book 2 unit7 课后答案
Unit 7 Learning about English
Text A The Glorious Messiness of English
I. V ocabulary
1. Fill in the gaps with words or phrases…
1) Strictly speaking 2) drifted 3) resembles 4) invaded
5) is conquered 6) fascinating 7) snack 8) put into practice
9) source 10) climate 11) surrendered 12) were aroused
2. Rewrite each sentence…
1) an absolute necessity rather than a luxury
2) is a valuable addition to the football team.
3) will get out of control, if the firemen do not arrive within ten minutest
4) alternative but to go via Vancouver to get to Seattle.
5) declared all beef imports will be banned for the next six months as an emergence measure to stop the spread of mad cow disease
3. Complete the sentences
1) systematic, have invented, to a very real extent, mysteries
2) to establish, to be modified/ modifying
3) tolerance towards, strike out, enrich
II. Synonyms
1. wish, wish, want, want/wish
2. skin, hide/skin, hide, skin
3. raise/rear, raise, rear/raise, raise
4. royal, kingly/royal, sovereign, royal/ kingly
III. Usage
1. Indeed
2. though
3. Frankly
4. Moreover
5. To my knowledge
6. however
7. nevertheless
8. Yet
9. instead 10. in other words
Comprehensive Exercises
I. Cloze
1. Text-related
1) fascinating 2) tolerance 3) invented 4) addition 5) ban
6) corrupt 7) out of control 8) influenced 9) elite 10) came up with
11) establishing 12) Massive 13) sources 14) enrich
2. Theme-related
1) early 2) similar 3) source 4) observation 5) examine
6) features 7) declared 8) stronger 9) accident 10) sprung
II. Translation
1. Translate the Sentences
1) Many small businesses have sprung up in the city since the new policy went into effect.
2) On hearing the news, she smiled briefly, and then returned to her habitual frown.
3) He paused for effect, then said:” We can reach/ enter these markets through new channels.
4) The addition of a concert hall to the school will help it nourish young musical talents
5) We have no way to protect our personal liberties until we have established a sovereign state./ We can’t protect our personal liberties unless we, first of all, establish a sovereign state.
2. Translate the passage
Though how the English language came into existence remains a mystery to many people, linguists believe that English and most other European languages have descended from a common source: the Indo-European parent language. English was first spoken by the Anglo-Saxons who invaded England in the fifth century. They passed onto us the basic vocabulary of English. In over fifteen centuries of its development, English has enriched itself by massive borrowing. As British immigrants landed in America and established the United States as an independent nation, a new variety was added to the English language: American English. Though some people worry that the language is running out of control, many native speakers of English take pride in the tolerance of their language.
组成课后答案
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(外教社)全新版大学英语综合教程第二册第三单元课后练习答案unit-3-book-2
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组成课后答案要点
《一》２．冯·诺依曼计算机的特点是什么？其中最主要的一点是什么？ 解：冯·诺依曼计算机的特点如下： ①计算机（指硬件）应由运算器、存储器、控制器、输入设备和输出设备五大基本部件组成； ②计算机内部采用二进制来表示指令和数据； ③将编好的程序和原始数据事先存入存储器中，然后再启动计算机工作。 第③点是最主要的一点。 ３．计算机的硬件是由哪些部件组成的？它们各有哪些功能？ 解：计算机的硬件应由运算器、存储器、控制器、输入设备和输出设备五大基本部件组成。它们各自的功能是： ①输入设备：把人们编好的程序和原始数据送到计算机中去，并且将它们转换成计算机内部所能识别和接受的信息方式。 ②输出设备：将计算机的处理结果以人或其他设备所能接受的形式送出计算机。 ③存储器：用来存放程序和数据。 ④运算器：对信息进行处理和运算。 ⑤控制器：按照人们预先确定的操作步骤，控制整个计算机的各部件有条不紊地自动工作。６．计算机系统的主要技术指标有哪些？ 解：计算机系统的主要技术指标有：机器字长、数据通路宽度、主存容量和运算速度等。机器字长是指参与运算的数的基本位数，它是由加法器、寄存器的位数决定的。 数据通路宽度是指数据总线一次所能并行传送信息的位数。 主存容量是指主存储器所能存储的全部信息量。 运算速度与机器的主频、执行什么样的操作、主存本身的速度等许多因素有关。 《二》１７．将下列十进制数转换为IEEE 短浮点数：
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高等数学第六版(同济大学)上册课后习题答案解析
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英语综合教程BOOK3课后答案 Unite 3 Lead-in 4,3,6,2,1,3 Passage A ABCAB 6. 1.attain, 2.modest, 3.attractive, 4.precise, 5.campaign, 6.market, 7.manufactures, 8.sponsor, 9.imported, 10. brands 7. 1.frown (very much) …on, 2.for instance, 3.as a result, 4.when it comes to, 5.under ... umbrella 8.1) Thoughts are expressed by means of language. 2) I have bought so many new books this year that it's really difficult for me to keep count of them. 3)The old lady feels assured that her son will come back home today to celebrate her birthday. 4) His mother insisted that his pocket money should not exceed 100 yuan per month. 5) We bought a car last month, which was registered under my name. 9. 1. For most American teenagers, when it comes to comfortable and fashionable clothing, nothing beats T-shirts and jeans. 2. Starting in 2004, Addidas widely promoted that “Impossible is nothing,” and the notion took hold. 3. When the news was first released online, the number of its viewers beat the imagination. 4. The girl’s big break came with her outstanding performance at the singing contest. 5. In many European countries people tend to frown on smoking in public places. Passage B CDCAB 13. 1.revenues, 2.targeting, 3.appliances, 4.via, 5.smashing, 6.loyal, 7. comparable, 8.alongside, 9.claiming, 10. filmed 14. 1. beat ... expectation, 2. So far, 3. built up, 4. at home, 5. on ... basis 15 (1)A great man can dominate a difficult situation by force of character. (2)According to the latest report,tourists do not have to apply for an entry visa to some Southeast Asian countries. (3)The color of the envelope suggests that the letter might be from a woman. (4)Trains can’t rival planes for speed,but many people prefer to travel by train. (5)People are much more likely to accept this mode of administration once they seen that it really works. Unite 4 Lead-in 1. got me wondering; 2. it hit me; 3. original me; 4. bank statement; 5. overdue
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高等数学课后习题及解答 1. 设u=a-b+2c，v=-a+3b-c.试用a，b，c 表示2u-3v. 解2u-3v=2（a-b+2c）-3（-a+3b-c） =5a-11b+7c. 2. 如果平面上一个四边形的对角线互相平分，试用向量证明它是平 行四边形. 证如图8-1 ，设四边形ABCD中AC 与BD 交于M ，已知AM = MC ，DM 故 MB . AB AM MB MC DM DC . 即AB // DC 且|AB |=| DC | ，因此四边形ABCD是平行四边形. 3. 把△ABC的BC边五等分，设分点依次为D1，D2，D3，D4，再把各 分点与点 A 连接.试以AB=c, BC=a 表向量 证如图8-2 ，根据题意知 1 D 1 A, 1 D 2 A, D 3 A, D A. 4 1 D3 D4 BD1 1 a, 5 a, D1D2 a, 5 5 1 D 2 D 3 a, 5 故D1 A=- （AB BD1）=- a- c 5
D 2 A =- （ AB D A =- （ AB BD 2 BD ）=- ）=- 2 a- c 5 3 a- c 3 =- （ AB 3 BD 4 ）=- 5 4a- c. 5 4. 已知两点 M 1（0，1，2）和 M 2（1，-1，0） .试用坐标表示式表示 向量 M 1M 2 及-2 M 1M 2 . 解 M 1M 2 =（1-0， -1-1， 0-2）=（ 1， -2， -2） . -2 M 1M 2 =-2（ 1，-2，-2） =（-2， 4，4）. 5. 求平行于向量 a =（6， 7， -6）的单位向量 . a 解 向量 a 的单位向量 为 ，故平行向量 a 的单位向量为 a a 1 = （ 6，7， -6）= 6 , 7 , 6 ， a 11 11 11 11 其 中 a 6 2 72 ( 6)2 11. 6. 在空间直角坐标系中，指出下列各点在哪个卦限？ A （1，-2，3）， B （ 2， 3，-4）， C （2，-3，-4）， D （-2， -3， 1）. 解 A 点在第四卦限， B 点在第五卦限， C 点在第八卦限， D 点在第三卦限 . 7. 在坐标面上和在坐标轴上的点的坐标各有什么特征？指出下列各点的位置： A （ 3， 4， 0）， B （ 0， 4，3）， C （ 3，0，0）， D （ 0， D A 4
新视野大学英语第三版读写4 Unit7 课后3-6-7习题答案
there was once a time when they were on the fringe of American political life. 虽然保守派今天在主流政治中占据主导地位，但曾经一度处于美国政治生活的边缘。 2.The World Health Organization (WHO) was established in 1948, and one of its first responsibilities then was to unify the separate international health-related treaties in a single code. 世界卫生组织（世卫组织）成立于1948年，当时它的首要职责之一是将单独的与卫生有关的国际条约统一为一个法典。 3.Because of over-hunting, the number of certain types of whales has been reduced so greatly that they are in danger of becoming extinct . 由于过度捕猎，某些种类的鲸鱼数量已经大大减少，它们有灭绝的危险。 4.The senator, who was against the war, claimed that with all the indefinite and complex economic and political factors, the outcome of the war was still uncertain. 这位反对这场战争的参议员声称，由于各种不确定和复杂的经济和政治因素，战争的结果仍然不确定。 5.Online shopping and other electronic services could well slash the number of entry-level jobs in the traditional retail sector. 在线购物和其他电子服务很可能会大幅削减传统零售业的入门级工作岗位。 6.The theater is equipped with a(n)intricate system of stage machinery to meet the demands of even the most complex show. 剧院配备了复杂的舞台机械系统，以满足即使是最复杂的演出要求。 7.On March 28, Yang, a famous singer in China, was there with thousands
计算机组成与系统结构课后答案全(清华大学出版社 袁春风主编)
第 1 章习题答案 5．若有两个基准测试程序P1和P2在机器M1和M2上运行，假定M1和M2的价格分别是5000元和8000 请回答下列问题： （1）对于P1，哪台机器的速度快？快多少？对于P2呢？ （2）在M1上执行P1和P2的速度分别是多少MIPS？在M2上的执行速度又各是多少？从执行速度来看，对于P2，哪台机器的速度快？快多少？ （3）假定M1和M2的时钟频率各是800MHz和1.2GHz，则在M1和M2上执行P1时的平均时钟周期数CPI各是多少？ （4）如果某个用户需要大量使用程序P1，并且该用户主要关心系统的响应时间而不是吞吐率，那么，该用户需要大批购进机器时，应该选择M1还是M2？为什么？（提示：从性价比上考虑）（5）如果另一个用户也需要购进大批机器，但该用户使用P1和P2一样多，主要关心的也是响应时间，那么，应该选择M1还是M2？为什么？ 参考答案： （1）对于P1，M2比M1快一倍；对于P2，M1比M2快一倍。 （2）对于M1，P1的速度为：200M/10=20MIPS；P2为300k/0.003=100MIPS。 对于M2，P1的速度为：150M/5=30MIPS；P2为420k/0.006=70MIPS。 从执行速度来看，对于P2，因为100/70=1.43倍，所以M1比M2快0.43倍。 （3）在M1上执行P1时的平均时钟周期数CPI为：10×800M/(200×106)=40。 在M2上执行P1时的平均时钟周期数CPI为：5×1.2G/(150×106)=40。 （4）考虑运行P1时M1和M2的性价比，因为该用户主要关心系统的响应时间，所以性价比中的性能应考虑执行时间，其性能为执行时间的倒数。故性价比R为： R=1/(执行时间×价格) R越大说明性价比越高，也即，“执行时间×价格”的值越小，则性价比越高。 因为10×5000 > 5×8000，所以，M2的性价比高。应选择M2。 （5）P1和P2需要同等考虑，性能有多种方式：执行时间总和、算术平均、几何平均。 若用算术平均方式，则：因为(10+0.003)/2×5000 > (5+0.006)/2×8000，所以M2的性价比高，应选择M2。 若用几何平均方式，则：因为sqrt(10×0.003) ×5000 < sqrt(5×0.006) ×8000，所以M1的性价比高，应选择M1。 6．若机器M1和M2具有相同的指令集，其时钟频率分别为1GHz和1.5GHz。在指令集中有五种不同类 请回答下列问题：
视听阅读Book3-课本练习答案
BOOK3-UNIT1 WARMING UP I 1.barbed 2.abdomen 3.burrow 4.fang 5.silk 6.span II C D G A B F E PART 1 I D C A II 1.leading 2.inaccessible 3.explaining 4.are often biased PART 2 I T F T T F II 1.locations, dare to step https://www.360docs.net/doc/b9383469.html,pelling 3.break through, tripping over 4.cut and scrape 5.impressive, pain and irritation PART 3 I West finally finds… The Goliath tarantula detects…For most people… II 1.difficult→ wonderful 2.hand→ back 3.front→ rear 4.alarmed→unsuspecting 5.careless→unfortunate
I H G E F D I B A C READING C A C D A C B 8. feels frightened/ any fear 9. perfectly/ extremely calm 10. confirmed human death BOOK3—UNIT 2 WARMING UP I 1.vulnerable 2.Eucalyptus 3.species 4.mammal II C E F D A B PART 1 I 1.symbol 2.nice, furry, cuddly 3.like toys 4.recognized internationally, beloved II 1.how lovely the koalas are and why they are at risk 2.Tabart is the executive director for the Australian Koala Foundation and an expert on Koalas 3.The koala’s future is very bleak 4.It is cleared for housing, farms and roads PART 2 I 1.adeptly→ adequately 2.reminding→ remaining 3.conceptions→concessions 4.convict→convince 5.sport→spot II 1. B 2. D 3. A 4. C
Unit 7课后练习题
Unit 7课后练习题 I. 完形填空。（20分） Life is not easy,so I’d like to say “When anything happens ,believe in yourself.” When I was a young boy , I was 1 shy to talk to anyone.My classmates often 2 me. I was sad but could do nothing,Later, 3 happened,and it changed my life.It was an English speech contest.My mother asked me to 4 it .What a terrible idea!It meant I had to speak before all the teachers and students of my school. “Come on,boy.Believe in yourself.You are sure to 5 the contest.”The n mother and I talked about many different topics.At last I chose the topic “Believe in yourself.”I tried my best to remember all the speech and practiced it over 100 6 .With my mother’s great love,I did7 in the contest.I could hardly believe my ears when the news came that I had won the first place,I heard the cheers 8 the teachers and the students.Those classmates 9 once looked down on（看不起）me ,now all said “Congratulations!”to me.My mother hugged me and cried excitedly. Since then,everything has changed for me.When I do anything,I try to tell 10 to be sure and I will find myself.This is not only for a person but also for a country. ( ) 1.A.too B.so C.quite D.very ( ) 2.A.made faces at B.looked after C.caught up with https://www.360docs.net/doc/b9383469.html,ughed at ( ) 3.A.nothing B.something C.everything D.anything ( ) 4.A.take part in B.join C.get D.make ( ) 5.A.lose B.win C.pass D.beat ( ) 6.A.words B.topics C.times D.sentences ( ) 7.A.well B.good C.bad D.interested ( ) 8.A.for B.at C.from D.to ( ) 9.A.when B.what C.which D.who ( ) 10.A.someone B.me C.everything D.myself II. 阅读理解。（10分） Many parents like setting family rules for their kids. When kids break rules, parents will give them some punishment(惩罚)，which aren’t included in rules. In fact, when you tell your kids about a new rule, you should talk with them about the price for breaking the rule. Punishments you set should be reasonable, without violence or threat(暴力或威胁). For example, if you find your son smoking, you may limit(限制)his social activities for two weeks. You should punish your kids only in ways you have discussed before the rule is broken. A study shows that the most popular punishment is to limit kids’ TV time. It’s understandable that you’ll be angry when rules are broken. Punishment is a way to express your anger, but it’s not a very good one. Sharing your feelings of anger, disappointment(失望)or sadness with your kids can have a better effect（效果）on them. Try to do that. When your kids know what they have done had made you sad, they will feel guilty. When they know their actions influence you greatly, they will obey rules better.