2005四系试卷A
2005年6月大学英语四级CET4真题及答案_2
2005年6月大学英语四级CET4真题及答案2005年6月大学英语四级CET4真题及答案2005年6月大学英语四级CET4真题及答案a) are becoming more cautious about the products they are going to buyb) are still not willing to pay more for products with green labelingc) are becoming more aware of the effects different products have on the environmentd) still do not know the exact impact of different products on the environment33. a study was carried out by britain’s ncc to _______a) find out how many claims made by products fail to meet environmental standardsb) inform the consumers of the environmental impact of the products they buyc) examine claims made by products against iso standardsd) revise the guidelines set by the international standards organization34. what is one of the consequences caused by the many claims of household products?a) they are likely to lead to serious environmental problemsb) consumers find it difficult to tell the true from the falsec) they could arouse widespread anger among consumerd) consumers will be tempted to buy products they don’t need35. it can be inferred from the passage that the lobby group consumer international wants to ____.a) make product labeling satisfy iso requirementsb) see all household products meet environmental standardsc) warn consumers of the danger of so-called green productsd) verify the efforts of non-polluting productspassage 4two hours from the tall buildings of manhattan and philadelphia live some of the world’s largest black bears. they are in northern pennsylvania’s pocono mountains, a home they share with an abundance of other wildlife.the streams, lakes, meadows (草地), mountain ridges andforests that make the poconos an ideal place for black bears have also attracted more people to the region. open spaces are threatened by plans for housing estates and important habitats (栖息地) are endangered by highway construction . to protect the poconos’natural beauty from irresponsible development, the nature conservancy (大自然保护协会) named the area one of america’s “last great places”.operating out of a century-old schoolhouse in the village of long pond, pennsylvania, the conservancy’s bud cook is working with local people and business leaders to balance economic growth with environmental protection. by forging partnerships with people like francis altemose, the conservancy has been able to protect more than 14,000 acres of environmentally important land in the area.altemose’s family has farmed in the pocono area for generations. two years ago francis worked with the conservancy to include his farm in a county farmland protection program. as a result, his family’s land can be protected from development and the altemoses will be better able to provide a secure financial future for their 7-year-old grandson.cook attributes the conservancy’s success in the poconosto having a local presence and a commitment to working with local residents“the key to protecting these remarkable lands is connecting with the local community,”cook said. “the people who live there respect the land. they value quiet forests, clear streams and abundant wildlife. they are eager to help with conservation effort.for more information on how you can help the nature conservancy protect the poconos and the world’s other “last great places,”please call 1-888-564 6864 or visit us on the world wide web at .36. the purpose in naming the poconos as one of america’s “last great places”is to ________a) gain support from the local communityb) protect it from irresponsible developmentc) make it a better home for black bearsd) provide financial security for future generations37. we learn from the passage that _______a) the population in the pocono area is growingb) wildlife in the pocono area is dying out rapidlyc) the security of the pocono residents is being threatenedd) farmlands in the pocono area are shrinking fast38. what is important in protecting the poconos according to cook?a) the setting up of an environmental protection websiteb) support from organizations like the nature conservancy 共7页，当前第4页42005年6月大学英语四级CET4真题及答案相关内容:。
2005年4月份自考全国统一命题考试试题及答案
2005年4月份自考全国统一命题考试试题及答案Ⅰ.Vocabulary and Structure（10points，1point for each）从下列各句四个选项中选出一个最佳答案，填在该题后的括号内。
1. _____ or not you re conscious of it，you re constantly valuing items in dollars. 【】A. AsB. WhetherC. HoweverD. If2.Other people stop at each new word and look it_____in the dictionary. 【】A. upB. downC. backD. over3.Many of the younger buyers say they are turned off by the poor_____of modern goods.【】A. securityB. quantityC. safetyD. quality4.In one type of laboratory test all the variables _____one are controlled. 【】A. byB. andC. butD. or5. _____ when you go through the mental exercises to come up with a tentative definition should you open the dictionary to see if you re right. 【】A. SimplyB. PreciselyC. OnlyD. Particularly6.The satellite also demonstrated how it could provide help to people living in isolated areas where _____is difficult. 【】A. transportationB. instructionC. applicationD. compensation7.Their mother is busy ready for work. 【】A. gotB. getsC. to getD. getting8.Itwas long supposed that the main difference between animals and plants was that the former could move about while the could not. 【】A. otherB. latterC. anotherD. later9.The moon merely _____ the light of the sun，like a huge mirror hung in the sky. 【】A. reflectsB. demonstratesC. transmitsD. launches10.Some people who are very intelligent and successful in their fields find_____difficult to succeed in language learning. 【】A. whichB. howC. thatD. itⅡ.Cloze Test（10points，1point for each）下列短文中有十个空格，每个空格有四个选项。
2005年12月四级A卷试题及答案（文字版）（2）
2005年12月四级A卷试题及答案（文字版）（2）Part II Reading comprehension (35 minutes)Directions: There are 4 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 and mark the corresponding letter on the Answer Sheet with a single line through the centre.Passage OneQuestions 21 to 25 are based on the following passage.Just five one-hundredths of an inch thick, light golden in color and with a perfect “saddle curl,” the Lay’s potato chip seems an unlikely weapon for global domination. But its maker, Frito-Lay, thinks otherwise. “Potato chips are a snack food for the world,” said Salman Amin, the company’s head of global marketing. Amin believes there is no corner of the world that can resist the charms of a Frito-Lay potato chip.Frito-Lay is the biggest snack maker in America, owned by PepsiCo, and accounts f or over half of the parent company’s $3 billion annual profits. But the U.S. snack food market is largely saturated, and to grow, the company has to look overseas.Its strategy rests on two beliefs: first, a global product offers economies of scale with which local brands cannot compete, and second, consumers in the 21st century are drawn to “global” as a concept. “Global” does not mean products that are consciously identified as American, but ones that consumers —especially young people — see as part of a modem, innovative(创新的) world in which people are linked across cultures by shared beliefs and tastes. Potato chips are an American invention, but most Chinese, for instance, do not know that Frito-Lay is anAmerican company. Instead, Riskey, the company’s research and development head, would hope they associate the brand with the new world of global communications and business.With brand perception a crucial factor, Riskey ordered a redesign of the Frito-Lay logo(标识). The logo, along with the company’s lo ng-held marketing image of the “irresistibility” of its chips, would help facilitate the company’s global expansion.The executives acknowledge that they try to swing national eating habits to a food created in America, but they deny that amounts to economic imperialism. Rather, they see Frito-Lay as spreading the benefits of free enterprise across the world. “We’re making products in those countries, we’re adapting them to the tastes of those countries, building businesses and employing people and changing lives,” said Steve Reinemund, PepsiCo’s chief executive.原文出处：FritoLay: Using Potato Chips to Spread the Spirit of Free EnterpriseJust five one-hundredths of an inch thick, light golden in color and with a perfect "saddle curl," the Lay#39;s potato chip seems an unlikely weapon for global domination.But its maker, T exas-based Frito-Lay, thinks otherwise. "Potato chips are a snack for the world," said Salman Amin, the company#39;s head of global marketing. Amin believes there is no corner of the world, no race or tribe, that can resist the charms of a Frito-Lay potato chip.The Chinese might have their nyen gao ping, made from rice flour, and the Indians their lentil-and-chickpea namkeens, but Frito-Lay believes they would rather be eating potato chips. Thecompany#39;s research has shown that when given a choice between their local snack and a Frito-Lay chip, consumers in most countries will choose the chip.Putting its findings into practice, Frito-Lay has expanded on all five continents by buying up local snack makers or defeating them with its marketing expertise and sheer size."Never have we introduced Lay#39;s potato chips and had it not be successful," said Dwight Riskey, the research and development head who devised Frito-Lay#39;s global strategy five years ago. "It#39;s been successful every single place we#39;ve introduced it."Thinking Globally, Acting GloballyFrito-Lay, which also produces Doritos and Chee-tos, is the biggest snack maker in the United States, with 55 percent of the potato chip market. It is owned by PepsiCo, and accounts for more than half of the parent company#39;s $3 billion profits every year. But the U.S. snack market is largely saturated, and in order to grow — the key to remaining successful — the company had to look overseas.Riskey#39;s strategy rests on two beliefs: first, that a global product offers economies of scale with which local brands cannot compete, and second that consumers in the 21st century are drawn to "global" as a concept. By "global," Riskey does not mean products that are consciously identified as American, like Coca-Cola and Nike, but ones that consumers —especially young people — see as part of a modern, innovative world in which people are linked across cultures by shared beliefs and tastes. Potato chips are an American invention — created by a chef in Saratoga Springs, N.Y. in 1853 — but most Chinese, for instance, do not know that Frito-Lay is an American company.Instead, Riskey would hope they associate the brand with the brave new world of global communications and business.With brand perception a crucial factor, Riskey ordered a redesign of the Frito-Lay logo, eventually settling on a red logo with a banner suggesting "celebration" and a sun denoting "universality." The logo, along with the company#39;s long-held marketing image of the "irresistibility" of its chips, would underpin the company#39;s global expansion.Taking Aim at the Local SnackFrito-Lay honed a strategy for moving into new countries where a local snack industry is already established. Rather than face the costs of building a new business in an unfamiliar market, the company identifies the leading local snack manufacturer and offers to buy it out. If the local manufacturer refuses to sell, Frito-Lay moves into the market on its own, using its size and marketing experience to cut into the local manufacturer#39;s sales. Often, at that point, the local company gives in and sells, sometimes for a lower price than the original offer.If the preferred local snack is already a potato chip, Frito-Lay rebrands it. After buying Walkers, the dominant chip in Britain, the Texas company refashioned the Walkers logo into the red "banner sun" design, as a first step toward changing the brand to Frito-Lay outright. Similar plans are under way for Sabritas in Mexico and Simba in South Africa. "We just say, #39;You know that stuff you love? Well, now it#39;s going to be called Lay#39;s,#39;" said Riskey.If the locals are used to eating something other than potato chips, Frito-Lay devises "differentiated products" that bridge the way to the chip. For the Indian market, the company created Kurkure Twisteez, a potato snack that comes in local flavors likeMasala Munch.Sometimes Frito-Lay#39;s products are so unfamiliar that the advertising campaigns focus on educating consumers in the hope of changing their "consumption habits." In China, Frito-Lay ads show potatoes actually being sliced, so people know where the chips come from. In Turkey, the company distributed pamphlets suggesting new recipes and eating habits: "Try a tuna sandwich for lunch, and join it with a bag of chips."Looking for #39;New Occasions#39;Like other multinational companies, Frito-Lay has learned that the best managers are often locals who know the market and culture well. Although they must follow certain global standards —such as the company#39;s long-held marketing theme of "irresistibility" — regional managers are encouraged to look for for new "occasions" to increase sales in their specific areas.In Holland, where the Dutch tend to eat potato chips only at night, as an after-dinner snack, manager Eugene Willemsen focused his efforts on changing their habits by distributing free samples on the streets during the day. He also targeted high schools, knowing that children were driving Frito-Lay#39;s growth in Holland. "For us, the biggest opportunity for growth is to penetrate new occasions with salty snacks," Willemsen said.In South Africa, national sales manager Arnold Selokane boosted sales in native townships by hiring local drivers to make deliveries, making the product seem less foreign. In China, sales director Jackson Chiu raised sales by 57 percent in one year, in part by focusing on girls and young women. "We market to girls and the boys follow," he said.The company encourages such initiative by flying promisingmanagers to the Frito-Lay headquarters in Plano, Texas, or the PepsiCo campus in Purchase, N.Y., for intensive courses on marketing and business development. Selokane and Chiu were among 200 PepsiCo employees honored at the company#39;s annual "Ring of Honor" ceremony in 2001. With honorees from 50 countries, speaking 30 different languages, the four-day program resembled the United Nations#39; General Assembly, complete with headsets and banks of translators.Not Just Potato ChipsThe executives behind Frito-Lay#39;s global expansion acknowledge that they try to swing national eating habits to a food that was created in America, but they deny that amounts to economic imperialism. Rather, they see Frito-Lay as spreading the benefits of free enterprise across the world. "We#39;re making products in those countries, we#39;re adapting it to the tastes of those countries, building businesses and employing people and changing lives," said Steve Reinemund, PepsiCo#39;s chief executive.Frank Wong, who runs Frito-Lay#39;s operations in China, believes that by training Chinese managers the company is helping build up an educated middle class that will play a major role in the country#39;s economic transformation. "We bring a lot to China, a lot more than just the brand called Lay#39;s," he said.21. It is the belief of Frito-Lay’s head of global marketing that _____.A) potato chips can hardly be used as a weapon to dominate the world marketB) their company must find new ways to promote domestic salesC) the light golden color enhances the charm of their company’s potato chips{D) people all over the world enjoy eating their company’s potato chips}22. What do we learn about Frito-Lay from Paragraph 2?A) Its products used to be popular among overseas consumers.B) Its expansion has caused fierce competition in the snack marker.C) It gives half of its annual profits to its parent company.{D) It needs to turn to the world market for development.}23. One of the assumptions on which Frito-Lay bases its development strategy is that _____.{A) consumers worldwide today are attracted by global brands}B) local brands cannot compete successfully with American brandsC) products suiting Chinese consumers’ needs bring more profitsD) products identified as American will have promising market value24. Why did Riskey have the Frito-Lay logo redesigned?A) To suit changing tastes of young consumers.{B) To promote the company’s strategy of globalization. }C) To change the company’s l ong-held marketing image.D) To compete with other American chip producers.25. Frito-Lay’s executives claim that the promoting of American food in the international market _____.A) won’t affect the eating habits of the local peopleB) will lead to economic imperialism{C) will be in the interest of the local people} D) won’t spoil the taste of their chips。
2005年6月四级答案
d) the woman feels sorry that mr. brown is unable to come.
3. a) at 1030.b) at 1025.c) at 1040.d) at 1045.
4. a) the man no longer smokes.
b) he man is under pressure from his wife.
c) the man usually follows his wife’s advice.
d) theman refuses to listen to his doctor’s advice.
d) mark and the woman had not been in touch for some time.
2. a) the man is late for the trip because he is busy.
b) the woman is glad to meet mr. brown in person.
5. a) move to a big city.
b) become a teacher.
c) go back to school.
d) work in new york.
6. a) quit delivering flowers.
b) work at a restaurant.
c) bring her flowers every day.
(s8) _____________________________. today, three buildings hold the library’s collection. (s9) ______________________________. it buys some of its books and gets others as gifts. it also gets materials through its copyright office. (s10) ________________________________. this means the library of congress receives almost everything that is published in the united states.
武汉大学分析化学试卷及答案
武汉大学2005-2006学年度第一学期《分析化学》期末考试试卷（A）学号姓名院（系）分数一.填空（每空1分。
共35分）1．写出下列各体系的质子条件式：(1)c1(mol/L) NH4 H2PO4(2)c1(mol/L)NaAc+ c2(mol/L)H3BO32.符合朗伯-比尔定律的有色溶液，当有色物质的浓度增大时，其最大吸收波长，透射比。
|3. 检验两组结果是否存在显著性差异采用检验法，检验两组数据的精密度是否存在显著性差异采用检验法。
4．二元弱酸H2B，已知pH＝时，δH2B ＝δHB-；pH＝时δHB-＝δB2-, 则H2B的p K a1＝，p K a2＝。
5.已知(Fe3+/Fe2+)=，(Ce4+/Ce3+)=，则在1mol/L H2SO4溶液中用mol/L Ce4+滴定mol/L Fe2+，当滴定分数为时的电位为，化学计量点电位为，电位突跃范围是。
6.以二甲酚橙(XO)为指示剂在六亚甲基四胺缓冲溶液中用Zn2+滴定EDTA，终点时溶液颜色由_________变为__________。
7.某溶液含Fe3+10mg，用等体积的有机溶剂萃取一次后，该溶液中剩余，则Fe3+在两相中的分配比= 。
8.容量分析法中滴定方式有, , 和。
与Na2S2O3的反应式为。
10.以波长为横坐标，吸光度为纵坐标，测量某物质对不同波长光的吸收程度，所获得的曲线称谓；光吸收最大处的波长叫做，可用符号表示。
[11.紫外可见分光光度计主要由, , , 四部分组成.12.桑德尔灵敏度以符号表示,等于；桑德尔灵敏度与溶液浓度关，与波长关。
13.在纸色谱分离中，是固定相。
14..定量分析过程包括 , ,, 和。
二、简答题（每小题4分，共20 分，答在所留空白处）1.什么是基准物质什么是标准溶液}2.分别简单阐述酸碱滴定指示剂,络合滴定指示剂, 氧化还原滴定指示剂和沉淀滴定指示剂指示滴定终点的原理.3.在进行络合滴定时,为什么要加入缓冲溶液控制滴定体系保持一定的pH4.吸光光度法中测量条件的选择应注意哪几点5. 分析化学中常用的分离和富集方法有哪些(回答不能少于8种方法)三、分析方法设计（共15分，写在答题纸上）1. 设计测定含有中性杂质的Na2CO3与Na3PO4混合物中二组分质量分数的分析方案。
20042005学年下学期第一次四校联考
2004—2005学年下学期第一次四校联考英语试卷2005年3月24日第Ⅰ卷一、单项选择1. The_______ is just around the corner and you won’t miss it .A. bicycle’s shopB. bicycle shopC. bicycles shopD. bicycles’ shop2. -----I hear the workers in this factory get paid by ______week.------Correct, and most of then get about 300yuan______week.A. ×, aB. the, ×C. a, theD. the, a3. ------shall we go to see a film or play computer games?--------_______I’d like to go sightseeing around the lake.A. NeitherB. EitherC. BothD. None4. The medicine is to be taken______.A. three time a dayB. a day three timesC. three times a dayD. a day three time5. ------Have you finished your report yet?-------No, I’ll finish in ______ten minutes.A. anotherB. otherC. moreD. less6. This question is of the _______importance of all.A. lessB. leastC. fewerD. fewest7. She usually goes to school _______ bus; but sometimes she goes to school _______ a taxi.A. in; inB. by; byC. in; byD. by; in8. When you read the book, you’d better make a mark ______ you have any questions.A. at whichB. at whereC. the place whereD. where9. If you _______succeed, you must work as hard as you can.A. willB. are toC. is goingD. should10. ------Has the doctor arrived yet?-------No, she ________an hour ago.A. has to comeB. ought to have comeC. should comeD. used to come11. Are all Chinese textbooks _______in your _______house?A. publishing; publishingB. published; publishedC. publishing; publishedD. published; publishing12. If we ______, we won’t get tired.A. to take driving by turnsB. drive in turnsC. take each turns drivingD. take turns driving13. When and where to have the next discussion ________yet?A. has not decidedB. is not decidedC. have not decidedD. are not decided14. Only by doing the work themselves, ________.A. the students will get experienceB. the students will be sure to get experienceC. will the students get experienceD. will be the students sure to get experience15. ------it looks as if a storm is coming up.-------- Yes, _______.A. it certainly doesB. it certainly isC. it looks soD. it is coming16. ------ can you work out this difficult exercise?-------- Though difficult, I still think it ______my ability.A. withoutB. withinC. beyondD. inside17. As soon as the suggestion was ______, people showed great interest in it.A. put outB. put upC. put forwardD. put on18. With its goal _______the first class of the world, the university is now trying its best.A. aimed atB. aiming atC. to aim atD. aim at19. The great success, ________by different-field scientists hard working for years greatly encourages the whole country.A. achievingB. achievedC. was achievedD. to achieve20. ------where ______ Margaret have put the empty bottles?-------- She ________ them away. They must be somewhere.A. Can; can’ t have thrownB. must; needn’ tC. must; must have thrownD. can; must throw21. -------What would you like to say about your last trip through the desert?------Nothing _______more important than water.A. must have beenB. could have beenC. might beD. is22. Was it at the crossing ________the accident happened?A. at whichB. whereC. thatD. there23. I can hardly imagine Peter _______across the Atlantic Ocean in five days.A. sailB. to sailC. sailingD. to have sailed24. The mountains covers about seven square kilometers, with its peaks_____.A. ranging between1,500 meters high and 3,300metres high.B. range from 1,500 meters high to 3,300 meters high.C. ranged between 1,500metres high and 3,300 meters high.D. ranging both 1,500 meters high and 3,300 meters high.25. Although the government has tried its best to improve peasants’lives, they are still at the _______of the society.A. floorB. bottomC. topD. end二、完型填空（每小题1.5分，共20分，满分30分）I’ve really got to do something to lose weight because I’m getting much too fat. I wasn’t _____about it until I went to see the doctor. She told me that I’d _____have a heart attack______ I started eating less. She said, “When you are on ______you have to resist the temptation to eat even though you feel ______. This may be very hard to do and you certainly need a lot of ______to succeed.”So , I’m going to a ______farm for a month where I won’t be able to ______much and where I’ll have to ______my diet. They will all also made me take plenty of ______, which won’t do me any ______either. Both the diet and the exercise will help me to lose ______and feel healthier. People say that health farms are like _____ where every one is ______up and given carrot juice and lettuce when really wants a big ______. In fact, that’s exactly the kind of discipline I ______,because whenever I see someone having a ______in a TV program, I feel like a drink myself and it’s ______cigarettes and food. ______me luck; when you see me again, I’ll be so slim that you won’t ______ me.26. A. afraid B. worried C. surprise D. pleased27. A. possibly B. likely C. probably D. perhaps28. A. even if B. until C. unless D. if29. A. holiday B. business C. trip D. diet30. A. unhappy B. hungry C. angry D. sad31. A. will power B. energy C. fire D. money32. A. large B. green C. health D. animal33. A. sleep B. do C. work D. eat34. A. stick to B. depend on C. feed on D. devote to35. A. water B. fresh air C. exercise D. deep breath36. A. good B. harm C. favour D. help37. A. heart B. weigh C. temper D. sigh38. A. hospital B. school C. office D. prisons39. A. lock B. held C. taken D. brought40. A. bread B. apple C. meal D. chicken41. A. hate B. need C. like D. do42. A. meal B. nest C. walk D. drink43. A. the same with B. opposite to C. different from D. Whit44. A. Expert B. Hope C. Give D. Whit45. A. scold B. recognize C. praise D. punish三、阅读理解（每小题2分，共20小题）AOn May 21,1999,some American scientists were working at the computers to look forinformation they needed. Suddenly they saw a lot of very bright red spots crossing the computers’screens. At the same time the computers were working much slower. To find out what was happening ,they stopped their work to check some parts of the computers. To their horror, they found out that most of their stored information was got rid of by computer viruses (病毒)! Obviously all these computers had been infected by computer viruses.It is said that the computer viruses were made by two or three Philippine young men fond of playing tricks. They all had excellent education. They created the viruses just to show their intelligence (才智) . The kind of computer virus is named “I Love You” Virus. This virus can hide in computers for a long time .when the time comes they will attack the computers by lowering the important functions (功能), damaging their normal programs or even getting rid of a great deal of information which operators of the computers often use of store .What’s worse, it still can reproduce itself in great quantities within a short time.We have come to know that “I Love You” Virus often attacks computers on Mondays and that it is spreading to many computers in the world. Among the countries that suffered computer viruses recent years are Britain , Australia, Switzerland and the U.S. Those who made the computer viruses have been found out slowly and carefully. But till now, how to get rid of the terrible viruses remains a problem.46. Two or three Philippine young men created the computer viruses to _______.A. damage the computersB. test their ability quicklyC. tell the world that they were intelligentD. play a trick on operators of the computers47. According to the passage, computer viruses seem to ________.A. have been in nature for yearsB. exist in any computersC. be able to be got rid of in the near futureD. be difficult to get rid of at present48. The most serious damage caused by the viruses is that _________.A. the computer’s functions are loweredB. the normal programs are damagedC. most of the information stored in the computers is goneD. the computers infected by the viruses can no longer be used49. According to the passage , which of the following is true?A. Scientists are trying to find a way to get rid of the virusesB. The viruses will come to the new computer after staying in the old one for some timeC. Last year four countries found their computers were infected by viruses.D. The “I Love You” Virus is a great harm to human healthBHave you ever used a typewriter? If not , you’ve surely seen one .This useful machine has a most interesting history.Although you may think that the typewriter is a modern invention, the idea goes as far back as the early 1700s. It was then, in 1714, that England’s Queen Anne granted Henry Mill the first patent(专利) for a machine that typed letters. Called An Artificial Method For Impressing Letters, the machine remained just a design on paper.Various other typing machines were invented over the next hundred years or so. However, all of them had the same problem: they required more time to use than writing the same material by hand. Things improved a little around 1829 when an American named William Burt invented a machine called the desired letter. He also pressed a bar to link the paper. The machine printed letters well, but it had a top speed of only five words a minute.Finally, in 1874 , a more practical machine was introduced to the public. Invented by an American Christopher Sholes and some of his companions, the machine was set up by E Remington and Sons and called the “Remington Model No.1”. It was the first typewriter to have the kind of typewriter keyboard we know today.You may have a look at the typewriter keyboard and wonder about the strange arrangement of letters. The arrangement, strangely enough, has nothing to do with making typing easier of faster. As a matter of fact, the keys were so arranged to force typists to type lower, Typing too fast caught the keys of Remington I pressed together. They still follow this early arrangement of letters of the keyboard.50. What does the writer mainly talk about in this passage?A. What a typewriter is.B. How the typewriter was invented.C. The function and use of a typewriter.D. Remington and his invention51. “An Artificial Machine” was_________.A. the first typewriter that was made by Henry MillB. highly praised by England’s Queen as the first typewriterC. hardly produces at allD. made as the first typewriter in 171452. The first typewriters were made_________.A. from 1700 to 1714B. in the eighteenth centuryC. in the nineteenth centuryD. in the twentieth century53. That the keyboard was designed so as today is because ________.A. the inventor wanted to make typing easier than writingB. the inventor meant to prevent the keys from being pressed togetherC. that it was arranged strangelyD. it has nothing to do with RemingtonCRichard Gray was a famous explorer (勘探者). He was also a millionaire. He had visited every country in the world. He had crossed Antarctica, flown across the Atlantic by balloon, and climbed Mount Everest. Last year he decided to walk across Death Valley, the hottest place on Earth. He walked for days over the hot desert sand. One night he found the camp (宿营地) where he had been the night before, Gray had walked in a circle. He was lost.Two days later he had drunk all his water. He couldn’t walk. He crawled to the top of a sand dune (沙丘),and there he saw a man. The man was wearing smart, clean trousers, clean trousers, a whiteshirt and a tie. Gray crawled over to him.“Water…water…” he said.“I’m terribly sorry, old boy,” replied the man, “but I haven’t got any water with me.”“help me!” shouted Gray, “I’m a rich man…a millionaire…I’ll give you anything.”“that’s very nice of you, old boy,” said the man. “Look, I can’t give you any water, but would you like to buy my tie?”“A tie? Of course not!” screamed Gray, and crawled away, He crawled slowly up the next sand dune. His mouth was full of sand. His lips were cracked (破裂) and dry. He couldn’t breathe. He reached the top of the dune and there he saw a huge good hotel Girls were swimming in the large swimming pool. Beautiful fountains were all around the hotel.“Is it a mirage (幻景)?” he thought , “Am I dying?” He stood up and staggered (蹒跚) down the dune.A waiter in a shining white uniform came out of the door .“Water…water…a bath! Food !”screamed Gray.“I’m sorry ,you can’t come into this hotel,” said the waiter.“Why not? I’ve got plenty of money…I’m a millionaire.”“Ah,” replied the waiter, “but you aren’t wearing a tie!”54. The famous explorer________.A. had crossed Antarctica and the Atlantic by balloonB. had traveled all over the worldC. had walked across Death V alleyD. had ever been a millionaire55. Death V alley is ________.A. a valley where people may die from loss of waterB. a dead place where people dare not goC. a terribly hot valley where people may die of heatD. a place’s name56. Two days later Richard Gray_________.A. was lost in a circleB. was drunkC. began to search for water in the desertD. crawled to the top of a dune to see a man57. Gray saw __________from the top of the next dune.A. a large good hotelB. many swimming girlsC. a lot of drinking waterD. a beautiful mirageDMr Luk: Now tell me something about yourself and why you applied (申请) for this job.David: I left school three months ago. My results were fairly good but I have to support my family now. My father has recently stopped working because he is too old. My parents need the money to educate my younger brother and sister.Mr Luk: I see. Have you had any experience already?David: I worked in a radio factory for two months.(David pauses.)Mr Luk: That’s very short time, isn’t it?David: Oh, yes. The factory wanted extra people for their busy season.Mr Luk: I understand. Why do you want to do this job?David: My wish is to become a skilled technician (技术员).Mr Luk: You must understand that this is not easy work and the hours are long. You may have to do shift work (轮班)and work beyond the usual time, too. You would start from the very beginning.David: Will I be trained here?Mr Luk: Partly, if you pass our tests, you will be able to go to technical school classes twice a week. The tests are held after you have been here for two months. Then we can check if you are suitable for the job.David: That’s fine. I’ll make sure that I pass.Mr Luk: All right. I’ll give you a chance. My secretary will tell you whom to see when you start. You can start work on the first of next month. Is that all right.David: Yes, and thank you very much indeed.58. Why did David go to see Mr Luk?A. He had read about him in a newspaper.B. He had applied for a job in Mr Luk’s company.C. He wanted to ask Mr Luk if there were any jobs in his companyD. He wanted to tell Mr Luk about his family.59. David had to help to support his family because______A. he had left schoolB. he had lost his job in the radio factoryC. he was old enough to start workingD. his father was no longer working60. How did David feel about the news of tests?A. He thought he would be able to avoid taking themB. He did not seem worried about themC. He was worried at first but he soon became sure of himselfD. He did not understand what Mr Luk meant61. Mr Luk did NOT warn David that_________A. he might have to work beyond the usual timeB. he would have to pass testsC. he would have to learn to driveD. the job was not easyEJuly 16th was a bad day for Mr. Arthur Johnson. In the morning, he set off from his home in Santa Barbara, California. It was the start of his summer holydays and he decided to visit friends at Las Vegas，then he hoped to go fishing in Lake Mead, from Las Vegas.Johnson’s troubles started while he was driving happily across the Mojave Desert. His car went wrong and he tried to repair it .Then, to make matters worse, his attempts to start the car drained (耗尽)the battery (电池) and left it useless. After Johnson had waited an hour in the hot sun, a Canadian driver, John Williams, stopped and tried to help him. When both men failed, Williams promised to telephone a workshop to ask it to send a truck to pull the car away and repair its fuel pump (燃没泵).Johnson left the keys in his car and sat in the shade of a large tree. Soon he fell asleep. While he was sleeping, a repair truck arrived from San Pedro (the nearest town) and pulled his car away. Later on, Johnson woke up and thought that somebody had stolen his car. He started to walk back towards San Pedro but a police car stopped him to find out why he was walking in the desert.Johnson looked like a man wanted (通辑的) in Los Angeles for robbery, so the police detained (拘留) him at San Pedro for the right. The next day, Johnson telephoned his friends in Los Angeles. They drove to San Pedro and made the police believe that Johnson was a harmless salesman, so they set him free.62. Johnson’s car went wrong_______.A. after he had passed San PedroB. Before he left Santa BarbaraC. when he was getting neat the Mojave DesertD. not far from Los Angeles63. Which way did Williams go when he left Johnson?A. He drove on to Las Vegas.B. He went back to Los AngelesC. Perhaps he went to San PedroD. He continued his journey to Canada64. How did Williams help Johnson?A. He persuaded the police to set him freeB. He failed to repair his carC. He drove Johnson into San PedroD. He arranged to have his car repaired65. Which is the best title of this passage?A. A Bad Day for Arthur JohnsonB. An Interesting CarC. A Pleasant Trip in the DesertD. A Well-planned Journey第Ⅱ卷四、单词拼写（共10小题，每题1分，满分10分）A：Read each of the following sentences and try to guess the missing word. The first letter is given.1. Mr Zhu made a v around the world on very Little money.2. When will humans put a stop to war and have p peace.3. My father is a b . He sells meat.4. He is b as a scientist; but at home he is like a baby.5. The dog was the man’s only c in his old age.B: Complete the sentences with words that have the opposite meaning of the underlined words.6. Although most of us are just ordinary people, every one of us is .7. All metals become liquid at high temperatures, and turn again when cooing off.8. Do you think a full bottle of water will or sink.9. As the water supply is , water prices are expected to keep increasing.10. It’s wrong to doubt his honesty. I him.五、填空（共10小题，每题1分，满分10分）Choose the right words and use their correct form to fill I n the blanks. Some may be used more______as ______ a man to the moon. When ancient humans Learn to use stone ______ and make fire, it meant the beginning of ________ society. Later discoveries------- bronze, iron, steam, electricity, to name a few-------continued the development of society and ________history. So _______were these achievements that we often divide human________ into time ______named after the ________technology of the time; the stone Age, the Bronze Age, the iron Age and so on.六、短文改错（共10小题，每小题1分，满分10分）Clocks, as we know, were probable developed 1._________By very religious people in Europe in thirteenth century. 2.________They need to know the exact time so that they could pray 3._________at the right time. During the 1700s, people had clocks 4._________and watches that were accurate to the minute, Some 5._________clocks were beautiful. The moved parts in them were not 6._________simple, Some had figures of people of animals who moved 7.__________on the hour and quarter hour. Others played music. The 8._________movement of the parts is beautiful to watch it if they are 9._________clearly or when you open these clocks. 10_________七、书面表达（满分25分）某外资公司招聘外语人才。
2005英语四级真题及答案
2005年12月24日大学英语四级考试A卷真题含答案Listening Comprehension (20 minutes)Part 1 Section A1 A) See a doctorB) Stay in bed for a few days.C) Get treatment in a better hospital.D) Make a phone call to the doctor.2 A) The 2:00 train will arrive earlier.B)The 2:30 train has a dining car.C) The woman prefers to take the 2:30 train.D) they are gong to have some fast food on the train.3 A) She has been longing to attend Harvard University.B)She’ll consider the man’s suggestion carefully.C)She has f inished her project with Dr. Garcia’s help.D)She’ll consult Dr. Garcia about entering graduate school.4 A)Alice didn’t seem to be nervous during her speech.B)Alice needs more training in making public speeches.C)The man can hardly understand Alice’s presentation.D)The man didn’t think highly of Alice’s presentation.5 A)It’s worse than 30 years ago.B)It remains almost the same as before.C)There are more extremes in the weather.D)There has been a significant rise in temperature.6 A)At a publishing house.B)At a bookstore.C)In a reading roomD)In Prof. Jordan’s office7 A)The man can stay in her brother’s apartment.B)Her brother can help the man find a cheaper hotel.C) Her brother can find an apartment for the man.D)The man should have booked a less expensive hotel.8 A)Priority should be given to listening.B)It’s most helpful to read English newspapers every day.C) It’s more effective to combine listening with reading.D)Reading should come before listening.9 A)It can help solve complex problems.B)It will most likely prove ineffectiveC)It is a new weapon against terrorists.D)It will help detect all kinds of liars.10 A)Help the company recruit graduate students.B)Visit the electronics company next week.C)Get apart-time job on campus before graduation.D)Apply for a job in the electronics companySection BPassage OneQuestions 11 to 13 are based on the passage you have just heard.11 A)It ha been proven to be the best pain-killer.B)It is a possible cure for heart disease.C)It can help lower high body temperature effectively.D)It reduces the chance of death for heart surgery patients.12 A)It keeps blood vessels from being blocked.B)It speeds up their recovery after surgery.C)It in creases the blood flow to the heart.D)It adjusts their blood pressure.13 A)It is harmful to heart surgery patients with stomach bleeding.B)It should not be taken by heart surgery patients before the operation.C)It will have considerable side effects if taken in large doses.D)It should not be given to patients immediately after the operation.Passage TwoQuestions 14 to 16 are based on the passage you have just heard.14 A)They strongly believe in family rules.B)They are very likely to succeed in life.C)They tend to take responsibility for themselvesD)They are in the habit of obeying their parents.15 A)They grow up to be funny and charming.B)They often have a poor sense of direction.C)They get less attention from their parents.D)They tend to be smart and strong-willed.16 A)They usually don’t follow family rules.B)They don’t like to take chances in their lives.C)They are less likely to be successful in life.D)They tend to believe in their parent’s ideas.Passage ThreeQuestions 17 to 20 are based on the passage you have just heard.17 A)They wanted to follow his example.B)They fully supported his undertaking.C)They were puzzled by his decision.D)They were afraid he wasn’t fully prepared.18 A)It is more exciting than space travel.B)It is much cheaper than space travel.C)It is much safer than space travel.D)It is less time-consuming than space travel.19 A)They both attract scientists’ attentionB)They can both be quite challengingC)They are both thought-provoking.D)They may both lead to surprising findings.20 A)To show how simple the mechanical aids for diving can be.B)To provide an excuse for his changeable character.C)To explore the philosophical issues of space travel.D)To explain why he took up underwater exploration.Part II Reading comprehension (35 minutes)Passage OneQuestions 21 to 25 are based on the following passage.Just five one-hundredths of an inch thick, light golden in color and with a perfect “saddle curl,” the Lay’s potato chip seems an unlikely weapon for global domination. But its maker. Frito-Lay. Thinks otherwise.” Potato chips are a snack food for the world,” said Salman Amin, the company’s head of global marketing. Amin believes there is no corner of the world that can resist the charms of a Frito-Lay potato chip.Frito-Lay is the biggest snack maker in America. owned by PepsiCo. And accounts for over half of the parent company’s $3 billion annual profits. But the U.S. snack food market is largely saturated, and to grow. the company has to look overseas.Its strategy rests on two beliefs: first a global product offers economies of scale with which local brands cannot compete. And second, consumers in the 21st century are drawn to “global” as a concept. ”Global” does not mean pr oducts that are consciously identified as American, but ones than consumes-especially youngpeople-see as part of a modem, innovative(创新的)world in which people are linked across cultures by shared beliefs and tastes. Potato chips are an American invention, but most Chinese, for instance, do not know than Frito-Lay is an American company. Instead, Riskey, the company’s research and development head, would hope they associate the brand with the new world of global communications and business. With brand perception a crucial factor, Riskey ordered a redesign of the Frito-Lay logo(标识).The logo, along with the company’s long-held marketing image of the “irresistibility” of its chips. would help facilitate the company’s global expansion.The executives acknowledge that they try to swing national eating habits to a food created in America, but they deny that amounts to economic imperialism. Rater, they see Frito-Lay as spreading the benefits of free enterprise across the world. “We’re making products in those countries, we’re adapting them t o the tastes of those countries, building businesses and employing people and changing lives,” said Steve Reinemund, PepsiCo’s chief executive.21.It is the belief of Frito-Lay’s head of global marking that_____.A) Potato chips can hardly be used as a weapon to dominate the world marketB) Their company must find new ways to promote domestic sales.C) The light golden color enhances the charm of their company’s potato chipsD) People the world over enjoy eating their company’s potato chips22.What do we learn about Frito-Lay from Paragraph 2?A) Its products use to be popular among overseas consumers.B) Its expansion has caused fierce competition in the snack marker.C) It gives half of its annual profits to its parent company.D) It needs to turn to the word market for development.23.One of the assumptions on which Frito-Lay bases its development strategy is that_____.A)consumers worldwide today are attracted by global brandsB)local brands cannot compete successfully with American brandsC)products suiting Chinese consumers’ needs bring more profitsD)products identified as American will have promising market value24.Why did Riskey have the Frito-Lay logo redesigned?A)To suit changing tastes of young consumers.B)To promote the company‘s strategy of globalization.C)To change the company’s long-held marketing image.D)To compete with other American chip producers.25.Frito-Lay‘s executives claim that the promoting of American food in the international market_____.A)won‘t affect the eating habits of the local peopleB)will lead to economic imperialismC)will be in the interest of the local peopleD)won’t spoil the taste of their chipsPassage TwoQuestion 26 to 30 are based on the following passage.In communities north of Denver, residents are pitching in to help teachers and administrators as the Vrain school District tries to solve a $13.8 million budget shortage blamed onmismanagement. ”We’re worried about our teachers and principals, and we really don’t want to lose them because of this,” one parent sail. “If we can help ease their financial burden, we will. ”Teachers are grateful, but know it may be years before the district is solvent(有综合能力的). They feel really good about the parent support, but they realize it’s impossible for then to solve this problem.The 22,000-student district discovered the shortage last month. “It’s extraordinary. Nobody would have imagined something happening like this at this level,” said State Treasurer Mike Coffman. Coffman and district officials last week agreed on a state emergency plan freeing yp a $9.8 million loan that enabled the payroll(工资单) to be met for 2,700 teachers and staff in time for the holidays. District officials also took $1.7 million from student-activity accounts its 38schools.At Coffman’s request, the District Attorney has begun investigating the district’s finances. Cof fman says he wants to know whether district officials hid the budget shortage until after the November election., when voters approved a $212 million bond issue for schools. In Frederick, students’ parents are buying classroom supplies and offering to pay for groceries and utilities to keep first-year teachers and principals in their jobs.Some $36,000 has been raised in donations from Safeway. A Chevrolet dealership donated $10,000 and forgave the district’s $10,750 bill for renting the driver educating cars. IBM contributed 4,500 packs of paper.“We employ thousands of people in this community,” said Mitch Carson, a hospital chief executive, who helped raise funds. “We have children in the school, and we see how they could be affected.”At Creek High School, three students started a website that displays newspaper articles, district information and an email forum(论坛)。
农业大学大学计算机基础第二学期期末考试试卷8及答案
农业大学期末考试试卷（A卷）2005学年第2学期考试科目：大学计算机基础考试类型：（闭卷）考试时间：120分钟学号姓名年级专业考生注意：1、答案必须分别写在“机读卡”和“答题卡”上，写在试卷上不得分。
2、必须在机读卡和答题卡上正确填写班级、学号、姓名等内容，否则没有考试成绩。
3、在机读卡的学生代号区只填写学号后10位。
一、判断题（在机读卡上答题，正确选A，错误选B，每小题0.5分，共20分）1.被称作“裸机”的计算机是指没有硬盘的微机。
2.对软盘进行全面格式化也不一定能消除软盘上的计算机病毒。
3.计算机网络协议是一组通信规则或约定。
4.网桥可用于将局域网连接到互联网上。
5.目前普遍使用的微型计算机所采用的逻辑元件是大规模和超大规模集成电路。
6.操作系统的所有程序都必须常驻内存。
7.所谓存储系统的层次结构，是把各种不同存储容量、不同存储速度的存储设备，按照一定的体系结构组织起来，是将所存放的程序和数据按层次分布在各存储设备中。
8.光盘存储器是利用涂抹在盘面上的磁性材料作为信息载体的。
9.计算机能够直接识别和处理的语言是机器语言。
10.逻辑运算是指对因果关系进行分析的一种运算，运算是按位进行的。
11.计算机的硬件和软件是互相依存、互相支持的，硬件的某些功能可以用软件来完成，而软件的某些功能也可以用硬件来实现。
12.EGA、VGA、SVGA标志着显示器的不同规格和性能。
13.外存储器（如磁盘）上的信息可以直接进入CPU被处理。
14.CAD是计算机的一个主要应用领域，它的含义是计算机辅助设计。
15.在数据的浮点表示法中，表示有效数字的是基数。
16.程序是动态的，进程是静态的。
17.计算机信息系统安全不包括人员安全。
18.在计算机中，所有的信息如数字、符号、以及图形等都是用电子元件的不同状态表示的。
19.二进制的加法和减法运算是按位进行的。
20.目前C/S模式已经完全将B/S模式取代，这也预示了网络时代的到来。
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32.欲使用8253的计数通道产生周期为1ms的连续脉冲,设8253的CLK脉
冲为5MHz,端口地址为10H--13H,试求： ①计算计数通道1的计数初值; ②写出对8253计数通道1的初始化程序.
共 5 页；第 3 页
班
五、程序分析题（本大题共3小题,每小题3,共9分）
级：
学 33.程序段如下，运行后，AH= 0 ，AL= 9
XOR AL，AL
号：
MOV AH，AL
姓
ADD AH，9
名：
JZ NEXT
XCHG AH，AL
JMP K1
NEXT： MOV AH，0FFH
K1： HLT
34.有程序段如下：
MOV AL，DAT
MOV DAT+2，AL
AND DAT+2，0FH
哈尔滨工程大学试卷 考试科目: 微机原理及应用技术（A卷）
（注：卷面满分90分，所有答案必须写在答题纸上）
一、单项选择题（每小题1分，共20分）
1.十进制数－80用16位补码表示是（ ）。
A. F080H B.8080H C.FF88H D.FFB0H
2.在机器内部操作中，CPU与存贮器之间信息交换使用的是（
操作
5.下列指令执行后能使BX中数据必为奇数的是( )。
A.XOR BX,01H B.OR BX,01H
C.AND BX,01H D.TEST BX,01H
6.设CL=05H,要获得CL=0AH,可选用的指令是( )。
A.XOR CL,0FH B. NOT CL
C.OR CL,0AH D.AND CL,0FH
7.下列语句中能与“DA1 DB 32H,34H”语句等效的是( )。
A. MOV DA1,32H
B. MOV DA1,32
MOV DA1+1,34H
MOV DA1+1,34
C.MOV WORD PTR DA1,3234H D.MOV WORD PTR
DA1,’24’
8.设SP=50H,执行段间返回指令RET 后,寄存器SP的内容是(C.
21.8086响应INTR请求需要执行两个总线响应周期( )。 22.8086访问一个字节单元和访问一个字单元,只需要一个总线
周期( )。 23.8255A的C口置位/复位控制字是写入C口的端口地址( )。 24.8253三个计数通道结构完全相同，且独立工作( )。 25.读取8253内的计数值时,必须先用锁存命令将当前计数值锁 存在输出锁存器
）。
A.逻辑地址 B.物理地址 C.有效地址 D.相对地址
3.假设VAR为变量，指令MOV BX，OFFSET VAR源操作数的寻
址方式是（ ）
A.直接寻址 B.间接寻址 C.立即数寻址 D.存贮器寻址
4.下列操作中，允许段超越的是（ ）。
A.取指令 B.存目的串 C.以BP为基础存取操作数 D.堆栈
)。
A.5AH B.5CH C.54H D.44H
9.使用DOS功能调用时,子程序编号应放在( B )寄存器中。
9.使用DOS功能调用时,子程序编号应放在( B )寄存器中。 A.AL B.AH C.AX D.任意指定
10.寄存器BX和DX中存放有32位二进制数,其中BX中放高16位, 下列程序段完成对这32位数扩大4倍的功能,那么该程序段中 方框里应填的语句是( )。
28.8086与8088CPU的主要区别有哪些? 29.8086的复位信号是什么?8086CPU复位后,程序从哪个物理地址开始 运行？ 30.入栈操作时，说明堆栈指针寄存器SP的变化情况?
四、简单分析设计题（本大题共2题,每题 9 分,共 18分）
31.有一个2732EPROM（4KX8）芯片的译码电路如下图所示,试求: 1 计算2732芯片的存储容量；
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MOV CX，2 LOP：SHL DX，1
LOOP LOP A.ROL BX,1 B.ROR BX,1 C.RCL BX,1 D.RCR BX,1 11.8086CPU在进行I/O读操作时,必须是( A )。 A.0 0 B.0 1 C. 1 0 D.1 1 12.8086执行一个总线周期最多可传送( B )字节。 A.1个 B.2个 C.3个 D.4个 13.8086/8088执行一个总线周期是在( )之后插入TW。 A.T1 B.T2 C.T3 D.T4 14.若用存贮芯片(32K×1)构成8086的存贮器系统至少要用( )。 A.8片 B.16片 C.32片 D.64片 15.除法出错是属于( )中断。 A.线路故障 B.内部中断 C.INTO D.单步中断 16.8255A工作于方式1输出方式,A口/B口与外设之间的控制状 态联络信号是( C )。 A.与IBF B.IBF与 C. D. 17.8086系统可寻址I/O端口的最大地址为( )。 A.0FFH B.0FFFH C.0FFFFH D.10000H 18.下列第( D )条是合法的访问I/O端口指令。 A.IN AL,100H B.IN AL,BX C.IN AL,BL D.IN AL,DX
② 程序段功能不变的情况下，REP MOVSB指令可否用下面
两个指令替代：
ቤተ መጻሕፍቲ ባይዱLOP：MOVSB
LOOP LOP
六、编制程序（8分）
有一首地址为BUF的字数组，试编写完整程序，求该数组 正数之和，结果存于TOTAL单元中（假设正数之和<32767）。
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七、8255接口应用（10分） CPU通过8255同开关K0～K3和LED显示器的接口见下图，
MOV CL，4
SHR AL，CL
MOV DAT+1，AL
试回答：
①上述程序段的功能？
②如在DAT单元中存放的是0ABH，上述程序段运行后，
DAT+1和DAT+2
单元中内容是什么？
① 拆字程序：将DAT单元的内容拆成两部分，分别存入相邻单
元中，高4位存入DAT+1单元，低4位存入DAT+2单元。
② (DAT+1)=0AH, (DAT+2)=0BH
OL中( )。
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学号： 姓名： 班级：
装订线
三、简答题（本大题共5小题,每小题3分,共15分）
26. STRING DB ’AB’,0, 0, ’CD ’, 0, 0, ’EF’, 0 , 0 请用DW伪指令改写上述数据定义语句,要求改写后,保持内存单元 中内容不变。
27.在指令系统中,段内、段间返回均用RET指令,试回答： ①执行段内返回RET指令时,执行的操作是： ②执行段间返回RET指令时,执行的操作是：
LOP：IN AL，81H AND AL，0FH MOV BX，OFFSET SEGCODE XLAT OUT 80H，AL JMP LOP JMP LOP
姓名： 学号： 班级： 姓名： 班级： 学号： 学号： 班级：
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19.普通中断结束EOI命令适用于( )方式中的中断命令。 A.完全嵌套 B.自动循环 C.特殊循环 D.特殊屏蔽
20.若每输入n个CLK脉冲,在OUT端就可输出一个宽度为一个 CLK周期的负脉冲,则8253应工作于方式( 2 )。 A.0 B.1 C.2 D.3
二、判断说明题（本大题共5个小题,每个小题2分,共10分） 判断下列各题正误，正者在括号内打√误者在括号内打×,并 说明理由。
开关设置的二进制信息由B口输入，经程序转换成对应的七段 LED段码后，通过A口输出，由七段LED显示开关二进制的状 态值，试编写其控制程序（设8255的端口地址为80H～83H）。
注：若B口读入的值为0000，则LED显示器将显示0；以此类推， 若B口读入的值为1111，则LED显示器将显示F。
SEGCODE DB 0C0H，0F9H，A4H，B0H，…，8EH ………… MOV AL，10000010B OUT 83H，AL
35.有程序段如下： X DW 0123H,，2A3EH,，89DFH
CUNT EQU $–X
Y DB CUNT DUP(0)
LEA SI，X
LEA DI，Y
MOV CX，CUNT1试上回述答程：序执行
CLD
后，Y数据区各 字节单元中的内
REP MIVSB
容。 Y数据区各字节单
元中的内容是：
23H, 01H,3EH,2AH,0DFH,89H