exercise3
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
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
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)
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
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
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
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
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
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
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______________.。
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
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。