专业英语课后习题答案

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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。

护理专业英语课后答案习题

护理专业英语课后答案习题每次做完英语习题，很多人第一时间都会检查一遍然后拿出习题答案来检查自己的答题情况，下面是学习啦小编整理的护理专业英语课后答案，以供大家学习参考。

护理专业英语课后答案Uni t1W ar m-up Tas k sT as k1:Tr ue or Fal s e St at em ent s1. T2. T3. F4. F5. T6. F7. F Tas k 2: Sent enc eC o m pl e t i on 1.pr i m ar y c ar e s pec i al i s t s2. c hoos i ng t o b ec om e s pec i al i s t s3. a l l ev i at e t h ose pr ob l em s4.r em ai n a t eam ef f or t5.f ewer and f ewer new doc t or sSt udy P r ac t i c eI.Readi ng Com pr ehens i on Q ues t i ons1. B2. D3. B4. D5. A I I. Wor ds t o P r ac t i c e1.uni que 6.s t er i l e2.uni t ar y7.es t abl i s hed3.adapt i v e8.v ar y4.ex pands9.di st i nc t f r om5.pr es c r i be10. su per v i se I I I.Tr ans l at i onA.Tr ans l at e t he f ol l ow i ng s ent ences i nt oC h i nes e.1.高级临床专科护士是接受了高等教育和培训的注册护士，大部分都有护理硕士或博士学位。

她们在不同的场所工作，包括医院、疗养院、企业、私人诊所、学校以及社区中心。

护理专业英语课后答案习题.doc

护理专业英语课后答案习题(2)1. T2. F3. T4. T5. F6. F7. F Task 2: Sentence Completion 1. visit patients in their homes 2. take care of their own illness 3. type 1 diabetes4. her public health certificate5. the day-to-day autonomy?Study PracticeI. Reading Comprehension1. B2. D3. C4. A5. B II. Words to Practice1. ambulation2. discharge3. abuse4. caregivers5. Counseling6. supervision7. tuberculosis8. disabled9. communicable 10. regimen III. TranslationA. Translate the following sentences into Chinese.1. 以往社区护士享受着在标准白天上班时间值班，大多从周一工作到周五。

然而，随着社区提供24小时服务趋向的出现，许多社区护士与其他医疗机构护士一样，需要倒班和在周末工作。

2. 一级预防是指预防疾病、外伤和残疾发生的措施。

此级别的预防针对的是对疾病易感，但还没有出现可识别的病理变化的个体和群体。

一级预防包含的措施很广，如健康促进、环境保护和特殊保护等。

B. Translate the following sentences into English.1. Community nurses should collaborate with colleagues and other health care professionals for the provision of client-centered care.2. Home care is defined as the provision of health services by formal and informal caregivers in the home.3. Professional autonomy is one of the essential features of nursing as a profession. Nurses have autonomy and independence in decision making and practice.4. The nursing shortage is well-documented, and it has become so severe thatexperts use the term nursing shortage and nursing crisis interchangeably.5. Primary health care should be accessible, affordable, and acceptable to all individuals who require them, especially to those vulnerable groups. IV. Audio TasksTask 1: Short-answer Questions 1. The first line of defense.2. The infection with Human immunodeficiency Virus.3. The body s immune system becomes compromised.4. After T cell counts reach a dangerous low level.5. By blood tests. Task 2: Spot Dictation1. infectious2. destroying3. Syndrome4. attaches5. production6. compromised7. susceptible8. Indicating护理专业英语课后答案Unit5Warm-up Tasks护理专业英语课后答案习题(3)1. lots of time and even some support2. the first six months of life3. before the baby is born4. 10 or 12 times5. aids in milk transferStudy PracticeI. Reading Comprehension1. B2. B3. C4. A5. D II. Words to Practice1. manifest 6. inferiority2. cognitive 7. apathetic3. Cohesion 8. Mutilation4. somatic 9. catheter5. rationalization 10. detachment III.TranslationA. Translate the following sentences into Chinese.1. 护士应提供启发式的合理解释来应对儿童不切实际的恐惧，并进行干预，从使恐惧造成的损伤降到最小(比如可在操作中鼓励父母陪伴，或尽可能让儿童自己作决定)。

专业英语课后习题答案

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。

英语专业综合英语教程-第六册-课后练习答案(全)

Key to the Exercises--- An Integrated English Course - Book 6Unit 1 Technology in Reverse●Text ComprehensionI. CII. 1. F. Not all technology makes things complicated and wasteful; it is only retarded technology that makes things complicated and wasteful. Refer to Paragraph 1.2. T. Refer to Paragraph 5.3. F. It is true that the author acknowledges the great changes brought about by new technology, buthe believes these advantageous changes are often offset by a lot of technology-related waste. Refer to Paragraph 7.4. T. Refer to Paragraph 7.5. F. The author expresses his doubt in a sarcastic tone that cellular phones could really improvemarriages and save “family values”. Refer to Paragraph 9.● Language WorkI. Explain the italicized part in each sentence in your own words.1. highly regarded, intricate, attractive2. a sudden increase3. an event that will make you feel upset for a long time4. can supposedly help, at the same time5. need to be able to use6. we receive so many press releases that we find it difficult to deal with them7. an age where hi-tech has brought us noticeably great changes8. supposed, get away from us/be unattainable9. consequence, people who know nothing about technology, impeding10. usually, insignificantII. Fill in the banks with the appropriate forms of the given words.1. customized2. traumatized3. promotional4. paradoxical5. frivolity6. subscribers7. successors8. inanities9. institutionalized10. subsidyIII. Fill in each of the blanks with a word or phrase taken from the box in its appropriate form.1. are clogged with2. purports to3. a vista of4. bombarded…with5. exulted over6. scribbled all over7. find… alluring8. make a comeback9. call up10. tossed … into11. was eliminated12. compress… intoIV. Explain the meaning of the underlined word or phrase in each sentence.1. weak2. entrance to3. full of4. be compensated for by having the same amount deducted from his tax5. shows all the signs of6. excitement and danger7. spent the afternoon discussing8. increase her confidence9. very often10. quick diveV. Correct the errors in the following passage.VI. Fill in each blank in the passage below with ONE appropriate word.1. millionaires2. computer3. breed4. programs5. companies6. generation7. popularity8. provide9. sales10. times11. valuable12. life● Translation1.The program offers long-term care for the mentally retarded.2.He’s got a cumbersome, bulky, old computer—it’s slow and complicated to use.3. He tried not to look conspicuous and moved slowly along the back of the room.4. It would cause a tremendous upheaval to install a different computer system.5. The gold medal continues to elude her.6. Yo u’d be a fool not to embrace an opportunity as good as that.7. Her salary will go up by a hefty 10%.8. I scrawled a quick note to Hilary and put it under her door.9. There’s a smashing view from her office.10 The trip out there was swell, but the hotel was a bit crummy.II. Translate the following passage into Chinese.在我成长的房子里有一间屋子，我们把它称作图书馆。

专业英语课后习题答案unit1-9完整+10-13非完整版

Unit 1Materials science材料科学Stone age石器时代Naked eye肉眼Bronze age铜器时代Optical property光学性能Integrated circuit集成电路Mechanical strength机械强度Thermal conductivity导热“Materials science” involves investigating the relationships that exist between the structures and properties of materials. In contrast ,”materials engineering “is ,on the basis of there structure property correlations ,designing or engineering the structure of a material that produce a predetermined set of properties。

，材料工程是根据材料的结构和性质的关系来设计或操纵材料的结构以求制造出一系列可预定的性质。

从功能方面来说，材料科学家的作用是发展或合成新的材料Virtually all important properties of solid materials may be grouped into six different categories: mechanical, electrical, thermal, magnetic, optical ,and deteriorative。

固体材料的所有重要的性质可以分成六个不同的种类，机械性能、电性能、热性能、磁性能、光性能和耗。

In addition to structure and properties , two other important components are involved in the sciences and engineering of materials , namely“processing”and“performance”.除了组织性能之外，另外两个重要的性质也包括在材料科学和工程之中，即“加工”和“特性”The more familiar an engineer or scientist is with the various characteristics and structure-property relationship，as well as processing techniques of material，the more proficient and confident he or she will be to make judicious materials choices based on these criteria。

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.。

材料专业英语课后习题答案

材料专业英语课后习题答案材料专业英语课后习题答案在学习材料专业英语的过程中，课后习题是非常重要的一部分，它能够帮助我们巩固所学的知识，并检验我们的理解和掌握程度。

下面是一些常见的材料专业英语课后习题及其答案，希望对大家的学习有所帮助。

一、单项选择题1. The ________ of a material refers to its ability to be drawn into a wire.A. malleabilityB. ductilityC. strengthD. hardness答案：B. ductility2. The ________ of a material refers to its ability to resist deformation under stress.A. malleabilityB. ductilityC. strengthD. hardness答案：C. strength3. The ________ of a material refers to its ability to resist scratching or indentation.A. malleabilityB. ductilityC. strengthD. hardness答案：D. hardness4. The process of changing a metal's properties by heating and cooling it is called ________.A. annealingB. temperingC. quenchingD. forging答案：A. annealing5. The process of heating a material to a high temperature and then cooling it quickly to make it hard is called ________.A. annealingB. temperingC. quenchingD. forging答案：C. quenching二、填空题1. The ________ of a material is its ability to return to its original shape after being deformed.答案：elasticity2. The ________ of a material is the maximum stress it can withstand before breaking.答案：tensile strength3. The ________ of a material is its ability to conduct electricity.答案：electrical conductivity4. The ________ of a material is its ability to conduct heat.答案：thermal conductivity5. The ________ of a material is its ability to absorb energy without breaking.答案：toughness三、阅读理解题材料科学与工程专业的学生需要学习并掌握英语，因为这门学科涉及到许多国际合作和交流。

护理专业英语课后答案习题

护理专业英语课后答案习题(4)护理专业英语课后答案习题护理专业英语课后答案Unit10Warm-up TasksTask 1: True or False Statements1. T2. F3. F4. F5. F6. T Task 2: Sentence Completion 1. can be helped2. a combination of medicine and therapy3. to manage their anxiety4. the sense of confidenceStudy & PracticeI. Reading Comprehension1. D2. B3. A4. C5. A II. Words to Practice1. concise 6. deviant2. defined as 7. impinge upon3. holistic 8. enact4. implementation 9. proceeded5. dilemma 10. formulated III. TranslationA. Translate the following sentences into Chinese.1. 20世纪30年代是一个过渡期。

护理工作开始考虑出现在所有疾病中的心理因素。

精神疾病的一些概念性的知识被合理地归为综合护理教育的一部分。

然而，直到1955年，精神护理才被要求编入所有本科护理教学大纲。

2. 精神科护士有极强的观察技能。

一些患者可能需要持续的观察，这也就意味着护士必须一直和患者在一起。

而另一些患者，如自杀患者，会需要近距离的观察。

患者的护理计划需定时进行监测和修改以反映患者需求的变化。

B. Translate the following sentences into English.1. With the spread of the virus the mood of horror is pervasive among all the villagers.2. In the early years of the twentieth century, some mentalfactors that could cause diseases were unrecognized.3. Doctors are often faced with such a dilemma that they don’t know whether they should tell the dying patients the truth or not.4. Some strange diseases with unknown reasons are on the rise since the tsunami happened in Southeast Asia.5. The Red Cross was first founded in 1863 in Geneva, Switzerland, and now has expanded into a worldwide organization. IV. Audio TasksTask 1: Short-answer Questions1. For almost one out of every five people.2. A failure of character.3. A combination of factors.4. Through billions of cells called neurons5. Proper amounts of chemical messengers to communicate. Task 2: Spot Dictation1. temporary2. struggling3. prevent4. recognizing5. imbalances6. messaging7. neurons8. neurotransmitters9. release 10. correctly护理专业英语课后答案Unit11Warm-up TasksTask 1: True or False Statements1. T2. T3. T4. F5. F6. T7. F Task 2: Sentence Completion1. seek medical attention immediately2. to take an aspirin right away3. do have a bypass surgery4. is given his stent or has bypass surgery5. elevated blood pressures, … stress, cholesterolStudy & PracticeI. Reading Comprehension Questions1. A2. C3. B4. D5. D II. Words to Practice1. tailored 6. blunts2. heart failure 7. see that3. onset 8. intimately4. impairment 9. provision5. restored…to 10. exacerbation III. TranslationA. Translate the following sentences into Chinese.1. 如果病人已了解康复的基本程序，并能够在无人帮助或在某一个人的帮助下从床挪动到椅子上，则该病人可以在家中进行康复。

电子信息工程专业英语教程课后练习题含答案

电子信息工程专业英语教程课后练习题含答案第一部分：综合练习阅读下面短文，完成题目Organic light-emitting diodes (OLEDs) are popular for use in displays because they can be made flexible, thin, and lighter in weight than traditional displays. OLEDs are also more environmentally friendly as they do not require a backlight, which increases their energy efficiency.1. What are the advantages of using OLEDs over traditional displays?Answer:The advantages of using OLEDs over traditional displays include that they can be made flexible, thin, and lighter in weight, and they are more environmentally friendly.2. Why are OLEDs more environmentally friendly than traditional displays?Answer:OLEDs are more environmentally friendly than traditional displays because they do not require a backlight, which increases their energy efficiency.完成下面句子，使其意思与原文相同1. The growth of social media platforms has led to an increase in cyberbullying.Answer:An increase in cyberbullying has been caused by the growth of social media platforms.2. The researchers found that there was a significant difference between the two groups.Answer:A significant difference between the two groups was found by the researchers.第二部分：专业术语练习选择最恰当的词汇，完成下面句子1. _______ is a circuit that can perform a single operation.A. DecoderB. EncoderC. Flip-flopD. GateAnswer:D. GateExplanation:A gate is a circuit that performs a single operation, such as AND, OR, or NOT.2. _______ refers to the process of converting an analog signal into digital form.A. SynthesisB. ModulationC. SamplingD. QuantizationAnswer:C. SamplingExplanation:Sampling refers to the process of converting an analog signal into digital form, where the value of the signal is sampled at regular intervals.根据定义给出对应术语1. The study of electronic devices and circuits.Answer:Electronics2. A device that supports the transfer of data between different networks.Answer:Gateway第三部分：阅读理解请阅读下面短文，并根据所提出的问题选择正确的答案。

数学专业英语第2章课后答案

2.12.比:ratio 比例:proportion 利率:interest rate 速率:speed 除:divide 除法:division 商:quotient 同类量:like quantity 项:term 线段:line segment 角:angle 长度:length 宽:width高度:height 维数:dimension 单位:unit 分数:fraction 百分数:percentage3.(1)一条线段和一个角的比没有意义,他们不是相同类型的量.(2)比较式通过说明一个量是另一个量的多少倍做出的,并且这两个量必须依据相同的单位.(5)为了解一个方程,我们必须移项,直到未知项独自处在方程的一边,这样就可以使它等于另一边的某量.4.(1)Measuring the length of a desk, is actually comparing the length of the desk to that of a ruler.(3)Ratio is different from the measurement, it has no units. The ratio of the length and the width of the same book does not vary when the measurement unit changes.(5)60 percent of students in a school are female students, which mean that 60 students out of every 100 students are female students.2.22.初等几何:elementary geometry 三角学:trigonometry 余弦定理:Law of cosines 勾股定理/毕达哥拉斯定理:Gou-Gu theorem/Pythagoras theorem 角:angle 锐角:acute angle 直角:right angle 同终边的角:conterminal angles 仰角:angle of elevation 俯角:angle of depression 全等:congruence 夹角:included angle 三角形:triangle 三角函数:trigonometric function直角边:leg 斜边:hypotenuse 对边:opposite side 临边:adjacent side 始边:initial side 解三角形:solve a triangle 互相依赖:mutually dependent 表示成:be denoted as 定义为:be defined as3.(1)Trigonometric function of the acute angle shows the mutually dependent relations between each sides and acute angle of the right triangle.(3)If two sides and the included angle of an oblique triangle areknown, then the unknown sides and angles can be found by using the law of cosines.(5)Knowing the length of two sides and the measure of the included angle can determine the shape and size of the triangle. In other words, the two triangles made by these data are congruent.4.(1)如果一个角的顶点在一个笛卡尔坐标系的原点并且它的始边沿着x轴正方向，这个角被称为处于标准位置.(3)仰角和俯角是以一条以水平线为参考位置来测量的,如果正被观测的物体在观测者的上方,那么由水平线和视线所形成的角叫做仰角.如果正被观测的物体在观测者的下方,那么由水平线和视线所形成的的角叫做俯角.(5)如果我们知道一个三角形的两条边的长度和对着其中一条边的角度,我们如何解这个三角形呢?这个问题有一点困难来回答,因为所给的信息可能确定两个三角形,一个三角形或者一个也确定不了.2.32.素数:prime 合数:composite 质因数:prime factor/prime divisor 公倍数:common multiple 正素因子: positive prime divisor 除法算式:division equation 最大公因数:greatest common divisor(G.C.D) 最小公倍数: lowest common multiple(L.C.M) 整除:divide by 整除性:divisibility 过程:process 证明:proof 分类:classification 剩余:remainder辗转相除法:Euclidean algorithm 有限集:finite set 无限的:infinitely 可数的countable 终止:terminate 与矛盾:contrary to3.(1)We need to study by which integers an integer is divisible, that is , what factor it has. Specially, it is sometime required that an integer is expressed as the product of its prime factors.(3)The number 1 is neither a prime nor a composite number;A composite number in addition to being divisible by 1 and itself, can also be divisible by some prime number.(5)The number of the primes bounded above by any given finite integer N can be found by using the method of the sieve Eratosthenes.4.(1)数论中一个重要的问题是哥德巴赫猜想,它是关于偶数作为两个奇素数和的表示.(3)一个数,形如2p-1的素数被称为梅森素数.求出5个这样的数.(5)任意给定的整数m和素数p,p的仅有的正因子是p和1,因此仅有的可能的p和m的正公因子是p和1.因此,我们有结论:如果p是一个素数,m是任意整数,那么p整除m,要么(p,m)=1.2.42.集:set 子集:subset 真子集:proper subset 全集:universe 补集:complement 抽象集:abstract set 并集:union 交集:intersection 元素:element/member 组成:comprise/constitute包含:contain 术语:terminology 概念:concept 上有界:bounded above 上界:upper bound 最小的上界:least upper bound 完备性公理:completeness axiom3.(1)Set theory has become one of the common theoretical foundation and the important tools in many branches of mathematics.(3)Set S itself is the improper subset of S; if set T is a subset of S but not S, then T is called a proper subset of S.(5)The subset T of set S can often be denoted by {x}, that is, T consists of those elements x for which P(x) holds.(7)This example makes the following question become clear, that is, why may two straight lines in the space neither intersect nor parallel.4.(1)设N是所有自然数的集合,如果S是所有偶数的集合,那么它在N中的补集是所有奇数的集合.(3)一个非空集合S称为由上界的,如果存在一个数c具有属性:x<=c对于所有S中的x.这样一个数字c被称为S的上界.(5)从任意两个对象x和y，我们可以形成序列（x，y），它被称为一个有序对，除非x=y，否则它当然不同于（y，x）.如果S和T是任意集合，我们用S*T表示所有有序对（x,y),其中x术语S，y属于T.在R.笛卡尔展示了如何通过实轴和它自己的笛卡尔积来描述平面的点之后，集合S*T被称为S和T的笛卡尔积.2.52.竖直线:vertical line 水平线:horizontal line 数对:pairs of numbers 有序对:ordered pairs 纵坐标:ordinate 横坐标:abscissas 一一对应:one-to-one 对应点:corresponding points圆锥曲线:conic sections 非空图形:non vacuous graph 直立圆锥:right circular cone 定值角:constant angle 母线:generating line 双曲线:hyperbola 抛物线:parabola 椭圆:ellipse退化的:degenerate 非退化的:nondegenerate任意的:arbitrarily 相容的:consistent 在几何上:geometrically 二次方程:quadratic equation 判别式:discriminant 行列式:determinant3.(1)In the planar rectangular coordinate system, one can set up aone-to-one correspondence between points and ordered pairs of numbers and also a one-to-one correspondence between conic sections and quadratic equation.(3)The symbol can be used to denote the set of ordered pairs（x，y）such that the ordinate is equal to the cube of the abscissa.（5）According to the values of the discriminate，the non-degenerate graph of Equation （iii） maybe known to be a parabola， a hyperbolaor an ellipse.4.（1）在例1，我们既用了图形，也用了代数的代入法解一个方程组（其中一个方程式二次的，另一个是线性的）。

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