启航新课堂七年级上

1、青，取之于蓝而青于蓝；冰，水为之而寒于水启航新课堂七年级上 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 请支持正版 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（ ） 2m?5 5?2m 2(m?5)2(5?m) 2 某商场2021年的销售利润为a，预计以后每年比上一年增长b%，那么2021年该商场的销售利润将是（ ） aa?1?b? b a?1?b%? ca?a?b%? 222 da?ab2 3当x?2时，代数式2x?3的值为（ ） 1 ?15 3 4下列各组中的两项不

2、属于同类项的是（ ） a3m2n3和?m2n3 xy和25xy5 1c1和4b da2和x3 a3a?2b?5ab b5y?3y?2 c7a?a?7a2 d3x2y?2yx2?x2y 6化简?0?(x?3y)?的结果是（ ） ax?3y b?x?3y c?x?3y dx?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（ ） x(15?x) x(30?x)x(30?2x) x(15?x) 8若a?b,b?2c，则a?b?2c等于（ ） 03 3a ?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

3、?3a?3cmcm 44 a?6a?6cmcm 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（ ） a2b2 c3d0 二、填空题（每小题3分，共30分） 11x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

4、示 为 1?x2 16当x?1时，代数式的值是 2(1?x) 17合并同类项：15x?4x?10x?； ?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)

5、?（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： x?3,y?1；x?0,y?2；x?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

6、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,id love to ill call here 词汇 speak carry flying cook afraid 汉译英 this call about would have a picnic wha

7、t up go fishing section a 1.et3.free4.kite5.ring 1.to go2.shopping3.toke4.are5.us 1.please tell him about the picnic2.dont 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 1.cdeab 1.ddbaa fgceb section c 1.to ha

8、ve a picnic with2.very happy3.going fishing4.afraid have no5.ask to call back would like to visit 2.what would you 3. dont have 4.does have 5.want to jbaceidghf section d 1.calls2.shopping3.songs4.you5.having6.tell 1.would 2.can3.can 4.may5.would 1.what about cook 2.at home 3.like 4.who are 5.cant s

9、ee 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. lets _ after school. a. to play basketball b. play basketball c. play a 2. _ see the giraffes. a. let b. let we c. lets 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

10、ricec. to eat rices 5. a: lets see the monkeys first. b: _? a: because theyre 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

11、. 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 dont like_. a.swimming;swimming b.to swim; to swim c.sw

12、imming; to swimd. to swim; swimming 13.the trees are green. dont_ 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

13、 _? 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

14、. 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.theyre friends, but one day they want to know who is s

15、tronger（更壮）. one of them says, “who can get apples over there, who is stronger.” theres a river over there. monkey says, “i cant swim.” elephant says, “i can swim. please sit on my back.” they go across the river. the apple trees are very high. the elephant cant reach（够着）the apples. the monkey climb

16、s（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._ cant swim. a.the elephantb.the monkeyc.the big animalsd.the small animals ()3._ cant rea

17、ch 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

18、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

19、 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 elephants favorite food. tom is a canadian boy. he likes the tiger best. the tiger likes to eat meat. what is hand

20、ans favorite animal? it is the panda. bamboo is pandas 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 th

21、eir 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 childrens stockings. in many places, father christmas himself brings presents to them. he is a kind man and in red clothes. there