个人摘录 2011年上海中考二模卷易错题

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2011年上海市静安区初中数学二模卷试题及参考答案【纯word版,完美打印】

2011年上海市静安区初中数学二模卷试题及参考答案【纯word版,完美打印】

静安区“学业效能实证研究”学习质量调研九年级数学学科 2011.4(满分150分,100分钟完成)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、本调研卷上答题一律无效.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)[每小题只有一个正确选项,在答题纸相应题号的选项上用2B 铅笔正确填涂] 1.下列各数中与213-相等的是(A )3 (B )3- (C )33 (D )33- 2.不等式组⎩⎨⎧>-->1,2x x 的解集是(A )2->x (B )1->x (C )1-<x (D )12-<<-x 3.下列问题中,两个变量成反比例的是(A )长方形的周长确定,它的长与宽; (B )长方形的长确定,它的周长与宽; (C )长方形的面积确定,它的长与宽; (D )长方形的长确定,它的面积与宽. 4.一支篮球队准备购买10双运动鞋,各种尺码统计如下表:尺码(厘米) 25 25.5 26 26.5 27 购买量(双)11242则这10双运动鞋尺码的众数和中位数分别为(A )26厘米,26厘米 (B )26.5厘米,26.5厘米 (C )26.5厘米,26厘米 (D )26厘米,26.5厘米 5.三角形的重心是三角形的(A )三条中线的交点 (B )三条角平分线的交点 (C )三边垂直平分线的交点 (D )三条高所在直线的交点 6.下列图形中,可能是中心对称图形的是二、填空题:(本大题共12题,每题4分,满分48分)[在答题纸相应题号后的空格内直接填写答案] 7.计算:|21|20-+= ▲ . 8.化简:=+-a a a1▲ . 9.如果关于x 的方程0)12(22=+--m x m x 有两个实数根,那么m 的取值范围是 ▲ .10. 将二元二次方程0562=+-x xy x 化为二个一次方程为 ▲ . 11.如果函数kxy =(k 为常数)的图像经过点(–1,–2),那么y 随着x 的增大而 ▲ .12. 如果02)1()1(2=-+-+x x , 那么=+1x ▲ .13.在一个袋中,装有四个除数字外其它完全相同的小球,球面上分别标有1、2、3、4这四个数字,从中随机摸出两个球,球面数字的和为奇数的概率是 ▲ . 14.为了了解某校九年级学生的身体素质情况,在该校九年级随机抽取50位学生进行一分钟跳绳次数测试,以测试数据为样本,绘制出频数分布直方图(如图,每组数据可含最小值,不含最大值),如果在一分钟内跳绳次数少于120次的为不合格,那么可以估计该校九年级300名学生中跳绳不合格的人数为 ▲ . 15.正五边形每个外角的度数是 ▲ .16.在△ABC 中,点D 在边BC 上,BD =2CD ,b AC a AB ==,,那么=AD ▲ . 17.已知⊙1O 与⊙2O 两圆内含,321=O O ,⊙1O 的半径为5,那么⊙2O 的半径r 的取值范围是 ▲ .18.在△ABC 中,∠C=90°,AC=4,BC=2,△ABC 绕着点C 旋转后, 点B 落在AC 边上的点B ’,点A 落在点A ’,那么tan ∠AA ’B ’的值为 ▲ .三、解答题:(本大题共7题,满分78分)(第14题图)80 100 120 140 160 180 跳绳次数4 8 12 16频数 O[将下列各题的解答过程,做在答题纸的相应位置上] 19.(本题满分10分)化简:yx y y x x-++,并求当y x 3=时的值.20.(本题满分10分) 解方程:122432=++-x x .21.(本题满分10分,第(1)小题满分3分,第(2)小题满分7分)已知:如图,在梯形ABCD 中,DC ∥AB ,AD =BC ,BD 平分∠ABC ,∠A =60°. 求:(1)求∠CDB 的度数;(2)当AD =2时,求对角线BD 的长和梯形ABCD 的面积.22.(本题满分10分第(1)小题满分8分,第(2)小题满分2分)A 、B 两城间的公路长为450千米,甲、乙两车同时从A 城出发沿这一公路驶向B 城,甲车到达B 城1小时后沿原路返回.如图是它们离A 城的路程y (千米)与行驶时间 x (小时)之间的函数图像.(1)求甲车返回过程中y 与x 之间的函数解析式,并写出函数的定义域;(2)乙车行驶6小时与返回的甲车相遇,求乙车的行驶速度.23.(本题满分12分,第(1)小题满分6分,第(2)小题满分6分)已知:如图,在□ABCD 中,点E 、F 分别是AB 、CD 的中点,CE 、AF 与对角线BD 分别相交于点G 、H . (1) 求证:DH=HG=BG ;CDFHx (小时)y (千米)45010 4 5OFC ED(第22题图)(第21题图)ABCD(2) 如果AD ⊥BD ,求证:四边形EGFH 是菱形.24.(本题满分12分,第(1)小题满分3分,第(2)小题满分9分)如图, 二次函数22++=bx ax y 的图像与x 轴、y 轴的交点分别为A 、B ,点C 在这个二次函数的图像上,且∠ABC =90º,∠CAB =∠BAO ,21tan =∠BAO .(1)求点A 的坐标;(2)求这个二次函数的解析式.25.(本题满分14分,第(1)小题满分6分,第(2)小题满分5分,第(3)小题满分3分)如图,在半径为5的⊙O 中,点A 、B 在⊙O 上,∠AOB =90º,点C 是AB 上的一个动点,AC 与OB 的延长线相交于点D ,设AC =x ,BD =y .(1) 求y 关于x 的函数解析式,并写出它的定义域;(2) 如果⊙1O 与⊙O 相交于点A 、C ,且⊙1O 与⊙O 的圆心距为2,当BD =31OB 时,求⊙1O 的半径; (3) 是否存在点C ,使得△DCB ∽△DOC ?如果存在,请证明;如果不存在,请简要说明理由.BDCAO(第25题图)ACB Oxy(第23题图) (第24题图)静安区质量调研九年级数学试卷参考答案及评分标准2011.4.14一、选择题:(本大题共6题,每题4分,满分24分) 1.C ; 2.D ; 3.C ; 4.B ; 5.A ; 6.D . 二.填空题:(本大题共12题,满分48分)7.2; 8.12-a a ; 9.41≤m ; 10.056,0=+-=y x x ; 11.增大; 12.2;13.32; 14.72; 15.72; 16.b a 3231+; 17.820><<r r 或;18.31.三、(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=yx y xy yx xy x -++--……………………………………………………………(5分) =yx yx -+……………………………………………………………………………(2分)当y x 3=时,原式=32131333+=-+=-+yy y y .………………………………(3分)20.解:4)2(232-=-+x x ,……………………………………………………………(3分)0322=--x x ,………………………………………………………………………(2分)0)3)(1(=-+x x ,……………………………………………………………………(2分)3,121=-=x x .………………………………………………………………………(2分)经检验:1-=x ,3=x 都是原方程的根.………………………………………(1分) 所以原方程的根是3,121=-=x x .21. 解:(1) ∵在梯形ABCD 中,DC ∥AB ,AD =BC ,∠A =60°,∴∠CBA =∠A =60º. ………………………………………………………………(1分)∵BD 平分∠ABC ,∴∠CDB =∠ABD =21∠CBA=30º,………………………(2分)(2)在△ACD 中,∵∠ADB =180º–∠A –∠ABD=90º.……………………………(1分)∴BD=AD tan ⋅A =2tan60º=23.…………………………………………………(1分)过点D 作DH ⊥AB ,垂足为H ,……………………………………………………(1分)∴AH =AD sin ⋅A =2sin60º=3.……………………………………………………(1分)∵∠CDB =∠CBD =21∠CBD =30º,∴DC =BC =AD =2. …………………………(1分)∵AB =2AD =4, ………………………………………………………………………(1分)∴333)24(21)(21=+=⋅+=DH CD AB S ABCD 梯形.…………………………(1分)22.解:(1)设甲车返回过程中y 与x 之间的函数解析式b kx y +=,……………………(1分)∵图像过(5,450),(10,0)两点,………………………………………………(1分)∴⎩⎨⎧=+=+.010,4505b k b k ……………………………………………………………………(2分)解得⎩⎨⎧=-=.900,90b k ………………………………………………………………………(2分)∴90090+-=x y .……………………………………………………………………(1分)函数的定义域为5≤x ≤10.……………………………………………………………(1分)2)当6=x 时,360900690=+⨯-=y ,………………………………………………(1分)606360==乙v (千米/小时). ………………………………………………………(1分) 23.证明:(1)∵四边形ABCD 是平行四边形,∴AB //CD ,AB =CD .…………………(1分)∵点E 、F 分别是AB 、CD 的中点,∴21===CD DF AB DF HB DH .…………………………………………………………(2分)∴DH =BD 31.………………………………………………………………………(1分)同理:BG =BD 31.…………………………………………………………………(1分)∴DH =HG =GB =BD 31.……………………………………………………………(1分)(2)联结EF ,交BD 于点O .…………………………………………………………(1分)∵AB //CD ,AB =CD ,点E 、F 分别是AB 、CD 的中点,∴12121====AB CDBE DF BO OD EO FO .…………………………………………………(1分)∴FO =EO ,DO =BO .………………………………………………………………(1分)∵DH =GB ,∴OH =OG .∴四边形EGFH 是平行四边形.……………………(1分)∵点E 、O 分别是AB 、BD 的中点,∴OE //AD .∵AD ⊥BD ,∴EF ⊥GH .…………………………………………………………(1分)∴□HEGF 是菱形.………………………………………………………………(1分)24.解:(1)二次函数22++=bx ax y 的图像y 轴的交点为B (0,2),………………(1分)在Rt △AOB 中,∵OB =2,21tan ==∠OA OB BAO ,………………………………(1分)∴OA =4,∴点A 的坐标(4,0).…………………………………………………(1分)(2)过点C 作CD ⊥y 轴,垂足为D ,…………………………………………………(1分)∵∠CDB =∠ABC =∠AOB =90º,∴∠CBD =180º–∠ABC –∠ABO =90º–∠ABO =∠BAO .………………………(1分)∴△CDB ∽△BOA ,…………………………………………………………………(1分)∵∠CAB =∠BAO ,∴21tan tan =∠=∠=BAO CAB AB CB ,………………………(1分)∴21===AB CB OA BD OB CD .……………………………………………………………(1分)∴OC =1,BD =2,∴OD =4.∴C (1,4).…………………………………………(1分)∵点A 、C 在二次函数22++=bx ax y 的图像上,∴⎩⎨⎧++=++=,24,24160b a b a …………………………………………………………………(1分)∴⎪⎪⎩⎪⎪⎨⎧=-=.617,65b a …………………………………………………………………………(1分)∴二次函数解析式为2617652++-=x x y .………………………………………(1分)25.解:(1)过⊙O 的圆心作OE ⊥AC ,垂足为E ,………………………………………(1分)∴AE =x AC 2121=,OE =2224125x AE AO -=-.…………………………(1分)∵∠DEO =∠AOB =90º,∴∠D =90º–∠EOD =∠AOE ,∴△ODE ∽△AOE .………(1分)∴AEAOOE OD =,∵OD =5+y ,∴25412552x x y =-+.………………………………(1分)∴y 关于x 的函数解析式为:xxx y 510052--=.……………………………(1分)定义域为:250<<x .………………………………………………………(1分)(2)当BD =31OB 时,35=y ,x x x 51005352--=.…………………………………(1分)∴6=x .……………………………………………………………………………(2分)∴AE =321=x ,OE =43522=-. 当点1O 在线段OE 上时,211=-=OO OE E O ,1332222211=+=+=AE E O A O .…………………………………………(1分)当点1O 在线段EO 的延长线上时,611=+=OO OE E O ,5336222211=+=+=AE E O A O .…………………………………………(1分)1O 的半径为13或53.(3)存在,当点C 为AB 的中点时,△DCB ∽△DOC .…………………………………(1分)证明如下:∵当点C 为AB 的中点时,∠BOC=∠AOC=21∠AOB=45º, 又∵OA=OC=OB ,∴∠OCA=∠OCB =︒=︒-5.67245180, ∴∠DCB =180º–∠OCA –∠OCB=45º.…………………………………………(1分)∴∠DCB =∠BOC .又∵∠D =∠D ,∴△DCB ∽△DOC .………………………(1分)∴存在点C ,使得△DCB ∽△DOC .。

上海奉贤区2011年中考二模数学试题及答案[1]1

上海奉贤区2011年中考二模数学试题及答案[1]1

第6题图题图第3题图题图 A B F C D E O 奉贤区调研测试九年级数学试卷 2011. 04 (完卷时间100分钟,满分150分)考生注意:1.本试卷含三个大题,共25题.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)1.计算32a a ×的结果是(的结果是( ▲ )A .5a ; B .6a ;C .8a ;D .9a .2.下列运算不正确的是(.下列运算不正确的是( ▲ )A .22(2)2-=; B .236´=; C .623¸=; D .235+=. 3.如图,直线CD 是线段AB 的垂直平分线,P 为直线CD 上的一点,已知线段P A =5, 那么线段PB 的长度为(的长度为( ▲ ) A .3 ; B .4 ; C .5 ; D .6.4.小悦买书需用48元钱,付款时恰好用了1元和5元的纸币共12张.设所用的1元纸币为x 张,根据题意,下面所列方程正确的是(张,根据题意,下面所列方程正确的是( ▲ ) A .48)12(5=-+x x ; B .48)12(5=-+x x ; C .48)5(12=-+x x ; D .48)12(5=-+x x . 5.某种彩票的中奖机会是1%,下列说法正确的是(,下列说法正确的是( ▲ ) A .买1张这种彩票一定不会中奖;张这种彩票一定不会中奖; B .买100张这种彩票一定会中奖;张这种彩票一定会中奖;C .买1张这种彩票可能会中奖;D .买100张这种彩票一定有99张彩票不会中奖. 6.如图,正方形ABCD 中,E 为AB 中的中点点,AF ⊥DE 于点O 那,那么么DOAO(等于( ▲ ) A .352 ; B .31; C .32; D .21.二、填空题:(本大题共12题,每题4分,满分48分)第12题图题图第18题图题图yx-O 第11题图题图7.截止到2010年10月31日,上海世博园共接待游客73 080 000人,人, 用科学记数法表示是用科学记数法表示是 ▲▲ 人.人.人. 8.函数13y x =-中,自变量x 的取值范围是的取值范围是▲▲ .. 9. 9. 方程方程212x -=的根是的根是 ▲▲ ..10.在直角坐标系中,点)2-2(,A 与点)12(,-B 之间的距离=AB ▲▲ ..11.已知反比例函数xm y 2-=的图象如图所示,的图象如图所示,那么那么m 的取值范围是的取值范围是 ▲▲ ..12.如图,l 1表示某摩托厂一天的销售收入与摩托车销售量之间的关系;l 2表示表示 该摩托厂一天的销售成本与销售量之间的关系。

上海南汇区20校2011年中考最新模拟测试卷2

上海南汇区20校2011年中考最新模拟测试卷2

(满分150分,完卷时间100分钟)一、选择题:(本大题共6题,每题4分,满分24分)1. 下列运算所得结果为负数的是……………………………………………………( )(A )()03-;(B )()3--;(C )23-;(D )()23-.2.用换元法解方程1121=---x x xx 时,如设xx y 1-=,则将原方程化为关于y 的整式方程是 ……………………………………………………………………………………( ) (A )022=--y y ; (B )022=-+y y ; (C )0122=--y y ;(D )0122=-+y y .3.在ABC Rt ∆中,︒=∠90C ,4,5==AC AB ,则B cos 的值为…………………( )(A )34; (B )53; (C )43; (D )54.4.在一个不透明的袋中装有2个红球和3个白球,它们除了颜色外都相同,从中随机摸出1个球,则摸出红球的概率是………………………………………………………( ) (A )12; (B )23; (C )15; (D )25.5.下列关于长方体的说法中正确的是…………………………………………………( ) (A )长方体中互相平行的棱的长不一定相等;(B )长方体中12条棱的位置关系只有平行和相交; (C )长方体中6个面的面积都相等; (D )长方体中相对的两个面一定平行. 6.如图,直线443y x =-+与x 轴、y 轴分别交于A 、B 两点,把△AO B 绕点A 顺时针旋转90°后得到△A O B '',则点B '的坐标是…………( (A )(3,4); (B )(7,3);(C )(7,4);(D )(4,5).二、填空题:(本大题共12题,每题4分,满分48分)第13题ABCα7.计算:9=________. 8.函数51-=x y 的定义域是___________ .9、不等式组⎩⎨⎧<-≤-6201x x 解集是_____________________.10.方程132=-x 的解是___________ .11.将抛物线2y x =向下平移一个单位后,得到新的抛物线,那么新的抛物线的表达式是__________ .12.已知反比例函数的图像经过点(-2,3),则反比例函数的解析式是 .13.如图,为测楼房BC 的高,在距楼房30米的A 处,测得楼顶B 的仰角为α,则楼房BC 的高为___________米.14.化简:3(24)5()a b a b --+=_____________.15.在△ABC 中,边BC 上的中线AD 等于9cm ,那么这个三角形的重心G 到顶点A 的距离是cm .16.已知两个相似三角形对应高的比是1:2,那么它们的面积比是____________. 17.如果正多边形的中心角是36°,那么这个正多边形的边数是 .18.△ABC 是直径为10 cm 的⊙O 的内接等腰三角形,如果此等腰三角形的底边BC =8 cm ,那么△ABC 的面积为 cm 2. 三、解答题:(本大题共7题,满分78分) 19.(本题满分10分)先化简,再求值:4)122(22--÷+-a a a a ,其中1-=a .20.(本题满分10分)解方程组:⎩⎨⎧=-=--34322y x y xy x21.(本题满分10分)如图,在△ABC 中,已知∠C =90°,52sin =A ,D 为边AC 上一点,∠BDC =45°,DC =6.求AB 的长.22.(本题满分10分,第(1)题3分,第(2)题3分,第(3)题4分)某校计划在午间播放歌曲,为了了解学生的喜好,从学校各年级随机抽取了250名学生进行问卷调查,整理调查结果绘制成统计图表如下:(1)在被调查的学生中喜欢动漫歌曲的学生有 人.(2)在被调查的学生中喜欢动漫歌曲的学生占 %.(3)本校学生有900人,估计喜欢动漫歌曲的学生有 人.AD(第24题图)23.(本题满分12分,第(1)题6分,第(2)题6分)已知:如图,在□ABCD 中,E 、F 分别为边AB 、CD 的中点,BD 是对角线,AG ∥DB 交CB 的延长线于G . .(1)求证:△ADE ≌△CBF ;(2)若四边形BEDF 是菱形,求证:四边形AGBD 是矩形.24.(本题满分12分,第(1)小题5分,第(2)小题7分)已知二次函数c bx x y ++=2的图像经过点)0,1(-A ,)0,2(B ,与y 轴交于点C . (1)求这个二次函数的解析式,并指出二次函数图像的对称轴;(2)如在这条抛物线上有一点P ,且点P 的横坐标为2-,在x 轴上有一点Q ,使ABC BPQ ∆∆与相似,求点Q 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)(第23题图)如图,梯形ABCD 中,AD //BC ,CD ⊥BC ,已知AB =5,BC =6,cos B =35.点O 为BC 边上的动点,以O 为圆心,BO 为半径的⊙O 交边AB 于点P .(1)设x OB =,y BP =,求y 与x 的函数关系式,并写出函数定义域; (2)当⊙O 与以点D 为圆心,DC 为半径⊙D 外切时,求⊙O 的半径; (3)联结OD 、AC ,交于点E ,当△CEO 为等腰三角形时,求⊙O 的半径.松江区2009学年度第二学期初三月考A BC DOPABCDOPE数学参考答案2010.3一、选择题1、C ;2、A ;3、B ;4、D ;5、D ;6、B 。

上海市金山区2011中考数学二模试题及答案

上海市金山区2011中考数学二模试题及答案

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25. (本题满分 14 分)如图,正方形 ABCD 的边长是 4 , M 是 AD 的中点.动点 E 在线 段 AB 上运动. 连接 EM 并延长交射线 CD 于点 F , 过 M 作 EF 的垂线交射线 BC 于 点 G ,连接 EG 、 FG . (1)求证: GEF 是等腰三角形; (2)设 AE x 时, EGF 的面积为 y .求 y 关于 x 的函数关系式,并写出自变量 x 的取值范围; (3)在点 E 运动过程中 GEF 是否可以成为等边三角形?请说明理由. F A E M D

上海市虹口区2011中考数学二模试题及答案

上海市虹口区2011中考数学二模试题及答案

第5题图虹口区2011年初三年级数学学科中考练习题(满分150分,考试时间100分钟) 2011.4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.]1.一个数的相反数是2-,则这个数是 A .12-B .12C .2D .2- 2.一元二次方程210x x --=的根的情况是A .有两个相等的实数根B .有两个不相等的实数根C .有一个实数根为1D .没有实数根3.袋中有3个红球,4个白球,这些球的形状、大小、质地等完全相同.在看不到球的条件下,随机从袋中摸出1个球,则摸出白球的概率是A .14 B .17 C .4 D .474.若点00()x y ,在函数ky x=(0x <)的图像上,且001x y =-,则它的图像大致是5.图中的尺规作图是作A .线段的垂直平分线 B.一条线段等于已知线段 C .一个角等于已知角D .角的平分线 6.下列命题中,假命题是A .两腰相等的梯形是等腰梯形B .对角线相等的梯形是等腰梯形C .两个底角相等的梯形是等腰梯形D .平行于等腰三角形底边的直线截两腰所得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.= ▲ . 8.分解因式:2xy x -= ▲ . 9.不等式2(1)4x ->的解集是 ▲ .10.用换元法解方程221201x x x x -++=-时,可设21x y x-=,则原方程可化为关于y 的整式方程为 ▲ .11.x =的解是 ▲ .12.将抛物线221y x =-向上平移4个单位后,以所得抛物线为图像的二次函数解析式是▲ .13.一次函数y kx b =+的图像与y 轴交点的纵坐标为3-,且当1x =时,1y =-,则该一次函数的解析式是 ▲ .14.甲、乙两支排球队的人数相等,且平均身高都是1.86米,方差分别为20.35S 甲=,20.27S 乙=,则身高较整齐的球队是 ▲ 队.15.计算:12)()2a b a b +--(= ▲ .16.如图,直线//a b ,点B 在直线b 上,且AB BC ⊥,140∠=︒,则2∠= ▲ 度.17.如图,用线段AB 表示的高楼与地面垂直,在高楼前D 点测得楼顶A 的仰角为30︒,向高楼前进60米到C 点,又测得楼顶A 的仰角为45︒,且D 、C 、B 三点在同一直线上,则该高楼的高度为 ▲ 米(结果保留根号).18.如图,点G 是ABC △的重心,CG 的延长线交AB 于D ,5GA =,4GC =,3GB =,将ADG △绕点D 顺时针方向旋转180 得到BDE △,则EBC △的面积=▲ .三、解答题(本大题共7题,满分78分) 19.(本题满分10分)化简:2211()1211a a a a a a ++÷--+-.第16题第17题图第18题图AG CD图2(每组仅含最小值,不含最大值) 3′图120.(本题满分10分) 解方程组:221,320.x y x xy y +=⎧⎨-+=⎩21.(本题满分10分)如图,⊙O 是△ABC 的外接圆,圆心O 在这个三角形的高AD 上,AB =10,BC =12. 求⊙O 的半径.22.(本题满分10分,第(1)小题2分,第(2)小题4分,第(3)小题4分)为了解某校初三男生1000米长跑、女生800米长跑的成绩情况,从该校初三学生中随机抽取了10名男生和10名女生进行测试,将所得的成绩分别制作成如下的表1和图1,并根据男生成绩绘制了不完整的频率分布直方图(图2).(1)根据表1,补全图2;(2)根据图1,10名女生成绩的中位数是⎽⎽⎽⎽⎽⎽⎽⎽⎽⎽⎽,众数是⎽⎽⎽⎽⎽⎽⎽⎽;(3)按规定,初三女生800米长跑成绩不超过3′19〞就可以得满分.该校初三学生共490人,其中男生比女生少70人.如果该校初三女生全部参加800米长跑测试,请你估计可获得满分的人数约为多少?第21题图① ②23.(本题满分12分,第(1)小题6分,第(2)小题6分)如图,EF 是平行四边形ABCD 的对角线BD 的垂直平分线,EF 与边AD 、BC 分别交于点E 、F .(1)求证:四边形BFDE 是菱形;(2)若E 为线段AD 的中点,求证:AB ⊥BD .24.(本题满分12分,第(1)小题6分,第(2)小题6分)在平面直角坐标系中,抛物线2y x bx c =++经过点(0,2)和点(3,5). (1)求该抛物线的表达式并写出顶点坐标; (2)点P 为抛物线上一动点,如果直径为4的 ⊙P 与y 轴相切,求点P 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)如图,在Rt △ABC 中,∠BAC = 90°,AB =3,AC =4,AD 是BC 边上的高,点E 、F 分别是AB 边和AC 边上的动点,且∠EDF = 90°.(1)求DE ︰DF 的值;(2)联结EF ,设点B 与点E 间的距离为x ,△DEF 的面积为y ,求y 关于x 的函数解析式,并写出x 的取值范围;(3)设直线DF 与直线AB 相交于点G ,△EFG 能否成为等腰三角形?若能,请直接写出线段BE 的长;若不能,请说明理由.bx c ++第24题图A D EB FC第23题图 O 第25题CEFA备用图1BCD 备用图2BCD AA2011年虹口区中考数学模拟练习卷答案要点与评分标准说明: 2011.4 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.C ; 2.B ; 3.D ; 4.B ; 5.A ; 6.C .二、填空题:(本大题共12题,满分48分)7; 8.()x y x -; 9.3x >; 10.2210y y ++=; 11.2x =; 12.223y x =+; 13.23y x =-; 14.乙;15.2a b +; 16.50; 17.30); 18.12.三、解答题:(本大题共7题,满分78分) 19.解:原式=22111[]1(1)a a a a a+-+⋅-- 222111(1)a a a a -+-=⋅-11a =- 20.解法1:由②得(2)()0x y x y --= ∴20x y -=或0x y -= ∴原方程组可化为1,20;x y x y +=⎧⎨-=⎩1,0.x y x y +=⎧⎨-=⎩ ∴分别解这两个方程组,得原方程组的解是112,31;3x y ⎧=⎪⎪⎨⎪=⎪⎩ 221,21.2x y ⎧=⎪⎪⎨⎪=⎪⎩解法2:由①得1y x =- ③把③代入②得223(1)2(1)0x x x x --+-= 整理得26720x x -+=解得1221,32x x == 分别代入③得1211,32y y ==∴原方程组的解为112,31;3x y ⎧=⎪⎪⎨⎪=⎪⎩ 221,21.2x y ⎧=⎪⎪⎨⎪=⎪⎩21.解:联结O B )∵圆心O 在这个三角形的高AD 上∴1112622BD BC ==⨯=)在Rt △ABD中,8AD ===设⊙O 的半径为r ,则OB r =,8OD r =-, 可得 2226(8)r r =+- 解得 254r =22.(1)图略(2)3'21",3'10"(3)设该校初三男生有x 人,则女生有(x +70)人,由题意得:x +x +70=490 解得x =210.x +70=210+70=280(人). )280×40%=112(人).答:该校初三女生全部参加800米长跑测试可获得满分的人数约为112.23.证明:(1)∵四边形ABCD 是平行四边形 ∴ED ∥BF ,得∠EDB =∠FBD ∵EF 垂直平分BD∴BO=DO ,∠DOE =∠BOF =90° ∴△DOE ≌△BOF ∴ EO=FO∴四边形BFDE 是平行四边形 又∵EF ⊥BD∴四边形BFDE 是菱形第21题图(2)∵四边形BFDE 是菱形∴ED=BF ∵AE=ED ∴AE=BF ) 又∵AE ∥BF∴四边形ABFE 是平行四边形 ∴AB ∥EF∴∠ABD =∠DOE ∵∠DOE =90° ∴∠ABD =90° 即AB ⊥BD24.解:(1)把(0,2)、(3,5)分别代入2y x bx c =++得 2593cb c =⎧⎨=++⎩ 解得 22b c =-⎧⎨=⎩ ∴抛物线的解析式为222y x x =-+ ∴抛物线的顶点为(1,1))(2)设点P 到y 轴的距离为d ,⊙P 的半径为r∵⊙P 与y 轴相切 ∴1422d r ==⨯= ∴点P 的横坐标为2±…………………………………………………………………(2分) 当2x =时, 2y = ∴点P 的坐标为(2,2) …………………………………(2分)当2x =-时,10y = ∴点P 的坐标为(2,10)- ………………………………(2分)∴点P 的坐标为(2,2)或(2,10)-.25.解:(1)∵∠BAC = 90° ∴∠B +∠C =90°,∵AD 是BC 边上的高 ∴∠DAC +∠C =90°∴∠B =∠DAC ………………………………………………………………………(1分) 又∵∠EDF = 90°∴∠BDE +∠EDA =∠ADF +∠EDA = 90° ∴∠BDE =∠ADF∴△BED ∽△AFD ……………………………………………………………………(1分)∴DE BDDF AD =…………………………………………………………………………(1分) ∵3cot 4BD AB B AD AC === ∴DE ︰DF =34…………………………………………………………………………(1分)(2)由△BED ∽△AFD 得34BE BD AF AD ==∴4433AF BE x == …………………………………………………………………(1分)∵BE x = ∴3AE x =-∵∠BAC = 90°∴2222425(3)()6939EF x x x x =-+=-+………………………………………(1分) ∵DE ︰D F =3︰4,∠EDF =90°∴ED =35EF ,FD =45EF …………………………………………………………………(1分) ∴216225y ED FD EF =⋅=∴22365432525y x x =-+ (03)x ≤≤ ………………………………………………(2分)(3)能. BE 的长为543255或.……………………………………………………………(5分)(说明:BE 的长一个正确得3分,全对得5分)。

2011年上海市浦东新区中考物理二模试卷

2011年上海市浦东新区中考物理二模试卷

许智柔26题共80分2011年上海市浦东新区中考物理二模试卷参考答案与试题解析一、选择题(共8小题,每小题2分,满分16分)1.(2分)(2015•青浦区一模)我国照明电路电压值是()A.1.5伏B.24伏C.110伏D.220伏【考点】电压、电压表PH313【难易度】容易题【分析】我国照明电路和家庭电路的电压都是220V,安全电压是不高于36V的电压,故D说法正确,A、B、D说法错误.【解答】D.【点评】一些常见的电压值的记忆是考生必须掌握的初中物理知识,如安全电压:不高于36V、家庭电路电压:220V、动力电压:380V,此类题目需要学生要求考生留心生活中的细节,运用所学知识分析解决实际问题,要知道物理来源于生活,又服务于生活.2.(2分)(2013•静安区一模)首先测出大气压值的科学家是()A.托里拆利 B.阿基米德 C.奥斯特D.牛顿【考点】大气压强PH238【难易度】容易题【分析】A、第一次精确地测出大气压值的实验是托里拆利实验,是意大利科学家托里拆利最早通过玻璃管、水银、刻度尺等完成测量的,符合题意;B、流体静力学的一个重要原理,它指出,浸入静止流体中的物体受到一个浮力,其大小等于该物体所排开的流体重量,方向垂直向上并通过所排开流体的形心,这结论是阿基米德首先提出的,故称阿基米德原理,不符合题意;C、奥斯特发现了电流的磁效应,不符合题意;D、牛顿发现了万用引力定律,不符合题意.【解答】A.【点评】考生在学习物理知识时,要对有关物理规律的发展史和对应的科学家有一定的了解并掌握,这样才能在做选择题时将相应的实验与对应的发现者一一对应起来,平时在学习过程中应加强记忆.3.(2分)(2011•浦东新区二模)“未见其人,先闻其声”主要是依据声音特征的()A.响度 B.音调 C.频率 D.音色【考点】音调、响度与音色PH252【难易度】容易题【分析】声音的特征只有三个:音调、音色、响度;决定音调的因素:物体振动的频率(就是每秒振动的次数);决定响度的因素:①物体的振动幅度②距离声源的距离,越近响度越大;决定音色的因素:主要是发生振动的物体的材料;不同人声音的音色不同,区别出熟悉的人谁在说话,是因为音色不同的原因,故D正确,A、B、C错误.【解答】D.【点评】本题主要考查的是声音的三个特征即音调、响度、音色,分析题意可知不同人的声音,音调和响度可能相同,但音色一般不同,考生要知道音调、响度、音色是从不同角度描述声音的,且影响三个特征的因素各不相同,本题考查了学生对音色定义的理解程度.4.(2分)(2007•攀枝花)汽油机工作过程是由四个冲程组成的,其中内能转化为机械能的冲程是()A.吸气冲程 B.压缩冲程 C.做功冲程 D.排气冲程【考点】热机及内燃机的四个冲程PH425【难易度】容易题【分析】工作原理:四冲程内燃机的工作过程是由吸气、压缩、做功、排气四个冲程组成的;(1)吸气冲程:进气门打开,排气门关闭,活塞向下运动,汽油和空气的混合物进入气缸;(2)压缩冲程:进气门和排气门都关闭,活塞向上运动,燃料混合物被压缩;(3)做功冲程:在压缩冲程结束时,火花塞产生电火花,使燃料猛烈燃烧,产生高温高压的气体,高温高压的气体推动活塞向下运动,带动曲轴转动,对外做功;(4)排气冲程:进气门关闭,排气门打开,活塞向上运动,把废气排出气缸;本题抓住内燃机在做功冲程的能量转化,做功冲程是内能转化为机械能的冲程.【解答】C.【点评】解决这类题目学生要会判断热机(蒸汽机、汽轮机、燃气轮机、内燃机、喷气发动机等)的四个冲程(吸气冲程、压缩冲程、做功冲程、排气冲程)和这些冲程具体发生的工作过程,本题考查了内燃机的做功冲程及其能量转化,学生要在平时学习中多多记忆.5.(2分)(2011•浦东新区二模)某凸透镜的焦距为10厘米,当物距为15厘米时,像距可能是()A.5厘米B.10厘米C.20厘米D.30厘米【考点】凸透镜成像规律及其应用PH338【难易度】容易题【分析】已知f=10cm,其中物距为15cm,大于f而小于2f,所以此时成放大倒立的实像,像距大于2f即大于20cm.【解答】D.【点评】解决本类题目需要学生掌握凸透镜成像规律,要知道物距与相距的关系、成像的特点以及其应用,本题中要通过读题判断焦距的大小,再结合凸透镜呈像规律进行解答,这类题目经常出现在中考物理中,属于必考点,学生要熟练掌握.6.(2分)(2011•突泉县二模)甲、乙两小车同时同地做匀速直线运动,它们的s﹣t图象分别如图a和图b所示.请根据图象判断,下列正确的描述是()A.两小车速度一样大 B.甲车运动快C.经6秒两小车一定相距1.8米D.经6秒两小车一定相距3米【考点】路程—时间图像PH266【难易度】中等题【分析】(1)根据速度公式v=计算甲、乙两小车的速度:由a图象得v甲===0.4m/s,由图象b得v乙===0.1m/s,v甲>v乙,甲车运动的快,故A错误,B正确;(2)由a、b图象知,t=6s时,s甲=2.4m,s乙=0.6m,甲、乙两小车同时同地做匀速直线运动,如果两车运动方向相同,它们相距s甲+s乙=2.4m+0.6m=3.0m;如果两车运动方向相反,两车则两车相距s甲﹣s乙=2.4m﹣0.6m=1.8m,故C、D错误.【解答】B.【点评】本题需要学生掌握公式v=并学会利用题给s﹣t图象获得有用的信息,本题的难点在于C、D选项的判断,学生要考虑全面,两车的距离不仅与它们的速度有关,还与它们各自的运动方向有关.7.(2分)(2011•常州校级模拟)如图所示,电源电压保持不变,当电键S闭合后,发现灯不发光.已知电路中只有一处故障,且只发生在L或R上,则()A.用电压表并联在L两端,发现电压表无示数,故障一定是L短路B.用电压表并联在L两端,发现电压表有示数,故障一定是L断路C.用电压表并联在R两端,发现电压表无示数,故障一定是R短路D.用电压表并联在R两端,发现电压表有示数,故障一定是R断路【考点】电流表、电压表在判断电路故障中的应用PH319【难易度】中等题【分析】电路故障要么短路、要么断路,根据电压表有无示数判断电路故障;(1)电压表并联在L两端时,电压表无示数,若L短路,灯泡应该发光与题意不符,故A不正确;(2)电压表并联在L两端时,电压表有示数,灯L断路,所以不发光,故B正确;(3)用电压表并联在R两端时,电压表无示数说明灯L断路;有示数说明灯泡短路或电阻R断路;故CD选项不正确.【解答】B.【点评】本题考查的是电路中电压表示数的变化在判断电路故障中的应用,学生要在平时的学习中牢记一些电压表示数为0时电路的故障情况,这样在考试中才能更为快速的发现问题出现的准确位置.8.(2分)(2010•上海)如图所示,两个盛有等高液体的圆柱形容器A和B,底面积不同(S A<S B),液体对容器底部的压强相等,现将甲球浸没在A容器的液体中,乙球浸没在B容器的液体中,容器中均无液体溢出,若此时液体对各自容器底部的压力相等,则一定是()A.甲球的质量小于乙球的质量 B.甲球的质量大于乙球的质量C.甲球的体积小于乙球的体积 D.甲球的体积大于乙球的体积【考点】液体内部压强PH236;压强PH232【难易度】较难题【分析】液体的压强公式为p=ρg h,压强的定义式p=,开始时液体对容器底部的压强相等,即P A=P B,深度h相同,根据液体的压强公式P=ρgh可得容器内的液体密度ρ相同;又S A<S B,P A=P B,根据压强的定义式P=,故有F A<F B;后来,浸没甲、乙球后,液体对各自容器底部的压力相等,即F A=F B;可见B容器内增大的液体压力小于A容器内增大的液体压力,即△F B<△F A;根据F=PS得:△p B S B<△p A S A,再根据p=ρgh得:ρg△h B S B<ρg△h A S A;即△h B S B<△h A S A;即△V B<△V A;又因为增大的体积△V就等于球的体积,即△V=V球;故有V乙<V甲,故D正确,C错误;由于两球的空心、实心情况不知,且两球的密度大小不知;故两球的质量大小关系不定,故AB错误;【解答】D.【点评】本题需要学生根据液体压强公式p=ρgh和压强的定义式p=,一步步进行推理,根据题给条件列出公式,得到推论后再带入下一个问题中进行推断,这类题目需要学生有较强的逻辑推理能力,扎实的基本功.二、填空题(共8小题,每小题3分,满分24分)9.(3分)(2011•浦东新区二模)组成物质的分子在不停地做无规则.原子是由原子核和核外带负电的组成.安全合理地利用原子核中蕴藏的能,可以造福人类.【考点】分子动理论PH122;分子和原子PH121.【难易度】容易题【分析】(1)分子热运动理论:研究物质热运动性质和规律的经典微观统计理论。

上海宝山区2011年中考二模英语试题及答案(word版)

上海宝山区2011年中考二模英语试题及答案(word版)

宝山(嘉定)区2011年第二学期九年级质量调研考试英语试卷第一部分听力略Part 2 Vocabulary and Grammar (第二部分词汇和语法)Ⅴ. Choose the best answer(选择最恰当的答案):(共26分)31. Jack has bought ___________ used car. It is much cheaper than a new one.A. theB. anC. aD. /32. Wang Fang plans to take __________ presents to her friends in New York when she goes thereat Christmas.A. plenty ofB. huge mounts ofC. a great deal ofD. anamount of33. We can get much ____________ from these new books.A. photosB. informationC. ideasD.stories34. John lost __________ new calculator on his way to school yesterday.A. hisB. heC. himD.himself35. Tom is reading ___________ composition. It was all written by himself.A. a 80---wordsB. an 80---wordsC. an 80—wordD. a80—word36. Some people enjoy Mcdonald’s hamburgers, but __________ prefer Chinese fast food.A. anotherB. the otherC. othersD.the others37. We have got four different answers to that question, but __________ of them is correct.A. allB. neitherC. bothD.none38. Your idea sounds much ___________ than his.A. interestingB. interestedC. more interestingD. moreinterested39. Bill gets up early every day except Saturday or Sunday, because he __________ go to school.A. mustn’tB. needn’tC. shouldn’tD.can’t40. Who can __________ me the meaning of that sign?A. speakB. sayC. talkD. tell41. Some questions ___________ at their class meeting last week?A. raisedB. roseC. were risenD.were raised42. The Browns __________ dinner when I rang them.A. are havingB. hadC. was havingD.were having43. What are you doing to do when you finish __________ the room?A. to cleanB. cleaningC. cleanD.cleaned44. My grandmother __________ wash clothes by hand but now she __________ doing it with thewashing machine.A. used to …used toB. is used to …is used toC. is used to…used toD. used to…is used to45. A: I didn’t sleep well last night and feel quite sleepy now.B: Why not stop __________ ?A. to workB. to have a restC. having a restD. togo on with your work46. Please pass the glasses, my dear. I can __________ read the words in the newspaper.A. hardlyB. reallyC. ratherD.clearly47. Keep the window _________ while you are in.A. openB. openingC. openedD.to open48. We are ___________ to hear that the girl can run at an __________ speed.A. amazed…amazedB. amazing…amazingC. amazed…amazingD.amazing…amazed49. Liu Xiang is a world—famous sports star. His name is familiar ___________ almosteverybody in China.A. toB. inC. withD. at50. Will you please __________ the radio? The neighbours are having a rest.A. turn downB. turn upC. turn overD. turninto51. I really do no know ___________ your question.A. which to doB. which to answerC. what to doD.which to answer52. Could you please tell me if ____________ next Sunday?A. Alice will be backB. Alice is backC. Alice would be backD. Alicehad been back53. ___________ important advice you have given us!A. HowB. WhatC. What aD. Whatan54. Mike failed in yesterday’s test. ____________.A. Either did JohnB. So did JohnC. Neither did JohnD. SoJohn did55. They formed an English study group last week. The underlined part means “___________”A. organizedB. put upC. startedD.built56. A: __________ , did you do it yourself?B : I am glad you like it. My sister did it for me.A. I do not think soB. I like your new hair styleC. I have no ideaD. You look nice todayⅥ. Complete the sentences with the given words in their proper forms (用括号中所给单词的适当形式完成下列句子);(共8分)57. At the yesterday’s English Ev ening, all of us enjoyed___________ (we).58. Look at the photo! The__________ man from the right is my class teacher. (five)59. Sam has broad shoulders and__________ arms. (power)60. It is common___________ that the sun sets down in the west. (know )61. My father often___________ that piece of music alone at home. (joy )62. Susan is__________ sorry for what she has done. (terrible)63. Finally, they found a __________ to the problem. (solve)64. Bill looked___________ but could see nothing unusual.(head)Ⅶ. Rewrite the following sentences as required(根据所给要求,改写下列句子,每空格限填一词):(共12分)65. My parents go travelling abroad once a year.(对划线部分提问)___________ ___________ do your parents go travelling abroad?66. The Smiths invited the professor to the party.(改为被动语态)The professor__________ ___________ the party by the Smiths.67. The boy never has lunch at school. (改为反义疑问句)The boy never has lunch at school, __________ __________ ?68. His mother cooked very delicious food for us.(改为感叹句)___________ ____________ his mother cooked for us!69. Mr. White wondered where he could buy a map of Shanghai.(改为简单句)Mr. White wondered __________ __________ buy a map of Shanghai.70. The Huangpu River is not as deep as the Yangtze River.(保持原句意思)The Yangtze River is __________ __________ the Huangpu River.Part 3 Reading and Writing (第三部分读与写)Ⅷ. Reading Comprehension(阅读理解)(共56分)A. True or False (判断下列句子是否符合短文内容,符合的用“T”表示,不符合的用“F”表示):(7分)As one of the Hollywood’s all-time greatest actress, Audrey Hepburn(奥黛丽·赫本)is famous all over the world. When Hepburn died in 1993, the world mourned(哀悼)the loss of a great beauty, a great actress and a great humanitarian(人道主义者).Born in Belgium on 4th May 1929, Hepburn dreamed of becoming a successful ballet dancer. She had also been a model before she entered the film industry. In 1951, while acting in Monte Carlo Baby, Hepburn met the famous French writer Colette, who was attracted by Hepburn’s beauty and charm. She insisted that Hepburn was the perfect girl to play the leading role in Gigi, a play based on her novel. That event marked the beginning of Hepburn’s successful career. Shortly after, Hepburn was chosen to play the leading role of a young princess in the Hollywood film Roman Holiday. It was a big success and earned her an Oscar for Best Actress.During her lifetime, Hepburn earned four more Oscar nominations(提名). In 1989, she madeher final appearance in her last film Always and played the role of an angel. Throughout her acting years, she acted in only on TV series, Gardens of the world with Audrey Hepburn. By showing us the beauty of nature, Hepburn wanted to remind us that we should protect the environment.Hepburn is remembered not just as a great actress, but also as a great humanitarian. She was honored with a number of awards because of her efforts in her charity work. In 1992, the President of the United States presented her with the Presidential Medal of Freedom(总统自由勋章). In 1991, Hepburn discovered that she had cancer. In 1993, at the age of63. she passed away(died)peacefully in her sleep.71. Audrey Hepburn was born in a country of Europe.72. In her early age, she was a successful ballet dancer.73. The great success in the Hollywood film Roman. Holiday made her the winner of an Oscar forBest Actress.74. During her lifetime, she acted in several TV plays.75. Hepburn didn’t appear in any films after she played a role in the film Always.76. Audrey Hepburn’s successful career lasted about sixty years.77. People remember Hepburn not only as a great actress but also a kind lady.B. Choose the best answer (根据短文内容,选择最恰当的答案):(7分)At 2:30 on December 5, 1945, five US Navy (海军) training planes took off in clear weather from the base Lauderdale, Florida. The planes flew east over the coast--- and disappeared. The group was Flight 19, on a run between Florida and Bahamas. Taylor was the group leader. At about 3:40, Taylor reported that his compasses(指南针)were not reading properly. The other planes followed their leader aimlessly, firs east, then west, then northeast over the ocean, as Taylor tried to make sure of the direction by radio. Then, suddenly Taylor was heard to give orders to dive.Quickly, two giant (very large) Martin seaplanes were sent up to search for Flight 19. Several hours later, the wind became strong and visibility(能见度)dropped. A return to base was ordered. But only one of the Martin seaplanes landed. Four days later, the Navy and Coast(海岸部队)combed a 100,000 square-mile area with more than 100 planes and ships. No sign was ever shown of the missing planes.Today, people have noted the disappearance of many ships and planes in the southwest part of the North Atlantic and began to call this area the Bermuda Triangle(百慕大三角).The points of the triangle are Bermuda, Puerto Rico(波多黎各)and a spot in the Gulf of Mexico(墨西哥湾), west of Florida. It is a two – faced water world of tiny island, bright beaches and beautiful waters. Yet thick fogs, powerful currents(急流)and sudden storms are hidden behind this smiling surface.78. Five US Navy training planes took off on ___________.A) on a clear night B) on a clear dayC) on a rainy night D) on a rainy day79. ___________ was the leader of a group of planes.A) Lauderdale B) Florida C) Taylor D) Bahamas80. The US Navy and Coast sent ___________ to look for the missing Flight 19.A) over 100 planes B) 100 planes and 100 shipsC) 100 planes and ships D) over 100 planes and ships81. Why did Flight 19 disappear?A) Because the wind became strong and visibility dropped.B) Because Taylor was given wrong order to dive.C) Because something unknown made the compass unable to work as usual.D) Because Taylor couldn’t read his compasses correctly.82. In what position did many ships and planes disappear according to the passage?A) In the southwest part of the Atlantic Ocean.B) In the northeast part of the Atlantic Ocean.C) To the southwest part of Bermuda in the Atlantic Ocean.D) To the northeast part of Bermuda in the Atlantic Ocean.83. How many planes disappeared altogether that day?A) Five B) Six C) Two D) Only one84. The word “combed” in the passage means___________.A) covered with B) flew overC) did up ones hair with a comb D) searched all overC. Choose the words or expressions to complete the passage(选择最恰当的单词或词语,完成短文):(14分)In the past, if an American wanted to buy a new car or a TV set, he or she worked and saved money until there was ____85____ to pay for the item. But today, even people who are flat broke (破产的)can walk out with thousands of dollars worth of goods. They have credit cards.Credit cards are pieces of plastics that banks give people. People can charge things on their credit cards and ____86____ them later. Most credit cards give people months or years to pay though they must pay a little every month.Getting a credit card is a piece of cake (very easy). Banks like credit cards because ____87____ can charge (ask in payment) up to 20 percent interest(利息)on people’s credit card debts. They allow people to charge(透支)up to $9,000 on a single credit card but many Americans have several different credit cards.One American family owed $12,000 to credit card companies before it decided it was in trouble. Both parents had good jobs and they owned a house, but they spent more than they could afford ____88____ their three children and they spent a night on the town every week. “It was really easy to whip out(迅速抽出)a piece of plastic,” said the mother. Companies called collection agencies began calling the family at all hours. The agencies threatened to ____89____ the family’s house. Finally, they got professional help to pay off their debts(债). For two years, they tightened their belts(锁紧裤袋)and paid $500 each month to the credit card companies.Altogether, Americans owe $570 billion, not coming loans(贷款)for their home. Sometimes credit card users get____90____ trouble because they run up big bills(欠下大笔钱款)and lose their jobs or get divorced(离婚). But almost half of those in trouble simply didn’t ____91____ their money wisely.85. A) much B) a lot C) enough D) quite a few86. A) spend B) pay for C) return D) buy87. A) they B) it C) one D) ones88. A) to B) on C) with D) for89. A) take B) carry C) hold D) bring90. A) on B) with C) to D) in91. A) manage B) keep C)control D) costD. Read the passage and fill in the blanks with proper words(在短文的空格内填入适当的词,使内容通顺,每空格限填一词,首字母已给):(14分)The newest touch screen mobile phone that has been recently introduced by Apple Company is the Apple iPhone 4. It has surely a_____92_____ attention from fashion persons from all over the world. Exquisite(优美精致的)appearance, unique design, high-quality image and sound enjoyment, powerful iTunes store, all these make iPhone become p____93____ as soon as it was released(发行,推出). After much expectation, people lined up for hours at stores around the world to buy the latest smart-phone(智能手机)by Apple.The phone can help people realize the dream of video calling. Friends can say hello with a big smile from across the globe. The mother can take a good look at her son a____94_____. The communication will be more convenient.The iPhone 4 is faster, thinner, has a longer battery life, and it features(以……特色)video calling. Apple is not the only c____95____ that makes so-called smart-phones that allow users to access the Internet. But loyal customers say its simplicity(简易)akes the iPhone stand out(出色). All of these a_____96_____ features of the Apple iPhone 4 will ensure(保证)high quality performance that you will not experience w_____97_____ any other types of phone. In addition, as this phone is multi-functional(多功能的), it can do more than just the usual call and text(短信), you will surely appreciate everything that it can actually do for you. More perfect appearance and powerful functions will bring another round of Apple frenzy(狂热).But technology expert says Apple’s iPhone faces g rowing competition from o____98_____ companies, such as Google, that make their own smart-phones. With competition, experts expect prices to drop, making smart-phones much more accessible to(更易买到)consumers around the world.E. Answer the question(根据短文内容回答下列问题):(14分)Quite a few people believe that the phases of the moon(月相)affect the behavior of human and other creatures. That is known as the lunar effect(月相效应). The lunar effect has been around for many centuries. The power of the moon is often used to explain a wide range of events, such as human insanity(精神错乱), and increases in violent crimes(暴力犯罪)and traffic accidents. According to some traditions, for example, before the coming of modern techniques, surgeons(外科医生)would refuse to operate on the full moon nights because of the increased risk of death of the patient through blood loss. The idea behind the lunar effect ahs even found its way into the news. For example, it has been said that the full moon may have influenced voters’(选民)behavior in the 2000 U.S. presidential election(总统大选).Does the moon affect our behavior at all? Some people say it does. They say the moon causes the tides, so surely that the moon has an effect on people and we ourselves are full of the water, too. But scientists point out that the moon only affects unrestrained(不受控制的)waters, such as oceans. The water in our bo dies isn’t even comparable(可比较). And over fifty years of researchhas shown nothing to prove the existence(存在)of a causative(引起联系的)link between the moon and areas such as mental illness, birth rates, crime, or accidents.There is an explanation for why people link the full moon to unusual human behavior. The reason is that people have selective memories(选择性记忆). When something unusual happens and there is a full moon, people might notice the moon and think it is to be blamed.99. What do quite a few people believe?100. What is used to explain wide range of events?101. Why would surgeons refuse to operate on the full moon nights?102. Do some people say that the moon affect our behavior?103. Scientists hardly agree that the moon affect people’s behav ior, do they?104. How long has the research on the lunar effect been done?105. Why do people link the full moon to unusual human behavior?Ⅸ. Writing (作文):(共18分)106. Write a passage of at least 60 words on the topic “Everyone Needs Help”(以“每人都需要帮助”为题,写不少于60个词的短文)Use the following points as a guide:1 Did you get any help from others before?2 Did you give any help to people when they needed?3 Tell your story.(注意:短文中不得出现考生的姓名、校名及其他相关信息,否则不予评分。

上海中考数学易错题整理

上海中考数学易错题整理

CEBFDA第8题2011年数学模拟卷一、选择题1.数轴上任意一点所表示的数一定是( ) A .整数 B .有理数 C .无理数D .实数2.一次函数32y x =-+的图像一定不经过( )A .第一象限;B .第二象限;C .第三象限;D .第四象限. 二、填空题1.将二次函数y=2(x ﹣1)2﹣3的图象沿着y 轴向上平移3个单位,那么平移后的二次函数图象的顶点坐标是 _________ .2.经过测量,不挂重物时弹簧长度为6厘米,挂上2.5千克的重物时弹簧长度为7.5厘米,那么弹簧长度y (厘米)与所挂重物的质量x (千克)的函数解析式为 _________ .3.布袋中有除颜色以外完全相同的8个球,3个黄球,5个白球,从布袋中随机摸出一个球是白球的概率为 .4. 将二元二次方程0562=+-x xy x 化为二个一次方程为 . 5.在△ABC 中,点D 在边BC 上,BD =2CD ,b AC a AB ==,,那么=AD . 6.已知⊙1O 与⊙2O 两圆内含,321=O O ,⊙1O 的半径为5,那么⊙2O 的半径r 的取值范围是 .7.在△ABC 中,∠C=90°,AC=4,BC=2,△ABC 绕着点C 旋转后, 点B 落在AC 边上的点B ’,点A 落在点A ’,那么tan ∠AA’B’的值为 .8、 如图,将矩形纸片ABCD(AD>DC)的一角沿着过点D 的直线折 叠, 使点A 与BC 边上的点E 重合,折痕交AB 于点F.若BE:EC=m:n ,则AF:FB= . 9.已知:如图,在Rt△ABC 中,∠C=90°,AC=BC ,AB=6.如果将△ABC 在直线AB 上平行移动2个单位后得△A′B′C′,那么△CA′B 的面积为 _________ .10.如图,在等边△ABC 中,9A C =,点O 在A C 上,且3A O =,点P 是A B 上一动点,连结O P ,将线段O P 绕点O 逆时针旋转60得到线段O D .要使点D 恰好落在B C 上,则A P 的长是 .11.已知A 是平面直角坐标系内一点,先把点A 向上平移3个单位得到点B ,再把点A 绕点B 顺时针方向旋转90°得到点C ,若点C 关于y 轴的对称点为(1,2),那么点A 的坐标是 .第9题13.把抛物线x x y 22-=向左平移一个单位,所得抛物线的表达式为: . 三、解答题23.(每小题6分,满分12分)已知:如图,在直角梯形ABCD 中,AD ∥BC ,AB ⊥AD ,BC=CD ,BE ⊥CD ,垂足为点E ,点F 在BD 上,连接AF 、EF . (1)求证:AD=ED ;(2)如果AF ∥CD ,求证:四边形ADEF 是菱形. 证明:(1)∵BC=CD ∴∠CDB=∠CBD∵AD ∥BC ∴∠ADB=∠CBD ∴∠ADB=∠CDB ,又∵AB ⊥AD ,BE ⊥CD ∴∠BAD=∠BED=90°, ∴在△ABD 和△EBD 中 ∵∠ADB=∠CDB ,∠BAD=∠BED ,BD=BD , ∴△ABD ≌△EBD ∴AD=ED .( 2 )23.(本题满分12分,第(1)题7分,第(2)题5分)如图,在⊙O 中,直径AB 与弦CD 垂直,垂足为E ,连接AC ,将△ACE 沿AC 翻折得到△ACF ,直线FC 与直线AB 相交于点G . (1)证明:直线FC 与⊙O 相切;(2)若BG OB =,求证:四边形OCBD 是菱形. .解:(1)连接O C .∵O A O C = ∴12∠=∠由翻折得,△AFC ≌△AEC∴13∠=∠,90F AEC ∠=∠=︒ ∴23∠=∠. ∴OC ∥AF ∴90O C G F ∠=∠=︒ ∵点C 在圆上 ∴直线FC 与⊙O 相切 (2)23.(本题满分12分,第(1)小题满分6分,第(2)小题满分6分)已知:如图,在□ABCD 中,点E 、F 分别是AB 、CD 的中点,CE 、AF 与对角线BD 分别相交于点G 、H .(1) 求证:DH=HG=BG ;(2) 如果AD ⊥BD ,求证:四边形EGFH23、(本题12分)如图,在平面直角坐标系中,等腰梯形OABC ,CB//OA ,且点A 在x 轴正半轴上.已知C(2,4),BC= 4.(1)求过O 、C 、B 三点的抛物线解析式,并写出顶点坐标和对称轴;(2)经过O 、C 、B 三点的抛物线上是否存在P 点(与原点O 不重合),使得P 点到两坐标轴的距离相等.如果存在,求出P 点坐标;如果不存在,请说明理由. 解:(1) ∵C(2,4), BC=4 且 BC//OA ∴ B(6,4)设抛物线为bx ax y +=2()0≠a 将C(2,4),B(6,4)代入得: ∴x x y 38312+-=∴顶点)316,4( 对称轴:直线4=x(第23题图)。

2011年上海市黄浦区初中数学二模卷试题及参考答案【纯word版,完美打印】

2011年上海市黄浦区初中数学二模卷试题及参考答案【纯word版,完美打印】

F O · E D C BA FED C B A 黄浦区2011年初三学业考试模拟考数学试卷(完卷时间:100分钟,满分:150分) 2011年4月14日考生注意:所有答案都写在答题卷上一、选择题【每题列出的四个选项中,有且只有一个是正确的】(本大题共6题,每题4分,满分24分)1. 数轴上点A 到原点的距离为2.5,则点A 所表示的数是( ).(A )2.5 (B )5.2- (C )2.5或5.2- (D )0 2. 计算1x x÷的结果是( ). (A )1x (B )x (C )2x (D )21x3. 下列方程中,2是其解的是( ). (A )240x -= (B )121=-x (C )111=-+x x (D )20x += 4. 下列点位于函数3y x=图像上的是( ). (A )()1,2 (B )()1,3-- (C )()1,2- (D )()1,3- 5. 如图1,AD 是△ABC 的角平分线,将△ABC 折叠使点A 落在点D 处,折痕为EF ,则四边形AEDF 一定是( ).(A )矩形 (B )菱形 (C )正方形 (D )梯形(图1) (图2)6. 如图2,六边形ABCDEF 是⊙O 的内接正六边形,若m OA =,n OC =,则向量OE 可表示为( ).(A )n m + (B )n m - (C )n m +- (D )n m -- 二、填空题(本大题共12题,每题4分,满分48分) 7. 8与12的最大公因数是_______________. 8. 分解因式:=+-652x x _______________.DC BA D CB ACD BA O CB A9. 函数()22-=x x f 的定义域是_______________.10. 如果关于x 的一元二次方程230x kx k -++=有两个相同的实数根,那么k 的值是_____.11. 方程294x -=的解是_______________.12. 将一次函数2-=x y 的图像平移,使其经过点()3,2,则所得直线的函数解析式是_______________.13. 面包店在晚上六点后开始对当天面包进行降价促销,每个便宜1元钱,这样花20元就可以比原价多买1个面包,设每个面包原价为x 元,则由条件可列方程_______________. 14. 小明左边口袋中放有三张卡片,上面分别写着1、2、3,他右边口袋中也放有三张卡片,上面分别写着4、5、6,他任意地从两个口袋中各取出一张卡片,则所得两张卡片上写的数之和为偶数的概率是_______________.15. 如图3,在△ABC 中,AB =AC ,AD ∥BC ,如果∠BAC ∶∠CAD =1∶2,那么∠B =_____度.(图3) (图4)16. 如图4,AB 与CD 相交于点O ,AD ∥BC ,AD ∶BC =1∶3,AB =10,则AO 的长是___________.17. 如图5,在等腰梯形ABCD 中,AD ∥BC ,AD =4,BC =2,tan A =2,则梯形ABCD 的面积是_______________.(图5) (图6)18. 如图6,在△ABC 中,AB =4,AC =10,⊙B 与⊙C 是两个半径相等的圆,且两圆相切,如果点A 在⊙B 内,那么⊙B 的半径r 的取值范围是_______________. 三、解答题(本大题共7题,满分78分) 19.(本题10分)计算:()()011420112010tan 6012-⎛⎫⨯---+︒- ⎪⎝⎭.BC AD 1280 930 600470 学校 人数 市重点 高中 区重点 高中 普通 完中 中专、 职校 F E D C B F E DC B N M 20.(本题10分)已知二次函数()21y x kx k =--+的图像与y 轴交于点A ,且经过点()4,5.(1)求此二次函数的解析式;(2)将点A 沿x 轴方向平移,使其落到该函数图像上另一点B 处,求点B 的坐标. 21.(本题10分)如图7,在△ABC 中,∠ACB ︒=90, AC =6,BC =8,CD 是边AB 上的中线. (1)求CD 的长; (2)请过点D 画直线AB 的垂线,交BC 于点E ,(直接 画在图中)并求CE 的长.(图7)22.(本题10分)某市东城区2011年中考模拟考的总分(均为整数)成绩汇总如下表: 成绩 461以下 461 到 470 471 到 480 481 到 490 491 到 500 501 到 510 511 到 520 521 到 530 531 到 540 541 到 550 551 到 560 561 到 570 571 到 580 580以上 合计人数 628 88 110 98 120 135 215 236 357 380 423 356 126 28 3300 (1)所有总分成绩的中位数位于( );(A )521到530(B )531到540(C )541到550(D )551到560(2)区招生办在告知学生总分成绩的同时,也会将学生的定位分告诉学生,以便学生后期的复习迎考,其中学生定位分的计算公式如下:100⨯学生总分名次总人数所得结果的整数部分(总分名次是按高到低排序),如学生甲的总分名次是356名,由35610010.83300⨯=,则他的定位分是10.如果该区小杰同学的定位分是38,那么他在区内的总分名次n 的范围是_____________;(3)下图是该区2011年本区内各类高中与高中阶段学校的招生人数计划图:根据以往的经验,区的中考模拟考的成绩与最终的学生中考成绩基本保持 一致,那么第(2)题中小杰希望通过后阶段的努力,争取考入市重点高中(录取总分按市重点高中、区重点高中、普通完 中与中专职校依次下降),你估计小杰在现 在总分成绩上大致要提高________分.23.(本题12分)如图8,在菱形ABCD 中,AE ⊥BC ,AF ⊥CD ,垂足为E 、F . (1)求证:△ABE ≌△ADF ; (2)若∠BAE =∠EAF ,求证:AE =BE ;(3)若对角线BD 与AE 、AF 交于点M 、N ,且BM =MN (如图9). 求证:∠EAF =2∠BAE .B C D O xy A NMA 1 D 1C 1 B 1D 2 C 2 B 2 A 2(图10) MA B C DH (图11)(图8) (图9)24.(本题12分)如图10,正方形ABCD 、正方形A 1B 1C 1D 1、正方形A 2B 2C 2D 2均位于第一象限内,它们的边平行于x 轴或y 轴,其中点A 、A 1、A 2在直线OM 上,点C 、C 1、C 2在直线ON 上,O 为坐标原点,已知点A 的坐标为()3,3,正方形ABCD 的边长为1. (1)求直线ON 的表达式;(2)若点C 1的横坐标为4,求正方形A 1B 1C 1D 1的边长;(3)若正方形A 2B 2C 2D 2的边长为a ,则点B 2的坐标为( ).(A )(),2a a (B )()2,3a a (C )()3,4a a (D )()4,5a a25.(本题14分)如图11,在△ABC 中,∠ACB =︒90,AC =BC =2,M 是边AC 的中点,CH ⊥BM 于H .(1)试求sin ∠MCH 的值; (2)求证:∠ABM =∠CAH ; (3)若D 是边AB 上的点,且使△AHD 为等腰三角形,请直接写出AD 的长为________.黄浦区2011年初三学业考试模拟考数学参考答案与评分标准一、选择题1、C ;2、C ;3、A ;4、B ;5、B ;6、D . 二、填空题7、4; 8、()()23x x --; 9、2x >; 10、6或2-; 11、5±; 12、1y x =+; 13、202011x x =--; 14、49;15、72; 16、52; 17、6; 18、47r <<. 三、解答题19、解: 原式=()12131---+-————————————————(3分)=12131-+-——————————————————(3分) =3112++———————————————————(3分) =3322+.———————————————————(1分) 20、解:(1)由点()4,5在函数图像上,得()51641k k =--+,———————————————(2分) 解得2k =,————————————————————(2分)所以函数解析式是223y x x =--.——————————(1分) (2)由(1)可知点A 的坐标为()0,3-,对称轴为直线1x =,—(3分)又点B 是由点A 沿x 轴方向平移后所得,所以点A 和点B 是关于直线1x = 对称的,则点B 坐标为()2,3-.——————————————(2分)21、解:(1)在△ABC 中,∠ACB ︒=90,AC =6,BC =8, 则2210AB AC BC =+=.——————————————(2分)又CD 是边AB 上的中线, 所以152CD AB ==.—————————————————(2分) (2) 作图(略). ———————————————————(1分)∵DE ⊥AB ,∴∠BDE =90︒=∠ACB , 又∵∠B =∠B ,∴△EDB ∽△ABC ,—————————————————(2分)∴BE BA BD BC =,又DB =152AB =,———————————(1分) ∴5102584BE ⨯==,————————————————(1分) ∴74CE BC BE =-=.————————————————(1分)22、解:(1)B ;——————————————————————(4分)(2)12541287n ≤<;————————————————(4分) (3) 20. ——————————————————————(2分)23、解:(1)∵菱形ABCD ,∴AB =AD ,∠ABE =∠ADF ,————————————(2分) 又∵AE ⊥BC ,AF ⊥CD ,∴∠AEB =∠AFD ,————————————————(1分) ∴△ABE ≌△ADF . ————————————————(1分) (2)∵菱形ABCD ,∴AB ‖CD , 又∵AF ⊥CD , ∴AF ⊥AB ,∴∠BAF =90︒,又∠BAE =∠EAF ,∴∠BAE =45︒,∠AEB =90︒,———————————(2分) ∴∠B =45︒=∠BAE ,———————————————(1分) ∴AE =BE . ———————————————————(1分) (3) ∵△ABE ≌△ADF ,∴∠BAE =∠DAF ,AB =AD , ∴∠ABM =∠ADN , ∴△ABM ≌△ADN .∴AM =AN ,———————————————————(1分) 又∵∠BAN =90︒, BM =MN , ∴AM =MN =AN ,∴∠MAN =60︒,——————————————————(1分) ∴∠MAB =30︒,——————————————————(1分) ∴∠EAF =2∠BAE . ————————————————(1分) 24、解:(1)由点A 的坐标为()3,3,正方形ABCD 的边长为1.得点B 的坐标为()2,3,点C 的坐标为()2,4,———(1分) 令直线ON 的表达式为y kx =,——————————(1分) 则42k =,解得2k =,—————————————(1分) 所以直线ON 的表达式为2y x =.—————————(1分)(2)由点C 1的横坐标为4,且在直线ON 上,所以C 1的坐标为()4,8,令正方形A 1B 1C 1D 1的边长为l ,—(1分) 则B 1的坐标为()4,8l -,A 1的坐标为()4,8l l +-,——(1分) 由点A 的坐标为()3,3,易知直线OM 的表达式为y x =, 又点A 1在直线OM 上,则48l l +=- ,———————(1分) 解得2l =,即正方形A 1B 1C 1D 1的边长为2. ——————(1分) (3)B . ————————————————————————(4分) 25、解:(1)在△MBC 中,∠MCB =︒90,BC =2,又∵M 是边AC 的中点,∴AM =MC =21BC =1,——————————————————(1分) ∴MB =52122=+, ————————————————(1分)又CH ⊥BM 于H ,则∠MHC =︒90,∴∠MCH =∠MBC ,——————————————————(1分) ∴sin ∠MCH =55CM BM =.————————————————(1分) (2)在△MHC 中,5sin 5MH CM MCH =⋅∠=.———————(1分) ∴AM 2=MC 2=MB MH ⋅,即MAMBMH MA =,————————(2分) 又∵∠AMH =∠BMA ,∴△AMH ∽△BMA ,——————————————————(1分) ∴∠ABM =∠CAH . ——————————————————(1分) (3)5102、528、22.—————————————————(5分)。

2011年上海中考数学二模试题

2011年上海中考数学二模试题

2011年上海中考数学二模试题及答案一、 选择题: 1.3的倒数是( )A .-3B .3C .13 D .13- 2.计算232(3)x x ⋅-的结果是( )A .56x - B .56x C .62x - D .62x3.⊙O 的半径为4,圆心O 到直线l 的距离为3,则直线l 与⊙O 的位置关系是( )A .相交B .相切C .相离D . 无法确定 4.使分式24xx -有意义的x 的取值范围是( ) A . 2x = B .2x ≠ C .2x =- D .2x ≠-5.不等式组2030x x ->⎧⎨-<⎩的解集是( )A .2x >B .3x <C .23x <<D .无解 6.如图,⊙O 的直径CD 过弦EF 的中点G ,∠EOD =40°,则∠DCF 等于( )A .80°B . 50°C . 40°D . 20° 7.如图,是有几个相同的小正方体搭成的几何体的三种视图, 则搭成这个几何体的小正方体的个数是.( ) A .3 B .4 C . 5 D . 68.观察市统计局公布的“十五”时期重庆市农村居民人均 收入每年比上一年增长率的统计图,下列说法正确的是( ) A .2003年农村居民人均收入低于2002年B .农村居民人均收入比上年增长率低于9%的有2年C .农村居民人均收入最多时2004年OCFG DE俯视图左视图主视图时间:(年)20052004200320022001D .农村居民人均收入每年比上一年的增 长率有大有小,但农村居民人均收入在持续增加9.免交农业税,大大提高了农民的生产积极性,镇政府引导农民对生产的耨中土特产进行春节期间,这三种不同的包装的土特产都销售了1200千克,那么本次销售中,这三种包装的土特产获得利润最大是( )A .甲B . 乙C .丙D . 不能确定10.现有A 、B 两枚均匀的小立方体(立方体的每个面上分别标有数字1,2,3,4,5,6)。

上海市黄浦区2011年中考二模数学试题(word版)

上海市黄浦区2011年中考二模数学试题(word版)

上海市黄浦区2011 年中考二模数学试题(word 版)
黄浦区2011 年初三学业考试模拟考
数学试卷
(完卷时间:100 分钟,满分:150 分)2011 年4 月14 日
考生注意:所有答案都写在答题卷上
一、选择题【每题列出的四个选项中,有且只有一个是正确的】(本大题共
6 题,每题4 分,满分24 分)
1. 数轴上点A 到原点的距离为
2.5,则点A 所表示的数是(). (A)2.5 (B)(C)2.5 或(D)0
2. 计算的结果是().
(A)(B)(C)(D)
3. 下列方程中,2 是其解的是().
(A)(B)(C)(D)
4. 下列点位于函数图像上的是().
(A)(B)(C)(D)
5. 如图1,AD 是△ABC 的角平分线,将△ABC 折叠使点A 落在点D 处,折痕为EF,则四边形AEDF 一定是().
(A)矩形(B)菱形(C)正方形(D)梯形
(图1)(图2)
6. 如图2,六边形ABCDEF 是⊙O 的内接正六边形,若,,则向量可表示为().
(A)(B)(C)(D)。

2011年上海市闵行区中考数学二模试卷

2011年上海市闵行区中考数学二模试卷

2011年上海市闵行区中考数学二模试卷一、选择题(共6小题,每小题4分,满分24分)1.(4分)(2011•闵行区二模)数轴上任意一点所表示的数一定是()A.整数 B.有理数C.无理数D.实数【考点】实数的概念M121【难易度】容易题【分析】根据实数与数轴上的点是一一对应的,所以数轴上任意一点所表示的数一定是实数.【解答】故选D.【点评】本题考查了实数和数轴的关系.①每一个实数(有理数或无理数)都可以用数轴上的点来表示;②数轴上的任意一点都表示一个实数.2.(4分)(2011•闵行区二模)已知点A与点B(2,﹣3)关于y轴对称,那么点A的坐标为()A.(﹣3,2)B.(﹣2,﹣3) C.(﹣2,3)D.(2,3)【考点】图形的翻折与轴对称图形M373【难易度】容易题【分析】根据对称的相关知识可设一点B(X,Y),则P关于Y轴对称的点B′坐标为(﹣X,Y),所以点B(2,﹣3)关于y轴对称的点的坐标为(﹣2,﹣3).【解答】故选B.【点评】本题考查平面直角坐标系点的对称性质,学生需掌握平面直角坐标系的基本性质,点对称的特点.3.(4分)(2011•松江区二模)用换元法解分式方程,如果设,那么原方程化为关于y的整式方程是()A.y2+y﹣3=0 B.y2﹣3y+1=0;C.3y2﹣y+1=0 D.3y2﹣y﹣1=0【考点】分式方程M253【难易度】容易题【分析】先把代入方程,可化为,即y2+y﹣3=0.【解答】故选A.【点评】本题主要考查了如何用换元法解分式方程,解题时要注意对方程进行化简.4.(4分)(2011•闵行区二模)已知直线y=kx+b经过第一、二、四象限,则直线y=bx+k 经过()A.第一、三、四象限 B.第一、二、三象限C.第一、二、三象限 D.第二、三、四象限【考点】一次函数的的图象、性质M422【难易度】容易题【分析】已知直线y=kx+b经过第一、二、四象限,则得到k<0,b>0,那么直线y=bx+k经过第一、三、四象限.【解答】故选A.【点评】本题主要考查一次函数图象在坐标平面内的位置与k、b的关系.解答本题注意理解:直线y=kx+b所在的位置与k、b的符号有直接的关系.k>0时,直线必经过一、三象限;k<0时,直线必经过二、四象限;b>0时,直线与y轴正半轴相交;b=0时,直线过原点;b<0时,直线与y轴负半轴相交.5.(4分)(2011•闵行区二模)关于长方体有下列三个结论:①长方体中每一个面都是长方形;②长方体中每两个面都互相垂直;③长方体中相对的两个面是全等的长方形.其中结论正确的个数有()A.0个B.1个C.2个D.3个【考点】直观图的画法M311【难易度】容易题【分析】根据长方体的定义及特点结合各选项来判断①长方体中每一个面可能是长方形也可能是正方形,故错误;②长方体中的3组对面,分别都是平行的,故错误;③长方体中相对的两个面是全等的长方形,故正确.综上可得③正确.【解答】故选B.【点评】本题考查立体图形的基本知识,属于基础题,注意掌握长方体的特点及一些常见立体图形的特点及形状.6.(4分)(2011•城中区二模)已知⊙O1和⊙O2的半径分别为3、5,⊙O1上一点A与⊙O2的圆心O2的距离等于6,那么下列关于⊙O1和⊙O2的位置关系的结论一定错误的是()A.两圆外切 B.两圆内切 C.两圆相交 D.两圆外离【考点】两圆的位置关系M356【难易度】容易题【分析】两圆的位置关系有:相离(d>R+r)、相切(d=R+r或d=R﹣r)、相交(R﹣r<d <R+r).由题意:⊙O1的半径为3cm,⊙O2的半径为5cm,根据圆与圆之间的位置关系,可知若两圆相内切;则圆心距O1O2=2<6,若两圆相外切;则O1O2=8>6故可判断,两圆不可能相切【解答】故选B.【点评】本题主要考查两圆的位置关系.两圆的位置关系有:相离(d>R+r)、相切(外切:d=R+r或内切:d=R﹣r)、相交(R﹣r<d<R+r).二、填空题(共12小题,每小题4分,满分48分)7.(4分)(2016•江宁区一模)计算:(3a3)2=.【考点】整数指数幂的运算M213【难易度】容易题【分析】利用积的乘方的性质:积的乘方,等于把每一个因式分别乘方,再把所得的幂相乘,首先计算积的乘方,再利用幂的乘方乘方性质:底数不变,指数相乘。

上海松江区2011年中考英语二模试题及答案(word版)

上海松江区2011年中考英语二模试题及答案(word版)

松江区2011年第二学期九年级质量调研考试英语试卷第一部分听力略Part 2 Vocabulary and Grammar (第二部分词汇与语法)V. Choose the best answer (选择最恰当的答案):(共26分)31. There are many pavilions within the Expo site. _______one in red is China Pavilion.A) A B) an C) The D) /32. I've lost _______mobile phone. Can I use yours for a call, please?A) I B) my C) me D) mine33. Our class teacher was pleased to know that _______students in his class ate junk food.A) much B) many C) few D) little34. A big fire happened in Jiaozhou Road in Shanghai _______November, 2010.A) by B)on C)with D) in35. The old man in grey was too angry to say _______just now.A) anything B) something C) nothing D) everything36. David felt ill last night and he is feeling even _______today.A) bad B) worse C) betterD)well37. The bowl offish smells_______. It has probably gone bad.A) strange B)well C) nice D) terribly38. I won't see the film this evening because I _______it already.A) will see B) saw C) have seenD) had seen39. Nowadays it is convenient for us _______many things on line.A) buy B) bought C) buyingD) to buy40. Of all the students in our class. Jane works _______.A) harder B) hard C) very hardD) hardest41. An operating room in a hospital should be _______clean.A) recently B) importantly C) quicklyD) spotlessly42. All the supermarkets in Shanghai have stopped _______free plastic bags since 2008.A) provide B) to provide C) providingD) provided43. You _______worry about your study. We will help you if necessary.A) don't need B) needn't C) needn't toD) need to44._______you have made up your mind to lose weight, you'd better eat less in the evening.A) Since B) Although C) UnlessD) Until45. Everyone knows fire is very useful in our daily life, ________it is also dangerous.A) but B)or C) unlessD)so46. The computer enables us to get more information about the world without leaving home. The underlined part means "_______'".A) makes it safe for B) makes it possible forC) makes it necessary for D) makes it enjoyable for47. He told the story so _______that everyone enjoyed it very much.A) usefully B) attractively C) mainlyD) bravely48. There were many new types of cameras in this shop,_______?A) weren't there B) were there C) were theyD) weren't they49. The operation had to be delayed because of the patient's health condition. The underlined part means .A) take off B) set off C) put off D) show off50. Books and magazines can't _________out of the reading room without permission(许可).A) take B) be taken C) taking D)took51. Jenny wasn't at home yesterday afternoon. She _______Mary with her lessons.A) helped B) has helped C) is helping D) was helping52. The tennis match between our two schools was ________exciting ________we all cheered long after it was over.A) too, that B) such, that C) so, that D) both, and53. My mother _______me about what I did at school. She went out without saying a word.A) was interested in B) was angry with C) was proud of D) was careful with54. Our teacher asked us_______.A) why doesn't Jane come for the picnic B) why didn't Jane come for the picnicC) why Jane not come for the picnic D) why Jane didn't come for the picnic55. — Happy birthday, Alice. Here's a present for you.A) The same to you. B) Thank you. It's lovely.C) It's a pleasure. D) You're welcome.56. — It's been raining since last weekend. What awful weather we're having!A) Yes, but it will be fine tomorrow. B) What's the matter?C) That's all right. D) It doesn't matter.VI. Complete the sentences with the given words in their proper forms (用括号中所给单词的适当形式完成下列句子,每空格限填一词):(共8分)57. My cousin Ben has read many detective ________this term. (story)58. This is my ________time to visit the Great Wall in Beijing. (two)59. Some boys are playing football there. These uniforms are perhaps________. (they)60. We attended a lecture given by a great ________yesterday afternoon. (invent)61. My brother's ambition is to fly a plane. He will ________be a pilot in the future. (possible)62. My daughter doesn't take enough exercise but eats a lot, so she looks_______. (health)63. The little girl couldn't find her mother and cried ________in the street. (loud)64. I've bought my new car recently, so I want to ________my old one. (sale)VII. Rewrite the following sentences as required.(根据所给要求,改写下列句子。

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2011普陀区45.I'm not sure whether this newspaper once a week.A.publishB.publishesC.has publishedD.is published68.You can take the underground to the new square.You can drive your car there,too.(合并为一句)You can take the underground drive a car to the new square.69.Have a diet with plenty of fruit,vegetables and rice,and you will stay healthier.(保持句意不变)you have a diet with plenty of fruit,vegetables and rice, you will stay healthier.2011浦东新区33.It can't be Betty's bicycle. is a yellow one.A. She'sB. ItsC. HisD. Hers39.With the help of Internet, it's to send an e-mail than a regular letter.A.quickB.more quicklyC.much quickerD.much more quickly44.His successful experience on calculating the distance an interesting topic to discuss.A.raised B, rose C.was raised D,was risen2011黄浦区34.Nowadays people can get on everything by surfing the Internet.A.importanceB.knowledgeC.newsD.idea56.---Sorry for keeping you waiting for me so long.---- .A. Don't mention itB. All rightC. That's OKD. Not at all61.A lot of fish when the lake is polluted. (appear)68.Sandy said," I will see the film with my girlfriend."(改成含有宾语从句的句子)Sandy said that see the film with his girlfriend.70.It's so cold that the children can't play outside.(保持句意不变)It's for the children to play outside.2011闵行区70.Nick asked Mia," Are you excited about going to the beach this weekend?"Nick asked Mia she excited about going to the beach this weekend. 2011卢湾区51.Mum me when I was young. She always made me do things carefully.A.wan angry withB.was careful withC.was strict withD.was satisfied with64.Tom has great in collecting stamps and travelling around the world. (interesting) 2011静安区43.The man was seriously hurt in the accident and he to hospital at once.A.tookB.would takeC.was takenD.would be taken68.The old man has planted many trees since he came to live here.(改为被动语态)Many trees planted by the old man since he came to live here. 2011长宁区33.The reading room in our neighborhood is from 9 a.m. To 9 p.m. on weekdays.A.openB.opensC.openedD.opening48.Louise won the first prize in a maths contest.We were surprised the news.A. WithB.forC.atD.to69.After the earthquake, people have to rebuild many houses.(改为被动句)After the earthquake, many houses have to .2011宝山嘉定区38.Your idea sounds much than his.A. InterestingB.interestedC.more interesting D,more interested49.Liu Xiang is a world-famous sports star. His name is familiar almost everybody in China.A.toB.inC.with D,at52.Could you please tell me if next Saturday?A. Alice will be backB. Alice is backC. Alice would be backD. Alice had been back54.Mike failed in yesterday's test, .A. Either did JohnB. So did JohnC. Neither did JohnD. So John did.55.They formed an English study group last week. The underlined part means" ".anizedB.put upC.startedD.built2011徐汇区42.The company reported that it more than three million iPads by the end of last July.A.soldB.will sellC.has soldD.have sold51.He lives in a wealthy family with a magnificent art , and he is very generous.A.collectionpetitionC.congratulation D,conversation67.When Rose entered the classroom, her classmates were discussing something actively.(句意不变)When Rose the classroom, her classmates were discussing something actively.2011闸北区38.Do you know nearly of our body is water?A.three-quarterB.three quartersC.three fourthD.three fourths46.By the end of 2011, all of China's public art galleries(画廊)free to enter.A.have beenB.had beenC.will beD.would be47.The writer told us that he a great number of short stories in the past few years..A.wroteB.was writtenC.has writtenD.had written52.Dorothy followed the example of her father and went to the university. The underlined part means" ".A. Moved behindB.went afterC.listened carefullyD.copied58.This building was the History Museum of the state. (one)2011金山区51.----Could you tell me for the meeting yesterday?-----Because the traffic was bad.A.why did you come lateB.why you came lateC.why do you come lateD.why you come late53.I don't quite catch what you said at the meeting. The underlined part means .A.missB.hearC.haveD.understand54.The lady goes to see her son in the university from time to time. The underlined part means .A.again and againB.all the timeC.sometimesD.for the time being55.----Would you like me to show you how to work out the math problem?----- .A. Yes. I'd love toB.Why not?C. That's all right.D. It's very kind of you59.'Now that you are 18,you'd better take good care of ."Tom's mother said to her twin sons.(your)61.It's not safe to give out your information to your strange net friends.(person) 2011松江区59.Some boys are playing football there. These uniforms are perhaps .(they)2011青浦区35.Ronaldo(罗纳尔多),the football player, didn't feel , so he had to leave the green field.A.badB.badlyC.goodD.well42.The China Pavilion is wonderful. Thousands if people it by now.A.visitedB.will visitC.have visitD.had visit56.---I don't like Rock Music. It's too noisy.--- .A.That's all rightB.Me too.C.I think so, too.D.So do I.2012杨浦区73.It took my parents two hours to get to Beijing by plane.My parents two hours to Beijing.2012浦东新区36.All the boys came to make fun of Tom, they stayed to play games with him happily at last.A.soB.andC.butD.or43.---Peter hasn't been abroad before. He knows little about western culture.---- .A. So have IB. So do IC. Neither have ID. Neither do I59.I will try best to get a bright future. (I)61. Tim wants to be a great like Zhang Yimou when he grows up. (direct)65.The Bund is famous for its night views. (attract)66.Tom Sawyer gave Ben his brush with worry on his face but in his heart.(enjoy) 73.As we all know, the next Olympic Games will be held in London.(保持句意不变)As we all know, the next Olympic Games will in London.2012徐汇区63.It's hard training not that has helped Liu Xiang break the records again. (lucky) 69.People in western countries rarely talk loudly in public.(反义疑问句)People in western countries rarely talk loudly in public,?2012虹口区42.My uncle will send me some local postcards and stamps after he France.A.reachesB.reachedC.will reachD.is reaching49.---The music is too loud. Could you turn it down, please?---- .A. Sure, what time?B. Sorry, I didn't notice it.C. Well, me too.D. OK, go ahead.50.---Would you like me to take a photo of you in front of the church?---- .A. Yes, please.B. Well done.C. Yes, I would.D. With pleasure.60.To be or not to be, it's a very difficult to many people as well as Hamlet. (choose)2012闵行区31.Ben studied the menu for while and then ordered his meal.A.aB.anC.theD./46.Sonia never cleans even offers to wash the dishes. How lazy he is!A.butB.andC.soD.or2012黄浦区46.Nobody knows player will win the game until the last moment.A.whichB.whenC.howD.where60.Most Chinese people think that 8 is a number.(luck)61.This kind of grass is used to deal with toothache in that area.(wide)68. It takes about three days to get to the moon by spaceship.(对划线部分提问)does it take to get to the moon by spaceship?2012松江区41.The firemen can't go into the room because the door by someone.A.locksB.was lockedC.has lockedD.locked47.The father said nothing but looked at his son's school report.A.angerB.angrierC.angrilyD.more angry2011虹口区34.To our surprise, the T-shirts on the group of models are made newspaper.A.ofB.byC.inD.with41.Nothing can be done our captain gives an order and we have to wait right now.A.becauseB.asC.afterD.unless49.When they first came to China, none of them could a word of Chinese.A.sayB.speakC.tellD.talk55.,-----Oh, it's snowing outside,but I have to go to work right now.------ .A.Good ideaB.Never mindC.Take care!D.Well done!68.Arthur got money to pay for the bike by delivering newspapers every day.(对划线部分提问)Arthur get money to pay for the bike?模拟试卷(二)33.At the moment, he about the future.A.prefers to thinkingB.prefers to thinkst year Tom the first prize in the English contest.A.awardedB.was awardedC.would awardD.was awarding46.Metal make machines and many other things.ed toB.is used forC.is used asD.is used to。

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