八年级下册第二模块单元测试题
八年级英语（下）第二模块单元测试题
一、单项选择
1. — Sam, do you know ______ Alice won the English competition? —Really? That’s great!
A. that
B. when
C. why
D. where
2. Peter is afraid ______ in front of others because his English is not good.
A. to tell
B. to talking
C. to speak
D. of telling
3. — How is Tom at school?
— He is ______ and ______ wants to play with him.
A. alone; someone
B. lonely; any one
C. happy; no one
D. lazy; no one
4. — Mary, ask your grandmother to have dinner with us.
—But she is ill and she doesn’t feel like ______ anything.
A. to eat
B. to drink
C. eating
D. drinking
5. — Tom, do you know David Smith?
— Sure. He is my best friend and our ______ has lasted for years.
A. activities
B. friendship
C. recording
D. hobbies
6. It will you about thirteen hours to fly to England from Hong Kong.
A. spend
B. take
C. use
D. pay
7. My father has me the ending of the football game.
A. told; with
B. tell; about
C. tell; with
D. told; about
8. I don’t like the bag. Please give me a better .
A. one
B. ones
C. it
D. them
9. Mr Wang bought a small cat my sister.
A. to
B. for
C. of
D. in
10. I’ve done my homework. But I haven’t cleaned the car .
A. already
B. just
C. never
D. yet
11. — Did the singing star agree to come?
—Yes, but I’m not sure ______ or not he will come on time.
A. whether
B. if
C. when
D. where
12. I remembered ______ my homework last night, but I can’t find it now.
A. to finish
B. finishing
C. check
D. to check
13. — Linda, I will have an English test on Wednesday.
— ______
A. Good luck!
B. Excuse me.
C. Hold the line.
D. Look out!
14. — I heard you won first prize in the match. Did your parents know that?
— No, I will tell them ______.
A. at that moment
B. just now
C. right now
D. just then
15. —I’m very tired these days because of studying chemistry.
— Why not listen to music? It can make you ______.
A. beautiful
B. boring
C. funny
D. relaxed
16．I don't know ____he will come tomorrow．___ he comes，I'll tell you．A．if；Whether B．whether；Whether C．if；That D．if；If 17．I don't know _________ the day after tomorrow．
A.when does she come B．how will she come
C．if she comes D．whether she'll come
18．Could you tell me _________ the bookshop is？
A.what B．how C．whether D．where
19．Do you know what time _________ ？
A．the bus leave B．does the bus leave
C．will the bus leave D．the bus leaves
20．I don't know _________ ．Can you tell me，please？
A．how Sally and Lingling are old B．how old are Sally and Lingling C．Sally and Lingling are how old D．how old Sally and Lingling are
二、完形填空
Now most students are under a lot of pressure(压力). Every year they look different and feel different. They are 21 year by year. They have to 22 things for themselves. They 23 to be unhappy.
If they know the secret to be happy, it is easier 24 them to be happy. Kate is a middle school student. She is much 25 t han before. “I couldn’t find any happiness for a 26 time. In the past, I cared too much 27
what other people thought of me,” said Kate. “At school I was very28 . When I spoke in class, my face turned red, 29 I felt that my classmates were all looking at me. Now I feel a lot more 30 when I’m talking with people around me. I’m sure that if you worry too much about what other people think of you, you will be unhappy.”
21. A. showing up B. turning up
C. growing up
D. standing up
22. A. plan B. think C. care D. look
23. A. find B. seem C. sound D. think
24. A. of B. with C. to D. for
25. A. smarter B. happier C. louder D. friendlier
26. A. much B. few C. little D. long
27. A. about B. after C. to D. of
28. A. kind B. outgoing C. shy D. wild
29. A. before B. until C. so D. because
30. A. interested B. nervous C. relaxed D. upset
三、阅读理解
A
Zhang Yu is ten years old. He and his parents live in a city. It’s far from his grandfather’s home. Usually Zhang Yu can’t see his grandfather. During the Spring Festival, Zhang Yu can live with his grandfather for 20 days. He loves the life in the country(乡村) very much, and he likes to live with his grandfather. Of all the festivals, his favourite is the Spring Festival.
The Spring Festival is coming again. Zhang Yu and his parents are taking a bus to his grandfather’s home. Three hours later, they get there.
Zh ang Yu’s grandfather gets many presents. They are from Zhang Yu’s parents, his uncle and aunt. His grandfather looks very happy. Zhang Yu feels a little sorry. He says to his grandfather, “I’m sorry, grandpa. I can’t buy anything for you now, but when I’m older, I will buy you the best present.” His grandfather says, “I’m happy you can come to see me. You are my best present.”
31. Zhang Yu’s grandfather lives .
A. in the city
B. in the country
C. in a hotel
D. with Zhang Yu
32. is Zhang Yu’s fav ourite festival.
A. The Spring Festival
B. Children’s Day
C. New Year’s Day
D. National Day
33. Zhang Yu and his parents go to his grandfather’s home .
A. by bike
B. by car
C. by bus
D. on foot
34. To Zhang Yu’s grandfather, is his best present.
A. his son’s present
B. his daughter’s present
C. Zhang Yu
D. the expensive present
35. Which one is TRUE?
A. Zhang Yu lives near his grandfather’s home.
B. Zhang Yu’s grandfather loves Zhang Yu very muc h.
C. Zhang Yu’s grandfather buys Zhang Yu a nice present.
D. Zhang Yu likes the Spring Festival because he can get many presents.
B
True friends are not easy to find, so we should do our best to find real friendship and keep it.
When we are with friends, we should try to bring them closer to us. Smile is one of the easiest ways. People like to see happy faces greeting them.
When we talk to someone, ask questions to help him or her keep talking. Don’t ask personal questions, or they may want to walk away.
Listening is important part when you are with friends. You should listen carefully to what people are saying, and respond in the right way. Body language can show that you’re listening.
Some people have the same interests and hobbies as you. It’s easier t o make friends with them. You may spend hours talking about the same interests you have.
Friendship may last for all our life. We should try to keep it long.
36. Why should we try to keep our friendship?
A. Because we can’t find new friends later.
B. Becau se it’s hard to find true friends.
C. Because friendship always lasts quite short.
D. Because friendship will not last long.
37. If we are with friends, we should often ______ when we talk with them.
A. cry
B. laugh
C. smile
D. repeat
38. What does the underlined word “respond” mean?
A. 大笑
B. 应答
C. 书写
D. 拼读
39. What kind of person is easier to make friends with?
A. People who never stop talking.
B. People who are good at body language.
C. People who like asking personal questions.
D. People who have the same interests as you do.
40. What does the writer think of friendship?
A. We should try to keep it long.
B. We should make friends with all people.
C. Friends must have the same hobbies.
D. Friends should always be together.
C
I can still remember my first day at school. I was only 6 years old at that time. It was a very big room. I sat at the desk near the window, but I couldn’t see anything because the window was too high. There was a big map of the world on the wall and an old blackb oard. I don’t think I was worried or afraid at that time. There was another little boy next to me. He sat there and kept silent at first. Then he began to cry, because he didn’t want to stay there.
More and more students came in, but the boy didn’t stop crying. “Mom, I want to go home.” He cried again and again. Later, the teacher came in. She went to the little boy, and said something to him. I couldn’t hear what she said. Soon the boy stopped crying and began to smile. To this day, I still don’t know what the teacher said to the little boy.
根据短文内容，判断句子正误，正确的在括号中填T,错误的填F。
41. The writer went to school when he was 6 years old.
42. She sat near the window, so she could look outside.
43. She was not worried. She was afraid.
44. When the teacher came in, the little boy stopped crying.
45. The writer knew what the teacher said to the little boy.
D
There was once a man who kept ten monkeys as pets as he was very fond of them．Every morning the monkeys would climb up and down the trees or swing from one branch（树枝）to another in his backyard．After that，he would feed them bananas．
One morning the man said to the monkeys，“We have very few bananas left today．For breakfast I shall give each of you two bananas and four for dinner．”
When the monkeys heard this，they looked very unhappy．They refused（拒绝）to take the bananas that the man was handing out to them．
“Very well，then．You shall have four bananas in the morning and two for dinner，”the man said．
The monkeys looked at one another．Then they jumped up and down happily，nodding their heads．They took the big，yellow bananas from the man and started eating．
46．The man kept the monkeys because he _________ ．
A．liked them B．sold monkeys as pets
C．wanted them to work for him D．had many banana trees in his backyard 47．The man fed the monkeys _________ ．
A．twice a day B．in the afternoon C．only when they were hungry
D．before they climbed up and down the trees
48．At first the man wanted to give the monkeys _________ bananas for dinner．A．one B．two C．three D．four
49．The monkeys were unhappy and they _________ ．
A．ran away B．nodded their heads
C．didn't take the bananas from the man D．jumped up and down 50．Finally，the monkeys ate _________ bananas for the whole day．A．less B．more C．five D．the same number of
四、用所给词的适当形式填空
My hobby is 1 (play) chess-one of the greatest games in the world.My mum taught me how to play when I 2 (be) seven years old. She 3 (win) every time in the first year. But then,on my 4 (eight) birthday,I won for the first time. Now I am always the winner between us.
It takes about a year 5 (learn) the rules.So if you want to be good,you have to practise for 6 (year).You don't need much to play chess-just a chess set and someone to play with,Chess sets should be very cheap or quite expensive.Some people take collecting chess sets as a hobby,but I prefer to 7 (pay).
There is a chess club in our school.We meet weekly to play with each other.I am the 8 (good)player in the club,and the captain of the school chess team.This year we won the All England School's Championship. I had to go up on stage in front of the whole school to collect the prize.
I'm 9 (save) up my money to buy a chess games . It's very good for practice.That way I'll always have someone to play with,and I 'm sure I'll make much 10 (much) progress.
五、任务型阅读
①An interesting and beautiful city. You can enjoy Beijing Hutungs(胡同). You can visit the Great Wall, ________ and many other places. And you can enjoy delicious food. $500!
②What would you like to do during these fifteen days? Do you want to go to summer camp (夏令营)? It’s an exciting activity. It’s only 150 dollars.
③Come and practice swimming every afternoon for five days. You only need to pay 100 dollars.
④ Where do you want to go for your vacation? What about Australia? You can
enjoy beautiful beaches and sunshine. Just $600!
⑤If you like climbing a mountain, please join us. The activity is from Oct. 4th to Oct. 7th. The price is 120 dollars.
1. 为上面五则广告选择合适的题目。
A. One week in Australia
B. Exciting summer camp!
C. Three days in Beijing, China
D. Do you like climbing?
E. Happy swimming club（俱乐部）
①____ ②____ ③____ ④____ ⑤____
2. 回答问题：
You have a seven-day vacation. Can you join in the summer camp?
3. 选出能填入横线上的一项：______
A. Central Park
B. the Palace Museum
C. New York City
4. 回答问题：How many days will it take you if you want to climb a mountain?
5. 将文中画线的句子译成汉语：
六、句子翻译
1.你知道萨利到了没有吗？
2.我问过你的秘书她是否可以一起来。
3.我感到很孤独，不敢与任何人交朋友。
4.没关系，因为所有灰暗的日子都已经过去了。
5.现在我认为，你感觉世界是怎样的，它就是怎样的。
6.你能告诉我你来自哪里吗？
7.我知道外国人发现中国与他们自己的国家有很大的不同。
8.我不知道谁会来。
9.我听说你在校管弦乐队演奏。
10.顺便问一下，为什么不把你所有的朋友都带到北京电台来参观呢？
七、书面表达
阳光中学校报决定举行一次以My good friend为题的英语征文大赛，假设李泉是你的好朋友，请根据下列提示写一篇70词左右的短文。
注意：包含所有信息；适当拓展。
Name：Li Quan
Age：15
Appearance：Short and black hair
School：No. 2 Middle School
Character：Friendly, helpful
Hobbies：Playing basketball and computer games
Dream：Travel into space
八年级英语（下）第二模块单元测试题答案：
一、(20分)1-5 ACDCB 6-10 BDABD 11-15 ABACD 16-20 DDDDD
二、（10分）21-25 CABDB 26-30 DACDC
三、（20分）31-35 BACCB 36-40 BCBDA 41-45 TFFFF 46-50 AADCD
四、（10分）1.playing 2.was 3.won 4.eighth 5.to learn
6.years
7.pay
8.best
9.saving 10.more
五、（10分）1. ① C ② B ③ E ④ A ⑤ D 2. No, I can’t. 3. B 4. Four days. 5.你可以享受美丽的海滩和阳光。只需600美元！
六、（15分）1.Do you know if Sally has arrived?
2.I asked your secretary whether she could come or not .
3.I was very lonely, and afraid to make friends with anyone.
4.It dosen’t matter because all the dark days have gone.
5.Now I believe that the world is what you think it is.
6.Can you tell me where you are from?
7.I know that foreigners find China very different from their own countries.
8.I don’t know who will come.
9.I’ve heard that you play in the school orchestra.
10.By the way, Why don’t you bring your friends for a visit to Radio
Beijing.
七、（15分）
I have a good friend. His name is Li Quan. He is 15 years old now. He has short and black hair. He studies at No. 2 Middle School. He is friendly to everyone and always helps others. He likes playing basketball very much. He also likes watching TV and playing computer games. He likes travelling very much. He wants to travel far into space when he grows up.
八年级下学期数学测试卷及答案
八年级下学期数学测试卷 一、选择题： 1.如果代数式有意义，那么x的取值范围是（） A．x≥0 B．x≠1 C．x＞0 D．x≥0且x≠1 2. 下列各组数中，以a、b、c为边的三角形不是直角三角形的是（） A 1.5,2,3 a b c === B 7,24,25 a b c === C 6,8,10 a b c === D 3,4,5 a b c === 3.如图，直线l上有三个正方形a b c ，，，若a c ，的面积分别为5和11，则b的面积为（） Ａ．4 Ｂ．6 C．16 Ｄ．55 4. 如图，在平行四边形ABCD中，下列结论中错误的是（） A．∠1=∠2B．∠BAD=∠BCD C．A B=CD D．A C⊥BD 5. 如图，在平行四边形ABCD中，对角线AC，BD相交于点O，点E，F分别是边AD，AB的中点，EF交AC于点H ，则的值为（） A．1B．C．D．6.0) y kx b k =+≠ （的图象如图所示，当0 y>时，x的取值范围是 （） A.0 x< B.0 x> C.2 x< D.2 x> 7. 体育课上，20人一组进行足球比赛，每人射点球5次，已知某一组的进球总数为49个，进球情况记录如下表，其中进2个球的有x人，进3个球的有y人， 进球数0 1 2 3 4 5 人数 1 5 x y 3 2 A.y=x+9与y= 3 x+ 3 B.y=－x+9与y= 3 x+ 3 C.y=－x+9与y=－ 2 3 x+ 22 3 D.y=x+9与y=－ 2 3 x+ 22 3 8. 已知一次函数y=kx+b（k、b为常数且k≠0）的图象经过点A（0，﹣2）和点B（1，0），则k=，b= 9.已知:ΔABC中,AB=4,AC=3,BC=7,则ΔABC的面积是( ) A.6 B.5 C.1.57 D.27 10. 如图，已知一条直线经过点A（0，2）、点B（1，0），将这条直线向左平移与x轴、y 轴分别交与点C、点D．若DB=DC，则直线CD的函数解析式为． a b c
八年级物理下册练习题及答案
1、如图所示，从斜面底端被弹簧弹出的木块在沿光滑斜面上滑的过程中受到（不计空气阻 力）（） A、重力、支持力 B、重力、支持力、推力 C、重力、摩擦力、冲力 D、重力、摩擦力、推力 2、如图所示，利用弹簧测力计将处于容器底部的物块缓慢上提。在物块从开始上提到离开 水面的过程中，下图能正确表示弹簧测力计的示数F与物块底部离容器底部的高h的关系的是（） 3、用手握住酒瓶，使其瓶口朝上竖直静止在手中，则下列说法正确的是（） A．酒瓶能静止在手中，是由于手对酒瓶的握力等于酒瓶的重力 B．酒瓶能静止在手中，是由于手对酒瓶的握力大于酒瓶的重力 C．手握酒瓶的力增大，瓶子所受的摩擦力不变 D．手握酒瓶的力增大，瓶子所受的摩擦力也增大 4、小欣同学在厨房帮妈妈做饭时观察到了一些现象，并用所学物理知识进行了解释，其中解释不正确的是（） A．茶壶的壶嘴和壶身构成连通器，静止时水面相平 B．锅铲柄有凹凸的花纹是为了增大摩擦 C．刀刃很锋利是通过增大压力来增大压强 D．高压锅容易将食物煮熟是因为液体表面气压增大，液体沸点升高 5、如图所示的薄壁容器，底面积为100厘米2，装了重25牛的水后，水面距容器底部20厘米，则水对容器底部的压力、压强分别为（） A．25牛、2.5×103帕，B．25牛、2.5帕 C．2×105牛、2×103帕D．20牛、2×103帕 6、在靠近桌面边沿的地方放一枚硬币，在硬币前架一个约2 cm高的栏杆，在硬币上方沿着
与桌面平行的方向用力吹一口气，硬币就能跳过栏杆，这是因为( ) A.硬币下方的压强比上方的压强大 B.硬币后面的压强比前面的压强大 C.硬币后面的压力比前面的压力大 D.硬币下方的空气密度比上方的大 7、如图所示的容器中装有某种液体，试比较A 、B 、C 、D 四点液体的压强。它们之间的关系是（ ） A 、P P P P A B C D <<= B 、P P P P A B C D <=> C 、P P P P A B C D <<< D 、P P P P A B C D >>> 8、关于力的概念，下列哪句话是错误的 （ ） A ．没有物体就没有力 B ．有受力物体时，一定有施力物体 C ．有施力物体时，却不一定有受力物体 D ．只有一个物体时，不会有力 9、用手握住酱油瓶，瓶子没有下滑，是因为 ( ) A.手对酱油瓶的摩擦力和酱油瓶的重力平衡 B.手对酱油瓶的压力和酱油瓶的重力平衡 C.手对酱油瓶的压力和手对酱油瓶的摩擦力平衡 D.以上三种说法均不对 10．首次测出大气压值的著名实验是 实验。在图中，A 、B 是一个连通器的两个上端开口，当用一个管子沿B 开口吹气时，A 开口一端的液面会 （选填“上升”、“下降”或“不变”）。 11、寒冷的冬天，在茶杯中倒上大半杯开水后拧紧杯盖，往往过一会儿后就发现杯盖很难打开，这是由于杯内大量水蒸气发生 ________（填物态变化名称），使内外气体压力差 ________（填“增大”或“减小”），进而增大了盖与杯之间摩擦力原因． 12.当马拉着载有1000kg 货物的雪撬在平直的公路上匀速向南行驶时，马对雪橇的水平拉力是500N ，雪撬在水平方向上受到的阻力是________N ，方向是________；若雪橇上的货物卸下了500kg ，马拉雪橇仍是匀速行驶，马对雪橇的水平拉力将会_______（填“增大”、“减小”、“不变” ） 13、吊车以2m/s 的速度将重物1×105 匀速向上提起，这时钢索对重物的拉力是________N ； 若钢索改为以3m/s 的速度使重物匀速下降，此时钢索对重物的拉力大小是__________N ，方向__________。 14、打开自来水龙头，使自来水流过如图2所示的玻璃管，在A 、B 、C 三处，水的流速较大的是 处，压强较小的是 处（选填“ A”“B”或“C”）。 如图3所示，是喷雾器的原理示意图，当空气从小孔迅速流出，小孔附近空气的流速较大，压强 ____ （填“大于”、“小于”或“等于”）容器里液面上方的空气压强，液体就沿细管上升，从管口中流出后，受气流的冲击，被喷成雾状。
人教版八年级数学下册全册综合测试题
八年级（下）期末数学试卷 一、选择题（本题有10小题，每小题3分，满分30分） 1．下列二次根式中，是最简二次根式的是（） A． B．C．D． A．94 B．96 C．113 D．113.5 3．在一个直角三角形中，已知两直角边分别为6cm，8cm，则下列结论不正确的是（） A．斜边长为10cm B．周长为25cm C．面积为24cm2D．斜边上的中线长为5cm 4．如图，?ABCD中，对角线AC，BD相交于点O，OA=3，若要使平行四边形ABCD为矩形，则OB的长度为（） A．4 B．3 C．2 D．1 x与方差S2： 平均数 ） A．甲B．乙C．丙D．丁 6．下列各命题的逆命题成立的是（） A．全等三角形的对应角相等 B．如果两个数相等，那么它们的绝对值相等 C．对角线互相平分的四边形是平行四边形 D．如果两个角都是90°，那么这两个角相等 7．已知直线y=kx+b与y=2x﹣5平行且经过点（1，3），则y=kx+b的表达式是（） A．y=x+2 B．y=2x+1 C．y=2x+2 D．y=2x+3 8．已知正比例函数y=kx，且y随x的增大而减少，则直线y=2x+k的图象是（） A． B． C． D． 9．如图，?ABCD中，AB=4，BC=3，∠DCB=30°，动点E从B点出发，沿B﹣C﹣D﹣A运动至A 点停止，设运动的路程为x，△ABE的面积为y，则y与x的函数图象用图象表示正确的是（）
A ． B ． C ． D ． 10．在平面直角坐标系中，点A （0，4），B （3，0），且四边形ABCD 为正方形，若直线l ：y=kx +4与线段BC 有交点，则k 的取值范围是（ ） A ．k ≤ B ．﹣≤k ≤﹣ C ．﹣≤k ≤﹣1 D ．﹣≤k ≤ 二、填空题（共6小题，每小题3分，满分18分） 11．化简： = ． 12．如图，?ABCD 中，∠DCE=70°，则∠A= ． 13．如果菱形有一个内角是60°，周长为32，那么较短对角线长是 ． 14．如图，?ABCD 的对角线AC 与BD 相交于点O ，E 为BC 边中点，已知AB=6cm ，则OE 的长为 cm ． 15．直线l 1：y=x +1与直线l 2：y=mx +n 相交于点P （a ，2），则关于x 的不等式x +1≥mx +n 的解集为 ． 16．如图，在矩形ABCD 中的AB 边长为6，BC 边长为9，E 为BC 上一点，且CE=2BE ，将△ABE 翻折得到△AFE ，延长EF 交AD 边于点M ，则线段DM 的长度为 ．
人教版八年级下册物理期末试卷及答案
最新八年级下册物理期末考试 姓名：成绩： __ 3 3 注意事项：本试卷中常数g=10N/kg;水的密度p水=1.0 x 10kg/m 、选择题 1、下面是对日常生活中一些数据的估计，其中最接近实际的是（） A. —名中学生所受的重力约为50N B. 初中物理教科书的质量约1.8kg C. 人的正常步行速度约1.2m/s D. 古剑山山顶的大气压大约是 1.2 x 105 Pa 2、你在上体育课时，遇到了下列一些场景，并由此联想到学过的物理知识，下列联 想错误的是（） A. “跳远助跑”时利用了惯性的原理 B. “引体向上”时手搓镁粉利用了增大摩擦的道理 C. “踢足球”时利用了力使物体运动状态发生改变的道理 D. “仰卧起坐”时利用了大气压的原理 3、如图所示从斜面底端被弹簧弹出的木块在沿光滑斜面上滑的过程中受到（不计空气阻力） A、重力、支持力 B 、重力、支持力、推力 C 重力、摩擦力、冲力 D 、重力、摩擦力、推力 4、汽车在平直公路上匀速行驶，下列说法正确的是（） A .汽车对地面的压力和地面对汽车的支持力是一对平衡力 B. 汽车的重力和它所受到的阻力是一对平衡力 C. 汽车对地面的压力和汽车的重力是一对平衡力 D. 汽车的牵引力和它所受的阻力是一对平衡力 5、在日常生活中，用100N的拉力不能提起重150N的物体的简单机械是（ A.杠杆 B .斜面C .一个定滑轮 D .一个动滑轮 6、如图所示，利用弹簧测力计将处于容器底部的物块缓慢上提。在物块从开始上提到离开 水面的过程中，下图能正确表示弹簧测力计的示数F与物块底部离容器底部的高h的关系的是（ 7、如图是胖子和瘦子两人用滑轮组锻炼身体的简易装置（不考虑轮重和摩擦）.使用时:
八年级下册数学综合测试题(有点难度)
八年级下册数学综合测试卷 一、选择题：（本大题共8题，每小题3分，共30分） 1、若分式1 ||-X X 无意义，则X 的值是：（ ） A ．0 B ．1 C ．－1 D ．±1 2、一次函数y=kx+b 与反比例函数x k y = 的图像如图1所示， 则下列说法正确的是：（ ） A ．它们的函数值y 随x 的增大而增大； B ．它们的函数值y 随x 的增大而减小； C ．k<0 D ．它们的自变量x 的取值为全体实数。 3、在四边形ABCD 中，∠B= 90 , ∠A: ∠D: ∠C=1:2:3，则∠C 为 （ ） A 、 160 B 、 135 C 、 90 D 、 45 4、已知三角形两边长为2和6，要使这个三角形为直角三角形，则第三边的长为：（ ） A ． 2 B ．102 C ．10224或 D ．以上都不对 5、如图2所示，在平面直角坐标系中，菱形ABCD 的顶点A 、B 的坐标分别 是（0, 0），（2, 0），∠α＝60°，则顶点C 在第一象限的坐标是：（ ） A ．（2, 2）， B ．（3, 3）， C ．（3, 2）， D ．（13＋, 3 ）， 6、一块蓄电池的电压（u ）为定值，使用此蓄电池为电源时，电流I(A)与电阻R(Ω)之间的函数关系如图3所示， 如果以此蓄电池为电源的用电器限制电流不得超过10A ，那么此用电器的可变电阻应（注R u I =）：（ ） A ．不小于4.8Ω B ．不大于4.8Ω C ．不小于14Ω D ．不大于14Ω 7、当25--k k 与k k 1 +互为相反数时，k 等于：（ ） A ．56 B ．65 C ．23 D ．3 2 8、已知Rt △ABC 中，∠C=90°，若a+b=14cm ，c=10cm ，则Rt △ABC 的面积是：（ ） A ．24cm 2 B ．36cm 2 C ．48cm 2 D ．60cm 2 9、已知菱形ABCD 的周长为40cm ，两条对角线BD ：AC=3:4，则两条对角线BD 和AC 的长分别是 （ ） A 、24cm 32cm B 、12cm 16cm C 、6cm 8cm D 、3cm 4cm 10、 如图，O 为正方形ABCD 的中心，BE 平分∠DBC ，交DC 于点E ，延长BC 到点F ，使CF=CE ，连接DF ，交BE 的延长线于点G ，连接OG 、OC ，OC 交BG 于点H ．下面四个结论：①△BCE ≌△DCF ；②OG ∥AD ；③BG ⊥DF ；④BH=GH ． 其中正确结论有 （ ） （A ）1个 (B) 2个 (C)3个 (D)4个 二、填空题：（每小题3分，共30分） 11、若4x-3=1，则x=_____________________。 12、已知()2 4-x +)4)(3(--y y =0，且x 、y 是一个直角三角形的两边，则这个直角三角形第三边的长 为 . 13、如图4所示，在等腰梯形ABCD 中，AC ⊥BD ，AC=6cm ，则等腰梯形ABCD 的 面积为________________cm 。 14、a,b 为实数，且ab=1,设1 1 11,11++ +=+++= b a Q b b a a P ， 则P__________Q （填“＞”，“＜”，“＝”） 15、已知反比例函数x k y 42+=的图像在第一、三象限，反比例函数x k y 3 -=，在x ＞0时，y 随x 的增大而大，则k 的取值范围是_________________________。 16、一个四边形的边长依次为a,b,c,d ，且a 2+b 2+c 2+d 2=2ac+2bd 则这个四边形是___________________________。 17、如图5所示，点P 是正方形ABCD 的对角线BD 上一点， PE ⊥BC 于E ，PF ⊥CD 于F ，连接EF ，给出下列四个结论： ① AP=EF ；②△APD 一定是等腰三角形；③∠PFE ＝∠BAP ； ④PD=2EC ，其中正确结论的序号是______________________。 18、在△ABC 中，∠C ＝90°，动点P 从C 点出发沿C →A →B 的 路线以每秒2cm 的速度运动到点B ，则点P 出发___________秒时， △BCP 的面积是△ABC 的面积的一半。 19、某项工程，甲乙两队合做6天可以完成，若甲单独做需x 天完成，乙独做比甲独做多用4天，要求出x 的值，可列出只含x 的方程来解，则列出的方程是 。 20、已知关于x 的方程 12 -x a x —=+的根大于零，则a 的取值范围是 。 三、（本大题9小题，共90分） 21、计算：（1）3234x y y x ? （2）解分式方程： 11322x x x -+=--； 22已知点P （2，2）在反比例函数y= x k (k ≠0)的图象上。 （1）当x=－3 时，求y 的值。 （2）当1＜x ＜3时，求y 的取值范围 y x o 图1 y x C D (A) B O α I(A) R(Ω) O 8 6 A D C B 图4 A B C D P E F 图5 图2
人教版八年级物理下册全册单元测试题及答案
【若缺失公式、图片现象属于系统读取不成功，文档内容齐全完整，请放心下载。】 第七章力单元测试题（一） 一、选择题（每小题2分，共30分） 1．下列物体中物重最接近1N的是：（） A．一袋方便面B．一张学生课桌C．一枚大头针D．一块砖 2．下列测量工具中,能够直接称量物体重力的是：（） A．天平B．弹簧秤C．杆秤D．磅秤 3．小慧用手推小车，使车前进的力的施力物体与受力物体分别是：（） A．地球和小车B．地面和小车C．小慧和小车D．小车和小慧 4．在航空领域，常常发生小鸟撞毁飞机事件。下列关于小鸟和飞机相撞时的说法正确的是：（）A．小鸟受到的力大B．飞机受到的力大 C．小鸟和飞机的受力一样大D．主动撞击的一方产生的力大 5．如图7.1-1所示，利用弹簧测力计测量一块秒表的重力时，使测力计内弹簧伸长的力是：（）A．秒表的重力B．秒表和测力计的总重力 C．秒表对弹簧的拉力D．弹簧对秒表的拉力 6．如图7.1-2所示的事例中，属于运用了重力方向的是：（） 7．用力推课桌的下部，课桌会沿地面滑动，而推课桌的上部，则课桌可能会翻倒，这说明力的作用效果：（） A．与力的大小有关B．与力的方向有关 C．与力的作用点有关D．与受力面积有关 8．如图7.1-3所示，物体运动状态没有发生改变的是：（） 9．在使用弹簧测力计的过程中没有必要的是：（） A．弹簧测力计必须竖直放置,不得歪斜B．使用前指针要“校零” C．使用过程中,弹簧、指针不得与外壳有摩擦D．拉力不得超过弹簧测力计的最大刻度值10．关于力的说法，下列结论正确的是：（） A．只有接触的物体间才可能相互施加力B．力可以离开物体独立存在 C．静止的物体不受力，运动的物体才受力D．受力的物体同时也是施力的物体11．航天员在完全失重的太空舱中进行体能锻炼，下述活动可采用的是：（） A．举哑铃B．在跑步机上跑步C．用弹簧拉力器健身D．引体向上