新编实用英语2第三版__课后习题答案

1)美国人一般早早就安排好他们的退休生活。Americans usually make a plane for their retirement

well in advance.

2)他们通常被看成最有希望的歌手。They are commonly regarded as the most promising singers.

3)我从你的推荐人那里听说雇主曾给他们打过电话I have heard from references that your employer had

called them.

4)请告诉我们具体时间，以便我们做好适当的准备。Please inform us the exact time so that we can make

proper arrangements.

5)我们对出席派对人数的估计与实际来的人数差了一大截。Our estimate of how many people would show

up at the party

6)只要不成为阅读负担，你的报告可以包括足够多的细节。Your report can include enough details as long as

it will not be a burden to read.

7)就个人而言，我将永远都习惯不了退休。Personally ,I will never get used to being retired

8)你想找个机会去中国的西南部发现一个神奇又美丽的地方吗？Would you like the chance to discover a

place of mystery and beauty .

9)你学习英文时，会发现把英文句子逐字翻译成自己的母语并不是聪明的办法。When you are leaning

English ，you well find out that it is not clever to translate put the English sentences word for word into your own language .

10)如果我可以重提我们刚才讨论过的问题的话，我认为我们应该尽一切努力保护大熊猫。If I would refer

back to the problem that we were talking ,I think (that) we should try our best to protect panda

11)我们没有一些线索可以串联起来，以便更好的理解这件事。Do we have any clues and hints piece together

so that we could have a better understanding of this matter.

12)请给家里打个电话，告诉他们我正在去公司的路上Please dial home and tell them I am on the way to the

company

13)从那时起生产就没有倒退过。Since then there was never been any setback in production

14)我看见他把钥匙插入锁中、I saw him insert the key into the lock

15)你建议你把钱存入银行。I suggest that you make a deposit the back

16)你可以将这些扬声器和你的激光机连接在起来。You can connect these loud-speakers to your laser player.

17)医疗网可以使病人共享信息和相互给予支持。The medical website enables patients to share information

and offer each other support

18)我很高兴你和我们一起去，你不会因此后悔的。I’m glad you’re going with us ,you won’t regret it

19)那是她所体验过的最奇妙的感觉。It was the most wonderful feeling she had ever experienced

20)他以科普小说而闻名he is known for his popular science novels

21)二十年后他还能清楚的记起这件事。Twenty years later he could still clearly recall the event

22)那首歌总是让我想起我们的第一次约会that song always reminds me of our first date

英汉

1.虽然邀请通常是通过信函的方式发出，但电子邮件和电话邀请与非正式邀请方式越来

越多被人们接受。Although invitations are usually sent through the mail , informal

invitations such as e-mail and phone invitations are becoming more acceptable .

2.尽管他只学习了两年的英语，但现在已经说得非常流利。Although he has only studied

English for two years , he can speak it quite well now .

3.对于大多数正式场合，最好提前三至四星期邀请客人For most formal occasions , its

best to invite guests three or four weeks in advance.

4.最好把一个大蛋糕从中间切开。It’s best to slice into a rich cake from the middle .

5.公司也可以根据自己的喜好选择任何颜色的纸张，只要有利于维护和提高公司的形象

A company can use any color of paper it desires ,as long as it upholds and promotes the

company’s image

6.只要你继续在哪里学习，你的学院或大学将会提供你的教育报告Your college or

university will provide a report about your education as long as you continue to study three 7.或者使用邀请函做下角的地址或电话号码回复，或者用邀请函所附的回复卡回复

Either use the address or phone number printed in the lower left corner of the invitation or return the RSVP card sent with the invitation

8.面试官会问你一些基本的个人问题或让你做一个简短的自我介绍The interviewers will

either ask you some basic questions about yourself or ask you to give a brief self-introduction.

9.如果邀请函上没有说“邀请LOUIS WINTHORP先生和朋友”就不能要求带客人赴宴

never ask to bring a guest unless the invitation states “MR.LOUIS WINTHORP and Guest”

10.除非人们看到更高的标准，否则不会提高自己people will never improve themselves

unless they look to some higher standards

11.如果带上未受到邀请的朋友出席，就会造成让大家都尴尬的局面showing up with an

uninvited friend could turn out to be an embarrassing situation for everyone

12.无论真相是什么，我们都会不计后果的公之于众whatever the facts turn out to be ,we

make them public regardless of the consequences

13.无论那种情况，这都不是互动交流Either way , it’s not an interactive conversation.

14.无论那种情况，没有所需的技术我们都是寸步难行Either way , without the needed

technology we can do nothing.

15.太多的电子邮件用户以为：人们收到电子邮件，就会马上阅读Too many e-mail users

assume that the minute someone receives an e-mail ，the person will read it .

16.我错误的认为他一完成论文，就会提交给我I wrongly assumed that the minute he fished

his paper ,he would hand it in to me .

17.所有与会者都能在一个小时内读到邮件的几率将会很小The chance that all the

participants will read that message within the hour will be pretty small .

18.他们都会及时收到邀请的机率将会很大The chance that they will receive the invitation

in time will be pretty high

19.你无法知道那个人是否已经逐字逐句的阅读了邮件信息It bas no way to know if the

person has read the message word for word

20.我们无法猜想她年轻时候是什么样子的We have no way to guess what she was like in

her younger years

21.我们所能做的就是使你明确对方已经看了邮件的第一页All it can do is assure you that

the person has looked at the first screen of the message

22.医生都无法治愈他的顽疾，他们所能做的就是为他延长几个月的生命The doctors

could not his disease .all they could do was delay his death for a few months

23.这公园里挤满了打手机的人。The park was filled with people talking on their cell phones

24.这大厅里挤满了观看演出的年轻人。The hall was filled with young people watching the

performance

25.过去常常联系你和不在身边的人。The telephone used to connect you to the absent

26.过去我在他这个年纪的时候时常写诗。The used to write poems when I was his age

27.为什么我们联系的越多，越觉得失去联系了呢？why is it that the more connected we get

the more disconnected I fell

28.为什么房间的温度越来越高了呢？why is it that the temperature in the rooms is rising

higher and higher

29.随着人民之间可以想象的到的联系变得自动化起来，疏远指数就上升了As almost

every conceivable contact between human being gets automated ,the alienation index goes up

30.随着时间的流逝这个想法越来越强烈。This though grew as the days passed

31.既然你可以用信用卡在加油站自动刷卡免除与人打交道的麻烦，又何必对加油站的工

作人员打招呼了？why say good morning to the attendant when you can swipe your credit card at the pump and save yourself the bother of human contact

32.既然你可以吧卡插入自动取款机取钱，那又何必与可能同你住在同一街区的人员沟通

了？why talk to a clerk who might live in the neighborhood when you can just insert your card into the AIM

33.正是他们无意中带来的后果让我不寒而栗。It’s their unintended consequences that make

me cringe .

34.正是昨晚约翰打电话给他妹妹it was last night that john phoned her sister

35.确实很值得把你的世博会参观的行程分出一些来游览，外滩，南京东路超现代的浦东

甚至临近的杭州和苏州It is really worth breaking up your expo visit with trips to the bund , to Nanjing east road ,to ultra-modern Pudong , maybe even to neighboring Hangzhou and Suzhou .

36.在你最终拍板前跟你的财政顾问讨论一下是值得的It is worth talking with your

financial adviser before making your final decision .

37.相信我世博会第一天参观后你就会筋疲力尽Believe me :the expo itself will wear you

out after Day One .

38.相信我，我妻子不喜欢再次提醒我And believe me ,my wife does not enjoy reminding me

twice .

39.由于有200多个场馆而时间又那么有限还有长长的队伍所以你不会想把你在园区的时

间白白浪费掉With over 200 pavilions and such limited time and such long lines ,you don’t want your day at the expo site to go to waste .

40.The Africa pavilion reminded me of a college activities fair , with booths and stands for

individual countries .

41.If you’ve been to France , there’s no point waiting an hour to see the Fisher Price version of

France in the French Pavilion (although still quite beautiful)

42.如果你不打算住在这里，付房租就没有什么意义了There’s no point (in) paying rent on

the apartment if you’re not going to live there.

43.简单的说，参观上海世博会是一生仅有一次的经历Simply stated , the shanghai expo is a

once-in-a-lifetime experience.

44.简单的说，税收下调意味着普通民众将有3%的福利simply put , the tax cuts mean the

average people will be about 3% better off .

《基础会计学》第二章课后习题及参考答案

5．在借贷记账法下，有关账户之间形成的应借应贷的相互关系称为账户对应关系。（）第二章会计记账方法 6．总分类账户与明细分类账户进行平行登记时的所谓同时登记，确切地说应该是同一会计期间作业一： 登记。（）一，单项选择题： 7．平行登记的要求中，所谓登记方向一致，是指会计分录中总分类账户和明细分类账户的记账 1．下列科目中属于流动资产的是（） 符号是一致的。（）A预提费用B短期借款C资本公积D应收账款 8．采用借贷记账法，每发生一笔经济业务必定要在两个账户中同时登记。（） 2．企业全部资产减去全部负债后的净额，就是企业的（） 四，名词解释A所有者权益B实收资本C资本公积D盈余公积 平行登记发生额平衡法余额平衡法 3．预付供货单位货款属于企业的一项（） 五，简答题A资产B负债C收入D费用 1．简述借贷复式记账法的内容和特点。 4．经济业务发生后，会计等式的平衡关系（） 2．简述总账和明细账平行登记的要点及两者数量关系核对的公式。 A可能会受影响B不一定受影响C必然不受影响D必然受影响 3．简述借贷记账法的试算平衡。 5．资产与权益的平衡关系是指（）

六，综合题A一项资产金额与一项权益金额的相等关系B几项资产金额与一项权益金额的相等关系 1．计算题C流动资产合计金额与流动负债金额的相等关系D资产总额与权益总额的相等关系 某企业有关会计要素的数据如下： 6．引起资产内部一个项目增加，另一个项目减少，而资产总额不变的经济业务是（） 负债5000万元；所有者权益8000万元；A用银行存款偿还短期借款B收到投资者投入的机器一台C收到外单位前期欠的货款 费用200万元；利润6000万元；D收到国家拨入的特种储备物资 要求： 计算资产总额和收入总额 7．企业用借款直接偿还应付购货款，属于（） 2．某公司设有以下账户： 实收资本、本年利润、现金、银行存款、待摊费用、预提费用、原材A资产项目和权益项目同增B权益项目之间此增彼减C资产项目和权益项目同减 料、固定资产、其他应收款、应收账款、应付账款、预收账款、预付账款、其他应付款、材料采D资产项目之间此增彼减 购、累计折旧、管理费用、财务费用、营业费用、主营业务收入、其他业务收入、营业外收入、 8．只有采用权责发生制原则核算的企业，才需要设置（） 主营业务成本、其他业务支出、应交税金、短期借款、资本公积、制造费用、生产成本、库存商A待摊费用B本年利润C银行存款D库存商品

《新编实用英语》第一册教案

《新编实用英语》第一册教案 Unit One Greeting and Introducing People Teaching Objective In "Talking Face to Face",learn how to greet people and how to make introductions. In "Being All Ears", practice listening comprehension to greet and introduce people with various relationships. In "Maintaining a Sharp Eye",master the key words and structures and learn the way foreign people greet each other, particularly the way Americans meet and greet each other, both in informal and formal situations by reading through passage I; learn and practice how to introduce oneself by reading through passage II. In "Trying Your Hand", become knowledgeable on how to write a business card and fill in a passport with one’s personal information; review the basic sentence structure. Teaching Procedures Section I Talking Face to Face1.Warm- up: Expressions of greetings and responses to greetings： a. Greetings: 1) Hi! How do you do? 2) Hello, you must be Jack from America. 3) How are you? 4) Hello. How are things with you? How are you doing? 5) How is everything? 6) You are doing all right? 7) How it goes? 8) How is life, John? 9) Excuse me. Are you Kitty? b. Responses to Greetings: 1) How do you do? 2) Fine, just fine. 3) Fine, thank you. 4) Quite well. And you? 5) The usual. How about you? 6) So-so. And what about you? 7) Nothing particular. 8) Not too bad. 9) Nice to meet you.

微观经济学第二章课后练习答案

第二章需求、供给和均衡价格 1. 已知某一时期内某商品的需求函数为Q d＝50－5P，供给函数为Q s＝－10＋5P。 (1)求均衡价格P e和均衡数量Q e，并作出几何图形。 (2)假定供给函数不变，由于消费者收入水平提高，使需求函数变为Q d＝60－5P。求出相应的均衡价格P e和均衡数量Q e，并作出几何图形。 (3)假定需求函数不变，由于生产技术水平提高，使供给函数变为Q s＝－5＋5P。求出相应的均衡价格P e和均衡数量Q e，并作出几何图形。 (4)利用(1)、(2)和(3)，说明静态分析和比较静态分析的联系和区别。 (5)利用(1)、(2)和(3)，说明需求变动和供给变动对均衡价格和均衡数量的影响。 解答：(1)将需求函数Q d＝50－5P和供给函数Q s＝－10＋5P代入均衡条件Q d＝Q s，有50－5P＝－10＋5P 得P e＝6 将均衡价格P e＝6代入需求函数Q d＝50－5P，得 Q e＝50－5×6＝20 或者，将均衡价格P e＝6代入供给函数Q s＝－10＋5P，得 Q e＝－10＋5×6＝20 所以，均衡价格和均衡数量分别为P e＝6，Q e＝20。如图2—1所示。 图2—1 (2)将由于消费者收入水平提高而产生的需求函数Q d＝60－5P和原供给函数Q s＝－10＋5P代入均衡条件Q d＝Q s，有 60－5P＝－10＋5P 得P e＝7 将均衡价格P e＝7代入Q d＝60－5P，得 Q e＝60－5×7＝25

或者，将均衡价格P e＝7代入Q s＝－10＋5P，得 Q e＝－10＋5×7＝25 所以，均衡价格和均衡数量分别为P e＝7，Q e＝25。如图2—2所示。 图2—2 (3)将原需求函数Q d＝50－5P和由于技术水平提高而产生的供给函数Q s＝－5＋5P代入均衡条件Q d＝Q s，有 50－5P＝－5＋5P 得P e＝5.5 将均衡价格P e＝5.5代入Q d＝50－5P，得 Q e＝50－5×5.5＝22.5 或者，将均衡价格P e＝5.5代入Q s＝－5＋5P，得 Q e＝－5＋5×5.5＝22.5 所以，均衡价格和均衡数量分别为P e＝5.5，Q e＝22.5。如图2—3所示。

新编实用英语综合教程1 第一版 课后答案

一.填空 1. The 2008 … time for… China. 2. Of coursel …take care of …business. 3. Never leave without … years. 4. Clearly … recognition and awards …work. 5. The great … team work. 6. Exercise will … appetite. 7. When I come across … notebook. 8. Let me … official … land. 9. In that … occasional … serious. 10. You have … at hand … traveling. 11. She is annoyed … recommended. 12. Please … feel free to … home. 13. `Nowadays … assume that … is celebrated … America. 14. Is Spring Festival a … the majority … countries? 15. My family … end-of-year cleaning. 16. Some universities … Muslim(s) … food. 17. Decorating the … colorful candles … now. 18.In the 1950s … large choice … them. 19.Do you … ways of thinking? 20.The Asian … festive event … People shared … athletes. 二，汉译英。 1.像…自己。 You, like most people, probably are learning how to market yourself. 2.对不起…走！ I’m so sorry , My go-go boss asks me to leave right now. 3.我…言表。 Language is not enough to show my thanks to my parents 4.这…适用于我。 Such sweet words might please you.but they don’t work for me 5.做…差异。 We should beware of cultural differences in foreign trade 6.我们…老朋友。 We have just come across an old friend we haven’t seen for ages. 7.你…吗？ Can you provide any evidence to show that he was not in the crime scene at that time. 8.如果…联系。 If you need our products, please contact me in advance, 9.汤姆…去过。 Tom is new to the town . He has never been there before. 10.认为…错了。 It would be wrong to assume that Valentine’s Day is only celebrated by young people. 11.随着…世界杯了。 With the development of the Internet,the World Cup could be watched at the same time

高数课后习题及答案 第二章 2.3

2．2）1 ()3,0 x f x x ==； 解： 11 lim 11 lim lim ()lim 3330 lim ()lim 333 x x x x x x x x x x f x f x - →--+ →++-∞ →→+∞ →→========+∞ 因为0 lim ()lim ()x x f x f x - + →→≠，所以3 lim ()x f x →-不存在。 3）2 11(),02x f x x - ?? == ? ?? ； 解： 2 10000 11lim ()lim ()lim ()lim 22x x x x x f x f x f x -+- -∞ →→→→?? ??=====+∞ ? ??? ?? 所以3 lim ()x f x →-不存在。 4）3,3 9)(2 -=+-= x x x x f ； 解：63 ) 3)(3(lim )(lim )(lim 3 3 3 -=+-+==+ + - -→-→-→x x x x f x f x x x 故极限6)(lim 3 -=-→x f x 2 2 2 2 2 5).lim ()224,lim ()3215, lim ()lim (),lim ()x x x x x f x f x f x f x f x -+-+→→→→→=?==?-=≠解：因为所以不存在。 ()0 6.lim ()lim 21,lim ()lim cos 12,lim ()lim (),lim ()x x x x x x x x f x f x x f x f x f x --++-+→→→→→→→===+=≠）解：因为所以不存在。 7）1()arctan ,0f x x x ==；

新编实用英语综合教程1第八单元课后答案

Unit 8 Keeping Healthy and Seeing a Doctor Put in Use ①Imagine you are a doctor. An overseas student from Englandis suffering from a toothache. He is coming to you for help make a conversation with him by filling out the blanks. Key: (1). the matter (2). very well (3). have a look (4). worry (5). some medicine (6). stop the pain (7). Take the tablets (8) several times a day ②Role-play the following conversation with your partner by putting the Chinese version into English. Key: (1). What’s w rong? You look very pale. (2). Oh, your leg is bleeding. You’d better lie down. Does that feel better? (3). I have the first-aid kit here. Let’s stop the bleeding first. (4). You should go to see a doctor immediately. Want me to accompany you to the hospital? ③Tourists may suffer from different kinds of illness. Imagine you are a tour guide. You notice that one of the tourists doesn’t look very well. Talk with her and try to give her some help.

新编实用英语综合教程1第八单元课后答案

新编实用英语综合教程1第八单元课后答案 Unit 8 Keeping Healthy and Seeing a Doctor Put in Use ①Imagine you are a doctor. An overseas student from Englandis suffering from a toothache. He is coming to you for help make a conversation with him by filling out the blanks. Key: (1). the matter (2). very well (3). have a look (4). worry (5). some medicine (6). stop the pain (7). Take the tablets (8) several times a day ②Role-play the following conversation with your partner by putting the Chinese version into English. Key: (1). What’s wrong? You look very pale. (2). Oh, your leg is bleeding. You’d better lie down. Does that feel better? (3). I have the first-aid kit here. Let’s stop the bleeding first. (4). You should go to see a doctor immediately. Want me to accompany you to the hospital? ③Tourists may suffer from differen t kinds of illness. Imagine you are a tour guide. You notice that one of the tourists doesn’t look very well. Talk with her and try to give her some help. Key: (1). Very soon. Are you sure you’re all right? You don’t look quite yourself. (2). Oh, t hat’s too bad. You’d better take a rest now. have you had any medicine? (3). Look, this is medicated oil. You might want to rub some on your temples. (4). But you’d better go to see a doctor. I’ll accompany you to the clinic as soon as we return to the hotel. Step III. Being All Ears Listen and decode.

第二章课后练习答案

第二章贸易术语 思考题答案 1. 试述贸易术语的含义、性质及在国际贸易中的作用。 贸易术语（trade terms），也称贸易条件、价格术语（price terms），是在国际贸易的长期实践中逐渐形成的用一个简短的概念或外文缩写来表明商品的价格构成、说明货物交接过程中有关的风险、责任和费用划分问题的专门术语。 贸易术语具有两重性，即一方面表示交货条件，另一方面表示成交价格的构成因素。 贸易术语在国际贸易中起着积极的作用，主要表现在下列几个方面： （1）有利于买卖双方洽商交易和订立合同； （2）有利于买卖双方核算价格和成本； （3）有利于解决买卖双方的争议。 2. 有关国际贸易术语的国际贸易惯例主要有哪几种？分别解释了哪些贸易术语？ 目前，国际上有关贸易术语的国际惯例有三种。 （1）《1932年华沙-牛津规则》 它对CIF合同的性质、特点及买卖双方的权利和义务都作了具体的规定和说明，为那些按CIF贸易术语成交的买卖双方提供了一套易于使用的统一规则。 （2）《1941年美国对外贸易定义修正本》 该定义对以下六种贸易术语作了解释：Ex（Point of Origin）、FOB（Free on Board）、FAS （Free Along Side）、C&F（Cost and Freight）、CIF（Cost，Insurance and freight）和Ex Dock （named port of importation）。 （3）《2000年国际贸易术语解释通则》 它解释了四组13个贸易术语。第一组为“E”组（EX WORKS），第二组为“F”组（FCA、FOB和FAS），第三组为“C”组（CFR、CIF、CPT和CIP），第四组为“D”组（DAF、DES、DEQ、DDU和DDP）。 3. 什么是《INCOTERMS 2000》？试分别指出各组术语的共同点以及13个术语的交货点。 《INCOTERMS 2000》（《2000年国际贸易术语解释通则》）是国际商会为统一对各种贸易术语的解释而制定的一种通用的有关贸易术语的国际贸易惯例。最早的版本制定于1936年，后来经过了多次修改和补充：1953、1967、1976、1980、1990年先后进行过5次修订和补充，最近的一次修订是在2000年，故称为《INCOTERMS 2000》。 它解释了四组13个贸易术语。 E组只有一个贸易术语，即EXW（工厂交货），其特点是卖方在自己的地点把货物备妥或交至买方处置之下。 F组有3个贸易术语（FCA、FAS、FOB），其共同点是卖方须将货物交至买方指定的承运人，不负责运输及保险等事宜。 C组有4个贸易术语（CFR、CIF、CPT、CIP），其共同点是卖方须签订运输合同，支付运费，但货物灭失或损坏的风险及装船和启运后发生意外所产生的费用，卖方不承担责任。 D组有5个贸易术语（DAF、DES、DEQ、DDU、DDP），其特点是卖方须承担把货物交至指定的进口国交货地点的全部费用和风险，且按D组术语成交的贸易合同，称为到货

新编实用英语综合教程3 unit(1-6) 课后答案

Unit 1 Put in Use : Practice 1 1、are going to apply for a patent on it 2、ve you made the necessary preparations 3、e model has yet to undergo / receive the final test, but the technical drawings are ready 4、w long will it take to get the patent Put in Use : Practice 2 1、at findings have you got from the market research 2、e mini-type of mobile phones are selling well in the market 3、you think this new type of mobile phones will take the place of the older ones 4、people's living conditions have been improved greatly in recent years 5、their views on consumption are also changing rapidly 6、So you believe the potential market for mobile phones will be quite large Put in Use : Practice 3 1、are you interested in 2、 something about them 3、 model do you prefer

(完整版)微观经济学第二章课后习题答案

第二章需求、供给和均衡价格 1.解: （1）将需求函数Q d= 50-5P和供给函数Q s=-10+5P代入均衡条件Q d=Q s ,有:50- 5P= -10+5P 得: Pe=6 以均衡价格Pe =6代入需求函数Q d=50-5p ,得: Qe=50-5×6 或者,以均衡价格 Pe =6 代入供给函数Q s =-10+5P ,得:Qe=-10+5×6 所以,均衡价格和均衡数量分别为Pe =6 , Qe=20 图略. （2）将由于消费者收入提高而产生的需求函数Q d=60-5p和原供给函数Q s=-10+5P, 代入均 衡条件Q d=Q s有: 60-5P=-10+5P 解得Pe =7 以均衡价格Pe =7代入Q d=60-5p ,得 Qe=25 或者,以均衡价格Pe =7代入Qs =-10+5P, 得Qe=25 所以,均衡价格和均衡数量分别为Pe =7，Qe=25 （3）将原需求函数Q d=50-5p 和由于技术水平提高而产生的供给函数Q s=-5+5p ,代入均衡条件Q d=Q s,有: 50-5P=-5+5P得 P e=5.5 以均衡价格Pe=5.5代入Q d=50-5p, 得Qe=50-5×5.5=22.5 所以,均衡价格和均衡数量分别为Pe=5.5，Qe=22.5图略。 （4）（5）略 2.解： (1)根据中点公式计算，e d=1.5 (2)由于当P=2时，Q d=500-100*2=300,

所以，有： 22 .(100)3003 d dQ P dP Q e =- =--*= （3）作图，在a 点P=2时的需求的价格点弹性为：e d =GB/OG=2/3或者e d =FO/AF=2/3 显然，利用几何方法求出P=2时的需求的价格弹性系数和（2）中根据定义公式求出结果是相同的，都是e d =2/3 3解: (1) 根据中点公式 求得：4 3 s e = (2) 由于当P=3时，Qs=-2+2×3=4，所以 3 .2 1.54 s dQ P dP Q e = =?= (3) 作图，在a 点即P=3时的供给的价格点弹性为：e s =AB/OB=1.5 显然，在此利用几何方法求出的P=3时的供给的价格点弹性系数和（2）中根据定义公式求出的结果是相同的，都是e s =1.5 4.解： (1)根据需求的价格点弹性的几何方法,可以很方便地推知:分别处于不同的线性需求曲线上的a 、b 、e 三点的需求的价格点弹性是相等的,其理由在于,在这三点上都有: e d =FO/AF （2）根据求需求的价格点弹性的几何方法,同样可以很方便地推知:分别处于三条线性需求曲线上的a 、e 、f 三点的需求的价格点弹性是不相等的,且有e da

新编实用英语综合教程1第二版答案

第一单元 Put in use 1. Robert Thank you pleasure Here is this is How do you do call me journey the hotel very kind 2. Hi, are you Miss Mary Green? I’m Li hong from Foreign Languages School. How do you do, Miss Green? Nice to meet you. Did you have a good journey? Oh, yes. Let’s go to the hotel of our school. Everything is ready for you there. Well, Miss Green, here is my card. Please call me or email me if you need any help. 3. Excuse me How do you do, Mr. Smith Welcome to our company you are the general manager Here is my card Thank you My email address is Read and Think 1. It means a close and friendly relationship. 2. They find these terms too formal. 3. They want to show their friendliness. 4. They want to know more about you so that they can begin a conversation with you. 2 greet informal friendly formal wave perhaps leave 3 use Mr., Mrs. or Miss use first names call me Sally glad/happy informal/friendly 4. named has left prefer personal accept means Speaking of get to know acquainted with 5. It is my impression that a typical English gentleman often takes an umbrella with him. To the students, the introduction to the cultural background is the best part of the book. When we talk with a foreign lady, in most cases we should not ask such personal questions as her age. Many young people prefer pop songs to old songs. They think pop singers are very cool. This beautiful and clean city has left a deep impression upon the foreign tourists. Professor Lu Yang stood on the plane’s entrance and waved good-bye to us.

第二章课后习题与答案

第2章人工智能与知识工程初步 1. 设有如下语句，请用相应的谓词公式分别把他们表示出来：s (1)有的人喜欢梅花，有的人喜欢菊花，有的人既喜欢梅花又喜欢菊花。 解：定义谓词d P(x)：x是人 L(x,y)：x喜欢y 其中，y的个体域是{梅花，菊花}。 将知识用谓词表示为： (?x )(P(x)→L(x, 梅花)∨L(x, 菊花)∨L(x, 梅花)∧L(x, 菊花)) (2) 有人每天下午都去打篮球。 解：定义谓词 P(x)：x是人 B(x)：x打篮球 A(y)：y是下午 将知识用谓词表示为：a (?x )(?y) (A(y)→B(x)∧P(x)) (3)新型计算机速度又快，存储容量又大。 解：定义谓词 NC(x)：x是新型计算机 F(x)：x速度快 B(x)：x容量大 将知识用谓词表示为： (?x) (NC(x)→F(x)∧B(x)) (4) 不是每个计算机系的学生都喜欢在计算机上编程序。 解：定义谓词 S(x)：x是计算机系学生 L(x, pragramming)：x喜欢编程序 U(x,computer)：x使用计算机 将知识用谓词表示为： ? (?x) (S(x)→L(x, pragramming)∧U(x,computer)) (5)凡是喜欢编程序的人都喜欢计算机。 解：定义谓词 P(x)：x是人 L(x, y)：x喜欢y 将知识用谓词表示为：

(?x) (P(x)∧L(x,pragramming)→L(x, computer)) 2 请对下列命题分别写出它们的语义网络： (1) 每个学生都有一台计算机。 解： (2) 高老师从3月到7月给计算机系学生讲《计算机网络》课。 解： (3) 学习班的学员有男、有女、有研究生、有本科生。 解：参例2.14 (4) 创新公司在科海大街56号，刘洋是该公司的经理，他32岁、硕士学位。 解：参例2.10 (5) 红队与蓝队进行足球比赛，最后以3：2的比分结束。 解：

新编实用英语第二版综合教程二 课后答案

第一单元 1为方便起见，这些照片将按照时间顺序展示 For convenience, the photos will be shown in time sequence.、 2出现事故之后你需要把车停下 You are required to stop your car after an accident 3教育孩子的观念和做法因文化的差异而有所不同 The conceptions and practices of child education vary from culture to culture. 4与其说他是位音乐家，倒不如说他是位诗人 He is more of a poet than a musician 5我父亲已好心地提出让我们去飞机场 My father has kindly offered to take us to the airport 6我们确实应该找个时间很快见面，讨论一下细节 We really should meet sometime soon to discuss the details. 1You are not required to commit yourself until you know what the invitation is for. Once he starts a job he won't stop until it's finished. 他直到30岁才找到女朋友。. He didn't have a girlfriend until he was thirty. 我不告诉你，你不要离开。 Don't leave until I tell you to. 2The invitation turns out to be something you'd hate to do. It turns out that he is the person you'd have to deal with. 真实情况原来比我们想象得更为离奇。 The truth turned out to be stranger than we had expected. 原来他们都是孩子的时候，她就认识他了。 . It turns out that she had known him when they were children. 3You will be in a position to take back your acceptance or invent an excuse later. I'm not in a position to reveal any of the details of the project at present. 很抱歉，我现在不能帮你的忙。 .I'm sorry I'm not in a position to help you right now 我敢肯定他们想定经济上帮助她，但却无能为力。 .I'm sure they'd like to help her out financially but they're not in a position to do so. 4In many instances it is the inviter who pays, but in some instances each one pays his or her own check. In many instances it is the CEO who has the final say, but in some instances the department manager has the right to make the decision. 很多情况下是老师在讲，但在某些情况下则是学生讲。 .In many instances it is the teacher who talks, but in some instances the students talk. 很多情况下由丈夫付账，但在某些情况下则妻子自己付账。 In many instances it is the husband who pays, but in some instances the wife pays her own bill. 5It may be more of a suggestion than an invitation. He is more of a teacher than a student. 与其说他是位制片人，倒不如说他是位导演。 . He is more of a director than a producer.

定性数据分析第二章课后答案资料

定性数据分析第二章 课后答案

第二章课后作业 【第1题】 解：由题可知消费者对糖果颜色的偏好情况（即糖果颜色的概率分布），调查 者取500块糖果作为研究对象，则以消费者对糖果颜色的偏好作为依据，500块糖果的颜色分布如下表1.1所示： 表1.1 理论上糖果的各颜色数 由题知r=6，n=500，我们假设这些数据与消费者对糖果颜色的偏好分布是相符，所以我们进行以下假设: 原假设：:0H 类i A 所占的比例为)6,...,1(0==i p p i i 其中i A 为对应的糖果颜色，)6,...,1(0=i p i 已知，16 10=∑=i i p 则2χ检验的计算过程如下表所示： 在这里6=r 。检验的p 值等于自由度为5的2χ变量大于等于18.0567的概率。在Excel 中输入“)5,0567.18(chidist =”，得出对应的p 值为

05.00028762.0<<=p ，故拒绝原假设，即这些数据与消费者对糖果颜色的偏好 分布不相符。 【第2题】 解：由题可知 ，r=3，n=200，假设顾客对这三种肉食的喜好程度相同，即顾 客选择这三种肉食的概率是相同的。所以我们可以进行以下假设： 原假设 )3,2,1(3 1 :0==i p H i 则2χ检验的计算过程如下表所示： 在这里3=r 。检验的p 值等于自由度为2的2χ变量大于等于15.72921的概率。在Excel 中输入“)2,72921.15(chidist =”，得出对应的p 值为 05.00003841.0<<=p ，故拒绝原假设，即认为顾客对这三种肉食的喜好程度是 不相同的。 【第3题】 解：由题可知 ，r=10，n=800，假设学生对这些课程的选择没有倾向性，即选 各门课的人数的比例相同,则十门课程每门课程被选择的概率都相等。所以我们可以进行以下假设： 原假设)10,...,2,1(1.0:0==i p H i 则2χ检验的计算过程如下表所示：

新编实用英语综合教程unit课后练习答案

新编实用英语综合教程2 Unit 3 课后习题答案 P39-1 1 speak 2. where is he 3. might be with 4. leave a message 5. call me 6. 667-3452 7. welcome P39- 2 1. Hello , May I speak to Mr. Smith please 2. Yes , please , tell hime to call the director's office , the number is 864-3509 3. It would be best if he cold call this afternoon , at about 2 o'clock 4. thanks a lot P39-3 1. Hello 2. I amsorry , but he is not in at the moment , would you like to leave a message 3. I 'll tell her as soon as he is back 4. You're welcome . P40-3 1. a telephone message 2. a memo 3. phone

4. at home 5. personal 6. skills 7. a message 8. expect 9. who called 10. what was the message 11. friends and family 12. questions 13. when they called 14. the person calling 15. reach him P41-4 1- b 2- d P43-1 1. Because people stopped talking face to face to one another 2. Because his friends was busy talking on the phone , completely forgetting his present 3. Because they can be used anywhere and anytime 4. Without seeing or talking to one another and with voice mail , we can conduct entire poeple lose their inimacy of interaction . 5. People lose their intimacy of interaction 6. He thinks it's great , but worries about its unintended consequences . P43-2 1. disconnected 2. set back