专业英语练习
专业英语练习卷 A(答案)

《专业英语(自动化)》复习卷A卷一.Put the following words and phrases into English or chinese. (20*1=20)1.电路circuit 2.控制系统Control system 3.元件component 4.电压voltage 5.电流current 6.欧姆定律Ohm’s Low 7.开关switch 8.指针needle 9.螺丝刀Scrow driver 10.引脚pin 11.Strip条纹12.Intergrated circuit集成电路13.chip晶片14.sensor传感器15.maintenance维护16.actuator执行器17.joint关节18.servomotor伺服电机19.telerobot遥控机器人20.gripper夹爪二.C hoose one word from the word list below to fill in the blank in each of thefollowing sentences. (20*1=20)1)Digital 2)analog, 3)positive 4)common 5)a function switch 6)a range switch 7)extended ranges of voltage 8)dc and ac9)current 10) resistanceA multimeter is a general-purpose meter capable of measuring 8 voltage,9 , 10 , and in some cases, decibels. There are two types of meters: 2 using a standard meter movement with a needle (see Fig 3.1(a)), and , with an 1 electronic numerical display (see Fig 3.1(b)).Both types of meters have a 3 (+) jack and a 4 jack (-) for the test leads, 5 to select dc voltage, ac voltage, dc current, ac current, or ohms and 6 for accurate readings. The meters may also have other jacks to measure 7 (1 to 5 kV) and current (up to 10A) there are some variations to the functions used for specific meters.1)Resistance 2)placed across (in parallel) 3)be removed4)in series with 5)mechanical adjust 6)automatic indicator5)properly 8) test leads 9)correct 10)be openedBesides the function and range switches (sometimes they are in a single switch.) The analog meter may have a polarity switch to facilitate reversing the test leads. The needle usually has a screw for 5 to set it to zero and also a zero adjust control to compensate for weakening batteries when measuring 1 . An analog meter can read positive and negative voltage by simply reversing the 8 or moving the polarity switch. A digital meter usually has an 6 for polarity on its display.Meters must be 7connected to a circuit to ensure a 9 reading. A voltmeter is always 2 the circuit or component to be measured. When measuring current, the circuit must 10 and the meter inserted 4 the circuit or component to be measured. When measuring the resistance of a component in a circuit, the voltage to the circuit must 3 and the meter placed in parallel with the component.三.Read the following passage and answer the questions.(5*8=40)RobotsRobots produce mechanical motion that,in most cases,results in manipulation or locomotion.For example,industrial robots manipulate parts or tools to perform manufacturing tasks such as material handing,welding,spray painting,or assembly;automated guided vehicles are used for transporting materials in factories and warehouses.Telerobots provide astronauts with large mainipulators for remotely performing spacecraft maintenance.Robots perform repetitive,high-precision operations 24 hours a day without fatigue.Robots on this automobile assembly line weld body parts together.The General Motors corporation uses about 16,000 robots to weld,assemble,and paint automobiles.Walking robots explore active volcanoes.Mechanical characteristics for robots include degrees of freedom of movement,size and shape of the operatingspace,stiffness and strength of the structure ,lifting capacity,velocity ,and acceleration under load.Performance measures include repeatability and accuracy of positioning,speed,and freedom from vibration.A robot is made up of sensors,actuators,and computatlonal elements(a microprocessor).Actuators for moving joints of a robot are usually electric servomotors.In the past ,larger robots were built with hydraulic actuation due to their high payload capacity and ability to work in explosion-prone environments.In the 1990s,there was a trend by the major manufacturers to use electric actuators in most of their industrial robots.A robot is an automatically controlled, reprogrammable, multipurpose, manipulating machine with several reprogrammable axes, which may be either fixed in place or mobile for use in industrial automation applications.The key words are reprogrammable and multipurpose because most single-purpose machines do not meet these two requirements. The term “reprogrammable” implies two things: The robot operates according to a written program, and this program can be rewritten to accommodate a variety of manufacturing tasks. The term “multipurpose” means that the robot can perform many different functions, depending on the program and tooling currently in use.Over the past two decades, the robot has been introduced into industry to perform many monotonous and often unsafe operations. Because robots can perform certain basic tasks more quickly and accurately than humans, they are being increasingly used in various manufacturing industries.1.What industrial robots can do for people?Industrial robots manipulate parts or tools to perform manufacturing tasks such as material handing,welding,spray painting,or assembly;automated guided vehicles are used for transporting materials in factories and warehouses.2.What are the advantages of robots?igue.Robots perform repetitive,high-precision operations 24 hours a day without fat3. What parts are made up of the robot?A robot is made up of sensors,actuators,and computatlonal elements(a microprocessor).4.What does t he term “reprogrammable” impl y?The term “reprogrammable”implies two things: The robot operates according to a written program, and this program can be rewritten to accommodate a variety of manufacturing tasks.5.Why are robots widely used over the past two decades?Because robots can perform certain basic tasks more quickly and accurately than humans, they are being increasingly used in various manufacturing industries.四.Read the following passage and t ranslate the underlined phrases and sentences into Chinese.(5*4=20)Classification of Robots1.Industrial robots vary widely in size, shape, number of axes, degrees of freedom, and design configuration. Each factor influences the dimensions of the robot’s working envelope or the volume of space within which it can move and perform its designated task. A broader classification of robots can been described as below.Fixed-and Variable-Sequence Robots. The fixed-sequence robot (also called a pick-and place robot) is programmed for a specific sequence of operations. Its movements are from point to point, and the cycle is repeated continuously. 2.The variable-sequence robot can be programmed for a specific sequence of operations but can be reprogrammed to perform another sequence of operation.3.Playback Robot. An operator leads or walks the playback robot and its end effector through the desired path. The robot memorizes and records the path and sequence of motions and can repeat them continually without any further action or guidance by the operator.Numerically Controlled Robot. 4.The numerically controlled robot is programmed and operated much like a numerically controlled machine. The robot is servo-controlled by digital data, and its sequence of movements can be changed with relative ease.5.Intelligent Robot. The intelligent robot is capable of performing some of the functions and tasks carried out by human beings. It is equipped with a variety of sensors with visual and tactile capabilities.1. 工业机器人在尺寸、形状、轴的数量、自由度、设计构型等方面广泛的变化。
专业英语四级考试词汇语法练习

专业英语四级考试词汇语法练习专业英语四级考试词汇语法练习11. I hope, when you finished this e*ercise,you____many mistakes in it.A. won’t makeB. won’t have madeC. won’t be makingD. won’t have been making2. ____he arrived at the airport, he realized what had happened there.A. The moment whenB. The momentC. UntilD. At the moment3. Water is to fish____atmosphere is to men.A. thatB. soC. whatD. so does4. I’m sure your suggestion will____the problem.A. contribute to solveB. be contributed to solveC. be contributed to solvingD. contribute to solving5. That our environment has little to do with our abilities, characters and behavior____central to his theory.A. isB. areC. has beenD. have been答案及解析: BBCDA1.【B】时态问题。
依据句意,主句的动作应在将来某一动作完成时完成,只有只有B的将来完成时较恰当。
2.【B】the moment这里做连词用,表示“就在……时,就在……的那一刻”,前面不需要加介词,如: Thunderous applause broke forth the moment the pop star appeared on the stage.3.【C】A is to B what C is to D是固定结构,表示“A与B的关系就像C与D的关系一样。
英语专业四级词汇练习

1. He might have be killed ______ the arrival of the police.A. except forB. but forC. withD. forKey: B.该句意思是“要不是警察来了,他本可能已经被杀死了”。
因此 B项but for是答案。
B项 but for意为“要不是,倘没有”,常用于虚拟语气的句子中。
例如:I could not have done it but for your help. 要不是有你的帮助,我不可能做成这件事。
2. These figures are not consistent ______ results obtained in previous experiments.A. toB. withC. forD. inKey: B.该句意思是“这些数字与前几次实验所得到的结果不一致”。
因此B项with是答案。
B项consistent为形容词,意为“和……一致”,后接 with。
例如: New goals are not always consistent with the existing policies.新目标并不总是与现行政策一致。
consistent 的动词形式为consist,consist with 意为“与……相一致”。
consist in意为“在于”,因此其他选项to,for,in均不符题意。
3. All the parts of these washing machines are ______, so that it is very convenient to replace them.A. normalizedB. modernizedC. mechanizedD. standardizedKey: D.该句意思是“这种洗衣机的全部部件都已经标准化了,因而更换部件非常方便”。
因此D项standardized是答案。
高一英语大学专业选择指导练习题40题

高一英语大学专业选择指导练习题40题1. Which major is related to the study of living organisms?A. Computer ScienceB. BiologyC. MathematicsD. History答案解析:B。
Biology 是生物学,主要研究生物,与living organisms(生物体)相关。
Computer Science 是计算机科学,与生物体无关。
Mathematics 是数学,也不涉及生物体研究。
History 是历史,同样与生物体没有关系。
2. Which major focuses on the design and development of software?A. PhysicsB. ChemistryC. EngineeringD. Computer Science答案解析:D。
Computer Science 是计算机科学,专注于软件的设计和开发。
Physics 是物理学,与软件设计无关。
Chemistry 是化学,也不涉及软件。
Engineering 是工程学,范围比较广,但不是专门针对软件设计和开发。
3. Which major is concerned with the study of human behavior and mental processes?A. PsychologyB. EconomicsC. SociologyD. Literature答案解析:A。
Psychology 是心理学,研究人类行为和心理过程。
Economics 是经济学,主要研究经济现象。
Sociology 是社会学,关注社会现象。
Literature 是文学,与人类行为和心理过程的研究关系不大。
4. Which major deals with the management of financial resources?A. AccountingB. MarketingC. PhilosophyD. Art答案解析:A。
英语专业语法练习题

I. Multiple-choice questions.1.All but one __________ here just now.A)is B) was C) has been D) were2.When and where to build the new factory __________ yet.A)is not decided B) has offeredC) has not decided D) have not decided3. Whether he succeeds or fails __________ me.A) concern B) is concernedC) don’t concern D) doesn’t concern4. Drinking goat’s milk and getting plenty of exercise __________ responsible for his physique.A) were B) is C) was D) have5. Soon every man, woman and child __________ talking about how to wipe out the enemy.A) was B) were C) are D) have been6. Anyone who __________ to come __________ welcome.A) want; are B) want; is C) wants; are D) wants; is7. More than one person __________ voted against him.A) have B) has C) is D) was8. Today some ninty percent of the country’s school-age children __________ in school.A) were B) was C) is D) are9. Those three minutes __________ the worst I ever spent.A) is B) was C) are D) were10. The impossible __________ often proved possible.A) has B) have C) is D) are11. In international matches, prestige is so important that the only thing that matters is to avoid __________.A. from being beatenB. being beatenC. beatingD. to be beaten12. He prefers __________.A. to write his letters rather than dictating themB. to write his letters rather than dictate themC. writing his letters rather than dictate themD. writing his letters rather than have dictated them13. Professor Johnson is said __________ some significant advance in his research in the past year.A. having madeB. makingC. to have nmadeD. to make14. This missile is designed so that once __________ nothing can be done to retrieve it.A. firedB. being firedC. they firedD. having fired15. He wasn’t asked to take on the chairmanship of the society, __________ insufficiently popular with all members.A. having consideredB. was consideredC. was being consideredD. being considered16. __________ no cause for alarm, the old man went back to his room.A. There wasB. SinceC. BeingD. There being17. If not __________ with the respect he feels due to him, Jack gets very ill-tempered and grumbles all the time.A. being treatedB. treatedC. be treatedD. having been treated18. Time __________, the celebration will be held as scheduled.A. permitB. permittingC. permittedD. permits19. The three men tried many times to sneak across the border into the neighbouring country, __________ by the police each time.A. had been capturedB. being always capturedC. only to be capturedD. unfortunately captured20. It’s no use __________ me not to worry.A. you tellB. your tellingC. for you to have toldD. having told21. __________ one can succeed depends on __________ hard he works.A. That; howB. That; howeverC. Whether; howD. Whether; however22. I was curious __________ he would say and do next.A. as to thatB. to whatC. about whatD. of what23. Water will continue to be __________ it is today – next in importance to oxygen.A. howB. whichC. asD. what24. Last week he promised __________ today, but he hasn’t arrived yet.A. that he would have comeB. what would he have comeC. which he would comeD. that he would come25. I knew nothing about his journey __________ he was likely to be away for three months.A. ifB. in thatC. except thatD. which26. He is trying all kinds of material to learn ___________ used.A. what of them can beB. that they can beC. which of them can beD. which of them be can27. We asked him the question __________.A. that the trouble isB. which the trouble isC. where is the troubleD. where the trouble is28. “Do you think we will have a two-hour meeting without break?”“__________.”A. I hope thatB. I don’t hope soC. I hope notD. I don’t hope that29. You will see to __________ the engine does not get out of order.A. thatB. howeverC. it thatD. which30. We all thought __________ that the football match should have been put off.A. it a pityB. it pityC. what a pityD. a pity is31. You __________ pay the money, but you __________ do so at once.A. needn’t ; mustB. need; needC. must; mustD. must; needn’t32. I didn’t enjoy the concet yesterday; it was a confusion, and the band didn’t play as it __________.A. didB. has doneC. used toD. have done33. We didn’t see him at the lecture yesterday. He __________ it.A. mustn’t have attendedB. can’t have attendedC. couldn’t attendD. needn’t have attended34. There is no parking in front of the post office. You __________ park there.A. oughtn’tB. can’tC. didn’tD. wouldn’t35. Dr. Jones, many students want to see you. __________ they wait here or outside?A. DoB. WillC. ShallD. Would36. The vocabulary and grammatical differences between British and American English are so trivial and few as hardly __________.A. noticedB. to be noticedC. being noticedD. to notice37. I didn’t mean __________ anything, but these apples looked so good I couldn’t resist __________ one.A. to eat; tryingB. to eat; to tryingC. eating; to tryD. eating; to trying38. There is one thing I dislike about him; he will never admit __________ a mistake.A. having madeB. makingC. being madeD. having been made39. Several of these washers and dryers are out of order and __________.A. need to be repairingB. require that they be repairedC. repairing is required of themD. need to be repaired40. Our modern civilization must not be thought of as __________ in a short period of time.A. being createdB. to have been createdC. having been createdD. to be created41. __________ is very important in daily life.A. HonestyB. The honestyC. An honestyD. Honest42. Some boys have two names; __________ boy have three.A. the otherB. otherC. anotherD. none other43. The man in a black suit is __________.A. president of a bankB. bank presidentC. a bank’s presidentD. a bank’s president44. I’m busy now; ask him to see me __________ time.A. the otherB. some otherC. otherD. another45. __________ draw very well.A. These both childrenB. Both these childrenC. Both of theyD. Both themII. Blanks-filling.1. After __________ (think) everything over, she decided __________ (not leave) that day.2. The secretary asked if I would mind __________ (wait) for a few minutes.3. Everything seems __________ (go) smoothly.4. Here is another letter __________ (type).5. She was so upset that she couldn’t help __________ (cry).6. The soldiers were put in prison because they refused __________ (obey) orders.7. He remembered __________ (pass) on most of the information, but forgot __________ (mention) one or two of the most important facts.8. These plants don’t look good. They need __________ (water).9. The story __________ (amuse) the children. The children were __________ (amuse). The story was __________ (amuse).10. I found someone __________ (peep) through the keyhole when I happened __________ (look) at the door.11. __________ he will refuse the offer is unlikely.12. __________ will go with us has not yet been decided.13. __________ he managed to do it is more than I can tell.14. It seemed __________ the night would never end.15. __________ did this should be criticized.16. He asked me __________ I wanted.17. I wonder __________ the sound came from.18. She had demanded to know __________ that house was.19. __________ he will come or not is not easy to say.20. None of us knows __________ he should always arrive late.21. Everything __________ a computer does is dependent on the man __________ uses it.22. My sister, __________children are at school all day, is trying to get a job.23. There weren’t any movie theaters in the town __________ I spent my last summer.24. It was raining on the day __________ they arrived.25. The reason __________ they now charge more is that prices have kept rising.26. Peter, __________ I played tennis on Sundays, was fitter than I.27. The man __________ I’m sending this parcel is my partner.28. But water, __________ is well known, can also exist as a gas or a solid.29. This car, __________ I paid a lot of money, is now out of date.30. There are occasions __________ joking is not permissible.III. Error-correction.1.Perhaps surprisingly the main obstacles to realizing this dream is neither technicalA B C Dnor commercial.2.On each side of the highway was hundreds of billboards advertising everythingA B Cfrom modern motels to roadside stands that sell fresh fruit and bedspreads.D3.Red deer lives for about 12 years, although some have been known to live to anA B Cage of 20 years.D4.Although a majority of the houses in that area are still in need of repair, there haveA B Cbeen much improvement in their appearance.D5.The weeks of summer training are often as tense for sports writers as it is forA B C Dfootball players and coaches.6.Mr. Gilmore is one of those men who appears to be friendly. However, it is veryA Bhard to deal with him.C D7.The congressman, accompanied by secrete service agents and aids, are preparingA Bto enter the convention hall within the next few minutes.C D8.By the mid-1970s what had once been regarded as hostile to children’s bestA Binterests were considered essential to adult’s happiness.C D9.That intelligence tests actually give a measurement of the intelligence ofA Bindividuals are questioned by some eminent psychologists.C D10.A knowledge of the various works of art of the seventeenth century is essentialA Bbecause without them it is difficult to appreciate this artist’s style.C D11. Annoying at the long check-out lines, the shopper began to sigh loudly, tap his foot,A B C and glance at his watch.D12. No bank may keep enough cash paying all its depositors in full at once.A B C D13. Informing the patient of his grave illness risks to be destroying his hope so that heA B C Dmay recover more slowly.14. With Peter and my helping him, he was building a stone wall around the garden.A B C D15. If you work in a chemical laboratory, you should wear gloves so as to not exposeA B Cyour skin to harmful substances.D16. He cannot tell the difference between true praise and flattering statements makingA B C only to gain his favor.D17. Mr. Jankin regretted to blame his secretary for the mistake, for he later discovered itA B C Dwas his own fault.18. When I consider how talented he is as a painter, I cannot help but believing that theA B Cpublic will appreciate his gift.D19. Although we are concerned with the problem of energy sources, we must not failA B recognizing the need for environmental protection.C D20. The bell signaling the end of the first period rang loudly, to interrupt theA B Cprofessor’s closing comments.D21. 1. That his explanation comes to is that we can expect no further help from him.A B C D22. Contrary to that I had expected, the meeting failed to adopt either of the proposals.A B C D23. You must be aware of that what you are doing is quite illegal.A B C D24. The reason I didn’t go to the meeting was because I got an appointment.A B C D25. I don’t know that you can recognize her from here, but the girl reading theA B C Dnewspaper is Susan.26. My brother, that had been on a visit to the Philippines, returned last week.A B C D27. The police finally caught up with the man whom they thought was the escapedA B C D prisoner.28. Latin, from that the Roman languages are deprived, is rarely taught in AmericanA B C Dschools today.29. In the early morning, the first thing which both my brother and I did was to go outA B Cto see the pony.D30. It is a phenomenon known as temperature inversion what causes the worst smogA B Cin places such as Los Angeles.D31. I regret having left the work unfinished; I should plan everything ahead carefully.A B C D32. Judging by the noise that is coming from their room, I think that they must have aA B C D party.33. He was such a good swimmer that he could swim to a nearby island when the shipA B Csank in the sea.D34. To become a member of the civic association, one need only attend three meetingsA Band to pay his fees regularly.C D35. The house that was used to stand at this corner was destroyed during the bombingA B C Din 1940.36. No bank may keep enough cash paying all its depositors in full at once.A B C D37. With Peter and my helping him, he was building a stone wall around the garden.A B C D38. Beethovern, the great musician, wrote nine symphonies in his life, most of themAwere written after he had lost his hearing.B C D39. The bell signaling the end of the first period rang loudly, to interrupt theA B Cprofessor’s closing comments.D40. An organ is a group of tissues capable to perform some special functions, as, forA B Cexample, the heart, the liver, or the lungs.D41.Although the quantity was small, we had supplies enough to finish all theA B Cexperiments.D42.There was a very interesting news on the radio this morning about the earthquakeA B C Din Italy.43.Mineral prospectors use their knowledge of geophysics to locate deposits of oil,A B C uranium, and the other valuable minerals.D44.Danny spent such enjoyable vacation in Europe this summer that he plans toA B Creturn as soon as he saves enough money.D45.Prime Minister announced the names of those who were to be named to theA B CCabinet.D。
英语专业二级练习

Exercise 1 (Vocabulary)Vocabulary Test 11. He doesn't work but he gets a good ______ from his investment(投资).A) wage(尤指付给手工劳动者或非熟练工人的日薪或周薪:工资)B) earning(所赚的钱,收入)C) income(尤指工作或投资的:收入,所得,收益)D) salary(尤指专业人员或白领的年薪:薪水)2. You will have to repeat the course because your work has been _______.A) unpleasant(是人不愉快的,不合意的,讨厌的,不客气的)B) unnecessary(不必要的,多余的)C) unsatisfactory(不符合要求的,不足的,使人不满意的)D) unusual(罕有的,独特的,与众不同的,异乎寻常的)3. _______ , please make an effort to be punctual(严守时刻的,准时的,正点的).A) For future(for the future今后)B) In the future(将来)C) On a future day D) In future(今后)4. He _______ me by two games to one.A) beat(在比赛、竞争中战胜,击败)+人B) conquered(征服(人))C) gained(获得,得到,取得(想得到的、有利的或有利可图的事物))D) won(在(比赛,冲突)中获胜,赢)+比赛5. We are offering a substantial(大量的)_______ for the information leading to thecapture(俘获)of this murderer(凶手).A) allowance(津贴,零用钱)B)bonus(尤指额外给予的报酬(或礼物),,额外令人高兴的事情)C) prize(奖品,值得竞争的东西)D) reward(报酬,赏金,酬金)6. He lives within a short _______ of his place of employment.A) run B) distance+from C) walk D) leave7. _______ the rain, the football match has been cancelled.A) Owing to(由于,因为) B) Thanks to(幸亏,多亏)C) Due to(相当于形容词be due to) D)on account for(说明什么的原因)8. This jacket doesn't _______ me; It's too tight across the shoulders.A) fit B) meet C) reach D) match9. The speeding car _______ into a tree at the side of the road.A) splashed(溅起)B) crashed(撞)C) crushed(压碎)D) cracked(破裂,砸开)10. It will _______ time if we make the sandwiches the day before the picnic.A) cut down(减少)B) spare(抽出时间)C) win(赢得比赛)D) save(节省钱、时间或其他资源)11. Will you _______ my essay, please, to find out whether I made any mistakes?A) see through(做到底,帮助渡过难关,看穿)B) look through(仔细检查,细审)C)look up(向上看,改善,拜访,查找)D) look into(浏览,调查)12. All foreign merchants were made to pay heavy _______ on the goods they sold and bought.A) weights(砝码)B) prices(价格)C) tasks(工作)D) duties(关税)13. As the storm drew nearer, black clouds were _______ over the sky.A) smoothing(使光滑)B) wondering C) gathering(集合;聚集,累积)D) assembling((人为共同目的)聚集,集合)14. Fat people should _______ the temptation(诱惑)to eat a lot of sweet things.A) decline(谢绝)B) oppose(反对)C) resist(经得住,抗)D) deny(否认,拒绝)15. In his speech he _______ to the great help the club received from supporters.A) referred+to B) mentioned C) expressed D) talked16. In this job you must _______ up to(正视,勇敢接受)the problems and not run away from them.A) gaze B) face C) hold D) look17. The manager was pleased with the increased _______ from the factory.A) outlet(出口,出路)B) outcome(结果)C) outset(开始,开端)D) output(产量)18. Fruit pickers are paid at the _______ of £1 an hour.A) rate(比率,费用)B) scale(刻度,等级)C) price D) standard19. It was a long time before the cut on my hand _______ completely.A) healed(伤口自己愈合)B) recovered(人康复)C)improved(改良)D) resumed((中断后)重新开始,继续)20. We have discussed _______ the properties(性能)of this alloy(合金).A) aside from(除…之外,既…又…)B) at best(至多,充其量)C) at length(充分地,详尽地,最后)D) at most(至多)21. Susan is studying algebra(代数)and geometry(几何), and _______ she's taking microcomputer lessons.A) in a moment(一会儿,立刻,马上)B) in brief(简单地说,简而言之)C) in addition(另外)D) in conclusion(最后,综上所述)22. As chemists we _______ say that the new substance(物质)does notbehave(表现)like radium(镭).A) are about toB) are bound to(十分确定的)C) are at a loss to(茫然不知)D) are likely to23. Americans may have to _______ the number of privately ownedcars and depend more on public transportation systems.A) break down(损坏,粉碎,破产)B) cutdown(降低,减少)C) get down(使沮丧,下来,下车)D) drop down(突然下来,突然松开)24.The tenant(房客)must be prepared to decorate (装饰) theproperty ______ the terms(期限)of theagreement.A) by way of(途径,作为,意在)B) inaccordance with(依照,与..一致)C) with regard to(关于)D) in relation to(与…有关)25. Planes keep in touch with the control tower(指挥塔台)_______ .A) on the radio(广播中)B) by radioC) over the radioD) by the radio26. _______ , over the months, we began to get to know him.A) Time after time(多次,反复,不断地)B)From time to time(不时,偶尔,间或)C) One by oneD) Little by little(渐渐地)27. _______ I realized that I had left my briefcase(公文包)in the taxi!A) After allB) Once in a while(是不是,偶尔)C) All of a suddenD) Once for all(只此一次)28. This is not a good plant for your garden _______ its seeds are poisonous.A) with that(随即)B) in that(因为)C) so that(以便,结果)D) now that(既然)29. Mr. Walker's new _______ fitted so badly across the shouldersthat he took it back to the shop to complain.A) skirt(裙子)B) shirt(衬衫)C) sheet D) strap(肩带,背带,挎带)30. He put in(做,履行)a special _______ for an extra day's holidaysso that he could attend his daughter's wedding.A) request(请求)B) inquiry(打听,调查)C) enquiry(询问)D) proposal(建议,提议,求婚)31. If you make a cat angry it may _______ you.A) tear B) scrape(刮,擦伤)C) beat D) scratch(抓,搔)32. His new appointment takes _______ from the beginning of next month.A) place B) effect C) post D) possession33. Peter _______ the company for his father.A) runs B) works C) makes D) does34. Y oung as he is, the man has already won a _______ fame.A) common B) ordinary C) general D) universal (广泛的,普遍的)35. It is generally agreed that by the 1990's the world will besuffering from an energy _______.A) crisis(危机)B) dangerC) concern(忧虑,担心)D) emergency36. Sometimes they _______ their students' poor comprehension to a lack of intelligence.A) attribute(认为,归因于)B) distribute(分配)C) contribute(贡献,投稿)D) tribute(n.)37. I don't want to go into the sea. I'd rather lie on the _______A) coast B) beach C) bank D) seaport(海港)38. The football match was so dull(枯燥无味的)that most of the _______ left at half time.A) audience B) crowd C) public D) players39. He was busy when I phoned but I hung _______ until he was free.A) back (落在后面,缩在后面,不情愿行动,踌躇不前)B) off (畏缩不前,迟疑;不肯参加)C) up(猛地挂断,中止(与某人的)交谈)D) on(保持,保留)40. Y ou need a special _______ to go into this part of the building.A) permission(准许)B) allowance(津贴,零用钱)C) permit(许可,执照)D) consent(准许,同意,赞成)41. The other day I came _______ a really beautiful old house in theback streets of Birmingham.A) across B) overC) byD) down42. The police carried out a _______ search for the missing manager.A) through B) thorough C) throughout D) thoughtful43. He's so mean that he wouldn't give a beggar a _______ of bread.A) shell B) crust(面包皮)C) skin D) pie44. The elderly people in this country are entitled to(有资格)________ a special heating allowance(煤火津贴)from the government when they pass the age of sixty.A) claim(索取,声称)B) declare(宣布,申报)C) inquire(打听,询问)D) ask45. The explosion blew the kitchen door off its _______ .A) joints(关节,接合处)B) connections(连接点)C) hints (暗示,建议)D) hinges(铰链)46. I didn't mean to hit the cat, I was _______ at the tree.A) aching B) aiding(帮助)C) aiming(瞄准)D) attaining(实现,达到,得到)47. We need _______ information before we can decide.A) far B) farther C) further D) furthest48. He said the club was very _______ for the members' help and support.A) welcome B) agreeable C) willing D) grateful(感激的,感谢的)49. The suspect(嫌疑犯)'s fingerprints(指纹)on the gun were the main _______ against him.A) crime B) information C) fortune D) evidence50. It was a good game, and at the end the _______ was Scotland 4, Ireland 3.A) number B) score C) balance D) mark51. I'll have to _______ to you, otherwise he will hear.A) shout B) murmur C) whistle(吹口哨)D) whisper52. Since his retirement, Peter Smith, who was _______ a teacher, haswritten four novels.A) formerly(以前)B) usually C) presently(目前)D) already53. If your bicycle ______ comes off, it is almost impossible to put itback on without getting oil on your hands.A) ring B) belt C) steel D) chain(链)54. She began to feel nervous when the train pulled up(停下)at the_______ between Austria and Yugoslavia.A) limit B) edge C) bar D) border(边界)55. There was so little time that we had to run _______ to catch the bus.A) hardly(几乎没有)B) awkwardly(难看地,笨拙地,困难地,尴尬地)C) hard(努力地)D) strongly(强大地,坚固地)56. It is important that you reply to our letter without _______.A) pause B) stop C) rest D) delay(拖延,耽搁)57. He began to take politics _______ only when he left school.A) carefully B) gravely(严肃地,严重地)C) seriously(认真地,严肃地)D) solemnly(庄严地,正式地)58. In the central region the dry season is long and severe(严重的),and the _______ annual rainfall(年降雨量)is onlyabout 70 cm.A) refreshing(耳目一新的)B) generalC) average D) longest59. He apologized for his mistake, saying he did not _______ any offence(XX行为).A) suppose(料想,假定)B) intend(打算)C) consider D) propose(提议,建议)60. The chairman said it gave him great _______ to welcome so many guests.A) humour B) content(满足,满意)C) funD) pleasure(愉快,满足)Vocabulary Test 21. Please _______ that you promised to call your patient at two o'clock.A) have in mind(思念,存心)B) keep in mind(记住)C) make up your mind(决心,下定决心)D) keep your head(保持冷静)2. Weather satellites(气象卫星), communications satellites(通信卫星)and probes(探测器)have one feature(特征)_______;they are unmanned(无人操纵).A) in common B) in detailC) in bulk(大量,整批)D) in general3. The so-called even numbers(双数)are _______: 2,4,6,8.A) as a rule(通常,一般来说)B) as follows(列举如下)C) as follow(依下列各项)D) as a result(结果,因此)4. When Albert took to using perfume (香水),all the boys in theoffice began to _______ him.A) make room for B) make friends withC) make much of(重视,理解,疼爱)D) make fun of5. Although he thought he was helping us prepare the dinner, he was only _______ .A) in no way(绝不)B) in a way(在某种程度上)C) in the way (造成不便或阻碍)D) in one way6. Something must have _______ with the experiment.A) done wrong(作恶)B) made wrong C) got wrong D) gone wrong(走错路,误入歧途,发生故障)7. _______ the very cold winter, we have run out of coal earlier than we had expected.A) By reason of(由于,因为)B) For the sake of(为了)C) At the risk of(冒可能…的危险)D) At the mercy of(任..摆布,在..前毫无办法)8. Joe is very active in sports, _______ , he plays golf, baseball,football, and tennis.A) such as B) for exampleC) as such(依其身份,资格或名义等;本身)D) for one thing(首先,一那么)9. _______ small businesses are successful nowadays.A) Hardly ever(几乎从不,很少)B) Hardly someC) Hardly any(几乎没有)D) Hardly few10. Who is going to _______ all the damage that has been done?A) apply for(申请)B) allow for(考虑到,体谅,给予)C) answer for(对..负责)D) care for11. On summer _______ many English men work in their gardenswhen they come home from work.A) eves B) evenings C) nights D) days12. She tried to _______ out of the window to see the procession(队伍)more clearly.A) bend(屈身)B) curve(使弯成弧形)C) bow(鞠躬,低头)D) lean(倾斜)13. The snow has been _______ steadily for several hours and theground is completely covered.A) flickering(闪烁,摇曳)B) dropping(水滴)C) drifting(飘)D)falling14. The plate was right on the _______ of the table and could havebeen knocked off(碰撞掉)at any moment(随时).A) border(边界)B) tip(末端,尖端)C) margin(边缘抽象)D) edge(具体边)15. He had to go to the bank to _______ some money for his holiday.A) pay up(全部还清,付清) B) pay back(偿还,报复)C) draw out (取出,从银行提款)D) draw in(收债)16. The thieves _______ the papers all over the room while they weresearching for the money.A) scattered(散开,撒)B) scolded(责骂,斥责)C) screwed (旋,扭)D) scratched(抓,删掉)17. After a meal in a restaurant, you ask the waiter for the _______.A) bill B) noteC) receipt(收据,发票)D) cheque(支票)18. Like most models, she has a lovely(动人的)_______.A) figure(身材,体姿)B) frame(骨架)C) flame D) fashion(方式,样子)19. When an earthquake is bigger, we can feel the wall or the ground _______.A) vibrating(振动,振荡)B) swinging(摇摆)C) whirling (旋转)D) pulsing(脉动)20. The paper was so thin that the _______ of the pencil went right (彻底地)through it.A) end B) top C) edge D) point(尖儿)21. It is becoming increasingly difficult to grow enough food to_______ much of the earth's population from starvation.A) preserve(保护,维持)B) prevent(阻止,预防)C) defend(保卫,辩护)D) guard(保护,控制)22. David likes country life and has decided to _______ farming.A) go in for(参加,从事,喜欢,赞成)B) go back on(背弃)C) go through(检查,完成,练习,经受,讨论)D) go together(协调,伴随,相爱,互相牵扯)23. I hope my teacher will take my recent illness into _______ when judging my examination.A) account(账户,报道,描述)B) regard(注意,尊重,问候)C) observation(观察,言论)D) heart(内心,勇气,中心)24. The rocket went into _______ round the moon.A) track(踪迹)B) orbit(轨道)C) path D) course(航线)25. The girl who found the ring received a generous _______ of five pounds.A) prize B) allowance C) cash D) reward26. George spread the butter _______ on his bread.A) strongly B) highly C) thickly(厚厚地)D) deeply27. She did not come to the party, though she had _______ us she would.A) promised B) offered C) agreed D) accepted28. _______ of money prevented us from taking a holiday this year.A) Limit B) ShortC) Emptiness(空虚,空旷)D) Lack29. He must give us more time, _______ we shall not be able to makea good job of it.A) whether B) otherwiseC) consequently(所以,因此)D) therefore30. I have always _______ you my best friend.A) regarded+as B) considered sb. sth. C) trusted D) thought31. It was the longest film I had ever seen; it _______ four hours.A) continued B) sustainedC) lasted D) maintained32. These two circles are concentric (同心的). _______ , they have the same center.A) In other words(换句话说)B) In a word(总而言之)C) In a sense(在某种意义上)D) In any case(无论如何,还有)33. Y ou've had a dangerous fall, but I don't think you've _______ any bones.A) broken B) torn C) burst D) loosened34. These instructions are important, so listen while I _______ themagain.A) put through(实行,接通,通过)B) go with(相伴,赶时髦,和谁谈恋爱,同意)C) run overD) take on(承担,呈现,雇用)35. I _______ them to go by train, but they went by bus after all.A) proposed(提议) B) mentioned C) suggested D) advised36. After a long and exhausting(精疲力竭的)journey, they arrived _______.A) at the end(在…的末尾)B) at lastC) by the end D) at least37. Hans thinks he knows English well but, _______, he speaks very poorly.A) as a result B) as a rule(通常,一般说来)C) as a matter of fact(事实上)D) as yet38. _______ the sun, the moon looks the biggest object in the sky.A) Except for(除..之外,若不是)B) Except asC)As for(至于,就…方面说来)D) With exception(例外)of39. This fact _______ lessens(减少)the greatness(伟大,著名)of Newton's achievement.A) in nature(在世界上,实际上)B) in no way(绝不)C) in particular(尤其,特别)D) in practice(在实践中,开业)40. New sources of energy are being discovered _______ .A) all the time(一直,向来)B) at all events(不管发生什么事,无论如何)C) at any rate(无论如何,至少)D) for ever(永远,总是)41. I don't care whether you save your money or spend it; _______you should not waste it.A) in case(假使,以防,也许)B) in this case(既然这样)C) in that case(如果那样的话)D) in any case(无论如何,还有)42. Margaret didn't want to ask anybody for help, and finally shesolved the math problem _______ .A) to herself B) by herself C) in her ownD) by far(…得多,更,尤其)43. He was _______ with murder.A) accused(指责)+of B) arrestedC) charged(控告)+with D) sentenced(判决)+sth.44. I hope the weather will _______ before we leave for Brighton.A) clear off(消失,离开,廉价处理,完成)B) go off(离开,私奔,消失)C) clear up(放晴,治愈,解除,打扫干净)D) go away(离开,私奔)45. He has been working on his term paper for quite a _______.A) time B) period C) term D) while46. The bill came to over a thousand dollars _______.A) at all(根本)B) in all(总共)C) to all D) of all47. He sat there with his arms _______ doing nothing, waiting for us.A) folded(折叠)B) flapped(轻拍,焦虑)C) turned D) twisted(扭)48. I had to think _______ before I remembered his name.A) at the moment(此刻,目前)B) in a moment(一会儿,马上)C) for a moment(片刻,一会儿)D) for the moment(暂且,目前)49. The government plans to _______ the price of gasoline(汽油).A) rise B) raise C) heightenD) strengthen50. A new spaceship was _______ at Cape Kennedy yesterday.A) transmitted(发射电子信号)B) propelled(推进)C) fired D) launched(发射)51. Suddenly there was a _______ of lightning followed by a clap(霹雳)of thunder.A) ray B) flash C) stream D) flame52. There was no one in the house, but the _______ of a meal lay on the table.A) remains(残余,遗体)B) remainders(剩余物)C) ruins(遗址)D) records53. Few articles in the newspaper _______ more attention than thatreporting the rape(强奸)case with Bryant involved.A) absorb B) divert(转移,得到消遣)C) draw D) enlist(获得,参军)54. My phone is out of order, which is a _______.A) hurt B) harm C) trouble D) nuisance(讨厌的东西)55. When you come tomorrow, why not _______ your brother with you?.A) fetch B) take C) bring D) carry56. _______ management is one of the factors which will lower production cost.A) Effective(有效的)B) Efficient(效率高的)C) Sufficient(足够的)D) Inefficient57.I didn’t know what to do but then an idea suddenly _________ to me.A) happened B) enteredC) occurred D) hit58. Beer has a very _______ smell; it’s quite _______ from the smell of wine.A) distinctive(与众不同的)… distinct(截然不同的)B) distinct …distinctiveC) distinctive … distinctiveD) distinct … distinct59. The actual _______ by which coal is extracted(提取)is well wroth watching.A) pattern B) process C) procession D) fashion60. Nowadays many Asian students go abroad. In their own countriesthey do not always have _______ to universities and libraries.A) excess(过度,超过)B) accent(口音,中音,重点)C) acces(通道,通知书)D) admissionVocabulary Test 31. The town stands mainly(大部分)on the left _______ of the river.A) slope(斜面) B) coast(海岸)C) bank D) shore2. The clock was _______ eleven as I went upstairs to bed.A) beating B) striking C) ringing D) clapping3. Some people enjoy training; for others it is only a _______ to an end(目标,结果).A) means(手段,方法)B) methodC) way D) tool4. Come on, _______ up your sleeves(衣服袖子)and start work.A) push B) turn C) roll D) fold5. Two dogs were fighting, and she tried to _______ them with her umbrella.A) separate B) break C) split(使破裂)D) divide6. _______ applicants(求职人)have already been interviewed.A) The number of B) Large number ofC) A number of D) Many numbers of7. _______ , let's play some records, and then let's go out and have something to drink.A) At first(起初,状语)B) First of all(首先,插入语)C) For the first time(第一次)D) In the first place(首先,(指行动尚在计划或讨论时))8. The cost of the operation will need to be _______ very precisely (精确地).A) carried out(实施)B) cut out(剪下,停止,取代)C) filled out(填写,长胖,充实)D) figured out(计算出弄明白)9. Helping his son with his physics homework reminded him of things he'd long(长时间)_______.A) cared about B) dreamed aboutC) forgotten about D) complained about10. Mark Twain _______ the story _______ his experiences in thewest.A) adapted...for B) adapted...toC) made up...from D) based...on11. It’s rather bad ________ to introduce a new hot-pot(罐焖土豆烧肉) product in summer.A) plan B) timing(时间的选择)C) schedule D) scheme(诡计)12. The old man got into the _______ of storing money under the bed.A) tradition B) manner C) custom D) habit13. The captain’s _______ is near the bridge(驾驶台)of the ship.A) hut B) cottage C) flat D) cabin(驾驶舱)14. The young people of today seem to believe in _______ more than(不只是)clothes and pop music.A) not B) none C) nothing D) no15. We expected him at eight but he finally _______ at midnight.A) came to B) turned out(关灯,制造,结果是)C) turned up(出现)D) came off16. I am _______ of making excuses for your rudeness to our friends.A) annoyed B) angry C) worried D) tired17. A considerable(相当大、多的)amount of time and money hasbeen invested in(投资,投入)_______ this latest video recorder.A) effecting B) affecting C) interpreting D) perfecting18. There is an _______ of violence in the movies produced in Hollywood.A) adequacy(足够,胜任,适当) B) surplus(过剩)C) excess(超过,过度)D) abundance(大量,充足)19. After a thorough(彻底的)search, the police _______ most of the missing jewels.A) retreated(撤退)B) refreshed(使恢复)C) recorded(记录)D) recovered(重新获得)20. It was a minor illness, and she soon _______ it.A) got around(到处走动,传播出去)B) got over(恢复)C) got on with(继续做)D) got out of(避免,使说出)21. Y ou'll have to buy some new shoes as these are _______.A) used up B) wasted away(变得衰弱)C) broken down D) worn out22. Try some of this cake, which I _______ especially for you.A) boiled B) baked C) burned D) roasted(烤肉)23. She came into the kitchen and asked how I was _______ on with the cooking.A) getting(继续干…)B) going C) moving D) working24. Bill doesn't _______ what people say about him.A) concern(忧虑,担心)B) care C) matter D) disturb25. Write to me and tell me ________ about your holiday inSwitzerland(瑞士).A) every B)all C)much D)some26. She has _______ an impressive collection of coins and stamps..A) gathered B) accumulated(堆积,积累)C) saved D) assembled(集合,搜集)27. I am not in the least(毫无,全无)_______ about his opinion.A) aware B) concerned C) interested D) regarded28. The road was so icy, the drivers had trouble stopping their cars from _______ .A) drifting B) sliding C) sketching(素描)D) sloping29. This _______ was conducted to find out how many people prefer cycling(骑脚踏车兜风).A) analysis B) survey C) inspection(视察)D) investigation(正式的)30. _______ risk leaving any mistakes, I'd check the whole thing again.A) Other than(除了,绝不是)B) Rather than(与其…倒不如,宁愿)C) Had rather(宁愿,宁可)D) Once for all(只此一次)31. It's surprising that this innocent-looking person should have_______ such a crime.A) performed B) made C) actedD) committed(犯罪,承诺,托付)32. I saw a _______ good film on TV last night.A) lovely B) handsome C) pretty(adv.相当,颇) D) nice33. I should have been quite willing to lend him the book he asked for,but I hadn't it with me _______ .A) at the moment(此刻,目前)B) for the moment(暂时,目前)C) at this moment(此刻,现在,目前)D) for a moment(片刻,一会儿)34. Y ou cannot see the doctor _______ you have made an appointment with him.A) except B) even C) unless D) however35. They're having a party, and they hope you don't _______ the noise.A) mind B) care C) blame D) object36. The office lifts are out of _______ again.A) operating B) order C) work D) working37. He was pleased to have the _______ to hear such a fine musicianplay his favorite piece of music.A) occasion(时刻,场合)B) possibilityC) fate(命运,死亡)D) opportunity38. The curtains were put up only three months ago, but they have _______ badly.A) shaded B) paled(变得苍白,暗淡)C) lightened D) faded39. With business improving they _______ make money this year.A) are set to(开始努力干,打起来,大吃起来)B) are bound to(一定要)C) are used to D) are up to40. Women workers wear hats in _______ their hair gets caught in the machinery(机器).A) course B) occasion C) event D) case41. If you feel ill, the doctor usually _______ your temperature.A) inspects B) looks up C) examines D) takes(测定,量)42. “Sorry I'm late. Am I still _______ for some coffee or has the meeting started?”A) in time(迟早,最后,及时)B) on time(按时,准时)C) at times D) at a time43. Wherever people live and whatever they _______ , many of theirrequirements are the same.A) look after B) look into C) look alike D) look like44. I looked out of the window to wave good-by(再见)to Bill andJohn, but they had already turned the corner and were _______ .A) out of reach(手够不着,达不到)B) out of sight(看不见,在视野之外)C) out of place(不在应在的位置,不合适,不协调)D) out of hand(无法控制,立即,终于)45. The water was so clear that it _______ the trees on the river bank.A) shadowed(遮蔽,跟踪)B) shaded(遮蔽)C) shone D) reflected(反射光,热,声,影像)46. Hello! Aviation Electronics(航空电子学)? Could I speak to Mr. Jones on _______ 8183, please?A) branch B) extension(分机)C) system D) exchange47. According to the weather _______ , it's going to be fine today.A) prediction B) indication(指示,象征)C) announcement D) forecast48. It’s not safe to carry valuables around here. You’d better _______them in the hotel safe with your passport..A) save B) hideC) deposit(放置,存放,付定金)D) pack49. He was _______ from the firm because he was always late for work.A) sacked(解雇)B) retiredC) removed D) disposed(处理)50. We all _______ her for the way she saved the children from the fire.A) admired B) approvedC) appealed D) amazed51. We all knew from the very(极端的)_______ that the plan would fail.A) outcome(结果)B) outlet(出路,发泄的途径,经销店)C) outline(提纲,轮廓)D) outset(开始)52. I held the little bird in my hand and felt its heart _______ .A) bumping B) leapingC) striking D) beating53. If you _______ in taking this attitude, we'll have to ask you to leave.A) persist(坚持,固执)B) insist(坚持认为)C) resist(抵抗)D) pursue(追捕,追求,从事)54. There is no _______ in applying for(申请)that job as you are not properly qualified(有资格的,胜任的).A) reason B) point(目的,意图)C) thought D) cause55. Most people, if asked to prove that the earth is round, would noteven _______ to produce the arguments I have mentioned above.A) interrupt(打断)B) disturbC) pause D) bother56. As a result of the radio _______ for help for the earthquakevictims, over a million pounds has been raised.A) appeal(呼吁)B) call C) broadcast D) request57. She was singing an old Spanish folk song(民歌), a favorite of _______ .A) her B) hers C) herself D) her own58. What do you _______ to do about the problem now that this solution has failed?A) attempt B) think C) pretend D) intend59. Our main concern is to raise the voters' _______ of living.A) standard(平均质量,水准)B) capacity(容量,才能,身份)C) degree D) conditions60. There is an increasing _______ nowadays to make films describing violence.A) trend B) stream C) direction D) traditionVocabulary Test 41. The water could not flow freely because the pipe was _______.A) blocked B) trapped C) loaded D) jammed2. At that time they were poor, and they went _______ a difficult time.A) down B) along with C) in for D) through3. She was so _______ with the noise that she sent the children to bed.A) taken over B) blown out C) eaten away D) fed up4. I shall never manage to beat John at tennis; we are clearly not in the same _______.A) set B) band C) group D) class5. When I came through the customs at the airport, I had to pay_______ on a clock I had bought.A) taxes(税捐)B) duty(税收)C) fines D) rates(比率,费用)6. Because of ill health, she has been obliged to(不得不)_______ her job.A) resign(辞职,放弃)B) dismiss(解雇)C) depart(离开,出发)D) give off(发出)7. The peoples of the African interior(内地) began to _______ goldin exchange for the goods they need from abroad.A) afford B) offer C) receive D) accept8. It is only _______ the powerful new digital computers thatworthwhile prediction in human affairs has been possible at all.A) in regard to(关于…) B)on account toC) prior to(在…以前;先于;优先于)D) thanks to(幸亏;由于,因为)9. For safety’s _______, we postponed the meeting three days.A) reason B) sake(缘故; 理由)C) consideration D) cause10. I'm quite willing to do what you ask, but it's _______ finding the time.A) a lot ofB) a matter of(...左右, ...上下, 只是...的问题而已, 只需, 大约)C) a series of D) a variety of11. _______ competition from the air, the shipping-lines have wiselyconcentrated on selling comfort and leisure(空闲,闲暇).A) In front of B) In the front ofC) In the face of D) At face of12. The elevator was _______ and we had to walk to the tenth floor.A) out of date(过时的,老式的)B) out of order次序紊乱,失灵; 出故障;有病.违反议事规那么C) out of fashion(不流行)D) out of place(不在合适的位置;放错地方)。
生物专业英语课后练习题含答案

生物专业英语课后练习题含答案1. Multiple Choice1.Which of the following is the most important considerationwhen designing a polymerase chn reaction (PCR)?A. The length of the primerB. The temperature of the PCRC.The amount of DNA in the sample D. The thermal stability of the DNA polymeraseAnswer: D2.Which of the following describes the function of arestriction enzyme in molecular biology?A. Restriction enzymes are used to replicate DNA.B.Restriction enzymes are used to sequence DNA. C. Restrictionenzymes are used to cut DNA at specific sites. D. Restrictionenzymes are used to amplify DNA.Answer: C3.The gel electrophoresis separates DNA fragments according towhich of following parameters?A. SequenceB. SizeC. ConcentrationD. ChargeAnswer: B4.Which of the following is not a component of a typicalprokaryotic cell?A. NucleusB. Cell wallC. RibosomeD. PlasmidAnswer: A5.Which of the following is responsible for the majority ofoxygen production on Earth?A. FungiB. AlgaeC. ProtozoaD. BacteriaAnswer: B2. Short Answer1.What is the difference between genotype and phenotype?Genotype refers to the set of genes an organism carries, while phenotype refers to the observable trts that result from the interaction between the organism’s genes and its environmen t.2.Describe the process of translation.Translation is the process by which the information encoded in mRNA is used to synthesize a protein. It occurs on ribosomes, which contn two subunits (the small subunit and the large subunit).The process begins with the small subunit binding to the mRNAmolecule; this initiates the process of recognition of the start codon (AUG). Once the start codon is identified, the ribosome will recruit the first tRNA (transfer RNA) molecule, which carries an amino acid. The amino acid is then added to the growing peptide chn as the ribosome moves along the mRNA molecule, one codon at a time. This continues until a stop codon is reached, at which point the ribosome releases the newly synthesized protein, and the mRNA molecule is degraded.3.What is the difference between prokaryotic and eukaryoticcells?Prokaryotic cells are simpler in structure than eukaryotic cells and do not have a nucleus or membrane-bound organelles. They are typically much smaller than eukaryotic cells. Eukaryotic cells, on the other hand, have a nucleus and many membrane-boundorganelles (such as mitochondria, chloroplasts, and theendoplasmic reticulum). They are generally larger and more complex than prokaryotic cells.3. True or False1.Bacteria are always harmful to humans.False2.The most diverse group of organisms on Earth is arthropods. True3.The Calvin cycle is the process by which photosynthesisoccurs.True4.Fungi are eukaryotic organisms that are primarilydecomposers.True5.RNA splicing removes introns from the primary RNA transcript,leaving only exons.True4. MatchingMatch the following terms with their correct definition or function:1.EnzymeC. Protein molecule that acts as a catalyst in a biochemicalreaction2.GlycolysisD. The process by which glucose is broken down into pyruvate3.MitochondriaA. Organelle responsible for cell respiration4.NucleusB. Organelle responsible for the storage and transmission ofgenetic informationAnswer:1.C2.D3.A4.BConclusionThis set of practice questions is designed to test your understanding of some of the key concepts in biology. By exploringtopics like genetics, cell structure, and molecular biology, you can gn a deeper appreciation for the complexity and diversity of life on Earth.By engaging with these questions and testing your knowledge, you can become a more confident and capable biologist.。
专业英语四级(听力)练习试卷1(题后含答案及解析)

专业英语四级(听力)练习试卷1(题后含答案及解析) 题型有:1. DICTATION 2. LISTENING COMPREHENSIONPART I DICTATION (15 MIN)Directions: Listen to the following passage. Altogether the passage will be read to you four times. During the first reading, which will be read at normal speed, listen and try to understand the meaning. For the second and third readings, the passage will be read sentence by sentence, or phrase by phrase, with intervals of 15 seconds. The last reading will be read at normal speed again and during this time you should check your work. You will then be given 2 minute1.正确答案:Unemployment Most people are much more frightened by being unemployed than they need to be. / Being unemployed certainly has disadvantages, /but there are good things about it too./ One advantage is that you don’t have to get up early to go to work in the rush hour. /You can stay in bed as long as you like, /and there is plenty of time to read the newspaper and have a leisurely breakfast. /But the best thing of all is that you are your own boss and there is no one to tell you what to do and when to do it. / One drawback of being unemployed is that you haven’t got much money coming in/--having a job at least enables you to save a lot of money to go on holiday. /On the other hand, /when you are unemployed you needn’t go on holiday, /because you are on holiday already. /In fact, the main trouble is that you have to spend much time looking for a job. /解析:这篇听写材料属于议论性质。
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1、One summer, Bill Smith decided to earn money as a lawn (草坪)service professional. He solicited(请求)business in the neighborhood and obtained (获得,得到)enough lawn servicing jobs that he thought he could be successful at it. On the basis of these commitments, Bill went to the bank, withdrew(收回) $2,000 of his savings and deposited the funds(资金)in a business bank account. At the end of the summer, Bill tried to figure out how well he’d done. He examined his business bank account checkbook and noted the following:▪Deposits(存款), all from customer collections, totaled $11,400.Checks written:▪Truck and equipment rental(卡车及其设备的租金), $1,800 ▪Gas, oil, and lubrication(润滑剂), $880▪Miscellaneous supplies used(杂用品的使用), $90▪Helpers, $4,700; including payroll taxes, $500▪Insurance(保险), $175▪Telephone, $100▪Transfer from business bank account to his personal savings account (从商业用行账户转移到他的个人储蓄账户), $2,000.Bill also had records that showed:▪Customers still owed him $600 for services that were performed. ▪He still owed another $100 to a vendor(厂商)for gas and oil.Required:1. Show the effect of each transaction on the accountingequation.2. Prepare an income statement for Bill for his summer business.3. Prepare a balance sheet for Bill at the end of the summer.4. Explain why the company’s cash balance at the end of thesummer does not agree with the amount of net income earned during the summer.accounting period is as follows:LARGE COMPANY, INC.Trial BalanceDecember 31, 2007Cash .......................................................................... $ 4,00Prepaid Insurance ................................................... 1,600Supplies .................................................................. 2,100 Equipment .............................................................. 20,000 Accumulated Depreciation—Equipment ............... $ 2,000 C. Large, Capital .................................................... 19,000 C. Large, Withdrawals ............................................. 2,000 Revenue ................................................................... 33,000 Salaries Expense ..................................................... 18,300Rent Expense .........................................................______6,000Totals ........................................................................ $54,000 $54,000 Additional information:1. Expired insurance, $600.2. Unused supplies, per inventory, $800.3. Estimated depreciation, $1,000.4. Earned but unpaid salaries, $700Required :1. Prepare adjusting entries.2. Prepare closing entries.3. Prepare a post-closing trial balance.and supplementary data for the Whisk Company.Merchandise inventory, beginning ................................................ $ 20,000 Merchandise inventory, ending ..................................................... 23,000 Purchases ........................................................................................ 215,000 Purchases discounts ...................................................................... 6,000 Purchases returns and allowances ............................................... 3,000 Sales ................................................................................................. 400,000 Sales discounts ............................................................................... 3,200 Sales returns and allowances ........................................................ 1,800 Transportation-in ............................................................................. 10,000 Required:Show the computation, in Income Statement format, of net sales,cost of goods sold, and gross profit for the year ended December31, 20XX.ABC Company issued $200,000 face value bonds on January 1, 2007, with semiannual interest payments to be made on June 30and December 31 at a contract rate of 10%. The bonds were scheduled to mature five years after they were issued. Threeyears after they were issued, on January 1, 2010, the company repurchased 40% of the outstanding bonds for $79,000.Required:Part A1. Assume that the bonds were issued when the market rate ofinterest was 9%. Prepare a schedule showing the bondinterest expense and amounts of amortization for the life of thebonds.2. Prepare the journal entry to record the bond issuance.3. Prepare journal entries for the first two interest payments.4. Prepare the journal entry to recognize the partial repurchase ofthe bonds.reconciliation for the month of June. When the bank statement for the month of June arrives from the bank, the following steps are performed:1. The deposits to the bank account, as recorded on the bankstatement, are compared to the deposit slips retained by the company. It is noted that the last deposit, of $400, occurred after banking hours on the day of the bank statement and therefore has not been recorded by the bank on this bank statement.2. Checks returned with the bank statement are compared to thechecks written and listed in checkbook. This comparison shows that there are checks outstanding amounting to $1,456.3. The ending bala nces on the statement and in the company’sbooks are determined. The ending bank statement balance is exactly $10,129 whereas the books show $9,000.4. Other information contained on the bank statement, notpreviously known to the company, is determined. This includes the following: (a) a note from a customer for $200 has been collected by the bank and credited to our account; (b) a check from Frank Ony for $120 previously deposited by us has been returned for lack of sufficient funds; (c) the bank has charged us $25 for its services (this includes a $10 fee for the NSF check).5. A bank reconciliation is prepared; it does not balance! Thedifference is $18, so a transposition error is looked for (whenever the difference is a multiple of 9, there is a very good chance that there has been an inadvertent exchange of two digits (for example, writing 29 when it should have been 92). An error is found. Check number 141 was written for $235 and cleared the bank for $235, but was recorded in the company records as $253.Required:Prepare a bank reconciliation for the Betsy Dough Company at June 30, 2007.5、A new machine costs $120,000, has an estimated useful life of five years and an estimated salvage value of $15,000 at the end of that time. It is expected that the machine can produce 210,000 widgets during its useful life.The New Times Company purchases this machine on January 1, 2006, and uses it for exactly three years. During these years the annual production of widgets has been 80,000, 50,000, and 30,000 units, respectively. On January 1, 20X9, the machine is sold for $45,000.Required:1. Calculate the depreciation expense for each of the first threeyears using:a. Straight-lineb. Units-of-productionc. Double-declining-balance2. Prepare the proper journal entry for the sale of the machineunder the three different depreciation methods.6、ABC Company issued $200,000 face value bonds on January 1, 2007, with semiannual interest payments to be made on June 30 and December 31 at a contract rate of 10%. The bonds were scheduled to mature five years after they were issued. Three years after they were issued, on January 1, 2010, the company repurchased 40% of the outstanding bonds for $79,000. Required:Part AAssume that the bonds were issued when the market rate of interest was 9%. Prepare a schedule showing the bond interest expense and amounts of amortization for the life of the bonds.Prepare the journal entry to record the bond issuance.Prepare journal entries for the first two interest payments.Prepare the journal entry to recognize the partial repurchase of the bonds.思考题Pls describe the closing process and analyze why an organization need closing at the end of a certain period?1、Pls describe accounting equation and explain why3 Pls describe accoung on plant assets’subsequent expenditure and explain what is capital expenditure4.Pls decribe all acounting treatment about retail earings and the related accounting transaction5 Pls explain major financial statement’s analysis method and describe major financial ratio.。