当前位置:文档之家› 八年级下第三次月考

八年级下第三次月考

八年级下第三次月考
八年级下第三次月考

2012八年级下第三次月考试题(Unit6-8)

听力部分(30分)

I、听句子(本大题共5小题,每小题1分,共5分)

根据句子的内容和所提的问题,选择符合题意的图画回答问题,把最佳选项的字母编号写在题号前的括号内。每小题听两遍。

()1.What does the man want?

A B C

()2.How will the man go to work ?

A B C

()3. What is Lucy doing?

A B C

()4.Whom are they talking about?

A

A B C

()5.Which sign is talked about?

A B C

II、听对话,选择正确的答案。听两遍。(10分)

听第一段对话,回答第6题。

( ) 6.How long has Tom been watching TV this afternoon?

A.Three hours

B.Less than three hours C More than three hours

听第二段对话,回答第7-8题。

( ) 7.What’s the best gift the girl has ever received?

A.A piano B. A watch C.A guitar.

( ) 8. When did the girl get it?

A. On her fifth birthday

B. On her sixth birthday

C. On her fourth birthday

听第三段对话,回答第9-10题。

( ) 9. Does the boy think the scarf is boring?

A.Yes, he does B.No, he doesn’t C.We don’t know

( ) 10.What would the boy get his teacher?

A.A calendar B. Some flowers C. A hat

听第四段对话,回答第11小题。

( ) 11. When did Ted start to watch this TV play?

A. At 8: 15.

B. At 7:45.

C. At 7:15.

听第五段对话,回答第12—13小题。

( )12. Where does it probably happen?

A. In a school.

B. In an office.

C. In a shop.

( )13. What’s wrong with the T-shirt?

A.It is too small for the man.

B.It is too big for the man.

C.It is too dirty.

听第六段对话,回答第14—15小题。

( )14. Why doesn’t the girl want to get Tony CDs? Because she thinks they are .

A.not personal enough

B. not special enough

C. too expensive

( )15. What will the girl get Tony for his birthday?

A.A new photo album. B.A new dictionary. C.A new book

III、听短文(本大题共5小题,每小题1分,共5分)

在每小题给出的三个选项中,选出一个能完成句子的最佳选项,并将其字母编号写在题号前的括号内,本题听两遍。

( ) 16. What will they go to spend their holiday?

A. Sanya

B.Shanghai

C. Hongkong

( ) 17. What will they have in order to visit his aunt in Sanya?

A.Money

B.Time

C.Clothes

( ) 18. What can they do in Sanya?

A.Go swimming

B.Go boating

C. Go fishing.

( ) 19. What can they wear in Sanya in May?

A.Sweater

B.Coats

C.Skirts

( ) 20. Who will they phone to book the tickets?

A.Advertising agency

B.The travel agent

C. My friend

IV、听填信息(本大题共5小题,每小题2分,共10分)

下面你将听到一段有关老师对学生评价的短文。请你根据所听到的内容填写信息,本题听两遍。

笔试部分(90分)

一、选出与划线部分意思相近的选项(5分)

()26.Why not tell him the good news a little earlier?

A. What about B Why don’t you C .How about D. When

( ) 27.I’ll get you some drink right away.

A. just B right now C .in a minute D. just now

( )28. There is much water in the glass.

A. many

B. a lot of

C. some

D. little

( )29.I received a letter from my fen pal yesterday.

A. get a letter from B .heard of C. heard from D. write to

( )30.He is always running out of his money before payday.

A .run out B. set up C .setting up D. using up

二、单项选择题(20分)

()31. I _______ my food half an hour ago and it______ yet.

A. ordered, hasn’t arrived

B. has ordered, didn’t arrive

C. ordered. didn’t arrive

D. has ordered, hasn’t arrived

()32What will you do if you________ know the way to the zoo?

A. not

B. don’t

C. didn’t

D. won’t

()33 Why _______ a train to Beijing?

A. don’t you by

B. don’t you have

C. not take

D. not to take ()34. Her mother is ill, so she ______ look after her at home tomorrow.

A. has to

B. have to

C. is going to have to

D. must to ()35. What about _______ meat for lunch?

A. to buy some

B. buying some

C. to buy any

D. buying any ()36.Which is not an English-speaking country?

A. Australia

B. America

C. Canada

D. France

()37. We prefer to buy a new bike rather than _____ it.

A. repair

B. to repair

C. repairing

D. to repairing ()38. People don’t need to spend ____ money buying gifts.

A. too many

B. much too

C. too much

D. many too

()39. — Shall we go for a walk outside? -- ______ .

A. I would be

B.I like

C. I do

D. Good idea

()40. The drink is _______ delicious _______ I enjoy it very much.

A. too, to

B. so, that

C. such, that

D. too, that

()41. ——________ will the supper be ready? I’m hungry.

——In a minute.

A. How soon

B. How long

C. How much

D. How often ( )42. --When did you get the gift? -- _____ my _____ birthday.

A. In, sixth

B. On, sixth

C. On, six

D. In, six

( )43. What’s the best gift you ha ve ever ______?

A. received

B. to receive

C. receiving

D. be received

( )44. ______ lucky guy!

A. What

B. What a

C. How

D. How a

( )45 Do you know that is _____ grandmother.

A. a 80-year-old

B. 80 -years-old

C. an 80-year-old

D. 80 –year-old

( ) 46 ─did you play the piano today? ─ For five hours.

A. When

B. How long

C. How often

D. How soon

( ) 47 Thank you me the snow globe the monster.

A. to send, of

B. for sending, of

C. sent, from

D. to sends, from ( ) 48 Victor worked in this city for .

A. two year and a half

B. two and a half year

C. two years and half

D. two and a half years

( )49. --Why don’t you get the book?

--That’s ____.

A. not important enough

B. not enough important

C. enough not important

D. important not enough

( )50.Jim’s class is organizing a talent show to money for charity.

A. make

B. save

C. store

D. raise

三、完型填空(10分)

A.先通读短文,掌握其大意,然后从A、B、C、D四个选项中选出一个可以填入相应空白处的最佳答案,将其标号填入题前括号。(10分)

Mr. Tweed was a clever newspaper man. He worked 51 a good newspaper and he liked to argue with people very much. He argued with anybody and about anything. 52 He talked with clever people, but very often they were not 53 as he. He didn’t 54 to argue with foolish people. He knew he could never made them 55 their mind, because they couldn’t understand 56 he was saying. He found those foolish people were always sure 57 they were right, and they often said very interesting.

One day, Tweed 58 with a man. Of course the argument came to nothing. At last the man said, “Well, sir. You should never forget this, there are always three answers 59 every question, your answer, my answer and the correct answer.”

Tweed thought it was interesting and he never forgot 60 .

( )51. A. to B. with C. for D. about

( )52. A.Some time B.Sometime C. Some times D. Sometimes

( )53. A. clever B. the cleverest C. cleverer D. so clever

( )54. A. want B. mind C. think D. hope

( )55. A. to change B. change C. become D.to become

( )56. A. when B. if C. that D. what

( )57. A. that B. as C. because D. since

( )58. A. spoke B. asked C. told D. talked

( )59. A. at B. on C. to D. of

( )60. A. it B. these C. those D. them

四、阅读理解(30分)根据短文内容选出最佳答案。

A

The Farmer, His Horse, and His son

Once there was an old farmer, with a horse which was almost as old as himself. He set out one morning with his son to sell the horse before it died. Father and son walked, because the farmer did not want the horse to be too tired.

They met two men on the road who said, "Why are you walking, farmer? You have a horse, It's a long way to market. "The farmer know that this was true, so he rode on the horse, while his son walked.

Then they met two old women, "What are you doing up there, farmer? Can't you see how tired the boy is?" So the farmer got down, and his son rode instead.

Next, three old men stopped them, one said, "Why are you walking, farmer? Get up, It's too hot for an old man like you to walk today," So the farmer got up behind his son, and they rode on.

Some time later, a young woman passed them, "Why aren't you walking?" she asked, "It isn't far to the market. Give your poor horse a rest." So the farmer, and his son, got down once again. It is a fact that you cannot please all the people all the time.

()61. The farmer wanted to sell the horse ____.

A. before it was dead

B. before it become too tired

C. before it market was over

D. before it was as old as he was

()62. The two men on the road ____.

A. asked how far it was to the market

B. said they thought the horse looked very tired

C. asked why the farmer was not riding on his horse

D. told the farmer's son to get off the horse and walk

()63. The two old women said it was wrong for ____.

A. the farmer to ride such a tired horse

B. the farmer to ride while his young son walked

C. the boy to ride instead of his father

D. only one person to ride such a long way

()64. The farmer got up behind his son because ____.

A. the old man said it was too hot for him to walk

B. the three old men stopped them on the road

C. he did not know why he was walking

D. his son could not ride the horse by himself

()65 What do you learn from this story?

A.The farmer loved his horse.

B .We cannot please all the people all the time.

C.The farmer’s son loved his horse.

D. The farmer and his son were lazy.

B

Animals like to play, eat, sleep and kill other animals, because they need food. Some animals can live without eating for a moment, and others can live without water for a long time. The way animals live and eat forms a food chain.

A food chain works like this. When one animal eats a plant, and another animal eats that animal, and a human eats that animal, they form a food chain.

Animals are different in colors, shapes and sizes. Some example are birds, small fish, sea horses, and even humans. Yes, you and I are animals. But we are different, because we can think

and speak, and we can work hard with our hands.

( )66. From the passage we know _________ .

A. animals can live without eating anything

B. animals can live without drinking water

C. some animals kill other animals for food.

D. all the animals eat plants.

( )67. The writer tells that ________ .

A. animals are different in shapes and sizes.

B. animals are the same in shapes and sizes.

C. all the plants eat plants.

D. all the animals eat animals.

( )68. What is the “food chain” ?

A. 生物圈

B. 食物链

C. 生物循环

D. 食谱( )69.Humans are different from animals, because humans .

A. are stronger than animals.

B. can think and work.

C. can eat other animals.

D. are different in size from other animals.

(

A. A tiger eats grass and grass eats a horse.

B. A horse eats grass and a tiger eats a horse.

C. A horse eats grass and a tiger eats grass.

D. A horse eats a tiger and a tiger eats grass.

C

阅读下面短文,根据内容判断文后句子的正确(T)与错误(F)

If you do not use your arms or your legs for some time, they become weak; when you start using them again, they slowly become strong again. Everybody knows that. Yet many people do not seem to know that memory works in the same way.

When someone says that he has a good memory, he really means that he keeps his memory in practice by using it. When someone else says that his memory is poor, he really means that he does not give it enough chance to become strong.

If a friend says that his arms and legs are weak, we know that it is his own fault. But if he tells us that he has a poor memory, many of us think that his parents are to blame, and few of us know that it is just his own fault.

Have you ever found that some people can' t read or write but usually they have better memories? This is because they cannot read or write and they have to remember things; they cannot write them down in a little notebook. They have to remember days, names, songs and

stories; so their memory is the whole time being exercised.

So if you want to have a good memory, learn from the people: practise remembering.

( )71. The main reason for one's poor memory is that his parents have poor memories.

()72. If you don't use your arms or legs for some time, they will become strong.

()73. A good memory comes from more practice.

()74 Some people can't read or write, but they have better memories, because they have saved trouble.

()75. The best title of this passage is “How to Have a Good Memory”.

五、写作部分(25分)

一、用所给单词的适当形式填空。(每题1分,共5分)

76. The girl got a birthday cake on her ________(nine) birthday.

77. It’s ____________ (polite) to speak loudly in public.

78. I have two ________ (scarf). One is red, and the other one is blue.

79 Would you mind _______ (turn) down the TV.

80Why not ________ (leave) with us?

二、把句子中的汉语部分翻译成英语。(每题1分,共5分)

81.I don’t think it is polite to_______________ (插队)。

82.Dogs are too different to _______________ (照顾)。

83.She doesn’t like _________________ (排队等候)。

84.Sorry, I’ll do it _______________ (马上)。

85.I didn’t finish my test because I______________ time.(用完、用尽)。

三、VII. 书面表达: (15分)

后天是母亲的生日,你最后决定送她什么礼物?你能告诉我们你的理由吗?(词数70左右)

I、听句子根据句子的内容和所提的问题,选择符合题意的图画回答问题,每小题

听两遍。

1.M: Excuse me. I’d like two hamburgers , please.

2. W: Mr Black will go to work by bike instead of by bus.

3. M: Lucy is saying goodbye to her classmate

4. W: My English teacher has short hair , she wears glasses.

5. M: Excuse me, Sir, Cars are not allowed to park here.

II、听对话,选择正确的答案。每段对话听两遍。

听第一段对话,回答第6题

W: What are you doing now, Tom?

M: I’m watching TV.

W: How long have you been watching ?

M: I have been watching for more than three hours.

听第二段对话,回答第7-8题

M: What’s the best gift you have ever received?

W: A guitar.

M: Who gave it to you?

W: My mother.

M: And when did you get it?

W: On my fifth birthday.

听第三段对话,回答第9-10题

M: Teacher s’ day is coming. I want to buy my teacher a gift. Do you have any idea?

W: Why don’t you get her a scarf?

M: No, that’s too boring. I bought it for her last year.

W: Then how about a camera?

M: Oh, that’s too expensive.

W: What about a hat?

M: That’s a good idea.

听第四段对话,回答第11小题。

W: How long has Ted been watching this TV play?

M: Since 7:45.

听第五段对话,回答第12—13小题。

M: Excuse me. Can you show me another T-shirt?

W: What’s wrong, sir?

M: Yesterday I bought a T-shirt here. But it is too small for me. I need a bigger one. W: OK, I will show you a bigger one.

听第六段对话,回答第14—15小题。

W: Tomorrow is Tony’s birthday. But I don’t know what I should get him.

M: How about some CDs? I know he likes listening to music very much.

W: But CDs are not special enough.

M: Em…Oh, he loves reading books, too. So why not get him a new book?

W: A new book? Good idea! That’s personal.

III.听短文在每小题给出的三个选项中,选出一个能完成句子的最佳选项,并将其字母编号写在题号前的括号内。本题听两遍。

The Labor Day is coming. We will go travelling to South China, Sanya, if we have a week-holiday. My aunt lives in Sanya. We’ll visit her if we have time there. For this travel, my parents work hard to make money. I work hard to make my parents happy. Sanya is a beautiful city. It’s warm around May. Everywhere you can see flowers. We can wear skirts there not like our city. We can see the sea there and can swim in the sea. Tomorrow my parents will phone the travel agent to book the tickets for us. It’s really wonderful!

IV.听填信息你将听到的是一段有关招聘志愿者介绍.请你根据所听到的内容,填写有关信息,完成有关记录。本题听两遍。

Last week, I finished my end-of –year exams, and got my report card today. I am always nervous when I see the envelope from school in the mail , but luckily I did OK, My Chinese teacher said I was good at this subject. And my math was also good . So, my math teacher said I was hard-working. I was very happy. But my English teacher said I could do better. The most disappointing result was in physics . My physics teacher said I was lazy. I decided to work harder and get good grades next semester.

I、1—5 BACAA II、6—10 CCAAC III、11—15 BCABC 16—20 AAACB

IV、21. Chinese 22. hard-working 23. English 24. could 25. lazy

一26---30 B C B C D

二、31---35 A B C A B 36---40D A C D B 41---45 A B A B C 46---60 B B D A D

三、51—55 C D D A B 56—60D A D C A

四61—65 A C B A B 66—70 D D C B A 71—75F F T F T

76.ninth 77.impolitly 78scarfs/scarves 79.turning 80.leave

81. cut in line 82. take care of /look after/care for 83.waiting in line

84.right a way/in a minute/at once 85 ran out of

部编人教版八年级数学上册第三次月考答案

部编人教版八年级数学上册第三次月考答案 一.选择题(共10小题,满分30分,每小题3分) 1.(3分)计算3a2?a3的结果是() A.4a5B.4a6C.3a5D.3a6 【解答】解:3a2?a3=3a5. 故选:C. 2.(3分)一个三角形的两边长为3和8,第三边长为奇数,则第三边长为()A.5或7B.7或9C.7D.9 【分析】首先根据三角形的三边关系求得第三边的取值范围,再根据第三边又是奇数得到答案.【解答】解:根据三角形的三边关系,得 第三边大于8﹣3=5,而小于两边之和8+3=11. 又第三边应是奇数,则第三边等于7或9. 故选:B. 3.(3分)下列各式是完全平方式的是() A.16x2﹣4xy+y2B.m2+2mn+2n2 C.9a2﹣24ab+16b2D. 【解答】解:A、不是完全平方式,故本选项错误; B、不是完全平方式,故本选项错误; C、是完全平方式,故本选项正确; D、不是完全平方式,故本选项错误; 故选:C. 4.(3分)下列因式分解结果正确的是() A.x2+xy+x=x(x+y)B.﹣a2+4a=﹣a(a+4) C.x2﹣4x+4=(x+2)(x﹣2)D.x(x﹣y)+y(y﹣x)=(x﹣y)2 【解答】解:A、原式=x(x+y+1),故本选项不符合题意. B、原式=﹣a(a﹣4),故本选项不符合题意. C、原式=(x﹣2)2,故本选项不符合题意. D、原式=(x﹣y)2,故本选项符合题意. 故选:D.

5.(3分)下列运算中正确的是() A.x2?x2=2x4B.3x2+2x2=5x4 C.(﹣x2)3=﹣x6D.(x﹣2)2=x2﹣4 【解答】解:x2?x2=x4,故选项A不合题意; 3x2+2x2=5x2,故选项B不合题意; (﹣x2)3=﹣x6,故选项C符合题意; (x﹣2)2=x2﹣4x+4,故选项D不合题意. 故选:C. 6.(3分)若等式(a﹣2)3﹣2a=1成立,则a的值可能为() A.3或1或1.5B.3或1.5C.3或1D.1或1.5 【解答】解:当3﹣2a=0,即a=1.5时,等式(a﹣2)3﹣2a=1成立; 当a﹣2=1,即a=3时,等式(a﹣2)3﹣2a=1成立; 综上所述,当等式(a﹣2)3﹣2a=1成立,则a的值可能为3或1.5, 故选:B. 7.(3分)若(x2﹣px+q)(x﹣3)展开后不含x的一次项,则p与q的关系是()A.p=3q B.p+3q=0C.q+3p=0D.q=3p 【解答】解:(x2﹣px+q)(x﹣3)=x3﹣3x2﹣px2+3px+qx﹣3q=x3+(﹣p﹣3)x2+(3p+q)x﹣3q,∵结果不含x的一次项, ∴q+3p=0. 故选:C. 8.(3分)【分析】根据三角形的外角性质得出∠2=∠A+∠1,代入求出即可. 【解答】解: ∠2=∠A+∠1=30°+20°=50°, 故选:B. 9.(3分)如图,等边△ABC的边长为1cm,D、E分别AB、AC是上的点,将△ADE沿直线DE折叠,点A落在点A′处,且点A′在△ABC外部,则阴影部分的周长为()cm

八年级(上)第三次月考数学试卷

饶师实中-第一学期第三次月考八年级数学试题 班级:姓名:座号成绩: 一、选择题:(21 分) 1.下列图像不能表示y是x的函数的是() A B C D 2.下面哪个点在函数y= 1 2 x+1的图象上() A.(2,1) B.(-2,1) C.(2,0) D.(-2,0) 3.比较2.537 -,,的大小,正确的是() A.3 2.57 -<<B.2.537 <-< C.-37 2.5 <<D.7 2.53 <<- 4.函数y=ax+b与y=bx+a的图象在同一坐标系内的大致位置正确的是() A B C D 5.Rt90 ABC C BAC ∠∠ 在△中,=,的角平分线AD交BC于点D,2 CD=,则点D 到AB的距离是() A.1B.2 C.3 D.4 6.如图,数轴上A B ,两点表示的数分别是1和2,点A关于点B的对称点是点C,则点C所表示的数是() A.21-B.12 +C.222 -D.221-0 A B C

7.如图, AD 是ABC △的中线,E ,F 分别是AD 和AD 延长线上的点,且DE DF =,连结BF ,CE .下列说法:①CE =BF ;②△ABD 和△ACD 面积相等;③BF ∥CE ;④△BDF ≌△CDE .其中正确的有( ) A .1个 B .2个 C .3个 D .4个 二、填空题:(24分) 8. 函数2y x = -中自变量x 的取值范围是_______________ 9.在RT △ABC 中,已知∠C=90°,∠A=30°,AB=6cm, 则BC= 。 10. 若点(1,3)在正比例函数y=kx 的图象上,则此函数的解析式为 . 11. 计算:2 )4(3-+-ππ的结果是_____________ 12. 如果正数m 的平方根为1x +和3x -,则m 的值是 13. 已知点A(a ,–2) , B(b ,–4)在直线y=–x+6上,则a 、b 的大小关系是a_ ___b. 14. 已知直线y=x-3与y=2x+2的交点为(-5,-8),则方程组30 220x y x y --=??-+=? 的解是 _____ ___。 15.为了加强公民的节水意识,某市制定了如下收费标准:每户每月的用水量不超过10t 时,水价为每吨1.2元;超过10t 时,超过部分按每吨1.8元收费.该市某户居民5月份用水x(t)(x>10),应交水费y 元,则y 与x 的函数关系式为_____ _____. 三、解答题:一定要细心哟! 16.(7分)计算:(1) 3 1 804 + - ; (2)() () 2 432132-++-。 17.(6分)已知,函数()1321y k x k =-+-,试回答: (1)k 为何值时,图象交x 轴于点( 3 4 ,0)? (2)k 为何值时,y 随x 增大而增大? A D C B E F

上海市八年级上学期数学10月月考试卷

上海市八年级上学期数学10月月考试卷 姓名:________ 班级:________ 成绩:________ 一、单选题 (共10题;共20分) 1. (2分)(2016·姜堰模拟) 下列汽车标志中,既是轴对称图形又是中心对称图形的是() A . B . C . D . 2. (2分)(2016·岳阳) 下列长度的三根小木棒能构成三角形的是() A . 2cm,3cm,5cm B . 7cm,4cm,2cm C . 3cm,4cm,8cm D . 3cm,3cm,4cm 3. (2分)如果在△ABC中,∠A=60°+∠B+∠C,则∠A等于() A . 30° B . 60° C . 120° D . 140° 4. (2分)等腰三角形的一个角是48°,它的一个底角的度数是() A . 48° B . 48°或42° C . 42°或66° D . 48°或66° 5. (2分)等腰三角形一腰上的高线与底边的夹角等于() A . 顶角

B . 底角 C . 顶角的一半 D . 底角的一半 6. (2分)(2011·衢州) 如图,OP平分∠MON,PA⊥ON于点A,点Q是射线OM上的一个动点,若PA=2,则PQ的最小值为() A . 1 B . 2 C . 3 D . 4 7. (2分)如图,在?ABCD中,AC,BD为对角线,BC=6,BC边上的高为4,则阴影部分的面积为() A . 3 B . 6 C . 12 D . 24 8. (2分)下列各组条件中,能判定△ABC≌△DEF的是() A . AB=DE,BC=EF,∠A=∠D B . ∠A=∠D,∠C=∠F,AC=EF C . AB=DE,BC=EF,△ABC的周长= △DEF的周长 D . ∠ A=∠D,∠B=∠E,∠C=∠F 9. (2分)如图,△ABC中,∠C=90°,AD平分∠BAC,AB=5,CD=2,则△ABD的面积是()

人教版八年级英语上册月考试题

2012—2013年第一学期英语月考试题 听力部分(20分) 第一节听上句,从下面的A ,B ,C三个选项中选出适当答语,并把其标号填在题前括号内。(5分) ( )1. A. I have a headache . B. I have a bag. C. I don’t have a headache ( )2. A. I’m sorry to hear that. B. I’m glad to hear that. C. I’m happy to hear that. ( ) 3. A. You should go to bed late. B. You should wash hands before meals C. You should eat more junk food. ( ) 4.A. Eat bad food. B. Drink sour milk. C. Keep the air clean and fresh. ( ) 5.I’m not thirsty. B. It’s not yours. C. OK. Just a minute. 第二节听对话,回答问题,并把其标号填在题前括号内。(5分) ( ) 6. How often does Judy play cards? A. Once a week B. Every evening C. Never ( ) 7. What’s wrong with Peter? A. He has got a headache. B. He’s got a toothache. C. He’s quite well. ( ) 8. Why can’t Alan go hiking? A. He must finish his report. B. He must do his homework C. He must clean his room. ( ) 9.What language can’t Mr. Wang speak? A. Italian B. Chinese. C. French. ( ) 10. What can we know from the conversation? A. Tina likes baseball very much. B. Tina does sports and eats vegetables every day.. C. Maybe Tina is pretty healthy. 第三节根据所听内容选择正确答案。(5分) 听第一段对话,回答11—13三个小题。 ()11.Why didn’t John go to school? A. Because he was ill. B. Because he was late. C. Because he was busy. ( ) 12. Is John better now? A. Yes, he is. B. No, he isn’t. C.We don’t know. ( ) 13. Did John see the doctor? A. Yes, he did. B. No, and he won’t either. C. No, but he’s going to. 听第二段对话,回答14---15两个小题。 ()14.When will Laura go to the office? A. On Tuesday B. On Thursday C. On Friday ( ) 15.Why did Laura ask for leaving? A. Because he was ill. B. Because her father was ill.

人教版八年级数学上册第三次月考试题.doc

初中数学试卷 桑水出品 2012——2013八年级上第三次月考数学试题 一填空题(1—8题每小题3分,共24分) 1.若一个数的平方根等于它的立方根,则这个数是 . 2.等腰三角形的一个角是50°,则它的顶角是 . 3.在Rt △ABC 中,∠C=90°,AD 平分∠CAB ,BC=8,BD=5,则D 到直线AB 的距离是 . 4.已知函数()3232+-=-m x m y 是关于x 的一次函数,则m = . 5.一次函数)1(-+=k kx y 的图象经过第一、三、四象限,则k 的取值范围是 . 6. △ABC 中,AB=AC=30,∠BAC=150°,则△ABC 的面积是 . 7.直线4-=kx y 与两坐标轴所围成的三角形面积是4,则直线的解析式为 . 8.经过点A (-2,-1),且与直线32-=x y 平行的直线解析式为 . 二、选择题(9—16题,每小题3分,共24分) 9.已知点A (-4,1y )和点B (2,2y )都在直线22 1+-=x y 上,则1y 与2y 大小关系为( ) A. 1y >2y B. 1y = 2y C. 1y <2y D.不能比较. 10.下列说法正确的个数是( ) ①无理数就是开方开不尽的数,②无理数就是无限不循环小数,③ 无理数包括正无理数,零,负无理数,④无理数都可以用数轴上的点表示. A.0个 B.1个 C.2个 D.3个 11.负数a 和它的相反数的差的绝对值是( ) A.2a B.0 C.-2a D. ±2a 12.下列图象中,不能表示y 是x 的函数的是( ) 13.如图,三个正比例函数的图象对应的解析式为①y =a x ,②y =b x ,③y =c x ,则a 、b 、c 的大小关系是( ) A. a >b >c B. c >b >a C. b >a >c D. b >c >a 14.如图,已知△ABC ,AB=AC ,∠BAC=90°,直角∠EPF 的顶点P 是BC 中点,两边PE ,PF 分别交AB 、AC 于E 、F.下列结论:①AE=CF ,②∠APE=∠CPF ,③△EPF 是等腰直角三角形,④EF=AP ⑤S 四边形AEPF =2 1S △ABC .当∠EPF 在△ABC 内绕点P 旋转时(E 不与A 、B 重合).上述结论始终正确的有( ) A. ①②③④ B. ①②③⑤ C. ①②④⑤ D. ②③④⑤ 15.小亮早晨从家骑车到学校,先上坡后下坡,行程情况如图所示,若返回时上坡、下坡的速

人教版八年级物理(上册)第一次月考试卷(含答案)

哈弗教育第一次月考 八年级物理试题(A 卷) 本试卷共四个大题,28个小题,满分90分。考试时间(90分钟) 一、选择题(以下1-15小题,每小题只有一个正确的选项,请将正确答案填写在下面的表格内,每小题3分,共45分) 1、下列说法中正确的是( ) A .只要物体振动,就一定能听到声音 B .固体、液体、气体都能传播声音 C .宇航员们在月球上也可以直接用口语交谈 D .声音在固体、液体中比在空气中传播得慢些 2、如图所示,用悬挂着的乒乓球接触正在发声的音叉,乒乓球会多次被弹开。这个实验是用来探究( ) A .声音能否在真空中传播 B .声音产生的原因 C .音叉是否有弹性 D .声音传播是否需要时间 3、沿河四中“第三套全国中学生广播体操《舞动青春》现在开始……”,操场上各年级的同学们听到声音的强弱各不相同,这主要是因为响度跟( ) A.发声体的振幅有关 B.距离发声体的远近有关 C.发声体的振动频率有关 D.发声体的材料、结构有关 4、有一些动物活动时常常会竖起耳朵,并且还不时地转动着方向,这是为了( ) A .向其他动物示威 B .赶小虫 C .判断声源的方向和距离 D .寻找异性动物 5、将音叉敲响后,放入口中,先不接触牙齿,听听声音,再咬住音叉,听听声音,如图所示。下列说法正确的是( ) A .音叉尾部接触牙齿时,声音响些,是由于固体传声比空气强 B .音叉尾部接触牙齿时,声音弱些,因为那样会阻止音叉的振动 C .音叉尾部不接触牙齿时,声音强些,是因为空气传声强 D .音叉尾部不接触牙齿时,不能听到声音,是由于空气不能传声

6、我们坐在教室里听老师讲课,我们听不到回声的原因() A.老师讲课的声音太小。 B.回声太小,听不到 C.老师讲课的声音根本没有回声 D. 回声与原声混在一起 7、玻璃鱼缸中盛有金鱼,若轻轻敲击鱼缸的上沿,则会看到鱼立即受惊,这时鱼接收到声波的主要途径是() A.鱼缸-空气-水-鱼; B.空气-水-鱼; C.鱼缸-水-鱼; D.水-鱼. 8、日常生活中,在往水瓶内灌水时,可以通过听声音的方法判断水的多少.随着水面的上升,声音的( ).A.音调在降低B.音调在升高C.响度增加了D.响度减小了 9、根据图所给信息,判断下列说法正确的是 () A.蝙蝠可以发出频率为400Hz的声音 B.人能听到蝙蝠发出的所有频率的声音 C.人听觉频率范围比人发声频率范围要大 D.15Hz的声音只要振幅足够大,人耳是能听到的 10、为了探究声音的响度与振幅的关系,小明设计了如图所示的几个实验。你认为能够完成这个探究目的的是() 11、下面对老牛和蜜蜂的对话描述正确的是() A.蜜蜂飞行时发出的声音音调高,牛的叫声响度大 B.蜜蜂飞行时发出的声音音调低,牛的叫声响度小 C.蜜蜂飞行时发出的声音响度小,牛的叫声音调高 D.蜜蜂飞行时发出的声音响度大,牛的叫声音调低 12、如图所示,是声音输入到示波器上时显示的波形。以下说 法正确的是() A.甲和乙音调相同,乙和丙响度相 同 B.甲和乙音调相同,乙和丙音色相 同 C.甲和丁音调相同,乙和丙响度相同 D.甲、乙、丙、丁音调和响度都相同

初二数学上第三次月考试卷

初二数学上第三次月考试卷 初二数学月考试卷考试时间120分钟满分150分一、选择题下列各题所给答案中只有一个是正确答案.每小题3分共30分。题目1 2 3 4 5 6 7 8 9 10 答案1下列图形中既是轴对称图形又是中心对称图形的是 A B C D 2点A–24在A第一象限B第二象限C第三象限D第四象限3小明在外地从一个景点回宾馆在一个岔路口迷了路问了4个人得到下面四种回答其中能确定宾馆位置的是A离这儿还有3km B沿南北路一直向南走C沿南北路走3km D沿南北路一直向南走3km。4已知一次函数ykxb k0且b0则在直角坐标系内它的大致图象是 A B C D 5已知点-4y12y2都在直线y - 12 x2上则y1 y2大小关系是A y1 y2 B y1 y2 Cy1 y2 D 不能判断6在平面直角坐标系中将点A12的横坐标乘以-1纵坐标不变得到点A′则点A与点A′的关系是 A.关于x轴对称B.关于y轴对称 C.关于原点对称 D.将点A向x轴负方向平移一个单位得点A 7下列说法正确的是①对角线互相垂直且相等的平行四边形是正方形②平行四边形、矩形、等边三角形、正方形既是中心对称图形也是轴对称图形。③旋转和平移都不改变图形的形状和大小④底角是45°的等腰梯形高是h则腰长是h2。A. ①②③④B. ①②④ C. ①②③D. ①③④第2 页共6 页8顺次连接四边形各边中点组成的四边形是矩形则原四边形是A矩形B梯形C对角线互相垂直的四边形D对角线相等的四边形9下列语句叙述正

确的有个①横坐标与纵坐标互为相反数的点在直线y —x 上②点P20在y轴上③若点P的坐标为ab且ab0则P点是坐标原点④函数xy1中y随x的增大而增大A、1个B、2个C、3个D、4个10如图小亮在操场上玩一段时间内沿MABM的路径匀速散步能近似刻画小亮到出发点M的距离y与时间x之间关系的函数图象是二、填空题每空3分共42分11函数①y32x②yx34③yx1④y1x ⑤y2x ⑥y0.5x中属一次函数的有。只填序号12在□ABCD中若∠A3∠B则∠A ∠D 13在四边形ABCD中若AB∥CD则再从①ABCD②BC∥AD③BCAD④∠A∠B这四个条件中任选一个能使四 边形ABCD是平行四边形的选法有14如果一次函数ymlxm2-l是正比例函数则m的值是______________. 15一次函数y-3x6的图象与x轴的交点坐标是________ 与y轴的交点坐标是_______ 第 3 页共 6 页CyxOBA16如图DE是△ABC的中位线FG是梯形BCED的中位线如果BC8那么FG_______ 17梯形ABCD中AB∥CD∠A50°∠ B80°AB10CD4则BC 的长是___________ 18直线y kx b与y —3x 1平行且经过—23则k______ b______ 19坐标系中右边的图案是由左边的图案经过平移后得到的。左图中左、右眼睛的坐标分别是42、22右图中左眼的坐标是34则右图案中右眼的坐标是20某种储蓄的月利率是0.6存入100元本金则本息和本金与利息的和y元与所存时间x月之间的函数

2019-2020学年人教版八年级上册第三次月考数学试卷含答案

2019-2020学年度第一学期第三次学情检测 八年级数学试卷 (本卷总分120分时间100分钟) 一、选择题(本大题共10小题,每小题3分,共30分.在每小题所给出的四个选项中,只有一项是正确的) 1.16的算术平方根是() A.±4 B.﹣4 C. 4 D.±8 2.下列图案不是轴对称图形的是() A. B. C. D. 3.若等腰三角形的顶角为80°,则它的一个底角度数为() A. 20° B. 50° C. 80° D. 100° 4.下列四组线段中,可以构成直角三角形的是() A. 4,5,6 B. 2,3,4 C.,3,4 D. 1,,3 5.3184900精确到十万位的近似值为() A. 3.18×106 B. 3.19×106 C. 3.1×106 D. 3.2×106 6.若点P(a,a﹣3)在第四象限,则a的取值范围是() A. a<0 B. a>3 C.﹣3<a<0 D. 0<a<3 7.如图,已知BC=EC,∠BCE=∠ACD,如果只添加一个条件使△ABC≌△DEC,则添加的条件不能为() A. AB=DE B.∠B=∠E C. AC=DC D.∠A=∠D A. B. C. D. 8.如图,已知△ABC(AB<BC<AC),用尺规在AC上确定一点P,使PB+PC=AC,则下列选项中,一定符合要求的作图痕迹是() 9.已知∠AOB=30°,点P在∠AOB内部,P1与P关于OA对称,P2与P关于OB对称,则P1,O,P2三点构成的三角形是() A.直角三角形 B.钝角三角形 C.等腰三角形 D.等边三角形 10.在平面直角坐标系XOY中,A点的坐标为(6,3),B点的坐标为(0,5),点M是x轴上的一个动点,则MA+MB的最小值是()

上海市八年级上学期数学第一次月考试卷(五四学制)

上海市八年级上学期数学第一次月考试卷(五四学制) 姓名:________ 班级:________ 成绩:________ 一、单选题 (共10题;共20分) 1. (2分)(2016·呼和浩特) 某企业今年3月份产值为a万元,4月份比3月份减少了10%,5月份比4月份增加了15%,则5月份的产值是() A . (a﹣10%)(a+15%)万元 B . a(1﹣90%)(1+85%)万元 C . a(1﹣10%)(1+15%)万元 D . a(1﹣10%+15%)万元 2. (2分)(2018·平南模拟) 下列四个从左到右的变形中,是因式分解是的() A . (x+1)(x﹣1)=x2﹣1 B . (a+b)(m﹣n)=(m﹣n)(a+b) C . a2﹣8ab+16b2=(a﹣4b)2 D . m2﹣2m﹣3=m(m﹣2)﹣3 3. (2分) (2018七上·宜兴期中) 若a位同学按7个人一组,分成若干组,其中有一组少3个人,则共有组数() A . B . ﹣3 C . +3 D . 4. (2分)多项式3x+x3的公因式是() A . 3 B . x C . 3x D . x3 5. (2分) (2019七下·东台期中) 不能被()整除. A . 80 B . 81

C . 82 D . 83 6. (2分) (2019八下·青铜峡月考) 已知a<b,则下列不等式一定成立的是() A . a+3>b+3 B . 2a>2b C . ﹣a<﹣b D . a﹣b<0 7. (2分)下列因式分解正确的是() A . x2﹣4=(x+4)(x﹣4) B . x2+2x+1=x(x+2)+1 C . 3mx﹣6my=3m(x﹣6y) D . 2x+4=2(x+2) 8. (2分) (2019七上·普兰店期末) 如图,在长宽的一个长方形的场地的两边修一条公路,若公路宽为则余下阴影部分的面积是() A . B . C . D . 9. (2分)下列式子正确的是() A . (a+5)(a-5)=a2-5 B . (a-b)2 = a2-b2 C . (x+2)(x-3)=x2-5x-6 D . (3m-2n)(-2n-3m)=4n2-9m2 10. (2分)在一次数学竞赛中,竞赛题共有25道,每道题都给出4个答案,其中只有一个答案是正确的,选对得4分,不选或选错扣2分.规定得分不低于60分得奖,那么得奖者至少应选对() A . 18道题 B . 19道题 C . 20道题

最新人教版八年级上册英语第一次月考试卷及答案

人教版八年级上册英语第一次月考试卷 姓名成绩 笔试部分(100) I.【基础检测】(10) *根据句意和首字母或汉语提示写单词! 1). My grandfather has n_______ much to do in the evening, so he always goes to bed early. 2).John got ________(无聊的)and he left the cinema early. 3).Lily had a w___________ time at the party yesterday. 4).The small village is famous for its _____________(瀑布). 5).They often surf the __________(互联网) on weekends. 6).—What kind of dance are you learning? -- __________(摇摆) dance. 7). I went to many cities last year, s______ as Beijing, Shanghai and Shenzhen. 8). Most students like to talk with friends o________. 9).Do you know the r_______ of your math exam? 10).Lina visited lots of ____________(博物馆)in British last summer. II.单项选择(15) ( )21.–Where ____ you go _____ your trip last month? -- I went to the beach . A.did, on B. did, in C. do, at D. do, for ( )22. Do you want to go _____ in winter? A. to somewhere warm B. somewhere warm C. to anywhere warm D. anywhere warm ( )23. I called you yesterday, but _____ answered me. A. no B. no one C. anyone D. someone ( )24. She is here ____ me. A. because B. because of C. although D. though ( )25. It’s windy and cold outside, so we decided _____ outside. A. to go B. not go C. not to go D. don’t go

初二数学第三次月考试卷

~第一学期淮安市淮海中学 初二数学第三次月考试卷.12.20 命题人:张建华 审核人:丁海英 一、选择题:(每题3,共30) 1、下面的图形中,是中心对称图形的是( ) A . B . C . D . 2、25的平方根是( ) A .5 B-5 C 5± D 5±. 3、下列实数 010010001.0,1.0,3 ,4,8,3,323-π ….其中无理数共有( ) A .2个 B .3个 C .4个 D .5个 4、以a 、b 、c 三边长能构成直角三角形的是( ) A . a=1 ,b=2 ,c=3 B . a=32 ,b=42 , c=5 2 C .a=2,b=3,c=5 D .a=5 ,b=6,c=7 5、一次函数y=―x ―1不经过的象限是( ) A .第一象限 B .第二象限 C .第三象限 D .第四象限 6、如图,下列条件之一能使平行四边形ABCD 是菱形的为( ) ①AC ⊥BD ②∠BAD=90° ③AB=BC ④AC=BD A .①③ B .②③ C .③④ D .①②③ 第6题 第7题 第8题 7.如图,在△ABC 中,BC =8cm ,AB 的垂直平分线交AB 于点D ,交边AC 于点E ,△BCE 的周长等于18cm ,则AC 的长等于 ( ) A .12cm B .10cm C . 8cm D . 6cm 8、如图,□ABCD 的顶点坐标分别是A (0,0)、B (6,0)、C (7,3),则顶点D 的坐标是 ( )A .(3,1) B .(1,3) C .(2,3) D .(3,2) 9、已知∣x -2∣+ 3+y =0,则 点P (x,y )在直角坐标系中( ) A .第一象限 B .第二象限 C .第三象限 D .第四象限 A B C D 班级 初 二( ) 姓名 考号____________________ ……………………………………装………………………………订………………………………线…………………………………………

上海市八年级上学期数学第一次月考试卷

上海市八年级上学期数学第一次月考试卷 姓名:________ 班级:________ 成绩:________ 一、单选题 (共6题;共12分) 1. (2分) (2020七下·石狮期末) 下列四组长度的小木棒中,按首尾顺次连结能组成一个三角形的是() A . 1,2,3 B . 4,5,6 C . 3,4,12 D . 4,8,4 2. (2分)(2016·陕西) 如图,AB∥CD,AE平分∠CAB交CD于点E,若∠C=50°,则∠AED=() A . 65° B . 115° C . 125° D . 130° 3. (2分) (2019八上·温岭期中) 如图所示的仪器中,OD=OE,CD=CE.小州把这个仪器往直线l上一放,使点D,E落在直线l上,作直线OC,则OC⊥l,他这样判断的理由是() A . 到一个角两边距离相等的点在这个角的平分线上 B . 角平分线上的点到这个角两边的距离相等 C . 到线段两端点距离相等的点在这条线段的垂直平分线上 D . 线段垂直平分线上的点到线段两端点的距离相等 4. (2分)(2014·宜宾) 如图,将n个边长都为2的正方形按如图所示摆放,点A1 , A2 ,…An分别是正方形的中心,则这n个正方形重叠部分的面积之和是()

A . n B . n﹣1 C . ()n﹣1 D . n 5. (2分)如图,∠BAC=110°若MP和NQ分别垂直平分AB和AC,则∠PAQ的度数是() A . 20° B . 40° C . 50° D . 60° 6. (2分)下列条件中,不能判定两个三角形全等的是() A . 三条边对应相等 B . 两边和一角对应相等 C . 两角及其一角的对边对应相等 D . 两角和它们的夹边对应相等 二、填空题 (共8题;共11分) 7. (2分)(2019·花都模拟) 如图,边长为4的正六边形ABCDEF的顶点B、C分别在正方形AMNP的边AM、MN上,CD与PN交于点H,则HN的长为________ 8. (1分) (2020八上·林西期末) 如果一个多边形的内角和为1260o,那么从这个多边形的一个顶点引对角线,可以把这个多边形分成________个三角形. 9. (1分)如图所示的正方形网格(每个小正方形的边长为1)点A、B、C、D、E、F、G七个点在格点上,

人教版八年级上册数学第一次月考含答案

八年级数学第一次月考 时间:100分钟满分120分 一、选择题。(每题3分,共30分) 1.下列图形中,不是轴对称图形的是() B。C。AD.。 2、和点P(-3,2)关于y轴对称的点是() A.(3,2) B.(-3,2) C. (3,-2) D.(-3,-2) m的值等于(.若x+2(m-3)x+16是完全平方式,则31 2) 或-D.7 C.7 1A.或5 B.5 4.圆、正方形、长方形、等腰梯形中有唯一条对称轴的是() (A)圆(B)正方形(C)长方形(D)等腰梯形 33)b2b??2)((,那么这个多项式是()5、一个多项式分解因式的结果是 66664??4?44?bbb?b B、、A、D、C6.下列长度的三条线段,能组成等腰三角形的是() (A) 1,1,2 (B) 2,2,5 (C) 3,3,5 (D) 3,4,5 4x?1得(7、分解因式) 2222)11)(x?(x?)?1?1)(xx(、 B 、A23(x?1)(x?1x?1)(x?1)()x?1)( C 、D、8.已知∠AOB=45°,点P在∠AOB内部,P与P关于OB对称,P与P关于OA对称,21则P,O,P 三点构成的三角形是 ( ) 21(A)直角三角形 (B)等腰三角形 (C)等边三角形 (D)等腰直角三角形9.如果一个三角形两边的垂直平分线的交点在第三边上,那么这个三角形是( )(A)锐角三角形.(B)直角三角形.(C)钝角三角形.(D)不能确定.m 10、如图,如果直线m是多边形ABCDE的对称轴,A E 其中∠A=130°,∠B=110°,)那么,∠BCD的度数等于(D B 、40° B、50° A C、60° D、70°C 分)3二.填空题(每题分,共3032a?ab分解因式的结果是、多项式1 242?y?16?49x())(2、?7050?。AD3.在

苏科版八年级上学期第三次月考数学试题

苏科版八年级上学期第三次月考数学试题 一、选择题 1.摩托车开始行驶时,油箱中有油4升,如果每小时耗油0.5升,那么油箱中余油量y (升)与它工作时间t (时)之间函数关系的图象是( ) A . B . C . D . 2.如图,△ABC ≌△ADE ,∠B=20°,∠E=110°,则∠EAD 的度数为( ) A .80° B .70° C .50° D .130° 3.如图,在△ABC 中,AB="AC," AB +BC=8.将△ABC 折叠,使得点A 落在点B 处,折痕DF 分别与AB 、AC 交于点D 、F ,连接BF ,则△BCF 的周长是( ) A .8 B .16 C .4 D .10 4.已知直角三角形纸片的两条直角边长分别为m 和()n m n <,过锐角顶点把该纸片剪成两个三角形.若这两个三角形都是等腰三角形,则( ) A .22320m mn n -++= B .2220m mn n +-= C .22220m mn n -+= D .2230m mn n --= 5.已知:△ABC ≌△DCB ,若BC=10cm ,AB=6cm ,AC=7cm ,则CD 为( ) A .10cm B .7cm C .6cm D .6cm 或7cm 6.若2149 x kx ++是完全平方式,则实数k 的值为( )

A.4 3 B. 1 3 C. 4 3 ±D. 1 3 ± 7.如图,在放假期间,某学校对其校内的教学楼(图中的点A),图书馆(图中的点B)和宿含楼(图中的点C)进行装修,装修工人需要放置一批装修物资,使得装修物资到点A,点B和点C的距离相等,则装修物资应该放置在() A.AC、BC两边高线的交点处 B.在AC、BC两边中线的交点处 C.在A ∠、B两内角平分线的交点处 D.在AC、BC两边垂直平分线的交点处 8.已知:如图,∠1=∠2,则不一定能使△ABD≌△ACD的条件是() A.AB=AC B.BD=CD C.∠B=∠C D.∠BDA=∠CDA 9.如图,若BD是等边△ABC的一条中线,延长BC至点E,使CE=CD=x,连接DE,则DE 的长为() A. 3 2 x B.23x C. 3 3 x D3x 10.变量x与y之间的关系是y=2x+1,当y=5时,自变量x的值是() A.13 B.5 C.2 D.3.5 11.已知:如图,在△AOB中,∠AOB=90°,AO=3cm,BO=4cm,将△AOB绕顶点O,按顺时针方向旋转到△A1OB1处,此时线段OB1与AB的交点D恰好为AB的中点,则线段B1D的长度为()

最新人教版八年级数学上册第三次月考试题

人教版八年级数学上册 第三次月考试题 一、选择题(每小题3分,共36分) 1.以下四家银行的标志图中,不是轴对称图形的是() A.B.C.D. 2.下列运算中正确的是() A.x2÷x8=x﹣4B.a?a2=a2C .(a3)2=a6D.(3a)3=9a 3 3.能使分式值为0的x值为() A.B.C.D. 4.下列各式由左边到右边的变形中,是因式分解的是() A.2xy+6xz+3=2x(y+3z)+3 B.(x+6)(x﹣6)=x2﹣36 C.﹣2x2﹣2xy=﹣2x(x+y)D.3a2﹣3b2=3(a2﹣b2) 5.以下列各组线段为边,能组成三角形的是() A.1cm,2cm,4cm B.4cm,6cm,8cm C.5cm,6cm,12cm D.2cm,3cm,5cm 6.如图所示,是用直尺和圆规作一个角等于已知角的示意图,则说明∠A′O′B′=∠AOB的依据是() A.SAS B.SSS C.AAS D.ASA 7.已知等腰三角形的一个内角为50°,则这个等腰三角形的顶角为()A.50°B .80°C.50°或80°D.40°或65°8.如果把中的x和y都扩大到5倍,那么分式的值() A.扩大5倍B.不变C.缩小5倍D.扩大4倍 9.已知x2﹣2kx+36是一个完全平方式,则k的值是() A.±6 B.±3 C.6 D.﹣6 10.如图,在△ABC中,∠B=∠C=60°,点D在AB边上,DE⊥AB,并与AC边交于点E.如果AD=1,BC=6,那么CE等于() A.5 B.4 C.3 D.2 11.如图,AD是△ABC的角平分线,∠C=20°,AB+BD=AC,将△ABD沿AD所在直线翻折,点B在AC边上的落点记为点E.那么∠B等于() A.80°B.60°C.40°D.30° 12.如图,已知,BD为△ABC的角平分线,且BD=BC,E为BD 延长线上的一点,BE=BA.下列结论:①△ABD≌△EBC;②∠BCE+∠BCD=180°;③AD=AE=EC;④AC=2CD.其中正确的有()个. A.1 B.2 C.3 D.4

2020年上海外国语中学八年级(上)第一次月考数学试卷

月考数学试卷 题号一二三四总分 得分 一、选择题(本大题共6小题,共12.0分) 1.若x=1是方程ax2+bx+c=0的解,则() A. a+b+c=1 B. a-b+c=0 C. a+b+c=0 D. a-b-c=0 2.对任意实数a,下列等式成立的是() A. =a B. C. =-a D. =a2 3.若a=1-,b=-,则a与b的关系是() A. 互为相反数 B. 相等 C. 互为倒数 D. 互为有理化因式 4.下列方程中,没有实数根的是() A. x2-2x=0 B. x2-2x-1=0 C. x2-2x+1=0 D. x2-2x+2=0 5.解关于x的方程(1-)x2+mx-(+1)=0时,得到以下四个结论,其中正确的是 () A. m为任意数时,方程总有两个不相等的实数根 B. m为任意数时,方程无实数根 C. 只有当m=2时,方程才有两个不相等的实数根 D. 当m±2时,方程有两个相等的实数根 6.如果三角形的两边长分别是方程x2-8x+15=0的两根,那么这个三角形的周长可能是 () A. 17 B. 14 C. 10 D. 9 二、填空题(本大题共12小题,共36.0分) 7.计算:= ______ . 8.计算:=______. 9.计算:=______. 10.已知a>0,计算:=______. 11.下列方程中,①7x2+6=3x;②=7;③x2-x=0;④2x2-5y=0;⑤-x2=0中是一元二次 方程的有______ . 12.方程x2-x-6=0的解为______. 13.在实数范围内分解因式:2x2-6=______. 14.原价为500元的商品经过连续两次降价后的价格为356元,设这两次降价的百分率 为x,那么可得方程为______. 15.为创建“国家生态园林城市”,某小区在规划设计时,在小区中央设置一块面积为 1200平方米的矩形绿地,并且长比宽多40米.设绿地宽为x米,根据题意,可列方程为____. 16.已知两个数的差为3,它们的平方和等于65,设较小的数为x,则可列出方程______. 17.若关于x的一元二次方程mx2-2x+3=0有两个实数根,则实数m的取值范围是 ______.

新人教版八年级上册数学月考试题

③ ② ① 月考试卷 1、下列命题中正确的是() A.全等三角形的高相等 B.全等三角形的中线相等 C.全等三角形周长相等 D.全等三角形的角平分线相等 2、如图,直线a、b、c表示三条公路,现要建一个货物中转站,要求它到三条公路的距离相等,则可供选择的地址有() A.一处 B.两处C.三处 D.四处 3、如图,△ABC中,AB=AC,AD⊥BC,点E、F分别是BD、DC的中点,则图中全等三角形共有() A.3对B.4对C.5对 D.6对 4、如图,某同学把一块三角形的玻璃不小心打碎成了三块,现在要到玻璃店去配一块完全一样的玻璃,那么最省事的办法是() A.带①去 B.带②去 C.带③去 D.带①和②去 5.下面4个汽车标志图案中,不是轴对称图形的是() A B C D 6.已知等腰三角形的一个外角等于100°,则它的顶角是(). A 80° B 20° C 80°或20° D 不能确定 7.小明从镜子中看到对面电子钟示数如图所示,这时的时刻应是()A.21:10 B.10:21 C.10:51 D.12:01 8、已知等腰三角形的一个外角等于100,则它的顶角是() A、80° B、20° C、80°或20° D、不能确定 c a b C F E D B A (第12题图)(第13题图)(第14题图)

9、如图,在△ABC 中,AB =AC =20cm ,DE 垂直平分AB ,垂足为E ,AC 于D ,若△DBC 的周长为35cm ,则BC 的长为( ) A 、 5cm B 、10cm C 、15cm D 、17.5cm 10、在直角坐标系中,A (1,2)点的纵坐标乘以-1,横坐标不变,得到B 点, 则A 与B 的关系是( ) A 、关于x 轴对称 B 、关于y 轴对称 C 、关于原点轴对称 D 、不确定 二.填空题 11.等腰三角形的一个角是80°,则它的底角是____. 12 如图9在等腰Rt △ABC 中,∠C =90°,AC =BC ,AD 平分∠BAC 交BC 于D ,DE ⊥ AB 于D ,若AB =10,则△BDE 的周长等于____. 13.点M (-2,1)关于x 轴对称的点N 的坐标是________,直线MN 与x?轴的位置关系是 14.已知,AD 是△ABC 中BC 边上的中线,若AB=2,AC=4,则AD 的取值范围是___________. 15.如图10,如在平面上将△ABC 绕B 点旋转到△A ’BC ’的位置时,AA ’∥BC ,∠ABC=70°, 则∠CBC ’为________度. 16.等腰三角形的周长是10,腰长是x ,则x 的取值范围________ 17.试找出如图所示的每个正多边形的对称轴的条数,并填在下表格中. 正多边形的边数 3 4 5 6 7 8 对称轴的条数 根据上表,请就一个正n 边形对称轴的条数作一猜想.n 边形有_______对称轴。 18.如图11所示,在△ABC 中,∠ABC=?100,∠ACB=?20, CE 平分∠ACB ,D 为AC 上一点,若∠CBD=?20,BD=ED , 则∠CED 等于_______ 19.如图12,已知ABC △的周长是21,OB OC ,分别平分∠ABC 和∠ACB ,OD ⊥BC 于D ,且 OD =3,△ABC 的面积是._______ 20.如图5在Rt ΔABC 中,∠C=90°,BD 是∠ABC 的平分线,交于点D ,若CD=n ,AB=m , 则ΔABD 的面积是_______ A B C D E (第10题) A

相关主题
文本预览
相关文档 最新文档