专业英语课后习题答案
应用化学专业英语课后练习题含答案
5.A heterogeneous mixture is one in which the components are evenly distributed throughout.
Answer: False.
Short answer
4.What is the difference between an acid and a base?
Answer: An enzyme is a protein that acts as a catalyst in a biological reaction, lowering the activation energy required for the reaction to occur.
6.What is a heterogeneous mixture?
4.What is the definition of a chemical reaction?
Answer: A chemical reaction is a process in which one or more substances are transformed into different substances through the breaking and forming of chemical bonds.
Chapter 2
True or False
3.The pH scale is a measure of the concentration of hydrogen ions in a solution.
Answer: True.
4.A catalyst is a substance that changes the rate of a chemical reaction without being consumed in the reaction itself.
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。
工程造价专业英语课后习题答案
工程造价专业英语课后习题答案一、句子翻译1.in its specifics ,each structure is tailed to suit its environment ,arranged to perform its own particular function ,and designed to reflect personal tastes and preferences . 具体来说，每一个建筑物都要适应它周围的环境，发挥它特有的功能，反映设计者的品味和喜好。
2.To some degree ,each construction project is unique ,and no two jobs are ever quite alike .从某种程度上来说，每一个建筑项目都是独一无二的，并且没有两个相同的项目。
3.It is unlikely ,that field construction will ever be able to adapt itself completely to the standardized methods and product uniformity of assembly-line production .建筑不可能完全适应标准化的方法和装配线生产的产品。
4.The objective of this approach is to treat project planning ,design ,and construction as integrated tasks within a construction system.该团队的目标是使工程规划、设计、建设成为工程项目系统之内的整合性的工作。
5.Adherence to construction schedules and budget constraints is the CM’s prime responsibility .确保在进度和成本约束下完成工程是项目经理的主要责任。
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。
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.。
护理专业英语课后答案习题（2）
护理专业英语课后答案习题(2)护理专业英语课后答案Unit 4Warm-up TasksTask 1: True or False Statements1. 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 autonomyStudy & 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 TasksTask 1: True or False Statements1. F2. T3. F4. T5. T6. F7. T Task 2: Sentence Completion 1. one and half million2. medicines are used safely3. patients, drug makers4. dosing device attached to the bottle5. medication errorsStudy & PracticeI. Reading Comprehension Questions1. B2. A3. C4. C5. D II. Words to Practice1. complaint2. hemorrhagic3. respiratory4. anesthesiologist5. sequence6. stimulate7. perspired8. assessment9. eliminate 10. In accordance with III. TranslationA. Translate the following sentences into Chinese.1. 要对身体的某个病变部位进行有计划地更换，外科手术是唯一的方法。
专业英语课后答案(完整)
Computing Essentials 2008练习答案Chapter 1: Information Technology, The Internet, and YouCrossword Puzzle Answers:AcrossNum. Clue Answer1 The most essential part of an information system. People7 Coordinates computer resources. Operating System10 Modifies signals for processing. Modem12 Data that has been processed by the computer. Information13 Unprocessed facts. Data14 Notebook computer that accepts handwritten input.. Tablet PCDownNum. Clue Answer2 Uses computers to become more productive.End User3 Rules or guidelines to follow when using software, hardware, and data. Procedures4 Created by word processors.Document Files5 Specialized programs that allow input and output devices to communicate. Device Drivers6 Created by database management programs.Database Files8 The physical equipment of a microcomputer.Hardware9 The world’s largest computer network.Internet13 Provides step-by-step instructions to the computer.SoftwareMultiple Choice AnswersB B A B D D ACD DMatching AnswersE F I H A C G B D JChapter 2: The Internet, The Web, and Electronic CommerceCrossword Puzzle Answers:AcrossNum. Clue Answer2 Provide users a connection to the Internet. ISP3 Unwelcome e-mail. Spam5 Explore the Web. Surf7 Internet uploading and downloading service. FTP8 Steals credit card information. Carder9 A file, such as a document or worksheet, that is attached to an e-mail message.Attachment10 Involves the sale of a product to another business. B2B13 Connection to Web resources. L ink15 Process of transferring information from a remote computer to the computer one is using.DownloadDownNum. Clue Answer1 The sites that a search engine returns after running a keyword search. Hits4 Special program written in Java. Applet5 Locates information online. Search Engine6 Location of Web resource. URL11 Program that provides access to Web Browser12 Used to block certain sites. Filter14 Provides high-speed connection using existing telephone lines. DSLNum Multiple Choice AnswersD A C C A A A A D BMatching Answersi d g e f c h j a bChapter 3: Basic Application SoftwareCrossword Puzzle Answers:AcrossNum. Clue Answer4 Rectangular area that contains messages. Window5 System to organize and retrieve data. DBMS8 Collection of individual applications. Software Suite10 Rearrange records using a field. Sort11 Formed by intersection of row and column. Cell14 Collection of related data. Database16 Flyer, report, newsletter, Web page. Document17 These make up a presentation. Slides18 Question or request for data in a database. QueryDownNum. Clue Answer1 List of commands. Menu2 Rectangular grid of rows and columns used in programs like Excel. Worksheet3 Has records and fields. Table6 Controls format and placement of slides. Master Slide7 Requests user input. Dialog Box9 Moves insertion point to next line. Word Wrap12 Series of cells. Range13 A vertical block of cells one cell wide. Column15 Contain buttons and menus. ToolbarsNum Multiple Choice AnswersD D B D D A B B C DMatching Answersj a c h b d i e g fChapter 5: System SoftwareCrossword Puzzle Answers:AcrossNum. Clue Answer5 Program that makes copies of files in case of damage or loss. Backup6 Boot that occurs when the computer is already on. Warm boot8 Combination of several utility programs in one package. Utility Suite9 Allows communication between devices and the operating system. Driver11 Concentric rings on a disk. Tracks12 Used to control and coordinate networked computers. NOSDownNum. Clue Answer1 Location to store related files. F older2 Computer that coordinates all communication between other computers.Network server3 Uses graphical elements to communicate with the operating system. GUI4 Broken-up file stored in different sectors. Fragmented5 Starting or restarting a computer. Booting7 Operating system with over 80 percent of the market. Windows10 Graphic objects on the desktop used to represent programs and other files. IconsNum Multiple Choice AnswersC D C A A A C B B A CMatching Answersj d f b g h a e i cChapter 7: Input and OutputCrossword Puzzle Answers:AcrossNum. Clue Answer6 Used to grade multiple choice exams. OMR9 Specialized digital camera that broadcasts images over the Internet. WebCam10 Records images digitally on a disk. Digital camera13 Most popular input device used for computer games. Joystick14 Delivers much clearer picture than regular TV. HDTV16 Resolution is expressed as a matrix of these dots. Pixel17 Keyboard that rolls up for storage and transport. FlexibleDownNum. Clue Answer1 The distance between each pixel. Dot pitch2 Most commonly used way to input data. Keyboard3 Button rotated to scroll through information displayed on the monitor.Wheel Button4 Most widely used type of mouse. Mechanical5 Type of terminal that does no processing. Dumb7 Number of times a screen is redrawn each second. Refresh rate8 Measure of resolution. dpi11 Keys that turn features on and off. Toggle12 Translates processed information into hard copy. Printer15 Bar code system used in supermarkets. UPCNum Multiple Choice AnswersA B A B D A D C D BMatching Answersi e f j a b g d c hChapter 9: Communications and NetworksCrossword Puzzle Answers:AcrossNum. Clue Answer5 Interprets and routs incoming radio frequencies. Base station7 Continuous electronic waves. Analog9 Configuration of a network. topology10 Network interface card. NIC11 Transfer speed or transfer rate. bps12 Short range wireless communication standard. bluetooth14 Measurement of the width of the communication channel. bandwidthDownNum. Clue Answer1 Node that requests and uses resources available from other nodes. client2 Each device in the network handles its own communications. Bus network3 Device that allows links between LANs. Network gateway4 Process that converts digital to analog. modulation6 Pieces of a message sent over the Internet. packets8 Global positioning system. GPS13 Any device that is connected to a network. node15 Uses existing telephone lines to provide high-speed connections. DSL16 Central node for other nodes. hubNum Multiple Choice AnswersC B AD C D B B D DMatching Answersg b a i h e c j d fChapter 11: Information SystemsCrossword Puzzle Answers:AcrossNum. Clue Answer3 Level of management concerned with strategic planning. Top5 Identifies, investigates, and develops new products and services. Research9 Report produced upon request. Demand10 Someone who makes decisions in a DSS. User11 Model that helps middle-level managers in long-range planning. Tactical12 Information worker involved in the creation of information. Knowledge worker 14 Concerned with calculating employee paychecks. Payroll16 Specialized information system that knowledge workers use. KWS17 Keeps track of summaries of all foregoing transactions. General ledgerDownNum. Clue Answer1 The buying of materials and services. Purchasing2 Plans, prices, promotes, sells, and distributes goods and services. M arketing4 Form that shows supply and order information. Purchase order6 Report that calls attention to unusual events. Exception7 Help top-level managers oversee operations and develop plans. ESS8 Information worker that distributes information. Data worker13 Use data from TPS to support middle managers. MIS15 Level of management concerned with decision making. MiddleNum Multiple Choice AnswersB B A D D AC C CC BMatching Answersh j f d g b a c i eChapter 13: Systems Analysis and DesignCrossword Puzzle Answers:AcrossNum. Clue Answer3 Systems implementation Conversion8 Collection of activities and elements organized to accomplish a goal. System9 Build a model that can be modified before the system is installed. Prototyping10 Automated design tool. CASE12 Approach where new system is tried in only one part of an organization. Pilot14 Shows levels of management and formal lines of authority. Organization chart15 List of questions. ChecklistDownNum. Clue Answer1 1st step in the design phase. Feasibility2 St udy an organization’s systems.Systems analysis4 System’s performance is compared to the original specifications.System audit5 Approach where new system is implemented slowly over time. Phased6 Conversion done by abandoning old system and starting the new. Direct approach7 Diagram that shows the information flow within an organization. Data flow11 Shows the relationship between input and output documents. Grid chart12 Old and new systems are operated side by side. Parallel13 The most commonly overlooked activity in the implementation phase. TrainingNum Multiple Choice AnswersA D A C D D A D A CMatching Answersg h f d c a b i j eChapter 15: Your Future and Information TechnologyCrossword Puzzle Answers:AcrossNum. Clue Answer4 Inputs customer information and other data. Data entry worker6 Repairs and installs computer components and systems. Computer Technician8 Acting in anticipation of future problems, needs, or changes. Proactive9 Develops and maintains Web sites. W ebmaster10 Plans and designs information systems. System analyst11 Prepares instruction manuals and technical reports. Technical writer12 Designs, tests, and researches encryption procedures. CryptographerDownNum. Clue Answer1 Person that is unfamiliar with computers. Na?ve2 Creates, tests, and troubleshoots computer programs. Programmer3 Person that feels learning about computers is an imposition.F rustrated4 Creates and formats publication-ready material. Desktop publisher5 Instructs users on the latest software and hardware. Computer trainer7 Person that feels the idea of using a microcomputer is overrated. CynicNum Multiple Choice Answers D B A D C D C A D BMatching Answersd j h ae i b g c f。
环境专业英语课后习题答案
life expectancy ：耐用期限poverty-stricken ：贫穷的smog-laden air ：烟雾弥漫的天空global conditions ：全球状况haves and have-nots ：富人和穷人underprivileged ：社会地位低下的savanna ：热带大草原predator ：食肉动物，捕食者environmental disruptions ：环境破坏Waste reduction/waste/minimization: 减少废物/废弃物/最小化In-process: 工程内，进程内Housekeeping: 维持管理Equipment modification landfills: 设备改造，填埋Biodegradable solvents: 可生物降解溶剂Volatile chemicals: 挥发性化学品Management commitment: 管理层的承诺primary pollutant 一次大气污染物secondary pollutant 二次大气污染物air stagnation 空气流动停滞，大气停滞nitrous oxide 一氧化二氮nitric oxide 一氧化氮(NO)nitrogen dioxide 二氧化氮(NO2)soot煤烟dust 灰尘smog 烟雾ozone 臭氧herbicide 除草剂pesticide 杀虫剂/ 农药VOC 挥发性有机化合物APC 大气污染控制Regulatory program 调整项目Financial support 财政支持Operating cost 操作成本Biodegradation capacity 生物降解能力Environmental media 环境介质Biological 生物学的Technologies 技术、工艺Inorganic air pollutants 无机大气污染物treatment facilities 处理设备per capita per day 每人每天municipality 市政当局, 自治市population equivalent 人口当量basement flooding 地下室浸水runoff 排水domestic sewage 生活污水type of terrain 地形种类unpalatable 味道差的volatile chemicals 挥发性的化学药品scale in hot pipes 热水管积垢harbor pathogens 窝藏病原体precipitate 使沉淀turbid 混浊的intermittent sources 间歇的污染源fixtures 固定设备land disposal 掩埋处置fecal coliform 粪大肠菌群stringent effluent requirement 严格的废水排放要求assimilation capacity 同化能力practical outlets 可行的排出途径，现实出路aquatic life 水生生物detrimental to human health 对人体健康有害的endogenous phase 内源〔生长〕期flow monitoring 流量监测equipment age and reliability 装备老化及其可靠性mechanistic facilities 机械设备microbial activity 微生物活性activated sludge 活性污泥controlling respiration 控制呼吸oxidation ditches 氧化沟on-line automation 在线自动〔监测〕preempted and defaced land 过早地遭受破坏的土地personal conveniences 个人的便利生活条件lavish dependency 过量依赖solar collectors 太阳集热器undue sacrific 过度牺牲social attitudes 社会态度patterns of living 生活方式农药pesticide化肥chemical fertilizer 有机废物organic wastes 微生物microorganism / microbe 衰减attenuation 阻滞的retardant / blocking 稀释dilution 添加剂additive 合成塑料synthetic plastic 再生regeneration正常浓度normal concentration 严重污染的serious polluted / heavily polluted决定因素determining factor光化学氧化物photochemical oxidant液体微滴liquid droplet放射性物质radioactive substance不完全氧化incomplete oxidization / incomplete combustion含硫的sulfur-containing风化wind erosion / weathering汽车尾气automobile exhaust温室效应effect of greenhouse由二氧化碳引起的caused by CO2世界碳预算world carbon budget天气的自然波动natural fluctuations in climate全球变暖global warming厌氧的anaerobic甲烷methane臭氧层ozonosphere 气候模型climatic models腐烂decay出口outlet多管高效旋风分离器multitube high-efficiency cyclone合成纤维synthetic fabric捕集效率collection efficiency机械洗涤mechanical scrubbing压力降pressure drop焚化炉incinerator气体离子gas ion捕集板collection surface碳黑carbon black尾气off-gas可应用性applicability工业规模full-scale土壤床soil bed生物过滤器biofilter固定资本fixed capital易生物降解的easily biodegraded合成有机化合物synthetic organic compound微生物性能microbiological properties普遍接受universal acceptance食品加工food processing精馏rectification蒸发和冷凝evaporation and condensation土壤腐蚀erosion of soil过滤作用percolating/ filtration副产品byproduct脱盐desalination手动控制operator control/ manual control最优化minimize the effects微处理器microprocessor统计分析statistical analysis质量衡算mass balance动力学dynamics氧化还原oxidation and reduction /redox停留时间residence time模拟simulation参数parameter水解hydrolysis积分integral吸声材料sound adsorbing media弹性介质elastic media蒸汽打桩机steam-powered pile driver耳塞ear plug劳动部department of labor环保局Environmental Protection Agency （EPA）环保法environmental protection law(1) Raw materials that lose their usefulness because they sit on the shelf too long become waste.原材料放置过久会失去它们本身性能而变成废弃物。
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Lesson2Exercises1. 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.Exercises1.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 c ircuits 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。