2017年上海市徐汇区中考二模试卷(含答案)
2017年上海市徐汇区中考二模试卷(含答案)
2016学年第二学期徐汇区初三模拟考英语试卷2017.4Part 2 Phonetics, Vocabulary and Grammar(第二部分语音、词汇和语法)II. Choose the best answer(选择最恰当的答案):(共20分)26.Which of the following words matches the sound /nju:/?A. nowB. norC. newD. near27. Brooklyn Beckham, ______ eldest child of the Beckhams, will sell his photo book in May, 2017.A. aB. anC. theD. /28. Nobody can stop a person with a strong will _______ realizing his dreams.A. ofB. fromC. withD. by29. If they don’t prepare _______ well for the interview, they may fail to get the offer.A. theyB. themC. theirsD. themselves30. When Frank complained about the cold winter, Jane ________ the sunny summer days in Australia.A. enjoysB. was enjoyingC. has enjoyedD. will enjoy31. Joe can only take two of his family members into the studio and leave ______ waiting outside.A. the othersB. othersC. otherD. the other32. _______ the end of yesterday, there had been more than 10 car accidents because of the typhoon.A. ByB. FromC.AtD. To33. The old ______ enjoy the convenience of technologies because they don’t accept new things qui ckly.A. mustn’tB. needn’tC. can’tD. shouldn’t34. The panda _____ to get used to the new environment since he returned from America.A. learnsB. is learningC. learnedD. has learnt35. The audience were attracted by ________ the stories and the reading at the new program “Readers”.A. bothB. neitherC. eitherD. none36. After the operation on Grandma’s heart, she becomes much ______ at present.A. goodB. wellC. betterD. best37. Every picture in the coloring book Secret Garden was not drawn by computer ______ all by hand.A. andB. soC. butD. or38. The year’s best picture was wrongly awarded to La La Land, which ______ never ______ before.A. would…happenB. was…happeningC. has…happenedD. had…happened39. A:________can we get the chance to join the party?B:To join this party, you have to dress up like a Superhero.A. WhyB. WhatC. HowD. Where40. Jenny is an independent girl and she is considering ______ a boarding school(寄宿学校).A. enterB. enteringC. to enterD. entered41. Every Monday morning all the staff members have a meeting to report their recent work, _____?A. haven’t theyB. don’t theyC. aren’t theyD. won’t they42. Alex had no interest in painting _______ he met a creative and patient art teacher one day.A. whenB. becauseC. untilD. if43. _______ good chance those teenagers were given to experience different cultures!A. HowB. WhatC. What aD. What an44. A:The dishes you cooked tonight are really delicious.B:__________A. Of course!B. I’m glad you like them !C. That’s all right!D. Never mind!45. A:Excuse me, can I ask you some questions about the changes in Shanghai?B:_________A. Sure, go ahead!B. Congratulations!C. I’m so sorry!D. Nice to meet you!Ⅲ.Complete the following passage with the words or phrases in the box. Each can only be used once(将下列单词或词组填入空格。
上海市徐汇区2017年中考数学二模试卷(含解析)
2017年上海市徐汇区中考数学二模试卷一、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】1.如果数轴上表示2和﹣4的两点分别是点A和点B,那么点A和点B之间的距离是()A.﹣2 B.2 C.﹣6 D.6.2.已知点M(1﹣2m,m﹣1)在第四象限内,那么m的取值范围是()A.m>1 B.m<C.<m<1 D.m<或m>13.如图,AB∥CD,BE平分∠ABC,∠C=36°,那么∠ABE的大小是()A.18° B.24° C.36° D.54°.4.已知直线y=ax+b(a≠0)经过点A(﹣3,0)和点B(0,2),那么关于x的方程ax+b=0的解是()A.x=﹣3 B.x=﹣1 C.x=0 D.x=25.某校开展“阅读季”活动,小明调查了班级里40名同学计划购书的花费情况,并将结果绘制成如图所示的条形统计图,根据图中相关信息,这次调查获取的样本数据的众数和中位数分别是()A.12和10 B.30和50 C.10和12 D.50和30.6.如图,在△ABC中,AC=BC,点D、E分别是边AB、AC的中点,延长DE到F,使得EF=DE,那么四边形ADCF是()A.等腰梯形 B.直角梯形 C.矩形 D.菱形二、填空题(本大题共12题,每题4分,满分48分)7.人体中成熟的红细胞的平均直径为0.0000077m,0.0000077用科学记数法表示为.8.方程=的解是.9.如果反比例函数y=(k≠0)的图象经过点P(﹣1,4),那么k的范围是.10.如果关于x的方程x2+3x﹣k=0有两个不相等的实数根,那么k的取值范围是.11.将抛物线y=x2﹣2x+1向上平移2个单位后,所得抛物线的顶点坐标是.12.在实数,π,3°,tan60°,2中,随机抽取一个数,抽得的数大于2的概率是.13.甲,乙,丙,丁四名跳高运动员赛前几次选拔赛成绩如表所示,根据表中的信息,如果要从中,选择一名成绩好又发挥稳定的运动员参加比赛,那么应选.14.如果t是方程x2﹣2x﹣1=0的根,那么代数式2t2﹣4t的值是.15.如图,四边形DEFG是△ABC的内接矩形,其中D、G分别在边AB,AC上,点E、F在边BC上,DG=2DE,AH是△ABC的高,BC=20,AH=15,那么矩形DEFG的周长是.16.如图,在平行四边形ABCD中,AE⊥CD,垂足为E,AF⊥BC,垂足为F,AD=4,BF=3,∠EAF=60°,设=,如果向量=k(k≠0),那么k的值是.17.如图,在△ABC中,AD平分∠BAC交边BC于点D,BD=AD,AB=3,AC=2,那么AD的长是.18.如图,在△ABC中,∠ACB=α(90°<α<180°),将△ABC绕着点A逆时针旋转2β(0°<β<90°)后得△AED,其中点E、D分别和点B、C对应,联结CD,如果CD⊥ED,请写出一个关于α与β的等量关系的式子.三、(本大题共7题,第19-22题每题10分;第23、24每题12分;第25题14分;满分78分)19.先化简,再求值:÷﹣(其中a=)20.解方程组:.21.某足球特色学校在商场购买甲、乙两种品牌的足球.已知乙种足球比甲种足球每只贵20元,该校分别花费2000元、1400元购买甲、乙两种足球,这样购得甲种足球的数量是购得乙种足球数量的2倍,求甲、乙两种足球的单价各是多少元?22.如图,已知梯形ABCD中,ADǁBC,AC、BD相交于点O,AB⊥AC,AD=CD,AB=3,BC=5.求:(1)tan∠ACD的值;(2)梯形ABCD的面积.23.如图1,在Rt△ABC中,∠ACB=90°,点D是边AB的中点,点E在边BC上,AE=BE,点M是AE 的中点,联结CM,点G在线段CM上,作∠GDN=∠AEB交边BC于N.(1)如图2,当点G和点M重合时,求证:四边形DMEN是菱形;(2)如图1,当点G和点M、C不重合时,求证:DG=DN.24.如图,已知抛物线y=ax2+4(a≠0)与x轴交于点A和点B(2,0),与y轴交于点C,点D是抛物线在第一象限的点.(1)当△ABD的面积为4时,①求点D的坐标;②联结OD,点M是抛物线上的点,且∠MDO=∠BOD,求点M的坐标;(2)直线BD、AD分别与y轴交于点E、F,那么OE+OF的值是否变化,请说明理由.25.如图,已知△ABC中,AB=AC=5,BC=6,点O是边BC上的动点,以点O为圆心,OB为半径作圆O,交AB边于点D,过点D作∠ODP=∠B,交边AC于点P,交圆O与点E.设OB=x.(1)当点P与点C重合时,求PD的长;(2)设AP﹣EP=y,求y关于x的解析式及定义域;(3)联结OP,当OP⊥OD时,试判断以点P为圆心,PC为半径的圆P与圆O的位置关系.2017年上海市徐汇区中考数学二模试卷参考答案与试题解析一、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】1.如果数轴上表示2和﹣4的两点分别是点A和点B,那么点A和点B之间的距离是()A.﹣2 B.2 C.﹣6 D.6.【考点】13:数轴.【分析】本题可以采用两种方法:(1)在数轴上直接数出表示﹣4和表示2的两点之间的距离.(2)用较大的数减去较小的数.【解答】解:根据较大的数减去较小的数得:2﹣(﹣4)=6,故选D.【点评】本题考查了数轴,掌握数轴上两点间的距离的计算方法是解题的关键.2.已知点M(1﹣2m,m﹣1)在第四象限内,那么m的取值范围是()A.m>1 B.m<C.<m<1 D.m<或m>1【考点】CB:解一元一次不等式组;D1:点的坐标.【分析】根据坐标系内点的横纵坐标符号特点列出关于m的不等式组求解可得.【解答】解:根据题意,可得:,解不等式①,得:m<,解不等式②,得:m<1,∴m<,故选:B.【点评】本题考查的是解一元一次不等式组,正确求出每一个不等式解集是基础,熟知“同大取大;同小取小;大小小大中间找;大大小小找不到”的原则是解答此题的关键.3.如图,AB∥CD,BE平分∠ABC,∠C=36°,那么∠ABE的大小是()A.18° B.24° C.36° D.54°.【考点】JA:平行线的性质;IJ:角平分线的定义.【分析】先根据平行线的性质,得出∠ABC=36°,再根据BE平分∠ABC,即可得出∠ABE=∠ABC.【解答】解:∵AB∥CD,∠C=36°,∴∠ABC=36°,又∵BE平分∠ABC,∴∠ABE=∠ABC=18°,故选:A.【点评】本题主要考查了平行线的性质,解题时注意:两直线平行,内错角相等.4.已知直线y=ax+b(a≠0)经过点A(﹣3,0)和点B(0,2),那么关于x的方程ax+b=0的解是()A.x=﹣3 B.x=﹣1 C.x=0 D.x=2【考点】FC:一次函数与一元一次方程.【分析】直线y=ax+b与x轴交点的横坐标的值即为关于x的方程ax+b=0的解.【解答】解:∵直线y=ax+b(a≠0)经过点A(﹣3,0),∴关于x的方程ax+b=0的解是x=﹣3.故选A.【点评】本题本题主要考查了一次函数与一元一次方程的关系.任何一元一次方程都可以转化为ax+b=0 (a,b为常数,a≠0)的形式,所以解一元一次方程可以转化为:当某个一次函数的值为0时,求相应的自变量的值.从图象上看,相当于已知直线y=ax+b确定它与x轴的交点的横坐标的值.5.某校开展“阅读季”活动,小明调查了班级里40名同学计划购书的花费情况,并将结果绘制成如图所示的条形统计图,根据图中相关信息,这次调查获取的样本数据的众数和中位数分别是()A.12和10 B.30和50 C.10和12 D.50和30.【考点】VC:条形统计图;W4:中位数;W5:众数.【分析】众数就是出现次数最多的数,据此即可判断,中位数就是大小处于中间位置的数,根据定义判断.【解答】解:这组数据中30元出现次数最多,故众数是:30元;40个数据中位数是第20个数据50元与第21个数据50元的平均数,故中位数是:50元.故选B.【点评】本题考查的是条形统计图和扇形统计图的综合运用,读懂统计图,从不同的统计图中得到必要的信息是解决问题的关键.条形统计图能清楚地表示出每个项目的数据.6.如图,在△ABC中,AC=BC,点D、E分别是边AB、AC的中点,延长DE到F,使得EF=DE,那么四边形ADCF是()A.等腰梯形 B.直角梯形 C.矩形 D.菱形【考点】LI:直角梯形;L9:菱形的判定;LC:矩形的判定.【分析】先证明四边形ADCF是平行四边形,再证明AC=DF即可.【解答】解:∵E是AC中点,∴AE=EC,∵DE=EF,∴四边形ADCF是平行四边形,∵AD=DB,AE=EC,∴DE=BC,∴DF=BC,∵CA=CB,∴AC=DF,∴四边形ADCF是矩形;故选:C.【点评】本题考查了矩形的判定、等腰三角形的性质、平行四边形的判定、三角形中位线定理;熟记对角线相等的平行四边形是矩形是解决问题的关键.二、填空题(本大题共12题,每题4分,满分48分)7.人体中成熟的红细胞的平均直径为0.0000077m,0.0000077用科学记数法表示为7.7×10﹣6.【考点】1J:科学记数法—表示较小的数.【分析】绝对值小于1的正数也可以利用科学记数法表示,一般形式为a×10﹣n,与较大数的科学记数法不同的是其所使用的是负指数幂,指数由原数左边起第一个不为零的数字前面的0的个数所决定.【解答】解:0.0000077=7.7×10﹣6,故答案为:7.7×10﹣6.【点评】本题考查用科学记数法表示较小的数,一般形式为a×10﹣n,其中1≤|a|<10,n为由原数左边起第一个不为零的数字前面的0的个数所决定.8.方程=的解是x1=2,x2=﹣1 .【考点】AG:无理方程.【分析】将方程两边平方整理得到关于x的一元二次方程,然后求解即可.【解答】解:方程两边平方得,x2﹣x=2,整理得,x2﹣x﹣2=0,解得x1=2,x2=﹣1,经检验,x1=2,x2=﹣1都是原方程的根,所以,方程的解是x1=2,x2=﹣1.故答案为:x1=2,x2=﹣1.【点评】本题主要考查解无理方程的知识点,去掉根号把无理式化成有理方程是解题的关键,注意观察方程的结构特点,把无理方程转化成一元二次方程的形式进行解答,需要同学们仔细掌握.9.如果反比例函数y=(k≠0)的图象经过点P(﹣1,4),那么k的范围是﹣4 .【考点】G6:反比例函数图象上点的坐标特征.【分析】直接把点P(﹣1,4)代入反比例函数y=(k≠0),求出k的值即可.【解答】解:∵反比例函数y=(k≠0)的图象经过点P(﹣1,4),∴4=,解得k=﹣4.故答案为:﹣4.【点评】本题考查的是反比例函数图象上点的坐标特点,熟知反比例函数图象上各点的坐标一定适合此函数的解析式是解答此题的关键.10.如果关于x的方程x2+3x﹣k=0有两个不相等的实数根,那么k的取值范围是k>﹣.【考点】AA:根的判别式.【专题】11 :计算题.【分析】利用判别式的意义得到△=32﹣4(﹣k)>0,然后解不等式即可.【解答】解:根据题意得△=32﹣4(﹣k)>0,解得k>﹣.故答案为k>﹣.【点评】本题考查了根的判别式:一元二次方程ax2+bx+c=0(a≠0)的根与△=b2﹣4ac有如下关系:当△>0时,方程有两个不相等的两个实数根;当△=0时,方程有两个相等的两个实数根;当△<0时,方程无实数根.11.将抛物线y=x2﹣2x+1向上平移2个单位后,所得抛物线的顶点坐标是(1,2).【考点】H6:二次函数图象与几何变换.【分析】根据配方法先化为顶点式,再根据上加下减左加右减的原则得出解析式,最后确定顶点坐标即可.【解答】解:y=x2﹣2x+1=(x﹣1)2,平移后的解析式为y=(x﹣1)2+2,∴顶点的坐标为(1,2),故答案为(1,2).【点评】本题考查了二次函数的图象与几何变换,掌握用配方法把一般式化为顶点式以及顶点坐标的求法是解题的关键.12.在实数,π,3°,tan60°,2中,随机抽取一个数,抽得的数大于2的概率是.【考点】X4:概率公式.【分析】先找出大于2的数,再根据概率公式即可得出答案.【解答】解:在实数,π,3°,tan60°,2中,大于2的数有,π,则抽得的数大于2的概率是;故答案为:.【点评】本题考查了概率的知识.用到的知识点为:概率=所求情况数与总情况数之比.13.甲,乙,丙,丁四名跳高运动员赛前几次选拔赛成绩如表所示,根据表中的信息,如果要从中,选择一名成绩好又发挥稳定的运动员参加比赛,那么应选甲.【考点】W7:方差;W2:加权平均数.【分析】先确定平均数较大的运动员,再选出方差较小的运动员.【解答】解:因为甲的平均数较大,且甲的方差较小,比较稳定,所以选择甲参加比赛.故答案为:甲.【点评】本题考查了方差:方差是反映一组数据的波动大小的一个量.方差越大,则平均值的离散程度越大,稳定性也越小;反之,则它与其平均值的离散程度越小,稳定性越好14.如果t是方程x2﹣2x﹣1=0的根,那么代数式2t2﹣4t的值是 2 .【考点】A3:一元二次方程的解.【专题】11 :计算题.【分析】根据一元二次方程的解的定义得到t2﹣2t﹣1=0,则t2﹣2t=1,然后利用整体代入的方法计算代数式2t2﹣4t的值.【解答】解:当x=t时,t2﹣2t﹣1=0,则t2﹣2t=1,所以2t2﹣4t=2(t2﹣2t)=2.故答案为2.【点评】本题考查了一元二次方程的解:能使一元二次方程左右两边相等的未知数的值是一元二次方程的解.15.如图,四边形DEFG是△ABC的内接矩形,其中D、G分别在边AB,AC上,点E、F在边BC上,DG=2DE,AH是△ABC的高,BC=20,AH=15,那么矩形DEFG的周长是36 .【考点】S9:相似三角形的判定与性质;LB:矩形的性质.【分析】根据相似三角形的判定和性质结论得到结论.【解答】解:∵DG∥BC,AH⊥BC,∴AH⊥DG,△ADG∽△ABC,∴,即,∴DE=6,∴DG=2DE=12,∴矩形DEFG的周长=2×(6+12)=36.故答案为:36.【点评】本题考查了相似三角形的判定和性质,矩形的性质,熟练掌握相似三角形的判定和性质是解题的关键.16.如图,在平行四边形ABCD中,AE⊥CD,垂足为E,AF⊥BC,垂足为F,AD=4,BF=3,∠EAF=60°,设=,如果向量=k(k≠0),那么k的值是﹣.【考点】LM:*平面向量;L5:平行四边形的性质.【分析】根据AE⊥CD、AF⊥BC及∠EAF=60°可得∠C=120°,由平行四边形得出∠B=∠D=60°、AB∥CD且AB=CD,利用三角函数求得DE=2、AB=6,CE=4,最后可得==﹣=﹣.【解答】解:∵AE⊥CD、AF⊥BC,∴∠AEC=∠AFC=90°,∵∠EAF=60°,∴∠C=360°﹣∠AEC﹣∠AFC=120°,∵四边形ABCD是平行四边形,∴∠B=∠D=60°,∴DE=ADcosD=4×=2,AB===6,则CE=CD﹣DE=AB﹣DE=6﹣2=4,∵AB∥CD,且AB=CD,∴==﹣=﹣=﹣,故答案为:﹣.【点评】本题主要考查四边形内角和、平行四边形的性质、三角函数的应用及平面向量的计算,熟练掌握平行四边形的性质是解题的关键.17.如图,在△ABC中,AD平分∠BAC交边BC于点D,BD=AD,AB=3,AC=2,那么AD的长是.【考点】S9:相似三角形的判定与性质.【分析】根据题意得到△ACD∽△BCA,然后根据题目中的数据即可求得AD的长.【解答】解:∵在△ABC中,AD平分∠BAC交边BC于点D,BD=AD,∴∠BAD=∠CAD,∠BAD=∠ABD,∴∠ABC=∠CAD,又∵∠ACD=∠BCA,∴△ACD∽△BCA,∴,∵BD=AD,AB=3,AC=2,∴,解得,AD=,CD=,故答案为:.【点评】本题考查相似三角形的判定与性质,解答本题的关键是明确题意,找出三角形相似的条件.18.如图,在△ABC中,∠ACB=α(90°<α<180°),将△ABC绕着点A逆时针旋转2β(0°<β<90°)后得△AED,其中点E、D分别和点B、C对应,联结CD,如果CD⊥ED,请写出一个关于α与β的等量关系的式子α+β=180°.【考点】R2:旋转的性质;K7:三角形内角和定理;KH:等腰三角形的性质.【分析】先过A作AF⊥CD,根据旋转的性质,得出∠ADE=∠ACB=α,AC=AD,∠CAD=2β,再根据等腰三角形的性质,即可得到Rt△ADF中,∠DAF+∠ADF=β+α﹣90°=90°,据此可得α与β的等量关系.【解答】解:如图,过A作AF⊥CD,由旋转可得,∠ADE=∠ACB=α,∵CD⊥DE,∴∠ADC=α﹣90°,由旋转可得,AC=AD,∠CAD=2β,∴∠DAF=β,∴Rt△ADF中,∠DAF+∠ADF=90°,即β+α﹣90°=90°,∴α+β=180°.故答案为:α+β=180°.【点评】本题主要考查了旋转的性质,三角形内角和定理以及等腰三角形的性质的综合应用,解决问题的关键是作辅助线构造直角三角形,依据等腰三角形三线合一的性质进行计算.三、(本大题共7题,第19-22题每题10分;第23、24每题12分;第25题14分;满分78分)19.先化简,再求值:÷﹣(其中a=)【考点】6D:分式的化简求值.【分析】先算除法,再算减法,最后把a的值代入进行计算即可.【解答】解:原式=•﹣=(a﹣1)﹣3=a﹣1﹣3=a﹣4.当a=时,原式=﹣4=﹣3.【点评】本题考查的是分式的化简求值,此类题型的特点是:利用方程解的定义找到相等关系,再把所求的代数式化简后整理出所找到的相等关系的形式,再把此相等关系整体代入所求代数式,即可求出代数式的值.20.解方程组:.【考点】AF:高次方程.【分析】由②得出(2x﹣3y)2=16,求出2x﹣3y=±4,把原方程组转化成两个二元一次方程组,求出方程组的解即可.【解答】解:由②得:(2x﹣3y)2=16,2x﹣3y=±4,即原方程组化为和,解得:,,即原方程组的解为:,.【点评】本题考查了解高次方程组,能把高次方程组转化成二元一次方程组是解此题的关键.21.某足球特色学校在商场购买甲、乙两种品牌的足球.已知乙种足球比甲种足球每只贵20元,该校分别花费2000元、1400元购买甲、乙两种足球,这样购得甲种足球的数量是购得乙种足球数量的2倍,求甲、乙两种足球的单价各是多少元?【考点】B7:分式方程的应用.【分析】设购买一个甲品牌的足球需x元,则购买一个乙品牌的足球需(x+20)元,根据购买甲种足球数量是购买乙种足球数量的2倍列出方程解答即可.【解答】解:(1)设购买一个甲种足球需要x元,=×2,解得,x=50,经检验,x=50是原分式方程的解,所以x+20=70(元),答:购买一个甲种足球需50元,一个乙种足球需70元.【点评】本题考查分式方程的应用,关键是根据数量作为等量关系列出方程.22.如图,已知梯形ABCD中,ADǁBC,AC、BD相交于点O,AB⊥AC,AD=CD,AB=3,BC=5.求:(1)tan∠ACD的值;(2)梯形ABCD的面积.【考点】LH:梯形;T7:解直角三角形.【分析】(1)作DE∥AB交BC于E,交AC于M,证出DE⊥AC,由等腰三角形的性质得出AM=CM,证明四边形ABED是平行四边形,得出DE=AB=3,在Rt△ABC中,由勾股定理求出AC=4,得出AM=CM=2,由平行线分线段成比例定理得出DM=EM=DE=,即可求出tan∠ACD==;(2)梯形ABCD的面积=△ABC的面积+△ACD的面积,即可得出答案.【解答】解:(1)作DE∥AB交BC于E,交AC于M,如图所示:∵AB⊥AC,DE∥AB,∴DE⊥AC,∵AD=CD,∴AM=CM,∵AD∥BC,DE∥AB,∴四边形ABED是平行四边形,∴DE=AB=3,在Rt△ABC中,AC===4,∴AM=CM=2,∵AD∥BC,∴DM:EM=AM:CM=1:1,∴DM=EM=DE=,∴tan∠ACD===;(2)梯形ABCD的面积=△ABC的面积+△ACD的面积=×3×4+×4×=9.【点评】本题考查了梯形的性质、等腰三角形的性质、勾股定理、平行线的性质、平行线分线段成比例定理、梯形和三角形面积的计算等知识;本题综合性强,有一定难度.23.如图1,在Rt△ABC中,∠ACB=90°,点D是边AB的中点,点E在边BC上,AE=BE,点M是AE 的中点,联结CM,点G在线段CM上,作∠GDN=∠AEB交边BC于N.(1)如图2,当点G和点M重合时,求证:四边形DMEN是菱形;(2)如图1,当点G和点M、C不重合时,求证:DG=DN.【考点】LA:菱形的判定与性质.【分析】(1)如图2中,首先证明四边形DMEN是平行四边形,再证明ME=MD即可证明.(2)如图1中,取BE的中点F,连接DM、DF.只要证明△DMG≌△DFN即可.【解答】证明:(1)如图2中,∵AM=ME.AD=DB,∴DM∥BE,∴∠GDN+∠DNE=180°,∵∠GDN=∠AEB,∴∠AEB+∠DNE=180°,∴AE∥DN,∴四边形DMEN是平行四边形,∵DM=BE,EM=AE,AE=BE,∴DM=EM,∴四边形DMEN是菱形.(2)如图1中,取BE的中点F,连接DM、DF.由(1)可知四边形EMDF是菱形,∴∠AEB=∠MDF,DM=DF,∴∠GDN=∠AEB,∴∠MDF=∠GDN,∴∠MDG=∠FDN,∵∠DFN=∠AEB=∠MCE,∠GMD=∠EMD+∠CME,、在Rt△ACE中,∵AM=ME,∴CM=ME,∴∠MCE=∠CEM=∠EMD,∴∠DMG=∠DFN,∴△DMG≌△DFN,∴DG=DN.【点评】本题考查菱形的判定和性质、全等三角形的判定和性质、直角三角形斜边中线定理等知识,解题的关键是学会添加常用辅助线,构造全等三角形解决问题,属于中考常考题型.24.如图,已知抛物线y=ax2+4(a≠0)与x轴交于点A和点B(2,0),与y轴交于点C,点D是抛物线在第一象限的点.(1)当△ABD的面积为4时,①求点D的坐标;②联结OD,点M是抛物线上的点,且∠MDO=∠BOD,求点M的坐标;(2)直线BD、AD分别与y轴交于点E、F,那么OE+OF的值是否变化,请说明理由.【考点】HF:二次函数综合题.【分析】(1)先确定出抛物线解析式,①设出点D坐标,用三角形ABD的面积建立方程即可得出点D坐标;②分点M在OD上方,利用内错角相等,两直线平行,即可得出点M的纵坐标,即可得出M的坐标,带你M在OD下方时,求出直线DG的解析式,和抛物线解析式联立求出直线和抛物线的交点即可判断不存在;(2)设出点D的坐标,利用平行线分线段成比例定理表示出OE,OF求和即可得出结论.【解答】解:(1)∵抛物线y=ax2+4(a≠0)与x轴交于点A和点B(2,0),∴A(﹣2,0),4a+4=0,∴a=﹣1,AB=4,∴抛物线的解析式为y=﹣x2+4,①设D(m,﹣m2+4),∵△ABD的面积为4,∴4=×4(﹣m2+4)∴m=±,∵点D在第一象限,∴m=,∴D(,2),②如图1,点M在OD上方时,∵∠MDO=∠BOD,∴DM∥AB,∴M(﹣,2),当M在OD下方时,设DM交x轴于G,设G(n,0),∴OG=n,∵D(,2),∴DG=,∵∠MDO=∠BOD,∴OG=DG,∴,∴n=,∴G(,0),∵D(,2),∴直线DG的解析式为y=﹣2x+6①,∵抛物线的解析式为y=﹣x2+4②,联立①②得,x=,y=2,此时交点刚好是D点,所以在OD下方不存在点M.(2)OE+OF的值不发生变化,理由:如图2,过点D作DH⊥AB于H,∴OF∥DH,∴,设D(b,﹣b2+4),∴AH=b+2,DH=﹣b2+4,∵OA=2,∴,∴OF=,同理:OE=2(2+b),∴OE+OF=2(2﹣b)+2(2+b)=8.【点评】此题是二次函数综合题,主要考查了待定系数法,平行线的判定,平行线分线段成比例定理,解(1)的关键是求出抛物线解析式,难点是分情况求出点M的坐标,解(2)的关键是作出辅助线.25.如图,已知△ABC中,AB=AC=5,BC=6,点O是边BC上的动点,以点O为圆心,OB为半径作圆O,交AB边于点D,过点D作∠ODP=∠B,交边AC于点P,交圆O与点E.设OB=x.(1)当点P与点C重合时,求PD的长;(2)设AP﹣EP=y,求y关于x的解析式及定义域;(3)联结OP,当OP⊥OD时,试判断以点P为圆心,PC为半径的圆P与圆O的位置关系.【考点】MR:圆的综合题.【分析】(1)如图1中,首先求出cos∠B,cos∠A,如图2中,当点P与C重合时,只要证明PA=PD 即可;(2)如图2中,作CG⊥AB于G,OH⊥BD于H.分两种情形①当≤x≤时,如图4中.②当<x<时,如图5中,作PG⊥AB于G.(3)如图6中,连接OP.根据cos∠C=cos∠B==,列出方程,求出两圆的半径,圆心距即可判断.【解答】解:(1)如图1中,作AH⊥BC于H,CG⊥AB于G,∵AB=AC=5,AH⊥BC,∴BH=CH=3,AH=4,∵•BC•AH=•AB•CG,∴CG=,AG==,∴cos∠B=,cos∠BAC=,如图2中,当点P与C重合时,∵OB=OD,∴∠B=∠ODB=∠ACB,∵∠ADO=∠B+∠BOD=∠CDO+∠ADP,∠ODP=∠B,∴∠ADP=∠BOD=∠BAC,∴PA=PD=5;(2)如图2中,作CG⊥AB于G,OH⊥BD于H.∵AD=2AG=,∵BD=2BH=2OB•cos∠B=x,∴x+=5,∴x=,如图3中,当P、E重合时,作EG⊥AD于G.根据对称性可知,B、E关于直线OD对称,∴DB=DE=AE=x,∵cos∠A==,∴=,解得x=,当点D与A重合时x=5,∴x=,当≤x≤时,如图4中,∵y=PA﹣PE=PD﹣PE=DE=BD=x,∴y=x,当<x<时,如图5中,作PG⊥AB于G.∵BD=DE=x,DG=AG=(5﹣x),∴AP=AG÷cos∠A=(5﹣x),∴y=AP﹣EP=(5﹣x)﹣[x﹣(5﹣x)]=﹣x+,综上所述,y=.(3)如图6中,连接OP.连接OP,∵OP⊥AC,∴cos∠C=cos∠B==,∴=,∴x=,PC=,OP=,∵<+,∴以点P为圆心,PC为半径的圆P与圆O的位置关系是相交.【点评】本题考查圆综合题、锐角三角函数、等腰三角形的判定和性质等知识,解题的关键是寻找特殊点解决问题,学会构建方程的解决问题,学会用分类讨论的思想思考问题,属于中考压轴题.。
2017年上海市徐汇区中考物理、化学二模试卷及答案
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7.当烛焰离凸透镜 4 厘米时,在凸透镜另一侧的光屏上成一个倒立、放大的实像.该凸透 镜的焦距可能为( A.1 厘米 ) C.4 厘米 D.5 厘米
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三、作图题(共 7 分) 16.在图中根据给出的入射光线 AO 画出反射光线 OB,并标出反射角及其度数.
17.在图中,分别画出杠杆的动力臂 l1 和阻力臂 l2.
18.在图中根据通电螺线管的 N 极,标出磁感线方向、小磁针的 N 极以及电源正、负极.
四、计算题(共 25 分) 19.质量为 1 千克的水温度升高了 20℃,求吸收的热量 Q 吸.[c 水=4.2×103 焦/ (千克•℃)]. 20.如图所示,用力 F 匀速提起重为 20 牛的物体 A,不计摩擦.若物体 A 在 10 秒内上升 4 米,求此过程中拉力 F 做的功和功率.
15.小徐同学暑假要去兰州旅游,他上网查找了上海和兰州两地 2016 年 6 月 20 日到 6 月 22 日三日气温的最高值和最低值.从表中可以看出:上海的昼夜温差比兰州的昼夜温 差 .小徐查看地图知道,上海属沿海城市,兰州属内陆城市.根据相关信息分析两地昼 . 上海 6 月 20 日 最高温度 最低温度 6 月 21 日 最高温度 最低温度 6 月 22 日 最高温度 最低温度 29℃ 22℃ 29℃ 22℃ 29℃ 23℃ 兰州 27℃ 16℃ 28℃ 16℃ 27℃ 17℃
2.四冲程内燃机工作时,将机械能转化成内能的冲程是( A.吸气冲程 B.压缩冲程 C.做功冲程 D.排气冲程 【考点】GM:内燃机的四个冲程.
徐汇区2017中考英语二模
2016-2017学年第二学期徐汇区初三模拟考英语试卷2017.4(满分150分,考试时间100分钟)Part 1 Listening (第一部分听力)I. Listening Comprehension (听力理解): (共30分)A. Listen and choose the right picture (根据你听到的内容,选出相应的图片): (共6分)A B C DE F G H1. ______2. ______3. ______4. ______5. ______6. ______B. Listen to the dialogue and choose the best answer to the question you hear (根据你听到的对话和问题,选出最恰当的答案): (共8分)7. A) On the 1st floor. B) On the 3rd floor. C) On the 6th floor. D) On the 8th floor.8. A) At the airport. B) At the bus stop. C) At the train station. D) At the subway station.9. A) On foot. B) By taxi. C) By bike. D) By bus.10. A) Buying some cold drinks. B) Cleaning his room.C) Having a barbecue. D) Meeting Jenny.11. A) On Thursday. B) On Friday. C) On Saturday. D) On Sunday.12. A) The orange one. B) The pink one. C) The blue one. D) The green one.13. A) By using some magic. B) By taking a yoga course.C) By going on a diet. D) By calling himself Tim.14. A) Because they didn’t recognize her. B) Because they met a famous actress.C) Because the woman performed well. D) Because the play made them happy.C. Listen to the letter and tell whether the following statements are true or false (判断下列句子是否符合你听到的内容, 符合的用“A”表示,不符合的用“B”表示): (共6分)15. It was a letter to Daisy about Jason’s first day at his new school.16. Jason was excited because there are many students in the new school.17. Jason’s class teacher is Mrs. Black and she is a young and friendly lady.18. Jason has made friends with a nice boy from Hong Kong.19. Everyone in the school must learn Spanish as a second language.20. Jason has to do much maths homework on the Internet on the first day.D. Listen to the passage and complete the following sentences (听短文,完成下列内容。
2017上海市徐汇区中考英语二模试题
2017学年徐汇区初三模拟考英语试卷2017.4(满分150分,考试时间100分钟)Part 1 Listening (第一部分听力)I. Listening Comprehension (听力理解): (共30分)A. Listen and choose the right picture (根据你听到的内容,选出相应的图片): (共6分)A B C DE F G H1. ______2. ______3. ______4. ______5. ______6. ______B. Listen to the dialogue and choose the best answer to the question you hear (根据你听到的对话和问题,选出最恰当的答案): (共8分)7. A) On the 1st floor. B) On the 3rd floor. C) On the 6th floor. D) On the 8th floor.8. A) At the airport. B) At the bus stop. C) At the train station. D) At the subway station.9. A) On foot. B) By taxi. C) By bike. D) By bus.10. A) Buying some cold drinks. B) Cleaning his room.C) Having a barbecue. D) Meeting Jenny.11. A) On Thursday. B) On Friday. C) On Saturday. D) On Sunday.12. A) The orange one. B) The pink one. C) The blue one. D) The greenone.13. A) By using some magic. B) By taking a yoga course.C) By going on a diet. D) By calling himself Tim.14. A) Because they didn’t recognize her. B) Because they met a famous actress.C) Because the woman performed well. D) Because the play made them happy.C. Listen to the letter and tell whether the following statements are true or false (判断下列句子是否符合你听到的内容, 符合的用“A”表示,不符合的用“B”表示): (共6分)15. It was a letter to Daisy about Jason’s first day at his new school.16. Jason was excited because there are many students in the newschool.17. Jason’s class teacher is Mrs. Black and she is a young andfriendly lady.18. Jason has made friends with a nice boy from Hong Kong.19. Everyone in the school must learn Spanish as a second language.20. Jason has to do much maths homework on the Internet on the first day.D. Listen to the passage and complete the following sentences (听短文,完成下列内容。
2017年上海市徐汇区初三中考二模语文试题及答案
2017徐汇二模一、文言文阅读(39分)(一)默写(15分)1.造化钟神秀,____________________。
(《望岳》)2.________________,五十弦翻塞外声。
(《破阵子·为陈同甫赋壮词以寄》)3.东边日出西边雨,________________。
(《竹枝词》)4.__________________,轻烟老树寒鸦。
(《天净沙·秋》)5.不以物喜,____________________。
(《岳阳楼记》)(二)阅读下面两首诗,完成第6-7题(4份)①题破山寺后禅院②山居秋暝【唐】常建【唐】王维清晨入古寺,初日照高林。
空山新雨后,天气晚来秋。
竹径通幽处,禅房花木深。
明月松间照,清泉石上流。
山光悦鸟性,潭影空人心。
竹喧归浣女,莲动下渔舟。
万籁此都寂,但余钟磬音。
随意春芳歇,王孙自可留。
6.两首诗都运用了衬托的手法,第①首中的“万籁此都寂,但余钟磬音”是以声衬静;第②首中的“____________________,____________________”是以动衬静。
(2分)7.下列对着两首诗理解不正确一项是()(2分)A.两首诗都描绘了幽雅宁静的环境。
B.两首诗都表达了诗人高洁的精神追求。
C.两首诗都写了富有诗情画意的风光。
D.两首诗都是格律诗中的五言绝句。
(三)阅读下面语段,完成第8-10题(8分)北山愚公者,年且九十,面山而居。
惩山北之塞,出入之迂也,聚室而谋曰:“吾与汝毕力平险,指通豫南,达于汉阴,可乎?”杂然相许。
其妻献疑曰:“以君之力,曾不能损魁父之丘,如太行、王屋何?且焉置土石?”杂曰:“投诸渤海之尾,隐土之北。
”遂率子孙荷担者三夫,叩石垦壤,箕畚运于渤海之尾。
邻人京城氏之孀妻有遗男,始龀,跳往助之。
寒暑易节,始一返焉。
河曲智叟笑而止之曰:“甚矣,汝之不惠!以残年余力,曾不能毁山之一毛,其如土石何?”北山愚公长息曰:“汝心之固,固不可彻,曾不若孀妻弱子。
2017上海徐汇区初三二模数学试卷(含答案)
2016学年第二学期徐汇区初三模拟考数学试卷(时间100分钟满分150分)一、选择题(本大题共6题,满分24分)1、如果数轴上表示2和-4的两点分别是点A 和点B ,那么点A 和点B 之间的距离是A .-2B .2C .-6D .62、已知点M (1-2m ,m -1)在第四象限内,那么m 的取值范围是A .m >1B .m <21C .21<m <1D .m <21或m >13、如图1,AB ∥CD ,BE 平分∠ABC ,∠C =36°,那么∠ABE 的大小是A .18°B .24°C .36°D .54°4、直线y =ax +b (a ≠0)经过点A (-3,0)和点B (0,2),那么关于x 的方程ax +b =0的解是A .x =-3B .x =-1C .x =0D .x =25、某校开展“阅读季”活动,小名调查了班级里40名同学计划购书的花费情况。
并将结果绘制成如图2所示的条形统计图,根据图中相关信息,这次调查获取的样本数据的众数和中位数分别是A .12和10B .30和50C .10和12D .50和306、如图3,在△ABC 中,AC =BC ,点D 、E 分别是边AB 、AC 的中点,延长DE 到F 使得EF =DE ,那么四边形ADCF 是A .等腰梯形B .直角梯形C .矩形D .菱形二、填空题(本大题共12题,每题4分,满分48分)7、人体中红细胞的直径约为0.0000077米,将数0.0000077用科学计数法表示为________。
8、方程22=-x x 的解是________。
9、如果反比例函数y =xk (k ≠0)的图像经过点P (-1,4),那么k 的值是________。
10、如果关于x 的方程032=-+k x x 有两个相等的实数根,那么k 的取值范围是________。
11、将抛物线122+-=x x y 向上平移2个单位后,所得新抛物线的顶点坐标是________。
2017届上海市徐汇区初三物理二模卷(含答案)(可编辑修改word版)
2016 学年第二学期徐汇区初三模拟考物理部分一、选择题(共16 分)1.依据卢瑟福的原子模型理论,在原子中绕核高速旋转的是()A.原子B. 质子C.中子D. 电子2.四冲程柴油机在工作过程中,将机械能转化成内能的冲程是()A.吸气冲程B. 压缩冲程C. 做功冲程D. 排气冲程3.小徐在教室里能分辨出教室外老师的说话声,主要是一句声音的()A.音调B. 响度C.音色D. 以上三项都是4.以下各种单色光中,属于三原色光之一的是()A.蓝光B. 紫光C.黄光D. 橙光5.质量为0.2 千克的物体从空中下落,无题受到空气阻力位1 牛,其所受合力为()A. 1.2 牛B. 0.8 牛C. 2.96 牛D. 0.96 牛6.电动自行车两刹车手柄各有一个电键S1 和S2,在行驶中用任意手刹车,该手柄上的电键立即断开,电动自行车上的电动机停止工作,图1 所示的电路中符合要求的是()7.当烛焰离凸透镜4 厘米时,在凸透镜另一侧的光屏上成一个倒立放大的实像,该凸透镜的焦距可能为()A.1 厘米B. 3 厘米C. 4 厘米D. 5 厘米8.如图2 所示,甲乙两个均匀实心正方体放在水平地面上,它们对水平地面的压强相等,若分别沿水平方向截去体积相等的部分后它们剩余部分对地面的压强分别为P 甲,P 乙则()A.P 甲可能等于P 乙B. P 甲一定大于P 乙C. P 甲可能小于P 乙D. P 甲一定小于P 乙二、填空题(共24 分)9.最早测出大气压强值得科学家是;家庭电路中,点灯与电视机是关系(选填串联或并联),标有“220V,500W”字样的电饭锅,正常工作一小时,耗电度。
10.如图3 所示,撑杆跳运动员向上跃起的过程中,撑杆弯曲表明力可以改变物体的,运动员下落过程中动能(选填不变、增大或减小);以地面为参照物运动员是的(选填运动或静止)。
11.质量为10kg 的物体受到的重力大小为牛,方向,若该物体的体积为5x10-3 立方米,浸没在水中时受到的浮力大小为牛。
2017年上海市徐汇区中考英语二模试卷
2017年上海市徐汇区中考英语二模试卷2017学年徐汇区初三模拟考英语试卷2017.4(满分150分,考试时间100分钟)Part 1 Listening (第一部分听力)I. Listening Comprehension (听力理解): (共30分)A. Listen and choose the right picture (根据你听到的内容,选出相应的图片): (共6分)A B C DE F G H1. ______2. ______3. ______4. ______5. ______6. ______B. Listen to the dialogue and choose the best answer to the question you hear (根据你听到的对话和问题,选出最恰当的答案): (共8分)7. A) On the 1st floor. B) On the 3rd floor. C) On the 6th floor.D) On the 8th floor.8. A) At the airport. B) At the bus stop. C) At the train station.D) At the subway station.9. A) On foot. B) By taxi. C) By bike. D) By bus.10. A) Buying some cold drinks. B) Cleaning his room.C) Having a barbecue. D) Meeting Jenny.11. A) On Thursday. B) On Friday. C) On Saturday. D) On Sunday.12. A) The orange one. B) The pink one. C) The blue one. D) The green one.13. A) By using some magic. B) By taking a yoga course.C) By going on a diet. D) By calling himself Tim.14. A) Because they didn’t recognize her. B) Because they met a famous actress.C) Because the woman performed well. D) Because the play made them happy.C. Listen to the letter and tell whether the following statements are true or false (判断下列句子是否符合你听到的内容, 符合的用“A”表示,不符合的用“B”表示): (共6分)15. It was a letter to Daisy about Jason’s first day at his new school.16. Jason was excited because there are many students in the new school.17. Jason’s class teacher is Mrs. Black and she is a young and friendly lady.18. Jason has made friends with a nice boy from Hong Kong.19. Everyone in the school must learn Spanish as a second language.20. Jason has to do much maths homework on the Internet on the first day.D. Listen to the passage and complete the following sentences (听短文,完成下列内容。
2017年上海市徐汇区中考二模语文试题
(四)阅读下面语段,完成第 11-14 题(12 分) 曾巩,字子固,建昌南丰人。巩性孝友… …少与王安石游,安石声誉未振,巩导之于
欧阳修,及安石得志,遂与之异。神宗尝问:“安石何如人?”对曰:“安石文学行义①, 不减扬雄,以吝故不及。”帝曰:“安石轻富贵,何吝也?”曰:“臣所谓吝者,谓其勇于 有为,吝于改过耳。”帝然之。 (有删改) 【注释】①行义:行为道义。
(三)阅读下面语段,完成第 8-10 题(8 分) 北山愚公者,年且九十,面山而居。惩山北之塞,出入之迂也。聚室而谋曰:“吾与汝
毕力平险,指通豫南,达于汉阴,可乎?”杂然相许。其妻献疑曰:“以君之力,曾不能损 魁父之丘,如太行、王屋何?且焉置土石?”杂曰:“投诸渤海之尾,隐土之北。”遂率子 孙荷担者三夫,叩石垦壤,箕畚运于渤海之尾。邻人京城氏之孀妻有遗男,始龀,跳往助之。 寒暑易节,始一反焉。
河曲智叟笑而止之曰:“甚矣,汝之不惠。以残年余力,曾不能毁山之一毛,其如土石 何?”北山愚公长息曰:“汝心之固,固不可彻,曾不若孀妻弱子。虽我之死,有子存焉; 子又生孙,孙又生子;子又有子,子又有孙;子子孙孙无穷匮也,而山不加增,何苦而不平?” 河曲智叟亡以应。
8. 语段选自_________时期道家学派代表人物列御寇的著作《____________》。(2 分) 9. 下列加点词注音及解释不正确的一项是( )(3 分)
6. 两首诗都运用了衬托的手法,第①首中的“万籁此俱寂,但余钟磬音”是咦声衬静;第 ②首重的“______________,______________”是以动衬静。(2 分) 7. 下列对这两首诗理解不正确的一项是( )(2 分)
A. 两首诗都描绘了幽雅宁静的环境。 B. 两首诗都表达诗人高洁的精神追求。 C. 两首诗都谢了富有诗情画意的风光。 D. 两首诗都是格律诗中的五言绝句。
2017年徐汇区中考物理二模卷含答案
2017年徐汇区中考物理二模卷含答案理化试卷考生注意:1. 选择题中只有一个选项正确.请用2B 铅笔在答题纸的相应位置填涂。
2. 答题时.考生务必按答题要求在答题纸规定的位置作答.在本试卷上答题无效。
一、选择题(共16分)1. 依据卢瑟福的原子模型理论.在原子中绕核高速旋转的是2. 四冲程柴油机在工作过程中.将机械能转化为内能的冲程是3. 小徐在教室里能分辨出教室外老师的说话声.主要是依据声音的4. 以下各种单色光中.属于三原色光之一的是5. 质量为0.2千克的物体从空中落下.物体受到的空气阻力为1牛.其所受合力为6. 电动自行车两刹车手柄中各有一个电键£和S,・在行驶中用任一只手柄刹车时.该手柄上的电7. 当烛焰离凸透镜4厘米时.在凸透镜另一侧的光屏上成一个倒立、放大的实像。
该凸透镜的 焦距可能为(满分共150分100分钟完成) 部分2017.4A.原子B.质子C.中子D.电子A.吸气冲程B.压缩冲程C.做功冲程D.排气冲程A. 首调B .响度 C.音色 D.以上三项都是A.蓝光B.紫光C.黄光D.橙光B. 0.8 牛C. 2.96牛D. 0.96 牛键立即断开.电动自行车上的电动机停止工作。
图1所示的电路中符合要求的是图18. 如图2所示.甲、乙两个均匀实心正方体放在水平地面上.它们对水平地面的压强相等。
若分 别沿水平方向截去体积相等的部分后.它们剩余部分对地面的压强分别为P 甲、P 乙.则二、填空题(共24分) 9.最早测出大气压强值的科学家是 (1);家庭电路中.电灯与电视机之间是(2)连接(选填“串联”或“并联” )o 标有“220V 500W”字样的电饭锅.正常工作1小时.耗电(3)度。
10. 如图3所示.撑杆跳运动员向上跃起的过程中•撑杆弯曲表明力可以改变物体的(4) ;运 动员下落过程中动能(5)(选填“增大”、“不变”或“减小”);以地面为参照物.运动员是 (6) 的(选填“运动”或“静止” )o 11.质量为10千克的物体受到的重力大小为(7) 牛、方向 (8) .若该物体的体积为5X 10-3米.浸没在水中时受到的浮力大小为 (9) 牛。
2017年上海市徐汇区初三化学中考模二模试卷(含答案)
)
D. a 玻璃管内气体为氧气,可用带火星的木条检验 11. 有关物质的性质与用途对应正确的是( ) B. 烧碱具有碱性,可用来治疗胃酸过多 D. 氧气具有可燃性,可作火箭的燃料 ) 解释 分子之间有间隔 分子是不断地运动 构成物质的分子不同 原子本身的大小发生了改变
A. 活性炭具有吸附性,常用于自来水杀菌消毒 C. 氦气密度小和化学性质稳定,可充气球 12.下表中变化事实和相应的解释不一致的是( 事实 A. B. C. D.
2 (II)B; 2H 2O 2 2H 2O+O 2 ;F
MnO
(III)反应物的接触面积;反应物的浓度 26.(I) Na 2CO 3 Ca(OH) 2 CaCO 3 2NaOH
7
(II)二氧化碳溶于水、与水反应也可能使气球膨胀;将针筒中的 NaOH 溶液换成等体积的水,重复上述 实验,观察现象 (III)氯化钠;⑤;有白色沉淀,溶液由红色变为无色;①或④正确;NaCl、CaCl2、酚酞、水
2
)
17. 为验证 Mg、Fe、Cu 三种金属的活动性顺序,可选用的一组物质是( A. Cu、FeCl2 溶液、MgCl2 溶液 C. Mg、CuO、FeSO4 溶液 B. Fe、Cu、MgCl2 溶液
)
D. Fe、CuSO4 溶液、MgCl2 溶液 )
18. 只用一种试剂鉴别 BaCl2、NaCl、K2CO3 三种无色溶液,选用的试剂是( A. 石蕊试液 B. 澄清石灰水 C. 稀硫酸 D. 硝酸银溶液 )
2017 年第二次徐汇区初三模拟考
化学部分
可能用到的相对原子质量:H-1 C-12 Na-23 Mg-24 Al-27 K-39 N-14 O-16 Fe-56 S-32 Cu-64 Cl-35.5 Zn-65 Ca-40
上海市徐汇区中考英语二模考试
上海市徐汇区中考英语二模考试作者:日期: 22017学年徐汇区初三模拟考英语试卷(满分150分,考试时间100分钟)Part 1 Listening(第一部分听力)I. Listening Comprehension 听力理解):(共30 分)A. Listen and choose the right picture很据你听到的内容,选出相应的图片):(共6分)B. Listen to the dialogue and choose the best answer to the question you hear 根据你听至U的对话和问8. A) At the airport.9. A) On foot.10. A) Buying some cold drin ks.C) Having a barbecue.11. A) On Thursday. B) On Friday.12. A) The orange one. B) The pink one.13. A) By using some magic.C) By going on adiet.14. A) Because they didn 'recognize her.C) Because the woma n performed well.D) At the subway stati on.B) Clea ning his room.D) Meeti ng Jenny.题,选出最恰当的答案):(共8分)st7. A) On the 1 floor. B) On 3rd floor. C) On the 6th floor. D) On the 8th floor.2017.4B) At the bus stop.B) By taxi. C) By bike.C) At the train statio n.D) By bus.C) On Saturday. D) On Sun day.C) The blue one. D) The gree n one.B) By tak ing a yoga course.D) By calling himself Tim.B) Because they met a famous actress.D) Because the play made them happy.4C. Listen to the letter and tell whether the following statements are true or false (判断下歹U句子是否符合你听到的内容,符合的用“ A”表示,不符合的用“ B”表示):(共6分)15. It was a letter to Daisy about Jas on 'first day at his new school.16. Jas on was excited because there are many stude nts in the new school.17. Jason'class teacher is Mrs. Black and she is a young and frien dly lady.18. Jas on has made friends with a nice boy from Hong Kong.19. Every one in the school must lear n Spanish as a sec ond Ian guage.20. Jas on has to do much maths homework on the Internet on the first day.D. Listen to the passage and complete the following sentences听短文,完成下歹U内容。
2017年度上海徐汇区中考英语二模试卷
2017学年徐汇区初三模拟考英语试卷2017.4(满分150分,考试时间100分钟)Part 1 Listening (第一部分听力)I. Listening Comprehension (听力理解): (共30分)A. Listen and choose the right picture (根据你听到的内容,选出相应的图片): (共6分)A B C DE F G H1. ______2. ______3. ______4. ______5. ______6. ______B. Listen to the dialogue and choose the best answer to the question you hear (根据你听到的对话和问题,选出最恰当的答案): (共8分)7. A) On the 1st floor. B) On the 3rd floor. C) On the 6th floor. D) On the 8th floor.8. A) At the airport. B) At the bus stop. C) At the train station. D) At the subway station.9. A) On foot. B) By taxi. C) By bike. D) By bus.10. A) Buying some cold drinks. B) Cleaning his room.C) Having a barbecue. D) Meeting Jenny.11. A) On Thursday. B) On Friday. C) On Saturday. D) On Sunday.12. A) The orange one. B) The pink one. C) The blue one. D) The green one.13. A) By using some magic. B) By taking a yoga course.C) By going on a diet. D) By calling himself Tim.14. A) Because they didn’t recognize her. B) Because they met a famous actress.C) Because the woman performed well. D) Because the play made them happy.C. Listen to the letter and tell whether the following statements are true or false (判断下列句子是否符合你听到的内容, 符合的用“A”表示,不符合的用“B”表示): (共6分)15. It was a letter to Daisy about Jason’s first day at his new school.16. Jason was excited because there are many students in the new school.17. Jason’s class teacher is Mrs. Black and she is a young and friendly lady.18. Jason has made friends with a nice boy from Hong Kong.19. Everyone in the school must learn Spanish as a second language.20. Jason has to do much maths homework on the Internet on the first day.D. Listen to the passage and complete the following sentences (听短文,完成下列内容。
2017年上海市徐汇区中考二模试卷(含答案)---2017.04.14
2016学年第二学期徐汇区初三模拟考英语试卷2017.4Part 2 Phonetics, Vocabulary and Grammar(第二部分语音、词汇和语法)II. Choose the best answer(选择最恰当的答案):(共20分)26. Which of the following words matches the sound /nju:/?A. nowB. norC. newD. near27. Brooklyn Beckham, ______ eldest child of the Beckhams, will sell his photo book in May, 2017.A. aB. anC. theD. /28. Nobody can stop a person with a strong will _______ realizing his dreams.A. ofB. fromC. withD. by29. If they don’t prepare _______ well for the interview, they may fail to get the offer.A. theyB. themC. theirsD. themselves30. When Frank complained about the cold winter, Jane ________ the sunny summer days in Australia.A. enjoysB. was enjoyingC. has enjoyedD. will enjoy31. Joe can only take two of his family members into the studio and leave ______ waiting outside.A. the othersB. othersC. otherD. the other32. _______ the end of yesterday, there had been more than 10 car accidents because of the typhoon.A. ByB. FromC. AtD. To33. The old ______ enjoy the convenience of technologies because they don’t accept new things quickly.A. mustn’tB. needn’tC. can’tD. shouldn’t34. The panda _____ to get used to the new environment since he returned from America.A. learnsB. is learningC. learnedD. has learnt35. The audience were attracted by ________ the stories and the reading at the new program “Readers”.A. bothB. neitherC. eitherD. none36. After the operation on Grandma’s heart, she becomes much ______ at present.A. goodB. wellC. betterD. best37. Every picture in the coloring book Secret Garden was not drawn by computer ______ all by hand.A. andB. soC. butD. or38. The year’s best picture was wrongly awarded to La La Land, which ______ never ______ before.A. would…happenB. was…happeningC. has…happenedD. had…happened39. A:________can we get the chance to join the party?B:To join this party, you have to dress up like a Superhero.A. WhyB. WhatC. HowD. Where40. Jenny is an independent girl and she is considering ______ a boarding school(寄宿学校).A. enterB. enteringC. to enterD. entered41. Every Monday morning all the staff members have a meeting to report their recent work, _____?A. h aven’t theyB. don’t theyC. aren’t theyD. won’t they42. Alex had no interest in painting _______ he met a creative and patient art teacher one day.A. whenB. becauseC. untilD. if43. _______ good chance those teenagers were given to experience different cultures!A. HowB. WhatC. What aD. What an44. A:The dishes you cooked tonight are really delicious.B:__________A. Of course!B. I’m glad you like them !C. That’s all right!D. Never mind!45. A:Excuse me, can I ask you some questions about the changes in Shanghai?B:_________A. Sure, go ahead!B. Congratulations!C. I’m so sorry!D. Nice to meet you!Ⅲ.Complete the following passage with the words or phrases in the box. Each can only be used once(将下列单词或词组填入空格。
上海市徐汇区初三化学中考模二模试卷.docx
2017年第二次徐汇区初三模拟考化学部分 可能用到的相对原子质量:H -1 C -12 N -14 O -16 S -32 Cl -35.5 Na -23 Mg -24 Al -27 K -39 Ca -40 Fe -56 Cu -64 Zn -65六、选择题(共20分)1. 大气中CO 2含量增加会导致的环境问题是( ) A. 酸雨B. 温室效应C. 雾霾D. 可吸入微粒物增加2. 五氧化二碘(I 2O 5)可用来测定空气中一氧化碳的含量,I 2O 5中碘元素的化合价为( ) A. -5B. +2C. +3D. +53. 物质的化学式与其名称(或俗名)相符合的是( ) A. FeCl 2 氯化亚铁B. Na 2SO 3 硫酸钠C. KCl 氯酸钾D. CaO 熟石灰4. 下图所示实验操作正确的是( )A. 点燃酒精灯B. 往试管里送入固体粉末C. 过滤D. 测定溶液的pH5. 诗词是民族灿烂文化中的瑰宝。
下列著名诗句中隐含有化学变化的是( ) A. 只要功夫深,铁杵磨成针B. 夜来风雨声,花落知多少C. 粉骨碎身浑不怕,要留清白在人间D. 风萧萧兮易水寒6. 溶液的基本特征是( ) A. 无色透明B. 无色均一C. 均一稳定D. 纯净稳定7. 属于同素异形体的是( ) A. 一氧化碳与二氧化碳 B. 冰和水 C. 石墨与金刚石 D. 生石灰与熟石灰8. 下列反应属于置换反应是( ) A. 32CaCO CaO+CO −−−→↑高温B. 2323K CO CaCl CaCO 2KCl +→↓+C. 2322H CO H O CO →+↑D. 2442n+H SO ZnSO H Z →+↑9. 含有两种原子团的物质是( ) A. Mg(OH)2 B. K 2CO 3C. MgSO 4D. NH 4NO 310. 电解水的实验如右图所示。
下列对电解水实验的说法正确的是( )A. 由电解水实验可得出水是由氢气与氧气组成B. a 、b 两个玻璃管内气体的体积之比约为2:1C. 电解水的化学方程式为:222H O H O −−−→↑+↑电解D. a 玻璃管内气体为氧气,可用带火星的木条检验 11. 有关物质的性质与用途对应正确的是( )A. 活性炭具有吸附性,常用于自来水杀菌消毒B. 烧碱具有碱性,可用来治疗胃酸过多C. 氦气密度小和化学性质稳定,可充气球D. 氧气具有可燃性,可作火箭的燃料12.下表中变化事实和相应的解释不一致的是( )事实解释A. 50mL 水和50mL 酒精混合后的体积小于100mL 分子之间有间隔B. 敞口放置的浓盐酸逐渐变稀 分子是不断地运动C. 氧气和臭氧(O 3)的化学性质不同 构成物质的分子不同D.温度计中的水银(汞)热胀冷缩原子本身的大小发生了改变13. 对实验现象的描述正确的是( ) A. 磷燃烧时,会产生大量的白雾 B. 铁丝在空气中能剧烈燃烧,火星四射C. 木炭在氧气中燃烧时发出白光D. 硫在空气中燃烧时,会发出黄色火焰14. 随着经济的发展,能源与环境成为人们日益关注的问题。
2017年上海市徐汇区初三英语二模(精美版,含答案听力材料)
2016学年第二学期徐汇区初三模拟考英语试卷2017。
4(满分150分,考试时间100分钟)Part 1 Listening (第一部分听力)I。
Listening Comprehension (听力理解):(共30分)A。
Listen and choose the right picture (根据你听到的内容,选出相应的图片): (共6分)A B C DE F G H1。
______ 2。
______ 3. ______ 4. ______ 5。
______ 6. ______B. Listen to the dialogue and choose the best answer to the question you hear (根据你听到的对话和问题,选出最恰当的答案):(共8分)7. A) On the 1st floor。
B)On the 3rd floor. C) On the 6th floor。
D)On the 8th floor。
8。
A)At the airport。
B) At the bus stop. C) At the train station. D)At the subway station。
9. A) On foot. B)By taxi。
C) By bike。
D)By bus。
10。
A) Buying some cold drinks. B)Cleaning his room.C) Having a barbecue. D)Meeting Jenny。
11。
A) On Thursday。
B) On Friday. C) On Saturday。
D)On Sunday。
12. A)The orange one. B)The pink one。
C)The blue one. D)The green one。
13。
A) By using some magic。
B) By taking a yoga course。
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2016学年第二学期徐汇区初三模拟考英语试卷 2017.4Part 2 Phonetics, Vocabulary and Grammar(第二部分语音、词汇和语法)II. Choose the best answer(选择最恰当的答案):(共20分)26. Which of the following words matches the sound /nju:/?A. nowB. norC. newD. near27. Brooklyn Beckham, ______ eldest child of the Beckhams, will sell his photo book in May, 2017.A. aB. anC. theD. /28. Nobody can stop a person with a strong will _______ realizing his dreams.A. ofB. fromC. withD. by29. If they don’t prepare _______ well for the interview, they may fail to get the offer.A. theyB. themC. theirsD. themselves30. When Frank complained about the cold winter, Jane ________ the sunny summer days in Australia.A. enjoysB. was enjoyingC. has enjoyedD. will enjoy31. Joe can only take two of his family members into the studio and leave ______ waiting outside.A. the othersB. othersC. otherD. the other32. _______ the end of yesterday, there had been more than 10 car accidents because of the typhoon.A. ByB. FromC. AtD. To33. The old ______ enjoy the convenience of technologies because they don’t accept new things quickly.A. mustn’tB. needn’tC. can’tD. sh ouldn’t34. The panda _____ to get used to the new environment since he returned from America.A. learnsB. is learningC. learnedD. has learnt35. The audience were attracted by ________ the stories and the reading at the new program “Readers” .A. bothB. neitherC. eitherD. none36. After the operation on Grandma’s heart, she becomes much ______ at present.A. goodB. wellC. betterD. best37. Every picture in the coloring book Secret Garden was not drawn by computer ______ all by hand.A. andB. soC. butD. or38. The year’s best picture was wrongly awarded to La La Land, which ______ never ______ before.A. would…happenB. was…happeningC. has…happenedD. had…happened39. A:________can we get the chance to join the party?B:To join this party, you have to dress up like a Superhero.A. WhyB. WhatC. HowD. Where40. Jenny is an independent girl and she is considering ______ a boarding school(寄宿学校).A. enterB. enteringC. to enterD. entered41. Every Monday morning all the staff members have a meeting to report their recent work, _____?A. haven’t theyB. don’t theyC. aren’t theyD. won’t they42. Alex had no interest in painting _______ he met a creative and patient art teacher one day.A. whenB. becauseC. untilD. if43. _______ good chance those teenagers were given to experience different cultures!A. HowB. WhatC. What aD. What an44. A:The dishes you cooked tonight are really delicious.B:__________A. Of course!B. I’m glad you like them !C. That’s all right!D. Never mind!45. A:Excuse me, can I ask you some questions about the changes in Shanghai?B:_________A. Sure, go ahead!B. Congratulations!C. I’m so sorry!D. Nice to meet you!Ⅲ.Complete the following passage with the words or phrases in the box. Each can only be used once(将下列单词或词组填入空格。
每空格限填一词,每个单词或词组只能填一次):(共8分)The Origins of April Fools DayWhat is April Fools Day and where does it come from?It is commonly believed that in medieval (中世纪)France, New Year was celebrated on 1 April. Then in 1562, a new calender was introduced, changing New Year to 1 January. With no modern ___46___, news travelled slowly and new ideas were often questioned. Many people did not ___47___ the change, while some just forgot. These people were called fools. People send invitations to ‘New Year’ parties that were not existed and other jokes were played. Then a __48__ of playing jokes on April 1st started. The sustom finally ___49___ to England and Scotland, and it was later transported across the Atlantic to the American and the French. April Fools Day has now developed into an international festival of fun, with different nationalities celebrating the day in special ways.April Fools Day around the WorldIn France and Italy, if someone plays a trick on you, you are the ‘fish of April’. By the month of April fish have only just hatched(孵化)and are easy to ___50___. Children stick paper fish to their friends’ backs and chocolate fish are found in the shops.In Scotland, April Fools Day lasts for two days!The second day is called ‘Taily Day’. Often a sign saying ‘kick me’ is stuck onto someone’s back without ____51___.Today, Americans and the British play small tricks on friends and ___52___ on April 1st. A common trick is to point to a friend’s shoe and say“Your shoe is not tied.”When they look down, they are laughed at. Schoolchildren might tell a friend that school has been cancelled.A bag of flour might be ___53___ on the top of a door so that when the ‘victim’opens the door, the flour empties over their head.Most April Fool jokes are in good fun and not meant to harm anyone. The best trick is the one where everyone laughs, especially the person upon whom the joke has been played.IV. 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)54. We all hope that those baby pandas in the zoo can grow up ________.(happy)55. After the 1000 meter’s race, I could hardly move my _________.(foot)56. Jeff keeps running every day and he looks ________ than his classmates.(strong)57. People celebrate the Dragon Boat Festival on different dates. It is on May the _______ this year.(thirty)58. It is ________ of some online store sellers to lie about the quality(质量)of their products.(honest)59.Tim visits his junior high school teachers every Teachers’ Day to express his _______.(thankful)60. Since last year, the new medicine has successfully helped to ______ many people’s lives.(safety)61. With the help of that famous ________, the bridge construction was completed on time.(engine)V. Complete the following sentences as required(根据所给要求,完成下列句子。