【导语】“珍珠奶茶李建勋”通过精心收集，向本站投稿了8篇八年级上学期数学第二章检测试题及答案，下面是小编给各位读者分享的八年级上学期数学第二章检测试题及答案，欢迎大家分享。
- 目录
篇1：八年级上学期数学第二章检测试题及答案
八年级上学期数学第二章检测试题及答案
一、选择题
1.在以下数0.3,0,,,0.123456…，0.1001001001…中，其中无理数的个数是
A.2B.3C.4D.5
2.化简的结果是()
A.4B.-4C.±4D.无意义
3.如果a是(-3)2的平方根，那么等于()
A.-3B.-C.±3D.或-
4.下列说法中，正确的是()
A.一个有理数的平方根有两个，它们互为相反数
B.一个有理数的立方根，不是正数就是负数[
C.负数没有立方根
D.如果一个数的立方根是这个数本身，那么这个数一定是-1，0，1
5.下列各式中，无意义的是()
A.B.C.D.
6.若a2=(-5)2,b3=(-5)3,则a+b的值为()
A.0B.±10C.0或10D.0或-10
7.如果+有意义，那么代数式|x-1|+的值为()
A.±8B.8
C.与x的值无关D.无法确定
8.若x<0，则等于()
A.xB.2xC.0D.-2x
二、填空题
9.的算术平方根是______.
10.如果一个数的平方根等于它本身，那么这个数是________.
11.如果=2,那么(x+3)2=______.
12.若+有意义，则=______.
13.若m<0，则m的立方根是。
14.若与|b+2|是互为相反数，则(a-b)2=______.
三、解答题
15.若，求的值。
16.若一个偶数的'立方根比2大，平方根比4小，则这个数可能是多少?
17.一个正方体木块的体积是125cm3,现在将它锯成8个同样大小的正方体小木块，求每个小正方体木块的表面积。
18.若与互为相反数，求的值。
19.若x、y都是实数，且y=++8，求x+3y的立方根.
20.观察下列各式及验证过程：
验证：
=验证：
验证：
(1)按照上述三个等式及其验证过程的基本思路，猜想的变形结果并进行验证;
(2)针对上述各式反映的规律，写出用n(n≥2的自然数)表示的等式，并进行验证.
参考答案：
1.B2.A3.D4.D5.A6.D7.B8.D9.10.0,111.16
12.13.14.9
15.解：由，知
16.10或12或14
17.解：小正方体的体积为cm3，边长为cm，
所以每个小正方体木块的表面积为cm2.
18.解：由与互为相反数，知，得
19.解：由题意知，，x+3y的立方根为3.
20.(1)验证略
(2)验证略
篇2：八年级数学第二章检测试题
八年级数学第二章检测试题
一、选择题
1. 在以下数0.3, 0, , , 0.123456…，0.1001001 001…中，其中无理数的个数是( )
A.2 B.3 C.4 D.5
2. 化简 的 结果是( )
A. 4 B. -4 C.±4 D.无意义
3. 如果a是(-3)2的平方根，那么 等于( )
A.-3 B.- C.±3 D. 或-
4.下 列说法中，正确的是( )
A.一个有理数的平方根有两个，它们互为相反数
B.一个有理数的 立方根，不是正数就是负数[
C.负数没有立方根
D.如果一个数的立方根是这个数本身，那么这个数一定是-1，0，1
5. 下列各式中，无意义的是( )
A. B. C. D.
6. 若a2=(-5)2,b3=(-5)3,则a+b的值为( )
A.0 B.±10 C.0或10 D.0或-10
7. 如果 + 有意义，那么代数式|x-1|+ 的值为( )
A.±8 B.8
C.与x的值无关 D.无法确定
8. 若x<0，则 等于( )
A.x B.2x C.0 D.-2x
二、填空题
9. 的算术平方根是______.
10.如果一个数的平方根等于它本身，那么这个数是________.
11.如果 =2,那么(x+3 )2=______.
12. 若 + 有意义，则 =______.
13. 若m<0，则m的立方根是 。
14. 若 与|b+2|是互为相反数，则(a-b)2=______.
三、解答题
15.若 ，求 的值。
16.若一个偶 数的立方根比2大，平方根比4小，则这个数可能是多少?
17.一个正方体木块的体积是125cm3,现 在将它锯成8个同样大小的正方体小木块，求每个小正方体木块的表面积。
18.若 与 互为相反数，求 的值。
19. 若x、y都是实数，且y= + +8，求x+3y的立方根.
20.观察下列各式及验证过程：
验证：
= 验证：
验证：
(1)按照上述三个等式及其验证过程的'基本思路，猜想 的变形结果并进行验证;
(2)针对上述各式反映的规律，写出用n(n≥2的自然数)表示的等式，并进行验证.
参考答案：
1.B 2.A 3.D 4.D 5.A 6.D 7.B 8.D 9. 10. 0, 1 11. 16
12. 13. 14. 9
15. 解：由 ，知
16. 10或12或14
17. 解：小正方体的体积为 cm3，边长为 cm，
所以每个小正方体木块的表面积为 cm2.
18. 解：由 与 互为相反数，知 ，得
19. 解：由题意知， ，x+3y的立方根为3.
20. (1) 验证略
(2) 验证略
篇3：八年级上学期数学第二章测试题
八年级上学期数学第二章测试题
一、填空题:(每小题3分，共15分)
1.的平方根是______，算术平方根是_______.
2.的相反数是______，绝对值是_______.
3.若=1.032，则1.1×106的立方根是________.
4.满足-
5.估算下列各数的大小：
(1)(误差小于0.1)≈________;(2)(误差小于1)≈________.
二、选择题:(每小题4分，共20分)
1.列下语句正确的是( )
A.正数的算术平方根一定比它本身小;B.两个无理数的和不一定是无理数
C.两个无理数的商一定是无理数;D.实数m的`倒数是
2.在实数-π，，|-2|，，，，0.808008中，无理数个数为( )
A.4 B.5 C.6 D.7
3.a是b的一个平方根，则b的平方根是( )
A.a B.-a C.±a D.a2
4.下列各式计算正确的是( )
A.;B.;C.;D.=13-7=6
5.已知x、y是实数，+(y-3)2=0.若axy-3x=y，则a的值是( )
A. B.- C. D.-
三、通过估算比较大小:(每小题6分，共12分)
1.与; 2.与.
四、计算:(每小题5分，共30分)
1.;2.;3.
4.(-1)(+2); 5.(2-)2; 6.(+1)2002(-1)2003.
五、一个长方体的长为5cm、宽为2cm、高为3cm，而一个正方体的体积是它的3倍.求这个正方体的棱长(结果精确到0.01cm).(10分)
六、计算:(13分)
=______，=______，=______，=______，
=______，=______，=______.
篇4：八年级上学期数学第二单元检测试题
一、选择题
1.在以下数0.3,0,,,0.123456…，0.1001001001…中，其中无理数的个数是
A.2B.3C.4D.5
2.化简的结果是()
A.4B.-4C.±4D.无意义
3.如果a是(-3)2的平方根，那么等于()
A.-3B.-C.±3D.或-
4.下列说法中，正确的是()
A.一个有理数的平方根有两个，它们互为相反数
B.一个有理数的立方根，不是正数就是负数[
C.负数没有立方根
D.如果一个数的立方根是这个数本身，那么这个数一定是-1，0，1
5.下列各式中，无意义的是()
A.B.C.D.
6.若a2=(-5)2,b3=(-5)3,则a+b的值为()
A.0B.±10C.0或10D.0或-10
7.如果+有意义，那么代数式|x-1|+的值为()
A.±8B.8
C.与x的值无关D.无法确定
8.若x<0，则等于()
A.xB.2xC.0D.-2x
二、填空题
9.的算术平方根是______.
10.如果一个数的平方根等于它本身，那么这个数是________.
11.如果=2,那么(x+3)2=______.
12.若+有意义，则=______.
13.若m<0，则m的立方根是。
14.若与|b+2|是互为相反数，则(a-b)2=______.
作为学生一定要尽快掌握所学知识，迅速提高学习能力。接下来初中频道为大家整理了八年级上学期数学第二章测试题，希望能提高大家的成绩。
一、填空题:(每小题3分，共15分)
1.的平方根是______，算术平方根是_______.
2.的相反数是______，绝对值是_______.
3.若=1.032，则1.1×106的立方根是________.
4.满足-
5.估算下列各数的大小：
(1)(误差小于0.1)≈________;(2)(误差小于1)≈________.
二、选择题:(每小题4分，共20分)
1.列下语句正确的是( )
A.正数的算术平方根一定比它本身小;B.两个无理数的和不一定是无理数
C.两个无理数的商一定是无理数;D.实数m的倒数是
2.在实数-π，，|-2|，，，，0.808008中，无理数个数为( )
A.4 B.5 C.6 D.7
3.a是b的一个平方根，则b的平方根是( )
A.a B.-a C.±a D.a2
4.下列各式计算正确的是( )
A.;B.;C.;D.=13-7=6
5.已知x、y是实数，+(y-3)2=0.若axy-3x=y，则a的值是( )
A. B.- C. D.-
三、通过估算比较大小:(每小题6分，共12分)
1.与; 2.与.
四、计算:(每小题5分，共30分)
1.;2.;3.
4.(-1)(+2); 5.(2-)2; 6.(+1)2002(-1)2003.
五、一个长方体的长为5cm、宽为2cm、高为3cm，而一个正方体的体积是它的3倍.求这个正方体的棱长(结果精确到0.01cm).(10分)
六、计算:(13分)
=______，=______，=______，=______，
=______，=______，=______.
根据计算结果，回答：
1.一定等于a吗?你发现其中的规律了吗?请你用自己的语言描述出来.
2.利用你总结的规律，计算=______.
参考答案：
一、1.±， 2.-，- 3.103.2 4.-1,0,1,2 5.(1)8.8或8.9;(2)-4或-5
二、1.B 2.A 3.C 4.B 5.A
三、1.∵≈=0.244，
≈=0.207，
∴>.
2.∵<6，>10，
∴<.
四、1.5× 2.
三、解答题
15.若，求的值。
16.若一个偶数的立方根比2大，平方根比4小，则这个数可能是多少?
17.一个正方体木块的体积是125cm3,现在将它锯成8个同样大小的正方体小木块，求每个小正方体木块的.表面积。
18.若与互为相反数，求的值。
19.若x、y都是实数，且y=++8，求x+3y的立方根.
20.观察下列各式及验证过程：
验证：
=验证：
验证：
(1)按照上述三个等式及其验证过程的基本思路，猜想的变形结果并进行验证;
(2)针对上述各式反映的规律，写出用n(n≥2的自然数)表示的等式，并进行验证.
参考答案：
1.B2.A3.D4.D5.A6.D7.B8.D9.10.0,111.16
12.13.14.9
15.解：由，知
16.10或12或14
17.解：小正方体的体积为cm3，边长为cm，
所以每个小正方体木块的表面积为cm2.
18.解：由与互为相反数，知，得
19.解：由题意知，，x+3y的立方根为3.
20.(1)验证略
(2)验证略
篇5：八年级英语上学期期末检测试题及答案
一、听力部分(每小题1分，满分20分)
(一)听句子，选出正确的应答语。(句子读一遍)
1. A. Oh, it’s hard. B. By listening to the radio. C. I’ve learned a lot that way.
2. A. Yes, I do. B. No, I didn’t. C. I think so.
3. A. It’s hers. B. They must be Tom’s. C. Yes, they are.
4. A. He was very short. B. He liked football very much.
C. He was very sad.
5. A. Yes, I did. B. I took a bus. C. I remember.
(二)听对话，选择最佳答案。(对话读两遍)
6. What’s the price of the T-shirt?
A. 5 yuan. B. 10 yuan. C. 20 yuan.
7. What color does Tom like better?
A. Red. B. Blue. C. Yellow.
8. Why did Mr Smith go to Nanjing?
A. To visit a factory. B. To give a talk. C. To have a holiday.
9. What kind of music does Linda like?
A. Rock music. B. Country music. C. Light music.
10. What does the man’s answer mean?
A. The woman can’t sit beside him.
B. The woman can sit beside him.
C. Someone else will sit beside him.
(三)听对话，选择最佳答案。(对话读两遍)
11. When does Xiao Ming get up every morning?
A. At 5: 30 a.m. B. At 6: 00 a.m. C. At 6: 30 a.m.
12. Why does Xiao Ming get up so early every morning?
A. Because he wants to do some exercise.
B. Because he wants to memorize some English words.
C. Because he wants to memorize and recite something.
13. Who gets up as early as Xiao Ming every morning?
A. His father. B. His mother. C. Nobody.
14. How does Xiao Ming spend his spare time?
A. By playing football. B. By reciting something.
C. He has no spare time at all.
15. What’s the possible relationship (关系) between the two speakers?
A. Teacher and student.
B. Reporter and student.
C. Mother and son.
(四)听短文，根据其内容填写表格。(短文读两遍)
In the past Nowadays
ffood few fruits and 16._____________ all kinds of food clothes wore 17._____clothes during the Spring Festival can wear new clothes relaxation 18._________ cards go 19.__________ or do some 20.__________
16. _______ 17. _______ 18. _________ 19. _________ 20.________
二、单项填空(每小题1.5分，满分15 分)
21. Today the young should still _______ Comrade Lei Feng and serve the people.
A. learn from B. leave away
C. make up D. move down
22. — We’re all here ________ Lily. Where’s she?
— She’s gone to the library.
A. beside B. besides C. except D. of
23. All the Chinese people take _________ our achievement.
A. pride B. proud of C. pride in D. proud in
24. (2015•长春)We will go camping in the mountains________ it rains tomorrow.
A. unless B. but C. or D. so
25. It’s _________ cold today, but I have still finished _________ homework.
A. too much; too much B. much too; much too
C. too much; much too D. much too; too much
26. Rose likes music _________ is quiet and gentle.
A. when B. that C. where D. who
27. Sam enjoys _________ stamps. And now he has 226 of them.
A. to collect B. collected C. collects D. collecting
28. His parents were worried that he _________ too much time chatting online.
A. spent B. cost C. paid D. had
29. Potato chips _________ by mistake about a hundred years ago are very popular now.
A. invent B. invented C. are invented D. were invented
30. —Sally, your Chinese is very good. _________ have you been in China?
—Since I was six.
A. How long B. How far C. How soon D. How often
三、完形填空(每小题1分，满分10分)
Stone is all around us. Stone is usually very hard, 31 it can also be soft. Stones have many uses.
In some 32 , artists carve (雕刻) beautiful things out of soft stones, because they can be shaped easily. In ancient times，people carved 33 persons or animals out of soft stones, which could be carried along with. While in some European countries, statues (雕塑) are carved
34 hard stones and they do not change easily. In summer, the hot sun 35 on these statues and in winter the snow falls on them, but they 36 remain beautiful.
Stone is strong and long-lasting. So, it is 37 enough for buildings. A house built of stone does not catch fire as easily as 38 made of wood. Some stones are coloured, so they make the 39 look wonderful. People can also get a fire with stones. Besides, some kinds of stones can be used to 40 jewellery (珠宝). We’ve found stones are really amazing.
31. A. and B. but C. or D. so
32. A. countries B. cities C. factories D. parks
33. A. young B. old C. small D. big
34. A. into B. of C. for D. from
35. A. shines B. drops C. puts D. fits
36. A. even B. still C. never D. often
37. A. good B. big C. long D. old
38. A. this B. none C. one D. it
39. A. stones B. buildings C. fire D. wood
40. A. find B. sell C. buy D. make
四、阅读理解(每小题2分，满分20分)
A
Do you know the biggest tree in the world? Its name is General Sherman. General Sherman is growing on the slope (斜坡) of the Rocky Mountains in the United States. General Sherman is about 11 metres across and about 35 metres round, and this will give you an idea of General Sherman’s size. General Sherman is also very tall. It is over 80 metres high. It began as a tiny seed (小种子) many years ago. Imagine! It has been growing since about 2000 BC. It has been growing for over 4,000 years and it is still growing! General Sherman is as old as the Pyramids (金字塔). It may live for another 2,000 years. What will the world be like in 4000 AD?
41. The name of the biggest tree in the world is _________.
A. the Great Wall B. General Sherman
C. the Great Pyramid D. an orange tree
42. It’s over _________ metres high.
A. 11 B. 35 C. 80 D. 25
43. It has been growing for over _________ years.
A. 400 B. 4,000 C. 40,000 D. 2,000
B
A famous teacher was speaking to the students at our school. He began his lesson by holding up a￥100 bill. Then he said to the three hundred students, “Who would like this ￥100 bill?” The students began to put up their hands at once.
Then he said, “I’m going to give this ￥100 to one of you, but first, let me do this.” He then made the bill into a ball. Then he said, “Who wants it now?” The hands went back into the air.
“Well,” he said, “what if I do this?” And he dropped it on the floor and stepped on it. He picked up the dirty, crumpled bill and said, “Who still wants it?” Hands went back into the air.
“My friends,” he said, “you have learned a valuable lesson today. No matter what I did to the money, you still wanted it because it did not go down in value. It was still worth ￥100!”
Many times in our lives, we are dropped, crumpled, and stepped on by the chance we take and the things that happen to us. We feel as if we are worth nothing. But remember, no matter what has happened to you, you will never lose your value: you are always valuable to choose people who love you. Your value doesn’t come from what you do or whom you know, but WHO YOU ARE.
You are special and valuable. Don’t forget it.
44. Even though it was dirty, the money _________.
A. still went up in value B. was worth nothing
C. didn’t go down in value D. was still ours
45. We are always valuable to the people _________.
A. who pay us B. who call us
C. who hate us D. who love us
46. Your value doesn’t come from what you do but ______.
A. who you know B. who made you
C. who you remember D. who you are
47. The sentence “Hands went back into the air.” means _________.
A. the students put up their hands again
B. the students put down their hands
C. the students put their hands behind their backs again
D. the students put their hands in front of them
C
Akuapem is in the eastern part of Ghana. The sun there shines all the time. The local people are very friendly and hospitable(好客的).Now let’s have a look at how Akuapem people receive a visitor.
A visitor is often welcomed warmly in a family of Akuapem. After the visitor is welcomed into the house, he is offered a seat and water at the very beginning, because the host assumes that the visitor must have come from a very long journey and need water. If there is a group of visitors, the host will greet the visitors from right to left. And the host shakes only with his right hand, because Akuapem people think the left hand is not clean.
Next, the visitor is asked how his journey was and why he has come. While the conversation is going on, the wife and the children, especially girls, are preparing food for the visitor. The visitor can choose his favorite food. After the visitor finishes eating, the host and the visitor go on with their conversation. Usually this is a short one because the visitor is getting ready to say goodbye.
When the visitor is leaving, he is often given some food. He is also accompanied(陪伴) by one of the children to the nearest station. The child who accompanies the visitor will not come back home until the visitor leaves safely.
Whether he is a close friend or just a stranger, this is always how friendly Akuapem people receive a visitor.
48. The underlined word “assumes” here probably means “_________”.
A. thinks B. remembers
C. disagrees D. follows
49. Which of the following is TRUE according to the passage?
A. The host talks little with the visitor.
B. The child accompanies the visitor to the gate of the house.
C. The host offers the visitor a seat only.
D. The visitor takes some food with him when he leaves.
50. From the passage we know that Akuapem people are _________.
A. noisy B. friendly C. impolite D. quiet
五、补全对话(每小题1分，共5分)
根据对话内容，从方框内选择恰当的句子将对话补充完整。
A. How are you going to spend the winter holidays?
B. Yes, I think so.
C. How are you?
D. What courses?
E. Why do you choose these two courses?
A: Good afternoon, Mr. White.
B: Good afternoon. 51
A: Fine, thanks. And you?
B: I’m fine, too. The school term is nearly over. 52
A: I’m going to take courses(课程)in a winter school.
B: 53
A: English and computer.
B: 54
A: Because English and computer are getting more and more important in our life.
B: 55 I hope you will work hard at them.
51. ______ 52. ______ 53. ______ 54. ______ 55. ______
六、根据汉语意思完成句子(每小题2分，满分10分)
56.你应该把它们写下来。
You should __________ ___________ ____________.
57.你究竟在房间里做了些什么呢?
What ________ ________ did you do in your room?
58.这只狗自从十年前就已经死了。
The dog _________ ___________ __________ since ________ ________ ________ .
59.鲁迅的小说使他闻名于全世界。
Lu Xun’s novels __________ ___________ ___________ all over the world.
60.莫扎特除了写歌剧之外还写了什么?
What did Mozart write _________ ___________ ___________ operas?
七、书面表达(满分20分)
假如你是李华，将于今年12月参加中英中学生文化交流(the cultural exchange between Chinese and English middle school students)。你将寄宿在英国Brown夫妇家里，请你给他们发一份e-mail，简单介绍一下自己的情况，如：年龄、家庭、所在学校、所学课程、兴趣爱好等，并请他们给你的信箱marlene642回复，简要介绍他们自己，因为你也想早些了解他们。词数：100左右。
篇6：八年级英语上学期期末检测试题及答案
1～5 BCBAA 6～10 CBBCB 11～15 BCBCB
16. vegetables 17.new 18.played 19. traveling 20. sports
21. A 句意为“现在，年轻人仍然应该向雷锋同志学习并为人民服务”。learn from意为“向……学习”。
22. C beside“在……旁边”;besides“除了……，还”，包括其后的内容;except“除了”，除去其后的内容;of“……的”，表示所属关系。由答语句意“她去了图书馆”可知莉莉不在这里，故应从整体中排除，故选C。
23. C take pride in意为“以……为自豪”。
24. A unless意为“除非”;but意为“但是”;or意为“否则”;so意为“所以”。“我们将去山里野营”和“明天下雨”之间存在逻辑关系，符合常理的理解应为“如果明天不下雨，我们将去山里野营”。unless相当于if not，在此引导条件状语从句。句意：除非明天下雨，否则我们将去山里野营。故选A。
25. D much too意为“太”，可修饰形容词;too much意为“太多”，修饰不可数名词。
26. B 句意：罗丝喜欢轻柔的音乐。本题考查定语从句。作music的定语的从句缺少主语，故选择指物的关系代词that。
27. D 句意：萨姆喜欢集邮，现在他已经收集了226枚邮票。本题考查动词的-ing形式作宾语。enjoy后接动词的-ing形式作宾语。
28. A 句意：他的父母很担心他花费在上网聊天的时间太长。本题考查动词的辨析。have不作“花费”讲;cost作“花费”讲时以物作主语;pay作“花费”讲时不接动词的-ing形式。sb. spend(s) some time (in) doing sth.意为“某人花费时间做某事”。
29. B 句意：大约一百年前偶然被发明的炸薯片现在非常受欢迎。故此处应用过去分词作后置定语，修饰potato chips，表示被动。
30. A how long意为“多长时间”。
31. B 由句意“石头通常很坚硬但它也可能很柔软”可知选B。
32. A 由句意“在一些国家，艺术家们把柔软的石头雕刻成一些漂亮的东西……”可知选A。
33. C 由下文中的which could be carried along with可知，能被携带的应是小的东西，故选C。
34. D 由“然而，在一些欧洲国家，雕塑是刻在硬的石头上”可知选D。
35. A 由 “在夏天，炙热的太阳光照射在这些雕塑上”可知选A。
36. B 由 “在冬天，大雪落在上面，但它们仍然很美丽”可知选B。
37. A 由句意“石头坚固而持久，因此用于建筑物非常好”可知选A。
38. C 由句意“和木房相比石房不易失火”可知选C。
39. B 由句意“一些石头五颜六色，因此制造的建筑物看起来很漂亮”知选B。
40. D 由句意“另外，有些石头被用于制造珠宝”知选make。
41. B 由文中第一、二句Do you know the biggest tree in the world? Its name is General Sherman.可知答案。
42. C 由文中的It is over 80 metres high.可知答案。
43. B 由文中的It has been growing for over 4,000 years and it is still growing! 可知答案。
44. C 由短文第四段最后一句话It was still worth ￥100!可知选C。
45. D 由短文倒数第二段倒数第二句话But remember, no matter what has happened to you, you will never lose your value: you are always valuable to choose people who love you.可知选D。
46. D 由短文倒数第二段最后一句话Your value doesn’t come from what you do or whom you know, but WHO YOU ARE.可知选D。
47. A 通读全文可知应选A。
48.A由上文文意“在客人被迎进屋之后，首先提供的是座位和水”可知，此处文意为“因为主人认为客人一定经过长途跋涉，需要水”，故选A。
49.D由短文第三段中的When the visitor is leaving, he is often given some food.“当客人离去时，他通常被赠送一些食品。”可知D项正确。
50.B 由短文第一段中的Akuapem is in the eastern part of Ghana.以及The local people are very friendly and hospitable.可知，他们非常友好和好客，故选B。
51. C 由答语可知用How are you?
52. A 由答语可知询问寒假计划。
53. D 询问学习什么课程。
54. E 答语Because...说明用why提问。
55. B Yes, I think so.是肯定对方的观点或意见。
56. write them down 57. on earth 58. has been dead, ten years ago
59. made him famous 60. in addition to
One possible version:
Dear Mr. and Mrs. Brown,
I’m a Chinese boy. My name is Li Hua. I’m very happy to know that I’ll stay in your house for the cultural exchange between Chinese and English middle school students. I’d like to say something about myself so that you can know me well. I’m sixteen years old. I have a happy family with three people. I’m studying in No. 1 Middle School. We learn eight subjects. I’m interested in all of them. I like reading and playing the piano. I like English very much, but my English is not good enough. I think you can help me with my English.
Besides, I hope to know more about you earlier, so would you please make a reply tomarlene642?
Yours,
Li Hua
篇7：八年级数学四边形检测试题参考
八年级数学四边形检测试题参考
绵阳市三台县潼川中学
(时间：90分钟满分100分)
一.选择题(每题3分，共计30分)
1.已知正方形的边长为4cm，则其对角线长是………………………………………
A.8cmB.16cmC.32cmD.4cm
2.用两个全等的直角三角形拼下列图形：①矩形;②菱形;③正方形;④平行四边形;⑤等腰三角形;⑥等腰梯形，其中一定能拼成的图形是………………………………()
A.①②③B.①④⑤C.①②⑤D.②⑤⑥
3.下列命题中，真命题是…………………………………………………………()
A、有两边相等的平行四边形是菱形B、有一个角是直角的四边形是矩形
C、四个角相等的菱形是正方形D、两条对角线互相垂直且相等的四边形是正方形
4.矩形、菱形、正方形都具有的性质是…………………………………………()
A、对角线相等B、对角线互相平分C、对角线互相垂直D、对角线平分对角
5.关于四边形ABCD①两组对边分别平行;②两组对边分别相等;③有一组对边平行且相等;④对角线AC和BD相等;以上四个条件中可以判定四边形ABCD是平行四边形的有()。
(A)1个(B)2个(C)3个(D)4个
6.在等腰梯形中，下列说法：①两腰相等;②两底平行;③对角线相等;④同一底上的两底角相等，其中正确的有…………………………………………()
A.1个B.2个C.3个D.4个
7.若顺次连结四边形ABCD各边中点所得四边形是矩形，则四边形ABCD必定是()
A、菱形 B、对角线相互垂直的四边形
C、正方形 D、对角线相等的四边形
8.如图所示，将一张正方形纸片对折两次，然后在上面打3个洞，则纸片展开后是()
9.如图，在梯形ABCD中，DC∥AB，将梯形对折，使点D、C分别
落在AB上的`点、，折痕为EF，若CD=3cm，EF=4cm，则
+为()
A.2cmB.3cmC.4cmD.5cm
10.如图，矩形ABCD中，DE⊥AC于E，且∠ADE：∠EDC=3：2，则∠BDE的度数为()
A、36oB、9o
C、27oD、18o
二.填空题(每题3分，共计21分)
11.平行四边形ABCD中，∠A=500，AB=30cm，则∠B=____，DC=____cm。
12.平行四边形ABCD的周长为20cm，对角线AC、BD相交于点O，若△BOC的周长比△AOB的周长大2cm，则CD=cm。
13.若边长为4cm的菱形的两邻角度数之比为1∶2，则该菱形的面积为cm2。
14.菱形的两条对角线分别是6cm，8cm，则菱形的边长为_____cm，面积为______cm2.
15.在等腰梯形ABCD中，AD∥BC，AD=6cm，BC=8cm，∠B=60°，则AB=_______cm.
16.等腰梯形两底之差为12cm，高为6cm，则其锐角底角为度.
17.如右图，若梯形的两底长分别为4cm和9cm，两条对角线长分别为5cm和12cm，则该梯形的面积为cm2。
三、解答题(本题4个题，共计49分)
18.(本题12分)已知：如图，在梯形ABCD中，AD∥BC，AB=8cm，∠B=60度，∠C=45度，AD=5cm.
求：(1)CD的长;
(2)梯形ABCD的面积.
19.(本题12分)已知：如图，□ABCD各角的平分线分别相交于点E，F，G，H，
求证：四边形EFGH是矩形.
20.(本题12分)如图，在菱形ABCD中，∠ABC与∠BAD的度数比为1：2，周长是48cm.求：
(1)两条对角线的长度;(2)菱形的面积.
21.(本题13分)如图，梯形ABCD中，AD∥BC，M、N、P、Q分别为AD、BC、BD、AC的中点。求证：MN和PQ互相平分。
篇8：七年级数学上册第二章基础检测试题
七年级数学上册第二章基础检测试题
一、选择题
1、下列叙述正确的是()
(A)有理数中有最大的数.(B)零是整数中最小的数.
(C)有理数中有绝对值最小的数.(D)若一个数的平方与立方结果相等，则这个数是0.
2、下列近似数中，含有3个有效数字的是()
(A)5430.(B)5.430×10(C)0.5430.(D)5.43万.
3、已知两数相乘大与0,两数相加小于0,则这两数的符号为()
(A)同正.(B)同负.(C)一正一负.(D)无法确定.
4、若-2减去一个有理数的差是-5，则-2乘这个有理数的积是()
(A)10.(B)-10.(C)6.(D)-6.
5、算式(--)×24的值为()
(A)-16.(B)16.(C)24.(D)-24.
6、已知不为零的`a,b两数互为相反数，则下列各数不是互为相反数的是()
(A)5a与5b.(B)a与b.(C)与.(D)a与b.
7、按下面的按键顺序在某型号计算器上按键：
显示结果为()
(A)56.25.(B)5.625.(C)0.5625.(D)0.05625.
8.某城市按以下规定收取每月煤气费，用煤气不超过60立方米，按每立方米0.8元收费;如果超过60立方米，超过部分按每立方米1.2元收费.已知甲用户某月份用煤气80每立方米，那么这个月甲用户应交煤气费()
A.64元B.66元C.72元D.96元
9.3是3的近似值，其中3叫做真值，若某数由四舍五入得到的近似数是27，则下列各数中不可能是27的真值的是()
A.26.48B.26.53C.26.99D.27.02
10.小华和小丽最近测了自己的身高，小华量得自己约1.6m，小丽测得自己的身高约为1.60m，下列关于她俩身高的说法正确的是()
A.小华和小丽一样高B.小华比小丽高C.小华比小丽低D.无法确定谁高
二、填空题
11.-的倒数是;-的相反数是，-的绝对值是;
-的平方是.
12、比较下列各组数的大小：
(1);(2)--;
(3)-2(-2);(4)(-3)-3.
13、(1)近似数2.5万精确到位;有效数字分别是;
(2)1纳米等于十亿分之一米，用科学记数法表示25米=纳米.
14.数轴上表示有理数-3.5与4.5两点的距离是.
15.(-1)2+(-1)3+…+(-1)2010=.
16.李明与王伟在玩一种计算的游戏，计算的规则是||=ad-bc,李明轮到计算||，根据规则||=3×1-2×5=3-10=-7，，现在轮到王伟计算||，请你帮忙算一算，得.
17、我国著名数学家华罗庚曾经说过这样一句话：“数形结合百般好，隔裂分家万事休”.
如图,在一个边长为1的正方形纸板上,依次贴上面积为,,,,…,的小长方
形纸片，请你写出最后余下未贴部分的面积的表达式：.
18.a是不为1的有理数，我们把称为a的差倒数.如：3的差倒数是=-，-1的差倒数是=.已知a1=2，a2是a1的差倒数，a3是a2的差倒数，a4是a3的差倒数，…，依此类推，则a2010=。
八年级上学期数学第二章检测试题及答案（精选8篇）
