2008低频卷B 参考答案

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2008年普通高等学校招生全国统一考试广东卷B

2008年普通高等学校招生全国统一考试广东卷B

2008年普通高等学校招生全国统一考试(广东卷B)语文本试卷共8页,24小题,满分150分。

考试用时150分钟。

注意事项:1、答卷前,考生务必用黑色字迹的钢笔或签字笔将自己的姓名和考生号、试室号、座位号填写在答题卡上。

用2B铅笔将试卷类型(B)填涂在答题卡相应位置上。

将条形码横贴在答题卡右上角“条形码粘贴处”。

2、选择题每小题选出答案后,用2B铅笔把答题卡上对应题目选项的答案信息点涂黑;如需改动,用橡皮擦干净后,再选涂其他答案。

答案不能答在试卷上。

3、非选择题必须用黑色字迹的钢笔或签字笔作答,答案必须写在答题卡各题目指定区域内相应位置上;如需改动,先划掉原来的答案,然后再写上新的答案;不准使用铅笔和涂改液。

不按以上要求作答的答案无效。

4、作答选做题时,请先用2B铅笔填涂选做题的题组号对应的信息点,再作答,漏涂、错涂、多涂的,答案无效。

5、考生必须保持答题卡的整洁。

考试结束后,将试卷和答题卡一并交回。

一、本大题4小题,每小题3分,共12分。

1、下列词语中加点的字,每对的读音都不相同的一项是A、滋润/蕴含赡养/瞻仰调试/调和B、对峙/嗜好竣工/英俊强迫/倔强C、造诣/逃逸堤岸/提拔抹黑/抹布D、湖畔/装扮怄气/枢纽阻塞/边塞2、下面语段中划线的成语,使用恰当的一项是公共汽车正在行驶中,前面一骑摩托车的男子突然变向横穿马路,眼看两车就要相撞。

在这千钧一发之际,只听“嘎一一”的一声,公共汽车司机紧急刹车,避免了一场车祸的发生。

车上乘客目睹了这扣人心弦的一幕,议论纷纷,怨声载道。

那翻倒在地的骑摩托车男子迅速爬起来,一阵东张西望之后,未见交警身影,继而义无反顾,翻身上车,扬长而去。

司机不禁怒形于色,大声斥责那违反交通规则的男子。

A、扣人心弦B、怨声载道C、义无反顾D、怒形于色3、下列句子中,没有语病的一项是A、对这部小说的人物塑造,作者没有很好地深入生活、体验生活,凭主观想象加了一些不恰当的情节,反而大大减弱了作品的感染力。

B专家点评2008年高考英语试题北京卷 B

B专家点评2008年高考英语试题北京卷 B

专家点评2008年高考英语试题[北京卷]听力我们先对07和08两年的听力考试做个简单对比:1. 07年的听力考试的总时长是20分45秒,08年的总时长是21分27秒,比去年多了42秒。

2. 朗读者依然是:Paul Demman(男)和Alexandra Ireland(女),Paul是伦敦人,曾经在BBC有过播音工作的经历。

Alexandra从小在伯明翰长大,也接受过专业的播音训练,《新东方高考英语听力》这本书的所有联系都是这两人朗读的。

3. 从北京开始单独命题以来第二节就是6段对话和独白(全国和地方为5段)。

07只有一段独白,出现在第二节的最后一篇,问了三个问题。

08年有两段独白,出现在第二节的第三篇和第四篇,总共问了5个问题。

4. 数字听力题07年考了两道,短对话一道,长对话一道,都是计算类的。

08年北京卷考了三道数字听力题,短对话同样只考了一道,长对话两道,三道题目中一道是计算类的,两道是辨识类的。

下面具体分析一下08年北京卷的听力考试题目:先看5道短对话,短对话中依旧关注细节信息,不需要理解。

第二题接受/拒绝对方邀请和第三题的数字计算和在新东方高考特训的听力课上都做过专题讲解,只要不出现设备意外和重大情绪变化,这5道题对学生没有任何挑战。

还是在课上我经常强调的一点:“短对话第一听信息,尤其关注第二个人的回应,第二听语气,即使重要信息漏了,通过态度把握也能推出正确答案。

”再来关注一下第二节的6篇材料。

比去年强多了,实用性明显加强。

第一篇数字听力还是老套路,给了N多干扰信息,至少出现了10个数字信息。

数字题就是出现的东西越多题目越简单,不会再去绕弯了,直接对号入座。

“重要的信息必然会被重复。

”本对话中的两个考点在听力原文中均有一次重复。

再次提醒以后参加高考听力的同学关于数字题目的十字箴言“要点笔录,把握运算关系”。

第二段长对话出的有学问啊,刚刚听完一堆数字头昏脑胀的,人性化的命题组老师赶紧让大家轻松一下。

低频典型例题部分参考答案

低频典型例题部分参考答案

复习题一、填空:1.为使BJT发射区发射电子,集电区收集电子,必须具备的条件是(发射极正偏,集电极反偏)。

2.N型半导体是在纯硅或锗中加入(磷(+5))元素物质后形成的杂质半导体。

3.差分放大电路对(差模)信号有放大作用,对(共模)信号起到抑制作用。

4.在电容滤波和电感滤波中,(电感)滤波适用于大电流负载,(电容)滤波的直流输出电压高。

5.集成运放主要包括输入级、( 中间级)、( 输出级)和 ( 偏置)电路。

其中输入级一般采用( 差分放大)电路。

6.为稳定放大器的静态工作点,应在放大电路中引入(直流负)反馈,为稳定放大器的输出电压应引入(电压负)反馈。

7.甲类功放电路相比,乙类互补对称功率放大电路的优点是(效率高,管耗小),其最高效率可达到( 78.5% ),但容易产生(交越)失真。

8.集成运算放大器是一种采用(直接)耦合方式的多级放大电路,它的输入级常采用差分电路形式,其作用主要是为了克服(零漂、温漂)。

9.若放大器输入信号电压为1mV,输出电压为1V,加入负反馈后,为达到同样输出需要的输入信号为10mV,该电路的反馈深度为( 10 )。

10.产生1Hz~1MHz范围内的低频信号一般采用( RC )振荡器,而产生1MHz以上的高频信号一般采用( LC )振荡器。

11.半导体二极管具有(单向导电)作用,稳压二极管用作稳压元件时工作在(反向击穿)状态。

12.晶体三极管是一种(电流控制电流)控制型器件,当工作在饱和区时应使其发射结(正偏)集电结(反偏),而场效应管是一种( 电压控制电流 ) 控制型器件。

13.集成电路运算放大器是一种高电压增益、高输入电阻、(低)输出电阻的(直接)耦合方式的多级放大电路。

14.差分放大电路有四种输入-输出方式,其差模电压增益大小与输(出)有关而与输(入)方式无关。

15.在放大电路中引入(直流负)反馈可以稳定放大电路的静态工作点,。

16.三种组态的放大电路中(共发射极组态、共集电极组态、共基极组态)输入电阻最小的是( 共基极 )电路。

2008年度全国职称外语等级考试综合类B级试卷

2008年度全国职称外语等级考试综合类B级试卷

2008年度全国职称外语等级考试试卷综合类B级第1部分:词汇选项(第1—15题,每题1分,共15分)下面每个句子中均有1个词或短语划有底横线,请为每处划线部分确定1个意义最为接近的选项。

1. She found me very dull.A. dirty B sleepy C. lazy D. boring2. The President made a brief visit to Beijing.A shortB workingC formalD secret3. He was persuaded to give up the idea.A mentionB acceptC considerD drop4. Jack consumes a pound of cheese a day.A eatsB drinkC buysD produces5. Mary just told US a very fascinating story.A strangeB frighteningC difficultD interesting6. It's a gorgeous day anyway.A lovelyB coldC normalD rainy7. Her life is becoming more diverse.A generousB humorousC variedD romantic8. Foreign military aid was prolonging the war.A broadeningB worseningC extendingD accelerating9. She was unwilling to go but she had no choiceA unableB indecisiveC readyD reluctantl0. She is slender, with delicate wrists and ankles.A .sickB weakC slimD pale11. With immense relief, I stopped running.A .someB enormousC littleD extensive12. The scientists began to accumulate data.A . collectB handleC analyzeD investigate13. Jack eventually overtook the last truck.A. hit B passed C reached D led14. Sometimes it is advisable to book hotels in advance.A. possible B profitable C easy D wise15. The reason for their unusual behavior remains a puzzle.A. fact B mystery C statement D game第3部分:概括大意与完成句子(第23~30题, 每题1分, 共8分)下面的短文后有2项测试任务:(1)第23~26题要求从所给的6个选项中为第2-5段每段选择1个最佳标题;(2)第27-30题要求从所给的6个选项中为每个句子确定1个最佳选项。

2008年6月PRETCO考试B级真题试卷

2008年6月PRETCO考试B级真题试卷

2008年6月PRETCO考试B级真题试卷Part I Listening ComprehensionDirections: This part is to test your listening ability. It consists of 3 sections.Section ADirections: This section is to test your ability to give proper responses. There are 5 recorded questions in it. After each question, there is a pause. The questions will be spoken two times. When you hear a question, you should decide on the correct answer from the 4 choices marked A), B), C) and D) given in your test paper. Then you should mark the corresponding letter on the Answer Sheet with a single line through the center.Now the test will begin.1. A) A good idea.B) No problem.C) My pleasure.D) Of course not.2. A)B) In East Europe.C) In the countryside.D) After December 24.3. A) It was impossible.B) It was wonderful.C) So do I.D) I see.4. A) You are welcome.B) Sure. Where?C) How are you?D) Long time no see.5. A) Glad to meet you.B) I’m not sure.C) Go ahead.D) No, thanks.Section B6. A) Tea.B) Coffee.C) Water.D) Beer.7. A) He can’t call a taxi for her.B) There is no taxi.C) The traffic is heavy.D) The line is busy.8. A) Husband and wife.B) Patient and doctor.C) Teacher and student.D) Manager and secretary.9. A) On foot.B) By bus.C) By car.D) By bike.10. A) Buy a new computer.B) Try the computer again.C) Use her computer.D) Have .Section CDirections: In this section you will hear a recorded short passage. The passage is printed in the test paper, but with some words or phrases missing. The passage will be read three times. During the second reading, you are required to put the missing words or phrases on the Answer Sheet in order of the numbered blanks according to what you hear. The third reading is for you to check your writing. Now the passage will begin.Today more and more people begin to understand that study does not come to an end with school graduation. Education is not just a college -11- ; it is life itself. Many people are notinterested in studying at a college, and they are interested in -12- of learning. They may go to a -13- in their own field; they may improve their -14- skills by following television courses. They certainly more or learn more, they can get -15- jobs or earn more money. 答案:11.degree 12.other kinds 13.training class 14.work 15.betterPart II —— Vocabulary & StructureDirections: This part is to test your ability to use words and phrases correctly to construct meaningful and grammatically correct sentences. It consists of 2 sections.Section ADirections: There are 10 incomplete statements here. You are required to complete each statement by choosing the appropriate answer from the 4 choices marked A), B), C) and D). You should mark the corresponding letter on the Answer Sheet with a single line through the center.16. Please keep a detailed ________ of the work that you have done.A) paperB) ideaC) exerciseD) record17. ________ our great surprise, speak four foreign languages.A) OfB) InC) ToD) For18. The department manager ________ a new plan to promote sales at the meeting.A) took awayB) put forwardC) looked afterD) got on19. What he told me to do was ________ I should get fully prepared before the interview.A) whatB) ifC) whichD) that20. When dealing with a ________ task, Alice always asks for help from people around her.A) difficultB) wonderfulC) funnyD) simple21. Location is the first thing customers consider when ________ to buy a house.A) planningB) plannedC) to planD) having planned22. Soft drink sales in this city have ________ by 8% compared with last year.A) pickedB) movedC) increasedD) pushed23. If I hadn’t attended an important meeting yesterday, I ________ to see you.A) will have comeB) would have comeC) have comeD) had come24. To obtain a visa to enter that country for the first time, you need to apply ________.A) in partB) in personC) in turnD) in place25. car was put into production in 2007, ________ helped to provide another 1400 jobs.A) thatB) whenC) whatD) whichSection BDirections: There are also 10 incomplete statements here. You should fill in each blank with the proper form of the word given in brackets. Write the word or words in the corresponding space on the Answer Sheet.26. My impression is that the sales of this company have (great) ________ increased this year.27. This picture (take) ________ by a young reporter in Beijing last month.28. Tom has made the (decide) ________ to apply for a job in the company.29. No reader is allowed (take) _________ any reference book out of the reading room.30. Although you may not (success) ________ in the beginning, you should keep on trying.31. Because light travels (fast) ________ than sound, lightning is seen before thunder (雷) is heard.32. The doctor recommended that Mary (start) ________ the health program as soon as possible.33. It took me several weeks to get used to (drive) ________ on the left side of the road in London.34. This medicine is highly (effect) _______ in treating skin cancer if it is applied early enough.35. Now who are working at home on the Internet (be) ________ still very small.答案:26.greatly 27.was taken 28.decision 29.to take 30.succeed31.faster 32.(should)start 33.driving 34.effective 35.isPart III Reading ComprehensionDirections: This part is to test your reading ability. There are 5 tasks for you to fulfill. You should read the reading materials carefully and do the tasks as you are instructed.Task 1Directions: After reading the following passage, you will find 5 questions or unfinished statements, numbered 36 to 40. For each question or statement there are 4 choices marked A), B), C) and D). You should make the correct choice and mark the correspondingletter on the Answer Sheet with a single line through the center.Falls are the number one cause of death to old people at home. Most old people can live safely at home if they make a few changes. Falls are common as people are getting older. Up to half of home accidents could be prevented simple changes. Here are a few suggestions:Mark trouble spots with bright tapes. The first and last steps on stairs are usually high-risk accident areas. Applying bright tapes and using bright light in these areas would make these spots easier to see.Put grab bars (扶手) in the bathroom. A large number of falls occur in the bathroom. This is unfortunate (不幸的) because it’s easy to make the area safe from accidents. Putting grab bars in the bathroom gives people something to hang on to.Invest in a personal alarm. A personal alarm can be started if a person falls or otherwise gets in trouble. With the push of a button, the alarm automatically sends a signal, which gets someone to call and see if the person needs help.36. By making some very simple changes at home, old people ________.A) are free from home accidentsB) can improve their healthC) are likely to live longerD) can live more safely37. Last steps on stairs may become a high-risk accident area if they are ________.A) not painted in a different colorB) not marked with bright tapesC) fixed with grab barsD) very brightly lit38. Falls in the bathroom are considered to be unfortunate because ________.A) they can easily be avoidedB) old people seldom fall in bathroomsC) grab bars do not help to prevent fallsD) bathroom accidents are difficult to prevent39. A personal alarm is designed for old people to ________.A) detect safety conditions at homeB) avoid falls in the bathroomC) send out signals for helpD) make phone calls easily40. The purpose of this passage is to tell people that ________.A) most old people die from accidents at homeB) up to half of home accidents could be preventedC) falls at home can be avoided by taking some simple measuresD) protection be the first concern for the publicTask 2Directions: This task is the same as Task 1. The 5 questions or unfinished statements are numbered 41 to 45.We have created a special rate that will let you travel actually thousands of miles on your vacation at no extra cost.In most of our US and Canadian offices, we’ll rent you cars of high quality for seven days for $99.You can drive as far as you like without paying us a penny over the $99 as long as you return the car to the city from which you rented it. Insurance (保险) is included, gas is not.If you rent the car in Florida or in California, the rate is the same, but you can return the car to any city in the state.If you’d like some suggestions on what to do with the car once you’ve got it, we have driving and touring guides for almost every part of the country. No matter which rate you choose, the company comes at no extra cost. You don’t just rent a car. You rent a company!41. According to the advertisement, $99 is the rate offered for ________.A) traveling a limited distanceB) renting a car for seven daysC) hiring a driving guideD) driving within a state42. Which of the the car-renting rate?A) Gas used.B) Car repairs.C) The hotel charge.D) Insurance fee.43. The car-renting rate remains $99 if you ________.A) return the car to where you rent itB) drive within the same cityC) buy the insuranceD) pay for the gas44. The last sentence of the passage “You rent a company” means that ________.A) you have to be responsible for the companyB) you should obey the rules set by the companyC) you can enjoy all-rounds of this companyD) you may choose the best car from the company45. The purpose of the passage is to advertise ________.A) car-rentings in the USB) a special rate of car-rentingC) the advantages of car-rentingD) a US car-renting companyPart IV Translation -- English into ChineseDirections: This part, numbered 61 to 65, is to test your ability to translate English into Chinese. Each of the four sentences (N0.61 to No.64) is followed by four choices of suggested translation marked A), B), C) and D). Make the best choice and write the corresponding letter on the Answer Sheet. Write your translation of the paragraph (No.65) in the corresponding space on the Translation/Composition Sheet.61. Two a ssistants reporters’ names when they arrive at the press conference.A) 两位助手要求记者在到达新闻发布会时通报他们的。

2008听力试题--BJ卷

2008听力试题--BJ卷

2008年普通高等学校招生全国统一考试(北京卷)听力试题部分第一部分听力理解(共两节,满分30分)第一节(共5小题;每小题1.5分,满分7.5分)听下面5段话。

每段对话后有一道小题,从每题所给的A、B、C三个选项中选出最佳选项。

听完每段对话后,你将有10秒钟的时间来回答有关小题和阅读下一小题。

每段对话你将听一遍。

1.What did the man win in his dream?A.A holiday.B.A new car.C.Some money.2.Will the woman come to the party?A.Maybe. B.No. C.Certainly.3.How long has the woman been an author?A.About 30 years.B.About 40 years.C.About 70 years.4.What does the woman want?A.A radio.B.Some pens.C.Some batteries.5.What is the woman doing?A.Asking for information.B.Asking for an apology.C.Asking for help.第二节(共15小题;每小题1.5分,共22.5分)听下面6段对话或独白。

每段对话或独白后有几道小题,从每题所给的A、B、C三个选项中选出最佳选项。

听每段对话或独白前,你将有5秒钟的时间阅读每小题。

听完后,每小题将给出5秒钟的作答时间。

每段对话或独白你将听两遍。

听第6段材料,回答第6,7题。

6.How many coats does the woman want?A.25. B.30. C.50.7.What is the order number for gloves?A.P25G5. B.P26T5. C.P28D5.听第7段材料,回答第8,9题。

2008年12月大学英语三级B真题及答案

2008年12月大学英语三级B真题及答案

2008年12月大学英语三级B真题及答案2008年12月大学英语三级B真题及答案Part I Listening ComprehensionDirections: This part is to test your listening ability. It consists of 3 sections. Section ADirections: This section is to test your ability to give proper responses. There are 5 recorded questions in it. After each question, there is a pause. The questions will be spoken two times. When you hear a question, you should decide on the correct answer from the 4 choices marked A), B), C) and D) given in your test paper. Then you should mark the corresponding letter on the Answer Sheet with a single line through the center.Now the test will begin.1. A) Thank you.B) With pleasure.C) Oh, yes.D) Here you are.2. A)B) Far from here.C) Five people.D) One hundred dollars.3. A) Please sit down.B) Take it easy.C) I’m OK.D) Yes, of course.4. A) He’s a nice person.B) I work very hard.C) You’re welcome.D) Certainly not.5. A) It’s far away.B) It’s rather warm.C) I hope so.D) I’m afraid I can’t.Section BDirections: This section is to test your ability to understand short dialogues. There are 5 recorded dialogues in it. After each dialogue, there is a recordedquestion. Both the dialogues and questions will be spoken two times. When you hear a question, you should decide on the correct answer from the 4 choices marked A), B), C) and D) given in your test paper. Then you should mark the corresponding letter on the Answer Sheet with a single line through the center.6. A) From his friend.B) From his teacher.C) From his boss.D) From his brother.7. A) Attend a meeting.B) Hold a party.C) .D) Meet a friend.8. A) In the meeting room.B) In her office.C) At home.D) At the bank.9. A) It’s very boring.B) That’s to o busy.C) She likes it very much.D) She’s going to give it up.10. A) An engineer.B) A doctor.C) A salesman.D) A secretary.Section CDirections: In this section you will hear a recorded short passage. The passage is printed in the test paper, but with some words or phrases missing. The passage will be read three times. During the second reading, you are required to put the missing words or phrases on the Answer Sheet in order of the numbered blanks according to what you hear. The third reading is for you to check your writing. Now the passage will begin.People visit other countries for many reasons. Some travel -11- ; others travel to visit interesting places. Whenever you go, for whatever reason, it is important to be -12- . A tourist can draw a lot of attention from local people. Although most of the people you meet are friendly and welcoming, sometimes there are dangers. -13- , your money or passport might be stolen. Just as in your home country, you meet to be friendly and -14- . It is important to prepare your trip in advance, and -15- be careful while you are traveling.答案:1-5:CADAB 6-10:DDBCA11.no business 12.safe 13.For example 14.helpful 15.alwaysPart II Vocabulary & StructureDirections: This part is to test your ability to use words and phrases correctly to construct meaningful and grammatically correct sentences. It consists of 2 sections.Section ADirections: There are 10 incomplete statements here. You are required to complete each statement by choosing the appropriate answer from the 4 choices marked A), B), C) and D).You should mark the corresponding letter on the Answer Sheet with a single line through the center.16. The newspaper ________ in the accident.A) saysB) talksC) callsD) asks17. She told us briefly about how they succeeded in ________ the new product.A) developB) to developC) developedD) developing18. The big IT company will ________ a new research center in the city.A) set upB) break upC) get upD) turn up19. I ________ at 130 kilometers per hour stopped me.A) had drivenB) have drivenC) driveD) was driving20. Information about the new system is easy to ________ on the Internet.A) likeB) goC) findD) open21. I’d like to introduce you ________ James Stewart, the new manager of our department.A) withB) toC) ofD) on22. We had a(n) ________ with him about this problem last night.A) explanationB) impressionC) exhibitionD) discussion23. We talked for more than three hours without ________ a cup of tea.A) to haveB) havingC) haveD) had24. They had to give up the plan because they had ________ money.A) come up toB) got along withC) run out ofD) taken charge of25. ________ she joined ago, she’s already been promoted twice.A) AlthoughB) BecauseC) IfD) WhenSection BDirections: There are also 10 incomplete statements here. You should fill in each blank with the proper form of the word given in brackets. Write the word or words in the corresponding space on the Answer Sheet.26. The new (nation) ________ museum will be open to the public next week.27. This question is (difficult) ________ than the one I have answered.28. The secretary has been working for the same (manage) ________ for over 5 years.29. The hotel, (build) _________ 100 years ago, still looks new.30. We are pleased to learn that that problem (solve) ________ at yesterday’s meeting.31. I want (point out) ________ that a decision about the matter must be made at once.32. Although she is young for the job, she is very (experience) ________.33. The new rules for environmental protection have been (wide) ________ accepted by the public.34. We demand that the tour guide (tell) ________ us immediately about any change in the schedule.35. Thank you for your letter of November 15, (invite) ________ us to the trade fair on December 10.答案:16-20:ADADC 21-25:BDBCA26.national 27.more difficult 28.manager 29.built 30.has been solved31.to point out 32.experienced 33.widely 34.tell/should tell 35.invitingPart III Reading ComprehensionDirections: This part is to test your reading ability. There are 5 tasks for you to fulfill. You should read the reading materials carefully and do the tasks as you are instructed.Task 1Directions: After reading the following passage, you will find 5 questions or unfinished statements, numbered 36 to 40. For each question or statement there are 4 choices marked A), B), C) and D). You should make the correct choice and mark the corresponding letter on the Answer Sheet with a single line through the center. Each time we produce a new English dictionary, our aim is always the same: what can we do to make the dictionary more helpful for students of English? As a result of our research with students and discussions with teachers, on providing more examples for this English dictionary.Examples help students to remember the word they have looked up in the dictionary because it is easier both to remember and to understand a word within a context (上下文). The examples also show that words are often used in many different contexts. For these reasons, we have included 40 per cent more examples in this new book. We edit all the examples to remove difficult words and to make sure they are easier to understand.We very much hope this new book will be of use not only to the students of English but also to the teachers.36. The aim of the author in producing this new dictionary is to ________.A) correct mistakes in the old dictionaryB) make it more helpful for studentsC) increase the number of wordsD) add pictures and photos37. A word is easier to remember and understand if it is________.A) included in a word listB) pronounced correctlyC) explained in EnglishD) used in a context38. What is special about this new dictionary?A) It is small and cheap.B) It has a larger vocabulary.C) It has 40% more examples.D) It is designed for students and teachers.39. The purpose of removing difficult words in the examples is to ________.A) understandB) provide more useful wordsC) introduce more contextsD) include more examples40. The passage is most probably taken from ________.A) a letter to the editorB) a comment on a novelC) an introduction to a dictionaryD) a news-report in the newspaperTask 2Directions: This task is the same as Task 1. The 5 questions or unfinished statements are numbered 41 to 45.What is the better way of staying away from the cold winter days? Come out to our Hall Markets in the beautiful countryside, full of color, fun, music and delicious food! With over 350 stalls (摊位) selling wonderful home-made and home-grown goods, this will surely be a great day out.The Hall Markets are held on the first Sunday of each monthfrom 10:00 am to 3:00 pm at Hall Village. They are operated by Hartley Lifecare Co. Ltd. All the income will go to help and support service for (残疾).Volunteers (志愿者) play an important part in the success and pleasant atmosphere at the Hall Markets. Hartley Lifecare is always grateful to have you serve as volunteers with the Hall Markets.If you are interested in being one of our volunteers and spending a few hours with us each month, please contact us during business hours on 6260 5555.41. According to the passage, the Hall Markets are held ________.A) in the countrysideB) to attract volunteersC) to promote winter salesD) by42. There are over 350 stalls in the Hall Markets that ________.A) are operated by the disabledB) offer free food to volunteersC) sell home-made goodsD) are open day and night43. The income made by the Hall Markets goes to ________.A) expand Hartley Lifecare Co. Ltd.B) support service for the disabledC) create more fun for customersD) develop local economy44. When are the Hall Markets open?A) The first Sunday of each month.B) Every day from 10 am to 3 pm.C) The first day of each month.D) Every weekend in winter.45. This passage is written for the purpose of inviting ________.A) touristsB) villagersC) businessmenD) volunteers答案:36-40:BDCAC 41-45:ACBADTask 3Directions: The following is a letter. After reading it, you should complete the information by filling in the blanks marked 46 through 50 in no more than 3 words in the table below.2 November, 2008Dear Dr. Yamata,The Association of Asian Economic Studies is pleased to invite you to be this year’s guest speaker at its annual international symposium (研讨会). The symposium will be held for 3 days from December 22nd to 24th, 2008. This year’s topic will be Economic Development in Asia. About 100 people from various countries symposium. They would be pleased to meet you and share their views with you.The Association will cover all the expenses of your trip to this symposium.As the program is to be announced on December 1st, 2008, will you kindly let us know before that time whether your busy schedule will allow you to attend our symposium? We are looking forward to your favorable reply.Yours sincerely,John SmithSecretary of Association of Asian Economic StudiesLetter of InvitationWriter of the letter: -46-Organizer of the Symposium: Association of -47-Guest speaker to be invited: Dr. YamataStarting date of the symposium: -48-Number of guests invited: about -49-Topic of the symposium: -50- in Asia答案:46.John Smith /doc/2d017212541810a6f524ccbff121dd3 6a22dc456.html n Economic 48.December 22nd,200849.one hundred 50.Economic DevelopmentTask 4Directions: The following is part of an index (索引). After reading it, you are required to find the items equivalent to (与…等同) those given in Chinese in the table below. Then you should put the corresponding letters in the brackets on the Answer Sheet, numbered 51 through 55.A —— after-sales serviceB —— business licenseC —— business riskD —— dead stockE —— department storeF —— import licenseG —— limited companyH —— net weightI —— packing chargeJ —— price tagK —— purchasing powerL ——seller’s marketM —— shipping dateN —— shopping rushO —— show windowP —— supermarketQ —— trade agreementExamples: ( D ) 滞销品 ( I ) 包装费51. ( ) 净重 ( ) 百货商店52. ( ) 购买力 ( ) 商业风险53. ( ) 超级市场 ( ) 卖方市场54. ( ) 有限公司 ( ) 售后服务55. ( ) 装船日期 ( ) 进口许可证答案:51.H,E 52.K,C 53.P,L 54.G,A 55.M,FTask 5Directions: The following is an advertisement. After reading it, you are required to complete the statements that follow the questions (No.56 to No.60). You should write your answers in no more than 3 words on the corresponding Answer Sheet. Yanton Playingfield CommitteeGrounds-person (场地管理员) WantedThe Yanton Playingfield years been fortunate to have Eddie Christiansen as grounds-person at its sports ground in Littlemarsh. However, after 10 years ofservice, Eddie has decided it’s time to retire in July. The committee wishes him the best for his retired life.However, this leaves us needing a new grounds-person. This role is part-time, averaging around 5 hours per week. The duties involve the mowing (除草), rolling, and trimming (修剪) of the field edges. Applicants (求职人) need to be able to drive and use for the above-mentioned duties.Applicants can either contact Hugh Morris, 42 Spencer Avenue, tel. 765-4943780, to discuss or register an interest in the position, or any member of the Playingfield Committee.56. Which organization is in need of a grounds-person?The _____________________________________________________.57. Why is a new grounds-person needed?Because the former grounds-person, Eddie Christiansen, has decided it’s time to _____________.58. What are the duties of a grounds-person?His duties involve the mowing, _________________ of the field edges.59. What should applicants be able to do?They should be able to _________ for the duties.60. Who is the contact person?____________________________________ or any committee member.答案:56.Yanton Playingfield Committee 57.retire 58.rolling,and trimming /doc/2d017212541810a6f524ccbff121dd3 6a22dc456.html e 60.Hugh MorrisPart IV Translation —— English into ChineseDirections: This part, numbered 61 to 65, is to test your ability to translate English into Chinese. Each of the four sentences (N0.61 to No.64) is followed by four choices of suggested translation marked A), B), C) and D). Make the best choice and write the corresponding letter on the Answer Sheet. Write your translation of the paragraph (No.65) in the corresponding space on the Translation/Composition Sheet.61. Seldom can people on the front page of this popular local newspaper.A) 人们不会在这份地方报纸前几页上寻找重要的国际新闻。

08级汽车专业英语试卷B(答案)2

08级汽车专业英语试卷B(答案)2

一、V ocabulary and Phrase(15道小题,每小题1分,共15分)1.Power Train: 传动系统2.Suspension: 悬架3.Cylinder: 气缸4.Transmission: 变速器5.Gasoline: 汽油机6.Final Drive: 主减速器,后桥7.Leaf Spring: 钢板弹簧8.Piston: 活塞9.TDC: 上止点10.Lubrication: 润滑11.Muffler: 消声器12.Planetary Gear: 行星齿轮13.Disc Brake: 盘式制动器14.Venting System: 通风系统15.Hybrid: 混合动力2ranslate the following sentences into Chinese(11小题,每小题5分,共55分)1.Today’s average car contains more than 15000 separate, individual parts thatmust work together. These parts can be grouped into four major categories: body,engine,chassis and electrical system.当今汽车的零部件总数通常多达15000种以上,它们协同工作。

汽车零部件分成4大主要类别:车身、发动机、地盘和电子电器系统。

2. Gasoline and Diesel are called heat engines, the burning fuel generates heat which causes the gas inside the cylinder to increase its pressure and supply power to rotate a shaft connected to the power train.汽油机和柴油机被称为热机,车用燃料产生热量使得气缸里的气体压力升高,为传动系统的曲轴提供动力。

2008 National English Contest for College Students(Level B - Sample)参考答案

2008 National English Contest for College Students(Level B - Sample)参考答案
Sheet with a single line through the centre.
1. M: I guess we'll have a hot summer again.
W: I know. Last summer was mild. Do you remember our first summer
7. W: I'm going to invite a few of my classmates to a party.
M: You can't invite just a few. The others will be angry.
Q: What does the man imply that the woman should do?
8. M: We'll have to hurry if we're going to be on time to get to the
airport. It's already eight thirty.
W: Well, it takes only half an hour to get to the airport, and
application?
M: Isn't there a photocopy machine in the post office that you
were just in?
Q: What does the man Imply?
was said. Both the conversation and the question will be read only
once. After each question, there will be a pause. During the pause,

2008年12月B级试题答案与精解

2008年12月B级试题答案与精解

2008年12月B级真题答案与精解Part I Listening ComprehensionSection A1. A2. B3. C4. B5. D1. Excuse me. Are you Mr. Smith from America?2. Mr. Johnson, when is the library open?3. It’s rather hot today. Would you please open the window?4. What do you think of your new boss?5. What’s the weather like in your city?Section B6. B7. D8. A9. D 10. C6. W: Are you coming for the basketball game?M: Y es, I got a ticket from my brother.Q: Where did the man get the ticket?7. M: Can you stay for dinner?W: I’d love to. But I have to go to meet a friend at the airport.Q: What’s the woman going to do?8. W: I’m here to see Miss Brown.M:Miss Brown? Er…, She is in her office.Q: Where is Miss Brown?9. M: Do you like your new job?W: Y es, I like it very much.Q: How does the woman feel about her new job?10. W: Did you work as a salesman in that company?M: No, I was an engineer.Q: What did the man do in that company?Section CPeople visit other countries for many reasons. Some travel on business; others travel to visit interesting places. Whenever you go, for whatever reason, it is important to be safe. A tourist can draw a lot of attention from local people. Although most of the people you meet are friendly and welcoming, sometimes there are dangers. For example, your money or passport might be stolen. Just as in your home country, do not expect everyone you meet to be friendly and helpful. It is important to prepare your trip in advance, and always be careful while you are traveling.Part II StructureSection A16. C 17.B 18. A 19. D 20. D21. A 22.C 23. D 24. A25. B16. [答案] C[译文]关于新系统的信息很容易在网上找到。

2008年江苏行政职业能力测验B卷真题【完整+答案+解析】

2008年江苏行政职业能力测验B卷真题【完整+答案+解析】

江苏省2008年考试录用公务员行政职业能力倾向测验(B类)试卷知觉速度与准确性测验答题说明与例题该部分的题目主要考测你对信息进行筛选,从几个同时性的信息中选择一定对象的能力。

总共题量为60道,包括三种类型,时限为10分钟。

第一类题目:要求你对照所给的几组符号,从中找出相同符合的个数,这个数目就是答案。

如果没有相同的符号,答案就是零。

【例题】1. 2 8 0 9 1 4 5 7 9 0A.0B.2C.3D.4正确答案为B。

两组中都有0,9两符号。

2. 了木本口天日本大子日太禾中夫A.0B.1C.2D.3正确答案为A。

三组中没有相同字符,其中两组中有相同符号的不算,如“日”。

第二类题目:先呈现一个数字区间表格,在随后题目中,每一道题都给出一个数字,要求考生将这一数字与表格中的数字区间进行比较,判断这一数字位于哪一数字区间,这一数字区间所在的标号字母即为正确答案。

【例题】请开始答题:1. 49872. 98753. 23454. 75215. 3721正确答案分别为:1.D;2.C;3.A;4.B;5.A。

第三类题目:先呈现一个数字与符号的对应表(图例),其中每个数字都有一个图形与其相对应。

另外又给出了一个数字表,在随后的题目,要求考生根据数字与图形的对应替代关系,回答所提出的问题。

【例题】数字表(表中含数字为1至9的自然数)请开始答题:1. 数字表中对应W的数字有几个:A.2B.3C.4D.72. 数字表中第8列的4个数字对应的符号分别是:A.W☆△十B.W⊙▽◇C.十☆WMD.M☆⊙△3. 数字表中第2行中缺矢的两个数字对应的符号为:A.十◇B.十▽C.◇△D.十△4. 数字表中代表的数字在哪几列:A.2,4,6,7B.2,4,7C.4,7,7D.2,4,7,85. 数字表中第4行中缺矢的数字对应的符号为:A.◇B.WC.十D.△正确答案分别为:1.B,2.C,3.D,4.A,5.C。

第一部分知觉速度与准确性(共60题,时限10分钟)一、同符查找(1—35题):1. 36 9851 257 630 2 604 798A.0B.1C.2D.32. 179 465 21 970 3 491 287A.1B.2C.3D.43. 4 689 25 706 413 35 784 210A.3B.2C.1D.04. RSNOP NGBSTV ANFJKLTA.1B.2C.3D.45. XZWN2S M3PTZE 3MKQNCA.3B.2C.1D.06. 人来住天间下回学同大未往回字上面A.1B.2C.3D.47. AKW5f6B SpfVMZBQ 6MLQfczA.0B.1C.2D.38. 无可非会去三日相人天可去二句A.0B.1C.2D.39. 6 514 930 176 294 93 086 471A.4B.3C.2D.110. 47%百$*=M #68白?SF*4LVA.3B.2C.1D.011. 分行汉代典书风本舆浅行云会月12. auefgαLo enfjk△αǔov rbfdmneα*oA.1B.2C.3D.413. 必注未轻源乏往末原较之多言以A.3B.2C.1D.014. 赛马^¥尺V∴MuB ∵WǔR乌尸力塞¥∠A.4B.3C.2D.115. 匚大巛σθβ△一T 工幺XTQθ▽巜A.4B.3C.2D.116. 表厚物题中道哪字标正特造句语标提问A.0B.1C.2D.317. UMCFJKBZ FDPBLYTCE MFKUTA.1B.2C.3D.418. r+RceαQfθb βαfB土euθA.1B.2C.3D.419.17N34fd 269Mbdq 3BPdvjlmbA.1B.2C.3D.420. 臂进数解答君子谦嫌进壁解签子曰问A.4B.3C.2D.121. 1934680 76204 3845712A.1B.2C.3D.422. rfD4N92 AK6FD21 R2NBpDFA.1B.2C.3D.423. 46701 5891762 9685341A.4B.3C.2D.124. 面积计体海浅杯捧汁诲深面味渴和A.4B.3C.2D.125. 购兴光明老庄非了之举朋之乏光沟河地老摞A.4B.3C.2D.126. @%+《? #Q¥W ra-》∴? DSMβA.0B.1C.2D.327. bouqinstecdr sometlidrfgA.4B.5C.6D.728.chèrPDàmyB DansmějuyerA.5B.4C.3D.229. {!rβθ#?》±} 《BKθ∫》……*=/A.1B.2C.3D.430. 7B36rD1fhm 1pgfknD428A.1B.2C.3D.431. MainTesDLg menatvicDrqA.3B.4C.5D.632. franCis parledVouA.2B.3C.4D.533. 958 0137 5 769 203 4 658 172A.0B.1C.2D.334. 鹿南岳峰文考练知兵峰烤炼山麓的A.3B.2C.1D.035. 从洗呈答左这句关格洗签众天略这右句五二、数字区间定位(36—50题):请开始答题:36. 16591 37. 3495 38. 12757 39. 8421 40. 12185 41. 7548 42. 9861 43. 15102 44. 5618 45. 911746. 9923 47. 13251 48. 3920 49. 110926 50. 5621三、字符替换(51—60题):图例:数字表(表中含数字为1至9的自然数)请开始答题:51. 数字表对应¥的数字有几个:A. 1B. 2C. 3D. 452. 数字表中代表U的数字在哪几列:A. 1 2 4 9B. 2 4 6 8C. 2 5 7 9D. 1 4 6 853. 数字表中第8列对应的符号是:A.H◇U♀B. E☆¥♀C. U*¥♀D. ¥E♀◇54. 数字表中第4列的数字对应的符号是:A. *♀¥EB. *¥EUC. E☆♀□D. *♀¥U55. 数字表中第4列与第6列相同数字的符号是:A. ¥□B.*UC. ♀*D. U¥56. 数字表中第4行缺失数字对应的符号是:A. ¥*HB. ¥□HC.*◇HD.* ¥☆57. 数字表第2行缺失数字对应的符号是:A. H◇B. □HC. ¥♀D. ☆□58. 符号◇所对应的数字在数字表中总共出现过几次?:A. 3B. 4C. 5D. 659. 数字表中第4列四个数字之和所得结果对应的符号是:A. EHB. ¥*C. E♀D. ¥E60. 数字表中第9列四个数字之和所得结果对应的符号是:A. E□B. ¥¥C. ¥HD. *¥第二部分数量关系(共20题,参考时限20分钟)一、数字推理。

2008年英语竞赛B类试题答案与作文评分标准

2008年英语竞赛B类试题答案与作文评分标准

2008 National English Contest for College Students(Level B - Preliminary)参考答案及作文评分标准Part I Listening Comprehension (25 minutes, 30 marks)Section A (10 marks)1. A2. B3. A4. C5. A6. B7. B8. C9. B 10. CSection B (5 marks)11. C 12. B 13. A 14. B 15. CSection C (5 marks)16. A 17. A 18. C 19. B 20. ASection D (10 marks)21. careers22. overseas / in other countries / abroad23. companies and businesses24. homeless25. (student) common room26. hot meals27. (a) book exchange (throughout the college)28. advice about various problems29. accommodation30. speakersPart II Multiple Choice (10 minutes, 15 marks)Section A (10 marks)31. A 32. C 33. A 34. C 35. D 36. B 37. D 38. B 39. B 40. DSection B (5 marks)41. D 42. D 43. B 44. A 45. CPart III Reading Comprehension (20 minutes, 40 marks)Section A (5 marks)46. D 47. B 48. C 49. C 50. DSection B (15 marks)(注:51-55题,每题1 分;56-60 题,每题2 分。

CGSS2008B卷

CGSS2008B卷

2008年全国综合社会调查问卷B卷1. 问卷编号: _____ ______ ______ ______ (必须和A卷保持一致)2.被访者姓名: _______________________ (必须和A卷保持一致)FF1.B卷访问开始时间:[__|__]月[__|__]日[__|__]时[__|__]分; 结束时间:[__|__]时[__|__]分(24小时制)FF2.B卷访问总长度:_____ _____ (分钟)(B卷)F部分:态度和看法首先,我们问一些关于发展机会的问题……[出示卡片-第55页]F1.您认为下列因素在人生发展中的重要程度如何?[INEQ](1)非常重要比较重要一般重要不太重要根本不重要无法选择a.出生在一个富裕家庭有多重要? 1 2 3 4 5 6b.父母受过良好教育有多重要? 1 2 3 4 5 6c.自己受过良好教育有多重要? 1 2 3 4 5 6d.树立志向有多重要? 1 2 3 4 5 6e.努力工作有多重要? 1 2 3 4 5 6f.认识正确的人有多重要? 1 2 3 4 5 6g.有政治关系有多重要? 1 2 3 4 5 6h. 行贿有多重要? 1 2 3 4 5 6i. 个人的民族有多重要? 1 2 3 4 5 6 j. 个人的宗教信仰有多重要? 1 2 3 4 5 6 K.生为一个男人或女人有多重要? 1 2 3 4 5 6[出示卡片-第55页]F2.您是否同意下列说法?[INEQ](2)非常同意同意不同意也不反对不同意非常不同意无法选择a.要想在当今出人头地,你就不得不腐败。

1 2 3 4 5 6b. 在我们国家,只有从最好的高中毕业的人才有好机会被大学录取。

1 2 3 4 5 6c.在我们国家,只有有钱人才能负担得起大学教育的费用。

1 2 3 4 5 6d. 在我们国家,人们有同样的获得大学教育的机会,无论他们的性别、民族、社会背景怎样。

1 2 3 4 5 6[出示卡片-第56页]F3.您认为您的工作收入是?(如果您目前不工作,请说您之前的最后那份工作)[INEQ](3)比我应得的少多了 (1)比我应得的少 (2)刚好是我应得的 (3)比我应得的多 (4)比我应得的多多了 (5)从来没工作过 (6)无法选择 (7)F4. 我们想了解一下,您认为下列职业的从业者实际上会有多少收入。

2008专八真题附带答案与解析

2008专八真题附带答案与解析

2008专八真题附带答案与解析2008 年英语试题及答案TEST FOR ENGLISH MAJORS (2008)-GRADE EIGHTTIMELIMIT: 195 MINPARTI LISTENING COMPREHENSION (35 MIN)SECTION A MINI-LECTUREIn this section you will hear a mini-lecture. You will hear the lectureONCE ONLY. While listening, take notes on the important points. Yournotes will not be marked, but you will need them to complete agap-filling task after the mini-lecture. When the lecture is over, youwill be given two minutes to check your notes, and another ten minutesto complete the gap-filling task on ANSWER SHEET ONE. Use the blanksheet for note-taking.SECTION B CONVERSATIONIn this section you will hear everything ONCE ONLY. Listen carefullyand then answer the questions that follow. Mark the correct answer toeach question on your coloured answer sheet. Questions 1 to 5 are based on a conversation. At the end of theconversation you will be given 10 seconds to answer each of thefollowing five questions.Now listen to the conversation.1. Mary doesn't seem to favour the idea of a new airport becauseA. the existing airports are to be wastedB. more people will be encouraged to travel.382C. more oil will be consumed.D. more airplanes will be purchased.2. Which of the following is NOT mentioned by Mary asa potentialdisadvantage?A. More people in the area.B. Noise and motorways.C. Waste of land.D. Unnecessary travel.3. Freddy has cited the following advantages for a new airportEXCEPTA. more job opportunities.B. vitality to the local economy.C. road construction,D. presence of aircrew in the area.4. Mary thinks that people don't need to do much travel nowadaysas a result ofA. less emphasis on personal contact.B. advances in modern telecommunications.C. recent changes in people's concepts.D. more potential damage to the area5. We learn from the conversation that Freddy is Mary's ideas,383A. strongly in favour ofB. mildly in favour ofC. strongly againstD. mildly againstSECTION C NEWS BROADCASTIn this section you will hear everything ONCE ONLY. Listen carefullyand then answer the questions that follow. Mark the correct answer toeach question on your coloured answer sheet. Question 6 is based on the following news. At the end of the news item, you will be given 10 seconds to answer the question. Now listen to the news.6. What is the main idea of the news item?A. A new government was formed after Sunday's elections.B. The new government intends to change the welfare system.C. The Social Democratic Party founded the welfare system.D. The Social Democratic Party was responsible for high unemployment.Questions 7 and 8 are based on the following news. At the end of thenews item, you will be given 20 seconds to answer the questions.Now listen to the news.7. The tapes of the Apollo-11 mission were first stored inA. a U.S. government archives warehouse.B. a NASA ground tracking station.384C. the Goddard Space Flight Centre.D. none of the above places.8. What does the news item say about Richard Nafzger?A. He is assigned the task to look for the tapes.B. He believes that the tapes are probably lost.C. He works in a NASA ground receiving site.D. He had asked for the tapes in the 1970s. Questions 9 and10 are based on the following news. At the end of thenews item, you will be given 20 seconds to answer the questions.Now listen to the news.9. The example in the news item is cited mainly to showA. that doctors are sometimes professionally incompetentB. that in cases like that hospitals have to pay huge compensations.C. that language barriers might lower the quality of treatment.D. that language barriers can result in fatal consequences.10. According to Dr. Flores, hospitals and clinicsA. have seen the need for hiring trained interpreters.B. have realized the problems of language barriers.C. have begun training their staff to be bilinguals.D. have taken steps to provide accurate diagnosis. 385PART II READING COMPREHENSION (30 MIN)In this section there are four reading passages followed by a totalof 20 multiple-choice questions. Read the passages and then mark youranswers on your coloured answer sheetTEXT AAt the age of 16, Lee Hyuk Joon's life is a living hell. The South Korean10th grader gets up at 6 in the morning to go to school, and studiesmost of the day until returning home at 6 p.m. After dinner, it's timeto hit the books again—at one of Seoul's many so-called cram schools.Lee gets back home at 1 in the morning, sleeps less than five hours,then repeats the routine—five days a week. It's a grueling schedule,but Lee worries that it may not be good enough to get him into a topuniversity. Some of his classmates study even harder. South Korea's education system has long been highly competitive. But for Lee and the other 700,000 high-school sophomores in the country,high-school studies have gotten even more intense. That's because SouthKorea has conceived a new college-entrance system, which will beimplemented in 2008. This year's 10th graders will be the first groupevaluated by the new admissions standard, which places more emphasison grades in the three years of high school and less on nationwideSAT-style and other selection tests, which have traditionallydetermined which students go to the elite colleges. The change was made mostly to reduce what the government says is agrowing education gap in the country: wealthy students go to the bestcolleges and get the best jobs, keeping the children of poorer familieson the social margins. The aim is to reduce the importance of costlytutors and cram schools, partly to help students enjoy a more normalhigh-school life. But the new system has had the opposite effect. Before,students didn't worry too much about their grade-point averages; thebig challenge was beating the standardized tests as high-school seniors.Now students are competing against one another over a three-year period,386and every midterm and final test is crucial. Fretful parents are relyingeven more heavily on tutors and cram schools to help their childrensucceed.Parents and kids have sent thousands of angry online letters to theEducation Ministry complaining that the new admissions standard issetting students against each other. "One can succeed onlywhen othersfail,” as one pare nt said.Education experts say that South Korea's public secondary-schoolsystem is foundering, while private education is thriving. Accordingto critics, the country's high schools are almost uniformlymediocre—the result of an egalitarian government education policy.With the number of elite schools strictly controlled by the government,even the brightest students typically have to settle for ordinaryschools in their neighbourhoods, where the curriculum is centred onaverage students. To make up for the mediocrity, zealous parents sendtheir kids to the expensive cram schools.Students in affluent southern Seoul neighbourhoods complain that thenew system will hurt them the most. Nearly all Korean high schools willbe weighted equally in the college-entrance process, and relativelyweak students in provincial schools, who may not score well onstandardized tests, often compile good grade-point averages.Some universities, particularly prestigious ones, openly complain thatthey cannot select the best students under the new system because iteliminates differences among high schools. They've asked for morediscretion in picking students by giving more weight to such screeningtools as essay writing or interviews.President Roh Moo Hyun doesn't like how some colleges are trying tocircumvent the new system. He recently criticized "greedy"universities that focus more on finding the best students than fayingto "nurture good students". But amid the crossfire between thegovernment and universities, the country's 10th graders are feelingthe stress. On online protest sites, some are calling themselves a“cursed generation” and “mice in a lab experiment”. It all seemsa touch melodramatic, but that's the South Korean school system.38711. According to the passage, the new college-entrance system isdesigned toA. require students to sit for more college-entrance tests.B. reduce the weight of college-entrance tests.C. select students on their high school grades only.D. reduce the number of prospective college applicants.12. What seems to be the effect of introducing the new system?A. The system has given equal opportunities to students.B. The system has reduced the number of cram schools.C. The system has intensified competition among schools.D. The system has increased students' study load.13. According to critics, the popularity of private education ismainly the result ofA. the government's egalitarian policy.B. insufficient number of schools:C. curriculums of average quality.D. low cost of private education.14. According to the passage, there seems to be disagreement overthe adoption of the new system between the following groups EXCEPTA. between universities and the government.388B. between school experts and the government.C. between parents and schools.D. between parents and the government.15. Which of the following adjectives best describes the author'streatment of the topic?A. Objective.B. Positive.C. Negative.D. Biased.TEXT BWilfred Emmanuel-Jones was a teenager before he saw hisfirst cow inhis first field. Born in Jamaica, the 47-year-old grew up in inner-cityBirmingham before making a career as a television producer andlaunching his own marketing agency. But deep down he always nurturedevery true Englishman's dream of a rustic life, a dream that hisentrepreneurial wealth has allowed him to satisfy. These days he's theowner of a thriving 12-hectare farm in deepest Devon with cattle, sheepand pigs. His latest business venture: pushing his brand of Black Fannergourmet sausages and barbecue sauces. “My background may be veryurban,” says Emmanuel-Jones. “But it has given me a good idea of whatother urbanites want.”And of how to sell it. Emmanuel-Jones joins a herd ofwealthy fugitivesfrom city life who are bringing a new commercial know-how to Britishfarming. Britain's burgeoning farmers' markets-numbers have doubledto at least 500 in the last five years—swarm with specialtycheesemakers, beekeepers or organic smallholders who are redeployingthe business skills they learned in the city. "Everyone in theruralcommunity has to come to terms with the fact that things have changed."389Says Emmanuel-Jones. "You can produce the best food in the world, butif you don't know how to market it, you are wasting your time. We arehelping the traditionalists to move on."The emergence of the new class of superpeasants reflects some oldyearnings. If the British were the first nation to industrialize, theywere also the first to head back to the land. "There is this romanticimage of the countryside that is particularly English," says AlunHowkins of the University of Sussex, who reckons the population of ruralEngland has been rising since 1911. Migration into rural areas is nowrunning at about 100,000 a year, and the hunger for a taste of the rurallife has kept land prices buoyant even as agricultural incomes tumble.About 40 percent of all farmland is now sold to "lifestyle buyers"rather than the dwindling number of traditional farmers, according tothe Royal Institution of Chartered Surveyors.What's new about the latest returnees is their affluence and zeal forthe business of producing quality foods, if only at a micro-level. Ahealthy economy and surging London house prices have helped to easethe escape of the would-be rustics. The media recognize and feed thefantasy. One of the big TV hits of recent years, the "River Cottage"series, chronicled the attempts of a London chef to run his own Dorsetfarm.Naturally, the newcomers can't hope to match their City salaries, butmany are happy to trade any loss of income for the extra job satisfaction.Who cares if there's no six-figure annual bonus when the land offersother incalculable compensations?Besides, the specialist producers can at least depend on a burgeoningmarket for their products. Today's eco-aware generation loves to seekout authentic ingredients. "People like me may be making a differencein a small way," Jan McCourt, a onetime investment banker now runninghis own 40-hectare spread in the English Midlands stocked with rarebreeds.Optimists see signs of far-reaching change: Britain isn't catching upwith mainl and Europe; it's leading the way. “Unlike most othercountries, where artisanal food production is being eroded, here it390is being recovered," says food writer Matthew Fort. “It may be themark of the next stage of civilization that we rediscover the de sirability of being a peasant.” And not an investment banker.16. Which of the following details of Wilfred Emmanuel-Jones isINCORRECT?A. He was born and brought up in Birmingham.B. He used to work in the television industry.C. He is wealthy, adventurous and aspiring.D. He is now selling his own quality foods.17. Most importantly, people like Wilfred have brought totraditional British farmingA. knowledge of farming.B. knowledge of brand names.C. knowledge of lifestyle.D. knowledge of marketing,18. Which of the following does NOT contribute to the emergence ofa new class of farmers?A. Strong desire for country life.B. Longing for greater wealth,C. Influence of TV productions.D. Enthusiasm for quality food business.19. What is seen as their additional source of new income?391A. Modern tendency to buy natural foods.B. Increase in the value of land property.C. Raising and selling rare live stock. VD. Publicity as a result of media coverage.20. The sentence in the last paragraph “...Britain isn't catchingup with mainland Europe; it's leading the way" implies thatA. Britain has taken a different path to boost economy.B. more authentic foods are being produced in Britain.C. the British are heading back to the countryside.D. the Europeans are showing great interest in country life.TEXT CIn Barcelona the Catalonians call them castells, but these aren'tstereotypical castles in Spain. These castles are made up of humanbeings, not stone. The people who perform this agile feat of acrobaticsare called castellers, and to see their towers take shape is to observea marvel of human cooperation.First the castellers form what looks like a giganticrugby scrummage.They are the foundation blocks of the castle. Behind them, other peoplepress together, forming outward-radiating ramparts of inward-pushingmuscle: flying buttresses for the castle. Then sturdy but lightercastellers scramble over the backs of those at the bottom and stand,barefoot, on their shoulders—then still others, each time adding ahigher "story".These human towers can rise higher than small apartment buildings: nine“stories”, 35 feet into the air. Then, just When it seems this towerof humanity can't defy gravity any longer, a little kid emerges fromthe crowd and climbs straight up to the top. Arms extended, the child392grins while waving to the cheering crowd far below. Dressed in their traditional costumes, the castellers seem to epitomize an easier time, before Barcelona became a world metropolis arid theMediterranean's most dynamic city. But when you observe-them tip close,in their street clothes, at practice, you see there's nothing easy aboutwhat the castellers do - and that they are not merely reenacting anancient ritual.None of the castellers can-give a logical answer as to whythey lovedoing this. But Victor Luna, 16, touches me on the shoulder and saysin English: "We do it because it's beautiful. We do it because we areCatalan."Barcelona’s mother tongue is Catalan, and to understand Barcelona,you must understand two words of Catalan: seny and rauxa. Seny prettymuch translates as common sense, or the ability to make money, arrangethings, and get things done. Rauxa is reminiscent of our words “raucous”and “ruckus”.What makes the castellers revealing of the city is that they embodyrauxa and seny. The idea of a human castle is rauxa—it defies commonsense—but to watch one going up is to see seny in action. Success isbased on everyone working together to achieve a shared goal.The success of Carlos Tusquets' bank, Fibanc, shows seny at work ineveryday life. The bank started as a family concern and now employshundreds. Tusquets said it exemplifies how the economy in Barcelonais different.Entrepreneurial seny demonstrates why Barcelona and Catalonia—theancient region of which Barcelona is the capital—are distinct fromthe rest of Spain yet essential to Spain's emergence, after centuriesof repression, as a prosperous, democratic European country. Catalonia,with Barcelona as its dynamo, has turned into an economic powerhouse.Making up 6 percent of Spain’s territory, with a sixth of its people,it accounts for nearly a quarter of Spain's production—everything fromtextiles to computers—even though the rest of Spain has been enjoyingits own economic miracle.393Hand in hand with seny goes rauxa, and there's no better place to seerauxa in action than on the Ramblas, the venerable, tree-shadedboulevard that, in gentle stages, leads you from the centre of Barcelonadown to the port. There are two narrow lanes each way for cars andmotorbikes, but it’s the wide centre walkway that makes the Ramblasa front-row seat for Barcelona's longest running theatrical event.Plastic armchairs are set out on the sidewalk. Sit in one of them, andan attendant will come and charge you a small fee. Performance artiststhrong the Ramblas—stilt walkers, witches caked in charcoal dust,Elvis impersonators. But the real stars are the old women and happilyplaying children, millionaires on motorbikes, and pimps and women who,upon closer inspection, prove not to be.Aficionados (Fans) of Barcelona love to compare notes: “Last nightthere was a man standing on the balcony of his hotel room,” MarianaBertagnolli, an Italian photographer, told me. "The balcony was on thesecond floor. He was naked, and he was talking into a cell phone."There you have it, Barcelona's essence. The man is naked (rauxa), buthe is talking into a cell phone (seny).21. From the description in the passage, we learn thatA. all Catalonians can perform castells.B. castells require performers to stand on each other.C. people perform castells in different formations.D. in castells people have to push and pull each other.22. According to the passage, the4mplication of the performance isthatA. the Catalonians are insensible and noisy people.B. the Catalonians show more sense than is expected. 394C. the Catalonians display paradoxical characteristics.D. the Catalonians think highly of team work.23. The passage cites the following examples EXCEPT __________ toshow seny at work.A. development of a bankB. dynamic role in economyC. contribution to national economyD. comparison with other regions24. In the last but two paragraph, the Ramblas is described as “afront-row seat for Barcelona’s longest running theatrical event”.What does it mean?A. On the Ramblas people can see a greater variety of performances.B. The Ramblas provides many front seats for the performances.C. The Ramblas is preferred as an important venue for the events.D. Theatrical performers like to perform on the Ramblas.25. What is the main impression of the scenes on the Ramblas?A. It is bizarre and Outlandish.B. It is of average quality.C. It is conventional and quiet.D. It is of professional standard.TEXT D395The law firm Patrick worked for before he died filed for bankruptcyprotection a year after his funeral. After his death, the firm's letterhead properly included him: Patrick S. Lanigan, 1954-1992. Hewas listed up in the right-hand corner, just above the paralegals. Thenthe rumors got started and wouldn't stop. Before long, everyonebelieved he had taken the money and disappeared. After three months,no one on the Gulf Coast believed that he was dead. His name came offthe letterhead as the debts piled up.The remaining partners in the law firm were still together, attachedunwillingly at the hip by the bondage of mortgages andthe bank notes,back when they were rolling and on the verge of serious wealth. Theyhad been joint defendants in several unwinnable lawsuits; thus thebankruptcy. Since Patrick's departure, they had tried every possibleway to divorce one another, but nothing would work. Two were ragingalcoholics who drank at the office behind locked doors, but nevertogether. The other two were in recovery, still teetering on thebrink of sobriety.He took their money. Their millions. Money they had already spent longbefore it arrived, as only lawyers can do. Money for their richlyrenovated office building in downtown Biloxi. Money for new homes,yachts, condos in the Caribbean. The money was on the way, approved,the papers signed, orders entered; they could see it, almost touch itwhen their dead partner—Patrick—snatched it at the last possiblesecond.He was dead. They buried him on February 11, 1992. They had consoledthe widow and put his rotten name on their handsome letterhead. Yetsix weeks later, he somehow stole their money.They had brawled over who was to blame. Charles Bogan, the firm's seniorpartner and its iron hand, had insisted the money be wired from itssource into a new account offshore, and this made sense after somediscussion. It was ninety million bucks, a third of which the firm wouldkeep, and it would be impossible to hide that kind of money in Biloxi,population fifty thousand. Someone at the bank would talk.Sooneveryone would know. All four vowed secrecy, even as they made plansto display as much of their new wealth as possible. There had even been396talk of a firm jet, a six-seater.So Bogan took his share of the blame. At forty-nine, he was the oldestof the four, and, at the moment, the most stable. He was also responsiblefor hiring Patrick nine years earlier, and for this he had receivedno small amount of grief.Doug Vitrano, the litigator, had made the fateful decision to recommendPatrick as the fifth partner. The other three had agreed, and whenPatrick Lanigan was added to the firm name, he had access to virtuallyevery file in the office. Bogan, Rapley, Vitrano, Havarac, and Lanigan,Attorneys and Counselors-at-Law. A large ad in the yellow pages claimed"Specialists in Offshore Injuries." Specialists or not, like most firmsthey would take almost anything if the fees were lucrative. Lots ofsecretaries and paralegals. Big overhead, and the strongest politicalconnections on the Coast.They were all in their mid- to late forties. Havarac had been raisedby his father on a shrimp boat. His hands were still proudly calloused,and he dreamed of choking Patrick until his neck snapped. Rapley wasseverely depressed and seldom left his home, where he wrote briefs ina dark office in the attic.26. What happened to the four remaining lawyers after Patrick'sdisappearance?A. They all wanted to divorce their wives.B. They were all heavily involved in debts.C. They were all recovering from drinking.D. They had bought new homes, yachts, etc.27. Which of the following statements contains a metaphor?A. His name came off the letterhead as the debts piled up.B. …they could see it, almost touch it when their dead partner...397C. …, att ached unwillingly at the h ip by the bondage of mortgages...D. …, and for this he had received no small amount of grief.28. According to the passage, what is the main cause of Patrickstealing the money?A. Patrick was made a partner of the firm.B. The partners agreed to have the money transferred.C. Patrick had access to all the files in the firm.D. Bogan decided to hire Patrick nine years earlier.29. The lawyers were described as being all the following EXCEPTA. greedy.B. extravagantC. quarrelsome.D. bad-tempered.30. Which of the following implies a contrast?A. …, and it would be impossible to hide that kind of money in Biloxi,population fifty thousand.B. They had been joint defendants in several unwinnable lawsuits; thusthe bankruptcy.C. There had even been talk of a firm jet, a six-seater.D. His name came off the letterhead as the debts piled up.398PART III GENERAL KNOWLEDGE (10 MIN)There are ten multiple-choice questions in this section. Choose thebest answer to each question. Mark your answers on your coloured answersheet31. The largest city in Canada isA. Vancouver.B. Montreal.C. TorontoD. Ottawa.32. According to the United States Constitution, thelegislativepower is invested inA. the Federal Government.B. the Supreme Court.C. the Cabinet.D. the Congress.33. Which of the following is the oldest sport in the United States?A. Baseball.B. Tennis.C. Basketball.D. American football.34. The head of the executive branch in New Zealand is 399A. the President.B. the Governor-General.C. the British monarch,D. the Prime Minister.35. The Canterbury Tales, a collection of stories told by a groupof pilgrims on their way to Canterbury, is an important poetic workbyA. William Langland.B. Geoffrey Chaucer.C. William Shakespeare.D. Alfred Tennyson.36. Who wrote The American?A. Herman Melville.B. Nathaniel Hawthorne.C. Henry James.D. Theodore Dreiser.37. All of the following are well-known female writers in 20th-century Britain EXCEPTA. George Eliot.B. Iris Jean Murdoch.C. Doris Lessing.400D. Muriel Spark.38. Which of the following is NOT a design feature of human language?A. Arbitrariness.B. Displacement.C. Duality.D. Diachronicity.39. What type of sentence is “Mark likes fiction, but Tim isinterested in po etry.”?A. A simple sentence.B. A coordinate sentence.C. A complex sentence.D. None of the above.40. The phenomenon that words having different meanings have the sameform is calledA. hyponymy.B. synonymy.C. polysemy.D. homonymy.PART IV PROOFREADING & ERROR CORRECTION (15 MIN) 401Proofread the given passage on ANSWER SHEET TWO as。

2008全国卷B

2008全国卷B

绝密★启用前试卷类型:B 2008年普通高等学校招生全国统一考试理科综合能力测试本试卷共12页,满分360分,考试时间150分钟。

注意事项:1.答卷前,考生务必将自己的姓名,准考证号填写在试题卷和答题卡上,并将准考证号条形码粘巾在答题卡上指定位置。

2.选择题每小题选出答案后,用2B铅笔将答题卡上,对应题目的答案标号涂写,如写改动,用橡皮擦干净后,再选涂其它答案标号,答在试题卷上无效。

3.非选择题用0.5毫米的黑色墨水签字夂答在答题卡上每题对应的答题区域内,答在试题卷上无效。

4.考试结束,请将本试题卷和答题卡一并上交。

选择题共21小题,第小题6分,共126分。

以下数据可供解题时参考:相对原子质量(原子量):H l C 12 O 16 Na 23 K 39Mn 55 Cu 64 Zn 65 Ag 108 Pb 207一、选择题(本题共13小题,在每小题给出的四个选项中,只有一项是符合题目要求的。

)1.为了验证胰岛素具有降低血糖含量的作用,在设计实验方案时,如果以正常小鼠每次注射药物前后小鼠症状的变化为观察指标,则下列对实验组小鼠注射药物的顺序。

正确的是A.先注射胰岛素溶液,后注射葡萄糖溶液B.先注射胰岛素溶液,再注射胰岛素溶液C.先注射胰岛素溶液,后注射生理盐水D.先注射生理盐水,后注射胰岛素溶液2.某水池有浮游动物和藻类两个种群,其种群密度随时间变化的趋势如图,若向水池中投放大量专食浮游动物的某种鱼(丙),一段时期后,该水池甲、乙、丙三个种群中公剩一个种群。

下列关于该水池中上述三个种群关系及变化的叙述,正确的是A.甲和丙既有竞争关系又有捕食关系,最终仅剩下甲种群B.甲和乙既有竞争关系又有捕食关系,最终仅剩下丙种群C.丙和乙既有竞争关系又有捕食关系,最终仅剩下甲种群D.丙和乙既有竞争关系又有捕食关系,最终仅剩下丙种群3.下列关于细菌的叙述,错误..的是A.硝化细菌能以NH,作为氮源和能源物质B.某些细菌可以利用光能因定CO2合成有机物C.生长因子是某些细菌生长过程中需要额外补弃的营养物质D.含伊红和美蓝试剂的培养基不能用来签别牛奶中的大肠杆菌4.已知某种限制性内切酶在一线性DNA分子上有3个酶切位点,如图中箭头所指,如果该线性DNA分子在3个酶切位点上都被该酶切断,则会产生a、b、c、d四种不同长度的DNA片段。

2008年6月高等学校英语应用能力考试B级真题及答案详解

2008年6月高等学校英语应用能力考试B级真题及答案详解

2008年6月高等学校英语应用能力考试B级真题及答案详解Part ⅠListening Comprehension1. 【答案】A【解析】本题是说天气很好,“Why not go to the zoo?”,回答当然是“好主意”。

故答案只能选A。

2. 【答案】D【解析】本题问的是有关度寒假的时间问题,“When can I take my winter vacation?”, 只有选项D的回答与时间有关,故为正确答案。

3. 【答案】B【解析】本题问的是对演出的看法,“Did you enjoy the performance last night ?”回答只有B“太好了”合乎题意,故为正确答案。

4. 【答案】B【解析】本题是邀请对方吃饭,“Can we have dinner together this weekend?”, 对方回答“当然可以。

在哪里吃饭?”故答案选B。

5. 【答案】C【解析】本题是有问题请教,“Professor Smith, may I ask you a few questions?”教授当然应该解答,所以说“问吧”。

Go ahead 本意为“往前走”,这里引申为“问吧”。

故答案选C。

6. 【答案】C【解析】本题问女士要的是什么。

由她所回答的“Just water.”可知,答案为C。

7. 【答案】A【解析】本题问的是男士所说的话的含义。

男士的话是“the telephone is out of order.”既然电话坏了,就不可能为她叫出租车了,故答案选A。

8. 【答案】B【解析】本题问的是两对话者的关系。

由关键词“doctor”和“Just a cold,nothing serious”可知,这是医生和病人之间的对话,故答案选B。

9. 【答案】A【解析】本题问的是那位女士平时是如何去上班的。

由关键词“walk to work every day”可知,她每天步行去上班,故答案选A。

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参考答案 命题人: 项华珍 试卷分类(A 卷或B 卷) B
五邑大学 试 卷
学期: 2007 至 2008 学年度 第 二 学期 课程:
低频电子线路 专业:
班级: AP06
姓名: 学号:
一、选 择 题 (共10分)
1. 双极性三极管BJT 是( B )控制器件;而场效应管FET 是( A
)控制器件。

A 电压
B 电流
C 电阻
D 电容
2. 为抑制直接耦合多级放大电路的零点漂移,最有效的方法是输入级采用( C )。

A 共射电路 B 共集电路 C 差分电路 D 功放电路
3. 在电压放大电路中,为减少失真,通常使放大管工作于( A )状态;而在功率放大电路
中,为使提高效率同时又要降低失真,通常功率放大管工作于( B )。

A 甲类 B 甲乙类 C 乙类
4. 理想运算放大器在深度负反馈时工作于线性区,具有“虚短”和“虚断”特性,表现为( C ),
( A ) 。

A 0==-+i i
B 0==-+u u
C -+=u u
D -+=i i
5. 某放大电路引入电压串联负反馈后,将使其( C )基本稳定,( B )增大,( A ) 减小。

A. 输出电阻 B. 输入电阻 C. 输出电压 D. 输出电流 E. β值 F.
f u 值
二、填 空 题 (共10分)
1. 将交流电转化为直流电的线性直流稳压电源,通常由4部分组成,分别是变压器、 整流电路 、 滤波电路 、 稳压电路 。

2. 测得某NPN 型BJT 的三个管脚电压如下:当B U =6.7V 、E U =6.0V 、C U =6.3V 。

则该管子工作在 饱和 状态。

3. N 型半导体中,多数载流子为 电子 、少数载流子为 空穴 。

4. 由理想运算放大器构成的运算电路如图1所示。

其输入输出关系为i o u u =
5. RC 串并联文氏电桥正弦波振荡器如图2所示。

要使电路能满足相位平衡条件即正反馈,标出运放的同相端和反相端。

(3分)
综 合 题 (共80分)
三、(15分) 图3所示电路中,三极管β=100,='b b r 200Ω,BE U =0.7V 。

(1)求三极管的静态值C I 、CE U ; (3分) (2)画出该电路的微变等效电路图; (3分)
(3)从1o u 端输出时,求输入电阻i R 、输出电阻R o 、电压增益∙*

=i
o1u1U U A ; (6分)
(4)从2o u 端输出时,求电压增益∙

∙=i
o2u2
U U
A。

(3分) 解:(1) 求静态工作点 (3分)
V 3.212123312
CC b21b 2b B =⨯+=+=
U R R R U (1分)
mA 5.2k
10.7
3.2e BE B E C =-=-=≈R U U I I (1分)
V 5.4)12(5.212e E C C CC CE =+-=--=R I R I U U (1分)
(2)画微变等效电路:(3分 )
(3) 先求Ω=⨯++=++='k 1.255
.226
)1001(200mV 26)
1(E b b be I r r β (1分) Ω=⨯++=++=k 2.8k] 1100)(1k//[1.25k k//12 33))1(//(//e be b2b1i R r R R R β (1分)
Ω=≈k 2c o R R (1分)
95.1k 1100)(1k 1.25k 2100)1(c 1o u1-≈⨯++⨯-=++-==∙R r R U
U A ββ (3分)
图1
i
u
图4
o
R

F 图2
I
(4) 99.0k
11)(100k 1.25k
11)(100)1()1(e be e u2
=⨯++⨯+=+++=R r R A ββ (3分)
四、(5分)
用示波器测得某信号电压波形如图4所示。

若示波器时间轴上刻度为1μS/格,电压幅度轴刻度为0.5V/格,请说明该放大器输出电压峰值是多少?该电压的频率是多少?
解:该放大器输出电压峰值为2V ,
该电压的周期μs 8=T ,频率=f 125 kHz 。

五、(6
图5所示的OCL 互补对称功率放大电路,Ω=8L R ,三极管的饱和压降V 1ces =U 。

求电路的最大不失真输出功率为多少?
解:V 8CES CC om =-=U U U (3分)
W 48
2822
L om 2om =⨯==R U P (3分)
六、(10分)
在图6所示由场效应管构成的放大电路中,若图示参数及m g 均已知,电容1C 、2C 容量足够大。

(1)画出该放大电路的交流微变等效电路;(4分) (2)试求放大器的∙
u A 、i R 、o R 的表达式。

(6分)
解:(1)该放大器的微变等效电路如图所示。

(4分) (2) )1(m gs s gs R gs i R g U R I U U U U +=+=+=∙





(1分)
R
g R g R g U R R U g U U A D m /
L
m m gs L gs m i
o u 1)
(1)//(+-=+-
==


∙∙

(3分)
G2G1G3i
i i //R R R I U R +==

∙ (1分)
D o R R = (1分)
图 6
图 5



七、(10分)
如图7所示放大电路,设电路参数均已知。

(1)判断电路中引入了哪种组态的级间交流反馈;(2)写出反馈信号和反馈系数的表达式;(3)在深度反馈条件下,估算该电路的闭环电压放大倍数∙
f u A 。

(3分+3分+4分) 解:
(1) 由f C 、f R 和4R 对31~T T 之间引入交流电压串联负反馈;
(2)
f
o f R R R u u +⨯
=44,f
u R R R F +=
44
(3) 4
f u 11R R F
U U A f i
o +
=≈
=∙



八、(10分)
在图8中,各集成运算放大器为理想运算放大器,试求输出电压1o u 、2o u 、o u 与1u 、2u 的关系。

解:112
1o u R R u -
= (3分)
21
22o )1(u R R u += (3分) 2o 7
67
451o 45o )1(u R R R R R u R R u +++-= (4分)
九、(10分)
如图9所示稳压管稳压电路:i U =10V ,Ω=2001R ,Ω=k 1L R ,mA 12zmin =I 、mA
50max =z I 稳压管的稳压值Z U =6V 。

求(1)稳压管的工作电流Z I ;(2)当电源电压改变为i U =12V 时,Z I 将变为多少?(3)电源电压不变,将L R 变为Ωk 2,Z I 又将变为多少?(4)上述三种情况下,稳压管能否正常稳压? 解:(1) (4分)
mA 202.06
101z i R =-=-=R U U I
mA 61
6
L z O ===R U I mA 14620O R Z =-=-=I I I
(2) mA 30R =I , mA 24630Z =-=I
(2分) (3)
mA 3O =I , mA 17320Z =-=I (2分) (4)因满足:Zmax Z min z I I I ≤≤,稳压管可正常工作 (2分)
u u 图 9
图 7
L
图 9
十、(14分)
某差分电路如图9所示。

已知V 12EE CC ==U U ,
Ω=k 5b R 、Ω=k 10c R ,Ω=k 51e R ,80=β,V 6.0BE =U ,Ω=100bb'r 。

(1)试估算静态电流1C I 、2C I 管压降1CE U 、2CE U ;(4分) (2)求差模输入电阻id R 、输出电阻od R ;(4分) (3)求差模电压放大倍数ud A 。

(6分) 解:
(1)mA 12.051
212
2e EE 2C 1C =⨯=≈
=R U I I (2分)V 8.101012.012C C CC 2CE 1CE =⨯-=-≈=R I U U U (2分)
(2)Ω=+=++=k 65.1712
.026
8110026)1(1C bb'be I r r β (1分)
Ω=+=+=k 3.45)65.175(2)(2be b id r R R (2分) Ω==k 202c od R R (1分)
(3)32.3565.17510
80be b c ud -=+⨯-=+-=r R R A β (6分)
图9。

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