always say you are poor and you have bad luck. As the saying goes, life is like a revolving door. When it does, it also opens. If you take every chance you get, you can be a happy and lucky person.59. Those who have big houses may often feel_____.A. happyB. lonelyC. freeD. excited60. What will your friends say to you when you make great progress?A. Oh, so do I.B. Congratulations.C. Good luck.D. It’s just so-so.61. As the saying goes, life is a revolving door. What does revolving mean here?A. 旋转的B. 敞开的C.封闭的D. 希望的62. Which idea is NOT RIGHT according to the passage?A. People who have cars would never like to walk in the open air.B. You can get help from others when you make mistakes.C. You can still be a happy person even if you have little money.D. Happiness is always around you though difficulties come towards you.CWhen you want to go shopping, decide how much money you can spend for new clothes. Think about the kind of clothes you really need. Then look for those clothes on sale.There are labels(标签)inside all new clothes. The labels tell you how to take care of your clothes. The label for a shirt may tell you to wash it in warm water. A sweater label may tell you to wash by washing in cold water. The label on a coat may say “dry clean only.” Wash ing may damage this coat. If you do as the directions say on the label, you can keep your clothes looking their best. Many clothes today must be dry cleaned. Dry cleaning is expensive. When buying new clothes, check to see if they will need to be dry cleaned. You will save money if you buy clothes that can be washed.You can save money if you buy clothes that are well made. Well-made clothes last longer. They look good even after they have been washed many times. Clothes that cost more money are not always better made. They do not always fit better. Sometime less expensive clothes look and fit better than more expensive clothes.63. The label inside the clothes tell you______.A. how to keep them looking their bestB. how to save moneyC. whether they fit you or notD. where to get them dry cleaned64. We learn from the reading that cheaper clothes______.A. are always worse madeB. must be dry cleanedC. can not be washedD. can sometimes fit you better65.The best title(标题)for the reading should be______.A. Buying Less Expensive ClothesB. Taking Enough Money When ShoppingC. Being a Clever Clothes ShopperD. Choosing the Labels inside New Clothes2012年静海县初中毕业生学业考试第二次模拟练习英语试卷第Ⅱ卷五、完成句子(本大题共5小题,每小题2分,共10分)根据所给中文意思完成句子, 每空限填一词。
2012年初三二模测试卷数学本试卷由选择题、填空题和解答题三大题组成,共29题,满分130分,考试时间120分钟.注意事项:1.答题前,考生务必将自己的姓名、考点名称、考场号、座位号用0.5毫米黑色墨水签字笔填写在答题卡的相应位置上;2.答选择题必须用2B铅笔把答题卡上对应题目的答案标号涂黑,如需改动,请用橡皮擦干净后,再选涂其他答案;答非选择题须用0.5毫米黑色墨水签字笔填写在答题卡指定的位置上,不在答题区域内的答案一律无效,不得用其他笔答题;3.考生答题必须答在答题卡上,保持卡面清洁,不要折叠,不要弄破,答在试卷和草稿纸上一律无效.一、选择题:本大题共10小题,每小题3分,共30分.在每小题给出的四个选项中,只有一项是符合题目要求的.请将正确的答案用2B铅笔涂在答题卡相对应的位置上.1.若a与-12互为倒数,则a是A.-12B.-2C.12D.22.在函数y=12x中,自变量x的取值范围是A.x>2 B.x≠0 C.x<-2 D.x≠23.禽流感病毒非常微小,其半径约为0.00000016m,用科学记数法可以表示为A.1.6×10-5m B.1.6×10-6m C.1.6×10-7m D.1.6×10-8m 4.若一个样本1,3,x,2,5,它的平均数是3,则这个样本的方差是A.10 B C.2 D5.下面右边的图形是由8个棱长为1个单位的小立方体组成的立体图形,这个立体图形的左视图是A B C D6.一家医院某天出生了3个婴儿,假设生男生女的机会相同,则这3个婴儿中,出现2个男婴、1个女婴的概率等于A.18B.38C.12D.787.一次函数y1=kx+b与y2=x+a的图象如图所示,则下列结论:①k<0;②a>0;③当x<3时,y 1<y 2中,正确的个数是A .0B .1C .2D .38.如图,平面直角坐标系中有一张透明纸片,这张透明纸片上有抛物线y =x 2及一点P(2,4).若将此透明纸片向右、向上移动后,得到新抛物线的顶点为(7,2),则此时点P 的坐标是A .(10,4)B .(10,6)C .(9,4)D .(9,6)9.如图,⊙O 1与⊙O 2内切于点A ,其半径分别为r 1与r 2(r 1>r 2).若⊙O 1的弦AB 交⊙O 2于点C (O 1不在AB 上),则AB :AC 的值等于A .2221r rB .21r rC .2122r r D .12r r10.如图,在直角坐标系中,直线y=4++4分别与x 轴、y 轴交于点M 、N ,点A 、B 分别在y 轴、x 轴上,且∠ABO =30°,AB =4,将△ABO 绕原点O 顺时针旋转180°,在旋转过程中,当AB 与直线MN 平行时点A 的坐标为A .(1B1) C1) D .(1二、填空题:本大题共8小题,每小题3分,共24分.请把答案直接填写在答题卡相应的位置上.11.因式分解:a 3-2a 2+a = ▲ .12,若m ,n 是一元二次方程x 2+2x -2=0的两实数根,则m 2+n 2= ▲ .13.如图,AB ∥CD ,AB 与DE 交于点F ,∠B =40°,∠D =70°,则∠E = ▲ °. 14.如图,△ABC 的顶点都在方格纸的格点上,则sinA = ▲ .15.如图,DE 是△ABC 的中位线,DE =2cm ,AB +AC =12cm ,则四边形DBCE 的周长为 ▲ cm .16.如图,在平面直角坐标系中,将两个全等的矩形OABC 和OA'B'C'按图示方式进行放置(其中OA 在x 轴正半轴上,点B'在y 轴正半轴上),OA'与BC 相交于点D ,若点B 坐标为(2,1),则经过点D 的反比例函数解析式是 ▲ .17.如图,四边形OABC 为菱形,B 、C 在以点O 为圆心的EF 上,若OA∠1=∠2,则扇形OEF 的面积为 ▲ cm 2(结果保留π).18.如图,等边三角形ABC 的边长为2,E 、F 、G 分别是AB 、BC 、CA 上的动点,且AE =BF =CG ,当△EFG 的面积恰为△ABC 面积的一半时,AE 的长为 ▲ .三、解答题:本大题共11小题,共76分.把解答过程写在答题卡相对应的位置上,解答时应写出必要的计算过程、推演步骤或文字说明.作图时用2B 铅笔或黑色墨水签字笔.19.(本题满分5分)计算:()1213232-⎛⎫-+-+--- ⎪⎝⎭.20.(本题满分5分)先化简,再求值:224a -²2411142a a a ⎛⎫+⎛⎫-÷- ⎪ ⎪⎝⎭⎝⎭,其中12a =.21.(本题满分5分)解不等式组:()3321318x x x x -⎧+≥⎪⎨⎪--<-⎩,并把解集在数轴上表示出来.22.(本题满分5分)解方程:22212x xx x +=--.23.(本题满分6分)已知:如图,在△ABC中,AB=BC,∠ABC=90°,F为AB延长线上一点,点E在BC上,BE=BF,连接AE、EF和CF.(1)求证:AE=CF;(2)若∠CAE=30°,求∠EFC的度数.24.(本题满分7分)某班同学积极响应“阳光体育工程”的号召,利用课外活动时间积极参加体育锻炼,每位同学从长跑、篮球、铅球、立定跳远中选一项进行训练,训练前后都进行了测试,现将项目选择情况及训练后篮球定时定点投篮测试成绩整理后作出如下统计图表.请你根据图表中的信息回答下列问题:(1)选择长跑训练的人数占全班人数的百分比是▲,该班共有同学▲人:(2)训练后篮球定时定点投篮测试进球数的中位数是▲个;(3)根据测试资料,训练后篮球定时定点投篮的人均进球数比训练前人均进球数增加25%.试求出参加训练前的入均进球数.25.(本题满分6分)某一特殊路段规定:汽车行驶速度不超过36千米/时。
OABC112题图2012年中考数学模拟试卷二一、选择题(本题有10小题,每小题3分,共30分)1. 3的倒数是( )A .13B .— 13C .3D .—32.如图所示的物体的主视图是( )3.下列计算正确的是( )A .2a +3b =5abB .x 2·x 3=x 6C .123=-a aD .()632a a=4.浙江在线杭州2012年1月8日讯:预计今年整个春运期间铁路杭州站将发送旅客342.78万人,与2011年春运同比增长4.7%。
用科学记数法表示342.78万正确的是( ) A .3.4278×107 B .3.4278×106 C .3.4278×105 D .3.4278×104 5.已知两圆的半径分别为3和4,圆心距为1,则两圆的位置关系是 ( ) A.相交B.内切C.外切D.内含6.如图,直线l 1//l 2,则α为( )A .150°B .140°C .130°D .120° 7.九年级一班5名女生进行体育测试,她们的成绩分别为70,80,85,75,85(单位:分),这次测试成绩的众数和中位数分别是( )A .79,85B .80,79C .85,80D .85,858.浙江省庆元县与著名的武夷山风景区之间的直线距离约为105公里,在一张比例尺为1:2000000的旅游图上,它们之间的距离大约相当于( )A .一根火柴的长度B .一支钢笔的长度C .一支铅笔的长度D .一根筷子的长度 9.抛物线)2(--=x x y 的顶点坐标是 ( )A .(-1,-1)B .(-1,1)C .(1,1)D .(1,-1) 10.如图,过x 轴正半轴任意一点P 作x 轴的垂线,分别与反比例函数y 1=2x 和y 2=4x的图像交于点A 和点B.若点C 是y 轴上任意一点,连结AC 、BC ,则△ABC 的面积为( )A .1B .2C .3D .4二、填空题(本题有6小题,每小题4分,共24分) 11.因式分解:ma+mb = . 12.如图,O 为直线AB 上一点,∠COB=30°,则∠1= . 13.如图,AB 为⊙O 直径,点C 、D 在⊙O 上,已知∠AOD =50°,AD ∥OC ,则∠BOC = 度.14.三张完全相同的卡片上分别写有函数x y 2=、xy 3=、2x y =,从中随机抽取一张,则所得卡片上函数的图象在第一象限内y 随x 的增大而增大的概率是 .15.如图,已知梯形ABCD 中,AD ∥BC ,BD 是对角线.添加下列条件之一:①AB =DC ;②BD 平分∠ABC ;③∠ABC =∠C ;④∠A +∠C =180°,能推得梯形ABCD 是等腰梯形的是 (填编号).16.图1是一个八角星形纸板,图中有八个直角,八个相等的钝角,每条边都相等.如图2将纸板沿虚线进行切割,无缝隙无重叠的拼成图3所示的大正方形,其面积为8+42,则图3中线段AB 的长为 .BA图1 图2 图3三、解答题(本题有8小题,共66分,各小题都必须写出解答过程) 17.(本题8分)(1)计算:()0|tan 45|122012π+-+o(2)当2x =-时,求22111x x x x ++++的值.18.(本题6分)如图,放置在水平桌面上的台灯的灯臂AB 长为40cm ,灯罩BC 长为30cm ,底座厚度为2cm ,灯臂与底座构成的∠BAD =60°.使用发现,光线最佳时灯罩BC 与水平线所成的角为30°,此时灯罩顶端C 到桌面的高度CE 是多少cm ?(结果精确到0.1cm ,参考数据:3≈1.732)l 1l 2 50° 70° α 24y x = 12y x= ACD(第15题)19.(本题6分)已知二次函数y=x2+2x+m的图象C1与x轴有且只有一个公共点.(1)求C1的顶点坐标;(2)将C1向下平移若干个单位后,得抛物线C2,如果C2与x轴的一个交点为A(﹣3,0),求C2的函数关系式,并求C2与x轴的另一个交点坐标;20.(本题6分)如图,已知AB是⊙O的直径,PB为⊙O的切线,B为切点,OP⊥弦BC于点D且交⊙O于点E.(1)求证:∠OPB=∠AEC;(2)若点C为半圆¼ACB的三等分点,请你判断四边形AOEC为哪种特殊四边形?并说明理由.21.(本题8分)实施新课程改革后,学生的自主学习、合作交流能力有很大提高,张老师为了了解所教班级学生自主学习、合作交流的具体情况,对本班部分学生进行了为期半个月的跟踪调查,并将调查结果分成四类,A:特别好;B:好;C:一般;D:较差;并将调查结果绘制成以下两幅不完整的统计图,请你根据统计图解答下列问题:(1)本次调查中,张老师一共调查了名同学,其中C类女生有名,D类男生有名;(2)将上面的条形统计图补充完整;(3)为了共同进步,张老师想从被调查的A类和D类学生中分别选取一位同学进行“一帮一”互助学习,请用列表法或画树形图的方法求出所选两位同学恰好是一位男同学和一位女同学的概率.22.(本题10分)产自庆元县百山祖山麓一带的“沁园春”茶叶是丽水市知名品牌.现该品牌旗下一茶厂有采茶工人30人,每人每天采鲜茶叶“炒青”20千克或鲜茶叶“毛尖”5千克.已知生产每千克成品茶叶所需鲜茶叶和销类别生产1千克成品茶叶所需鲜茶叶(千克)销售1千克成品茶叶所获利润(元)炒青 4 40毛尖 5 120(1)若安排x人采“炒青”,则可采鲜茶叶“炒青”千克,采鲜茶叶“毛尖”千克.(2)若某天该茶厂工生产出成品茶叶102千克,则安排采鲜茶叶“炒青”与“毛尖”各几人?(3)根据市场销售行情,该茶厂的生产能力是每天生产成品茶叶不少于100千克且不超过110千克,如果每天生产的茶叶全部销售,如何分配采茶工人能使获利最大?最大利润是多少?23.(本题10分)定义:若某个图形可分割为若干个都与他相似的图形,则称这个图形是自相似图形.探究:(1)如图甲,已知△ABC中∠C=90°,你能把△ABC分割成2个与它自己相似的小直角三角形吗?若能,请在图甲中画出分割线,并说明理由.(2)一般地,“任意三角形都是自相似图形”,只要顺次连结三角形各边中点,则可将原三分割为四个都与它自己相似的小三角形.我们把△DEF(图乙)第一次顺次连结各边中点所进行的分割,称为1阶分割(如图1);把1阶分割得出的4个三角形再分别顺次连结它的各边中点所进行的分割,称为2阶分割(如图2)……依次规则操作下去.n阶分割后得到的每一个小三角形都是全等三角形(n为正整数),设此时小三角形的面积为S n.①若△DEF的面积为1000,当n为何值时,3<S n<4?(请用计算器进行探索,要求至少写出二次的尝试估算过程)②当n>1时,请写出一个反映S n-1,S n,S n+1之间关系的等式(不必证明)BC A图甲24.(本题12分)已知:在矩形A0BC 中,分别以OB ,OA 所在直线为x 轴和y 轴,建立如图所示的平面直角坐标系.E 是边AC 上的一个动点(不与A ,C 重合),过E 点的反比例函数(0)ky k x=>的图象与BC 边交于点F .(1)若△OAE 、△OBF 的面积分别为S 1、S 2且S 1+S 2=2,求k 的值;(2)若OB=4,OA=3,记OEF ECF S S S =-△△问当点E 运动到什么位置时,S 有最大值,其最大值为多少?(3)请探索:是否存在这样的点E ,使得将△CEF 沿EF 对折后,C 点恰好落在OB 上?若存在,求出点E 的坐标;若不存在,请说明理由.2012年中考数学模拟试卷二参考答案题次 12345678 9 10 答案A C DB B DCACA二、填空题(本题有6小题,每小题4分,共24分) 11. m(a+b);12. 150°;13. 65;14.23;15. ①③④;16. 1+2 三、解答题(本题有8小题,共66分,各小题都必须写出解答过程) 17.(本题8分)(1)原式=1+23-1=23(2)解:原式=2221(1)111x x x x x x +++==+++ 当2x =-时,原式1211x =+=-+=- (说明:直接代入求得正确结果的给满分) 18.(本题6分)解:∵灯罩BC 长为30cm ,光线最佳时灯罩BC 与水平线所成的角为30°, ∴sin30°=30CM BC CM =,∴CM=15cm .∵sin60°=BA BF ,∴23=40BF,解得BF=203,∴CE =2+15+203≈51.6cm .答:此时灯罩顶端C 到桌面的高度CE 是51.6cm .19.(本题6分)解:(1)y =x 2+2x +m=(x +1)2+m ﹣1,对称轴为x =﹣1,∵与x 轴有且只有一个公共点,∴顶点的纵坐标为0,∴C 1的顶点坐标为(﹣1,0);(2)设C2的函数关系式为y=(x+1)2+k,把A(﹣3,0)代入上式得(﹣3+1)2+k=0,得k=﹣4,∴C2的函数关系式为y=(x+1)2﹣4.∵抛物线的对称轴为x=﹣1,与x轴的一个交点为A(﹣3,0),由对称性可知,它与x轴的另一个交点坐标为(1,0);20.(本题6分)(1)证明:∵AB是⊙O的直径,PB为⊙O的切线,∴PB⊥AB.∴∠OPB+∠POB=90°.∵OP⊥BC,∴∠ABC+∠POB=90°.∴∠ABC=∠OPB.又∠AEC=∠ABC,∴∠OPB=∠AEC.(2)解:四边形AOEC是菱形.∵OP⊥弦BC于点D且交⊙O于点E,∴»CE=»BE.∵C为半圆ACB¯的三等分点,∴»AC=»CE=»BE.∴∠ABC=∠ECB.∴AB∥CE.∵AB是⊙O的直径,∴AC⊥BC.又OP⊥弦BC于点D且交⊙O于点E,∴AC∥OE.∴四边形AOEC是平行四边形.又OA=OE,∴四边形AOEC是菱形.21.(本题8分)解:(1)20, 2 ,1;(2)如图(3)选取情况如下:∴所选两位同学恰好是一位男同学和一位女同学的概率2163==P22.(本题10分)解:(1)设安排x人采“炒青”,20x;5(30-x).(2)设安排x人采“炒青”,y人采“毛尖”则30205(30)10245x yx x+=⎧⎪-⎨+=⎪⎩,解得:1812xy=⎧⎨=⎩,即安排18人采“炒青”,12人采“毛尖”.(3)设安排x人采“炒青”,205(30)11045205(30)10045x xx x-⎧+≤⎪⎪⎨-⎪+≥⎪⎩解得:17.5≤x≤20①18人采“炒青”,12人采“毛尖”.②19采“炒青”,11人采“毛尖”.③20采“炒青”,10人采“毛尖”.所以有3种方案.计算可得第(1)种方案获得最大利润.18×204×40+12×55×120=5040元最大利润是5040元.23.(本题10分)解:(1)正确画出分割线CD(如图,过点C作CD⊥AB,垂足为D,CD即是满足要求的分割线,若画成直线不扣分)理由:∵∠B = ∠B,∠CDB=∠ACB=90°∴△BCD ∽△ACB(2)①△DEF 经N阶分割所得的小三角形的个数为n41∴S =n41000,当n =3时,S3 =31000S≈15.62当n = 4时,S4 =41000S≈3.91 ∴当n= 4时,3 <S4<4②S 2 = S 1-n × S 1+n ,S 1-n = 4 S, S= 4 S 1+n 24.(本题12分)解:(1)∵点E 、F 在函数ky x=(k >0)的图象上, ∴设E (x 1,1k x ),F (x 2,2kx ),x 1>0,x 2>0, ∴111122k K S x x ==,S 2= 22122k K x x = , ∵S 1+S 2=2,∴22K K+=2,∴k =2; (2)由题意知:E F ,两点坐标分别为33kE ⎛⎫ ⎪⎝⎭,,44k F ⎛⎫ ⎪⎝⎭,, ∴1111432234ECF S EC CF k k ⎛⎫⎛⎫==-- ⎪⎪⎝⎭⎝⎭g △, ∴11121222EOF AOE BOF ECF ECF ECF AOBC S S S S S k k S k S =---=---=--△△△△△△矩形 ∴11112212243234OEF ECF ECF S S S k S k k k ⎛⎫⎛⎫=-=--=--⨯-- ⎪⎪⎝⎭⎝⎭△△△ ∴2112S k k =-+.当161212k =-=⎛⎫⨯- ⎪⎝⎭时,S 有最大值.131412S -==⎛⎫⨯- ⎪⎝⎭最大值.此时,点E 坐标为(2,3),即点E 运动到AC 中点.(3)解:设存在这样的点E ,将CEF △沿EF 对折后,C 点恰好落在OB 边上的M 点,过点E 作EN OB ⊥,垂足为N .由题意得:3EN AO ==,143EM EC k ==-,134MF CF k ==-, 90EMN FMB FMB MFB ∠+∠=∠+∠=o Q ,∴EMN MFB ∠=∠.又90ENM MBF ∠=∠=oQ ,∴ENM MBF △∽△.∴EN EM MB MF=,∴11414312311331412k k MB k k ⎛⎫-- ⎪⎝⎭==⎛⎫-- ⎪⎝⎭, ∴94MB =. 222MB BF MF +=Q ,∴222913444k k ⎛⎫⎛⎫⎛⎫+=- ⎪ ⎪ ⎪⎝⎭⎝⎭⎝⎭,解得218k =.∴25438k EM EC ==-=,故AE=78. ∴存在符合条件的点E ,它的坐标为(78,3).。
2012学年第二学期徐汇区学习能力诊断卷初三年级数学学科2013.4(时间100分钟 满分150分)考生注意∶1.本试卷含三个大题,共25题;答题时,考生务必按答题要求在答题纸规定的位置上作答,在草稿纸、本试卷上答题一律无效; 2.除第一、二大题外,其余各题如无特别说明,都必须在答题纸的相应位置上写出证明或计算的主要步骤. 一.选择题(本大题共6题,每题4分,满分24分) 1.下列二次根式中与3是同类二次根式的是A.6; B.8;C.12;D.18.2.将抛物线2)2(+=x y 向下平移2个单位后,所得抛物线解析式为A.2x y =; B.22-=x y ;C.2)2(2++=x y ; D.2)2(2-+=x y . 3.如果关于x 的一元二次方程0122=-+-m x x 有两个不相等的实数根,那么m 的取值范围是A.m >2; B.m <2; C.m >2且1≠m ;D.m <2且1≠m . 4.下列一组数据:2-、1-、0、1、2的平均数和方差分别是A.0和2; B.0和2; C.0和1; D.0和0. 5.下列正方形的性质中,菱形(非正方形)不具有的性质是A.四边相等; B.对角线相等;C.对角线平分一组对角; D.对角线互相平分且垂直.6.在ABC ∆中,2==AC AB ,︒=∠150A ,那么半径长为1的⊙B 和直线AC 的位置关系是A.相离; B.相切; C.相交; D.无法确定. 二.填空题(本大题共12题,每题4分,满分48分) 7.化简:=---111x x x ▲ .8.计算:=-)13(2a a _______▲_________. 9.方程11-=-x x 的解是 ▲ .10.已知函数xx f -=22)(,那么=-)1(f ▲ .11.如图1,点A 在反比例函数的图像上,那么该反比例函数的解析式是 ▲ .12.如图2,在ABC ∆中,中线AD 和BE 相交于点G ,如果AB a =,AC =b ,那么向量AG =▲ .13.如图3,AB ∥CD ,CB 平分ACD ∠,如果︒=∠120BAC ,那么=B cos ▲ . 14.在形状、大小、颜色都一样的卡片上,分别画有线段、直角三角形、等腰三角形、等边三角形、平行四边形、菱形、等腰梯形、正五边形、正六边形、圆等10个图形,小杰随机抽取一张卡片,抽得图形既是轴对称图形,又是中心对称图形的概率是___▲_____. 15.为了解某校初三年级学生一次数学测试成绩的情况,从近450名九年级学生中,随机抽取50名学生这次数学测试的成绩,通过数据整理,绘制如下统计表(给出部分数据,除[90,100]组外每组数据含最低值,不含最高值):分数段 [ 0, 60] [60, 70] [70, 80] [80, 90] [90,100]频 数 5 20 频 率0.120.1根据上表的信息,估计该校初三年级本次数学测试的优良率(80分及80分以上)约为▲ (填百分数). 16.如图4,⊙O 半径为5,ABC ∆的顶点在⊙O 上,AC AB =,BC AD ⊥,垂足是D ,2cot =B ,那么AD 的长为 ▲ .17.一个二元一次方程和一个二元二次方程组成的二元二次方程组的解是2,4x y =⎧⎨=⎩或2,4x y =-⎧⎨=-⎩,试写出一个符合要求的方程组__________▲ _____________(只需写一个). 18.在ABC Rt ∆中,︒=∠90C ,54sin =A ,将ABC ∆绕点A 旋转后,点C 落在射线BA 上,点B 落到点D 处,那么ADB ∠sin 的值等于 ▲ .三.(本大题共7题,第19—22题每题10分;第23、24题每题12分;第25题14分;满分78分) 19.(本题满分10分)计算:2)21(23130cot )2(---+︒--π.ABC D(图3)(图1)xO y A31A BCD E G (图2)(图4)ABCDO20.(本题满分10分)解不等式组:⎪⎩⎪⎨⎧-≥----31123)4(2xx x x ;并将解集在数轴上表示出来.21.(本题满分10分,每小题5分)销售某种商品,根据经验,销售单价不少于30元∕件,但不超过50元∕件时,销售数 量y (件)与商品单价x (元∕件)的函数关系的图像如图5所示中的线段AB . (1)求y 关于x 的函数关系式;(2)如果计划每天的销售额为2400元时,那么该商品的单价应该定多少元?22.(本题满分10分,每小题5分)如图6,梯形ABCD 中,AB ∥CD ,AC 和BD 相交于点O ,AB BD ⊥,3=AB ,4=BD ,2=CD .求:(1)CAB ∠tan 的值;(2)AOD ∆的面积.23.(本题满分12分)如图7,四边形ABCD 是平行四边形,在边AB 的延长线上截取AB BE =,点F 在AE的延长线上,CE 和DF 交于点M ,BC 和DF 交于点N .(1)求证:四边形DBEC 是平行四边形; (4分) (2)如果AF AB AD ⋅=2,求证:CN DM AB CM ⋅=⋅. (8分)ABCD E FM(图7)N5- 1- 4- 3- 2- 0 1 2 3 4 5数量(件)(图5)x Oy 100 20 30 50 单价(元/件)AB(图6)ABCD O24.(本题满分12分)抛物线bx ax y +=2(0≠a )经过点)491(,A ,对称轴是直线2=x ,顶点是D ,与x 轴正半轴的交点为点B .(1)求抛物线bx ax y +=2(0≠a )的解析式和顶点D 的坐标; (6分)(2)过点D 作y 轴的垂线交y 轴于点C ,点M 在射线BO 上,当以DC 为直径的⊙N 和以MB 为半径的⊙M 相切时,求点M 的坐标. (6分) 25.(本题满分14分)如图8,在ABC Rt ∆中,︒=∠90CAB ,3=AC ,4=AB ,点P 是边AB 上任意一点,过点P 作AB PQ ⊥交BC 于点E ,截取AP PQ =,联结AQ ,线段AQ 交BC 于点D ,设x AP =,y DQ =.(1)求y 关于x 的函数解析式及定义域; (4分) (2)如图9,联结CQ ,当CDQ ∆和ADB ∆相似时,求x 的值; (5分)(3)当以点C 为圆心,CQ 为半径的⊙C 和以点B 为圆心,BQ 为半径的⊙B 相交的另一个交点在边AB 上时,求AP 的长. (5分)(图8)CABDEP QCA B DEPQ(图9) (备用图)CAB2012学年第二学期徐汇区学习能力诊断卷 初三年级数学学科参考答案和评分标准一、选择题:(本大题共6题,每题4分,满分24分) 1.C ; 2.D ; 3.B ; 4.A ; 5.B ; 6.B . 二.填空题:(本大题共12题,满分48分)7.1-; 8.a a 262-; 9.11=x 或22=x ; 10.32; 11.x y 3=; 12.b a 3131+;13.23;14.52;15.38﹪;16.2;17.不唯一,如⎩⎨⎧==;8,2xy x y 等; 18.552或55.三、(本大题共7题,第19、20、21、22题每题10分,第23、24题每题12分,第25题14分,满分78分) 19. 解:原式 42331-++-=…………………………………………………(8分)32-=……………………………………………………………………(2分)20.解:由不等式(1)解得x <2………………………………………………………(3分)由不等式(2)解得x ≥1…………………………………………………………(3分) ∴原不等式组的解集是1≤x <2 ……………………………………………(2分) 图正确.……………………………………………………………………………(2分) 21.解:(1)设y 关于x 的函数关系式为)0(≠+=k b kx y .…………………………(1分)由题意,得⎩⎨⎧=+=+;2050,10030b k b k ……………………………………………(2分)解得,⎩⎨⎧=-=;220,4b k ……………………………………………………………(1分)∴ y 关于x 的函数关系式为2204+-=x y . …………………………(1分) (2)设该商品的单价应该定x 元.………………………………………………(1分)由题意,得2400)2204(=+-x x …………………………………………(1分) 化简整理,得0600552=+-x x .………………………………………(1分) 解得,401=x ,152=x . ………………………………………………(1分)经检验,152=x 不合题意,舍去;………………………………………(1分)答:计划每天的销售额为2400元时,该商品的单价应该定40元.22.解:(1)∵AB ∥CD ,∴23==CDAB DOBO . ……………………………………(2分)∵4=BD ,∴512453=⨯=BO .………………………………………(1分)在ABO Rt ∆中,︒=∠90ABO , ∴54tan ==∠ABBO CAB .…………………………………………………(2分)(2)∵585124=-=-=BO BD DO …………………………………………(2分)∴5125832121=⨯⨯=⋅=∆DO AB S AOD .…………………………………(3分)23.证明:(1) ∵四边形ABCD 是平行四边形,∴DC ∥AB ,AB DC =;…………………………………………(2分) ∵AB BE =,∴BE DC =;…………………………………………(1分) 又DC ∥BE ,∴四边形DBEC 是平行四边形.………………………………………(1分)(2) ∵AF AB AD ⋅=2,∴ADAF ABAD =,………………………………(1分)又A A ∠=∠,∴ADB ∆∽AFD ∆,∴DFA ADB ∠=∠; ……(1分) ∵DC ∥AB ,∴DFA CDF ∠=∠;………………………………(1分) ∵四边形ABCD 是平行四边形,∴BC ∥AD ,∴DBC ADB ∠=∠;(1分) ∵四边形DBEC 是平行四边形,∴CE ∥DB ,∴DBC MCN ∠=∠;(1分) ∴CDF MCN ∠=∠;…………………………………………………(1分) 又DMC CMN ∠=∠,∴CMN ∆∽CMD ∆,∴DCCN DMCM =,…(1分)∵AB DC =,∴ABCN DMCM =,∴CN DM AB CM ⋅=⋅.………………………………………………(1分)24.解:(1)由题意,得⎪⎪⎩⎪⎪⎨⎧=-=+;22,49ab b a ,…………………………………………………(2分)解得⎪⎩⎪⎨⎧=-=;3,43b a ……………………………………………………………(2分)∴x x y 3432+-= ………………………………………………………(1分)∴顶点)3,2(D . …………………………………………………………(1分) (2)设⊙M 的半径为r .由题意,可得)3,0(C ,)3,1(N ,∴⊙N 的半径为1;)0,4(B ;……(2分) 当⊙M 和⊙N 相切时,分下列两种情况:︒1 当⊙M 和⊙N 外切时,此时点M 在线段BO 上,可得222)1()14(3+=--+r r . 解得817=r ,∴)0,815(M .……………………………………………(2分)︒2 当⊙M 和⊙N 外切时,此时点M 在线段BO 的延长线上,可得222)1()21(3-=--+r r . 解得417=r ,∴)0,41(-M .…………………………………………(2分)综合︒︒21、,当⊙M 和⊙N 相切时,)0,815(M 或)0,41(-M .25.解:(1)过点D 作AC DM ⊥,垂足为M .由题意,可知APQ ∆是等腰直角三角形,∴x AQ 2=;……………(1分)易得CMD ∆∽CAB ∆,∴43==ABCA DMCM ;设x CM 3=,x DM 4=,∴x AM 4=,∴73=x ,712==AM DM∴2712=AD ……………………………………………………………(1分) ∴27122-=x y .………………………………………………………(1分)定义域是:712≤x ≤4 .………………………………………………(1分)(注:其它解法参照评分.)(2)∵ADB CDQ ∠=∠,∴当CDQ ∆和ADB ∆相似时,分以下两种情况:(1分)︒1 当B QCD ∠=∠时,∴CQ ∥AB ,易得四边形CAPQ 是正方形;∴3===AC AP x . …………………………………………………(2分)︒2 当QAB QCD ∠=∠时,∴BDQD ADCD =,由上述(1)的解法,可得715=CD ,720=BD∴7207152712⨯=y ,∴14225=y ;∴1422527122=-x ,解得27=x .………………………………(2分)综合︒︒21、,当CDQ ∆和ADB ∆相似时,x 的值为3或27.(3)如图,设⊙C 与⊙B 相交的另一个交点为M ,联结QM 交BC 于点N . ∴QM BC ⊥,MN QN =.易得BMN ∆∽CAB ∆,QPM ∆∽CAB ∆,∴43==ABAC BNMN ,设t MN 3=,t BN 4=,∴t BM 5=; …(1分)∴t QM 6=,∴t PQ 524=;∵t BM BQ 5==,∴t BP 57=; …(1分)又t PQ AP 524==,∴457524=+t t ,解得3120=t ; ……………(2分)∴31963120524=⨯=AP .…………………………………………………(1分)PCABMNQ。
苏州市立达中学2012年中考二模英语试卷本试卷分为第一卷(选择题)和第二卷(非选择题)两部分。
共五大题,56小题,满分100分(不含听力和口试30分),考试用时100分钟。
第一卷(三大题共55分)一、选择填空(共25小题;每小题1分,满分25分)A) 单项填空(共I5小题;每小题1分,满分15分)请认真阅读下面各题,从A、B、C、D四个选项中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。
1. It is not rare in _______ that people in _______fifties are going to university for further education.A. 1990s; theB. the 1990s; /C. 1990s; theirD. the 1990s; their2. He dropped the _______ and broke it .A. cup of coffeeB. coffee’s cupC. cup for coffeeD. coffee cup3. ---When shall we meet again?---Make it _______ day you like, it’s all the same to me.A. oneB. anyC. anotherD. some4. Everyone had an application form in his hand, but no one knew which office room _______.A. to send it toB. to send itC. to be sent toD. to have it send5. ---We can't believe that little girls can finish _______ much work in _______ a short time---I don't agree with you, _______.A. such, so, suchB. so, so ,suchC. so, such, suchD. such, so, so6. ---Why should I try Larry and Kevin’s cakes?---Because _______ the best.A. his areB. theirs areC. theirs isD. his7. They are able to show that we all have a ‘body clock’ _______ us.A. insideB. aroundC. intoD. on8. ---Will you stay for lunch?--Sorry, I_______ My brother is coming to see me.A. won'tB. mustn'tC. can’tD. needn't9.Mrs.King kept weighing herself to see how much _______ she was getting.A. heavyB. heavierC. the heavierD. the heaviest10. You can arrive in Beijing earlier for the meeting _______ you don mind taking the night trainA. ifB. unlessC. thoughD. until11. ---Could you come back home at 5 o'clock this afternoon?---_______, I'll be at a meeting at that time.A. I'm afraid notB. I think soC. I hope notD. I’m afraid so12. --- He's never been to Suzhou, _______?--- _______ .He wishes to go there again,A. is he; No, he isn’tB. has he; No, he hasn'tC. has he; Yes, he has.D. is he; Yes, he is13. ---Do you know our town?---No, this is the first time I _______ here.A. wasB. have beenC. cameD. am coming14. You can’t imagine _______ when they received these nice Christmas presents.A. how they were excitedB. how excited they wereC. how exciting were theyD. they were how exciting15. _______, the square looks more beautiful at night.A. With all the lights onB. Turning on all the lightsC. Let all the lights onD. Turn on all the lightsB)完形填空(共10小题;每小题1分,满分10分)请先阅读下面的短文,掌握其大意,然后在每小题所给的A、B、C、D四个选项中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。
2011-2012学年第二学期第二次模拟测试九年级英语试题时间:120分钟分值:120分第I卷选择题(共65分)一.听力理解(共25小题,每小题1分,满分25分)(一)听下面五个句子。
每个句子后有一个小题,从题中所给的A、B、C三个选项中选出作为恰当反映的选项。
并标在试卷的相应位置。
听完每个句子后,你都有10秒钟的时间来回答有关小题和阅读下一小题。
每个句子只读一遍。
1. A. It’s cheap.B. Y es,it’s expensive. C. They aren’t cheap.2.A. Sure. B. Here. C. A bag?3.A. It’s near here. B. We call it Price-Low. C. It’s a nice supermarket..4. A. Five, please. B. Five yuan, please. C. Five bottles, please.5. A. Eight twenty. B. Monday. C. May 5th.(二)听下面五个小对话。
每个对话后有一个小题,从题中所给的A、B、C三个选项中选出最佳选项。
并标在试卷的相应位置。
听完每个对话后,你都有10秒钟的时间来回答有关小题和阅读下一小题。
每个对话只读一遍。
6. What do they have for lunch today?A. Rice and fish.B. Fish and tofu.C. Rice, fish and tofu.7. Where are they talking?A. In a hospital.B. In a shop.C. In a park.8. What vegetable does the woman want?A. Some tomatoes.B. Some potatoes.C. Some carrots.9. What do they have for supper now?A. Some meat.B. Only a little bread.C. Some fish,meat and chicken.10. When does Lily go to school?A. From Monday to FridayB. From Monday to SaturdayC. On Monday (三)听下面一段对话。
闸北2012学年度第二学期九年级 数学学科期中练习卷(2013.4)(满分150分,考试时间100分钟)考生注意:1、本试卷含三个大题,共25题;2、答题时,考生务必按答题要求在答题纸规定的位置上作答,在草稿纸、本试卷上答题一律无效;3、除第一、二大题外,其余各题如无特别说明,都必须在答题纸的相应位置上写出证明或计算的主要步骤.一、 选择题(本大题共6题,每题4分,满分24分)【下列各题的四个选项中,有且只有一个选项是正确的,选择正确项的代号并填涂在答题纸的相应位置上.】1.23-的值是……………………………………………………………………( )(A )-9; (B )-6; (C )9; (D )6.2.下列二次根式中,属于最简二次根式的是……………………………………( ) (A )12; (B )14; (C )ba; (D )99+a . 3.如果关于x 的方程x 2-4x +m =0有两个不相等的实数根,那么在下列数值中,m 可以取的是…………………………………………………………………………( ) (A )3; (B )5; (C )6; (D )8.4.一个正多边形的中心角是45°,那么这个正多边形的边数是………………( ) (A )5; (B )6; (C )7; (D )8.5.某人在调查了本班同学的体重情况后,画出了频数分布图如图一.下列结论中,不)(A )全班总人数40人; (B )学生体重的众数是13;(C )学生体重的中位数落在50~55千克这一组; (D )体重在60~65千克的人数占全班总人数的101.6.将宽为1cm 的长方形纸条折叠成如图二所示的形状,那么折痕PQ 的长是( ) (A )1; (B )2;(C )33; (D )332.二、填空题:(本大题共12题,每题4分,满分48分) 【请将结果直线填入答题纸的相应位置】 7. 计算:(1-3)0= . 8. 已知函数11)(-=x x f ,那么)2(f = . 9. 用科学记数法表示:0.00036= . 10.因式分解:3a 2-6a = .11.点M (3,1)和点N (3,-1)关于 轴对称. 12.不等式x +2>2x +1的解集为 . 13 方程x x -=的解是 .14.若1、x 、2、3的平均数是3,这组数据的方差是 .15.甲有两张卡片,上面分别写着0、1,乙也有两张卡片,上面分别写着2、3,他们各取出一张卡片,则取出的两张卡片上写的数所得之和为素数的概率是 . 16.已知点D 、E 分别在△ABC 的边CA 、BA 的延长线上,DE ∥BC .DE ︰BC =1︰3,设DA a = ,试用向量a 表示向量CD ,CD= .17.我们假设把两边平方和等于第三边平方的两倍的三角形叫做奇异三角形.如果Rt △ABC 是奇异三角形,在Rt △ABC 中,∠C =90°,AB =c ,AC =b ,BC =a ,且b >a ,其中,a =1,那么b = . 18.如图三,在等腰△ABC 中,底边BC 的中点是点D ,底角的正切值是31,将该等腰三角形绕其腰AC 上的中点M 旋转,使旋转后的点D 与A 重合,得到△A ′B ′C ′,如果旋转后的底边B ′C ′与BC 交于点N ,那么∠ANB 的正切值等于 .三、解答题:(本大题共7题,满分78分) 19.(本题满分10分)解方程组:⎪⎩⎪⎨⎧=+=+-)2....(..........20)1.....(0652222y x y xy x20.(本题满分10分)已知:如图四,在⊙O 中,M 是弧AB 的中点,过点M 的弦MN 交弦AB 于点C ,设⊙O 半径为4cm ,MN=34cm ,OH ⊥MN ,垂足是点H . (1)求OH 的长度; (2)求∠ACM 的度数.21.(本题满分10分) 观察方程①:x +x 2=3,方程②:x +x 6=5,方程③:x +x12=7. (1)方程①的根为: ;方程②的根为: ;方程③的根为: ;(2)按规律写出第四个方程: ;此分式方程的根为: ; (3)写出第n 个方程(系数用n 表示): ;此方程解是: .22.(本题满分10分)为迎接“五一”节的到来,某食品连锁店对某种商品进行了跟踪调查,发现每天它的销售价与销售量之间有如下关系:如果单价从最高25元/千克下调到x 元/千克时,销售量为y 千克,已知y 与x 之间的函数关系是一次函数:(1)求y 与x 之间的函数解析式;(不写定义域) (2)若该种商品成本价是15元/千克,为使“五一”节这天该商品的销售总利润是200元,那么这一天每千克的销售价应定为多少元?23.(本题满分12分,第(1)小题7分,第(2)小题5分) 已知:如图五,△ABC 中,点D 、E 、F 分别在边 BC 、CA 、AB 上,FB AF =DCBD =EC AE: (1)若BE 平分∠ABC ,试说明四边形DBFE 的形状,并加以证明;(2)若点G 为△ABC 的重心,且△BCG 与△EFG的面积之和为20,求△BCG 的面积.24.(本题满分12分,第(1)小题7分,第(2)小题5分) 已知:如图六,抛物线y =x 2-2x +3与y 轴交于 点A ,顶点是点P ,过点P 作PB ⊥x 轴于点B .平移 该抛物线,使其经过A 、B 两点.(1)求平移后抛物线的解析式及其与x 轴另一交点C 的坐标;(2)设点D 是直线OP 上的一个点,如果∠CDP=∠AOP ,求出点D 的坐标.25.(本题满分14分,第(1)小题4分,第(2)小题5分,第(3)小题5分)已知:如图七,在梯形ABCD 中,AD ∥BC ,∠A =90°,AD =6,AB =8,sinC =54,点P 在射线DC 上, 点Q 在射线AB 上,且PQ ⊥CD ,设DP =x ,BQ =y .(1)求证:点D 在线段BC 的垂直平分线上; (2)如图八,当点P 在线段DC 上,且点Q 在线 段AB 上时,求y 关于x 的函数解析式,并写出定义域;(3)若以点B 为圆心、BQ 为半径的⊙B 与以点C 为圆心、CP 为半径的⊙C 相切,求线段DP 的长.闸北区 2012学年第二学期九年级质量抽测卷(2013年4月)答案及评分参考(考试时间:100分钟,满分:150分)一、选择题(本大题共6题,每题4分,满分24分)二、填空题(本大题共12题,每题4分,满分48分)7、1. 8、12+ . 9、4106.3-⨯. 10、)2(3-a a . 11、x . 12、x <1 . 13、x=0. 14、27. 15、43. 16、4-. 17、2. 18、43.三、解答题(本大题共7题,满分78分) 19、(本题满分10分) 解:由①得:(x-2y )(x-3y)=0 ……………………(2分)x-2y=0,x-3y=0 …………………………………(2分)原方程可写为:⎩⎨⎧=+=-200222y x y x ⎩⎨⎧=+=-20322y x y x …………………(2分) 所以,此方程组的解是⎩⎨⎧==2411y x ⎩⎨⎧-=-=2422y x ⎪⎩⎪⎨⎧==22333y x ⎪⎩⎪⎨⎧-=-=22344y x ………(4分)20、(本题满分10分,第(1)小题5分,第(2)小题5分,)解:联结MO 交弦AB 于点E ………………………(1分) (1)∵OH ⊥MN ,O 是圆心 ………………………(1分) ∴MH=21MN …………………………………(1分) 又∵MN=34cm ,∴MH=32 cm ………(1分) 在Rt △MOH 中,OM=4 cm ∴OH=2)32(42222=-=-MH OM cm ………(1分)(2) ∵M 是弧AB 的中点,MO 是半径 ………………(1分) ∴MO ⊥AB ……………………………………(1分) ∵在Rt △MOH 中,OM=4 cm, OH=2 cm ∴OH=21MO ……………………………………(1分) ∴∠OMH=30° ……………………………………(1分) ∴在Rt △MEC 中, ∠ECM=90°- 30°= 60°…………(1分)21、(本题满分10分,第(1)小题6分,第(2)小题2分,第(3)小题2分) 解:(1)方程①根:x 1=1,x 2=2;…………………………………(2分)方程②根:x 1=2,x 2=3;…………………………………(2分) 方程③根:x 1=3,x 2=4;…………………………………(2分)(2)方程④:x +x20=9;方程④根:x 1=4,x 2=5.………(2分) (3)第n 个方程:x +xn n )1(+=2n +1.此方程解:x 1=n ,x 2=n +1.…(2分)22、(本题满分10分,第(1)小题5分,第(2)小题5分) (1)设y =kx +b (k ≠0),将(25,30)(24,32)代入得:……………(1分)⎩⎨⎧=+=+32243025b k b k …………………………………(1分) 解得: ⎩⎨⎧=-=802b k …………………………………(2分)∴y =-2x +80. …………………………………(1分)(2)设这一天每千克的销售价应定为x 元,根据题意得:(x -15)(-2x +80)=200,………………………………(2分) x 2-55x +700=0, ………………………………(1分) ∴x 1=20,x 2=35. ………………………………(1分) (其中,x =35不合题意,舍去)答:这一天每千克的销售价应定为20元. ……………(1分)23、(本题满分12分,第(1)小题7分,第(2)小题5分) (1)四边形DBFE 是菱形………………………………(1分) 证明:∵△ABC 中,FB AF =DCBD =EC AE, ∴FE ∥BC ,DE ∥AB ………………………………(2分)∴四边形DBFE 是平行四边形………………………(1分) 又∵BE 平分∠ABC ∴∠FBE =∠DBE∵ FE ∥BC ∴∠FEB =∠DBE ………………………(1分) ∴∠FBE =∠FEB ………………………………(1分) ∴BF=EF ……………………………(1分) ∴四边形DBFE 是菱形(2)∵FE ∥BC ,∴△EFG ∽△BCG …………………(1分)∴BCG EFG S S ∆∆=2⎪⎭⎫ ⎝⎛GC FG ……………………(1分) ∵点G 为△ABC 的重心, ∴GC FG =21, ……………………(1分)∴BCG EFG S S ∆∆=221⎪⎭⎫⎝⎛=41,∴S △BCG =4S △EFG .……(1分)∵S △EFG +S △BCG =20,∴S △BCG =16………………(1分)24、(本题满分12分,第(1)小题7分,第(2)小题5分) 解:(1)∵抛物线y =x 2-2x +3与y 轴交于 点A ,顶点是点P ,过点P 作PB ⊥x 轴于点B . ∴A (0,3)、P (1,2)、B (1,0) ……………(3分) 设平移后抛物线的解析式为y =x 2+bx +c (如图①), 将点A (0,3)、B (1,0)的坐标代入,得b =-4,c =3, ……………(2分) ∴平移后抛物线的解析式为抛物线y =x 2-4x +3……(1分) 令y=0得x 1=1,x 2=3 ∴点C (3,0). ……………(1分)(2)(如图②),直线OP 过P (1,2)∴直线OP 解析式为y =2x ……………(1分) ∵D 是直线OP 上的一个点,且∠CDP =∠AOP , ∠AOP =∠OPB, ∴∠OPB=∠CDP(ⅰ)作C D 1⊥x 轴,交直线OP 于点D 1 PB ∥C D 1,OC=3,OB=1,可得C D 1=3BP∴点D 1(3,6) ……………(2分)(ⅱ)∠PD 2C =∠OPB, ∠PD 2C =∠C D 1P, ∴C D 2=C D 1且CD =6. 设点D 2(x ,2x ),则C D 2=6,即22)02()3(-+-x x =6,∴x 1=3,x 2=59-, ∴点D 1(3,6)、D 2(-59,-518).…………(2分)25、(本题满分14分,第(1)小题4分,第(2)小题5分,第(3)小题5分) 解:(1)作DH ⊥BC 于H (见图①) …………(1分)在梯形ABCD 中,AD ∥BC ,∠A =90°,∴∠B =90°, ∠BHD=90° ∴四边形ABHD 是矩形∴DH=AB ,BH=AD …………(1分) 又∵AD =6,AB =8 ∴DH=8,BH=6在Rt △DHC 中, sinC =54,可设DH=4k, DC=5k ∴DC=10, HC=681022=-,∴BH=HC=6 …………(1分) 又∵DH ⊥BC∴点D 在线段BC 的垂直平分线上 …………(1分) (2)延长BA 、CD 相交于点S (见图②), …………(1分)∵AD ∥BC 且BC =12 ∴AD=21BC ∴21===BC AD SC SD SB SA ∴SD=DC=10,SA=AB=8 ∵DP =x ,BQ =y, SP=x+10 由△SPQ ~△SAD 得45==SA SD SP SQ ………(1分) ∴)10(45+=x SQ …………(1分) 2745)10(4516+-=+-=x x BQ∴所求解析式为2745+-=x y , …………(1分)定义域是0≤x ≤514…………(1分)(说明:若用勾股定理列出:222222PC BC QB DP AQ AD -+=-+亦可,方法多样.)(3)由图形分析,有三种情况:(ⅰ)当点P 在线段DC 上,且点Q 在线段AB 上时,只有可能两圆外切,由BQ+CP=BC ,12102745=-++-x x ,解得32=x (ⅱ)当点P 在线段DC 上,且点Q 在线段AB 的延长线上时,两圆不可能相切,…………(2分) (ⅲ)当点P 在线段DC 的延长线上,且点Q 在线段AB 的延长线上时,此时2745-=x BQ , CP = x-10 …………(1分) 若两圆外切,BQ+CP=BC ,即12102745=-+-x x ,解得334=x …………(1分)若两圆内切,BC CP BQ =-,即12)10(2745=---x x 12)10(2745=---x x 解得22=x12)10(2745-=---x x 解得74-=x (不合题意舍去) …………(1分)综上所述,⊙B 与⊙C 相切时,线段DP 的长为32,334或22 .。
更多精彩资料请关注教育城中考网:/zhaokao/zk/2012年杭州市各类高中招生文化考试上城区二模试卷数 学考生须知:1.本试卷分试题卷和答题卷两部分,满分120分,考试时间100分钟.2.答题时,必须在答题卷密封区内写明校名,姓名和准考证号.3.所有答案都必须做在答题卷标定的位置上,务必注意试题序号和答题序号相对应.4.考试结束后,上交试题卷和答题卷.试 题 卷一.仔细选一选 (本题有10个小题, 每小题3分, 共30分)下面每小题给出的四个选项中, 只有一个是正确的,注意可以用多种不同的方法来选取正确答案.1. 下列运算正确的是A .164=±B .164-=-C .44-=-D .2416-= 2. 如图,AB //CD ,EF ⊥AB 于E ,EF 交CD 于F ,已知∠1=63°,则∠2=A .63°B .53°C .37°D . 27°3. 设A ,B 表示两个集合,我们规定“A ∩B ”表示A 与B 的公共部分,并称之为A 与B 的交集.例如:若A ={正数},B ={整数},则A ∩B ={正整数}. 如果A ={矩形},B ={菱形},则所对应的集合A ∩B 是A .{平行四边形}B .{矩形}C .{菱形}D .{正方形}4. 某厂生产世博会吉祥物“海宝”纪念章8万个,质检部门为检测这批纪念章质量的合格情况,从中随机抽查300个,合格298个.下列说法正确的是 A .总体是8万个纪念章,样本是300个纪念章B .总体是8万个纪念章的合格情况,样本是300个纪念章的合格情况C .总体是8万个纪念章的合格情况,样本是298个纪念章的合格情况D .总体是8万个纪念章的合格情况,样本是1个纪念章的合格情况5. 解关于x 的不等式⎩⎨⎧-<>a x a x ,正确的结论是A .无解B .解为全体实数C .当a >0时无解D .当a <0时无解(第2题)6. 某市2005年至2011年国内生产总值年增长率(%)变化情况如统计图,从图上看,下列结论中不正确的是 A .2005年至2011年,该市每年的国内生产总值有增有减. B . 2005年至2008年,该市国内生产总值的年增长率逐年减小.C . 自2008年以来,该市国内生产总值的年增长率开始回升.D . 2005年至2011年,该市每年的国内生产总值不断增长.7. 如图,在直角坐标系中,⊙O 的半径为1,则直线25y x =-+与⊙O 的位置关系是 A.相离 B.相交 C.相切 D.无法确定 8. 如图,在等腰直角三角形ABC 中,∠C =90°,AC =6,D 是AC 上一点,若tan ∠DBA =15,则sin ∠CBD 的值为 A.33B.21C.13132 D.13133 9. 已知四条直线y =kx -3,y =-1,y =3和x =1所围成的四边形的面积是8,则k 的值为A .43或-4 B .43-或4 C .43或-2 D .2或-2 10.如图,AB 是半圆直径,半径OC ⊥AB 于点O ,AD 平分∠CAB 交弧BC 于点D ,交OC 于点E ,连结CD ,OD .给出以下四个结论:①S △DEC =2S △AEO ;②AC ∥OD ;③线段OD 是DE 与DA 的比例中项;④AB CE CD ⋅=22.其中结论正确的是A. ①②③B. ①②④C. ②③D. ②④ 二、认真填一填(本题有6个小题,每小题4分,共24分) 要注意认真看清题目的条件和要填写的内容,尽量完整地填写答案. 11. 如果()222+=2b a +(a ,b 为有理数),那么b a +等于 .12. 如图,二次函数21y ax bx c =++和一次函数2y mx n =+的图象,观察图象,写出y 2≤y 1时x 的取值范围 . 13. 已知_________,311的值为代数式yxy x y xy x x y -+--=-.(第6题)(第10题)(第12题)第7题14. 一张圆桌旁有四个座位,甲先坐在如图所示的座位上,乙,丙,丁三人随机坐到其他三个座位,则甲与乙不相邻而坐的概率为 .15. 如图,已知直角三角形OAB 的直角边OA 在x轴上,双曲线)0(1>=x xy 与直角边AB 交于点C ,与斜边OB 交于点D ,OB OD 31=,则△OBC 的面积为 .16. 如图,⊙O 的半径OD 经过弦AB (不是直径)的中点C ,OE //AB 交⊙O 于点E ,PE ∥OD ,延长直径AG ,交PE 于点H ,直线DG 交OE 于点F ,交PE 于K .若EF =2,FO =1,则KH 的长度等于 .三.全面答一答(本题有7个小题,共66分)解答应写出文字说明、证明过程或推演步骤. 如果觉得有的题目有点困难,你们把自己能写出的解答写出一部分也可以. 17.(本小题满分6分)写出一个只含字母x 的代数式,要求(1)要使此代数式有意义,字母x 必须取全体大于1的实数,(2)此代数式的值恒为负数.18.(本小题满分8分)某校九年级学生共600人,为了解这个年级学生的体能,从中随机抽取部分学生进行1分钟的跳绳测试,并指定甲,乙,丙,丁四名同学对这次测试结果的数据作出整理,下图是这四名同学提供的部分信息:甲:将全体测试数据分成6组绘成直方图(如图). 乙:跳绳次数不少于105次的同学占96%.丙:第①,②两组频率之和为0.12,且第②组与第⑥组频数都是8. 丁:第②,③,④组的频数之比为4:17:15. 根据这四名同学提供的材料,请解答如下问题: (1)这次跳绳测试共抽取多少名学生?(2)如果跳绳次数不少于135次为优秀,根据这次抽查的结果,估计全年级达到跳绳优秀的人数为多少?(第14题)(第16题)(第15题)(第18题)19.(本小题满分8分)如图①,P 为△ABC 内一点,连接P A ,PB ,PC ,在△P AB ,△PBC 和△P AC 中,如果存在一个三角形与△ABC 相似,那么就称P 为△ABC的自相似点.已知△ABC 中,∠A <∠B <∠C(1)利用直尺和圆规,在图②中作出△ABC 的自相似点P (不写作法,但需保留作图痕迹);(2)若△ABC 的三内角平分线的交点P 是该三角形的自相似点,求该三角形三个内角的度数.20.(本小题满分10分)将正六边形纸片按下列要求分割(每次分割,纸片均不得有剩余).第一次分割:将正六边形纸片分割成三个全等的菱形,然后选取其中的一个菱形再分割成一个正六边形和两个全等的正三角形;第二次分割:将第一次分割后所得的正六边形纸片分割成三个全等的菱形,然后选取其中的一个菱形再分割成一个正六边形和两个全等的正三角形;按上述分割方法进行下去……(1)请你在图中画出第一次分割的示意图;(2)若原正六边形的面积为a ,请你通过操作和观察,将第1次,第2次,第3次分割后所得的正六边形的面积填入下表:分割次数(n ) 1 2 3 …… 正六边形的面积S n(3)观察所填表格,并结合操作,请你猜想:第n 次分割后所得的正六边形面积S n 与分割次数n 有何关系?(S n 用含a 和n 的代数式表示,不需要写出推理过程).21.(本小题满分10分)某校为开展“阳光体育”活动,计划拿出不超过3600元的资金购买一批篮球,足球和排球.已知篮球,足球,排球的单价比为9:6:4,且其单价和为190元.① ② (第19题)(第20题)(1)请问篮球,足球,排球的单价分别为多少元?(2)若要求购买篮球,足球,排球的总数量为50个,篮球数量是排球数量的2倍,且足球不超过10个,请问有几种购买方案?22.(本小题满分12分)如图,△ABC 中,∠BAC =90°,正方形的一边GF 在BC 上,其余两个顶点D ,E 分别在AB ,AC 上.连接AG ,AF 分别交DE 于M ,N 两点. (1)求证:GFMNBG DM =. (2) 求证:EN DM MN ⋅=2. (3)若AB=AC=2,求MN 的长.23.(本小题满分12分)已知抛物线234y x x =-++交y 轴于点A ,交x 轴于点B ,C (点B 在点C 的右侧).过点A 作垂直于y 轴的直线l. 在位于直线l 下方的抛物线上任取一点P ,过点P 作直线PQ 平行于y 轴交直线l 于点Q .连接AP .(1)写出A ,B ,C 三点的坐标; (2)若点P 位于抛物线的对称轴的右侧:①如果以A ,P ,Q 三点构成的三角形与△AOC 相似,求出点P 的坐标;②若将△APQ 沿AP 对折,点Q 的对应点为点M .是否存在点P ,使得点M 落在x 轴上.若存在,求出点P 的坐标;若不存在,请说明理由.2012年上城区二模数学评分标准及参考答案一、选择题(每题3分,共30分)题号 12 3 4 5 6 7 8 9 10 答案 BD D B CACCAD二、填空题(每题4分,共24分)(第22题)(第23题)11. 10 ; 12. 21-≤≥x x 或; 13.21; 14.31; 15. 4 ; 16. 2 . 三、解答题 17.(满分6分)答案为形如11-⋅x m (m 为负实数)的均可.---------------6分 (满足条件(1)“要使此代数式有意义,字母x 必须取全体大于1的数”得3分; 满足条件(2)“此代数式的值恒为负数”得3分.) 18.(满分8分)(1)解:(1)第①组频率为1-96%=0.04,∴第②组频率为0.12-0.04=0.08,10008.08=,∴这次跳绳测试共抽取学生人数为100人. -------------------4分 (2)第⑤,⑥两组的频率之和为0.16+0.08=0.24, 14460024.0=⨯ ∴估计全年级达到跳绳优秀的有144人.-----------------------4分 19.(满分8分)(1)①作图(略). ---------------------------------------- 4分 作法如下:(i )在∠ABC 内,作∠CBD =∠A ;(ii )在∠ACB 内,作∠BCE =∠ABC ;BD 交CE 于点P . 则P 为△ABC 的自相似点.②连接PB,PC .∵P 为△ABC 的内心,∴12PBC ABC ∠=∠,12PCB ACB ∠=∠.P 为△ABC 的自相似点,由条件可知,只能是△BCP ∽△ABC . ∴∠PBC =∠BAC ,∠BCP =∠ABC=2∠PBC =2∠BAC , ∠ACB =2∠BCP=4∠BAC .∵∠BAC+∠ABC+∠ACB =180°.∴∠BAC+2∠BAC+4∠BAC =180°,∴7180oBAC =∠.----------------2分∴该三角形三个内角的度数分别为1807,3607,7207.----------- 2分20.(满分10分)(1)解:(1) ----------------------------------------------2分(2)--------------6分(3)nn aS 4=--------------------------------------------------- 2分 21.(满分10分)解:⑴篮球,足球和排球的单价比为9︰6︰4,设它们的单价分别为x 9元,x 6元,x 4元.由题意得130469=++x x x ,解得10=x .故篮球,足球和排球的单价分别为90元,60元和40元. ---------------------------------------------------------------------------------- 4分 ⑵设购买排球y 个,则篮球y 2个,足球(50-y-2y)个.根据题意得⎩⎨⎧≤--≤+⨯+②10250①36002y)-y -60(502y 9040y y y -------------------------------------------2分 由不等式①,得15≤y ,由不等式②,得3113≥y , ∴不等式组的解集为153113≤≤y .因为y 是整数,所以y 只能取14或15.-------2分 因此,一共有两个方案:方案一,当14=y 时,排球购买14个,篮球购买28个,足球购买8个;------1分 方案二,当15=y 时,排球购买15个,篮球购买30个,足球购买5个.------1分 22.(满分12分)(1)证明:∵四边形DGFE 是正方形,∴DN ∥BF , ∴△ADM ∽△ABG , ----------------------1分∴AG AMBG DM =,同理可得AG AM GF MN =. -----2分 ∴GFMN BG DM =. ------------------------ 1分 (2)证明:由(1)可知GF MN BG DM =,同理也可以得到GFMNFC NE =, ∴GF BG MN DM =,NEMN FC GF =.-----------------2分 ∵∠B +∠C =90°,∠CEF +∠C =90°. ∴∠B =∠CEF ,分割次数(n ) 1 2 3 ……正六边形得面积S n4a 16a 64a ……又∵∠BGD =∠EFC =Rt ∠, ∴△BGD ∽△EFC . ∴FCEFDG BG =.-----------1分 ∵DG ,GF ,EF 是同一个正方形的边长,∴DG =GF =EF . ∴FCGFGF BG =∴NEMN MN DM =, ∴MN 2=DM ·EN -----------1分 (3) ∵2,90==︒=∠AB AC BAC ∴22=BC --------1分 ∵∠B=∠C =45o , 四边形DEFG 是正方形, ∴322=====FC EF GF DG BG ----------------------1分 ∵ 由(1)(2)可得FCNEGF MN BG DM == ∴922===EN MN DM ---------------------------------2分23.(满分12分)(1)A (0,4),B (4,0),C (-1,0) -------------------3分 (2) ①AQ AO AQ COQP CO QP AO ==或 --------------------2分 2431x x x =-2134x x x =-或 解得134x =或7x =, 均在抛物线对称轴的右侧.---2分 ∴点P 的坐标为1351(,)-416或(7,24).---------------1分 ② Q (x ,4) ,P (x ,2-34x x ++) ----------------1分PQ =23x x -=PM ,△AEM ∽△MFP . 则有AM MPME PF=. ∵ME =OA =4,AM=AQ =x ,PM =PQ =23x x -,所以234x x xPF-=.得PF =4x -12,∴ OM =(4x -12)-x =3x -12. Rt △AOM 中,由勾股定理得222OM OA AM +=,(图1)(图2)∴222(312)4x x -+=,解得x 1=4,x 2=5.,均在抛物线对称轴的右侧. -----------2分 ∴点P 的坐标为(4,0)或(5,-6).--------------------------------------1分更多精彩资料请关注教育城中考网:/zhaokao/zk/。
大连市2012年初中毕业升学考试试测(二)数学 参考答案及评分标准一、选择题1.D ; 2.A ; 3.C ; 4.A ; 5.B ; 6.B ; 7.C ; 8. D . 二、填空题9.2; 10.6a ; 11. 2=x ; 12.十; 13.120 ; 14.81; 15.8; 16. 87. 三、解答题17.解:原式=24)1222(3++-- ……………………………………………………8分=26..………………………………………………………………………9分 18.解:yx y x y x y x y +-+÷-=))(()(原式 ……………………………………………………4分yx y x y -⋅-=1)( …………………………………………………………………7分 =y . ……………………………………………………………………………… 9分19.证明:∵四边形ABCD 是等腰梯形,∴AB =DC ,∠BAD =∠CDA ,∠B =∠C . …………3分 ∵∠EAD =∠EDA ,∴∠BAD -∠EAD =∠CDA -∠EDA ,即∠BAE =∠CDE . ………………………………5分 ∴△ABE ≌△DCE . ……………………………7分 ∴BE =CE . ……………………………………9分 20.解:(1)100;14;0.61 . ……………………………………………………………6分 (2)0.25×360°=90°, ………………………………………………………………8分答:“非常了解”对应的扇形圆心角为90°. …………………………………………9分(3)1200×10061×100% = 732,………………………………………………………11分答:估计该校学生中“比较了解”海啸知识的人数是732人. …………………12分四、解答题21. 解:(1)x x x x y 252502+-=⎪⎭⎫ ⎝⎛-⋅=. ………………………………………………3分 (2)假设能围成面积为160 cm 2的矩形,则-x 2+25x =160,x 2-25x +160=0.………………………………… …………………………………5分∵△=b 2-4ac =(-25)2-4×1×160 = -15<0, ……………………………………7分∴方程没有实数根, …………………………………………………………………8分∴不能围成面积为160cm 2的矩形. …………………………………………………9分22.解:(1)180 ;60.……………………………………………………………………2分 (2)设乙车的速度是乙v 千米/时,则E CD B A乙)(v ⨯=-⨯6080311180, …………………………………………………………………5分∴v 乙= 90. ……………………………………………………………………………6分∴329018031=÷⨯.………………………………………………………………………8分答:乙车到达A 地还需行驶32小时. ………………………………………………9分 23.(1)CD 是⊙O 的切线. ……………………………………………………………1分 证明:连接OD .则∠BOD =2∠DEB =2⨯45︒=90︒.…………………………………2分∵四边形ABCD 是平行四边形,∴AB //DC ,………………………………………………………………………………3分∴∠CDO =180︒-∠BOD =180︒-90︒=90︒, ∴OD ⊥CD ,∴CD 是⊙O 的切线.…………………………………………………………………4分(2)连接AE 、BD ,则∠ABE =∠ADE . ∵四边形ABCD 是平行四边形,∴AB =DC=6. ∵AB 是⊙O 的直径,∴∠AEB =90︒. …………………………………………6分在Rt △ABE 中,cos ∠ABE =AB BE = cos ∠ADE =32.∴6BE =32,∴BE =22.……………………………………………………………………………7分∵BF ⊥DE , ∴∠BFE =90︒.∴BF= BE·sin 45︒=22222=⨯. ……………………………………………………8分∵∠BOD =90︒,OB=DO=3,∴23332222=+=+=OD OB BD , …………………………………………………9分 ∴142)23(2222=-=-=BF BD DF .……………………………………………10分 五、解答题24. 解:(1)由题意得 BD=2t ,CE =t .①当点D 在点E 的右侧时(如图1),∵△DEF 是等边三角形, ∴DE=DF ,∠EDF =60°. ∴∠DFB =∠EDF -∠B =60°-30°=30°=∠B ,∴DF =DB=2t . ……………………………………………………………………………2分 ∵BC =CE +ED +DB 即 t +2t +2t =15 ,∴ t =3. ……………………………………………………………………………………3分 ②当点D 在点E 的左侧时(如图2),由①得,DE =EF =EB = CB -CE = 15-t ,BD = 2t , ∴DB =2BE , 即2t = 2(15-t ), ∴ t =215. 综上,当t =3s 或215s 时,点F 恰好在AB 上. ……… 5分 图1 DC BE 图(D )C BEHCB(2) ①当0≤t ≤3时(如图3),由(1)得,DE =EF =FD =15-3t =3(5-t ),DH =DB=2t ,∴FH =15-3t -2t=15-5t =5(3-t ). …………………………………………………… 6分∵∠DEF =∠EFD = 60°,∠B =30°, ∴∠EGB =180°-∠GEB -∠B =180°-60°-30°=90°.在Rt △FGH 中,GH =FH·sin60°=)3(235t -, FG =FH·cos60°=)3(25t -. ∴2)3(832521t GH FG S FGH -=⋅=∆.………………………………………………… 7分 作FM ⊥DE ,垂足为M . 则FM =EF·sin60°=)5(233t -.2)5(43921t FM ED S FED -=⋅=∆, ……………………………………………………… 8分∴FG H FED S S S ∆∆-==3822543158372+--t t . …………………………………… 9分②由题意知,点D 从点B 运动到点C 所用时间为s 215.当t +2t =15,即t =5时,点D 与点E 重合.由(1)知,当3<t ≤215,且t ≠5时,无论点D 在点E 的左侧还是右侧,△DEF都在△ABC 内(如图4).FM DE S S FED ⋅==∆21=342252345439)5(43922+-=-t t t .综上,⎝⎛≠≤<+-≤≤+--=).52153(342252345439)30(38225431583722t t t t t t t S ,且…………11分25.猜想:线段DF 垂直平分线段AC ,且AC DF 21=.……………………………… 2分证明:过点M 作MG ∥AD ,与DF 的延长线相交于点G .则∠EMG =∠N ,∠BMG =∠BAD .…………………………………………………… 3分∵∠MEG =∠NED ,ME =NE , ∴△MEG ≌△NED ,∴MG =DN .…………………………………………………………………………… 4分∵BM = DN ,∴MG = BM . ………………………………………………………………………… 5分作GH ⊥BC ,垂足为H ,连接AG 、C G . ……………6分 ∵四边形ABCD 是正方形,∴AB=BC=CD=DA , ∠BAD =∠B =∠ADC =90︒,…… 7分 ∵∠GMB =∠B =∠GHB =90︒,∴四边形MBHG 是矩形. ……………………………8分∵MG =MB ,图图M D C BE∴四边形MBHG 是正方形, …………………………9分 ∴MG = GH= BH= MB , ∠AMG =∠CHG =90︒ ,∴AM=CH ,……………………………………………………………………………10分∴△AMG ≌△CHG .∴GA=GC .……………………………………………………………………………11分又∵DA=DC ,∴DG 是线段AC 的垂直平分线. ∵∠ADC =90︒,DA=DC , ∴AC DF 21=.即线段DF 垂直平分线段AC ,且AC DF 21=. ……………………………………12分26.解:(1)由题意得B (1,0),C (-3,-1),D (0,-1).……………………1分设直线AC 的解析式为y = kx +b ,则 ⎩⎨⎧+--=+3,3k bk b 解得⎪⎪⎧-=,21k ∴2521--=x y . ……………………2分∴点E 、F 的坐标分别是(-5,0),(0,25-)设所求抛物线的解析式为y =a (x -1)(x +5),∴,5)1(25⨯-⋅=-a 即a =21.∴252212-+=x x y .(2)连接BD 并延长,与抛物线的交点即为所求点M . 设直线BD 的解析式为y =k 1x +b 1,则 ⎩⎨⎧-==+.1,0k 111b b 解得⎩⎨⎧-==.1,1k 11b ∴y=x -1. ………………………………………………………………………………5分设点M 的坐标为(m ,m -1),∴ 2522112-+=-m m m , …………………………………………………………6分解得m 1=-3,m 2=1 (舍去).即点M 的坐标为(-3,-4). ……………………………………………………7分(3)作点D 关于直线AC 的对称点P ,DP 与AC 相交于点G ,连接BP . 则BP 长即为所求的最小值.由(1)知,OE =5,OF =25,OD =1, ∴ DF =23,EF =525)25(522=+.…………8分∵∠DGF =∠EOF =90︒ , ∠DFG =∠EFO ,xx∴△DGF ∽△EOF . ∴OF GF EF DF EO DG == ,………………………9分 ∴DG =553=⋅EF DF EO ,GF =5103=⋅EF DF OF . ∴DP =2DG =556. …………………………………………………………………10分 作PQ ⊥y 轴,PH ⊥x 轴,垂足分别为Q 、H .同理可证 △DPQ ∽△EFO , ∴FOPQ EO DQ EF DP ==, ∴PQ =56=⋅EF FO DP ,DQ =512=⋅EF EO DP . ∴HO =PQ =56,PH =OQ =517. ………………………………………………………11分 ∴5410)517()561(22=++=BP . ……………………………………………………12分 A FG P Q。
2012上海各区县二模考试题答案(2012-04)1奉贤P32浦东P63静安P84 青浦P115 黄浦P146 松江P157 普陀P188 虹口P209 长宁P2310徐汇P2611金山P2812闵行P3113 宝山P33一、杨浦(崇明)Part 1 ListeningI. Listening comprehensionA. Listen and choose the right picture1. Jack finds it interesting to keep fish as pets in his spare time. (B)2. People from all over the world enjoy traveling in Shanghai. (G)3. Jim and his father plant trees on Tree Planting Day every year. (F)4. The children sometimes fly kites happily in the park in spring. (E)5. It is raining heavily again. I hate such wet weather in Shanghai. (D)6. Mike volunteers to deliver newspapers and letters every morning. (C)B. Listen to the dialogue and choose the best answer to the question you hear7. M: Hi, Sarah! A nice day, isn't it?W: Yes, but tomorrow won't be a good day for a picnic. It will rain heavily.Q: What will the weather be like tomorrow? (D)8. M: What subject do you like best, Lucy?W: Music. What' s yours, Tim?M: Well, I like art and Chinese.Q: What is Lucy's favorite subject? (B)9. M: Rose, you'll have to go to school by yourself. My car doesn't work today.W: OK, Dad. I can ride my new bicycle.M: Take care, then.Q: How is Rose going to school today? (A)10. M: Excuse me, is this shop open on Sundays?W: Yes, of course.M: What time does it usually open?W: It usually opens at seven thirty during weekdays but an hour later on Saturdays and Sundays.Q: When does the shop open at the weekends? (C)11. M: Could you please tell me how to pronounce the word in English?W: Sorry, I'm not quite sure. Let's look it up in a dictionary.M: Good idea. Here's my dictionary.Q: What are they going to do then? (A)12. M: What's wrong with David?W: He has a bad headache.M: A headache? How did he get it?W: He went over his lessons the whole night. He was preparing for the exam.Q: Why doesn't David feel well? (D)13. W: What about some more dumplings?M: No, thank you. I'm full.Q: What does the man mean? (B)14. W: Can I help you?M: I want to buy a pair of sports shoes for my son.W: What size?M: Forty-one.Q: What is the probable relationship between the two speakers? (C)15. W: Where are you going, Tom?M. I'm going to the bookshop.W: Is it far from here?M: Yes, I have to take a bus there. Here comes the bus. I must get on. Bye!Q: Where does the dialogue most probably take place? (A)16. W: Could you finish your work at four?M: What's the time now?W: It's almost half past three.M: I think I can finish it then.Q: How soon will the man finish his work? (D)C. Listen to the passage and tell whether the following statements are true or falseA traveling salesman came upon an old farmer sitting in front of his house, next to the farmer was a pig with only one leg. The salesman suddenly became very interested in the pig."Excuse me sir, but why does your pig only have one leg?" asked the salesman."Well, I'll tell you. One day I was out working on the farm when my tractor overturned. I was underneath the tractor and I was losing blood. With nobody around to help, I thought I would die when that pig came. He dug and rooted around with his nose till he got me out and he pulled me back to the house. He saved my life."Wow, that's really amazing," said the salesman, but I still don't know why the pig only has one leg.""Well, I'll tell you," said the farmer. "One night, my wife and I were asleep at about 3 a.m. when a fire broke out in the kitchen. That pig broke the door and came into our bedroom. It woke us up and got us out before the fire could get us. He saved our lives again!""Well, that's really great but why does the pig only have one leg?"Well, when you get a pig that smart, you don't want to eat him all at once!"(17. F 18. T 19. F 20. F 21. T 22. T 23. T)D. Listen to the passage and complete the following sentences :The oldest school in the United States, Boston Latin, opened in 1635. Before that, most kids were taught what they needed to learn at home.When you learn reading, math, and other subjects taught in school from your parents or private teachers who come to your house, it's called homeschooling. A kid may be the only one, or he or she may be taught with brothers, sisters, or kids from the neighborhood.Parents choose to home school their children for many different reasons. Sometimes a kid is sick and can't go to regular school. But more often, kids are homeschooled because their parents feel they can give their child a better education than the local school can.You might wonder if kids have to go to school. It's true that kids must be educated, but the law allows the kids to be schooled at home. In fact, more than 1.3 million students do it in the USA alone. These kids can learn just as much as they do in regular schools, but their parents are in charge of their education.Homeschool parents must make sure that their kids get the instruction and the experiences they need. The parents also may have to write a report every year to explain to the government who's teaching the kid and which subjects are being taught at home.(24. 1635 25. math 26. sick 27. local 28. 1.3 29. law 30. report )Part 2II. 31. A 32. D 33. B 34. A 35. A 36. B 37. C 38. D 39. B 40. C 41. D 42. D 43.C 44.D 45. A 46. D 47. B 48. D 49. A 50. CIII. 51. c 52. E 53. G 54. H 55. B 56. F 57. A 58. DIV. 59. fifth 60. potatoes 61. yourself 62. changeable 63. Luckily 64. dishonest 65. pleasure 66. succeedV.67. Did, do 68. How does 69. do they 70: is published 71. so, that 72. how to 73. spent, flyingPart 3VI. A)74. D 75. B 76. A 77. B 78. C 79. DB) 80. B 81. A 82. C 83. D 84. B 85. CC) 86. allowed 87. short 88. leave 89. back 90. record 91. another/any 92. less/lightD) 93. Her friend, Jody 94. At around/By 9:00 p. m. 95. He deleted it.96. She felt tired. 97. Because it was too late/the store was already closed.98. That's all right, I can read your paper on the computer./Next time, you had better save the paper on the computer first.(Any reasonable answer is acceptable)二、奉贤I. Listening comprehensionA. Listen and choose the right picture1. Mary practises listen by listening to English programs on the radio every day. (D)2. The policeman is telling Tom not to cross the roads when the traffic light is red. (G)3. Computers are one of the most wonderful machines in the twentieth Century. (E)4. Students should listen to the teacher carefully in class. (A)5. My cousin Tim is fond of playing on-line games on the computer. (F)6. Mrs. Green finds it tiring to pack all the things in the office. (B)B. Listen to the dialogue and choose the best answer to the question you hear7. W: Would you like some coffee or tea?M: I like both. But now I just want some water.Q: What's the man going to drink? (A)8. W: It's windy today, isn't it?M: Yes, the weather here in winter is always like this.Q: What's the weather like here in winter? (D)9. W: Look, Dad. It' s raining heavily.M. Yes. It's dangerous for you to ride your bike to school. You'd better take a bus, Mary.Q. How will Mary go to school this morning? (C)10. W. What time do you usually get up in the morning during weekdays. Mike?M. At 6:10 (Six ten). But yesterday morning I got up half an hour late. Something was wrong with my watch.Q. What time did Mike get up yesterday morning? (C)11. W. What has happened to you, Mike?M. I've lost my mobile phone on my way to school.Q. How does Mike probably feel? (B)12. W. How many students are there in your class?M: There are forty.W. Does every student have his own computer?M: No, 90% of us have computers of our own.Q: How many students have their own computers? (C)13. W. What' s wrong with you, young mail?M. I don't feel well and cough day and night.W. Take the medicine and you will be all right soon.Q. What's the relationship between the two speakers? (C)14. W. Can I help you, sir?M. Yes, please. I'd like a hamburger and a small cake, please.W. Here you are. It's 9 dollars altogether.M. Here's tile money.W. Thank you. Shall I find a seat for you'?M. No, thanks. I'd like to have it in my car.Q. Where are they talking? (B)15. W. Watching too much TV is bad for your eyes.M. I see. But I enjoy watching TV when I am free.W. Why not play some ball games instead. Exercise is good for your health.M: Thanks a lot. I'll take your advice.Q: What's the girl's suggestion? (A)16. W. Oh! How happy you look today! Is there any good news?M: Yes. My parents have bought me a new computer for my 15th birthday.W: Wonderful! But don't spend too much time playing games, will you?M: OK!Q. Why does the boy look happy today? (D)C. Listen to the passage and tell whether the following statements are true or falseTom's father has a farm. On New Year's Day, when Tom was 15, his father asked him to work on the farm for one year in his free time. Tom was not happy with his father's idea. "That isn't my job. I have too much schoolwork to do." When his father heard this. he said, "I promise to give you anything you want if you can finish one year's work." Tom thought for a moment and agreed.On the first Saturday, the boy got up early and worked hard until evening, just like any other farmer. Time passed quickly. Tom's crops grew well. On the last day of the year, the father called his son to him, "I'm happy to see that you have worked very hard this year," said the father. "Now, tell me what you want.”The boy smiled and showed his father a big piece of bread. He made it from the wheat he worked so hard to grow. "I've already got the best thing. No pain, no gain. I think this is what you wanted me to know." His father was very happy to hear that.(17. F 18. T 19. F 20. T 21. F 22. F 23. T)D. Listen to the passage and complete the following sentences 4These days, most people in Britain and the US do not dress formally. But sometimes it is important to wear the right things.Many British people don't think about clothes very much. They just like to be comfortable. When they go out to enjoy themselves, they can wear almost anything. At theatres, cinemas, and concerts you can put on what you like from beautiful suits and dresses to jeans and sweaters. Anything goes, as long as you look clean and tidy.But in Britain, as Well as in the US, men in offices usually wear suits and ties, and women wear dresses or skirts(not trousers). Doctors, lawyers, and business people wear formal clothes. And in some hotels and restaurants men have to wear ties and women wear tidy dresses.In many ways, Americans are less formal than British people, but they are careful with their clothes. At home, or on holidays, most Americans wear informal or sports clothes. But when they go out in the evening, they like to look nice. In hotels and restaurants, men have to wear jackets and ties, and women wear pretty clothes.It is difficult to say exactly what people wear in Britain and the US, because everyone is different. If you are not sure what to wear, watch what other people do and then dress the same. You will feel more comfortable if you don't look too different from everyone else.(24. right 25. comfortable 26. themselves 27. concerts 28. Doctors 29. less 30. Watch) Part.2II. Choose the best answer31. C 32. D 33. A 34. D 35. C 36. A 37. B 38. B 39. D 40. D 41. D42. C 43. D 44. C 45. B 46. C 47. A 48. B 49. D 50. BIII. Complete the following passage with the words or phrases in the box. Each word can only be used once51. E 52. F 53. G 54. A 55. H 56. D 57. I 58. CIV. Complete the sentences with the given words in their suitable forms59. twenty-nine 60. mine 61. lives 62. thankful63. kindness 64. winners 65. organize 66. widelyV. Rewrite the following sentences as required67. doesn't have 68. do they 69. How often 70. be held/take place71. his sixties 72. are planted 73. if/whether wasPart 3VI. Reading comprehensionA. Choose the best answer74. A 75. B 76. C 77. D 78. A 79. DB. Choose the words or expressions and complete80. C 81. B 82. C 83. B 84. A 85. CC. Read the passage and fill in the blanks with proper words(:186. borrows 87. faster 88. heart 89. others 90. parents 91. bad 92. controlD. Answer the questions93. Four. They are smelling, breathing, tasting and smell memory94. Yes, it does.95. Hair and mucus.96. The food doesn't taste as good.97. Your brain uses a process to create a picture in your mind from the odors you smell.98. I think it is busy and important. Because it does many important jobs.I think it is necessary because we can't breathe or smell without a nose.Any reasonable answer is acceptable.三、浦东新区I. Listening comprehensionA,. Listen and choose the right picture1. The new school buses are so welcomed by local students in Chong Ming Island. (B)2. Even in his sixties, the old man runs twice a week to keep fit. (E)3. January and February are the coldest time of the year in our city. (C)4. Jeremy Shu-How Lin, a rising star in NBA, graduated from Harvard in 2010. (F)5. It's not good for you to do homework while you are listening to the music. (A)6. Julia said that she liked the Dinosaur Jungle most and she would go there again. (G)B. Listen to the dialogue and choose the best answer to the question you hear7. M: Will Mary be able to join us for the party?W: She won' t. She's going to a concert.Q: Where will Mary go instead? (A)8. M: Have you seen the film "2012"?W: Yes, it's so wonderful. You will be amazed at the special effects.Q. What does the woman think of the film "2012"? (B)9. M. What did Ben tell you just now, Julia'?W. He said to me that he would take Becky to Hollywood during the holiday.Q. Who will go to Hollywood with Ben? (A)10. M: Excuse me, I'm Philip from Youth Post. Would you please tell me how often you watch English programmes?W. English programmes? You know, I will attend the Senior high school entrance examination in June. I haven't been allowed to watch TV for years.Q: How often does the girl watch English programmes? (B)11. M: Janet, what is your favourite television programme?W: It' s Best Friends.M. Wow, I love that programme too. My favourite character is Jeff.Q: What' s Janet' s favourtite programme? (C)12. M: How nice! Did you go out for a trip during the Spring Festival?W: Yes, I went to Beijing with my parents. This is one of the photos we took there.M: Travelling's always interesting, isn't it?Q: What are they talking about? (D)13. W: You look tired and sleepy. What's the matter with you, David?M: I've been reading "The Adventures of Tom Sawyer" the whole night. It was really interesting.W. Well, I think you'd better go to bed early tonight.Q: Why did David look tired and sleepy? (D)14. M: Alice, may I have a look at your new iphone?W: Sure. It's a Christmas present from my cousin Peter.M. Sounds great. I will buy one if I win my scholarship in the reading contest.W. Come on, I'm sure you will win.Q: Who bought the iphone for Alice as a present? (B)15. M: I' m terribly sorry I'm very late, Mrs. Smith.W: What has happened, Tom?M: My bus had an accident on the way and it crashed into a book store.W. My goodness! Did you hurt yourself?Q: What happened to Tom? (C)16. M, Good morning, I want some information about flights to London next Tuesday.W: Well, there are three flights in the morning and two in the afternoon. Here's a timetable.M. I'd like a ticket for 7:15 P. M. , please.W: Sorry, all the tickets for this flight are sold out. What about 7:15 A. M. ?M. Mm, that will be all right.Q: When will the man leave for London? (C)C. Listen to the passage and tell whether the following statements are true or falseThe story of Harry Potter happened in an ancient castle, so many teenagers dream about living in an ancient castle. These dreams may include beautiful silk dresses, delicious food, servants and of course, magic. However, real life in an English castle was not easy. With thick stonewalls and high towers, castles were noisy places with an unpleasant smell. Horses, cows, chickens and sheep walked free. Soldiers practiced sword fights every day. And children of all ages played around them. Castles did not have central heating; the only heat came from the fireplace. Even in summer the castle was cool. People living in the castle had to use blankets to keep warm while at work.Life during the Middle Ages began at sunrise. Servants lit the fire, swept the floor and cooked the morning meal. After dinner, everyone continued his or her work. the owners of the castle sometimes took his guests hunting or shooting. His wife spent much of the day watching the servants work, as well as cooks working in the kitchen. Supper was simple and eaten late, just before bedtime.You may find some old magic books in a castle as Harry Potter once did. Read them before you go to bed, because when you fall asleep , the magic of castle life may appear before youreyes.(17. T 18. F 19. F 20. T 21. F 22. F 23. T)D. Listen to the dialogue and complete the following sentencesM: Welcome to Shanghai, Kelly. We' re always glad to see you here.W: Thanks. I always enjoy my visit here very much.M: Last time you came, you were only here for 20 hours. Are you staying longer this time'?W: Yes, I'm staying a little longer than last time. Fourteen days, in fact, I leave on 19th for Sydney. M: And you're here to buy some clothes, aren't you?W: Yes. Shanghai is called a Shopping Paradise in the world, so after my concert, I'm planning to do a lot of shopping. And I have a Chinese designer here, so I have to visit here often.M: What changes have you noticed in Shanghai?W: Well, the biggest difference is the building! It's as if a magician had waved his wand. The same street is now lined with highrises, apartments and shopping malls.M: Yes, Shanghai has changed a lot! Were you pleased with the sales of your last CD?W: No, not really. Even if I thought the CD was a really good one, it sold worse than I had expected. I' m hoping the next one will sell better.M: Kelly, a lot of teenagers see you as a kind of role model. What do you think of it?W: It's quite a responsibility. These days I feel I should be more careful about what I say and do. I don't want to be a bad example.(24. visit 25. 14/fourteen 26. plans 27. biggest 28. sold 29. model 30. careful)Part 2II. 31. A 32. C 33. B 34. C 35. B 36. C 37. C 38. A 39. D 40. D 41. B 42. C 43.C 44. A 45. B 46. C 47. A 48.D 49. D 50. CIII. 51. D 52. H 53. A 54. I 55. F 56. E 57. B 58. CIV. 59. my 60. twentieth 61. director 62. importance 63. decide 64. gently 65. attractive 66. joyV. 67. don't have 68. did she 69. too.., to 70. was chosen 71. How often 72. to have 73. take placePart 3VI. A)74. D 75. C 76. B 77. D 78. C 79. AB) 80. B 81. A 82. D 83. C 84. B 85. CC) 86. appeared 87. regular 88. exactly 89. length 90. various 91. through/toward( s) /to 92. ownedD) 93. Yes, they will.94. At the age of 7, 11, 14 and 16.95. Boys should be taught English in single-sex classes.96. A mix of the genders.97. Because they realized that the girls are better than them. / Because the teaching style may be more appropriate to girls.98. Any reasonable answer is acceptable.四、静安I. Listening comprehensionA. Listen and choose the right picture1. The film "My father and I" is Miss Lin's favourite.2. Exercise more, and you can become stronger and stronger.3. Father promised to buy me a new camera as my 15th birthday present.4. Tina is helping her desk-mate deal with problems in class.5. A cup of tea in the afternoon makes me feel very relaxed.6. Mr. and Mrs. Green have two children. They live a happy life.B. Listen to the dialogue and choose the best answer to the question you hear7. W. Are you going to be a designer like your father after graduation?M: I'm not sure. I want to be a teacher. What about you?W. I don't have any plans yet. Maybe I will be a doctor or a journalist. But things change all too quickly.Q: What job does the boy's father do?8. W: Which bus can take us to the Bund?M: I'm afraid it's too crowded. And the underground isn't nearby. Why not go by taxi?W. All right.Q. How will they probably go to the Bund?9. W. Where are you going?M: I'm going to my grandma's. I usually visit her every two weeks.W: How long are you going to stay there this time?M. For two days.Q: How long will the man stay with his grandma this time?10. W. Can I help you?M: How much is this cup?W. Four yuan each. But if you buy two, it'll be seven yuan.W- OK, I'll take two cups.Q. How much is one cup if you buy two?11. W: Peter, How many languages can you speak?M: Four. English, French, German and Japanese.W: I can't believe it! Is English your native language?M. No, German. English is my second language.Q: What's Peter's nationality?12. W: This road is nice. There are so many trees on each side.M. And it's quiet, too. But do you know it used to be a dirty river with rubbish on the banks?W. Really?M. My grandfather told me all about it. He has lived here for fifty years.Q: What are they talking about?13. W: I'm very tired. Mr. Green kept me writing his business letters all day.M: Then let's go out and get something to eat.W: No, thanks. I only want to go to bed early for a change.Q: What did Mr. Green keep the girl doing that day?14. W. Let's hurry, or we'll be late for the lecture on "Keeping Healthy",M: What time is it now?W: 4 o' clock. There is only half an hour left.M: I see. Let's take a taxi there, and we'll get there on time.Q: When will the lecture begin?15. W: Could you change the channel, dear? This cartoon is really boring.M: What about Basketball World?W: You know I don't like sports or music programmes.M: Then what about TV. series?W: OK, I love TV series.Q: Which programme will they probably watch together?16. W: When are you going to the cinema?M: This coming Friday afternoon.W: I'm afraid you can't. You have the art lesson after school and then you have to look after your little brother until 9:00 p.m. You can go to enjoy it on Saturday afternoon.Q. Why can't the boy go to see the movie on Friday afternoon?C. Listen to the passage and tell whether the following statements are true or falseAn old man walked slowly with a stick into the restaurant. His old jacket and worn-out shoes made him stand out from the usual crowd.A young waitress watched him moving toward a table by the window. She ran over to him and said:"Here, sir.., let me help you with that chair". Without saying a word, he smiled and nodded a"thank you". She pulled the chair away from the table and helped him sit. Then she put his stick beside the table."Thank you, miss," he said, kindly."You' re welcome, sir," she said.After he had finished his breakfast, the waitress brought him the change from his bill. He left it on the table. She helped him up and walked with him to the front door.When she went to clean his table, she found a business card under his plate and a note on a napkin. Under the napkin was 100 dollars for her service.The note on the napkin read: "Dear miss, you did a good job in the restaurant. You have found the secret of happiness. Your kindness will shine through to all those who meet you.The man she had served on was the owner of the restaurant where she worked. This was the first time that she or any of the other workers had ever seen him.D. Listen to the passage and fill in the blanks:Last Summer I went to Sam's school in Britain. It was really different from my school in China. Girls wore grey skirts and white shirts, boys wore grey trousers, and everyone wore the school tie. Some of Sam's lessons Were a bit strange for me. We were reading Shakespeare in the English lesson, and there were various old-fashioned words like "thou" and "thee" to mean "you". In history lessons, we studied 20th Century China. It was strange hearing English people trying to say all our Chinese names! Classes were also a lot more relaxing and active than in China. Male teachers were called "sir" and female teachers "miss" out of respect, but everyone shouted out and waved their hands in lessons. It was more like a debate than a class. A bell rang at the end of each lesson and everyone jumped up to go to the next class. At break we bought "potato crisps" and "cakes" in the dining room. Lunch was later than in China-at one o' clock. We had big plates of pies wi.th peas and carrots. For dessert there was hot sweet rice, called rice pudding, with jam in it. It was good that I'd had a huge lunch because at Sam's school, Monday afternoons are taken up with sports.Part 1I. A. 1. D 2. E 3. B 4. G 5. A 6. CB. 7. A 8. C 9. B 10. A 11. D 12. B 13. D 14. C 15. D 16. AC. 17. T 18. F 19. F 20. F 21. T 22. F 23. TD. 24. white 25. various 26. 20th/twentieth 27. active28. waved 29. cakes 30. hugePart 2II. 31. A 32. B 33. C 34. D 35. C 36. A 37. B 38. C 39. A 40. B41. D 42. D 43. B 44. D 45. C 46. B 47. D 48. A 49. A 50. Cm. 51. E 52. B 53. A 54. I 55. F 56. C 57. H 58. DIV. 59. painting(s) 60. hers 61. careless 62. heightt33. truth 64. examine 65. seriously 6t5. historicalV. 67. didn't, anything 68. Which girl 69. hasn't she 70. were given ,71. so that 72. It, for 73. when, wouldPart 3VI. A. 74. C 75. D 76. B 77. C 78. A 79. BB. 80. B 81. B 82. A 83. C 84. C 85. DC. 86. ancient 87. afford 88. done 89. possible 90. one 91. rarely 92. answersD. 93. The relaxing lifestyles of people (who live in the country)./ Simple stories about people's kindness.94. Stressful. / Full of stress. / Full of pressure./ Teenagers suffer a lot from stress./ Teenagers felt unhappy and unhealthy.95. Because they don't want to complete homework/ Because they refused to learn for exams./Because they want to relax themselves.96. When they keep away from stressful situations completely.97. No, it isn't.98. The stories on TV are not the same as those in real life. /The stories on TV are different from those in real life. / ..-五、青浦I. Listening ComprehensionA. Listen and choose the right picture1. Linda usually goes to the supermarket at weekends. (B)2. Look! Peter is listening to the music. How happy he is! (G)3. My cousin likes painting, and she has a painting lesson twice a week. (C)4. Mr. Stone and his wife often have a walk in the park after dinner. (D)5. In many places in China, the children go to school by school bus. (A)6. The man who is fishing in the boat is our new headmaster. (E)B. Listen to the dialogue and choose the best answer to the question you hear7. W: What kind of sports do you like best, Jack?M: I used to be interested in football. But now I prefer tennis.Q: What kind of sports did Jack use to like best? (B)。
2012年邢台市初中毕业生升学文化课模拟考试理 科 综 合 试 卷(2)本试卷分卷I 和卷II 两部分;卷I 为选择题,卷II 为非选择题。
本试卷满分为120分,考试时间为120分钟。
卷Ⅰ(选择题,共44分)注意事项:1.答卷Ⅰ前,考生务必将自己的姓名、准考证号、科目填涂在答题卡上。
考试结束,监考人员将试卷和答题卡一并收回。
2.每小题选出答案后,用2B 铅笔把答题卡上对应题目的答案标号涂黑。
答在试卷上无效。
以下数据可供解题时参考:相对原子质量:H —1 C -12 O -16 S -32 Cu -64 Zn -65一、选择题(本大题共22个小题;每小题2分,共44分。
在每小题给出的四个选项中,只有一个选项符合题意)1.小明同学出现了腹泻的症状,医生建议他暂时不要吃富含蛋白质和油脂的食物。
小明同学应该选择的早餐是A .油条和豆浆B .馒头和米粥C .鸡蛋和牛奶D .炸鸡腿和酸奶2.有关氧气说法正确的是A .用带火星的木条可以检验氧气B .硫能在氧气中燃烧,说明氧气具有可燃性C .鱼、虾能在水中生存是由于氧气易溶于水D .金属锈蚀、动物呼吸、锅炉爆炸都是缓慢氧化3.规范实验操作是获得实验成功的重要保证。
图1所示化学实验操作不.正确..的是 A .读出液体的体积 B .给液体加热 C .称取固体NaOH D .检查气密性4. 某化学兴趣小组的同学设计了验证Fe 、Cu 、Ag 三种金属活动性顺序的四种实验方案,每种实验方案所需试剂如下,其中无法达到实验目的的是A .FeSO 4溶液、Cu 、AgB .FeCl 2溶液、Cu 、Ag(NO)3溶液图1图2 C . Fe 、CuSO 4溶液、Ag D .Fe 、Cu 、稀盐酸、Ag(NO)3溶液5. 复方冬青油软膏具有强力迅速镇痛作用。
其有效成分的分子模型如图2。
下列说法中不.正确..的是 A .该有机物由3种元素组成B .该有机物化学式为C 8H 8O 3C .该有机物分子中碳、氢元素的质量比为1:1D .该有机物分子中氢、氧原子的个数比为8:36.下列实验现象和对应结论的描述都正确的是A .在某固体中滴加盐酸,有气泡产生——该固体一定含碳酸盐B .在某无色溶液中滴入紫色石蕊溶液,溶液变成蓝色——该溶液一定是碱溶液C .用燃着的木条伸入一集气瓶中,火焰熄灭——集气瓶中所盛气体一定是CO 2D .将一种白色晶体与NaOH 溶液混合加热,有能使湿润的红石蕊试纸变蓝的气体产生——该盐一定是铵盐7.图3中四个图像能正确反映其对应实验操作的是① ② ③ ④A. ①高温煅烧一定质量的石灰石B. ②用等质量、等浓度的双氧水分别制取氧气C. ③向一定体积的稀盐酸中逐滴加入氢氧化钠溶液D. ④某温度下,向一定量饱和硝酸钾溶液中加入硝酸钾晶体8.下列物质的用途与其物理性质有关的是A .用生石灰作某些食品的干燥剂B .用铅锑合金作保险丝C .用碳素墨水写文字档案便于保存D .白炽灯泡里涂上红磷作脱氧剂9.下列关于分子的叙述正确的A .分子在化学变化中不能再分B .碘晶体受热升华是因为碘分子发生了变化C .物质受热膨胀是由于分子受热体积变大的缘故D .坐在教室里闻到窗外飘过的花香说明分子在不停运动10.下列各组物质中,通常情况下全部属于导体的一组是A .水银、氢氧化钙溶液、油B .塑料棒、铅笔芯、铁丝C .金属、食盐水、稀盐酸D .陶瓷、干木棒、水11.下面有关新材料和新科技的说法正确的是A.核燃料的放射性污染会造成严重的生态灾难,所以各国应严禁核工业发展图3B.常见的半导体材料有硅、锗、砷化镓等C.纳米材料是一种新材料制成的大米D.超导体是一种电阻为零的材料,可以用来制造灯丝,灯泡会特别亮12.逻辑推理是理化学习常用的思维方法,下列推理正确的是A.水沸腾时吸热,温度升高,因此沸腾时水的内能增大B.含碳元素的物质充分燃烧会生成CO2,燃烧能生成CO2的物质一定含碳元素C.由于水比冰的比热容大,所以冷却食品时0℃的水比0℃的冰效果好D.中和反应有盐和水生成,因此有盐和水生成的反应一定是中和反应13.每年世界上都有成千上万的家庭发生火灾,如果知道一些家庭防火知识和紧急灭火措施,就能避免火灾,下列说法你认为不正确...的是A.及时更换老化破损电线,修理失灵电器B.电器着火应用水扑灭C.油锅中的油着火,可用锅盖盖灭D.室内起火时不要急于打开门窗14.从图4所示实验中得出的结论不正确...的是图4A.甲实验说明大气压存在B.乙实验说明流体中流速越大的位置压强越小C.丙实验说明二氧化碳与水反应生成了碳酸D.丁实验说明二氧化碳不燃烧,也不支持燃烧,密度比空气大15.关于声现象,下列说法正确的是A.声和光都是电磁波,可以在真空中传播B.某些路段禁鸣喇叭,是在声源处控制噪声C.电磁波只能传递信息,不能传递能量D.人们能辨别不同乐器发出的声音,是因为它们的音调不同16.下列说法中错误的...是A.用久了的电灯灯丝变细是升华现象B.秋天的早晨,大雾逐渐散去是液化现象C.被水蒸气烫伤比沸水烫伤更严重是因为水蒸气液化时放出热量D.人出汗后,微风吹过感到凉爽,是因为汗液蒸发加快,带走更多的热量17.下列数据最接近实际的是A.人正常步行的速度约为3m/s B.人感觉舒适的温度约为37℃C .百元人民币的长度约为15cmD .空调机正常制冷时的电流约为0.8A18.图5是小华用相机拍的一张大理崇圣寺“三塔”相片。
关于这张照片,下面说法中正确的是A .“三塔”在湖中的倒影是实像B .要使塔的像更大些,小华或相机镜头应向塔靠近些C .要使塔的像更大些,小华或相机镜头应离塔更远些D .要使塔的像更小些,小华或相机镜头应离塔更近些 19.如图6所示,飞船绕地球飞行。
下列有关飞船升空至返回过程中的说法正确的是 A .飞船随火箭加速升空过程中,势能增加,机械能增加B .飞船运行到近地点时,动能最大,机械能最大C .飞船从近地点向远地点飞行时,动能减小,机械能减小D .飞船返回过程中,与大气剧烈摩擦,机械能减小,内能减小20.关于磁现象,下列说法中正确的一组是 ① 通电裸线管能够产生磁场;② 电动机能够把电能转化为机械能;③ 改变电磁铁线圈的匝数,电磁铁的磁性强弱就会改变;④导体在磁场中做切割磁感线运动时,导体中就会产生感应电流。
A .① ②B .③ ④C .① ③D .② ④21.如图7所示,两个圆柱形容器甲和乙,底面积不同(S甲<S 乙),当两容器盛液体的高度相同时,液体对容器底部的压强相等。
现将P 球浸没在甲容器的液体中,Q 球浸没在乙容器的液体中,两容器中均无液体溢出,如果这时液体对各自容器底部的压力相等,则一定是A .P 球的质量小于Q 球的质量B .P 球的质量大于Q 球的质量C .P 球的体积小于Q 球的体积D .P 球的体积大于Q 球的体积22.如图8所示,电源电压不变,变阻器规格为“20 Ω 2 A ”。
闭合开关,当变阻器的滑片分别在b 端和ab 中点时,电流表的示数之比为2︰3,电压表的示数之差为4 V 。
则下列结果正确的是A .电源电压为12 VB .R 0的阻值为40 ΩC .滑片在ab 中点时,电流表示数为0.8 AD .滑片在b 点时,电路消耗的电功率为19.2W近地点飞船 远地点图6图5 a R 0 p A V b S 图8 R 图7甲乙2012年邢台市初中毕业生升学文化课模拟考试理 科 综 合 试 卷卷Ⅱ(非选择题,共76分)注意事项:1.答卷Ⅱ前,将密封线左侧的项目填写清楚。
2.答卷Ⅱ时,将答案用蓝色、黑色钢笔或圆珠笔直接写在试卷上。
题 号二 三 四36 37 38 得 分以下数据可供解题时参考:相对原子质量:H —1 C -12 O -16 S -32 Cu -64 Zn -65二、填空及简答题(本大题共9个小题;每空1分,共34分)23.图9是教学中经常使用的投影仪,请按要求回答。
(1)平面镜的作用是:_____________________________。
(2)如果在屏幕上的像比较模糊(与投影片无关),调整方法是:________________________________________________。
(3)在图中作出从A 点发出经平面镜反射后的光线。
24.高压起重气垫是一种适合于地震救灾的起重工具。
它由如图10甲所示的高压气瓶、气管、阀门与气垫连接而成。
起重时,气垫放入重物与地面的间隙之间,由高压气瓶向气垫内充气,气垫在短时间内可把重物举起一定高度。
高压气瓶向气垫内充气时,气瓶内的气体温度 ,内能 。
如果高压起重气垫在5s 内可将105N 的得 分 评卷人 图9 图10图13 气球A B 气球 图14物体举高0.1m ,则其功率为 W 。
25.弹簧测力计挂着一重为3.6N 的物体A ,物体A 浸没并静止在水中,如图11所示。
(1)图中弹簧测力计的示数是 N 。
物体A 所受浮力是 N 。
(2)如果测力计不拉着物体A ,它在水中会 (选填“下沉”、“上浮”、“悬浮”),判断的依据是 。
26.图12是关于电阻A 、B 的I -U 图像。
由图可知,电阻值较大的电阻是_____Ω。
若将A 、B 两电阻并联后接在电压为2.5V 的电源两端,则干路中的电流是_____A ,此时电路总电阻值是_____Ω。
(保留一位小数)27.图13是太阳能LED 照明路灯。
它主要由太阳能电池板、LED 灯头等部分构成。
LED 是一种发光二极管,通过电流能够发光,可以把电能直接转化成___ ___能。
太阳能是______能源(选填“一次”或“二次”)、清洁无污染,它是在太阳内部,氢原子核发生 (选填“裂变”或“聚变”),释放出的核能。
28.小明设计了如图14所示的装置A 、B 进行趣味实验。
(1)使用装置A 进行实验时,将滴管中的物质加入到锥形瓶中,发现气球鼓起来。
你推测锥形瓶中的物质可能为(写出一种物质即可,下同) ,滴管中的物质可能为 ;(2)使用装置B 进行实验时,将滴管中的物质加入到锥形瓶中,发现气球也鼓起来。
请你推测发生反应的化学方程式可能为(写出一个即可) ;(3)请你说出装置A 、B 中气球都能鼓起来的共同原理是 。
29.家庭厨房实际上就是一个化学世界。
“柴、米、油、盐、酱、醋、糖”等都是化学物质。
请根据你所掌握的化学知识,结合厨房中的常用物质,回答下列问题:(1)食盐是厨房中最重要的调味品,如果食盐中不加碘,则碘缺乏地区的人可图11图12能 。
(2)为了全民的健康,我国推广使用强化铁酱油,这里的“铁”指的是 。
(填“单质”、“元素”或“原子”);(3)餐具上的油污用加入洗洁精的水更易洗净,原因是 。
(4)当人们有胃酸过多的病症时,可用小苏打治疗。