专业英语课后习题答案
专业英语课后习题答案
专业英语课后习题答案Chapter1I. 1.Application software2. -128 1273. system software4. hardware system software system5.microcomputers, minicomputers, mainframe computers, supercomputersII. 1. false 2. false 3. false 4. true 5.trueIII. (1) b (2) c (3)a (4) dIV. (1)编码技术(2)应用软件(3) 浮点数据(4)分时(5)存储容量VIII．1.By using various coding techniques, groups of bits can be made to represent not only binary numbers but also other discrete symbols通过应用多种编码技术，一组二进制数字不但可以表示二进制数据，而且还可以表示其它的离散符号2.System software includes not only the complex programs used by technicians to create application software in the first place but also the organizational programs needed to start up the computer and govern its use of other programs.系统软件不仅包括技术人员用于创建应用软件的复杂程序，而且还包括用于启动计算机和提供给其他程序使用的管理程序。
3.Data are numbers and other binary-code information that are operated on to achieve required computational results.数据是数字和其他的二进制代码信息，通过处理这些数据得到所需要的计算结果。
制药工程专业英语课后练习题含答案 (2)
制药工程专业英语课后练习题含答案题目一：Drug Substance Manufacturing1.What is Drug Substance Manufacturing?–A. It is the process of producing a finished drug product.–B. It is the process of producing the activeingredient or drug substance used in a drug product.–C. It is the process of packaging and labeling a finished drug product.–D. It is the process of performing clinical trials ona drug product.Answer: B. It is the process of producing the active ingredient or drug substance used in a drug product.2.What are the steps involved in Drug Substance Manufacturing?–A. Synthesis, isolation, and purification.–B. Packaging, labeling, and testing.–C. Clinical trials, manufacturing, and distribution.–D. None of the above.Answer: A. Synthesis, isolation, and purification.3.What is the mn purpose of Drug Substance Manufacturing?–A. To produce a finished drug product for human use.–B. To provide the active ingredient or drug substance used in a drug product.–C. To test and validate the safety and efficacy of a drug product.–D. To distribute a drug product to consumers.Answer: B. To provide the active ingredient or drug substance used in a drug product.题目二：Pharmaceutical Formulation1.What is Pharmaceutical Formulation?–A. It is the process of producing a finished drug product.–B. It is the process of selecting and combining ingredients to produce a drug product.–C. It is the process of packaging and labeling a finished drug product.–D. It is the process of performing clinical trials ona drug product.Answer: B. It is the process of selecting and combining ingredients to produce a drug product.2.What are the key considerations in PharmaceuticalFormulation?–A. Safety, efficacy, and stability.–B. Cost, avlability, and taste.–C. Appearance, texture, and smell.–D. None of the above.Answer: A. Safety, efficacy, and stability.3.What is the role of excipients in Pharmaceutical Formulation?–A. They are the active ingredients in a drug product.–B. They are the inactive ingredients in a drug product that help to improve its properties.–C. They are the ingredients in a drug product that are responsible for the color and flavor.–D. None of the above.Answer: B. They are the inactive ingredients in a drug product that help to improve its properties.题目三：Good Manufacturing Practice (GMP)1.What is Good Manufacturing Practice (GMP)?–A. It is a set of regulations and guidelines that ensure the quality and safety of pharmaceutical products.–B. It is a set of regulations and guidelines that ensure the efficacy of pharmaceutical products.–C. It is a set of regulations and guidelines that ensure the affordability of pharmaceutical products.–D. None of the above.Answer: A. It is a set of regulations and guidelines that ensure the quality and safety of pharmaceutical products.2.What are the key components of Good Manufacturing Practice(GMP)?–A. Quality control, documentation, and facility design.–B. Clinical trials, manufacturing, and distribution.–C. Cost control, inventory management, and customer service.–D. None of the above.Answer: A. Quality control, documentation, and facility design.3.Why is Good Manufacturing Practice (GMP) important?–A. It helps to ensure the quality and safety ofpharmaceutical products.–B. It helps to reduce the cost of producingpharmaceutical products.–C. It helps to increase the avlability ofpharmaceutical products.–D. None of the above.Answer: A. It helps to ensure the quality and safety of pharmaceutical products.总结本文介绍了制药工程专业英语中的几个重要概念和术语，包括Drug Substance Manufacturing（药品物质制造）、Pharmaceutical Formulation（制剂开发）以及Good Manufacturing Practice（良好生产规范）。
旅游专业英语第二版课后练习题含答案
旅游专业英语第二版课后练习题含答案一、填空题1.The person who makes travel arrangements for tourists iscalled a ___________.–Answer: travel agent.2.rfares are sometimes discounted for passengers who______________.–Answer: book their tickets in advance.3.Tourists who don’t want to spend a lot of money onaccommodations can stay in a _____________.–Answer: hostel.4.Travelers who prefer to plan their own trips without using atour operator are called _____________.•Answer: independent travelers.5.Foreign visitors to a country are sometimes required to obtna _______________ before they are allowed to enter.•Answer: visa.二、选择题1.Which of the following documents is required for entry tosome countries?–A. Passport–B. Driver’s license–C. Birth certificate–D. Social security cardAnswer: A. Passport2.If you want to travel to the United States, what do you needto have?• A. A passport and a visa• B. A driver’s license and a passport• C. A birth certificate and a visa• D. A social security card and a passportAnswer: A. A passport and a visa3.Which of the following accommodations usually offers thelowest room rates?–A. Hotel–B. Motel–C. Hostel–D. ResortAnswer: C. Hostel4.What is a tour operator?• A. A person who organizes travel for other people• B. A person who provides travel information• C. A person who provides transportation for tourists• D. A person who works in a travel agencyAnswer: A. A person who organizes travel for other people5.Which mode of transportation is usually the most expensive?• A. Plane• B. Trn• C. Bus• D. CarAnswer: A. Plane三、阅读理解Tourism is an important industry in many countries around the world. Tourists travel for different reasons, such as professional development, cultural enrichment, and personal relaxation. However, tourism also has some negative impacts on the environment and local communities.One way to reduce the negative impacts of tourism is to promote sustnable tourism. Sustnable tourism is a type of tourism that conserves the natural and cultural environment while providing economic benefitsto local communities. It is a way to balance the needs of tourists, the environment, and the local community.To promote sustnable tourism, some hotels and tour operators have adopted sustnable practices, such as recycling, energy conservation, and the use of local materials. In addition, tourists can also contribute to sustnable tourism by choosing eco-friendly accommodation and activities, respecting local customs and traditions, and supporting local businesses.However, promoting sustnable tourism requires the cooperation of all stakeholders, including the government, the tourism industry, local communities, and tourists. Sustnable tourism is not only good for the environment, but it also benefits the local economy and enhances the travel experience of tourists.1.What is sustnable tourism?–Answer: Sustnable tourism is a type of tourism that conserves the natural and cultural environment whileproviding economic benefits to local communities.2.What are some sustnable practices that hotels and tour operators can adopt?–Answer: Some sustnable practices that hotels and tour operators can adopt include recycling, energy conservation, and the use of local materials.3.How can tourists contribute to sustnable tourism?–Answer: Tourists can contribute to sustnable tourism by choosing eco-friendly accommodation and activities,respecting local customs and traditions, and supportinglocal businesses.4.Who needs to cooperate to promote sustnable tourism?–Answer: Promoting sustnable tourism requires the cooperation of all stakeholders, including the government,the tourism industry, local communities, and tourists.5.What are the benefits of sustnable tourism?–Answer: Sustnable tourism benefits the environment, the local economy, and enhances the travel experience oftourists.。
专业英语1-6单元课后练习答案
Chapter 1Exercisesplete the following sentencesB.Give the meaning for the following combining forms, prefixes, and suffixes and provideSection B ReadingsPassage One Human BodyIn this passage you will learn:●Classification of organ systems●Structure and function of each organ system●Associated medical termsExercisesA.Discuss the following topics1.Why do we study anatomy and physiology?Because it is necessary to understand how human body’s parts are put together and howthey function.2.Suppose you were a professor of anatomy trying to introduce the human body to yourstudents at the first class, where would you like to begin and how would you like toproceed?(how many systems are there in the human body? What are they?)Firstly, name the ten systems usefully classified by anatomists, that is …; then use onesentence to introduce the composition and their functions.3.Give brief accounts of the structures and functions of each organ system.The first two sentences of each paragraph have given the answers and find them out.B.Rewrite the following sentences in your own way and use phrases and expressions youare familiar with.Fox example:The digestive system consists of a tube extending from the mouth to the arms.The digestive system begins at the mouth and ends at the anus and the whole system described as a tube.1.The skeletal system is composed of bones, joints between bones, and cartilage.The skeletal system consists of bones, joints and soft bones.2.The contraction of the muscular system produces heat, which helps maintain a constant bodytemperature.Heat is generated when muscles are contracted, which helps keep the body temperatureconstant.3.The circulatory system distributes needed materials and removes unneeded ones.The circulation of blood carries useful materials to all body cells while removing waste ones.4.The respiratory system takes in oxygen from the air and expels carbon dioxide and watervapor.Oxygen is inhaled and carbon dioxide is exhaled in the process of respiration.5.The breakdown (of food), known as digestion, is both a mechanical and a chemical process.The digestion of food involved both mechanical and chemical procedures.6.The urinary system maintains normal levels of water and of certain small molecules such assodium and potassium in the body.The urinary system keeps normal levels of water and of certain chemicals in the body.7. A major gland is the pituitary, which is located under the brain in the middle of the head.A major gland is the pituitary, which is located under the brain in the milled of the head. Thepituitary is a major gland located under the brain in the middle of the head.8.The information is processed by the brain, and then messagesare carried back to muscles andglands throughout the body.The brain collects and processes information and then sends instruction to all parts of body to be carried out.9.The male reproductive system is responsible for producing, transporting and maintainingviable sperm.The main function of the male reproductive system is to generate, transport and keep active male sex cells.10.The skin is a complete system that protects the inner structures of the body, and it is thelargest of the body’s organs.The largest of the body’s organs, the skin protects the inner structures of the body with acomplete layer.C.Put the following words or phrases into the following sentences and change the form if1.The blood is also part of the body’s defense system. It has __ (antibodies) ___andleukocytes that protect the body against foreign invaders.2.The skin is a complete layer that protects the inner structures of the body and it is thelargest of the body’s organs. Hair and nail are __ (accessory) ____structures of the skin.3.The human skin is covered with plenty of nerves and any touch on it provides _ (tactile)__information to the central nerve system.4.The function of __（skeleton system）__is to provide support and protection for the softtissues and the organs of the body and to provide points of attachment for the muscles that move the body.5.When we breathe, we inhale fresh air with oxygen and _ (exhale) _ ____carbon dioxide.6.The body’s temperature can be lowered by __ (evaporation) ___of sweat from the skin.7.An infant’s skeleton is made of _ (cartilage) __that is gradually replaced by bone as theinfant grows into adult.8.__ (Striated muscles) ___can be consciously controlled and therefore is called voluntarymuscle.9.When __ (ovas) __are not fertilized by sperm, they are to be eliminated from the body.10.When liquid remainder of food enters the colon, most of the fluid is absorbed and therelatively dry _ (residues) ___are expelled.Passage Two Cells and TissuesExercisesA.discuss the following topics1.Why do the body systems have to work as a whole despite the fact that each systemserves its specific function?It is because no system is independent of the others; they work together to maintain thebody’s state of internal stability, termed homeostasis.2.What are the vital parts of a cell?Cell membrane, cytoplasm and nucleus. Endoplasmic reticulum(ER), cytoplasm,ribosomes, nucleolus, chromosomes, cell membrane, vacuole, golgi apparatus, lysosome, mitochondrion, centrioles, nucleus3.Give brief accounts of the structures and functions of the cell membrane, cytoplasm andnucleus.4.List the four types of tissues.Epithelial tissues, connective tissue, muscle tissue, nervous tissue5.Suppose you were a linguist and asked to explain the difference between RNA and DNA,how would you explain (from the point of view of word formation)?Suppose you were a molecule biologist and asked to explain the difference between RNA and DNA, howwould you explain?RNA stands for ribonucleic acid with oxygen, the DNA stands for deoxyribonucleic acid without oxygen.C.translate the following into Chinese1. Located along the endoplasmic reticulum as well as elsewhere in the cytoplasm are numerous ribosomes.细胞质的各处以及沿着胞浆网有数量很多的核糖体。
汽车专业英语课后题答案
CHARPTE ONE ENGINEUnit 11、回答问题(1)The purpose of using a liner is that, if the cylinder is damaged, the liner can be removed and replaced rather easily.(2) It mainly consists of piston, compression rings, oil control rings, oil control rings, piston pin and connecting rod.(3) It includes crankshaft, bearings, flywheel, harmonic balancer, timing gear, and front and rear seals.(4) The piston reciprocating motion changes to the crankshaft rotary motion by connecting rod.(5) It is used to transfer the camshaft lift to the valve assembly.(6) The rotary motion of the camshaft changes to reciprocating motion by lifters.2、英译汉（1）气门弹簧座圈（2）气门传动机构（3）排气歧管垫（4）气门杆（5）往复式发动机（6）压缩比（7）排气冲程（8）连杆轴承3、汉译英（1）crankshaft main bearing（2）cylinder head bolt （3）piston ring（4）connecting rod bearing （5）cylinder head gasket （6）connecting rod bolt （7） rocker arm shaft （8）hydraulic lifter4、翻译句子（1）这个问题通常与汽缸盖内破裂或者变形有关，缸体破裂可能还会引起燃烧室冷却，导致排放白色尾气。
计算机专业英语教程（第四版）习题答案
计算机专业英语教程（第四版）习题答案计算机专业英语教程(第四版)习题答案计算机专业英语（第四版）课后习题答案Unit 1 [Ex 1] Fb5E2RGbCAP [Ex 2] 1. input, storage, processing, and output 2. power; speed; 1. F 2. T 3. T 4. F 5. T 6. T 7. T 8. T 9. T 10.memoryp1EanqFDPw 3. central processing unit memoryDXDiTa9E3d 5. keyboard; [Ex 3] B. A. central processing unit; 1. F 2. D 2. monitor 3. G 4. C 5. B main memory; 6. A 7. E monitorRTCrpUDGiT 8. H5PCzVD7HxA 4. internal; primary;1. user3. data4. keyboard5. data processingjLBHrnAILg6. information [Ex 4] instructions7. computer8. memory 3. manipulates 4.1. input device2. screen, screen 5. retrievexHAQX74J0X 8. Function6. code7. hard copy[Ex. 5] 新处理器开始IT 技术的新时代New Processors Open New Era of IT Technologies Last week, Intel introduced to the public in Russia and other CIS countries a family of processors Intel Xeon E5-2600. They are more powerful and reliable and, importantly, are very economical in terms of energy consumption. Their1 / 30presence opens a new era in the field of IT technologies and means that the cloud technology is getting closer.LDAYtRyKfEThese processors are primarily designed for servers, data centers (DPC) and supercomputers. The emergence of this class of devices is not accidental. According to the regional director of Intel in Russia and other CIS states Dmitri Konash who spoke at the event, the market of IT-technology is developing so rapidly that, according to forecasts, by 2015 there will be 15 billion devices connected to the Internet, and over 3 billion of active users.Zzz6ZB2Ltk 上周，英特尔公司向俄罗斯和其它独联体国家的公众推出了英特尔Xeon E5-2600 系列处理器，它们更加强大可靠，尤其是在能量消耗方面更加经济实惠。
工业工程专业英语课后练习题含答案
工业工程专业英语课后练习题含答案1. What is Industrial Engineering?Industrial engineering is a field which seeks to optimize the use of resources (including people, machines, materials, and money) in the design and implementation of manufacturing and production systems. It is concerned with managing and improving the overall efficiency, productivity, and qualityof these systems, as well as ensuring the health and safetyof workers.2. What are the key areas that industrial engineers focus on?Industrial engineers focus on a number of areas, including: •Manufacturing and production systems design and improvement•Supply chn management•Quality control and process improvement•Ergonomics and workplace design•Project management•Safety and risk management3. What are some common industrial engineering tools and techniques?Some common industrial engineering tools and techniques include:•Lean manufacturing and Six Sigma methodologies for process improvement•Computer-ded design and manufacturing (CAD/CAM) for product and system design•Statistical analysis and modeling for data analysis and decision making•Simulation modeling for system analysis and optimization•Work measurement and time motion studies for process analysis and improvement•Human factors engineering for design of workspaces and equipment4. What are the benefits of industrial engineering?The benefits of industrial engineering include:•Increased productivity and efficiency ofmanufacturing and production systems•Reduced waste and costs in manufacturing and production processes•Improved quality control and product quality•Safer and more ergonomic workspaces for employees•Improved supply chn management and logistics•More effective project management and resource allocation5. What are the education and career requirements for industrial engineering?To become an industrial engineer, one typically needs a Bachelor’s or Master’s degree in industrial engineering or a related field. Some common coursework includes statistics, operations research, supply chn management, and manufacturing systems design. Industrial engineers can work in a variety of industries, including manufacturing, healthcare, transportation, and government. They may work in roles such as process engineer, business analyst, quality engineer, or project manager.Answers to Practice Questions:1.What is the goal of industrial engineering?The goal of industrial engineering is to optimize the use of resources in the design and implementation of manufacturing and production systems in order to improve efficiency, productivity, and quality.2.What are some key areas that industrial engineersfocus on?Industrial engineers focus on areas such as manufacturing and production systems design and improvement, supply chn management, quality control and process improvement, ergonomics and workplace design, project management, andsafety and risk management.3.What are some common tools and techniques used byindustrial engineers?Common industrial engineering tools and techniques include lean manufacturing and Six Sigma methodologies, computer-ded design and manufacturing, statistical analysis and modeling, simulation modeling, work measurement and time motion studies, and human factors engineering.4.What are some benefits of industrial engineering?Benefits of industrial engineering include increased productivity and efficiency, reduced waste and costs,improved quality control and product quality, safer and more ergonomic workspaces, improved supply chn management and logistics, and more effective project management and resource allocation.5.What education and career requirements are therefor industrial engineering?To become an industrial engineer, one typically needs a degree in industrial engineering or a related field, and may work in roles such as process engineer, business analyst, quality engineer, or project manager.。
大学专业用途英语课后习题答案
大学专业用途英语课后习题答案1. You'd better ( ) a copy of the whole article for yourself. [单选题] *A. make(正确答案)B. makingC. to makeD. made2. He is very strict. It is no use ( ) yourself to him. [单选题] *A. explainedB. to explainC. explaining(正确答案)D. explain3. All people must pull together ( ) the project can be finished on schedule. [单选题] *A. as thoughB. ifC. even thoughD. in order that(正确答案)4. I wish I ( ) shopping with you yesterday, because I was very bored at home then. [单选题] *A. had gone(正确答案)B. would goC. could have goneD. went5. If ( ) in a warm place, these flowers will bloom in late May. [单选题] *A. to plantB. planted(正确答案)C. plantD. planting6. My father recommended two new books to me, ( ) seemed to be very interesting. [单选题] *A. both of thatB. all of thatC. both of which(正确答案)D. all of which7. Tom will never forget the days ( ) he lived in the remote village with his parents. [单选题] *A. whatB. whichC. when(正确答案)D. why8. Don't expect too much from her. The more you expect, ( ) you will become. [单选题] *A. the disappointedB. more disappointedC. the most disappointedD. the more disappointed(正确答案)9. The weather is quite fine. Let's go swimming, ( )？ [单选题] *A. will youB. shall we(正确答案)C. do weD. do you10. There is no doubt that the residents living in this building can have free ( ) to the swimming pool. [单选题] *A. excessB. access(正确答案)C. accelerateD. assess11. If you want to strengthen your friendship with your friends, you should ( ) more time communicating with them. [单选题] *A. spend(正确答案)B. takeC. payD. cost12. Tom has been nervous for three days, since he will have a(n) ( ) for the manager's job. [单选题] *A. reviewB. viewC. chatD. interview(正确答案)13. But for your advice, I ( ) the task arranged by the leader yesterday. [单选题] *A. shall not finishB. could not have finished(正确答案)C. shall finishD. could finish14. The aim of this meeting is ( ) how to solve the serious crisis. [单选题] *A. to discuss(正确答案)B. discussingC. to discussingD. discussed15. This building is named ( ) his name in memory of his great invention. [单选题] *A. upB. after(正确答案)C. atD. in16. ( ) are quite humorous and everyone likes making friends with them. [单选题] *A. The Bushes(正确答案)B. A BushC. BushesD. The Bush17. One way to manage time wisely is to give ( ) to what is the most important. [单选题] *A. principleB. permissionC. priority(正确答案)D. process18. The teachers don't know ( ), because the meeting rooms are being decorated. [单选题] *A. where should the meeting be heldB. which should the meeting be heldC. which the meeting should be heldD. where the meeting should be held(正确答案)19. Due to the outbreak of the epidemic, many outdoor activities have been ( ). [单选题] *A. called forB. called off(正确答案)C. called backD. called in20. According to the report, some experts ( ) the shop with selling cups with insulting ads. [单选题] *A. charge(正确答案)B. accuseC. blameD. condemn21. Some people ( ) it for granted that what they pick up in the street belongs to them. [单选题] *A. makeB. take(正确答案)C. getD. regard22. Because there is enough time, the teacher advises students ( ) their papers again. [单选题] *A. examinedB. to examine(正确答案)C. to examiningD. examine23. Many people suffer from hunger in this country ( ) the decrease of food imports this year. [单选题] *A. instead ofB. regardless ofC. due to(正确答案)D. as to24. I ( ) reading the novel by yesterday, so I buy a new novel today. [单选题] *A. had finished(正确答案)B. finishedC. finishD. would finish25. Most foreign people think ( ) very difficult to learn to write Chinese characters. [单选题] *A. thatB. thisC. it(正确答案)D. one26. Mary heard her name called by someone, whose voice was very familiar ( ) her. [单选题] *A. withB. to(正确答案)C. onD. in27. One ( ) of extra-curricular activities is that the kids involved can gain friendship. [单选题] *A. flexibilityB. benefit(正确答案)C. privilegeD. interest28. I will tell the truth to him if he ( ) the funeral the day after tomorrow. [单选题] *A. would attendB. will have attendedC. attends(正确答案)D. will attend29. His ( ) of the accident conflicted with that of the other witnesses. However, I believed what he said was true. [单选题] *A. expectationB. instructionC. responseD. account(正确答案)30. Every time I run into difficulty, he is always the first ( ) help. [单选题] *A. to be offeredB. to offer(正确答案)C. offerD. offering31. Many women have to resign in order to ( ) their children wholeheartedly. [单选题] *A. bring up(正确答案)B. put upC. break upD. build up32. My good friend Lily told me that she ( ) to New York the next month. [单选题] *A. wentB. goesC. would go(正确答案)D. will have gone33. It is natural that people ( ) feel upset for no reason. It usually won't last too long. [单选题] *A. sometimes(正确答案)B. some timesC. a timeD. some time34. Our company wants to invest in the property market, so we look forward to ( ) with that company. [单选题] *A. cooperateB. cooperating(正确答案)C. cooperatedD. being cooperated35. It is really ( ) to borrow money from your elder sister just to help a selfish stranger pay off his debt. [单选题] *A. ridiculous(正确答案)B. stubbornC. splendidD. popular36. The kids in the kindergarten help each other and never quarrel, thus creating a ( ) atmosphere. [单选题] *A. commonB. lonelyC. peaceful(正确答案)D. steady37. You ( ) to make so many preparations; the job has been assigned to an experienced fellow. [单选题] *A. needn't have bothered(正确答案)B. shouldn't have botheredC. mustn't have botheredD. couldn't have bothered38. ( ) in the park yesterday afternoon, my mother met an old friend. [单选题] *A. To walkB. Walking(正确答案)C. WalkD. Walked39. Mary behaved in a specially confident manner ( ) she had understood the problem completely. [单选题] *A. as if(正确答案)B. whetherC. althoughD. than40. As we all know, success results from hard work; ( ) efforts, nothing can be achieved. [单选题] *A. except forB. without(正确答案)C. despiteD. besides41. His advice is that your father ( ) more exercise outdoors in the morning. [单选题] *A. doneB. will doC. should do(正确答案)D. does42. From this book, you can know ( ) those animals escape from their natural enemies. [单选题] *A. whoB. how(正确答案)C. whereD. it43. Plants are very ( ) to climate change. Therefore, many tree species are faced with extinction because of global warming. [单选题] *A. sensibleB. consciousC. sensitive(正确答案)D. independent44. His two dogs made a mess in his room, ( ) he didn't want to punish them. [单选题] *A. andB. orC. becauseD. but(正确答案)45. Hearing the words, he didn't seem to be offended; ( ), he looked very happy. [单选题] *A. in a wordB. in other wordsC. on the wholeD. on the contrary(正确答案)46. ( ) the salary is rather low, many young people have resigned in recent months. [单选题] *A. Because(正确答案)B. ForC. AfterD. So that47. What the little girl wants ( ) a pen, and what her elder brother wants ( ) two books. [单选题] *A. are; areB. is; isC. is; are(正确答案)D. are; is48. Most universities don't ( ) that every student can graduate with a certificate if they don't study hard. [单选题] *A. guarantee(正确答案)B. provideC. requireD. complete49. The company has recently taken on fifty people ( ) live in the local area. [单选题] *A. whichB. whoseC. thoseD. who(正确答案)50. All the afternoon my colleagues and I ( ) a report in the meeting room. [单选题] *A. prepareB. were to prepareC. have been preparing(正确答案)D. had been preparing5I. It is no use worrying about the future all the time. No one knows what will ( ) next minute. [单选题] *A. take placeB. get onC. disappearD. happen(正确答案)52. Alice, please turn down the music. I ( ) an important phone call at present. [单选题] *A. answerB. answeredC. have answeredD. am answering(正确答案)53. After you use my dictionary and English book, you should place them ( ) they used to be. [单选题] *A. the momentB. where(正确答案)C. whenD. that54. ( ) runs the fastest in the competition will be given an expensive prize. [单选题] *A. Whoever(正确答案)B. WhomeverC. WhomD. Who55. If you want these new employees to work out the answer, two hours and a half ( ) not enough. [单选题] *A. to beB. beingC. areD. is(正确答案)56. Only after they had examined the machine for several hours ( ) the problem. [单选题] *A. they foundB. did they find(正确答案)C. they findD. do they find57. ( ), he doesn't know how to get on with other people. [单选题] *A. Adult as he is(正确答案)B. Adult he is asC. Adult he as isD. An adult as he is58. It was ( ) that they went for a picnic in the park last weekend. [单选题] *A. so nice a weatherB. such nice weather(正确答案)C. nice weather soD. too nice weather59. It is advisable to adjust the measures on the ( ) of short-time predictions. [单选题] *A. basis(正确答案)B. baseC. foundationD. ground60. ( ) slowly he runs! I don't think he may attend the lecture on time. [单选题] *A. WhatB. ItC. How(正确答案)D. Whether。
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1. Put the following into Chinese.（1）Ohm’s law states that the voltage across a resistor is directly proportional to the current flowing through the resistor. The constant of proportionality is the resistance value of the resistor in ohms.流过电路里电阻的电流，与加在电阻两端的电压成正比，与电阻的阻值成反比。
这就是欧姆定律。
（2）Many materials, however, closely approximate an ideal linear resistor over a desired operating region.不过，许多材料在规定的工作范围内非常接近理想线性电阻。
（3）It should be noted that an ideal voltage source (dependent or independent ) will produce any current required to ensure that the terminal voltage is as stated, whereas an ideal current source will produce the necessary voltage to ensure the stated current flow.应该注意：一个理想电压源（独立或受控）可向电路提供任意电流以保证其端电压为规定值，而电流源可向电路提供任意电压以保证其规定电流。
（4）A different class of relationship occurs because of the restriction that some specific type of network element places on the variables. Still another class of relationship is one between several variable of the same type which occurs as the result of the network configuration, i. e., the manner in which the various element of the network are interconnected.一种不同类型的关系是由于网络元件的某种特定类型的连接对变量的约束。
另一类关系由于网络结构，即网络的不同元件互相连接的方式所产生的相同形式的一些变量间的关系。
（5）The thermal conductivity of metals is as much as several hundred times that of glass.金属的导热率比玻璃高几百倍。
（6）Magnetic line of force will，whenever passible, travel through iron or other magnetic materials.磁力线只要有可能就会通过铁或其它磁性材料。
（7）Actually, 0 o C is indeed the lower limit to temperatures capable of being attained.事实上绝对零度确是所能达到的温度的最低限度。
2. Translate the following into English.（1）电路元件吸收或释放的功率为元件两端的电压与流过该元件电流的乘积。
The power absorbed or supplied by a circuit element is the product of the voltage across the element and the current through it.（2）理想独立电源是一个有源元件，它所提供的电压或电流不依赖于电路中其他变量。
An ideal independent source is an active element that provides a specified voltage or current that is completely independent of other circuit variables.（3）受控电源是一个有源元件，它所提供的电压或电流受电路中某部分电压或电流控制。
An ideal dependent (or controlled) source is an active element in which the source quantity is controlled by another voltage or current.（4）叠加定理为：线性电路中，任一电压或电流都是电路中各个独立电源单独作用时，在该处产生的电压或电流的叠加。
The superposition principle states that the voltage across (or current through) an element in a linear circuit is the algebraic sum of the voltages across (or current through) that element due to each independent source acting alone.（5）计算机可分为模拟计算机和数字计算机两种。
Computers may be classfied as analog and digital．（6）新型晶体管的开关时间缩短了三分之二。
The switching time of the new-type transistor is shortened three times．（7）超导体在电气应用上的重要性不能被估计过高。
The importance of superconductor in the uses of electricity cannot be overestimated.1.Put the following into Chinese.（1）A bipolar junction transistor (BJT) is a three-layer silicon (or germanium) device consisting of either two p- and one n-type layers of materials (pnp) or two n- and one p-type layers of materials (npn). 双极结型晶体管为三层的硅（或锗）器件，由两个P型和一个N型材料层（NPN）或者两个N型和一个P型材料层（PNP）组成。
（2）Since the emitter follower has a high input impedance and a low output impedance, its voltage gain is less than unity and the power gain is normally lower than that obtained from other configurations.由于射极跟随器的输入阻抗高且输出阻抗低，其电压增益小于1，功率增益通常也比其他结构小。
（3）The current in a reverse-biased diode is small (typically 10-8A for silicon) and approximately independent of voltage until the breakdown region at high reverse voltages is reached.反向偏置的二极管中电流很小（硅管的典型值为10-8安），在处于较高的反向电压的击穿区外基本上与电压无关。
（4）Most integrated circuits provide the same functionality as “discrete” semiconductor circuits at higher levels of reliability and at a fraction of the cost.许多集成电路具有和分立的半导体电路相同的功能，而且可靠性更高，成本更低。
（5）Something must be done to prevent the expanding outbreak of bird flu.必须采取措施防止禽流感大流行。
（6）The first round of the six-part talks had been colored by acrimony over North Korea's nuclear weapons.第一轮六方会谈弥漫着不协调的气氛：会上对朝核问题争论激烈。
（7）Two years’ working is a must to the people who want to take up graduated examination.对于要参加研究生考试的人来说，两年的工龄事是必备条件。
2.Translate the following into English.（1）模拟放大器根据设定的放大倍数对模拟电压或电流信号进行放大，以推动负载工作。
Analog amplifiers can amplify analog voltage or current signals to drive the load according to the preset amplification.（2）放大器的增益就是放大倍数，用于表示放大器对小信号的放大能力。
The gain of the amplifier is its amplification that is used to express its capability of amplifying small signals.（3）很多实际应用系统中的放大电路都通过级联多级放大器来提高放大倍数。
Many amplifying circuits in practical application systems chain together a series of amplifier stages to improve their amplification.（4）模拟电路用于处理在0伏到电源电压之间任意变化的信号。