人教版七年级英语上册期末试卷及答案
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七年级上册期末真题试卷_七年级上册期末真题试卷小四门
人教版七年级英语上册期末试卷题目
一. 听力测试。
第一节. 选出你所听到的内容。(5分)
( )1. A. dog B. map C. desk
( )2. A. bag B. book C. box
( )3. A. chair B. table C. bed
( )4. A. know B. not C. notebook
( )5. A. phone B. hat C. map
第二节. 听 句子 ,选择佳答语。句子读一遍(5分)
( ) 6. A. It’s blue. B. They’re black. C. Please ask Li Lei.
( ) 7. A . That sounds interesting. B. Yes, it’s a computer game. C. Join us soon.
( ) 8. A. Carrots and eggs. B. TV and apples. C. Ping-pong.
( ) 9. A. No, it isn’t. B. No, he isn’t. C. No, she isn’t.
( )10. A It’s boring. B. No, it’s difficult. C. Yes, they do.
第三节.对话听,选择正确答案。念两遍(10分)
听第一段对话,回答11-12小题
( )11.______ has a baseball bat
A.Jim B.Bill C.Tom
( )12.Jim’s baseball is _____ .
A.on the sofa B.under the table C.in his bag
听第二段对话,回答13-14小题
( )13.These pencils are ______
A.Anna’s B.Bob’s C.Jenny’s
( )14.Jenny’s pen is _____
A.yellow B.blue C.green
听第三段对话,回答15-17小题
( )15.Anna is ______
A.Alice’s friend B.Frank’s friend C.Ali ce’s cousin
( )16._____ last name is Brown.
A.Alice’s B.Anna’s C.Frank’s
( )17._____ pen is green.
A.Alice’s B.Anna’s C.Frank’s
听第四段对话,回答18-20小题
( )18.Bob can play _______
A.soccer B.volleyball C.ping-pong
( )19.Bob plays with _______.
A.Bill B.his clasate C.friends
( )20._____ can play soccer _______ only watches volleyball on TV
A. Bill, Bob B. Bob ,Bill C. Bill, Bill’s clasate
第四节.择正确答案。短文读听短文选两遍。(5分)
( )21. __________ has a great sports collection.
A. My father B. My grandfather C. My uncle
( )22. He loves ____________ very much.
A. sports B. balls C. A and B
( )23. He likes playing ____________ and ___________.
A. volleyball, baseball B. volleyball, basketball C. basketball, baseball
( )24. He has __________ tennis rackets.
A. 5 B. 12 C. 10
( )25. He has _________ soccer balls.
A. 5 B. 12 C. We don’t know
笔试部分
二.单项选择(本题有15小题,每小题1分,共15分)
( )26. Bananas(香蕉) are _______ or _________.
A. yellow, red B. yellow, green C. orange, black D. green, white
( )27. That’s Bob White. We can call him .
A.Mr.Bob B. White C. Mr. White D. Ms Bob
( )28.—Mum, _______ is my friend, Jim. –Nice to meet you.
A. that B. this C. he D. it
( )29. ________ your keys, Jim.
A. Here is B. That’s C. It is D. Here are
( )30.---Your bedroom looks very nice!.
--- __________.
A. Thank you B. Oh, no C. No, don’t say so D. You’re welcome
( )31. Let help you.
A. they B. their C. his D. them
( )32. Li Fei can spell computer, ________ I can’t.
A. but B. and C. about D. because
( )33.—Mike, like eating ice cream?
—Yes, very much.
A. does he B. is he C. can you D. do you
( )34. I need(需要)my watch. Can you _______ it to me?
A. spell B. bring C. call D. take
( )35. —___________?
—B-A-S-E-B-A-L-L.
A. What’s that B. Is this your baseball
C. How do you spell baseball D. Can you spell it
( )36. ________ your balls, Jim.
A. Where is B. That’s C. It is D. Where are
( )37.--- Their _______ are in the bookcase.
A. dictionary B. dictionaries C. dictionarys D. watchs
( )38. De and I _______ good friends.
A. is B. are C. am D. am not
( )39. He’s Mary’s ________, her mother’s brother.
A. friend B. father C. cousin D. uncle
( ) 40.—Let’s play ping-pong.
—No, it’s ________. I want to watch TV.
A. interesting B. relaxing C. boring D. exciting
三.完形填空.(15分)
AJane is 41 English girl. She is a student. She 42 sports. She has a brother. 43 name is Jack. He likes sports ,too.They are in the same school .They play sports 44 . They he a nice house(房子) and a happy 45 .
( ) 41. A. a B. an C. the
( ) 42. A. like B.is C. likes
( ) 43.A. His B. Her C. He
( ) 44.A. every night B. every day C. in the classroom
( ) 45.A. house B. family C. class
BHello , everyone . My name is Ted . I like (喜欢) 46 very much and I often play sports with my friends after school . We play many kinds (种类) of 47 games . We all like playing 48 . We all he soccer balls . My friend Jack likes volleyball very much . He has four 49 . My friend Tim likes ping-pong and he can play it very 50 . He 51 six ping-pong balls . I like all the ball games 52 I can't play them all . I he a great 53 collection(收集) . I he four baseballs , seven tennis rackets , and two basketballs . There are 54 sports clubs in our school . We like 55 very much .
( )46. A. sports B. game C. English
( )47.A. balls B. ball C. school
( )48.A. basketball B. soccer C. baseball
( )49.A. volleyballs B. volleyball C. basketball
( )50.A. well B. good C. nice
( )51.A. he B. has C. is
( )52.A. and B. but C. so
( )53.A. sports B. class C. school
( )54.A. no B. a C. many(许多)
( )55.A. them B. it C. we
四、阅读理解(30分)
AThis is a picture of Bill’s family. The man in a black car is Mr Read. He’s in his car. The woman is in the car,too. She is in a yellow sweater. She’s a worker. Mr and Mrs Read he a son and two daughters . Their son, Bill, is on a bike. He’s in a blue coat. His sister, Ann, is a teacher. She’s not here. She’s at school. Sue is Bill’s sister, too. She is behind her father’s car. She has a nice cat. It’s black and white. Look, it is on the car.
( )56. Mr Read’s car is________.
A. red B. blue C. black D. white
( )57. Who’s Bill’s mother?
A. The one on the bike B. The one in Bill’s car.
C. The one behind the car. D. The one in a sweater.
( )58. How many people can you see in the picture?
A. Two B. Three C. Four D. Five
( )59. Who’s a school teacher?
A. Bill’s father. B. Bill’s mother.
C. Sue’s brother. D.Bill’s sister.
( )60. Where can you see a cat?
A. In the bike. B. On the car. C. In the car. D. On the bike.
BHer are my three photos.
This is my friend,Wu Huan.She is a good girl.She is 11 years old.She is in ChongQing with her family.She likes vegetables and chicken.She doesn’t like ice cream or strawberries.
This is me.My name is Chen Ming. I am 12 years old.I am a middle school student in Suzhou.I like eating fruit and vegetables.But I don’t like eggs or carrots.
This is my friend,too.His name is Doudou. He is in Suzhou with me.He likes bones( 骨头 ). He doesn’t like broccoli.He likes playing with balls.He is a nice dog!
( )61.How many friends does Chen Ming he?
A. one B. two C.three D. Four
( )62.Where is Wu Huan?
A. In ChongQing B. In Suzhou C. In Hangzhou D. In Wuhan
( )63.Doudou likes_________.
A. ice cream B. bones C. broccoli D. eggs
( )64.Which sentence is true?
A. Wu Huan is 12 years old. B. Doudou is Wu Huan friend.
C. Doudou is a nice boy. D. Chen Ming and Wu Huan likes vegetabl es
( )65.Which is the best title( 标题 ) of the text?
A. My friend and I B. My family
C. My dog and I D. My three photos
CNancy is an English school girl. She studies(学习) in a middle school. She has a little brother. His name is John. John is only four. Nancy likes him very much.Today is Sunday. Nancy wants to do her homework. She takes out(拿出)her pencil-box and opens it. “Oh, dear! Where’s my pen? “ She can’t find her pen. She goes to ask her brother in his bedroom.
“John! I can’t find my pen. Can you see. . . Oh, what are you doing with my pen?”
“I’m writing(写信)to my friend, Peter.” John answers.
“But how can you? You don’t know how to write!”
“It doesn’t matter.(没关系) Peter can’t read.” John says.
( )66.How old is Nancy’s brother?
A.Five B.Four C.Six D.Three
( )67.________ can’t find her pen.
A.Nancy B.Peter C.John D.Friend
( )68.Where’s John?
A.In the school.B In a shop C In his bedroom. D In her father’s car.
( )69.Which is not right?
A.Nancy finds her pen in John’s room. B.John can’t write.
C.John is writing with her sister’s pen. D.Peter can read.
( )70.John and Peter are ________.
A.friends B.English C.at home D.school girls
五,选词填空。(10分)
Where don’t tidy are always
71. My sister, Anna __________ has a good time at school.
72. My room is ______ , but Gina’s is not.
73. _______ is my ruler?
74. The keys __________ on the dresser.
75. Sorry, I _______ know.
六,完形填词.(10分)
Hello! My name is Mike. I am from the USA. Now I’m in China with my p76. I like China. I like Chinese food, too. I he b77 at home. I eat eggs, b78 and bananas. I don’t l79 milk. I he no time(时间) to go home for lunch. So I he it at school. The lunch in our school is good. I can he different(不同的) f 80 for lunch. I eat r 81, meat and vegetables. Sometimes(有时) I he noodles and dumplings. I he dinner at home w82 my parents. W83 he fish(鱼), meat(肉), vegetables, and f84. Sometimes we go out to e85 with our friends.
七、书面表达(共1小题,共计15分)
假设你是Linda, 请根据表格提供的信息,可适当补充,写一篇短文介绍自己,
文章 50词左右。
Name Linda Green
Age thir
Family father, mother, brother(Tony) and Linda
Forite color:white food:salad sport:baseball
Bedroom big, schoolbag (on the table), books(on the bookshelf)
...... ........
听力录音稿及参
第一节. 选出你所听到的内容。
1. Where is the map?
2. The book is on the desk.
3. Is the pen on the bed?
4. I don’t know.
5. Where is my phone?
第二节.听句子,选择佳答语。句子读一遍。
6. What color are your jackets?
7. Let’s play computer games.
8. What do they he for lunch?
9. Is this your sister?
10. Do you like playing table tennis?
第三节.对话听,选择正确答案。念两遍(10分)
听第一段对话,回答11-12小题
. W:Do you he a baseball?
M:Yes, I do. It’s in my bag.
W:Where’s your baseball bat?
M:Oh, I don’t he a baseball bat. But Bill has one.
听第二段对话,回答13-14小题
W:Hi, Anna. Are these your pencils?
M:No, they’re Bob’s.
W:And is this his green pen?
M:No, it isn’t. The blue pen is his.
W:What about the yellow one?
M:It’s Jenny’s
听第三段对话,回答15-17小题
.M:Hi, Alice. Who’s that girl?
W:She’s my friend Anna. She is Frank’s cousin.
M:What’s Anna’s family name?
W:Brown.
M:Is this your pen, Alice?
W:No, it isn’t. My pen is green.
听第四段对话,回答18-20小题
W:Can you play soccer, Bob?
M:No, I think it’s difficult. But Bill can play it.
W:Do you like volleyball
M:Yes, but I don’t play it. I only watch it on TV.
W:Do you like ping-pong?
M:Yes. I play it with my clasates after school.
第四节.择正确答案。短文读听短文选两遍。(5分)
My uncle has a great sports collection. He loves sports very much. And he loves all balls. He likes playing basketball and volleyball. He also likes watching ball games. How many balls does he he? He has 5 basketballs, 12 baseballs, 10 tennis rackets, 4 volleyballs and 14 baseball bats and many other balls.
人教版七年级英语上册期末试卷参
1-5 BBCAA 6~10 BAACB
11-15 BCBAA 16-20BACBA 21~25 CCBCC
26-40 BCBDA DAABC DBBDC
41-55 BCABB ABBAA BBACA
56-70 CDDDB BABDD BACDA
71-75 always tidy Where are don’t
76-85 parents breakfast bread like food
七年级数学试卷及答案 [人教版七年级上册数学期末试卷及答案]
努力造就实力,态度决定高度。祝你七年级数学期中考试成功!下面是我为大家整编的人教版七年级上册数学期末试卷,大家快来看看吧。
人教版七年级上册数学期末试题
一、选择题。(下列各题均有四个答案,其中只有一个是正确,共10个小题,每小题3 分,共 30 分)
题号 1 2 3 4 5 6 7 8 9 10
选项
1.﹣6的是()
A.6 B.﹣6 C.±6 D.
2.新亚欧大陆桥东起太平洋西岸连云港,西达大西洋东岸荷兰鹿特丹等港口,横贯亚欧两大洲中部地带,总长约为10900公里,10900用科学记数法表示为()
A.0.109×105 B.1.09×104 C.1.09×103 D.109×102
3.计算﹣32的结果是()
A.9 B.﹣9 C.6 D.﹣6
4.如图1是每个面上都有一个汉字的正方体的一种展开图,那么在正方体的表面与“生”相对应的面上的汉字是()
A.数 B.学 C.活 D.的
5.某课外兴趣小组为了解所在地区老年人的健康状况,分别作了四种不同的抽样调查.你认为抽样比较合理的是()
A.在公园调查了1000名老年人的健康状况
B.在医院调查了1000名老年人的健康状况
C.调查了10名老年邻居的健康状况
D.利用派出所的户籍网随机调查了该地区10%的老年人的健康状况
6.下面合并同类项正确的是()
A.3x+2x2=5x3 B.2a2b﹣a2b=1 C.﹣ab﹣a b=0 D.﹣y2x+xy2=0
7.如图2,已知点O在直线AB上,CO⊥DO于点O,若∠1=145°,则∠3的度数为()
A.35° B.45° C.55° D.65°
8.下列 说法中错误 的是()
A. 的系数是 B.0是单项式
C. 的次数是1 D.﹣x是一次单项式
9.某商品的标价为132元,若以9折出售仍可获利10%,则此商品的进价为()
A.88元 B.98元 C.108元 D.118元
10.如果A、B、C三点在同一直线上,且线段AB=6cm,BC=4cm,若M,N分别为AB,BC的中点,那么M,N两点之间的距离为()
A.5cm B.1cm C.5或1cm D.无法确定
得分 评卷 人
二、填 空题,(共8个小题,每小题4分,共32分)
11.如果零上2℃记作+2℃,那么零下5℃记作℃.
12.若3x2k﹣3=5是一元一次方程,则k=.
13.若2a2bm与﹣ anb3是同类项,则nm=.
14.已知a2+|b+1|=0,那么(a+b)2015的值为.
15. 一条直线上有n个不同的点,则该直线上共有线段条.
16.如图,已知点O在直线AB上,∠1=65°15′,∠2=78°30′,则∠1+∠2=,∠3=.
17.小明与小刚规定了一种新运算△:a△b=3a﹣2b.小明计算出2△5=﹣4,请 你帮小刚计算2△(﹣5)=.
18.若a,b互为相反数,且都不为零,则(a+b﹣1)( +1)的值为.
三、解答题(共38分)
19.(每小题5分,共10分)计算(1)(﹣6)2×[﹣ +(﹣ )]
(2)0﹣23÷(﹣ 4)3﹣
20.(每小题5分,共10分)解方程
(1)4x﹣3=﹣4 (2) (1﹣2x)= (3x+1)
21.(8分)化简:3b+5a﹣[﹣(2a﹣4b)﹣( 3b+5a)]
22.(10分)某校为了解九年级学生体育测试情况,以九年级(1)班学生的体育测试成绩为样本,按A,B,C,D四个等级进行统计,并将统计结果绘制成如下的统计图,请你结合图中所给信息解答下列问题:
(说明:A级:90分~100分;B级:75分~89分;C级:60分~74分;D级:60分以下)
(1)请把条形统计图补充完整;
(2)扇形统计图中D级所在的扇形的圆心角度数是多少?
(3)若该校九年级有600名学生,请用样本估计体育测试中A级学生人数约为多少人?
B卷
23.(8分)先化简,再求值:2(a2b+ab2)﹣2(a2b﹣1)﹣ab2﹣2.
其中a=1,b=﹣3.
24.(8分)解方程: .
25.(10分)如图,已知点M是线段AB的中点,点N在线段MB上,MN= AM,若MN=3cm,求线段AB和线段NB的长.
26.(12分)如图,直线AB,CD相交于点O,OA平分∠EOC.
(1)若∠EOC=70°,求∠BOD的度数;
(2)若∠EOC:∠EOD=2:3,求∠BOD的度数.
27.(12分)某校七年级实践小组去商场调查商品销售情况,了解到该商场以每件80元的价格购进了某品牌衬衫500件,并以每件120元的价格销售了400件,商场准备采取促销措施,将剩下的衬衫降价销售.请你帮商场计算一下,每件衬衫降价多少元时,销售完这批衬衫正好达到盈利45%的预期目标?
人教版七年级上册数学期末试卷参
一、 选择题:(30分)
题号 1 2 3 4 5 6 7 8 9 10
答案 A B B B D D C C C C
二、填空题:( 32分)
11. -5; 12.2; 13.8; 14. -1; 15. n(n﹣1);
16. ∠1+∠2=143°45′,∠3=36°15′.; 17.16; 18.0.
三、1 9.解: (1)原式=36×(﹣ ﹣ )…………………………3分
=﹣15﹣16 …………………………4分
=﹣31; …………………………5分
(2)原式=0﹣8÷(﹣64)﹣ …………………………3分
= ﹣ …………………………4分
=0. ………………………… 5分
20.解:(1)4x﹣3=﹣4,
4x﹣60+3x=﹣4,…………………………2分
7x=56,…………………………3分
x=8;…………………………5分
(2 ) (1﹣2x)= (3x+1),
7(1﹣2x)=6(3x+1),…………………………1分
7 ﹣14x=18x+6, …………………………2分
﹣14x﹣18x=6﹣7,…………………………3分
﹣32x=﹣1,…………………………4分
x= …………………………5分
21.解:(1)原式=3b+5a﹣(﹣2a+4b﹣3b﹣5a)…………………………2分
=3b+5a+7a﹣b …………………………4分
=12a+2b …………………………5分
22.解:(1)总人数是:10÷20%=50,
则D级的人数是:50﹣10﹣23﹣12=5.
条形统计图补充如下:
;…………………………3分
(2)D级的学生人数占全班学生人数的百分比是:1﹣46%﹣20%﹣24%=10%;
D级所在的扇形的圆心角度数是360×10%=36°;…………………………6分
(3)∵A级所占的百分比为20%,
∴A级的人数为:600×20%=120(人).…………………………10分
B卷
23.原式=2a2b+2ab2﹣2a2b+2﹣ab2﹣2…………………………3分
=ab2,…………………………6分
当a=1,b=﹣3时,原式=9.…………………………8分
24. 方程去分母得:4(2x﹣1)=3(x+2)﹣12,………………………2分
去括号得:8x﹣4=3x+6﹣12,………………………4分
移项合并得:5x=﹣2,………………………6分
解得:x=﹣0.4.………………………8分
25. 解:∵MN= AM,且MN=3cm,
∴AM=5cm. ………………………2分
又∵点M为线段AB的中点
∴AM=BM= AB, ………………………4分
∴AB=10cm. ………………………6分
又∵NB=BM﹣M N, ………………………8分
∴NB=2cm.………………………10分
26.解:(1)∵OA平分∠EOC,
∴∠AOC= ∠EOC= ×70°=35°,………………………2分
∴∠BOD=∠AOC=35°;………………………3分
(2)设∠EOC=2x,∠EOD=3x,………………………4分
根据题意得2x+3x=180°,解得x=36°,………………………6分
∴∠EOC=2x=72°,………………………8分
∴∠AOC= ∠EOC= ×72°=36°,………………………10分
∴∠BOD=∠AOC=36°.………………………12分
27. 解:设每件衬衫降价x元,依题意有
120×400+(120﹣x)×100=80×500×(1+45%),………………………10分
解得x=20.………………………11分
答:每件衬衫降价20元时,销售完这批衬衫正好达到盈利45%的预期目标.………………………12分
苏教版七年级上册数学期末测试卷及答案
成功的花由汗水浇灌,艰苦的掘流出甘甜的泉,祝: 七年级数学 期末考试时能超水平发挥。下面是我为大家精心整理的苏教版七年级上册数学期末测试卷,仅供参考。
苏教版七年级上册数学期末测试题
一、选择题(本大题共有10小题.每小题2分,共20分)
1.下列运算正确的是()
A.﹣a2b+2a2b=a2b B.2a﹣a=2
C.3a2+2a2=5a4 D.2a+b=2ab
2.在我国南海某海域探明可燃冰储量约有194亿立方米.194亿用科学记数法表示为()
A.1.94×1010 B.0.194×1010 C.19.4×109 D.1.94×109
3.已知(1﹣m)2+|n+2|=0,则m+n的值为()
A.﹣1 B.﹣3 C.3 D.不能确定
4.下列关于单项式 的说法中,正确的是()
A.系数是3,次数是2 B.系数是 ,次数是2
C.系数是 ,次数是3 D.系数是 ,次数是3
5.由一个圆柱体与一个长方体组成的几何体如图,这个几何体的左视图是()
A. B. C. D.
6.如图,三条直线相交于点O.若CO⊥AB,∠1=56°,则∠2等于()
A.30° B.34° C.45° D.56°
7.如图,E点是AD延长线上一点,下列条件中,不能判定直线BC∥AD的是()
A.∠3=∠4 B.∠C=∠CDE C.∠1=∠2 D.∠C+∠ADC=180°
8.关于x的方程4x﹣3m=2的解是x=m,则m的值是()
A.﹣2 B.2 C.﹣ D.
9.下列说法:
①两点之间的所有连线中,线段短;
②相等的角是对顶角;
③过直线外一点有且一条直线与己知直线平行;
④两点之间的距离是两点间的线段.
其中正确的个数是()
A.1个 B.2个 C.3个 D.4个
10.如图,平面内有公共端点的六条射线OA,OB,OC,OD,OE,OF,从射线OA开始按逆时针方向依次在射线上写出数字1,2,3,4,5,6,7,…,则数字“2016”在()
A.射线OA上 B.射线OB上 C.射线OD上 D.射线OF上
二、填空题(本大题共有10小题,每小题3分,共30分)
11.比较大小:﹣ ﹣0.4.
12.计算: =.
13.若∠α=34°36′,则∠α的余角为.
14.若﹣2x2m+1y6与3x3m﹣1y10+4n是同类项,则m+n=.
15.若有理数在数轴上的位置如图所示,则化简|a+c|+|a﹣b|﹣|c+b|=.
16.若代数式x+y的值是1,则代数式(x+y)2﹣x﹣y+1的值是.
17.若方程2(2x﹣1)=3x+1与方程m=x﹣1的解相同,则m的值为.
18.已知线段AB=20cm,直线AB上有一点C,且BC=6cm,M是线段AC的中点,则AM=cm.
19.某商品每件的标价是330元,按标价的八折销售时,仍可获利10%,则这种商品每件的进价为元.
20.将一个边长为10cm正方形,沿粗黑实线剪下4个边长为cm的小正方形,拼成一个大正方形作为直四棱柱的一个底面;余下部分按虚线折叠成一个无盖直四棱柱;后把两部分拼在一起,组成一个完整的直四棱柱,它的表面积等于原正方形的面积.
三、解答题(本大题有8小题,共50分)
21.计算:﹣14﹣(1﹣ )÷3×|3﹣(﹣3)2|.
22.解方程:
(1)4﹣x=3(2﹣x);
(2) ﹣ =1.
23.先化简,再求值:5(3a2b﹣ab2)﹣4(﹣ab2+3a2b),其中a=﹣1,b=﹣2.
24.已知代数式6x2+bx﹣y+5﹣2ax2+x+5y﹣1的值与字母x的取值无关
(1)求a、b的值;
(2)求a2﹣2ab+b2的值.
25.如图,点P是∠AOB的边OB上的一点.
(1)过点P画OB的垂线,交OA于点C,
(2)过点P画OA的垂线,垂足为H,
(3)线段PH的长度是点P到的距离,线段是点C到直线OB的距离.
(4)因为直线外一点到直线上各点连接的所有线中,垂线段短,所以线段PC、PH、OC这三条线段大小关系是(用“<”号连接)
26.某酒店有三人间、双人间客房若干,各种房型每天的收费标准如下:
普通(元/间) 豪华(元/间)
三人间 160 400
双人间 140 300
一个50人的旅游团到该酒店入住,选择了一些三人普通间和双人豪华间入住,且恰好住满.已知该旅游团当日住宿费用共计4020元,问该旅游团入住的三人普通间和双人豪华间各为几间?
27.已知∠AOC=∠BOD=α(0°<α<180°)
(1)如图1,若α=90°
①写出图中一组相等的角(除直角外),理由是
②试猜想∠COD和∠AOB在数量上是相等、互余、还是互补的关系,并说明理由;
(2)如图2,∠COD+∠AOB和∠AOC满足的等量关系是;当α=°,∠COD和∠AOB互余.
28.如图,直线l上有AB两点,AB=12cm,点O是线段AB上的一点,OA=2OB
(1)OA=cm OB=cm;
(2)若点C是线段AB上一点,且满足AC=CO+CB,求CO的长;
(3)若动点P,Q分别从A,B同时出发,向右运动,点P的速度为2cm/s,点Q的速度为1cm/s.设运动时间为ts,当点P与点Q重合时,P,Q两点停止运动.
①当t为何值时,2OP﹣OQ=4;
②当点P经过点O时,动点M从点O出发,以3cm/s的速度也向右运动.当点M追上点Q后立即返回,以3cm/s的速度向点P运动,遇到点P后再立即返回,以3cm/s的速度向点Q运动,如此往返,知道点P,Q停止时,点M也停止运动.在此过程中,点M行驶的总路程是多少?
苏教版七年级上册数学期末测试卷参
一、选择题(本大题共有10小题.每小题2分,共20分)
1.下列运算正确的是()
A.﹣a2b+2a2b=a2b B.2a﹣a=2
C.3a2+2a2=5a4 D.2a+b=2ab
【考点】合并同类项.
【专题】计算题.
【分析】根据合并同类项的法则,合并时系数相加减,字母与字母的指数不变.
【解答】解:A、正确;
B、2a﹣a=a;
C、3a2+2a2=5a2;
D、不能进一步计算.
故选:A.
【点评】此题考查了同类项定义中的两个“相同”:
(1)所含字母相同;
(2)相同字母的指数相同,是易混点,还有注意同类项与字母的顺序无关.
还考查了合并同类项的法则,注意准确应用.
2.在我国南海某海域探明可燃冰储量约有194亿立方米.194亿用科学记数法表示为()
A.1.94×1010 B.0.194×1010 C.19.4×109 D.1.94×109
【考点】科学记数法—表示较大的数.
【分析】科学记数法的表示形式为a×10n的形式,其中1≤|a|<10,n为整数.确定n的值时,要看把原数变成a时,小数点移动了多少位,n的与小数点移动的位数相同.当原数>1时,n是正数;当原数的<1时,n是负数.
【解答】解:194亿=19400000000,用科学记数法表示为:1.94×1010.
故选:A.
【点评】此题考查了科学记数法的表示 方法 .科学记数法的表示形式为a×10n的形式,其中1≤|a|<10,n为整数,表示时关键要正确确定a的值以及n的值.
3.已知(1﹣m)2+|n+2|=0,则m+n的值为()
A.﹣1 B.﹣3 C.3 D.不能确定
【考点】非负数的性质:偶次方;非负数的性质:.
【分析】本题可根据非负数的性质得出m、n的值,再代入原式中求解即可.
【解答】解:依题意得:
1﹣m=0,n+2=0,
解得m=1,n=﹣2,
∴m+n=1﹣2=﹣1.
故选A.
【点评】本题考查了非负数的性质,初中阶段有三种类型的非负数:
(1);
(2)偶次方;
(3)二次根式(算术平方根).
当非负数相加和为0时,必须满足其中的每一项都等于0.根据这个结论可以求解这类题目.
4.下列关于单项式 的说法中,正确的是()
A.系数是3,次数是2 B.系数是 ,次数是2
C.系数是 ,次数是3 D.系数是 ,次数是3
【考点】单项式.
【分析】根据单项式系数、次数的定义来求解.单项式中数字因数叫做单项式的系数,所有字母的指数和叫做这个单项式的次数.
【解答】解:根据单项式系数、次数的定义可知,单项式 的系数是 ,次数是3.
故选D.
【点评】确定单项式的系数和次数时,把一个单项式分解成数字因数和字母因式的积,是找准单项式的系数和次数的关键.
5.由一个圆柱体与一个长方体组成的几何体如图,这个几何体的左视图是()
A. B. C. D.
【考点】由三视图判断几何体;简单组合体的三视图.
【分析】找到从左面看所得到的图形即可.
【解答】解:从左面可看到一个长方形和上面的中间有一个小长方形.
故选:D.
【点评】本题考查了三视图的知识,左视图是从物体的左面看得到的视图.
6.如图,三条直线相交于点O.若CO⊥AB,∠1=56°,则∠2等于()
A.30° B.34° C.45° D.56°
【考点】垂线.
【分析】根据垂线的定义求出∠3,然后利用对顶角相等解答.
【解答】解:∵CO⊥AB,∠1=56°,
∴∠3=90°﹣∠1=90°﹣56°=34°,
∴∠2=∠3=34°.
故选:B.
【点评】本题考查了垂线的定义,对顶角相等的性质,是基础题.
7.如图,E点是AD延长线上一点,下列条件中,不能判定直线BC∥AD的是()
A.∠3=∠4 B.∠C=∠CDE C.∠1=∠2 D.∠C+∠ADC=180°
【考点】平行线的判定.
【分析】分别利用同旁内角互补两直线平行,内错角相等两直线平行得出答案即可.
【解答】解:A、∵∠3+∠4,
∴BC∥AD,本选项不合题意;
B、∵∠C=∠CDE,
∴BC∥AD,本选项不合题意;
C、∵∠1=∠2,
∴AB∥CD,本选项符合题意;
D、∵∠C+∠ADC=180°,
∴AD∥BC,本选项不符合题意.
故选:C.
【点评】此题考查了平行线的判定,平行线的判定方法有:同位角相等两直线平行;内错角相等两直线平行;同旁内角互补两直线平行,熟练掌握平行线的判定是解本题的关键.
8.关于x的方程4x﹣3m=2的解是x=m,则m的值是()
A.﹣2 B.2 C.﹣ D.
【考点】一元一次方程的解.
【专题】计算题;应用题.
【分析】使方程两边左右相等的未知数叫做方程的解方程的解.
【解答】解:把x=m代入方程得
4m﹣3m=2,
m=2,
故选B.
【点评】本题考查了一元一次方程的解,解题的关键是理解方程的解的含义.
9.下列说法:
①两点之间的所有连线中,线段短;
②相等的角是对顶角;
③过直线外一点有且一条直线与己知直线平行;
④两点之间的距离是两点间的线段.
其中正确的个数是()
A.1个 B.2个 C.3个 D.4个
【考点】线段的性质:两点之间线段短;两点间的距离;对顶角、邻补角;平行公理及推论.
【分析】根据两点的所有连线中,可以有无数种连法,如折线、曲线、线段等,这些所有的线中,线段短可得①说确;根据对顶角相等可得②错误;根据平行公理:经过直线外一点,有且只有一条直线与这条直线平行,可得说确;根据连接两点间的线段的长度叫两点间的距离可得④错误.
【解答】解:①两点之间的所有连线中,线段短,说确;
②相等的角是对顶角,说法错误;
③过直线外一点有且一条直线与己知直线平行,说确;
④两点之间的距离是两点间的线段,说法错误.
正确的说法有2个,
故选:B.
【点评】此题主要考查了线段的性质,平行公理.两点之间的距离,对顶角,关键是熟练掌握课本基础知识.
10.如图,平面内有公共端点的六条射线OA,OB,OC,OD,OE,OF,从射线OA开始按逆时针方向依次在射线上写出数字1,2,3,4,5,6,7,…,则数字“2016”在()
A.射线OA上 B.射线OB上 C.射线OD上 D.射线OF上
【考点】规律型:数字的变化类.
【分析】分析图形,可得出各射线上点的特点,再看2016符合哪条射线,即可解决问题.
【解答】解:由图可知OA上的点为6n,OB上的点为6n+1,OC上的点为6n+2,OD上的点为6n+3,OE上的点为6n+4,OF上的点为6n+5,(n∈N)
∵2016÷6=336,
∴2016在射线OA上.
故选A.
【点评】本题的数字的变换,解题的关键是根据图形得出每条射线上数的特点.
二、填空题(本大题共有10小题,每小题3分,共30分)
11.比较大小:﹣ >﹣0.4.
【考点】有理数大小比较.
【专题】推理填空题;实数.
【分析】有理数大小比较的法则:①正数都大于0;②负数都小于0;③正数大于一切负数;④两个负数,大的其值反而小,据此判断即可.
【解答】解:|﹣ |= ,|﹣0.4|=0.4,
∵ <0.4,
∴﹣ >﹣0.4.
故答案为:>.
【点评】此题主要考查了有理数大小比较的方法,要熟练掌握,解答此题的关键是要明确:①正数都大于0;②负数都小于0;③正数大于一切负数;④两个负数,大的其值反而小.
12.计算: =﹣ .
【考点】有理数的乘方.
【分析】直接利用乘方的意义和计算方法计算得出答案即可.
【解答】解:﹣(﹣ )2=﹣ .
故答案为:﹣ .
【点评】此题考查有理数的乘方,掌握乘方的意义和计算方法是解决问题的关键.
13.若∠α=34°36′,则∠α的余角为55°24′.
【考点】余角和补角;度分秒的换算.
【分析】根据如果两个角的和等于90°(直角),就说这两个角互为余角.即其中一个角是另一个角的余角进行计算.
【解答】解:∠α的余角为:90°﹣34°36′=89°60′﹣34°36′=55°24′,
故答案为:55°24′.
【点评】此题主要考查了余角,关键是掌握余角定义.
14.若﹣2x2m+1y6与3x3m﹣1y10+4n是同类项,则m+n=1.
【考点】同类项.
【分析】根据同类项的定义(所含字母相同,相同字母的指数相同)列出方程2m+1=3m﹣1,10+4n=6,求出n,m的值,再代入代数式计算即可.
【解答】解:∵﹣2x2m+1y6与3x3m﹣1y10+4n是同类项,
∴2m+1=3m﹣1,10+4n=6,
∴n=﹣1,m=2,
∴m+n=2﹣1=1.
故答案为1.
【点评】本题考查同类项的定义、方程思想及负整数指数的意义,是一道基础题,比较容易解答.
15.若有理数在数轴上的位置如图所示,则化简|a+c|+|a﹣b|﹣|c+b|=0.
【考点】实数与数轴.
【专题】计算题.
【分析】先根据数轴上各点的位置判断出a,b,c的符号及|a|,|b|和|c|的大小,接着判定a+c、a﹣b、c+b的符号,再化简即可求解.
【解答】解:由上图可知,c
人教版七年级数学上册期末试卷及答案
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一、选择题(每小题3分,共30分):
1.下列变形正确的是( )
A.若x2=y2,则x=y B.若 ,则x=y
C.若x(x-2)=5(2-x),则x= -5 D.若(m+n)x=(m+n)y,则x=y
2.截止到2010年5月19日,已有21600名中外记者成为上海世博会的注册记者,将21600用科学计数法表示为( )
A.0.216×105 B.21.6×103 C.2.16×103 D.2.16×104
3.下列计算正确的是( )
A.3a-2a=1 B.x2y-2xy2= -xy2
C.3a2+5a2=8a4 D.3ax-2xa=ax
4.有理数a、b在数轴上表示如图3所示,下列结论错误的是( )