2000年9月全国计算机等级考试四级笔试试题

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2000年大学英语四级真题

2000年全国英语专业四级考试试题英美者英语专业网站来源:英美者英语专业网站作者:全国英语专业四级八级考试委员会[编辑]导言:2000年全国英语专业四级考试试题Part ⅠWRITING ［45 MIN.］SECTION A COMPOSITIONWrite on ANSWER SHEET ONE a composition of about 150 words on the following topic: College life should be varied and colourful. And extracurricular activities are an important aspect of it. However, at present, there is much room for improveme nt in this regard. Write an article to the university radio entitled:The Importance of Extracurricular ActivitiesIn the first part of your article you should clearly present yourview, and in t he second part you should support your opinion with appropriate details. In the last part you should bring what you have written to a natural conclusion or summ ary.Marks will be awarded for content, organization, grammar and appropriacy. Failur e to follow the above instructions may result in a loss of marks.SECTION B NOTE-WRITING［10 MIN.］Write on ANSWER SHEET ONE a note of about 50-60 words based on the following situation:You’ve read on the notice board that the university library is looking for a par t-time library assistant who can work at weekends. You think that your classmate , George, is a suitable person for this vacancy. Write him a note, telling him w hat you know about the vacancy and trying to persuade him to go for an interview Marks will be awarded for content organization, grammar and appropriacy.Part ⅡDICTATION ［15 MIN.］Listen to the following passage. Altogether the passage will be read to you four times. During the first reading, which will be read at normal speed, listen and try to understand the meaning. For thesecond and third readings, the passage w ill be read sentence by sentence, or phrase by phrase, with intervals of 15 seco nds. The last reading will be read at normal speed again and during this time yo u should check your work. You will then be given 2 minutes to check through your work once more. Please write the whole passage on ANSWER SHEET TWOPart ⅢLISTENING COMPREHENSION ［20 MIN.］ In Sections A, B, and C you will hear everything ONCE ONLY. Listen carefully an d then answer the questions that follow. Mark the best answer to each question o n your answer sheet.Section A STATEMENTIn this section you will hear nine statements. At the end of the statement you w ill be given 10 seconds to answer each of the following nine questions. 1. What is said about Harry’s brother?A. He is happy with his job.B. He is a very ambitious man.C. He is too ambitious to be an engine driver.D. He doesn’t like to be an engine driver.2. What do you learn about Ms. Ellis?A. She has been waiting.B. She is examining her patient.C. She is seeing her doctor.D. She wouldn’t mind waiting.3. Joan is probably a___.A. nurseB. doctorC. lawyerD. saleswoman4. The speaker sees Mary wear ___ different silk scarves in a wee k.A. 2B.5C.7D. 65. Where will the passengers change trains to go to Gilford?A. East Croydon.B.Victoria.C. Southeast.D.Red Hill.6. What is the speaker probably doing?A. Interviewing a clerk.B. Writing a job ad.C. Dismissing a clerk.D. Making inquires7. What does the speaker mean?A. Emily is neither honest nor trustworthy.B. Emily used to be honest only.C. Emily used to be trustworthy only.D. Emily is more than honest and trustworthy.8. When does the next train leave?A. 6:56.B. 7:00.C.7:28.D.8:38.9. What was wrong with Malcolm?A. He had trouble working hard.B. He didn’t know where to go.C. He never went anywhere.D. He worked hard but never succeeded.SECTION B CONVERSATIONIn this section, you will hear eight short conversations between two speakers. A t the end of each conversation you will be given 10 seconds to answer each of th e following eight questions.10. What’s the probable relationship between the two speakers?A. Teacher and student.B. Doctor and patient.C. Lawyer and client.D. Boss and secretary.11. What is the weather usually like in November?A. Hotter than the present weather.B. More humid than the present weather.C. Drier than the present weather.D. Cooler than the present weather.12. What conclusion can we draw from this conversation?A. Public buses are fast and cheap.B. Parking is becoming a big problem.C. Subway trains are even safer than taxis.D. Taxis are more convenient than buses.13. What are the two speakers talking about?A. Fixing the woman’s computer.B. Ordering some new parts by Friday.C. Getting the new parts ready by Friday.D. Sending the woman’s computer for repair.14. What can we learn from the conversation?A. Neither of them has a favourable opinion of the service.B. The woman is having a terrible time serving in the restaurant.C. Both agree it’s time for the restaurant to fire some staff.D. The man thinks the restaurant is all right, but the woman doesn’t.15. Who will pay for the call?A. The man.B. The operator.C. The man’s sister.D. The man and his sister.16. What does the man think of the woman’s choice of clothing?A. He thinks her choice is good.B. He thinks her choice is terrible.C. He doesn’t like the colour.D. He doesn’t like the style.17. What happened to Mr. Runt’s project?A. It was fairly successful.B. It was hard and futile.C. It failed for lack of fund.D. It stopped for lack of land.SECTION C NEWS BROADCASTQuestion 18 is based on the following news. At the end of the news item, you wil l be given 1O seconds to answer the question.Now listen to the news.18. According to the news, NATO and Russia___.A. have finalized a charter on their new relationshipB. still have differences in military and political issuesC. will hold a fifth round of talks in LuxembourgD. made no progress in this round of talksQuestions 19 and 20 are based on the following news. At the end of the news item , you will be given 20 seconds to answer the two questions.Now listen to the news.19. ___ people were killed during the air crash.A. 61B. 51C. 41D.1020. According to the news, the plane crashed___.A. shortly before it landedB. minutes after it took offC. after it cleared the mountainsD. at the foot of the mountainsQuestions 21 and 22 are based on the following news. At the end of the news item , you will be given 20 seconds to answer the two questions.Now listen to the news.21. Which of the following is NOT listed as a terrorist group by the US ?A. The pro-Iranian Hezbollah.B. The Palestinian group Hamas.C. The Irish Republican Army.D. The Basque separatist group ETA.22. The affected groups will be prevented from___.A. entering the United States legallyB. freezing US financial assets abroadC. receiving support from other countriesD. giving weapons to other terrorist groupsQuestion 23 is based on the following news. At the end of the news item, you wil l be given 1O seconds to answer the question.Now listen to the news.23. Israeli Prime Minister Benjamin Netanyahu___.A. has been prosecuted by the Justice MinistryB. may be prosecuted by the Justice MinistryC. has been prosecuted by the policeD. will be prosecuted on MondayQuestions 24 and 25 are based on the following news. At the end of the news item , you will be given 20 seconds to answer the two questions.Now listen to the news.24. The winners of the reported elections are___.A. the left-wing ConservativesB. the left-wing SocialistsC. the centre-right ConservativesD. the centre-right Socialists25. If the left secures the parliamentary majority,___.A. Chirac will share his presidential power with JospinB. Jospin will share his prime ministerial power with ChiracC. Jospin will become prime minister, and Chirac will remainD. Jospin will become prime minister, and Chirac will resign完型填空Part ⅣCLOZE ［15 MIN.］Decide which of the choices given below would best complete the passage if inserted in the corresponding blanks. Mark the best choice for each blank on your answer sheet.The difference between a liquid and a gas is obvious ( 26 ) the conditions of temperature and pressure commonly found at the sur face of the Earth. A liquid can be kept in an open container and ( 27 ) it to the level of a free surface. A gas forms no free surface but ( 28 ) to diffuse throughout the space available; it must ( 29 ) be kept in a closed container, as ( 30 ) aplanet’s atmosphere. The distinction was a prominent feature of early theories ( 31 )the phases of matter. In the nineteenth century, for example, one theory maintained that a liquid could be “dissolved”in a vapor without losing its identity, and another theory held that the two phases are ( 32 ) different kinds o f molecules(分子). The theories now prevailing ( 33 ) a quit e different approach by emphasizing what liquids and gases have in common. They are both forms of matter that have no permanent structure, and they both flow ea sily. They are fluids.The ( 34 ) similarly of liquids and gases becomes clear ly apparent when the temperature and pressure are raised somewhat. ( 35 ) a closed container partially filled with a liquid is heated. The li quid expands or ( 36 ) , becomes less dense; some of it evapor ates. ( 37 ) , the vapor above the liquid surface becomes dense r as the evaporated molecules are added to it. The combination of temperature an d pressure ( 38 ) the densities become equal is ( 3 9 ) the critical point. Above the critical point the liquid and the gas can no longer be ( 40 ) ; there is a single, undifferentiated fluid phase of uniform density.26. A. in B. on C. under D. beyond27. A. fills B. be filled C. filling D. to fill28. A. intends B. tends C. inclines D. contends29. A. however B. nevertheless C. so D. therefore30． A. in the event of B. in the case of C. with a view to D. with reference to31. A. having described B. described C. describing D. to have described32. A. made up of B. consisted of C. constituted of D. made from33. A. apply B. adapt C. take D. conduct34. A. elementary B. crucial C. rudimentaryD. fundamental35. A. Suppose B. To suppose C. Being supposed D. Supposed36. A. in a word B. in the meantime C. in other words D. in that case37. A. Similarly B. In contrast C. Furthermore D. Instead38. A. on that B. on which C. at that D. at which39. A. known B. defined C. called D. referred to40. A. classified B. recognized C. categorized D. distinguished转自[英美者]-英语专业网站：/cn/Html/TEM/Test4/7393488198093.html2000年全国英语专业四级考试试题Part ⅤGRAMMAR AND VOCABULARY ［15 MIN.］There are twenty-five sentences in this section. Beneath each sentence there are four words or phrases marked A, B, C and D. Choose one word or phrase that best completes the sentence. Mark your answers on your answer sheet.41. Acute hearing helps most animals sense the approach of thunderstorm s long before people___.A. doB. hearC. do themD. hearing it42. This is an illness that can result in total blindness ___ left u ntreated.A. afterB. ifC. sinceD.unless43. The central provinces have floods in some years, and ___.A. drought in othersB. droughts are othersC. while other droughtsD. others in drought44. Do help yourself to some fruit,___ you?A. can’tB. don’tC. wouldn’tD. won’t45. There___ nothing more for discussion, the meeting came to an e nd half an hour earlier.A. to beB. to have beenC. beingD.be46. My mother can’t get ___ because she has rheumatism (风湿病).A. aboutB.onC. throughD. in47. I was very much put ___ by Mark’s rude behavior; it really annoy ed me.A.overB.offC.upD.by48. You ___ Jim anything about it. It was none of his business.A. needn’t have toldB. needn’t tellC. mustn’t have toldD. mustn’t tell49. All of us would have enjoyed the party much more if there___ q uite such a crowd of people there.A. weren’tB. hasn’t beenC. hadn’t beenD.w ouldn’t be50. Firms that use computers have found that the number of staff ___ quality control can be substantially reduced.A.whoseB.asC.whatD.that51. ___ at in this way, the present economic situation doesn’t seem so gloomy.A. LookingB. LookedC. Having lookedD. To look52. Many people are ___ to insect bites, and some even have to go to hospital.A. insensitiveB. allergicC. sensibleD. infected53. When you’re driving on a motorway, you must obey the signs telling you to get into the right ___.A.wayB.trackC.roadne54. The motorist had to ___to avoid knocking the old woman down in the middle of the road.A. swerveB. twistC. departD. swing55. In winter drivers have trouble stopping their cars from ___ on icy roads.A. skatingB. skiddingC. slidingD. slipping56. This project would ___ a huge increase in defense spending.A. resultB. assureC. entailD. accomplish57. The chances of a repetition of these unfortunate events are ___ indeed.A. distantB. slimC. unlikelyD. narrow58. We should make a clear ___ between ’competent’and ’proficient’for the purposes of our discussion.A. separationB. divisionC. distinctionD. diffe rence59. In the present economic ___ we can make even greater progress than previously.A. airB. moodC. areaD. climate60. Rite of Passage is a good novel by any standards;___, it shoul d rank high on any list of science fiction.A. consistentlyB. consequentlyC. invariablyD. fortunately61. The diversity of tropical plants in the region represents a seeming ly___ source of raw materials, of which only a few have been utilized.A. exploitedB. controversialC. inexhaustibleD.remarkable62. While he was in Beijing, he spent all his time ___ some import ant museums and buildings.A. visitingB. travelingC. watchingD. touring63. You must let me have the annual report without ___ by ten o’cl ock tomorrow morning.A. failureB. hesitationC. troubleD. fail64. As the director can’t come to the reception, I’m representing the c ompanyA. on his accountB. on his behalfC. for his partD. in his interest65. Dreams are___ in themselves, but when combined with other data, they can tell us much about the dreamer.A. uninformativeB. startlingC.harmless D. uncontrollable阅读理解APart ⅥREADING COMPREHENSION ［30 MIN.］ SECTION A READING COMPREHENSION［25 MIN.］In this section there are four passages followed by questions or unfinished stat ements, each with four suggested answers marked A, B, C and D. Choose the one th at you think is the best answer. Mark your answers on your answer sheet.TEXT AClearly if we are to participate in the society in which we live we must communi cate with other people. A great deal of communicating is performed on a person-t o-person basis by the simple means of speech. If we travel in buses, buy things in shops, or eat in restaurants, we are likely to have conversations where we gi ve information or opinions, receive news or comment, and very likely have our vi ews challenged by other members of society.Face-to-face contact is by no means the only form of communication and during th e last two hundred years the art of mass communication has become one of the dom inating factors of contemporary society. Two things, above others, have caused t he enormous growth of the communication industry. Firstly, inventiveness has led to advances in printing, telecommunications, photography, radio and television. secondly, speed has revolutionised the transmission and reception of communicat ions so that local news often takes a back seat to national news, which itself i s often almost eclipsed by international news.No longer is the possession of information confined to a privileged minority. In the last century the wealthy man with his own library was indeed fortunate, but today there are public libraries. Forty years ago people used to flock to the c inema, but now far more people sit at home and turn on the TV to watch a program me that is being channelled into millions of homes. Communication is no longer merely concerned with the transmission of information . The modem communication industry influences the way people live in society and broadens their horizons by allowing access to information, education and entert ainment. The printing,broadcasting and advertising industries are all involved with informing, educating and entertaining.Although a great deal of the material communicated by the mass media is very val uable to the individual and to the society of which he is a part, the vast modem network of communications is open to abuse. However, the mass media are with us for better, for worse, and there is no turning back.66. In the first paragraph the writer emphasizes the___ of face-t o-face contact in social settings.A. natureB. limitationC. usefulnessD. creativity67. It is implied in the passage that___.A. local news used to be the only source of information.B. local news still takes a significant place.C. national news is becoming more popular.D. international news is the fastest transmitted news.68. Which of the following statements is INCORRECT?A. To possess information used to be a privilege.B. Public libraries have replaced private libraries.C. Communication means more than transmission.D. Information influences ways of life and thinking.69. From the last paragraph we can infer that the writer is___.A. indifferent to the harmful influence of the mass mediaB. happy about the drastic changes in the mass mediaC. pessimistic about the future of the mass mediaD. concerned about the wrong use of the mass mediaTEXT BThe men and women of Anglo-Saxon England normally bore one name only. Distinguis hing epithets were rarely added. These might be patronymic, descriptive or occup ational. They were, however, hardly surnames. Heritable names gradually became g eneral in the three centuries following the Norman Conquest in 1066. It was not until the 13th and 14th centuries that surnames became fixed, although for many years after that, the degree of stability in family names varied considerably in different parts of the country.British surnames fall mainly into four broad categories: patronymic,occupationa l, descriptive and local. A few names, it is true, will remain puzzling: foreign names, perhaps, crudely translated, adapted or abbreviated; or artificial names . In fact, over fifty per cent of genuine British surnames derive from place names of different kinds, and so they belong to the last of our four main categories. Even such a name as Simpson may belong to this last group, and not to the first , had the family once had its home in the ancient village of that name. Otherwis e, Simpson means “the son of Simon”, as might be expected.Hundreds of occupational surnames are at once familiar to us, or at least r ecognisable after a little thought: Archer, Carter, Fisher, Mason, Thatcher, Tay lor, to name but a few. Hundreds of others are more obscure in their meanings an d testify to the amazing specialisation in medieval arts, crafts and functions. Such are “Day”, (Old English for breadmaker) and “Walker”(a fuller whose job it was to clean and thicken newly made cloth).All these vocational names carry with them a certain gravity and dignity, w hich descriptive names often lack. Some, it is true, like “Long”, “Short” or “Li ttle”, are simple. They may be taken quite literally. Others require more thinki ng: their meanings areslightly different from the modem ones. “Black”and “White ”implied dark and fair respectively. “Sharp”meant genuinely discerning, alert, acute rather than quick-witted or clever. Place-names have a lasting interest since there is hardly a town or village in a ll England that has not at some time given its name to a family. They may be pic turesque, even poetical; or they may be pedestrian, even trivial. Among the comm oner names which survive with relatively little change from old-English times ar e “Milton”(middle enclosure) and “Hilton”(enclosure on a hill).70. Surnames are said to be ___ in Anglo-Saxon England.A. commonB. vocationalC. unusualD. descriptiv e71. We learn from the first paragraph ___ for many years after the 13th and 14th centuries.A. family names became descriptive and occupationalB. people in some areas still had no surnamesC. some people kept changing their surnamesD. all family names became fixed in England72. “Patronymic”in the second paragraph is closest in meaning to“forme d from ___.A. the name of one’s father”B. the family occupation”C. one’s family home”D. one’s family history”73. Which of the following sentences is an opinion rather than a fact?A. hundreds of occupational names are at once familiar to us.B. “Black”and “White”implied “dark”and “fair”respectively.C. V ocational names carry with them a certain gravity and dignity.D. Every place in England has given its name to a family. TEXT CSince the early 1930s, Swiss banks had prided themselves on their system of banking secrecy and numbered accounts. Over the years, they had successfully w ithstood every challenge to this system by their own government who, in turn, ha d been frequently urged by foreign governments to reveal information about the f inancial affairs to certain account holders. The result of this policy of secre cy was that a kind of mystique had grown up around Swissbanking. There was a w idely-held belief that Switzerland was irresistible to wealthy foreigners, mainl y because of its numbered accounts and bankers’ reluctance to ask awkward questi ons of depositors. Contributing to the mystique was the view, carefully propagat ed by the banks themselves, that if this secrecy was ever given up, foreigners w ould fall over themselves in the rush to withdraw money, and the Swiss banking s ystem would virtually collapse overnight.To many, therefore, it came like a bolt out of the blue, when, in 1977, the Swiss banks announced they had signed a pact with the Swiss National Bank (the Central Bank). The aim of the agreement was to prevent to improper use of the c ountry’s ban k secrecy laws, and its effect was to curb severely the system of se crecy.The rules which the banks had agreed to observe made the opening of numbere d accounts subject to much closer scrutiny than before. The banks would be requ ired, if necessary, to identify the origin of foreign funds going into numbered and other accounts. The idea was to stop such accounts being used for dubious p urposes. Also they agreed not to accept funds resulting from tax evasion or from crime.The pact represented essentially a tightening up of banking rules. Although the banks agreed to end relations with clients whose identities were unclear or who were performing improper acts, they were still not obliged to inform on a client to anyone, including the Swiss government. To some extent, therefore, the princ iple of secrecy had been maintained.74. Swiss banks took pride in___.A. the number of their accountsB. withholding client informationC. being mysterious to the outsidersD. attracting wealthy foreign clients75. According to the passage, the widely-held belief that Switzerland w as irresistible to wealthy foreigners was ___ by banks themselves.A. deniedB. criticizedC. reviewedD. defended76. In the last paragraph, the writer thinks that___.A. complete changes had been introduced into Swiss banksB. Swiss banks could no longer keep client informationC. changes in the bank policies had been somewhat superficialD. more changes need to be considered and madeTEXT DCoketown was a town of red brick, or of brick that would have been red if the sm oke and the ashes had allowed it; but as matters stood it was a town of unnatura l red and black like the painted face of a savage. It was a town of machinery an d tall chimneys, out of which smoke trailed themselves for ever and ever. It had a black canal in it, and a river that ran purple with ill-smelling dye, and vas t piles of buildings full of windows where there was a rattling and a trembling all day long, and where the piston of the steam-engine worked monotonously up an d down like the head of an elephant in a state of madness. The town contained se veral large streets all very like one another, and many small streets still more like one another, inhabited by people equally like one another.A sunny midsummer day. There was such a thing sometimes, even in Coketown. Seen from a distance in such weather, Coketownlay covered in a haze of its own. You only knew the town was there, because you knew there could have been no such blo tch upon the view without a town.The streets were hot and dusty on the summer day, and the sun was so bright that it even shone through the haze over Coketown, and could not be looked at steadi ly. Workers emerged from low underground doorways into factory yards, and sat on posts and steps, wiping their faces and contemplating coals. The whole town see med to be frying in oil. There was a stifling smell of hot oil everywhere. The a tmosphere of those places was like the breath of hell, and their inhabitants was ting with heat, toiled languidly in the desert. But no temperature made the mad elephants more mad or more sane. Their wearisome heads went up and down at the s ame rate, in hot weather and in cold, wet weather and dry fair weather and foul. The measured motion of their shadows on the walls, was the substitute Coketown had to show for the shadows of rustling woods; while for the summer hum of insec ts, it could offer all the year round, from the dawn of Monday to the night of S aturday, the whirr of shafts and wheels.77. Which of the following adjectives is NOT appropriate todescribe Co ketown?A. dullB. dirtyC. noisyD. savage78. From the passage we know that Coketown was mainly a(n) ___town .A. industrialB. agriculturalC. residentialD. commercial79. Only ___ were not affected by weather.转自[英美者]-英语专业网站：/cn/Html/TEM/Test4/7393488198093_2.ht ml2000年全国英语专业四级考试试题A. the workmenB. the inhabitantsC. the steam-enginesD. the rustling woods80. Which is the author’s opinion of Coketown?A. Coketown should be replaced by woods.B. The town was seriously polluted.C. The town had too much oil in it.D. The town’s atmosphere was traditional.BSECTION B SKIMMING AND SCANNINGIn this section there are seven passages with a total often multiple-choice ques tions. Skim or scan them as required and then mark your answers on your answer s heet.TEXT EFirst read the following question.81. The writer is concerned about___.A. budget housekeepingB. the retail tradeC. computer skillsD. mental arithmeticNow read Text E quickly and mark your answer on your answer sheet.A lot of attention is being given to children who leave school unable to read or write. I think there should be equal concern for those who are unable to cope w ith simple mental arithmetic -particularly girls. It is often stated that today’s children are growing up in a computer world and they don’t need the same skills that their grandparents did. But is it any wonde r that many young girls trying to cope with budget housekeeping fail for the sim ple reason they cannot keep accurate checks on their purchases? Shopping in markets is no source of cheap purchasing unless one is able to keep pace with the apparent mental agility of the vendor. Must we face the thought that at some time in the distant future everyone will n eed to carry in their handbag or pocket one of the miniature calculators?TEXT FFirst read the following question.82. This is a letter of___.A. referenceB. applicationC. inquiryD. complaint。

计算机四级考试试题含答案3篇

计算机四级考试试题含答案第一篇：听力部分一、听力理解Passage 11. A) He wasted a lot of time on the Internet.2. B) He had to work harder to make up for the lost time.3. C) He found it easier to manage his time after the incident.Passage 24. A) Children’s entertainment.5. B) A new type of TV program.6. D) It helps children learn without realizing it.Passage 37. A) His experience as a gardener.8. C) The latest methods of gardening.9. B) Making full use of available space for gardening.Passage 410. D) They have difficulty expressing themselves in a foreign language.11. B) They may show their true personality more in a foreign language.12. C) They have a hard time understanding the humor in a foreign language.二、听力填空Section A: Directions: In this section, you will hear 10 short conversations. At the end of each conversation, a question will be asked about what was said. Both the conversation and the question will be spoken only once. After each question there will be a pause. During the pause, you must read the fourchoices marked A), B), C) and D), and decide which is the best answer. Then mark the corresponding letter on the Answer Sheet with a single line through the center.1. type of shirt she wants2. He has to leave very early in the morning.3. The woman’s plan to study in the library.4. The woman has been admitted to the university.5. Jenny has to buy more books than she expected.6. Buy a bigger bag.7. The fact that the train is late.8. She will return the book to the library.9. He is going to buy a new bike soon.10. He is going to go to the stadium later this afternoon.Section B: Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear aquestion, you must choose the best answer from thefour choices marked A), B), C) and D). Then mark the corresponding letter on the Answer Sheet with a single line through the center.11. Why do people who exercise have better vision?12. What should you do if you want to prevent the loss of vision?13. What kind of food is rich in vitamin A?14. Why is working in dim light bad for your eyes?15. How does lack of sleep affect your vision?三、听力短文Passage One16. C) Take more public transportation.17. A) Reduce pollution.18. B) Provide more job opportunities.Passage Two19. B) Help improve their life skills.20. C) Teach them how to deal with emergencies.21. A) To eliminate surprises that could be dangerous.Passage Three22. C) They produce extra food for emergencies.23. B) They are a symbol of health and prosperity.24. D) They are a source of innovation.Passage Four25. B) Furniture made of recycled materials.26. C) Chemicals that can be hazardous to yourhealth.27. A) How to avoid the risks of indoor pollution.第二篇：阅读部分一、阅读选词填空1. J) set2. A) maximize3. D) demonstrate4. N) exposure5. I) alternative6. K) establish7. H) constitute8. G) grade9. B) survival10. F) clarify11. M) acquisition12. E) restrict13. L) skeptical二、完形填空1. C) interrupted2. D) bored3. A) expensive4. A) not really5. B) surprising6. D) refuse7. C) occasionally8. A) similarly9. D) unless10. C) history11. A) adopt12. B) creative13. C) alternatively14. D) lack15. C) explores三、阅读理解Passage one:1. A) By increasing taxes on sugary drinks.2. D) It is becoming more difficult to find too much sugar in food.3. B) Some of the polls conducted by the government had poor methods.4. C) The government encourages food companies to reduce sugar in their products.5. D) Britain’s sugar reduction program is currently far from achieving its goal.Passage two:6. D) How humans learn from music.7. D) It provokes our feelings and curiosity.8. C) They share a lot of similarities with child conversations.9. B) To raise our interest in the topic.10. C) By dividing it into smaller, easier-to-understand parts.Passage three:11. A) They were unaware of security threats.12. B) Problems with the security clearance process.13. C) They pose potential security risks.14. D) Attackers could take control of engines and other vital systems.15. B) A lack of awareness of cybersecurity risks among users.第三篇：写作部分一、作文Dear Mr. Smith,I am writing to express my strong objection tothe recent decision to cancel school sports programs in our district. While I understand that budget cuts may be challenging, I believe that cutting sports programs is not the best solution. As a student-athlete, I have experienced firsthand the manybenefits that sports programs bring to our schools.Firstly, sports programs encourage students to be physically active and lead healthy lifestyles. With childhood obesity rates on the rise, it is important to promote healthy habits in our schools. Furthermore, participation in sports can improve students’ mental and emotional well-being, as well as their academic performance.Secondly, sports programs provide students with valuable life skills. Learning to work together as a team and to persevere through challenges are importantskills that will serve students well in their future careers and personal lives. Sports also teach students important values such as sportsmanship, fair play and respect for others.Finally, sports programs are a source of pridefor our schools and communities. They provide opportunities for students to represent their schools on a local, regional or even national level and can help to build community spirit and support.In conclusion, I strongly urge you to reconsider the decision to cancel school sports programs. The benefits of these programs are far too important to ignore. Thank you for taking the time to consider my concerns.Yours sincerely,[Your Name]二、翻译1. 我的爷爷是个非常有趣的人。

2000专四真题参考答案

参考答案：PART ⅠWRITINGSECTION A［参考范文］The Importance of Extracurricular ActivitiesDear Editor,People have different ideas about how students should spend their school days. Some believe that students should spend the whole day on academic studies. Others believe that extracurricular activities should be a required part of every school day. I think both ways have their advantages. But I prefer the latter.As a student, our main task is to concentrate on our academic study. We have to attend classes, reading books and doing assignments. Only by working hard can we learn our courses well. But I don’t think we should spend every hour and minute on academic study. A proverb says, “All work and no play makes Jack a dull boy.” Without good health and strong body, how can we improve our study efficiency and make great achievements in our academic study? Besides, spending the whole day on academic study may make us exhausted and weak. We should find other meaningful things to do besides studying. For example, doing extracurricular activities can make students’ life more colorful and beneficial. There are various forms of exercise. My favorite one is football. I play football with my classmates for one hour every afternoon. After a day’s hard work, how nice it is to stretch my arms and legs! By playing football I’ve got both joy and strength. I always looken ergetic.Actually doing extracurricular activities doesn’t disturb our study if we make full use of our time. Instead it does help us study more efficiently. We can be good at learning as well as extracurricular activities. So I suggest that students do extracurricular activities along with their academic studies.SECTION B［参考范文］Dear George,I have read on the notice board that the university is looking for a part-time library assistance who can work at weekends. I think you are the suitable person for this vacancy, for you are free at weekends and it pays well, yet the job is not difficult. It is also a good chance to improve yourself. So you shouldgo for an interview.Yours完型填空短文大意：这篇文章介绍了气体与液体的特性及相关理论。

计算机四级证书试题及答案

计算机四级证书试题及答案（正文）第一部分：听力理解Section A（20 points）1. A) The woman doesn't have a flashlight.B) The man forgot to take his flashlight.C) There is no flashlight in the man's bag.D) The man can lend his flashlight to the woman.2. A) He agrees with the woman's statement.B) He disagrees with the woman's statement.C) He suggests finding a new place to live.D) He doesn't mind the noise from the street.3. A) The man was invited to the party.B) The man's friend had a birthday recently.C) The man has already bought a present.D) The man is planning to celebrate his birthday.4. A) They should not have waited for the bus.B) The bus will arrive later than scheduled.C) They will take the next bus together.D) The bus they wanted to take is very crowded.5. A) He often helps the woman with her work.B) He is too busy to attend the meeting.C) He doesn't feel like going to the meeting.D) He will just listen instead of taking part.Section B（10 points）6. So far, the computer program is functioning ______.7. The company has decided to implement a new ______ system.8. Consumer demand for their products has ______ over the past year.9. This software offers a range of features to ______ all your needs.10. The manager called a meeting to ______ the current situation.Section C（10 points）11. What is the lecture mainly about?12. What will students be able to do with the lab?13. What does the professor say about the lab assistant?14. What is the main problem with the lab schedule?15. What does the professor suggest students do if they want to use the lab?Section D（10 points）16. The word "technology" comes from the Greek word _____.17. Early computers were mainly used for ______ purposes.18. The first computer program was written by ______.19. ______ computers are typically large and expensive.20. What is the passage mainly discussing?（附加答案）1-5 DBCAD 6-10 well; management; increased; meet; assess 11-15 CACAC 16-20 technologia; military; Ada Lovelace; Analog; The history and development of computers（正文结束）。

计算机操作员四级考试题(附参考答案)

计算机操作员四级考试题（附参考答案）一、单选题（共65题，每题1分，共65分）1.PC机数据总线信号的状态是（）。

A、单向双态B、单向三态C、双向双态D、双向三态正确答案：D2.计算机病毒破坏的主要对象是（）。

A、CPUB、磁盘驱动器C、程序和数据D、磁盘片正确答案：C3.如要关闭工作簿，但不想退出Excel，可以单击（）。

A、“窗口”下拉菜单中的“隐藏”命令B、“文件”下拉菜单中的“关闭”命令C、“文件”下拉菜单中的“退出”命令D、关闭Excel窗口的按钮×正确答案：B4.Powerpoint2010制作的演示文稿文件扩展名是（）。

A、.pptxB、.xlsC、.docD、.fpt正确答案：A5.下列设备中，密封性最好的是（）。

A、电源B、光驱C、机箱D、硬盘正确答案：D6.在立式机长中，个人计算机的电源一般安装在（）。

A、中部B、顶部C、底部D、任意位置正确答案：B7.Linux系统中网络连接测试命令是（）。

A、pingB、nettestC、iprouteD、route正确答案：A8.在因特网中，地址解析协议ARP是用来解析（）。

A、IP地址与MAC地址的对应关系B、MAC地址与端口号的对应关系C、IP地址与端口号的对应关系D、端口号与主机名的对应关系正确答案：A9.有关WinRAR软件说法错误的是（）。

A、WinRAR默认的压缩格式是RAR，它的压缩率比ZIP格式高出10%~30%B、WinRAR可以为压缩文件制作自解压文件C、WinRAR不支持ZIP类型的压缩文件D、WinRAR可以制作带密码的压缩文件正确答案：C10.Powerpoint2010提供的幻灯片模板，主要是解决幻灯片的（）。

A、文字格式B、文字颜色C、背景图案D、以上全是正确答案：D11.如果在A1、B1和C1三个单元格分别输入数据1、2和3，再选择单元格D4，然后单击常用工具栏中的按钮“∑”，则在单元格D1显示（）。

计算机四级考试试题含答案

计算机四级考试试题含答案一、听力部分1.听力理解1.1 短对话1. A. 家里太吵了，影响学习。

B. 我每天都去图书馆学习，想要尝试一下吗？A. 好的，那我们什么时候去？B. 最好是周末，这样时间比较宽裕。

Q: 周末他们想去哪里？A: 图书馆1.2 长对话2. A. 我在网上看到一个新款电子产品，非常不错，价格也很实惠。

B. 那我们去商场看看，实物跟网上一定有些不同。

A. 我查了一下，最便宜的商家在那个商场的三楼。

B. 所以你已经知道去哪个商场了？Q: 他们为什么要去商场？A: 去看电子产品1.3 长对话3. A. 你怎么那么熟练地使用电脑？B. 我是参加过一些计算机课程的，技术还是有一定水平的。

A. 你学习的哪些课程对你帮助最大？B. 最有帮助的是网络编程课程，它让我对计算机有了更深入的理解。

Q: 对B最有帮助的是哪个课程？A: 网络编程课程2.长篇听力2.1 短文听力4. 银行「金融家」们正在研究一种全球性的金融卡，它将可替代现有的信用卡和ATM卡。

金融卡将通过互联网版的电子商务进行支付和交易。

这种卡还将提供一种安全的电子方式，以便进行身份鉴别，这种技术已在医院身份鉴别等领域得到了应用。

Q: 金融卡能够替代哪两种卡？A: 信用卡和ATM卡2.2 短文听力5. 现在，许多任意信息被公开发布在网上，但只有少数人真正理解其中的意义。

信息丰富的世界并没有给人们的决策带来便利，相反，它令人们更加困惑。

因此，以责任为导向的新闻和应酬能够帮助大众理解所收集到的信息。

Q: 信息丰富的世界为什么令人们更加困惑？A: 信息过多，令人们难以作出决策。

二、阅读部分1.词汇选项6. Google著名的Web日历已经成为一个用户量极大的计划和时间管理工具。

这个日历最初只是为了在Google用户之间共享日程安排而建立的，但现在，它已成为最受欢迎的Web日历之一。

Google Web日历允许用户存储和共享诸如会议、生日、飞行时间、TV节目时间等事件；这个日历还可以与其他应用程序（例如Gmail和Google Earth）无缝集成。

全国计算机等级考试四级笔试试题一(上)

全国计算机等级考试四级笔试试题一（上）一、选择题。

(共90题,分为1分题和2分题,满分120分。

除标注2分题外,其它均为1分题。

）(1) 若或非门的输入变量为A和B,输出变量为Y,则A和B分别为下述哪一种情况时, Y 才为1?_____。

A) 1,0 B) 0,1 C) 0,0 D) 1,1(2) 已知寄存器A存有带符号整数且只作算术移位,HA和LA分别代表其最高位和最低位。

寄存器B存有带符号整数且只作逻辑移位,HB和LB分别代表其最高位和最低位。

当寄存器A与B都有左移位发生时,下述哪一个命题是正确的? _____。

(2分)A) LA与LB均成为0 B) LA与LB均成为1C) LA变成0但LB保持原值D) LA保持原值但LB的值改变(3) 下述哪一种情况称为指令周期?A) 取指令时间B) 取操作数时间C) 取指令和执行指令的时间D) 存储操作结果的时间(4) 设S是一个至少有两个元素的集合,且定义运算X*Y=X适用于S集中的所有元素X 和Y,下列命题中哪一个命题必是真命题?_____。

Ⅰ. *在S集中是可结合的Ⅱ. *在S集中是可交换的Ⅲ. *在S集中有单位元A) 只有ⅠB) 只有ⅡC) Ⅰ和ⅢD) Ⅱ和Ⅲ(5) 设Z是整数集,且设f:Z×Z→Z,对每一个∈Z×Z,有f()=m²n。

集合{0}的原象为_____。

(2分)A) {0}×ZB) Z×{0}C) ({0}×Z)∩(Z×{0})D) ({0}×Z)∪(Z×{0})(6) 对于一个只有3个不同元素的集合A来说,A上的等价关系的总数为_____。

A) 2 B) 5 C) 9 D) 取决于元素是否为数值(7) 设有命题:对于组成元素为集合的集合C,存在函数为f:C→∪C,使得对每一个S∈C,有f(S)∈S。

该命题的否命题是_____。

A) 对于集合C,对每个函数f:C→∪C,对每一个S∈C,都有f(S) ∈\ SB) 对于集合C,存在函数f:C→∪C,使对每一个S∈C,有f(S) ∈\ SC) 对于集合C,对每一个函数f:C→∪C,存在S∈C,使得f(S) ∈\ SD) 对于集合C,不存在函数f:C→∪C,使对某些S∈C,没有f(S) ∈\ S(8) 设(V,E)是一连通的无圈图,V包含3个3度顶点2个2度顶点r个1度顶点且V不再包含其他元素。

全国计算机等级四级机试试题及答案二(1-10)

全国计算机等级四级机试试题及答案二(1-10)1./* 程序PROG1.C的功能是：选出100至1000之间所有个位数字与十位数字之和被10除所得余数恰是百位数字的素数（如293）。

计算并输出上述这些素数的个数cnt以及这些素数值的和sum。

请考生编写函数countValue( )实现程序的要求，最后调用函数writeDAT( )把结果cnt和sum输出到文件out6.DAT中。

注意：部分源程序存放在PROG1.C中。

请勿改动主函数main( )和输出数据函数writeDAT( )的内容。

*/#includeint cnt, sum ;void countValue(){}void main(){cnt = sum = 0 ;countValue() ;printf("素数的个数=%d\n", cnt) ;printf("满足条件素数值的和=%d", sum) ;writeDAT() ;}writeDAT(){FILE *fp ;fp = fopen("OUT6.DAT", "w") ;fprintf(fp, "%d\n%d\n", cnt, sum) ;fclose(fp) ;}2. /* 编写函数sumValue( )，它的功能是：计算正整数n的所有因子(1和n除外)之和作为函数值返回。

例如：n=20时，函数值为21。

函数ReadWrite( )是实现从文件in9.dat中读取两个字符串，并调用函数sumValue()，最后把结果输出到文件out9.dat中。

注意：部分源程序存在文件PROG1.C中，请勿改动主函数main()和其它函数中的任何内容，仅在函数sumValue()的花括号中填入你编写的若干语句。

*/#include#includeint sumValue(int n){}main(){ clrscr() ;printf("%d\n", sumValue(20)) ;ReadWrite() ;}ReadWrite(){FILE *fp, *wf ;int i, n, s ;fp = fopen("in9.dat","r") ;if(fp == NULL) {printf("数据文件in9.dat不存在!") ;return ;}wf = fopen("out9.dat","w") ;for(i = 0 ; i < 10 ; i++) {fscanf(fp, "%d", &n) ;s = sumValue(n) ;fprintf(wf, "%d\n", s) ;}fclose(fp) ;fclose(wf) ;}3./* 请编写一个函数changeStr(char *s)，函数的功能是把s串中所有的字母改写成该字母的下一个字母，字母z改写成字母a。

计算机等级考试四级数据库笔试试题(含答案)

计算机等级考试四级数据库笔试试题（含答案）计算机等级在即，为大家分享以下的笔试试题，希望对大家的考试有所帮助!(1)在数据库应用系统生命周期模型中，规划与分析阶段的输出结果不包括A)需求标准说明书B)系统范围与边界C)可行性分析报告D)工程方案书(2)在信息系统的需求分析中，广为使用的DFD建模方法属于A)构造化分析方法B)数据分析方法C)数据抽象方法D)业务归纳方法(3)不允许出现在最终IDEF1X图中的是A)标定型联系B)非标定型联系C)分类联系D)多对多联系(4)以下哪些属性不适合建立索引?A)经常出现在GROUP BY字句中的属性B)经常参与连接操作的属性C)经常出现在WHERE字句中的属性D)经常需要进展更新操作的属性(5)在数据库应用系统生命周期模型中，作为系统总体设计阶段输入的是A)技术可行性分析报告和需求标准说明书B)软硬件选型和配置设计C)数据库应用系统体系构造设计D)应用软件总体设计(6)SQL Server 2000中，如果希望用户u1在DB1数据库中具有查询T1表的权限，正确的授权语句是A) GRANT SELECT ON DB1(T1) TO u1B) GRANT SELECT TO u1 ON DB1(T1)C) GRANT SELECT TO u1 ON T1D) GRANT SELECT ON T1 TO u1(7)SQL Server 2000提供了很多预定义的角色，下述关于public角色说法正确的选项是A)它是系统提供的效劳器级的角色，管理员可以在其中添加和删除成员B)它是系统提供的数据库级的角色，管理员可以在其中添加和删除成员C)它是系统提供的效劳器级的角色，管理员可以对其进展授权D)它是系统提供的数据库级的角色，管理员可以对其进展授权(8)关于ADO对象模型中的RecordSer，下述说法正确的选项是A)它用于定义连接的数据库名B)它用于定义数据的C)它是一个对象，用于在客户端内存中存放数据查询的结果D)它是一个对象，用于在效劳器端内存中存放数据查询的结果(9)关于ADO对象模型，下述说法正确的选项是A)它是与OLE DB同层的独立的接口集B)它是与ODBC同层的独立的接口集C)它是建立在OLE DB接口之上的高层接口集D)OLE DB是建立在ADO对象模型之上的高层接口集(10)关于UML的静态建模机制，下述说法错误的选项是A)用例模型是将满足用户需求的所有功能表示出来的工具B)用例图用于表示系统的数据模型和功能模型C)类图展现了一组类，接口和协作以及它们之间的关系D)组件图表示系统的静态实现视图，用于对源代码、可执行程序和物理数据库等进展建模(11)关于分布式数据库的分布策略，下述说法正确的选项是A)数据分配是对关系的操作，数据分片是对数据分配的操作B)集中式数据分配策略不便于进展数据控制C)全复制式数据分配策略可靠性高，响应速度快，但数据冗余大，同步维护复杂D)分割式数据分配策略对全局数据控制灵活，但对部分数据存取效率低(12)关于数据划分策略，下述说法错误的选项是A)散列划分采用某种散列函数，以数据的划分属性作为函数参数，计算数据应存储的磁盘序号B)范围划分根据某个属性的取值，将数据划分为n个部分，分别存储到不同磁盘上C)范围划分有利于范围查询和点查询，但也可能会引起数据分布不均匀及并行处理能力下降问题D)轮转法划分能保证元组在多个磁盘上的平均分配，并具有较高的点查询和范围查询(13)将新插入的记录存储在文件末尾，并使记录随机地分布在文件物理存储空间中的文件构造是A)堆文件B)聚集文件C)索引文件D)散列文件(14)有一个事务T要更新数据库中某表列的值，DBMS在执行T 时发现更新后的值超出了该列的值定义范围，因此异常终止了T。

计算机四级试题(附答案)

计算机四级试题（附答案）一、单选题（共63题，每题1分，共63分）1.以下行为不符合对电子信息系统的雷电防护的是（）。

A、设置安全防护地域屏蔽地，应采用阻抗大的导体。

B、设置避雷电网，应以深埋地下、与大地良好相通的金属板作为接地点。

C、一般以交界处的电磁环境有无明显的改变作为划分不同防雷区域的特征。

D、机房最好放在建筑物的中间位置，而且最好避开大楼外侧作为引下线的柱子。

正确答案：A2.IEEE802参考模型的LLC子层提供的虚电路服务属于（）。

A、无确认无连接服务B、无确认面向连接服务C、有确认无连接服务D、有确认面向连接服务正确答案：D3.DNS协议主要用于实现（）。

A、域名到IP地址的映射B、IP地址到域名的映射C、域名到物理地址的映射D、物理地址到域名的映射正确答案：A4.由一组用户群构成、不需要基站、没有固定路由器的移动通信网络是（）。

A、蜂窝通信网B、无线局域网C、ADhoC网络D、虚拟专用网正确答案：C5.下列网络协议中使用端口号“110”的是（）。

A、SMTPB、FTPC、POP3D、DNS正确答案：C6.TCP/IP协议中基于TCP协议的应用程序包括（）。

A、ICMPB、SMTPC、RIPD、SNMP正确答案：B7.广域网中的数据交换技术不包括（）。

A、高速交换B、电路交换C、报文交换D、分组交换正确答案：A8.无线局域网中为实现传输介质共享而采用的协议是（）。

A、CSMA／CAB、FTPC、CSMA／CDD、SDP正确答案：A9.在TCP／IP网络中，站点发送ARP请求所用的方式是（）。

A、单播B、组播C、转播D、广播正确答案：D10.采用广播信道通信子网的基本拓扑中不包括（）。

A、总线形B、树形C、环形D、网状形正确答案：D11.若码字中的信息为8位，编码时外加冗余位为2位，则此编码的效率为（）。

A、4C、0.5D、0.8正确答案：D12.针对数据包过滤和应用网关技术存在的缺点而引入的防火墙技术，这是（）防火墙的特点A、应用级网关型B、代理服务型C、包过滤型D、复合型防火墙正确答案：B13.TRUNK链路上传输的帧一定会被打上（）标记。

全国计算机等级考试四级笔试试题

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)(1)七进制6656.25变为十进制数的表达式为____。

A)6*7^4;6*7^35*7^26*7^12*7^——15*7^——2B)6*736*725*716*702*7——15*7——2C)6*1046*1035*1026*1012*10——15*10——2D)6*1036*1025*1016*1002*10——15*10——2(2)堆栈存储器存取数据的方式是____。

A)先进先出B)随机存取C)先进后出D)不同于前三种方式(3)为解决CPU和主存的速度匹配问题，其实现可采用介于CPU 和主存之间的____。

(2分)A)光盘B)辅存C)cache D)辅助软件(4)下面推理中哪些是正确的?____。

(2分)Ⅰ.前提：x(F(x)→G(x))，xF(x)结论：xG(x)Ⅱ.前提：xF(x)→y(G(y)→H(y))，xL(x)→yG(y)结论：x(F(X)∧(x))→yH(y)Ⅲ.前提：xF(X)，xG(x)结论：x(F(x)∧G(x))Ⅳ.前提：x(F(x)ˇG(x))结论：yF(y)A)Ⅰ与Ⅱ正确B)Ⅲ与Ⅳ正确C)Ⅰ、Ⅱ、Ⅲ都正确D)只有Ⅰ正确(5)设f:R→R,f(x)=[x]，其中R为实数集，[x]为小于等于x的最大整数，下列哪个命题为真?____。

A)f是单射的，但不是满射的B)f是满射的，但不是单射的C)f是双射的D)f既不是单射的，也不是满射的(6)设R是集合A={a,b,c}上的二元关系，且R={，}，下列命题中哪些为真?____。

Ⅰ.R是自反的并且是传递的Ⅱ.R是对称的并且是反对称的Ⅲ.R是A上的等价关系A)只有ⅠB)只有ⅡC)只有Ⅰ和ⅡD)只有Ⅱ和Ⅲ(7)以2,2,3,3,1,1,1,1为顶点度数列的所有非同构的无向树的个数为 ____。

计算机操作员四级考试题+答案

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A、2的10次方B、2的20次方C、2的30次方D、2的40次方正确答案：D2.为了避免混淆，八进制数在书写时常在后面加字母（）。

A、HB、OC、DD、B正确答案：B3.在Powerpoint2010中，“文件”选项卡可创建（）。

A、页眉或页脚B、新文件、打开文件C、动画D、图标正确答案：B4.下面关于域名的说法正确的是（）。

A、域名就是网址B、域名可以自己任意取C、域名专指一个服务器的名字D、域名系统按地理域或机构域分层采用层次结构正确答案：D5.在Word的编辑状态，选择四号字后，按新设置的字号显示的文字是（）。

A、插入点所在的段落中的文字B、文档中被选择的文字C、插入点所在行中的文字D、文档的全部文字正确答案：B6.在64位高档微机中，一个字长所占的二进制位数为（）。

A、32B、8C、16D、64正确答案：D7.UPS主要由（）组成。

A、蓄电池B、电阻C、电容D、电感正确答案：A8.将十进制的整数化为N进制整数的方法是（）。

A、除以N取余法B、乘以N取余法C、除以N取整法D、乘以N取整法正确答案：A9.当“我的电脑”窗口处于最大化状态，双击标题栏，会使窗口（）。

A、最小化B、关闭C、还原D、没变化正确答案：C10.当前较流行的VB、VC等是面向（）的程序设计语言。

A、机器B、对象C、结构D、过程正确答案：B11.汉字国标码（GB2312-80）规定，每个汉字用（）。

A、一个字节表示B、二个字节表示C、三个字节表示D、四个字节表示12.用Word中进行编辑时，要将选定区域的内容放到的剪贴板上，可单击“开始”功能区中的（）按钮。

A、剪切或替换B、剪切或清除C、剪切或粘贴D、剪切或复制正确答案：D13.以下对音频、视频设备的描述中，不正确的是（）。

A、视频信息的采集和显示播放是通过视频卡、播放软件和显示设备来实现的B、视频卡可以处理一些相关的音频信息C、视频设备是音、视频输入输出设备的总称D、音频设备既可采集音频信号，也可播放音频信号正确答案：D14.在Windows中，若在某一文档中连续进行了多次剪切操作，当关闭该文档后，“剪贴板”中存放的是（）。

全国计算机等级考试四级软件测试工程师笔试试题

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A)整除2 B)乘以2 C)整除4 D)乘以4(2) 已知寄存器A存有带符号整数,且只作逻辑移位,HA和LA分别代表其最高位和最低位;寄存器B存有带符号整数,且只作算术移位,HB和LB分别代表其最高位和最低位. 当寄存器A与B都有右移位发生时,下述哪一个命题是正确的? ____。

(2分)A)HA与HB均成为0 B)HA与HB均成为1C)HA变成0但HB保持原值D)HA保持原值但HB的值改变(3)若与非门的输入变量为A与B,输出变量为Y,则A和B分别为下述哪种情况时,Y才为0?____。

A)0,0 B)0,1 C)1,0 D)1,1(4)设S={1,2,3,4},下面哪个运算是S上的运算?_____。

A)X*Y=X-Y B)X*Y=X+Y C)X*Y=X·Y D)X*Y=(X·Y)(mod5)(其中,-,+,·分别为减法、加法和乘法运算)(5)设p,q为两个命题,对于"p→q"的逻辑涵义,下面的哪些叙述是正确的?_____。

Ⅰ.如果p,则qⅡ.p仅当qⅢ.p当qⅣ.q是p的充分条件A)Ⅰ和ⅡB)Ⅲ和ⅣC)Ⅱ和ⅣD)Ⅰ和Ⅲ共分21页，当前页是第1页-(6)在谓词逻辑中,令F(x)表示x是火车,G(y)表示y表示汽车,L(x,y)表示, "并不是所有的火车比所有的汽车快"的符号表示中哪些是正确的?_____。

(2分)Ⅰ. x y(F(x)∧G(y)→L(x,y))Ⅱ. x y(F(x)∧G(y)∧L(x,y))Ⅲ. x y(F(x)∧G(y)→L(x,y))A)仅ⅠB)仅ⅡC)Ⅰ和ⅡD)都不对(7)设R是集合A={a,b,c,d}上的二元关系,R={,,,,,}下面哪些命题为真?_____。

全国计算机等级四级机试试题及答案三(1-9)

全国计算机等级四级机试试题及答案三(1-9)1./*prog1 已知数据文件IN．DAT中存有500个三位数，并已调用读函数readdat()把这些数存入数组a中，请考生编制一函数jsValue()，其功能是：要求得出这些数的最大10个不重复的素数，且以从小到大的顺序依次存入数组b中，最后调用写函数writeDat()把数组b中的10个三位数输出到out.dat文件。

注意：部分源程序存在文件prog1.c文件中。

程序已定义数组：a[500]，b[10]请勿改动数据文件in.dat中的任何数据、主函数main()、读函数readDat()和写函数writeDat()的内容。

*/#includeint a[500], b[10] ;int isP(int m){int i ;for(i = 2 ; i < m ; i++)if(m % i == 0) return 0 ;return 1 ;}void jsValue(){}main(){int i ;readDat() ;jsValue() ;writeDat() ;for(i = 0 ; i < 10 ; i++) printf("b[%d]=%d\n", i, b[i]) ;}readDat(){FILE *fp ;int i ;fp = fopen("in.dat","r") ;for(i = 0 ; i < 500 ; i++) fscanf(fp, "%d,", &a[i]) ;fclose(fp) ;}writeDat(){FILE *fp ;int i ;fp = fopen("out.dat","w") ;for(i = 0 ; i < 10 ; i++) fprintf(fp, "%d\n", b[i]) ;fclose(fp) ;}2./*prog2 已知数据文件IN．DAT中存有500个三位数，并已调用读函数readdat()把这些数存入数组a中，请考生编制一函数jsValue()，其功能是：要求得出这些数的末位数字是偶数的最大10个不重复的三位数，且以从小到大的顺序依次存入数组b 中，最后调用写函数writeDat()把数组b中的10个三位数输出到out.dat文件。

计算机四级考试试题(含答案)

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A、4个步骤全部以广播的形式进行B、4个步骤全部以直接帧（有明确的目的地地址和源地址）形式进行C、4个步骤前两个是广播，后两个是直接帧D、4个步骤前两个是直接帧，后两个市广播正确答案：A2.若码字中的信息为8位，编码时外加冗余位为2位，则此编码的效率为（）。

A、0.25B、4C、0.8D、0.5正确答案：C3.局域网采用的双绞线为（）。

A、4类UTPB、6类UTPC、3类UTPD、5类UTP正确答案：D4.超文本传输协议HTTP标识被操作资源的方法是采用（）。

A、IP地址B、URLC、MAC地址D、域名正确答案：B5.在TCP／IP协议的传输层将数据传送给用户应用进程所使用的地址形式是（）。

A、IP地址B、MAC地址C、端口号D、soCket地址正确答案：C6.若使用二进制指数退避算法，发送成功概率最大的数据帧是（）。

A、首次发送的帧B、冲突2次的帧C、冲突8次的帧D、冲突4次的帧正确答案：A7.下列关于数据交换技术特点的说法中错误的是（）。

A、虚电路方式数据传送前要设置虚电路B、对于猝发式的通信电路交换最为合适C、数据报方式中目的地要重组报文D、报文交换不能满足实时通信要求正确答案：B8.TCP/IP参考模型中的主机－网络层对应于OSI参考模型的（）。

A、物理层和数据链路层B、网络层C、物理层物理层D、数据链路层和网络层正确答案：A9.误码率描述了数据传输系统正常工作状态下传输的（）。

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