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M2练习题

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M2练习题
一、找出下列单词中不同类的一项。

( ) 1. A.lived B.cooked C.have D.were
( ) 2.A.radio B.house C.telephone D.television
( )3.A.fire B.day C.week D.month
( )4. A.driver B.write C.teacher D.dancer
( )5. A.teach B.dance C.good D.study
二、在II 栏中找出I 的相应的答语，并把序号写在括号内。

I II
（）1. What did she do ? A.Yes ,I did.
（）2. Did she make a cake? B.No, she didn’t.
（）3.Did you make a cake? C.Yes,it is.
（）4. Is this your grandpa? D.She made a cake.
（）5.What’s she doing ? E. She is cooking vegetables.
（）6. Did she learn any foreign languages ? F.Yes. She learnt English.
三、根据句意，选择填空。

Ten years ago, Miss Ma _______ (is,was) a teacher.She_____(teach,taught) Chinese. Mary _____(were,was) in her _______.(home,class)She was a good pupil. She____ (studied,studies) very hard.Now, Miss Ma ____ (is,was) retired. She’s______(learnt, learning) English. Mary_______(is,was) an English teacher. She’s ________ (teach, teaching) Miss Ma.
四．选择正确的单词，完成问句who , what , where, do, did
1.--- _______were you last night?--I was at school
2.---________is the old lady?---She’s my grandma.
3.---________ ________she do yesterday? --She learnt English.
4.---__________they watch TV every day? --- No, they don’t.
五、单项选择
1（）_______this? It’s my grandpa. A Whose B Who’s C What’s
2.( )Lingling _____ hard in our school last year. A. studyed B.studied C.study
3 ( )Did they ____ English?Yes, they____English many years ago.
A learn, learnt
B learnt, learn
C learnt, learnt
4 ( ) Did your mother learn ____ foreign languages? A. little B any C little
5.( ) Did Mr Black learn Chinese?______
A No.he didn’t.
B Yes, he didn’t.
C Yes,she did.
6.( ) What does your sister do?She is a _________. A drive B dance C dancer
7. ( )Yesterday I ____ a cake. A make B made C maked
8. ( ) Tim _____ a doctor many years ago. A is B were C was
9. ( ) _____ Jack learn Chinese? No,he didn’t. A Does B What C Did
10. ( ) Mary is ______ to music now. A listened B listening C listen
六、阅读短文，判断正误。

正确的写”T”，错误的写”F”。

My hometown(家乡) is a beautiful place.It has many tall buildings and wide strees. Wherever you go ,you may see flowers and t rees. But it hasn’t always been like that when I was a little girl. It was a dirty town.Some people lived in small house. They didn’t have enough food. They didn’t have televisions or computers. Great changes have taken place in my hometown these years. There are lots of buses and cars. The people live in a big house. We have got lots of food… I love my hometown. I love its people. I am sure that my hometown will have an even brighter future.
( ) 1.Many years ago, my hometown is beautiful place.
( ) 2. Many years ago. The people have enough food.
( ) 3.Now there are many buses and cars.
( ) 4.Now there are many tall buildings.
( ) 5.My hometown isn’t a nice place.。

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(人教PEP版 )三年级英语下册同步练习 Unit 2 My family A部分习题(学生版+教

(人教PEP版 )三年级英语下册同步练习 Unit 2 My family A部分习题(学生版+教

Unit 2 A部分同步课时练（1）一、选出每组中不同类的一项。

()1. A. man B. she C. woman()2. A. who B. where C. water()3. A. that B. is C. are()4. A. father B. dad C. that()5. A. mother B. meet C. sister二、写出下列句子中画线单词的对应词补全句子。

1. This is a crayon. _________ is a pencil.2. The woman is Miss Liu. The _________ is Mr Smith.3. Tom’s father is from the UK. But his _________ is from the USA.4. She's my grandmother. He's my _________.5. The girl is Amy. The _________ is John.三、圈出下列句子或对话中错误的地方并改正。

1. That is Sarah. She is a pupils._______________________________________________________ 2. -- Who's that woman? -- He is Miss Green._______________________________________________________ 3. I'm from UK._______________________________________________________ 4. What is the boy from?_______________________________________________________ 5. -- Who's that man? -- She is my new teacher._______________________________________________________四、给下列句子选择合适的答句。

七下M2练习题(一)

七下M2练习题(一)

Module 2Unit 1 I can play the piano.一、根据句意及首字母或汉语提示完成单词1. Would you like to play the p_________?2. Who will _______ (教) us this _________ (学期)?3. What is on the __________ (布告栏)?4. I would like to j________ the Piano Club.5. C________ me as your monitor.二、用括号内所给单词的适当形式填空1. Betty likes _________ (draw), but she can’t ______ (play) the piano.2. I’d like ___________ (visit) the Big Ben during the holiday.3. ---Can she dance? ---No, she ________(can).4. Don’t ________ (worry) about your son.5. My pen friend often teaches ______ ( I ) English.6. My father can ________ (cook).7. Betty can speak Chinese really _______ (good).8. ________ (choose) your favourite book.9. Some children are ________ (play) games in the park.10. Ms. Yang often _________ (teach) us to play the piano.三、翻译句子1. 你会打乒乓球吗？Can you _______ _______ ________?2. 那个男孩每天都弹一个小时钢琴。

完全平方公式专项练习题

完全平方公式专项练习题

完全平方公式专项练习专项练习：1（3a －5）2 2．（－2m －3n ）2 3. （a 2－1）2－（a 2＋1）24.（－2a ＋5b ）25.（－21ab 2－32c ）2 6.（x －2y ）（x 2－4y 2）（x ＋2y ）7.（2a ＋3）2＋（3a －2）2 8.（a －2b ＋3c ）（a ＋2b －3c ）；9.（s －2t ）（－s －2t ）－（s －2t ）2； 10.（t －3）2（t ＋3）2（t 2＋9）2．11. 992－98×100； 12. 49×51－2499；13.（x －２y ）（x ＋２y ）－（x ＋２y ）214.（a ＋b ＋c ）（a ＋b －c ）15.（２a ＋１）2－（１－２a ）216.（３x －y ）2－（２x ＋y ）2＋５x （y －x ）17. 先化简，再求值：（x ＋２y ）（x －２y ）（x 2－４y 2），其中x ＝２，y ＝－１.18.已知x －y ＝９，x ·y ＝５，求x 2＋y 2的值.19.(1)已知a ＋b ＝7，ab ＝10，求a 2＋b 2，（a －b ）2的值．(2).已知a （a －１）＋（b －a 2）＝－７，求222b a +－ab 的值.20.(1).已知2a －b ＝5，ab ＝23，求4a 2＋b 2－1的值． (2).已知（a ＋b ）2＝9，（a －b ）2＝5，求a 2＋b 2，ab 的值．(3).已知 2()16,4,a b ab +==求223a b +与2()a b -的值。

21.(1)已知()5,3a b ab -==求2()a b +与223()a b +的值。

(2).已知6,4a b a b +=-=求ab 与22a b +的值。

(3).已知224,4a b a b +=+=求22a b 的值。

(4).已知6,4a b ab +==，求22223a b a b ab ++的值。

计量经济学第二版课后习题答案

计量经济学第二版课后习题答案

计量经济学全部答案（庞浩）第二版 第二章练习题及参考解答2.1 为研究中国的货币供应量(以货币与准货币M2表示)与国内生产总值(GDP)的相互依存关系，分析表中1990年—2007年中国货币供应量（M2）和国内生产总值（GDP ）的有关数据:表2.9 1990年—2007年中国货币供应量和国内生产总值(单位:亿元)资料来源:中国统计年鉴2008,中国统计出版社对货币供应量与国内生产总值作相关分析，并说明相关分析结果的经济意义。

练习题2.1 参考解答:计算中国货币供应量(以货币与准货币M2表示)与国内生产总值(GDP)的相关系数为:计算方法: XY n X Y X Y r -=或 ,()()X Y X X Y Y r --=计算结果:M2GDPM210.996426148646GDP 0.996426148646 1经济意义: 这说明中国货币供应量与国内生产总值(GDP)的线性相关系数为0.996426,线性相关程度相当高。

2.2 为研究美国软饮料公司的广告费用X与销售数量Y的关系,分析七种主要品牌软饮料公司的有关数据表2.10 美国软饮料公司广告费用与销售数量资料来源:(美) Anderson D R等. 商务与经济统计.机械工业出版社.1998. 405绘制美国软饮料公司广告费用与销售数量的相关图, 并计算相关系数，分析其相关程度。

能否在此基础上建立回归模型作回归分析？练习题2.2参考解答美国软饮料公司的广告费用X与销售数量Y的散点图为说明美国软饮料公司的广告费用X与销售数量Y正线性相关。

若以销售数量Y 为被解释变量,以广告费用X 为解释变量,可建立线性回归模型 i i i u X Y ++=21ββ 利用EViews 估计其参数结果为经t 检验表明, 广告费用X 对美国软饮料公司的销售数量Y 确有显著影响。

回归结果表明，广告费用X 每增加1百万美元, 平均说来软饮料公司的销售数量将增加14.40359(百万箱)。