篇一：启航新课堂七年级数学上册3单元t-ment
启航新课堂单元测试
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第三章字母表示数
（总分：150分；时间： 100 分）
姓名学号 成绩
一、选择题（每小题3分，共30分）
1．用代数式表示“2m与5的差”为（ ）
Ａ．2m?5 Ｂ．5?2m Ｃ．2(m?5)Ｄ．2(5?m) 2
．某商场2006年的销售利润为a，预计以后每年比上一年增长b%，那么2008年该商场的销售利润将是（ ）
A．a?1?b? B． a?1?b%? C．a?a??b%? 222 D．a?ab2
3．当x?2时，代数式2x?3的值为（ ）
Ａ．1 Ｂ．?1Ｃ．5 Ｄ．3
4．下列各组中的两项不属于同类项的是（ ）
A．3m2n3和?m2n3
xy和25xy5
1C．－1和4B．
D．a2和x3
A．3a?2b?5ab B．5y?3y?2
C．7a?a?7a2 D．3x2y?2yx2?x2y
6．化简?0?(x?3y)?的结果是（ ）
A．x?3y B．?x?3y C．?x?3y D．x?3y
7．一个长方形的周长为30，若长方形的一边长为x，则此长方形的面积是（ ）
Ａ．x(15?x) Ｂ．x(30?x)Ｃ．x(30?2x) Ｄ．x(15?x)
8．若a?b,b?2c，则a?b?2c等于（ ）
Ａ．0Ｂ．3 Ｃ．3a Ｄ．?3a
9．为了做一个试管架，在长为acm(a?6cm)的木板上钻3个小孔（如图），每个小孔的直径为2cm，则x等于（ ） a?3a?3Ａ．cmＢ．cm 44
a?6a?6Ｃ．cmＤ．cm 44第9题图
10．若代数式(m?2)x2?5y2?3的值与字母x的取值无关，则m的值是（ ）
A．2B．－2 C．－3D．0
二、填空题（每小题3分，共30分）
11．x平方的3倍与?5的差，用代数式表示为 ；当x??1时，代数
式的值为．
12．正方体的棱长为a，则它的表面积为 ；若a?2cm，则表面积为 ．
13．某班a名同学参加植树活动，其中男生b名(b?a)．若只由男生完成，每人
需植树15棵；若只由女生完成，则每人需植树 棵．
1114．一根钢筋长a米，第一次用去了全长的，第二次用去了余下的，则剩余32
部分的长度为 米．（结果要化简）
15．代数式5m?2的实际意义可表示
为 ．
1?x2
16．当x??1时，代数式的值是 2(1?x) ．
17．合并同类项：①15x?4x?10x?；②
?p2?p2?p2?．
18．?6x?7y?3的相反数是．
19．代数式a2?a?3的值为7，则代数式2a2?2a?3的值为．
20．用黑白两种颜色正方形的纸片按黑色纸片数逐渐加l的规律拼成一列图案：
（1）第4个图案中有白色纸片张；
（2）第n个图案中有白色纸片张．
三、解答题(共40分)：
21．化简（每小题4分，共16分）：
2（1）?9y?6x2?3(y?x2)； （2）5(a2b?3ab2)?2(a2b?7ab2)； 3
22222??7x?(4x?3)?2x5a?a?(5a?2a)?2(a?3a)?（3）3x2??； （4） ????．
3522．（6分）先化简，再求值：m?(m?1)?3(4?m)，其中m??3． 22
23．（8分）（1）根据下列条件，分别求代数式4(x?y)?5(x?y)?11(x?y)的值：
①x?3,y?1；②x?0,y??2；③x??0.5,y??2.5；
（2）观察上述计算结果，请你给出一组x,y的值，使得上述代数式的值与
（1）中①的计算结果相同．
24．（10分）初一年级学生在5名教师的带领下去公园秋游，公园的门票为每人
30元.现有两种优惠方案，甲方案：带队教师免费，学生按8折收费；乙方案：师生都7.5折收费.
（1）若有m名学生，用代数式表示两种优惠方案各需多少元？
（2）当m?70时，采用哪种方案优惠？
（3）当m?100时，采用哪种方案优惠？
篇二：启航新课堂七年级下册英语答案
启航新课堂七年级下册英语答案 单项选择 BCABDBBBAACDABC 完形填空 AADBCBADCB 阅读理解 CDABA TFFFF 补全对话 This is Peter. Are you free this tomorrow? Are you free this Sunday? Yes,I'd love to I'll call here 词汇 speak carry flying cook afraid 汉译英 This call about would have a picnic What up go fishing Section A Ⅰ1.unday2.orget3.free4.kite5.ring Ⅱ1.to go2.shopping3.toke4.Are5.us Ⅲ1.Please tell him about the picnic2.Don't dorget to bring your guitar3.Would you to go fishing4.What do you thing of this green skirt5.Are you free this Sunday Section B Ⅰ1.CDEAB Ⅱ1.DDBAA ⅢFGCEB Section C Ⅰ1.to have a picnic with2.very happy3.going fishing4.afraid have no5.ask to call back ⅡWould like to visit 2.What would you 3. don't have 4.Does have 5.want to Ⅲ JBACEIDGHF Section D Ⅰ1.calls2.shopping3.songs4.you5.having6.tell Ⅱ1.Would 2.can3.can 4.May5.Would Ⅲ1.What about cook 2.at home 3.like 4.Who are 5.can't see any
篇三：启航新课堂七年级下册英语试题
启航新课堂七年级下册英语试题
一）单项选择
1. Let’s ____ after school.
A. to play basketball B. play basketball C. play a
2. ____ see the giraffes.
A. Let B. Let we C. Let’s
3. --- _____ do you like animals?--- _____ they are cute.
A. Why, Because B. Why, So C. What, Because
4. Do you want _____?
A. eat rice B. to eat riceC. to eat rices
5. A: Let’s see the monkeys first.
B: _________?
A: Because they’re interesting.
A. WhyB. What C. Where
6. _________ these tigers _______ from?
A. Where, are B. Where, come C. Where are, /
7. I like koalas because they are _________ friendly.
A. a kind of B. kind of C. kinds of
8. —Where is he ___________? —South Africa.
A. for B. fromC. like
9. --_______ he ________ breakfast at home? -- Yes.
A. Dose, have B. Does, haveC. Does, has
10. _____ pandas from China?
A. Are B. Is C. Do
11.The elephants are______great danger in Africa.
A.are B.is C. does D.do
12. I like_______, but this afternoon I don’t like_______.
A.swimming;swimming B.to swim; to swim
C.swimming; to swimD. to swim; swimming
13.The trees are green. Don’t______
A. cut down them B. cut them up
C. cut them dowm D. cut up them
14. One of the boys________pet. The pet is really cute.
A. have B. has C. keep D. save
(二)连词成句。
1. lions, the, let, first, see, us
__________________________________________________________.
2. pandas, why, want, see, to, do, the, you
________________________________________________________?
3. they, are, ugly, because
________________________________________________________.
4. South Africa, lions, from, are, those
_________________________________________________________.
（三）按要求完成句子
1. I like monkeys because they are cute. （就划线部分提问）______ ______ you like monkeys?
2. us let pandas see. (连词成句)_____________________________________________
3. do you tigers why like ? （连词成句）___________________________________
4. The koala comes from Australia.(变否定句)
The koala ________ ________ from Australia.
5. He likes pandas very much.(变一般疑问句)
_______ he ________ pandas very much?
6. The beautiful girl wants to see giraffes.(对划线部分提问)
________ ________ does the shy girl want to see?
7. Pandas are from China.(同义句转换)
Pandas _________ ________ China.
（四）阅读理解
A
There is an elephant and a monkey.They’re friends, but one day they want to know who is stronger（更壮）. One of them says, “Who can get apples over there, who is stronger.”
There’s a river over there. Monkey says, “I can’t swim.” Elephant says, “I can swim. Please sit on my back.” They go across the river. The apple trees are very high. The elephant can’t reach（够着）the apples. The monkey climbs（爬）up the tree and gets many apples.
Now they know they should help each other.
根据短文内容选择最佳答案。
()1.The elephant and the monkey want to know _____.
A.who is smarterB.who is higherC.who can swimD.who is stronger
()2.______ can’t swim.
A.The elephantB.The monkeyC.The big animalsD.The small animals
()3.______ can’t reach the apples.
A.The elephantB.The monkeyC.The high animalsD.The short animals
()4.At last the monkey goes across the river with the help of ______.
A.the elephantB.the monkeyC.an animalD.a boat
()5.From the story we should _______.
A.learn from the elephantB.learn from the monkey
C.A and BD.help each other
B
Handan comes from China, she is a clever and beautiful girl. She studies in a middle school. She has four pen pals. They are from different countries and like different animals. Linda is from America. Her favorite animal is the penguin. The penguin likes ice very much. Lily comes from Australia. The koala is her favorite animal. The koala likes to eat leaves. And it sleeps during the day, but it gets up at night. Bob is from India. His favorite animal is the elephant. Grass is the elephant’s favorite food. Tom is a Canadian boy. He likes the tiger best. The tiger likes to eat meat. What is Handan’s favorite animal? It is the panda. Bamboo is panda’s favorite.
Name
Country
Favorite animal
What do the animals like?
Handan
1._________
Panda
2.__________
3.________
America
4.__________
ice
5.________
Australia
koala
6.___________
Tom
Canada
7.___________
8.___________
9._________
India
10.__________
grass
C
People come back to their homes to spend the day with their parents or their children. On Christmas Day bells ring everywhere. The ringing bells tell people Christmas is coming. People sing and dance day and night. They have a good time.
Most families buy a Christmas tree for their children. And there are some presents hanging(挂)from the tree here and there. People also put presents in children’s stockings. In many places, Father Christmas himself brings presents to them. He is a kind man and in red clothes. There is a big bag on his back. In it there are a lot of presents.
Christmas is also a day when people enjoy all kinds of food. But some poor people have no homes and have no food to eat. They die of cold and hunger（饥饿）on Christmas Day.
根据短文内容判断正(T)误(F)。
()1.Chrismas is a very important day in English-speaking countries in a year.
()2.All people have a good time on Christmas Day.
()3.Father Christmas wears red clothes.
()4.There are a lot of Christmas trees in Father Christmas’ bag.
()5.Some poor people die on Christmas Day because they have no homes and no food to eat.
（五）从方框中选择最佳选项完成对话.
A. ChinaB. Because they are cute.
C. OK. Let’s go.D. They are next to the giraffes.
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