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英国文学Exercise 3

英国文学Exercise 3

Exercise 3I.Fill in the following blanks.1.I n 1642, the civil war broke out in England. The royalists were defeated by the parliament army led by _____. In 1649, _____ was beheaded and England was declared to be a commonwealth.2.T he Revolution Period is also called _____, because the English Revolution was carried out under a religious cloak.3.T he _____Revolution in 1688 was so called because it was bloodless and there was no revival of the revolutionary demands.4.I n Revolution Period _John Milton____ towers over his age as William Shakespeare towers over the Elizabethan Age and as Chaucer towers over the Medieval period.5.I n Milton’s works, “_Paradise Lost_____”is the greatest, indeed the only generally acknowledged epic in English literature since “Beowulf”.6.T he finest thing in “Paradise Lost” is thedescription of hell, and _Satan ____ is the real hero of the poem.7.J ohn Bunyan’s masterpiece “_The Pilgrim’s Progress____”is a religious allegory, a narrative in which general concepts such as sins, despair, and faith are represented as people or as aspects of the natural world.8.A bout the beginning of the 17th century appeared a school of poets called _____, among whom John Donne was the leading one.9._John Dryden ___ wrote many works on literary criticism, and has been regarded as the earliest literary critic of real important in the history of English literature.10.The main literary achievements of the 17th century lies in the poetry of _____, in the prose writing of _____, and in the plays and literary criticism of _____.II.Choose one or more answers for thefollowing.1.T he revolution of 1688 meant three of the following things EXCEPT _____.A. the supremacy of ParliamentB. the beginning of modern EnglandC. the establishment of a constitutional monarchy in the countryD. the Restoration of monarchy2.J ohn Milton was _____.A. one of the giants of English literature in the 17th centuryB. blind in his later lifeC. a distinguished Revolutionary writerD. the greatest poet and pamphleteer in his age3.“Paradise Lost” is _____.A. a great epic of 12 booksB. based on Bible storyC. written in blank verseD. about the heroic revolt of Satan against God’s authority4.W hich work was not written by John Milton?A. Paradise LostB. Paradise RegainedC. Samson AgonistesD. V olphone5.A mong the poets of the seventeenth century, Milton was the greatest. Besides him, there were two groups of poets. They were _____.A. the lake poetsB. the university witsC. the Metaphysical poetsD. the Cavalier poets.III.Decide whether the following statements are true or false1.E nglish literature of the 17th century witnesses a flourish on the whole.2.T he Revolution period produced one of the most important poets in English literature, William Shakespeare.3.T he main literary form in literature of Revolution Period is drama.4.“The Pilgrim’s Progress” is one of the mostpopular pieces of Christian writing produced during the 17th century.5.J ohn Dryden is the most excellent representative of English classicism in the Restoration period.IV.Answer the following questions1.W hat are the different aspects between the literature of Elizabethan period and the literature of the Revolution period?2.W hat is the story of “Paradise Lost”?3.M ake a comment on the image of Satan in “Paradise Lost”.4.D iscuss the theme and characterization of “Paradise Lost”.5.W hat are the features of Milton’s poetry?。

专业英语Exercise3

专业英语Exercise3

Translate the following sentences:1.He was not to be moved by either advice or entreaties.2.When he entered the room there was a hush of expectancy.3.But reality makes things difficult.现实,实际,真实4.Since he lost his job, he’s been a loner.孤独的人, 不合群的动物Be careful! He is known as a blame-shifter.移动装置(移相器,变速拨叉,印字换行器,搬移者n. 过失, 责备vt. 责备, 归咎于5.He was a regular合格的; 正式的; 公认的; 合乎礼仪的[口]完全的, 真正的, 十足的6.contributo贡献者,捐助者,赠送者r to that magazine.7.He is suggestively silent.提示性的,影射的,暗示的8.She was pardonably proud of her wonderful cooking.w enforcement cannot responsibly stand aloof.10.The apparent cause of his illness was excessive drinking.11.She wanted to find a lonely place to shed private tears.12.We went our separate ways home from the theatre.13.I am no match for him in skill who has operated the lathe for tenyears.14.As she turned the corner she had a new idea which made her stopdead.15.My publishers, with whom I have excellent relations, alwaysgive my new books wide publicity.16.艰巨的任务蓬勃的发展果断的措施进一步努力17.It’s been interesting to talk with you.18.I dare say he is honesty.19.Tell me it was a misunderstanding.20.Don’t let him tell you that.21.Finally I told him where to get off.22.Success at language is more a matter of application than ofintelligence.23.There is more to peace, not just the absence of war or armedconflict.24.He was more shy than unsociable.25.A young men’s first car is less a means of transportation thanmonument to his youthful abandon.26.He has more than repaid her kindness.27.A panda is no more a cat than a dog.28.我们主张民主。

六年级上册英语一课一练Module2Unit6Exercise3∣牛津上海版

六年级上册英语一课一练Module2Unit6Exercise3∣牛津上海版

牛津上海版(一起)2019-2019学年小学英语六年级上册Module 2 Places and activities Unit 6 Goingto school Exercise 3一、将下列词组翻译成英语1.将下列词组翻译成英语(1)乘地铁________(2)乘轻轨________(3)去百货商店________(4)广告牌________2.将下列词组翻译成英语(1)在……路上________(2)警察局________(3)地铁站________(4)邮电局________二、选择合适的单词填空3.It usually takes me about two hours ________ (to go/go) to school by bus.4.Peter ________ (sits/seats) on the bus for ten minutes every day.5.Do you live ________ (near/close) the cinema?6.What's the name ________ (in/of) the street?7.The bus goes very ________ (slow/slowly) because of heavy traffic.8.The children under 5 years old usually go to ________ (a primary school/a kindergarten).9.He left home half ________ (a/an) hour ago. He could catch the bus.三、选择最恰当的答案10.My uncle's daughter is my ________.A. sisterB. auntC. cousinD. brother11.He is ________ Ben some questions ________ public signs.A. asks;toB. asks;asC. asking;about D. asking;to12.—What does that sign mean?—________.A. It means you must keep from the grassB. It means you must keep off the grassC. They mean you shouldn't keep off the grassD. They mean you should keep from the grass13.—Would you like ________ my home?—Yes, ________.A. to come to, I'd like toB. coming, I'd like toC. to come, Ido D. coming, I do14.—What ________ you like ________ a New Year's present?—________ a yo-yo·A. do, as, I'd likeB. would, as, I'd likeC. do, for, I'd like toD. would, as, I'd like to四、根据所给音标,完成句子15.We can see many ________/əd'vɜːtɪsmənt/on both sides of the streets.16.People have to walk when they are in the big ________/'træfɪk/jam.17.—Do you like ________/'trevəlɪŋ/?—Yes, It can make me know more about our country.18.—Where do you play football after school?—I play football on the________/'pleɪgraʊnd/.19.Dick usually goes to work late, today he goes to work ________/'ɜːlɪ/.五、根据要求改写句子20.I like taking the underground to work. (改为一般疑问句)21.We sat on the bus for half an hour. (对划线部分提问)22.Mr Bush goes to work by bicycle. (对划线部分提问)23.My grandparents often go to sleep at 8 p. m..(对划线部分提问)24.There aren't any shops in that street. (改为肯定句)六、阅读理解25.阅读短文,判断下列句子是否与短文内容一致。

五年级上册英语一课一练-Module3Unit2Exercise3∣牛津上海版(一起)(含解析)

五年级上册英语一课一练-Module3Unit2Exercise3∣牛津上海版(一起)(含解析)

牛津上海版(试用本)2018-2019学年小学英语五年级上册Module 3 Places and activities Unit 2 Buying new clothes Exercise 3一、抄写句子1.正确抄写下列句子,注意大小写和标点符号which shorts do you like the blue ones or the green ones二、根据音标词,写出正确的单词2.I like the T-shirt with ________/'bʌtəns/.3.Kitty and her ________/'mʌðʒ/ are at a clothes shop.4.The trousers are too ________/ʃɔːt/for me.5.I put some money in my ________/'pɒkɪt/.三、按要求改写下列句子6.I want a pair of trousers for my birthday. (根据划线提问)7.Kitty usually goes to the cinema at three in the afternoon. (根据划线提问)8.Jill and Kitty like walking in the school garden. (根据划线提问)9.My parents like black and white buttons. (根据划线提问)10.The long zips are twenty yuan. (改为一般疑问句)11.This pocket is small. That pocket is small, too. (合并成一句,但意思不变)12.Kitty and her mother often buy some books. (把often改成now)13.The emperor's coat is new. (改成否定句,但意思不变)四、根据首字母,补全单词14.阅读对话,完成短文,首字母已给。

exercise3

exercise3

Matlab练习题31.用不同线型和颜色在同一坐标内绘制曲线y=2e−0.5x sin(3πx)及其包络线y=2e−0.5x y=−2e−0.5x.2.在[0,2π]上绘制y=k·cos x的图像,k分别等于0.4,0.6,0.8,1.2,1.4.对该图像加标注(图例,坐标轴,图形标题).3.绘制曲线y=x3+x+1,x的取值为[−5,5],加粗该曲线,加网格线.4.在区间[−2,2]中绘制曲线y=x2,以及该函数在(1,1),(−1,1)处的切线,并将切线方程显示在图像中.5.将窗口分割成四个子图,分别绘制y=x2,y=x3,y=√x,y=3√x的图像,使用axis坐标轴控制使图像美观.6.试使用fill函数绘制(1)y=x2与y=x所构成的区域.(2)y=x2,x=1,x轴围成的区域.(3)绘制一个填充的正七边形.(4)用(3)的思想绘制任意正多边形.7.西北五省的面积分别为(万平方千米)新疆甘肃陕西青海宁夏166.545.520.672.3 6.6用饼图分析上述数据(将新疆的切片分离出来).8.最近5届奥运会金牌榜分布如下:19962000200420082012USA4437353646China1628325138Russia2632272324Korea7891313用条形图分析上述数据,分别用分组形式和堆叠形式,并加图例.9.用polar函数绘制下列极坐标方程:(1)对数螺线ρ=2θ(2)三叶玫瑰线ρ=cos3θ,ρ=sin3θ(3)心型线ρ=2(1−cosθ).10.用ezplot函数绘制下列曲线(1)三次抛物线y=2x3,x∈[−3,3].(2)半立方抛物线y2=x3,x∈[0,5],y∈[−5,5].(3)概率曲线y=e−x2,x∈[−5,5](4)笛卡尔叶形线x3+y3−3xy=0,x,y∈[−3,3].(5)星形线x=a cos3θ,y=a sin3θ,分别取a=1,a=2,a=3.。

研究生英语exercise 3

研究生英语exercise 3

Exercise---3用顺译、逆译、分译或综合法将下列各长句译为汉语:1. On August 1, the gunboat began her mission, //which was, //in the eyes of the defenders,// a provocative act and seemed to be part of the overall assault //which had begun on July 31.2. Does it really help society, or the victim, or the victim's family, //to put in jail a man,//who drove a car while drunk, has injured or killed another person?3. When we bought the house// there were small trees growing from the roof, all the windows had gone, and it had not been lived in for many years --- //Indeed it has all but fallen into ruin several times in its long life.4. All they have to do is// to press a button,// and they can see plays, films, operas, and shows of every kind, //not to mention political discussions and the latest exciting football match.5. Fourscore and seven years ago,//our fathers brought forth upon this continent //a new nation, //conceived in liberty and //dedicated to the proposition //that all men are created equal.6. You must fix in mind //the symbols and formulae, definitions and laws of physics,// no matter how complex they may be, //when you come in contact with them, //in order that you may understand the subject better and lay a solid foundation for further study.7. People //were afraid// to leave their houses,// for although the police had been ordered// to stand by// in case of emergency,//they were just as confused and helpless //as anybody else.定语从句的翻译:1. Furthermore, humans have the ability //to modify the environment //in which they live, thus subjecting// all other life forms// to their own peculiar ideas and fancies.2. After the riot, fifty people were taken to the hospital,// many of whom had been innocent bystanders.3. It is he who received the letter// that announced the death of your uncle.4. He had talked to Vice-President Nixon, //who assured him that everything// that couldbe done would be done.5. There is a man downstairs// who wants to see you.6. We used a plane//of which almost every part //carried //some indication of national identity.7. But he did not talk// at length //about the matter,// which was not considered by the White House// to be a particularly important question.8. She opposed the idea, //as might be expected.9. He wishes to write an article //that will attract public attention to the matter.10. He insisted on //buying another coat, //which he had no use for.被动语态的翻译:1. If the scheme is approved, work on the project will start immediately.2. The old man was knocked down by a speeding truck.3. The three machines can be controlled by a single operator.4. The little boy was criticized three times last week.5. Only those parts of the moon //which are lighted up by the sun// are bright.6. Private enterprise and industry were permitted and encouraged.7. It must be dealt with// at the appropriate time //with appropriate means.8. The result of the invention of the steam engine// was// that human power was replacedby mechanical power.9. Rainbows are formed// when sunlight passes through small drops of water //in the sky.10. Communications satellites are used for international living transmission // throughoutthe world.。

Exercise 3

Exercise 3

Impressions of America(Excerpts)Oscar WildeI fear I cannot picture America as altogether an Elysium- perhaps, from the ordinary standpoint and I know little about the country. I cannot give its latitude or longitude; I cannot compute the value of its dry goods, and I have no very close acquaintance with its politics. These are matters which may not interest you, and they certainly are not interesting to me.The first thing that struck me on landing in America was that if the Americans are not the most well-dressed people in the world, they are the most comfortable dressed. Men are seen there with the dreadful chimney-pot hat, but there are very few hatless men; men wear the shocking swallow-tail coat, but few are to be seen with no coat and all. There is an air of comfort in the appearance of the people which is a marked contrast to that seen in this country; where, too often and, people are seen in close contact with rags.The next thing particularly noticeable is that everybody seems in a hurry to catch a train. This is a state of things which is not favorable to poetry or romance. Had Romeo or Juliet been in a constant state of anxiety about trains, or had their minds been agitated by the question ofreturn-tickets, Shakespeare could not have given us those lovely balcony scenes which are so full of poetry and pathos.参考译文美国印象(节录)王尔德我恐怕不能把美国描绘成十足的天堂—从一般的角度来说,也许我对这个国家所知甚少。

五年级上册英语一课一练Module3Unit3Exercise3∣牛津上海版

五年级上册英语一课一练Module3Unit3Exercise3∣牛津上海版

牛津上海版(试用本)2019-2019学年小学英语五年级上册Module 3 Places and activities Unit 3 Seeing the doctor Exercise 3一、将下列单词划线部分的发音归类1.读—读,按音标将下列单词划线部分的发音归类ruler aloud July garden jump full farmwork shoe driver hard number afraid butterglue money purple love book first partycook spoon third(1)/ɜː/________ ________ ________ ________(2)/uː/________ ________ ________ ________(3)/ɑː/ ________ ________ ________ ________(4)/ə/ ________ ________ ________ ________(5)/ʌ/ ________ ________ ________ ________(6)/u/ ________ ________ ________ ________二、选择最恰当的答案2.The sweets are bad ________ your teeth.A. atB. forC. off3.Kitty ________ well today. She's ill.A. isn't feelB. isn't feelingC. is feeling4.________ the small animals are afraid of the tigers.A. BothB. AllC. These5.You have a toothache. Let's go to see the ________.A. dentistB. firemanC. farmer6.—I have a toothache. What shouldn't I do?—You shouldn't ________.A. drink some waterB. eat lunchC. eat too many sweets7.The doctors work ________.A. in the post officeB. in the hospitalC. in the cinema8.You have a cold. You should take some ________.A. riceB. fruitC. medicine9.What's ________ with you?A. wrongB. the wrongC. matter10.—________ do you visit your grandfather?—Once a week.A. How manyB. What timeC. How many times11.—________ animal do you like best?—Pandas.A. WhichB. WhoseC. Where三、按要求改写下列句子12.The tiger likes eating small animals. (改成否定句)13.Don't eat too many sweets. (换一种说法,但意思不变)14.You should wear warm clothes. (对划线部分提问)15.My father goes to America by plane every month. (对划线部分提问)16.The mice are afraid of the cat. (对划线部分提问)17.I take the underground to get to the museum. (对划线部分提问)18.I like the pink shirt. (对划线部分提问)19.I have a cold. (根据答句写出问句)20.They are doctors. (改成单数句)21.Jill has lunch at school from Monday to Friday. (改成一般疑问句)答案解析部分一、将下列单词划线部分的发音归类1.【答案】(1)work;purple;first;third(2)ruler;shoe;glue;spoon(3)garden;farm;hard;party(4)aloud;driver;afraid;butter(5)jump;number;money;love(6)full;book;cook;July【考点】音标【解析】【分析】(1)work中字母or,purple中字母ur,first和third字母ir 发音都是/ɜː/,故答案为work,purple,first,third.(2)ruler中字母u,shoe中字母o,glue中字母u,spoon中字母oo发音都是/uː/ ,故答案为ruler,shoe,glue,spoon.(3)garden,farm,hard,party中字母ar发音都是/ɑː/ ,故答案为garden,farm,hard,party.(4)aloud中字母a,driver中字母er,afraid中字母a,butter中字母er发音都是/ə/ ,故答案为aloud,driver,afraid,butter.(5)jump和number中字母u,money和love中字母o发音都是/ʌ/ ,故答案为jump,number,money,love.(6)full中字母u,book和cook中字母oo,July中字母u发音都是/u/ ,故答案为full,book,cook,July.【点评】本题考查了字母发音,注意相同字母在不同单词的发音不一定相同。

五年级上册英语一课一练Module3Unit3Exercise3∣牛津上海版

五年级上册英语一课一练Module3Unit3Exercise3∣牛津上海版

牛津上海版〔试用本〕2019-2019学年小学英语五年级上册Module 3 Places and activities Unit 3 Seeing the doctor Exercise 3一、将以下单词划线局部的发音归类1.读—读 ,按音标将以下单词划线局部的发音归类ruler aloud July garden jump full farmwork shoe driver hard number afraid butterglue money purple love book first partycook spoon third〔1〕/ɜː/ ________ ________ ________ ________〔2〕/uː/ ________ ________ ________ ________〔3〕/ɑː/ ________ ________ ________ ________〔4〕/ə/ ________ ________ ________ ________〔5〕/ʌ/ ________ ________ ________ ________〔6〕/u/ ________ ________ ________ ________二、选择最恰当的答案2.The sweets are bad ________ your teeth.A. atB. forC. off3.Kitty ________ well today. She's ill.A. isn'tfeel B. isn'tfeeling C. is feeling4.________ the small animals are afraid of the tigers.A. BothB. AllC. These5.You have a toothache. Let's go to see the ________.A. dentistB. fireman C . farmer6.—I have a toothache. What shouldn't I do?—You shouldn't ________.A. drink some waterB. eatlunch C. eat too many sweets7.The doctors work ________.A. in the post officeB. in the hospitalC. in the cinema8.You have a cold. You should take some ________.A. riceB. fruitC. medicine9.What's ________ with you?A. wrongB. thewrong C. matte r10.—________ do you visit your grandfather?—Once a week.A. How manyB. Whattime C. How many times11.—________ animal do you like best?—Pandas.A. WhichB. Whose C . Where三、按要求改写以下句子12.The tiger likes eating small animals. (改成否认句)13.Don't eat too many sweets. (换一种说法 ,但意思不变)14.You should wear warm clothes. (对划线局部提问)15.My father goes to America by plane every month. (对划线局部提问)16.The mice are afraid of the cat. (对划线局部提问)17.I take the underground to get to the museum. (对划线局部提问)18.I like the pink shirt. (对划线局部提问)19.I have a cold. (根据答句写出问句)20.They are doctors. (改成单数句)21.Jill has lunch at school from Monday to Friday. (改成一般疑问句)答案解析局部一、将以下单词划线局部的发音归类1.【答案】〔1〕work;purple;first;third〔2〕ruler;shoe;glue;spoon〔3〕garden;farm;hard;party〔4〕aloud;driver;afraid;butter〔5〕jump;number;money;love〔6〕full;book;cook;July【考点】音标〔1〕work中字母or ,purple中字母ur ,first和third字母ir发音都是/ɜː/ ,【解析】【分析】故答案为work ,purple ,first ,third.〔2〕ruler中字母u ,shoe中字母o ,glue中字母u ,spoon中字母oo发音都是/uː/ ,故答案为ruler ,shoe ,glue ,spoon.〔3〕garden ,farm ,hard ,party中字母ar发音都是/ɑː/ ,故答案为garden ,farm ,hard ,party. 〔4〕aloud中字母a ,driver中字母er ,afraid中字母a ,butter中字母er发音都是/ə/ ,故答案为aloud ,driver ,afraid ,butter.〔5〕jump和number中字母u ,money和love中字母o发音都是/ʌ/ ,故答案为jump ,number ,money ,love.〔6〕full中字母u ,book和cook中字母oo ,July中字母u发音都是/u/ ,故答案为full ,book ,cook ,July.【点评】此题考查了字母发音 ,注意相同字母在不同单词的发音不一定相同。

Exercise 3练习题

Exercise 3练习题

Ⅰ. Match the examples on the left with the correct meaning of the underlined prefixes on the right.Ⅱ. Choose a word from the examples in ExerciseⅠto fill each gap. Write it in the correct form.1.We were all surprised when the king ______________________in favour of his son.2.I was so sad to hear of your uncle’s death. Please give your aunt my _____________.3.After his operation, the patient was fed ____________for several days.4.After four years in the company, he was finally _____________to senior manager.5.If the pilot presses this button, he _____________himself from the plane.6.We asked for _____________rooms at the hotel but they actually put us on differentfloors.7.It’s such a small island that most of the families there are _______________.8.The machine has started ________________ a strange, high-pitched sound.9.A lot of small businesses these days are finding it hard to stay _____________.10.D o you believe that there are ________________beings in outer space?Ⅲ. Match the roots from box A with suitable suffixes from box B to create new words. Use each root and suffix once only.A.B.Ⅳ. Complete these sentences using the suffixes from box B in exerciseⅢ. Use each suffix once only.1.She’s a highly ambitious, career-___________young woman.2.If you want to go swimming with a watch on it will have be water__________.3.He was guilt-__________ when he realized it was all his fault.4.Hilary’s a trust________________ person. I can think of no one better for the job.5.The British are thought to be more class-____________ than the Americans.6.Three staff-______________ protests have taken place in the company in the lastfew months.7.Sugar-_________ chewing gum is better for your teeth than the sugary stuff.8.Athletes often follow a protein-_________ diet to help build their muscles.9.I don’t want to discuss work-__________ issues outside of office hours.10.I don’t really think the new plan is work______________.。

英汉翻译教程3练习

英汉翻译教程3练习

3.从此以后,我就特别注意聋哑人的特征,还从他们那里学会了一些常用的手语。
Since then, I've been always paying much attention to the deaf mute and learnt a couple of sign language from them as well. 比如,我可以用哑语问他们:“朋友,您好!” “您到哪里下车?”“您请往里 走!”“谢谢”等等。 For instance, I can greet them in sign language as"Hello, How are you?" " Where will you get off ?" "Go further inside, please." "Thanks!" and so on. 这样,不仅我能更好地为他们服务,与他们进行感情交流,也减少了一些他们与其他 乘客的误会和纠纷。 In this way, not only can I provide them with good service, set up a friendly relation with them, but also decrease the possibility of misunderstanding and dispute between them and other passengers.
Exercise 3我为乘客服务 How I service the passengers
增添
1.有一次,在拥挤的车厢门口,我听见一位男乘客客客气气地问 他前面的一个女乘客:“您下车吗?”女乘客没理他。“你下 车吗?”他又问了一遍。女乘客还是没理他。“下车吗?”他 耐不住了,放大声问,那女乘客依然没反应。“你是聋子,还 是哑巴?” 他急了,捅了一下那女乘客,也引得车厢的人都往这里看。女乘 客这时也急了,瞪起一双眼睛回手给了男乘客一拳。 Once, I heard a man, at the gate of the crowded cabin, ask politely a woman standing before him. "Would you get off here?" Receiving no response from the woman, he asked again, "Do you get off ?"Again no response from the woman."Get off" asked her impatiently in a loud voice. But there was still no response at all. The man lost his temper,"You are deaf or dumb?"and gave her a slight push. This caused the rest passengers to look to this way. So angry was the woman at this time that she stared at the man and returened him a blow.

牛津上海版六年级下册Unit1 Exercise 3 测试 无答案

牛津上海版六年级下册Unit1 Exercise 3  测试  无答案

Unit1 Exercise 3Ⅰ. Translate the following into English.1. 一些关于……的信息2. 超过1500万人3. 大型百货商店4. 著名的酒店5. 长城6. 喜欢吃寿司=7. 上海的东北方向8. 许多寺庙和沙滩Ⅱ. Fill in the blanks according to the phonetic transcriptions.1. If you like Japanese food, I’ll bring you some ___________.['suːʃɪ]2. Two gardeners help Julia to look after that ___________ [hjuːdʒ] garden.3. You can see some __________['templz] when you visit the city.4. The teacher took the students to visit the _______________[dɪ'pɑːtm(ə)nt] stores.III. Choose the best answer.()1. There is _________ about studying abroad in today’s newspaper.A.one informationB. an informationC. a piece of informationD. a piece information() 2. There are about 12 _________ people in Tokyo.A. millionB. millionsC. million ofD. millions of() 3. It took us ninety minutes _________ to the temple.A. getB. to getC. gettingD. to getting() 4. They _________ love eating spicy food.A. tooB. alsoC. as wellD. either() 5. —_________ did you go to school this morning?—By taxi.A. WhatB. WhereC. WhenD. How() 6. There will _________ a school basketball game next week.A. haveB. isC. hasD. be() 7. How long _________ it take to _________ Canada from China by plane?A. does, travel toB. does, travelC. is, travel toD. is, travel () 8. The new computer _________ him 4,000 yuan.A. costB. spentC. tookD. paid() 9. In the past, people usually _________ to work by bus or bike.A. goB. wentC. goesD. are going() 10. —_________ is it from here to your school?—About ten minutes’ walk.A. How longB. How soonC. How farD. How often IV. Complete the sentences with the given words in their proper forms.1. Joe and Peter like in a pool in summer, (swim)2. Lucy is a good dancer. She dances . (beautiful)3. Thousands of visit the Disneyland Park every day. (tour)4. It’s my to show you around our school. (please)5. Mid-autumn Day is on the fifteenth of the lunar month of the year, (eight)V. Rewrite the sentences. (根据要求改写句子)1. Joe has a younger sister and brother.(改为一般疑问句)Joe a younger sister or brother?2.Peter read some interesting stories last weekend.(改为否定句)Peter read interesting stories last weekend.3.It’s 300 kilometres from Shanghai to Nanjing.(对画线部分提问)_____________is it from Shanghai to Nanjing?4.Foreign visitors always visit the Great Wall.(对画线部分提问)__________ ____________foreign visitors always visit?5.There are over 1.4 billion people in China.(保持原句意思)There are 1.4 billion people in China.6.good fun, different countries, to, it is, travel to (连词成句)________________________________________________________________________ VI. Fill in the blanks with proper words.Camping holidays are always welcomed by students and young people—theyare a cheap and easy way to see the country. People often travel by train, by bus oron foot. One thing is important to remember before starting: you can only take withyou what you can carry—usually in a bag on your b ____1If you travel with a friend, of course you can s____2 some things with him/her: a tent, a stove or food. Other things must be taken by yourself—clothes , sports shoes and a sleeping bag.So you must be sure of how much you can carry. Most people find that about 10 kilograms is all r __3___. More than that means that you need another holiday when you get home! And remember, if the weather is wet, your backpack is h ___4Many people who go camping for the first time take too much, but then find they have forgot something they really need—a tin of beans is no good w __5 a tin opener! But with practice and good advice, you can have a better holiday.L ____2. ____3. ________ 4. ____ 5. ____________VII. Answer the questions.Hawaii is a beautiful place. People from other parts of the world want to see the beautiful islands in the middle of the Pacific Ocean. It's amazing for people to watch the sunset in the evening. TheSun is dropping like a red ball into the sea in lhe west. The Sun is falling so quickly that you caneven see it moving down.About two thousand years ago, the first group of people went to Hawaii in very small boats. They found the beautiful white sand beaches and palm trees. But it was difficult forpeople to go to Hawaii at that time. Now people can get lo Hawaii in different ways. Lots ofnice big hotels have been built in the past thirty years.However, the nice natural views in Hawaii haven't changed much. The white sand beaches and palm trees are still there. People often have a quiet time, taking a walk along the beach in the morning. At night, they usually get together to have parties, chat and dance. So if you are thinking about having a holiday, Hawaii can be a good place to see.1.Where are Hawaii islands?_________________________________________________________________________2.When did the first group of people go to Hawaii?_________________________________________________________________________3.How can people go to Hawaii now?__________________________________________________________________________4.I there much pollution in Hawaii now?——————————————————————————————————————5.What do people usually do in Hawaii at night?。

Exercise 3-推荐下载

Exercise 3-推荐下载

Time Limit 45minsPART II. READINGDirections: There are four passages in this part. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A ) , B ) , C) and D ). You should decide on the best choice.Passage 1Research indicates that parents who reward self-control and independence tend to have children with high achievement motivation. Such parents set high standards for their children but allow them to work at their own level and to make their own mistakes. By contrast, parents of low-need achievers typically set impossibly high goals for their children and make extreme demands. In addition, parents of high-need achievers encourage good performance but do not berate their children when they fail. If a child comes home from school with four As and one B on a report card, the parents focus on the As; parents of a potential low-need achiever tend to ask, “Why the B?” Parents of high-need achievers respond to average grades with warmth and suggestions for reasonable goals and ways to reach them. Parents of low-need achievers might say, “You’re dumb and lazy and you’ll never amount to anything”, and punish the child. When a child is having trouble with a math problem, the parent of a potentially high-need achiever will suggest the general procedure and let the child work out the particular solution; a low-need achiever’s parent will solve the problem and then hand the child the answer.That needs for achievements exist within all of us, to varying degrees, is undeniable. And although biological bases for at least the achievement need have been proposed, a great deal more is known about the psychological bases of these needs and how they come about. Closely related to motivation are emotions, which can activate and direct behavior in much the same way as physiological, social, and psychological motivations do.31. according to the passage, parents of low-need achievers ________.A. usually leave their children aloneB. set too high standards for their childrenC. allow for failure on the part of their childrenD. control their children to a minimum degree32. In the fourth sentence of Paragraph 1, the word “berate” probably means ________.A. praiseB. criticizeC. observeD. neglect33. What will parents of high-need achievers do if their children don’t get good marks for allcourses?A. Criticize them for the lower marks and praise them for the good.B. Praise them and give some suggestions for further improvement.C. Praise them for the good marks and reward them.D. Criticize them for the lower marks and punish them.34. If a child has difficulty with his / her homework, a parent of a low-need achiever _______.A. tell him the answer directlyB. give him some suggestionsC. let him solve the problem by himselfD. scold and punish him35. The passage is mainly about the role of ________.A. reward in promoting their children’s studyB. self-control and independence in child growthC. emotional reaction in promoting achievementD. praise in promoting desired behaviorPassage 2Scratchy throats, stuffy noses and body aches all spell misery, but being able to tell if the cause is a cold or flu may make a difference in how long the misery lasts.The American Lung Association (ALA) has issued new guidelines on combating colds and the flu, and one of the keys is being able to quickly tell the two apart. That’s because the prescription drugs available for the flu need to be taken soon after the illness sets in. As for colds, the sooner a person starts taking over-the-counter remedy, the sooner relief will come.The common cold and the flu are both caused by viruses. More than 200 viruses can cause cold symptoms, while the flu is caused by three viruses — flu A, B and C. There is no cure for either illness, but the flu can be prevented by the flu vaccine, which is, for most people, the best way to fight the flu, according to the ALA.But if the flu does strike, quick action can help. Although the flu and common cold have many similarities, there are some obvious signs to look for.Cold symptoms such as stuffy nose, runny nose and scratchy throat typically develop gradually, and adults and teens often do not get a fever. On the other hand, fever is one of the characteristic features of the flu for all ages. And in general, flu symptoms including fever and chills, sore throat and body aches come on suddenly and are more severe than cold symptoms.The ALA notes that it may be particularly difficult to tell when infants and preschool age children have the flu. It advises parents to call the doctor if their small children have flu-like symptoms.Both cold and flu symptoms can be eased with over-the-counter medications as well. However, children and teens with a cold or flu should not take aspirin for pain relief because of the risk of Reye syndrome (综合症),a rare but serious condition of the liver and central nervous system.There is, of course, no vaccine for the common cold. But frequent hand washing and avoiding close contact with people who have colds can reduce the likelihood of catching one.36. According to the author, knowing the cause of the misery will help ________. A. shorten the duration of the illness B. the patient buy medicine over the counter C. the patient obtain cheaper prescription drugs D. prevent people from catching colds and the flu37. We learn from the passage that ________. A. one doesn’t need to take any medicine if he has a cold or the flu B. aspirin should not be included in over-the-counter medicines for the flu C. delayed treatment of the flu will harm the liver and central nervous system D. over-the-counter drugs can be taken to ease the misery caused by a cold or the flu38. According to the passage, to combat the flu effectively, ________. A. one should identify the virus which causes it B. one should consult a doctor as soon as possible C. one should take medicine upon catching the disease D. one should remain alert when the disease is spreading39. Which of the following symptoms will distinguish the flu from a cold?A. A stuffy nose.B. A high temperature.C. A sore throatD. A dry cough.40. If children have flu-like symptoms, their parents ________. A. are advised not to give them aspirin B. should watch out for signs of Reye syndrome C. are encouraged to take them to hospital for vaccination D. should prevent them from mixing with people running a feverPassage 3To call someone bird-brained in English means you think that person is silly or stupid. But will this description soon disappear from use in the light of recent research? It seems the English may have been unfair in associating birds' brains with stupidity.In an attempt to find out how different creatures see the world, psychologists at Brown University in the U.S.A. have been comparing the behaviour of birds and humans. One experiment has involved teaching pigeons to recognize letters of the English alphabet. The birds study in “classrooms”, which are boxes equipped with a computer. After about four days of studying a particular letter, the pigeon has to pick out that letter from several displayed on the computer screen. Three male pigeons have learnt to distinguish all twenty-six letters of the alphabet in this way.A computer record of the birds' four-month study period has shown surprising similarities between the pigeons’ and human’s performance. Pigeons and people find the same letters easy, or hard to tell apart. For example, 92 percent of the time the pigeons could tell the letter D from the letter Z. But when faced with U and V(often confused by English children), the pigeons were right only 34 percent of the time.The results of the experiments so far have led psychologists to conclude that pigeons and humans observe things in similar ways. This suggests that there is something fundamental about the recognition process. If scientists could only discover just what this recognition process is, it could be very useful for computer designers. The disadvantage of a present-day computer is that it can only do what a human being has programmed it to do, and the programmer must give the computer precise, logical instructions. Maybe in the future, though, computers will be able to think like human beings.41. The writer suggests that the expression “bird-brained” might be out of use soon because it is ________.A. sillyB. impoliteC. unnecessaryD. inappropriate42. Psychologists have been experimenting with pigeons to find out whether the birds ________. A. are really silly or stupid B. see the world as human beings do C. can learn to make ideas known to people D. learn more quickly than children43. U and V are confused byA. many English childrenB. 92 percent of pigeonsC. most people learning EnglishD. 34 percent of pigeons44. There are similarities in observing things by pigeons and humans ________. A. because pigeons are taught by humans B. because pigeons have brains more developed than other birds C. because pigeons and humans have similar brains D. because their basic ways to know the world are the same45. The research may help A. psychologists B) computer salesmen C. computer designers D) teachersPassage 4If you know exactly what you want, the best route to a job is to get specialized training. A recent survey shows that companies like graduates in such fields as business and health care who can go to work immediately with very little on-the-job training. That’s especially true of booming fields that are challenging for workers. At Cornell’s School of Hotel Administration, for example, bachelor’s degree graduates get an average of four or five job offers with salaries ranging from the high teens to the low 20s and plenty of chances for rapid advancement. Large companies, especially, like a background of formal education coupled with work experience. But in the long run, too much specialization doesn’t pay off. Business, which has been flooded with MBAs, no longer considers the degree an automatic stamp of approval. The MBA may open doors and command a higher salary initially, but the impact of a degree washes out after five years. As further evidence of the erosion (销蚀) of corporate (公司的) faith in specialized degrees, Michigan State’s Scheetz cites a pattern in corporate hiring practices. Although companies tend to take on specialists as new hires, they often seek out generalists for middle- and upper-level management. “They want someone who isn’t constrained (限制) by nuts and bolts to look at the big picture,” says Scheetz. This sounds suspiciously like a formal statement that you approve of the liberal-arts graduate. Time and again labor-market analysts mention a need for talents that liberal-arts majors are assumed to have: writing and communication skills, organizational skills, open-mindedness and adaptability, and the ability to analyze and solve problems. David Birch claims he does not hire anybody with an MBA or an engineering degree. “I hire only liberal-arts people because they have a less-than-canned way of doing things,” says Birch. Liberal-arts means an academically thorough and strict program that includes literature, history, mathematics, economics, science, human behavior — plus a computer course or two. With that under your belt, you can feel free to specialize. “A liberal-arts degree coupled with an MBA or some other technical training is a very good combination in the marketplace,” says Scheetz.46. What kinds of people are in high demand on the job market? A. Students with a bachelor’s degree in humanities. B. People with an MBA degree from top universities. C. People with formal schooling plus work experience.D. People with special training in engineering.47. By saying “... but the impact of a degree washes out after five years” (Line3,Para.3), theauthor means ________. A. most MBA programs fail to provide students with a solid foundation B. an MBA degree does not help promotion to managerial positions C. MBA programs will not be as popular in five years’ time as they are now D. in five years people will forget about the degree the MBA graduates have got48. According to Scheetz’s statement (Lines3-4, Para.4), companies prefer ________. A. people who have a strategic mind B. people who are talented in fine arts C. people who are ambitious and aggressive D. people who have received training in mechanics49. David Birch claims that he only hires liberal-arts people because ________. A) they are more capable of handling changing situations B) they can stick to established ways of solving problems C) they are thoroughly trained in a variety of specialized fields D) they have attended special programs in management50. Which of the following statements does the author support? A) Specialists are more expensive to hire than generalists. B) Formal schooling is less important than job training. C) On-the-job training is, in the long run, less costly. D) Generalists will outdo specialists in management.Passage 5The train clattered over points and passed through a station.Then it began suddenly to slow down, presumably in obedience to a signal. For some minutes it crawled along, then stopped; presently it began to move forward again. Another up-train passed them, though with less vehemence than the first one. The train gathered speed again. At that moment another train, also on a down-line, swerved inwards towards them, for a moment with almost alarming effect. For a time the two trains ran parallel, now one gaining a little, now the other. Mrs. McGillicuddy looked from her window through the windows of the parallel carriages. Most of the blinds were down, but occasionally the occupants of the carriages were visible. The other train was not very full and there were many empty carriages.At the moment when the two trains gave the illusion of being stationary, a blind in one of the carriages flew up with a snap. Mrs. McGillicuddy looked into the lighted first-class carriage that was only a few feet away.Then she drew her breath in with a gasp and half-rose to her feet.Standing with his back to the window and to her was a man. His hands were round the throat of a woman who faced him, and he was slowly, remorselessly, strangling her. Her eyes were starting from their sockets, her face was purple. As Mrs. McGillicuddy watched, fascinated, theend came; the body went limp and crumpled in the man’s hands.At the same moment, Mrs. McGillicuddy’s train slowed down again and the other began to gain speed. It passed forward and a moment or two later it had vanished from sight.Almost automatically Mrs. McGillicuddy’s hand went up to the communication cord, then paused, irresolute. After all, what use would it be ringing the cord of the train in which she was travelling? The horror of what she had seen at such close quarters, and the unusual circumstances, made her feel paralysed. Some immediate action was necessary — but what?The door of her compartment was drawn back and a ticket collector said, “Ticket, please.”51. When Mrs. McGuillicuddy’s train passed through a station, it ________.A. gained speed suddenlyB. kept its usual speedC. changed its speedD. stopped immediately52. Mrs. McGuillicuddy seems to be a (an) ___ person.A. observantB. interestedC. noisyD. nervous53. What did Mrs. McGuillicuddy happen to witness?A. A quarrelB. A murderC. An intimate sceneD. A fight54. What Mrs. McGuillicuddy saw in the parallel train made her feel ________.A. excitedB. anxiousC. worriedD. horrified55. Mrs. McGuillicuddy didn’t ring the communication cord immediately because ________.A. she was very much afraidB. there was no point of doing soC. she was too shocked to moveD. the ticket collector came inPART III. VOCABULARY & STRUCTURE 〖15 points, 0.5 point each〗56.He was ______ to steal the money when he saw it lying on the table.A.draggedB.temptedC.elicitedD.attracted57.To survive in the intense trade competition between countries, we must _____ the qualitiesand varieties of products we make to the world-market demand.A.improveB.enhanceC.guaranteeD.gear58.House buyers usually have a large initial __________on carpets and furniture.A.moneyB.timeC.choiceD.outlay59.__________, he’s in charge, but not in fact his secretary takes all the decisions.A.FranklyB.TheoreticallyC.HonestlyD.In theory60.The rain had __________right through (his clothes) to his skin.A.passedB.goneC.penetratedD.poured61.Marriage at this stage could be__________ to your career.A.helpB.damageeD.fatal62.Mary was a book-lover. She used to__________ a big bill at the bookstore.A.sum upB.take upC.run upD.run into63.____________the increasing air pollution, we must be clearly aware that it threats all humanbeings.A.But forB.Not forC.ForD.As fore and sit by the fire - you look ______to the bone..A.chilledB.wetC.coldD.terrible65.He ignored the persistent ringing, thinking that important messages would _________himsooner or later.A.callB.reacheD.pass66.This local magazine which made its first appearance less than a year ago has already had a_________of 500,000.A.publicationB.numberC.circulationD.size67.The helicopters will be used to send the rescue team to the scene of disaster________ anemergency.A.ifB.in caseC.in case ofD.whenever68.Ministers must appear before parliament and _________their actions.A.makeB.proveC.call onD.justify69.He meant to paint a portrait for her, but he _____________only a sketch.A.ended inB.ended up withC.finishedD.ended up by70._____________the expense, I simply can’t afford the time to go sightseeing in Nanjing.A.BesidesB.Not to mentionC.Apart fromD.Except for71.Trying to set a good example for his team members, he was always the first one at practiceand the last one___ .A.leavingB.having leftC.being leftD.to leave72.Failures are more likely to hit________ .A.the unready and the unluckyB.unready and unluckyC.one unready and unluckyD.each unready and unlucky73.The rescue team reported that the water___ cold.A.was feelingB.had been feelingC.feelsD.felt74.Margaret Mead, who sought___ the young and old to each other in a recent lecture, wassympathetic to the young.A.explainingB.to explainC.explanationsD.explained75.Charlie is gentle by nature, but___ rude this time.A.isB.is beingC.beingD.seeming76.---Shall I give you a check?---I’d rather you___ cash.A.payB.paidC.payingD.to pay77.A: Do you want Susan to repair it herself?B: I’d prefer her___ the electrician.A.ringB.rangC.to ringD.will ring78.The government doesn’t wish Dr. Smith___ a professorship at a foreign university.A.will acceptB.to acceptC.acceptsD.accepting79.John is determined to get a ticket even if it means___ in a queue all night.A.standingB.to standC.standD.will have to stand80.In spite of___ has been said about genetically modified food, most people remain skeptical.A.all whatB.all thatC.all whichD.all it81.For the first time in her life, she___ a sense of fulfillment.A.feltB.has feltC.to feelD.has been feeling95. A. origins B. originals C. discoveries D. resources96. A. concerned B. itself C. available D. oneself97. A. players B. followers C. fans D. pioneers98. A. for B. as C. with D. by99. A. months B. weeks C. hours D. times100A. demonstrated B. composed C. hosted D. formed101A. demonstration B. procession C. body D. march102A. Even B. Therefore C. Furthermore D. But103A. number B. members C. body D. relations104A. sad B. solemn C. happy D. funeral105A. whistled B. sung C. presented D. showedKeys to Exercise 2Part II. Reading (25%, 1 point each)31-35 BCBAB36-40 ADBBA41-45 DBADC46-50 CBAAD51-55 CABDB Part III. Vocabulary & Structure (15%, 0.5 point each)56-60BDDBC61-65DCDAB66-70CCDBC71-75DADBB76-80BCBAB 81-85ACABAPart IV. Cloze (10%, 0.5 point each)86-90BDCDC91-95BADAA96-100BDBCD101-105BDBCC。

exercise3

exercise3

Unit 3 exercises1 The polymerization rate may be experimentally followed by measuring the changes in any of several properties of the system such as density, refraction index, viscosity, or light absorption. Density measurements are among the most accurate and sensitive of the techniques. The density increases by 20-25 percent on polymerization for many monomers. In actual practice the volume of the polymerizing system is measured by carrying out the reaction in a dilatometer. This specially constructed vessel with a capillary tube which allows a highly accurate measurement of small volume changes. It is not uncommon to be able to detect a few hundredths of a percent polymerization by the dilatometer technique.聚合速率可以通过测量体系一些性质的变化进行试验跟踪。

这些性质有密度,折射指数,黏度,光吸收。

密度测量是最准确和灵敏的技术。

对许多单体来说,聚合物的密度可提高20-25%。

实际上,聚合体系的体积通过在膨胀计中进行反应来测量。

英语国家概况练习exercise3

英语国家概况练习exercise3

英语国家概况练习exercise3A review of United KingdomI. Complete the blanks within three words.1.The "National Curriculum", established in 1988, provides ______ for education inEngland and Wales between the ages of _______ ;2.In each country there are______ of education: early years, primary, secondary,Further Education (FE) and Higher Education (HE). Education is ______ for all children between the ages of 5 (4 in Northern Ireland) and 16; before this children can be educated _______ .3.Both English law, which applies in _______ , and Northern Ireland law are basedon ________ principles.4.The _______ of the United Kingdom that meets in the Palace of Westminster hastwo houses; an ______ House of Commons and an ______ House of Lords. All bills passed are given _______ before becoming law.5.The UK has a partially regulated ______ economy. Based on market exchangerates the UK is today the _______ economy in the world. London is ________ financial centre alongside New York. The______ is the UK's central bank and is responsible for issuing ______ in the nation's currency, the pound sterling.6.Historically, indigenous British people were thought to be descended from the________ that settled there before the 11th century: the Celts, ________ and the Normans.7.As a result of the British Empire, British influence can be observed in thelanguage, culture and legal systems of many of _______ .8.In ______ , the kingdoms of England, Scotland and Ireland were united in ______when James VI, King of Scots, inherited the crowns of England and Ireland and moved his court from Edinburgh to London; each _______ nevertheless remaineda separate political entity and retained its separate political, legal, and religiousinstitutions. The term '______' became official in 1801 when the parliaments of Britain and Ireland each passed an Act of Union, uniting the two kingdoms and creating the _______ of Great Britain and Ireland.9.The British Empire reached its greatest extent, covering a fifth of the ______ anda quarter of _______. However, the UK had suffered 2.5 million casualties andfinished the war with a huge national debt.10.Scottish Independence is back on the agenda. The Scottish Government will holdon 18 September 2014. If passed Scotland will become ______ independent of the other nations within the current UK.II. Answer the following questions with words or expressions.1.What are the (three) functions of the British government in the economic field?2.What are the (five) major linguistic influences on English?3.What are the (seven) individual contributions to the making of English?4.What are (four) periods of the British history?5.What are the differences between English Commonwealth and BritishCommonwealth?6.What is GCSE?III. Explain the following within 3-5 sentences.1.The Briton;2.the English Renaissance;3.The Wealth of Nations;4.Francis Bacon5.Industrial RevolutionIV. Describe the picture below.。

Exercise 3

Exercise 3

1.If the simple graph G has v vertices and e edges, how many edges does G have?Solution The complete graph with v vertices has v(v-1)/2 edges.Hence, G have v(v-1)/2-e edges.2. Show that a simple graph G with n vertices is connected if it has more than (n-1)*(n-2)/2 edges.Proof Suppose that G is not connected. One of the components of G has k (1≤k ≤ n -1) verticesand k*(k-1)/2 edges. The number of edges of G is not more than (k*(k -1) + (n -k ) (n -k -1))/2=k 2-nk +(n 2-n )/2. K2-nk + (n 2-n )/2 reach to its minimum value when k=n/2.When k=1 or k=n-1 the functionreach to its maximum value (n -1) (n -2)/2. This means that G is not connected if it has not more than(n -1) (n -2)/2 edges.3. Suppose that a connected planar simple graph with e edges and v vertices contains no simplecircuits of length 4 or less. Show that e ≤(5/3)v -(10/3) if v ≥4.Proof: A connected planar simple graph drawn in the plane divides the plane into regions, say r ofthem. The degree of each region is least 5(Since the graphs discussed here are simple graphscontains no simple circuits of length 4 or less.)rR e 5R regions all )deg(2≥=∑Hence, (2/5)e ≥r. Using r=e-v+2 we obtained e-v+2 ≤(2/5)e. It follows that e ≤(5/3)v-(10/3). Q. E. D.4. The intersection graph of a collection of sets is the graph whose vertices are the sets in thecollection, in which an edge joins two sets if the two sets are not disjoint. Consider the intersectiongraph of the set of all two-element subsets of {1, 2, 3, and 4}. You will find that this graph has 6vertices and 12 edges.1) Draw a picture of this graph.2) Write down the adjacency matrix of this graph.3) Determine whether this graph is bipartite.4) What is wrong the following “proof” that this graph is planar? Since v=6 and e=12, the inequalityfor planar graphs e ≤3v-6 is satisfied; therefore the graph is planar. Determine whether this is infact a planar graph.5) Find the chromatic number of this graph.6) Determine whether this graph has a Hamilton circuit and whether it has an Euler circuit.Solution: 1)14⎥⎥⎥⎥⎥⎥⎥⎥⎦⎤⎢⎢⎢⎢⎢⎢⎢⎢⎣⎡011110101101110011110011101101011110 2) The adjacency matrix is as follows,Where we are using the followingOrder of the vertices: 12, 13, 14, 23, 24, 343) A bipartite can contain no triangle. This graph contains many triangles, such as 12-13-23.Therefore it is not bipartite.4) The theorem being applied here gives a necessary condition for a graph to be planar, not a sufficient condition. There are many graphs that satisfy this condition and yet are not planar (K3, 3, for instance).5)36) This graph has an Euler circuit and a Hamilton circuit.5. Seven variables occur in a loop of a computer program. The variables and the steps during which they must be stored are: t: steps 1 through 6; u: step 2;v:steps 2 through 4;w:steps 1,3 and 5;x:steps 1 and 6;y:steps 3 through 6; and z: steps 4 and 5. How many different index registers are needed to store these variables during execution?Solution step 1:t,w,x step 2: t,u,v, step 3:t,v,w,y step 4: t,v,y,z step 5:t,w,y,z step 6: t,x,y,vThe chromatic number of this graph is 5. Hence 5 different index registers are needed to store these variables during execution.6. Suppose 1000 people enter a chess tournament. Use a rooted tree model of the tournament to determine how many games must be played to determine a champion, if a player is eliminated after one loss and games are played until only one entrant has not lost.(Assume there are no ties.) SolutionWe can construct a full 2-ary tree as a rooted tree model of the tournament. Let i be the number of internal vertices and l the number of leaves in this tree. The number of leaves in this tree is l =1000, the number of internal vertices is the number of games that must be played to determine a champion. Hence, the number of games that must be played to determine a champion is i = (l -1)/ (m -1) =999.7. Construct the binary tree with prefix codes representing the following coding scheme: a:11,e:0,t:101,s:100a s8. When must an edge of a connected simple graph be in every spanning tree for this graph? (Solution cut edge)Which connected simple graphs have exactly one spanning tree?(Solution tree)9. Show that a simple planar graph G which has less than 30 edges has a vertex whose degree is less than or equals to 4.Proof Suppose that the degree of every vertices of G is more than or equals to 5.That is deg(vi) ≥5.∵2e=∑deg(vi) ≥5n(n is the number of vertices).∴n ≤2e/5∵e≤3n-6 ∴e≤6e/5-6 e ≥30.It’s in contradiction to that G has less than 30 edges.10 Determine whether the given graph has an Euler circuit or a Hamilton circuit and whether the graph is planar or bipartite?G HGraph G does not have an Euler circuit and has a Hamilton circuit. It’s neither planar nor bipartite.Graph H does not have an Euler circuit and has a Hamilton circuit. It’s neither planar nor bipartite.11. Fill in the blanks1) Kn has edges and vertices.2) Qn has edges and vertices.3) The length of the longest simple circuit in W10 is4) List all n such that Cn is bipartite .5) The adjacency matrix for Km,n has columns.6) There are 1s and 0s in the adjacency matrix for Cn.7) The incidence matrix for Wn has rows and columns.8) List all the positive integers n such that Kn has an Euler circuit n odd9) List all the positive integers n such that Qn has an Hamilton circuit all n except n=110) The vertex chromatic number for K7,7= 2 .11. Mark each of the following T(TRUE) or (F)FALSE.a) Every tree is bipartite. Tb) There is a tree with degree 3,2,2,2,1,1,1,1,1 F。

exercise 3答案

exercise 3答案

Exercise 3Class__________ Name _______________No. ________ Score ___________I often meet the old man ______________.A. on my way to homeB. in my way to homeC. in my way homeD. on my way homeHow long do you spend ________ video games every week?’A. playB. playingC. playsD. to playThe beach is far from the supermarket. It will take you ____ 2 hours to get there by bus.A. onlyB. quiteC. almostD. pastOur group will start at 8:00 __________ tomorrow morning.A. inB. onC. atD. /Which of the signs _______ often seen in a park?A: have B: has C: is D: areA: Excuse me, where is the teachers’ office?B: Go _________first, then turn left, and you won’t miss it.A: downstairs B. to the downstairs C. to downstairs D. downstairI like my _______. I finish ________ at 5:00 p.m.A: job… job B: job … work C: work … job D: work … workMrs. Green is a _____________ , she likes her job. (busy)Miss Guo was an _______ three years ago. (art)The _________ time is delayed. (arrive)Mark ________ me to his birthday party, so he sent me an _______ yesterday. (invite)We mustn’t sing _______ at night. (loud)There are a lot of people at the ___________. (enter)When my mother was twelve years old, she went to the __________school. (second)Ben wants to be a doctor. (划线部分提问)________ _______ ______ Ben ______ to _______?We have rules in the school. (划线部分提问)________ ______ we _________ rules?I’d like to be a teacher because I like children. (划线部分提问)______ _______ you ______ to be a teacher?Every day Miss Lu gets to school at ten past seven. (改写成同义句)Every day Miss Lu gets to school at _______ ______.Mr Smith is our English teacher. (改写成同义句)Mr. Smith ________ _______ English.It took me twenty minutes to clean the room. (改写成同义句)______ _______ twenty minutes _________ the room.KEY Ex 3D B C D D A B businesswomanartistarrivalinvited invitation loudlyentrancesecondaryWhat job does want do Where do haveWhy would like seven tenteaches usI spent cleaning。

英语专业美国文学试题exercise3

英语专业美国文学试题exercise3

Exercise ThreeⅠWriting the names of the authors.(10%)1. ( ) The Prince and the Pauper2. ( ) Annabel Lee3. ( ) A Farewell to Arms4. ( ) Nature5. ( ) A Streetcar Named Desire6. ( ) The Road Not Taken7. ( ) The Adventures of Tom Sawyer8. ( ) Because I Could Not Stop for Death 9. ( ) Song of Myself 10. ( ) The Scarlet LetterBlank Filling .(10%)1. In the novel , Hemingway portrayed an old fisherman named Santiagowho shows triumphant even in defeat.2. defined poetry as the rhythmical creation of beauty.3. While working for the Virginia City Territorial Enterprise , Samuel LanghorneClemens adopted the pseudonym , the way of a boatman taking soundings, and meaning two fathoms.4. With the publication of The Sun Also Rises, Hemingway became the spokesmanfor what Gertrude Stein had called “ ”.5. When it was first published, Walt Whitman ’s collection of poems ___________,failed to gain acceptance from either the majority of critics or the general public. Ⅲ. Multiple Choice. (30%)1. Which of the following statements about The Scarlet Letter is NOT true? A. It explores man ’s never-ending search for the satisfaction of materialistic desires.B. It relates the conflicts between the society and the individual.C. It is about the effect of sin on the people involved and the society as a whole.D. It presents a psychological analysis of the inward tensions of the characters.2. Mark Twain, one of the greatest 19th century American writers, is well known for his ______.A. international themeB. waste-land imageryC. local colorD. symbolism3. According to Hawthorne, the scarlet letter "A" which originally stood for "_______" finally obtained the meaning of "able" or "angel" through Hester’s efforts.A. adulteryB. arroganceC. accomplishmentD. agony4. Robert Frost is a regional poet in the sense that his poems are mainly concerned about the _______.A. life in New YorkB. country life in New EnglandC. sea adventuresD. life on the Mississippi5. With Howells, James, and Mark Twain active on the literary scene, __ became the major trend in American literature in the seventies and eighties of the 19th century.A. sentimentalismB. romanticismC. realismD. naturalism6. Walt Whitman was a pioneering figure of American poetry. His innovation first of all lies in his use of __ , poetry without a fixed beat or regular rhyme scheme.A. blank verseB. heroic coupleC. free verseD. iambic pentameter7. Hester Prynne, Dimmsdale, Chillingworth and Pearl are most likely the names of the characters in ___ .A. The Scarlet LetterB. The House of the Seven GablesC. The Portrait of a LadyD. The pioneers8. After The adventures of Tom Sawyer, Twain gives a literary independence to Tom's buddy Huck in a book entitled ___ .A. Life on the MississippiB. The Gilded AgeC. The Adventures of Huckleberry FinnD. A Connecticut Yankee in King Arthur's Court9. The Hemingway Code heroes are best remembered for their __ .A. indestructible spiritB. pessimistic view of lifeC. war experiencesD. masculinity10.Transcendentalist doctrines found their greatest literary advocates in_______and Thoreau.A.JeffersonB.EmersonC.FreneauD.Oversoul11.From the following, choose the poems NOT written by Adgar Allan Poe.A. To HelenB. The RavenC. Annabel LeeD. Design12.Which is regarded as the “Declaration of Intellectual Independence”?A. The American ScholarB. English TraitsC. The Conduct of LifeD. Representative Men13.The most famous 19th century American female poet during the nineteenth century was ___________.A.Anne BradstreetB.Jane AustenC.Emily DickinsonD.Harriet Beecher Stowe14.Choose the works NOT written by Mark Twain.A. The Adventures of Tom SawyerB. A Farewell to ArmsC. Life on the MississippiD. The Prince and the Pauper15.Choose the works NOT written by Nathaniel Hawthorn.A. The Adventures of Tom SawyerB. The House of the Seven GablesC. Twice Told TalesD. The Scarlet Letter(10%)1. All his literary life, Hawthorne seemed to be haunted by his sense of sinand evil in life.2. Transcendentalism exalted feeling over reason, individual expression overthe restraints of law and custom.3. The sound of Whitman ’s words casts a magic spell over the readers. His toneis awesome, sad and melancholy.4. Mark Twain had, as his aim of writing, the soul, the life, and the speechof the people in mind.5. Most of the poems in Leaves of Grass are about man and nature.6. Frost ’s concern with nature reflected his deep moral uncertainties.7. In 1954, T. S. Eliot was awarded a Nobel Prize for his “mastery of the artof modern narration.”8. Hemingway ’s works have sometimes been read as an essentially negativecommentary on a modern world filled with sterility, failure, and death. 9. Women writers have only had a very insignificant role in American literature. 10. According to Dickinson, death means immortality. (20%)Passage 1Lo! in you brilliant window-niche How statue-like I see thee stand, The agate lamp within thy hand! Ah, Psyche, from the regions whichAre Holy-Land!Questions:1. This is the last stanza of a poem . Its writer is ______________.2. With whom is Helen associated in this stanza?3. Comment on the beauty of this poem.Passage 2Hester Prynne ’s term of confinement was now at an end. Her prison-door was thrown open, and she came forth into the sunshine, which, falling on all alike, seemed, to her sick and morbid heart, as if meant for no other purpose than to reveal the scarlet letter on her breast. Perhaps there was a more real torture in her first unattended footsteps from the threshold of the prison, than even in the procession and spectacle that has been described, where she was made the common infamy, at which all mankind was summoned to point its finger.Questions:1. This part if from the novel , written by .2. Describe Hester ’s character briefly.’s theme and writing(20%)答案Write the names of the authors.(1*10=10%) 1. Mark Twain 2. Edgar Allan Poe 3. Ernest Hemingway 4. Ralph Waldo Emerson 5. Tennessee Williams 6. Robert Frost 7.Mark Twain8. Emily Dickinson 9. Walt Whitman10. Nathaniel Hawthorne..Blank Filling .(2*5=10%)1. The Old Man and the Sea2. Edgar Allan Poe3. Mark Twain4.“ the lost generation ” 5.Leaves of GrassⅢ. Multiple Choice. (2*15=30%)(1*15=10%)Passage 1Questions:1.This is the last stanza of a poem To Helen(1 分). Its writer is Edgar AllanPoe(1分).2.With whom is Helen associated in this stanza?(3分)Helen is Associatedwith psyche, Goddess of the soul in this stanza. (1分)By relating to psyche, Poe further conveys to readers the beauty of Helen and glory ofancient civilization. (2分)ment on the beauty of this poem.(5分)e beauty of form. (diction, rhymeand rhythm,rhetorical devices..)(3 分)The beauty of content. (2 分)Passage 2Questions:1.This part if from the novel The Scarlet Letter, (1分) written by NathanielHawthorne. (1分)2.Describe Hester’s character briefly. (8分) Eg: Courageous enough to face andconfess her sin, true to love, kind and generous to others…’s theme and writingTheme: (10分)∙grace under pressure (3分)∙Implication of this theme (3分)∙Embodiment of the heroes (2分)∙Examples (2分)Eg:Works of Hemingway, portraying as they do the dilemma of modern man utterly thrown upon himself for survival in an indifferent world, reveal man's impotence and his despairing courage to assert himself against overwhelming odds. To Hemingway, man's greatest achievement is to show grace under pressure, or what he described in The Sun Also Rises as holding the "purity of line through the maximum of exposure." “grace under pressure”is a repeated theme in his novels. For him, in a world which is crazy and meaningless, there is nothing one can do but to take care of himself and be tough against fate and tough with grace under pressure.His works have sometimes been read as an essentially negative commentary on a modern world filled with sterility, failure, and death. Yet such a nihilistic vision is repeatedly modified by Hemingway's affirmative assertion of the possibility of living with style and courage. His primary concern was an individual's "moment of truth," and his fascination with the threat of physical emotional, or psychic death is reflected in his lifelong preoccupation with stories of war (A Farewell to Arms, 1929, and For Whom the Bell Tolls, 1940), the bullfight (Death in the Afternoon, 1932), and the hunt (The Green Hills of Africa, 1935).Language: (10分)∙For his novels and for his short stories, which include some of the finest in the English language, Hemingway received wide acclaim. In 1954 he was awarded a Nobel Prize for his "mastery of the art of modern narration." (2 分)Taking his cue form Mark Twain's masterpiece, Hemingway brought thecolloquial style to near perfection in American literature. In Paris,Hemingway -- along with Gertrude Stein, Ezra Pound, T. S. Eliot, and James Joyce --accomplished a revolution in literary style and language. (2 分)He developed a spare, tight, reportorial prose based on simple sentencestructure and using a restricted vocabulary, precise imagery, and animpersonal, dramatic tone. (2 分)∙His language is characterized by features including: economy of expression, short sentences and paragraphs, vigorous and positive language, anddeliberate avoidance of gorgeous adjectives, and etc..(4分)。

六年级上册英语一课一练-Module1Family and friends Unit 3 Exercise3∣牛津上海版一起含解析

六年级上册英语一课一练-Module1Family and friends Unit 3 Exercise3∣牛津上海版一起含解析

牛津上海版(一起)2018-2019学年小学英语六年级上册Module 1 Family andfriends Unit 3 Exercise 3一、将下列短语翻译成英语1.将下列短语翻译成英语。

(1)参观城市花园________(2)一起吃晚饭________(3)一张我家庭的照片________(4)你和你的妹妹________(5)回来________(6)在星期六早晨________(7)乘公共汽车去________二、填写所缺单词2.Let's go ________ Ocean Park ________ Saturday afternoon.3.Tim is going to start ________ three thirty.4.—What do you often do ________ home?—I often play computer games.5.I sometimes share my lunch ________ my little brother.6.Shall we have a visit ________ the Summer Palace?三、选择最恰当的答案7.I have been to Green Market with ________.A. theyB. themC. themselvesD. their8.________ love eating ice cream in summer holidays.A. ChildB. ChildrenC. A childD. The child9.Let's not ________ TV now. You must do your homework first.A. watchB. watchingC. to watchD. watches10.Please take your family photo ________ us tomorrow.A. withB. forC. toD. with11.Shall we have a picnic ________ the weekend?A. toB. ofC. withD. at四、填入适当的单词,完成句子12.Here is a photo of my family. I am ________ in the middle. (stand)13.Eddie and I are ________ together near Seaside Town. We are very happy. (play)14.The Sunny Town ________ near Lucky Island. We often play there.15.My grandfather can ________ housework quickly. (do)16.We are having a ________ now. (party)17.The school library is far ________ from my Housing Estate.五、根据要求改写句子18.We have been to the Great Wall with them in Beijing. (改为一般疑问句)19.The boys like playing basketball. (改为否定句)20.I'd lik e to have tomato soup. (对划线部分提问)21.Alice and Kitty like to read books in the library. (对划线部分提问)22.We need pure water to drink every day. (改为一般疑问句)六、单词拼写23.根据首字母拼写单词,完成短文。

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第三章 存储系统1.设有一个具有20位地址和32位字长的存储器,问 (1) 该存储器能存储多少字节的信息?(2) 如果存储器由512K*8位SRAM 芯片组成,需要多少片? (3) 需要多少位地址作芯片选择? 解: (1)字节M 4832*220=(2)片84*28*51232*1024==K K(3) 只需1位地址作片选;2.已知某64位机主存采用半导体存储器,其地址码为26位,若使用256K*l6位的DRAM 芯片组成该机所允许的最大主存空间,并选用模块板结构形式,问; (1) 若每个模块板为1024K*64位,共需几个模块板? (2) 每个模块板内共有多少DRAM 芯片?(3) 主存共需多少DRAM 芯片? CPU 如何选择各模块板? 解:(1)个模块64264*264*262026==(2) 每个模块板共有1616*2*264*281020=片每个模块要16个DRAM 芯片(3) 主存共需64*16=1024个芯片,CPU 可用高6位地址经译码后作为模块板选择信号;3.用16K*8位的DRAM 芯片构成64K*32位存储器,要求: (1) 画出该存储器的组成逻辑框图。

(2) 设存储器读/写周期为0.5μS ,CPU 在1μS 内至少要访问一次。

试问采用哪种刷新方式比较合理?两次刷新的最大时间间隔是多少?对全部存储单元刷新一遍所需的实际刷新时间是多少?解:(1)根据题意,存储总容量为64KB ,故地址总线需16位。

现使用16K*8位DRAM 芯片,共需16片。

芯片本身地址线占14位,所以采用位并联与地址串联相结合的方法来组成整个存储器,其组成逻辑图如图所示,其中使用一片2:4译码器。

(2)根据已知条件,CPU 在1us 内至少访存一次,而整个存储器的平均读/写周期为0.5us ,如果采用集中刷新,有64us 的死时间,肯定不行 如果采用分散刷新,则每1us 只能访存一次,也不行 所以采用异步式刷新方式。

假定16K*1位的DRAM 芯片用128*128矩阵存储元构成,刷新时只对128行进行异步方式刷新,则刷新间隔为2ms/128 = 15.6us ,可取刷新信号周期15us 。

刷新一遍所用时间=15us ×128=1.92ms4.有一个1024K*32位的存储器,由128K*8位的DRAM 芯片构成。

问: (1) 总共需要多少DRAM 芯片? (2) 设计此存储体组成框图。

(3) 采用异步刷新方式,如单元刷新间隔不超过8ms ,则刷新信号周期是多少? 解:(1)片328*12832*1024 K K(2)CPU3:8译码器Y 1Y 2Y 3Y 4Y 5Y 6Y 7Y 8D 0-D 31A 0-A 16A 17-A 19(3)如果选择一个行地址进行刷新,刷新地址为A 0-A 8,因此这一行上的2048个存储元同时进行刷新,即在8ms 内进行512个周期。

刷新方式可采用:在8ms 中进行512次刷新操作的集中刷新方式,或按8ms/512 = 15.5us 刷新一次的异步刷新方式。

5.要求用256K*l6位SRAM 芯片设计1024K*32位的存储器。

SRAM 芯片有两个控制端:当CS 有效时,该片选中。

当W/R =1时执行读操作,当W/R=0时执行写操作。

2:4译码器 A 14 A 15CS 3 CS 2CS 0 CS 1 D 0~D 7 A 13~A 0解:所设计的存储器单元数为1M,字长为32,故地址长度为20位(A19~A0),所用芯片存储单元数为256K,字长为16位,故占用的地址长度为18位(A17~A0)。

由此可用位并联方式与地址串联方式相结合的方法组成组成整个存储器,共8片RAM芯片,并使用一片2:4译码器。

其存储器结构如图所示。

CPUY0Y1Y2Y3256k*16RW/RW/256k*16A19A183~C SC SC SC S1C S1C S2C S2C S3C S3C SD31-D16(高16位)D15-D(低16位)A17-A16 RW/6.用32K*8位的EPROM芯片组成128K*16位的只读存储器,试问:(1) 数据寄存器多少位?(2) 地址寄存器多少位?(3) 共需多少个EPROM芯片?(4) 画出此存储器组成框图。

解:(1)系统16位数据,所以数据寄存器16位(2)系统地址128K=217,所以地址寄存器17位(1)共需要8片(2)组成框图如下CPU地址寄存器数据寄存器32K*832K*832K*832K*832K*832K*832K*832K*8CS3CS2CS1CS02:4译码器CS0~CS3A16A157.某机器中,已知配有一个地址空间为0000H —3FFFH 的ROM 区域。

现在再用一个RAM 芯片(8K*8)形成40K*l6位的RAM 区域,起始地为6000H 。

假设RAM 芯片有CS 和WE 信号控制端。

CPU 的地址总线为A15—A0,数据总线为D15—D0,控制信号为R/W(读/写),MREQ(访存),要求: (1) 画出地址译码方案。

(2) 将ROM 与RAM 同CPU 连接。

解:(1)组内地址用A 12~A 0(2)小组译码器使用3:8译码器(3)RAM 1~RAM 5各用两片8K*8的芯片位并联连接CPUROMRAM 8K*8RAM 8K*8RAM 8K*8RAM 8K*8RAM 8K*8RAM 8K*8RAM 8K*8RAM 8K*8RAM 8K*8RAM 8K*83:8译码器A 13-A 15D 0-D 15A 0-A 128.设存储器容量为64M ,字长为64位,模块数m=8,分别用顺序和交叉方式进行组织。

存储周期T =lOOns ,数据总线宽度为64位,总线传送周期,τ=50ns 。

求:顺序存储器和交叉存储器的带宽各是多少?解:顺序存储器和交叉存储器连续读出m = 8个字的信息总量都是:q = 64位*8 = 512位顺序存储器和交叉存储器连续读出8个字所需的时间分别是:t 1 = mT = 8*100ns = 8*10-7snsns ns ns m T t 7210*5.445050*7100)1(-==+=-+=τROM 0000H RAM 1 RAM 2 RAM 3 RAM 4 RAM 5 6000H 8000H A000H C000H E000H 4000H顺序存储器和交叉存储器的带宽分别是:]/[1064)10*8(512/7711s t q W 位⨯=÷==-]/[108.113)10*5.4(512/7722s t q W 位⨯=÷==-9.CPU 执行一段程序时,cache 完成存取的次数为2420次,主存完成存取的次数为80次,已知cache 存储周期为40ns ,主存存储周期为240ns ,求cache /主存系统的效率和平均访问时间。

解:cache 的命中率968.08024202420=+=+=mc c N N N H640240===cm T T rcache/主存系统效率e 为%2.86%100*968.0*)61(61%100*)1(1=-+=-+=Hr r e平均访问时间T a 为 ns nsns e T T c a 4.46862.040===10.已知cache 存储周期40ns ,主存存储周期200ns ,cache /主存系统平均访问时间为50ns ,求cache 的命中率是多少?解:已知cache /主存系统平均访问时间ta=50ns ,而ta = h*tc+(1-h)*tm ;所以有 h*tc+tm-h*tm=50ns , (tc-tm)*h=50-tmh=(50-tm)/(tc-tm)=(50-200)/(40-200)=150/160=93.75%11.主存容量为4MB ,虚存容量为1GB ,则虚拟地址和物理地址各为多少位?如页面大小为4KB ,则页表长度是多少?解:主存容量为4MB ,则物理地址是22位,虚存容量为1GB ,则虚拟地址是30位如页面大小为4KB ,则页表长度是230/212=218=256K12.假设可供用户程序使用的主存容量为200KB ,而某用户的程序和数据所占的主存容量超过200KB ,但小于逻辑地址所表示的范围。

请问:具有虚存与不具有虚存对用户有何影响?答:没有虚存,则该程序不可能运行,因为在没有虚存的系统中要运行程序时必须将程序及其要处理的数据整体调入主存,而该程序和数据的容量超过了主存的实际容量。

在具有虚存的系统中,则该程序可正常运行,因为有了虚存技术,在运行程序时,系统不是将要运行程序及其要处理的数据整体调入主存,而是采用页式、段式或段页式,将要运行的程序逐页、逐段、或逐段逐页地从外存调入主存,这样即使程序大于实际的主存容量,也可以正常运行。

13.某计算机采用四体交叉存储器,今执行一段小循环程序,此程序放在存储器的连续地址单元中,假设每条指令的执行时间相等,而且不需要到存储器存取数据,请问在下面两种情况中(执行的指令数相等),程序运行的时间是否相等。

(1)循环程序由6条指令组成,重复执行80次。

(2)循环程序由8条指令组成,重复执行60次。

解:设取指周期为T ,总线传送周期为τ,指令执行时间为t 0 (1)t = (T+5τ+6t 0)*80 = 80T+400τ+480 t 0 (2) t = (T+7τ+8t 0)*60 = 60T+420τ+480 t 0 故不相等。

14.假设主存只有a ,b ,c 三个页框,组成a 进b 出的FIFO 队列,进程访问页面的序列是0,l ,2,4,2,3,0,2,1,3,2号。

用列表法求采用LRU 替换策略时的命中串。

解:页面访问序列 0124232132命中率 a 0 1 2 4 2 3 0 2 1 3 2 3/11 =27.3% b 0 1 2 423 021 3c11 4 23 0 21命中命中命中15.从下列有关存储器的描述中,选择出正确的答案: A .多体交叉存储主要解决扩充容量问题。

B .访问存储器的请求是由CPU 发出的。

C .cache 与主存统一编址,即主存空间的某一部分属于cache 。

D .cache 的功能全由硬件实现。

答:D 。

16.从下列有关存储器的描述中,选择出正确的答案:A .在虚拟存储器中,外存和主存以相同的方式工作,因此允许程序员用比主存空间大得多的外存空间编程。

B .在虚拟存储拟器中,逻辑地址转换成物理地址由硬件实现的,仅在页面失效时才由操作系统将被访问页面从外存调到内存,必要时还要先把被淘汰的页面内容写入外存。

C .存储保护的目的是:在多用户环境中,既要防止一个用户程序出错而破坏系统软件或其他用户程序,又要防止一个用户访问不是分配给他的主存区,以达到数据安全和保密的要求。

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