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2016广东省中山市初二期末考试答案

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2016广东省中山市初二期末考试答案(一)
广东省中山市2015-2016学年八年级上期末数学试卷含答案解析

2015-2016学年广东省中山市八年级(上)期末数学试卷

一、选择题(共10小题,每小题3分,满分30分)

1.下列图形是轴对称图形的是( )

A. B. C. D.

2.下列运算正确的是( )

A.(a+b)2=a2+b2 B.(﹣2a2b)3=﹣8a5b3

C.a6÷a3=a2 D.a3•a2=a5

3.若分式的值为0,则x的值为( )

A.﹣1 B.0 C.2 D.﹣1或2

4.点M(1,﹣2)关于y轴的对称点坐标为( )

A.B.C.(﹣1,2) (2,﹣1) (1,2) D.(﹣1,﹣2)

5.若3x=15,3y=3,则3x﹣y=( )

A.5 B.3 C.15 D.10

6.分解因式8a2﹣8ab+2b2结果正确的是( )

A.2(2a﹣b)2 B.8(a﹣b)2 C.4(a﹣b)2 D.2(2a+b)2

7.某种病毒的直径约为0.0000000028米,该直径用科学记数法表示为( )

A.0.28×10﹣8米 B.2.8×10﹣10米 C.2.8×10﹣9米 D.2.8×10﹣8米

8.将一副直角三角尺如图放置,若∠AOD=20°,则∠BOC的大小为(

)

A.140° B.160° C.170° D.150°

9.CD是AB边上的高线,BE平分∠ABC,BC=8,DE=3,△ABC中,如图,交CD于点E,

则△BCE的面积等于( )

A.11 B.8 C.12 D.3

10.如图,AE,AD分别是△ABC的高和角平分线,且∠B=36°,∠C=76°,则∠DAE的度数为(

)

A.40° B.20° C.18° D.38°

二、填空题(共6小题,每小题4分,满分24分)

11.使式子1+有意义的x的取值范围是.

12.已知正n边形的一个内角为135°,则边数n的值是.

13.方程的解是

14.计算:(2x﹣1y3)2÷(x﹣3y)

15.如图所示,已知点A、D、B、F在一条直线上,AC=EF,AD=FB,要使△ABC≌△FDE,还需添加一个条件,这个条件可以是__________.(只需填一个即可)

16.如图,△ABC中,AB=AC,AD平分∠BAC,点E是线段BC延长线上一点,连接AE,点C在AE的垂直平分线上,若DE=12cm,则△ABC的周长是__________.

三、解答题(共9小题,满分66分)

17.请你从下列各式中,任选两式作差,并将得到的式子进行因式分解.4a2,(x+y)2,1,9b2.

18.化简:.

19.如图,在平面直角坐标系中,函数y=x的图象l是第一、三象限的角平分线. 实验与探究:

由图观察易知A(0,2)关于直线l的对称点A′的坐标为(2,0),请在图中分别标明B(5,3)、C(﹣2,5)关于直线l的对称点B′、C′的位置,并写出它们的坐标:B′、C′

归纳与发现:

结合图形观察以上三组点的坐标,你会发现:坐标平面内任一点P(m,n)关于第一、三象限的角平分线L的对称点P′的坐标为__________.

20.某市有一块长为(3a+b)米,宽为(2a+b)米的长方形地块,规划部分计划将阴影部分进行绿化,中间修建一座雕像.

(1)请用含a,b的代数式表示绿化面积s;

(2)当a=3,b=2时,求绿化面积s.

21.如图,已知AC⊥CB,DB⊥CB,AB⊥DE,垂足为F,AB=DE,E是BC的中点. (1)求证:BD=BC;

(2)若AC=3,求BD的长.

22.如图,在△ABC中,AB=AC,AM是外角∠DAC的平分线.

(1)实践与操作:尺规作图,并在图中标明相应字母(保留作图痕迹,不写作法),作线段AC的垂直平分线,与AM交于点F,与BC边交于点E,连接AE.

(2)猜想并证明:∠EAC与∠DAC的数量关系并加以证明.

23.某市计划进行一项城市美化工程,已知乙队单独完成此项工程比甲队单独完成此项工程多用10天,且甲队单独施工30天和乙队单独施工45天的工作量相同.

(1)甲、乙两队单独完成此项工程各需多少天?

(2)已知甲队每天的施工费用为8000元,乙队每天的施工费用为6000元,为了缩短工期,指挥部决定该工程由甲、乙两队一起来完成,则该工程施工费用是多少元?

24.如图,四边形ABCD中,∠B=∠C=90°,∠CED=35°,DE平分∠ADC.

(1)求∠DAB的度数;

(2)若E为BC中点,求∠EAB的度数.

25.n相交于点B,C分别为直线m,n上的点,AB=BC=1,已知直线m,点A,且∠ABC=60°,

点E是直线m上的一个动点,点D是直线n上的一个动点,运动过程中始终满足DE=CE.

(1)如图1,当点E运动到线段AB的中点,点D在线段CB的延长线上时,求BD的长.

(2)如图2,当点E在线段AB上运动,点D在线段CB的延长线上时,试确定线段BD与AE的数量关系,并说明理由.

2016广东省中山市初二期末考试答案(二)
中山市2015-2016上期期末水平测试数学答案(八年级)

中山市2015—2016学年度上学期期末水平测试

一、(每小题3分)1.A,C; 2.D; 3.C; 4.D; 5.A; 6.A; 7.C; 8.B; 9.C; 10.B.

二、(每小题4分)11.x1;12.8; 13.x1; 14.4xy5; 15. 答案不唯一(如

八年级数学参考答案及评分建议

ACEF或CE等); 16.24cm .

三、17.解:答案不唯一(式子列对给2分,因式分解对给4分)

a1(a1)2

18. 解:原式 = …………………………………………………2分 a2a1a2aa1 = …………………………………………………………4分 a2a21

= …………………………………………………………………6分

a2

/

19.解:(1)标点,每点1分, B(3,5)、C(5,-2)(坐标每点1分)

/

/

(2)P(b,a) (2分)

四、20. 解:(1) S(3ab)(2ab)(ab)……………………………………3分

2

(6a25abb2)(a22abb2)

2

5a3ab………………………………………………………5分 当a3,b2时,原式=63………………………………………………………………7分

21.(1)证明:

D

A

C

E

B

DBBCDBC90 DEBD90DEAB

EFB90 FEBABC90

ABCD……………………………………………………………2分

八年级数学答案 第1页(共3页)

ACCB

ACBDBC90又ABDE

ACB≌EBD

BDBC……………………………………………………………………4分

(2)解: ACB≌EBD

BEAC3 ……………………………………………………………5分

E是BC的中点

BC2BE6

………………………………………………………………7分

BDBC6

22.(1)作出垂直平分线并标上字母 …………………………………………………2分

(2)猜想:EAC

1

DAC …………………………………………………3分 2

理由如下:∵AB=AC

∴∠B=∠C, ………………………………………………………………4分 ∵∠DAC是△ABC的外角

∴∠DAC=∠B+∠C=2∠C……………………………………………………5分 ∵EF垂直平分AC ,

EAEC

EACC

……………………………………………7分 1

DAC2

五、解答题(三)

23.解:(1)设甲单独完成需x天,根据题意得: …………………………………1分

3045

 …………………………………………………………………3分 xx10

解得:x20 ………………………………………………………………4分

经检验x20是原方程的解 ………………………………………………5分

x1030

答:甲单独完成需20天,乙单独完成需30天 (2)甲乙合作的天数:1(总费用为:

八年级数学答案 第2页(共3页)

11

)12(天) …………………………7分 2030【2016广东省中山市初二期末考试答案】

(80006000)12168000(元)…………………………………………8分

答:该工程施工费用是168000元. …………………………………………9分

24. 解:(1)∵C90,CED35

∴CDE55 ………………………………………………………………1分 ∵DE平分ADC

∴ADC2CDE110 .…………………………………………………3分

∵B90

∴DAB70. ……………………………………………………………4分 (2)过E点作EFAD于F点

∵ DE平分ADC

∴ CEFE …………………………6分 ∵E为BC中点

∴BECEEF …………………7分

∴AE平分DAB. ……………………8分 ∵DAB70

∴EAB35 ……………………………………………………………9分 25.证明:(1)∵ABC60,ABBC,

∴ABC为等边三角形

∴ACB60 …………………………………………………1分 又∵E为线段AB的中点

∴ECB

1

ACB30 2

∵DECE

∴EDB30 …………………………………………………………3分 ∵ABCEDBDEB ∴DEB30 ∴BDDE

(2)BDAE ………………………………………………………5分 理由如下:过E作EF//BC交AC于点F ∵EF//BC

∴AFEACB60,………………6分 ∴EFC120,AFE

A

八年级数学答案 第3页(共3页)

11

AB ……………………………………………4分 22

∴EFEA ∵ABC60 ∴EBD120 ∴EFCEBD ∵CEDE ∴EDBECB

∵EDBDEBECBECF60

∴DEBECF ……………………………………………………8分 ∴EDB≌CEF ∴DBEF ∵EFEA

∴DBAE………………………………………………………………9分

D

B

八年级数学答案 第4页(共3页)

2016广东省中山市初二期末考试答案(三)
中山市2015–2016八年级英语上册期末试卷及答案

【2016广东省中山市初二期末考试答案】

中山市2015–2016八年级英语上册期末试卷及答案

(全卷听说25分,笔试95分,满分120分,本卷在80分钟内完成。)

一、 单项填空(本大题有20小题,每小题1分,共20分)

( 号考

( 线 ( ( 名 ( 姓 封 ( ( 别 班 ( 密 ( ( 校( 学 ( )1.Tom is good at computer science, and he wants to be a(an) _________ . A. computer programmer B. cook C. engineer D. actor )2.—______ is it from your home to the school? —About ten minutes’ walk. A. How far B. How long C. How often D. How soon )3.—______ you _______ to see the film? —Yes, I did. A. Did, went B. Did, go C. Do, went D. Do, go )4.—There __________ the talent show The Voice of China tomorrow.

A.will have B.are going to be C.is going to be D.are going to have

)5.She is______ than any other girl in her class. So she is______ .

A outgoing, more outgoing B more outgoing, most outgoing C more outgoing, the most outgoing D most outgoing, more outgoing

)6.I can’t get ___________ because my family isn’t _____________. A. money enough, rich enough B. enough money, enough rich C. enough money, rich enough D. money enough, enough rich )7.—Will people use money ________ 100 years?

—No, they won’t. Everything will be free. A.on B.in C.at D.with

)8.—What do you think of talk shows? — A. It doesn’t matter B. They can’t stand C. It’s all right D. I don’t mind them )9.—What’s on _________side of the hill, mum? —A big lake. A. other B. others C. another D. the other )10.—Do you think our class will beat Class 3 in the football match?

—Yes, we have better players. I ______ us to win. A.hope B.except C.expect D.prefer

)11.In the game, you should keep your hands _______ and your eyes ______. A. opened, closed B. open, close C. opened, close D. open, closed )12. The Yangzi River is one of ________ in the world. A. the longest rivers B. the longest river C. longer rivers D. longer river

( )13.— Do you know Bigbang?

—Sure. They often ______ on TV. I know them very well.

A.happen B.appear C.become D.take ( )14.That made me very excited.

A.to feel B.feeling C. felt D. feel

( )15.— What do you ________ My Love from the Star? — Pretty good. It is popular with many people. A. care about B. hear about C. think of D. find out ( )16.Although Peter and Rick are brothers, they have little ____ common. A. for B. on C. in D. of ( )17.—The winter vacation is coming. Where do you want to go?

—Oh, we are planning ____ the Great Wall. A.visit B.to visit C.visiting D.visited

( )18.— Shall we have a picnic tomorrow?

— the weather is fine, we will go. A.If B.As C.When D.Because

( )19.This meeting is very important to him, so I think he ________ it ________. A. take…serious B. takes…serious C. take …seriously D. takes… seriously ( )20.—Susan, you did a good job in the final exam.

—________. A.Thank you B.You’re welcome C.That’s all right D.No problem

二、完形填空(本大题共10小题,每小题1分,共10分)

通读下面短文,掌握其大意,然后在各小题所给的四个选项中,选出一个最佳答案,并将其字母编号填写在题前的括号内。

Jack in a small town in England. He always stayed in England his holidays, but last year he thought, “I’ve never been to countries. All my friends go to Spain, they like it very much, so this year I’m going there, too.” So he got on a to Spain and at the airport of the capital, Madrid, and stayed in a hotel for a few days. On the first morning he went for a walk. In England people drive on the left, but in Spain they drive on the right. Jack forgot about this, and he was walking on a busy street, a bicycle knocked him down.

Jack on the ground for a few minutes and then he sat up and said, “Where am I?” Just then an old man selling maps went past him. When he heard Jack’s words, he said to him

( )21. A. flew ( )22. A. for ( )23. A. all

B. lived B. off

C. went C. with C. other

D. dropped D. into D. any

B. both

( )24. A. and ( )25. A. bus ( )26. A. reached ( )27. A. down ( )28. A. before ( )29. A. lay

B. but B. left B. up

C. though C. train C. arrived C. away C. since C. fell

D. however D. bike D. stayed D. out D. after D. jumped

B. plane

B. while B. stood

( )30. A. once again B. on time C. at times D. at once

三、阅读理解(本大题有15小题,每小题2分,共30分)

【2016广东省中山市初二期末考试答案】

阅读下列表格和短文,并做后面的题目。从每小题所给的四个选项中,选出能回答所提问题或完成所给句子的最佳答案,将其字母编号填写在题前的括号内。

A

( )31. If you want to learn dancing, you can call___________.

A. 271-1399

B. 488-6888

C. 231-2899

D. 301-2768

( )32. You can enjoy Jay Chou’s music at __________ in the music hall.

A. 9:00 pm on July 23 C. 7:30 pm every day A. American Jazz

B. 8:00 pm on July 20 D. 9:30 pm on July 1 B. pop songs D. Spanish dancing B. the music hall D. the meeting hall

( )33. You can learn _________ at John Smith’s.

C. the whole of Chinese history A. Daqian Museum C. John Smith’s

( )34. There is a big show on history at _____________.

( )35. If Mr. Zhong wants to go to the museum with his wife and ten-year-old daughter,

how much should he pay for it?

A. ¥70.

B.¥100.

C.¥125.

D.¥200.

B

Last autumn my parents were studying in Canada, and brought me over with them. It was soon my birthday. Then came Halloween. Once I asked Mum why there was Halloween. She told me a lot about ghosts(鬼).

“Sweets are like good words for the dead,” Mum told me. “The more, the better. They can help the dead to a better place.

One day before Halloween, Mum bought me witches’(女巫) clothes. They were black, with a hat.

The next day, at about 6:30 pm, I went out with my parents. It was dark. Many people got together around a house. They were asking for sweets. Lots of children were dressed in different clothes. I pushed in and stretched(伸) out my hand, I got some.

“Wow! There’s nothing hard about this,” I thought.

Some kids left the house and started to ask for sweets door to door. I decided to go with them. I wanted more. I was a little afraid at first. But the people at each house were very kind. They gave me lots of sweets.

When I went home that day, I found that my sweets could fill a whole big box! “The sweets could last through the year!” I thought, and they did. ( )36. My parents lived in Canada for________ last year.

A. studying A. my birthday

B. making money B. Halloween

C. a tour

D. a visit to me D. my new semester

( )37. My mother bought me witches’ clothes for _________.

C. family party

( )38. I asked for sweets door to door _________.

A. On the morning of my birthday C. On the morning of Halloween

B. On the evening before Halloween D. On the evening of Halloween

( )39. Which of the following is NOT true according to the passage?

A. I went over to Canada with my parents last autumn. B. On Halloween, the more sweets you get, the better it is. C. It was not easy for me to ask for sweets door to door. D. People were very kind when I asked for sweets. A. Life in Canada

B. An unforgettable Halloween D. My visit to Canada

( )40. What is the best title for the passage?

C. My special Birthday

C

配对阅读 请为左栏的五个人的问题选择最佳的选项,有两项是多余的。

四、短文填空(本大题共10小题,每小题1.5分,共15分。

Reality TV shows(真人秀节目) are popular these days. There are different of programs such as singing competition and cooking competition.

Reality TV shows some advantages(好处). First of all, with so many kinds of reality TV shows, people can choose what they are interested . Some people like watching

programs building houses or traveling around the world.good way to find talented people. Some people can get jobs part in the shows. Thirdly, people on the shows can have interesting experiences and meet new people.

2016广东省中山市初二期末考试答案(四)
广东省中山市2015-2016学年八年级上学期期末考试数学试题带答案

广东省中山市2015-2016学年第一学期期末水平测试试卷

八年级数学

(测试时间:100分钟,满分:120分)

一、单选选择题(共10个小题,每小题3分,满分30分)

1.下列图形是轴对称图形的是

2.下列运算正确的是

A.(ab)2a2b2 B.(2a2b)38a5b3 C.aaa D.aaa

3.若分式632325x2的值为0,则x的值为 x1

A.-1 B.0 C.2 D.-1或2

4.点M(1,2)关于y轴的对称点坐标为

A.(1,2) B.(2,1) C.(1,2) D.(1,2)

5.若315,33,则3xyxy

A.5 B.3 C.15 D.10

6.分解因式8a8ab2b结果正确的是

A.2(2ab) B.8(ab) C.4(ab) D.2(2ab)

7.某种病毒的直径约为0.0 000 000 028米,该直径用科学记数法表示为

A.0.2810米 B.2.810810222222米 C.2.810米 D.2.810米

0988.将一副直角三角尺如图放置,若AOD20,则BOC的大小为

A.140 B.160 C.170 D.150

0000

9.如图,ABC中,CD是AB边上的高线,BE平方ABC,

交CD于点E,BC8,DE3,则BCE的面积等于

A.11 B.8 C.12 D.3

10. 如图,AE,AD分别是ABC的高和角平分线,且B360,C760,则DAE的度数为

A.40 B.20 C.18 D.38

0000

二、填空题(共6个小题,每小题4分,满分24分)

11. 使式子1B D E C 1有意义的x的取值范围是 . x1

012. 已知正n边形的一个内角为135,则边数n的值是 .

13. 方程4x51的解是 . x22x

132314. 计算(2xy)(xy) .

15.如图所示,已知点A,D,B,F在一条直线上,AC//EF,ADFB,要使ABC≌FDE,还需添加一个条件,这个条件可以是 .

16.如图,ABC中,ABAC,AD平方BAC,点E是线段BC延长线上一点,连接AE,点C在AE夫人垂直平方线上,若DE12cm,则ABC的周长是 .

A C E B F 第15题图 B

D C 第16题图 E

三、解答题(一)(共3个小题,每小题6分,满分18分)

17. (6分)请你从下列各式中,任选两个式子作差,并将得到的式子进行因式分解。

4a2,(xy)2,1,9b2

18. (6分)化简:

19. (6分)如图,在平面直角坐标系中,直线l是第一、三象限的角平分线。

(1)由图观察易知点A(0,2)关于直线l的对称点A坐标为(2,0),请在图中分别标明点'a1a22 a2a1a2a1

B(5,3),C(2,5)关于直线l的对称点B',C'的位置,并写出它们的坐标:B' 、C';

(2)结合图形观察以上三组点的坐标,你发现:坐标平面内任一点P(a,b)关于第一、三象限的角平分线l的对称点P坐标为 。 '

A【2016广东省中山市初二期末考试答案】

A

’ B

C

四、解答题(二)(共3个小题,每小题7分,满分21分)

20. (7分)某市有一块长为(3ab)米,宽为(2ab)米的长方形地块,规划部门计划将阴影部分进行绿化中间修建一座雕像,(1)请用含a,b的代数式表示绿化面积s;(2)当a3,b2时,求绿化面积。

21. (7分)如图,已知ACCB,DBCB,ABDE,垂足为F,ABDE,E是BC的中点,(1)求证:BDBC;(2)若AC3,求BD的长。

22. (7分)如图,在ABC中,ABAC,AM是外角DAC的平分线。

(1)实践与操作:尺规作图,并在图中标明相应字母(保留作图痕迹,不写作法)。作线段AC的垂直平分线,与AM交于点F,与BC交于点E,连接AE.

(2)猜想并证明:EAC与DAC的数量关系并加以证明。【2016广东省中山市初二期末考试答案】

五、解答题(三)(共3个小题,每小题9分,满分27分)

23. (9分)某市计划进行一项城市美化工程,已知乙队单独完成此项工程比甲队单独完成此项工程多用10天,且甲队单独施工30天和乙队单独施工45天的工作量相同。

(1)甲、乙两队单独完成此项工程各需多少天?

(2)已知甲队每天的施工费用为8000元,乙队每天的施工费用为6000元。为了缩短工期,指挥部决定该工程由甲、乙两队一起完成。则该工程施工费用是多少元?

2016广东省中山市初二期末考试答案(五)
广东省中山市2015-2016学年八年级上学期期末考试数学试题

中山市2015-2016学年第一学期期末水平测试试卷

八年级数学

(测试时间:100分钟,满分:120分)

一、单选选择题(共10个小题,每小题3分,满分30分)

1.下列图形是轴对称图形的是

2.下列运算正确的是

A.(ab)2a2b2 B.(2a2b)38a5b3 C.aaa D.aaa

3.若分式632325x2的值为0,则x的值为 x1

A.-1 B.0 C.2 D.-1或2

4.点M(1,2)关于y轴的对称点坐标为

A.(1,2) B.(2,1) C.(1,2) D.(1,2)

5.若315,33,则3xyxy

A.5 B.3 C.15 D.10

6.分解因式8a8ab2b结果正确的是

A.2(2ab) B.8(ab) C.4(ab) D.2(2ab)

7.某种病毒的直径约为0.0 000 000 028米,该直径用科学记数法表示为

A.0.2810米 B.2.810810222222米 C.2.810米 D.2.810米

0988.将一副直角三角尺如图放置,若AOD20,则BOC的大小为

A.140 B.160 C.170 D.150

0000

9.如图,ABC中,CD是AB边上的高线,BE平方ABC,

交CD于点E,BC8,DE3,则BCE的面积等于

A.11 B.8 C.12 D.3

10. 如图,AE,AD分别是ABC的高和角平分线,且B360,C760,则DAE的度数为

A.40 B.20 C.18 D.38

0000

二、填空题(共6个小题,每小题4分,满分24分)

11. 使式子1B D E C 1有意义的x的取值范围是 . x1

012. 已知正n边形的一个内角为135,则边数n的值是 .

13. 方程4x51的解是 . x22x

132314. 计算(2xy)(xy) .

15.如图所示,已知点A,D,B,F在一条直线上,AC//EF,ADFB,要使ABC≌FDE,还需添加一个条件,这个条件可以是 .

16.如图,ABC中,ABAC,AD平方BAC,点E是线段BC延长线上一点,连接AE,点C在AE夫人垂直平方线上,若DE12cm,则ABC的周长是 .

E 第15题图 B F B

D C 第16题图 E A C

三、解答题(一)(共3个小题,每小题6分,满分18分)

17. (6分)请你从下列各式中,任选两个式子作差,并将得到的式子进行因式分解。

4a2,(xy)2,1,9b2

18. (6分)化简:

19. (6分)如图,在平面直角坐标系中,直线l是第一、三象限的角平分线。

(1)由图观察易知点A(0,2)关于直线l的对称点A坐标为(2,0),请在图中分别标明点'a1a22 a2a1a2a1

B(5,3),C(2,5)关于直线l的对称点B',C'的位置,并写出它们的坐标:B' 、C';

(2)结合图形观察以上三组点的坐标,你发现:坐标平面内任一点P(a,b)关于第一、三象限的角平分线l的对称点P坐标为 。 '

A

A

’ B

C

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