《计算机英语(第4版)》课后练习参考答案课后习题答案.pdf

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1、 计算机英语（第4版）练习参考答案Unit One:Computer and Computer ScienceUnit One/Section AL Fill in the blanks with the information given in the text:1.Charles Babbage;Augusta Ada Byron2.input;output3.VLSI4.workstations;mainframes5.vacuum;transistors6.instructions;software7.digit;eight;byte8.microminiaturization;chi

2、pII.Translate the following terms or phrases from English into Chinese and vice versa:1.artificial intelligence 人工智能2.paper-tape reader 纸带阅读器3.optical computer 光计算机4.neural network 神经网络5.instruction set 指令集6.parallel processing 并行处理7.difference engine 差分机8.versatile logical element 通用逻辑元件9.silicon s

3、ubstrate 硅衬底10.vacuum tube 真空管11.数据的存储与处理 the storage and handling of data1 2.超大规模集成电路 very large-scale integrated circuit1 3.中央处理器 central processing unit1 4.个人计算机 personal computer15.模拟计算机 analogue computer16.数字计算机 digital computer17.通用计算机 general-purpose computer18.处理器芯片 processor chip19.操作指令 ope

4、rating instructions20.输入设备 input deviceIII.Fill in each of the blanks with one of the words given in the following list,makingchanges if necessary:We can define a computer as a device that accepts input,processes data,stores data,andproduces output.According to the mode of processing,computers are e

5、ither analog or digital.They can also be classified as mainframes,minicomiHiters、workstations,or microcomputers.All else（for example,the age of the machine）being equal,this caiegorizalion provides someindication of the computers speed,size,cost,and abilities.Ever since the advent of computers,there

6、have been constant changes.First-generationcomputers of historic significcmce,such as UNIVAC（通用自动计算机），introduced in theearly 1950s,were based on vacuum tubes.Second-generation computers,appearing in theearly 1960s,were those in which transistors replaced vacuum tubes.In third-generationcomputers,dat

7、ing from the 1960s,integrated circuits replaced transistors.In fourth-generationcomputers such as microconwuters、which first appeared in the mid-1970s,large-scaleintegration enabled thousands of circuits to be incorporated on one chip.Fifth-generationcomputers are expected to combine very-large-scal

8、e integration with sophisticated approachesto computing、including artificial intelligence and true distributed processing.IV.Translate the following passage from English into Chinese:计算机将变得更加先进，也将变得更加容易使用。语音识别的改进将使计算机的操作更加容易。虚拟现实，即使用所有人类官能与计算机进行交互的技术，也将有助于创建更好的人机接口。人们正在开发其他的奇异计算模型，包括使用生物机体的生物计算、使用具有

9、特定属性的分子的分子计算，以及使用遗传基本单位DNA（脱氧核糖核酸）存储数据和执行运算的计算。这些都是可能的未来计算平台的例子，而它们迄今还能力有限或完全属于理论范畴。科学家们研究它们，是因为嵌入硅中的电路的微小型化受到物理限制。还有一些限制与即使最微小的晶体管也会产生的热量有关。Unit One/Section BI.Fill in the blanks with the information given in the text:1.experimentation2.interfacing3.interdisciplinary4.microprocessorIL Translate the

10、 following terms or phrases from English into Chinese and vice versa:1.artificial neural network 人工神经网络puter architecture 计算机体系结构3.robust computer program 健壮的计算机程序4.human-computer interface 人机接 口5.knowledge representation 知识表示6.数值分析 numerical analysis7.程序设计环境 programming environment8.数据结构 data struc

11、ture9.存储和检索信息 store and retrieve information1 0.虚 拟现实 virtual realityUnit One/Section CI.Fill in the blanks with the information given in the text:1.output2.supercomputer3.microcontroller4.handheld;convergenceIL Translate the following terms or phrases from English into Chinese and vice versa:1.Web

12、page（万维）网页2.touch sc re e n 触摸屏，触屏3.blade se rv e r刀片服务器4.removable storage device 移 动（式）存储设备5.声卡 sound card6.存 储 服 务 器 storage server7.便携式媒体播放器portable media player8.硬盘 hard diskUnit Two:Computer ArchitectureUnit Two/Section AI.Fill in the blanks with the information given in the text:1.input;outpu

13、t;storage2.Basic Input/Output System3.flatbed;hand-held4.LCD-based5.dot-matrix;inkjet6.disk;memory7.volatile8.serial;parallelIL Translate the following terms or phrases from English into Chinese and vice versa:1.function k e y 功能键，操作键，函数键2.voice recognition module 语音识别模块3.touch-sensitive region 触敏区4

14、.address b u s 地址总线5.flatbed scanner 平板扫描仪6.dot-matrix p rin te r点阵打印机（针式打印机）7.parallel connection 并行连接8.cathode ray tube 阴极射线管9.video game 电子游戏10.audio signal 音频信号11.操作系统 operating system12.液晶显示（器）LCD（liquid crystal display）13.喷墨打印机 inkjet printer14.数据总线 data bus15.串行连接 serial connection16.易失性存储器 v

15、olatile memory17.激 光 打 印 机 laser printer18.磁 盘 驱 动 器 disk drive19.基本输入/输出系统 BIOS（Basic Input/Output System）20.视 频 显 示 器 video displayIII.Fill in each of the blanks with one of the words given in the following list,makingchanges if necessary:CD-ROM stands for compact disc read-only memory.Unlike flop

16、py and hard disks,which use magnetic charges to represent Is and Os,optical discs use reflected light.On aCD-ROM disc,Is and Os are represented by flat areas and bumpy（高低不平的）areas（called“pits）on its bottom surface.The CD-ROM disc is read by a laser that projects a tiny beam oflight on these areas.Th

17、e amount of reflected light determines whether the area represents a 1or a 0.Like a commercial CD found in music stores,a CD-ROM is a read-only disc.Read-only means it cannot be written on or erased by the user.Thus,you as a user haveaccess only to the data imprinted（压印）by the publisher.A single CD-

18、ROM disc can store 650 megaOy/es（兆字节）of data.That is equivalent to451 floppy disks.With that much information on a single disc,the time to reirieve or accessthe information is very important.An important characteristic of CD-ROM drives is theiraccess rate.IV.Translate the following passage from Engl

19、ish into Chinese:调制解调器是在模拟与数字信号之间进行转换的设备。计算机使用的是数字信号，这种信号由离散单元组成，通常用一系列1和 0 表示。模拟信号是连续变化的；声波就是模拟信号的一个例子。调制解调器经常用于实现计算机之间通过电话线的互相通信。调制解调器将发送端计算机的数字信号转换成可通过电话线传输的模拟信号。信号到达目的地后，另外一个调制解调器重构原来的数字信号，供接收端计算机处理。如果两个调制解调器可同时互相发送数据，那么它们采用的就是全双工工作方式；如果一次只有一个调制解调器可以发送数据，那么它们采用的则是半双工工作方式。Unit Two/Section BL Fill

20、 in the blanks with the information given in the text:1.graphical2.file;scheduler3.virtual4.sliceII.Translate the following terms or phrases from English into Chinese and vice versa:1.interrupt h an d ler匚|断处理程序2.virtual m em ory虚拟存储（器），虚存，虚拟内存3.context sw itc h 上下文转换，语境转换4.main memory 主 存（储器）5.bit

21、pattern 位模式6.外围设备 peripheral device7.进程表 process table8.时间片 time slice9.图形用户界面 graphical user interface1 0.海 量 存 储 器 mass storageUnit Two/Section CI.Fill in the blanks with the information given in the text:1.repository2.central;sub-work4.layered 或 abstract machineIL Translate the following terms or

22、 phrases from English into Chinese and vice versa:1.code generator代码生成程序，代码发生器2.abstract machine 抽象机3.program e d ito r程序编辑程序，程序编辑器4.configuration item 配置项5.计算机辅助设计 CAD(computer-aided design)6.数据冗余 data redundancy7.指挥与控制系统 command and control system8.视频压缩与解压缩 video compression and decompressionUnit

23、Three:Computer Language and ProgrammingUnit Three/Section AI.Fill in the blanks with the information given in the text:1.artificial;instructions2.low-level;high-level3.machine4.machine5.functional;logic6.statement7.module8.digitalIL Translate the following terms or phrases from English into Chinese

24、and vice versa:1.storage register 存储寄存器2.function statement 函数语句3.program statement 程序语句4.object-oriented language 面向对象语言5.assembly language 汇编语言6.intermediate language中间语言，中级语言7.relational language 关 系（型）语言8.artificial language 人工语言9.data declaration 数据声明10.Structured Query Language 结构化查询语言11.可执行程序

25、 executable program12.13.14.15.16.程序模块条件语句赋值语句逻辑语言机器语言program moduleconditional statementassignment statementlogic languagemachine language1 7.函数式语言 functional language18.程序设计语言 programming language19.运行计算机程序 run a computer program2 0.计算机程序员 computer programmerIII.Fill in each of the blanks with one

26、 of the words given in the following list,makingchanges if necessary:A programming language is a language used to write instructions for the computer.It letsthe programmer express data Drocessing in a symbolic manner without regard tomachine-specific details.The difficulty of writing programs in the

27、 machine language of Os and Is led first to thedevelopment of assembly language,which allows programmers to use mnemonics（助t己符）for instructions and symbols for variables.Such programs are then translated by a programknown as an assembler（汇编程序，汇编器）into the binary encoding used by the computer.Other p

28、ieces of system software known as linking loaders（连接装入程序）combine pieces ofassembled code and load them into the machines main Memory unit,where they are thenready for execution.The concept of linking pieces of code was important,since itallowed“libraries”of Drograms to be built up to carry out commo

29、n tasksa first step towardthe increasingly emphasized notion of software reuse.Assembly language was found to besufficiently inconve市eni that higher-level languages（closer to natural languages）wereinvented in the 1950s for easier,faster programming;along with them came the need forcompilers,programs

30、 that translate hiahlevel language programs into machine code.Asprogramming languages became more powerfid and abstract,building efficient compilers thatcreate high-quality code in terms of execidicm speed and storage consumption became aninteresting computer science problem in itself.IV.Translate t

31、he following passage from English into Chinese:面向对象程序设计语言，如 C+和 Ja v a,基于传统的高级语言，但它们使程序设计员能够从合作对象集而非命令列表的角度进行思考。诸如圆之类的对象具有像圆的半径一类的属性，以及在计算机屏幕上绘制该对象的命令。一个对象类可以从其他的对象类继承特征。例如，定义正方形的类可以从定义长方形的类那里继承直角等特征。这一套程序设计类简化了程序设计员的工作，带来了更多“可复用的”计算机代码。可复用代码使程序设计员可以使用已经设计、编写和测试的代码。这使得程序设计员的工作变得比较容易，并带来更加可靠和高效的程序。Un

32、it Three/Section BI.Fill in the blanks with the information given in the text:1.objects2.platform-independent3.multithreading4.runtimeII.Translate the following terms or phrases from English into Chinese and vice versa:1.native code 本 机（代）码2.header f i l e 头标文件；页眉文件3.multithreaded program 多线程程序4.Jav

33、a-enabled browser 支持 Java 的浏览器5.malicious code 恶意代码6.机器码 machine code7,汇编码 assembly code8.特洛伊木马程序 Trojan horse9.软件包 software package10.类层次 class hierarchyUnit Three/Section CI.Fill in the blanks with the information given in the text:1.subscript;index2.fixed3.histogram4.two-dimensionalIL Translate t

34、he following terms or phrases from English into Chinese and vice versa:2345678bar c h a rt条形图frequency array 频率数组graphical representation 图形表示multidimensional array 多维数组用 户 视 图 user，s)view下标形式 subscript form 隹 数 名 且 one-dimensional array编程结构 programming constructUnit Four:Software DevelopmentUnit Fo

35、ur/Section AL Fill in the blanks with the information given in the text:1.application;piler4.interpreter5.debugger6.loop7.driver8.John von NeumannIL Translate the following terms or phrases from English into Chinese and vice versa:1.inference engine 推理机2.system c a l l 系统调用piled language编译执行的语言4.par

36、allel computing 并行计算5.pattern matching 模式匹配6.memory location 存储单元7.interpreter program 解释程序8.library ro u tin e库程序，程序库例行程序9.intermediate program 中间程序，过渡程序10.source file 源文件1 1.解释执行的语言 interpreted language1 2.设 备 驱 动 程 序 device driver1 3.源程序 source program1 4.调试程序 debugging program1 5.目标代码 object cod

37、e1 6.应用程序 application program1 7.实用程序 utility program1 8.逻辑程序 logic program1 9.墨盒 ink cartridge20.程序的存储与执行 program storage and executionIII.Fill in each of the blanks with one of the words given in the following list,makingchanges if necessary:A compiler,in computer science,is a computer program tha

38、t translates source code intoobject code.Software engineers write source code using high-level programming lan父ua父esthat people can understand.Computers cannot directly execute source code,but need acompiler to translate these instructions into a/ow-/eoe/language called machine code.Compilers collec

39、t and reorganize(compile)all the instructions in a given set of sourcecode to produce object code.Object code is often the same as or similar to a computersmachine code.If the object code is the same as the machine language,the computer can runthe program immediately after the compiler produces its

40、translation.If the object code is notin machine language,other programssuch as assemblers、binders（联编程序），linkers,and/oaders（加载程序）finish the translation.Most computer languages use different versions of compilers for different types ofcomputers or operating systems,so one language may have different c

41、ompilers for personalcomputers（PC）and Apple Macintosh computers.Many different manufacturers often produceversions of the same programming language,so compilers for a language may vary betweenmanufacturers.IV.Translate the following passage from English into Chinese:在软件中，错误是指导致程序发生故障或产生不正确结果的编码或逻辑错误

42、。较轻微的错误，如光标表现异常，会造成不便或带来挫折，但不会对信息产生破坏性影响。较严重的错误会导致程序“中止”（对命令停止反应），可能使用户别无选择，只能重新启动程序，结果致使任何前面已经做好但尚未保存的工作丢失。两种情况无论是哪一种，程序员都必须凭借称为调试的过程，发现并改正错误。由于错误对重要数据的潜在危险，商用应用程序在发行前要经过尽可能全面的测试与调试。程序发行后发现的较轻微错误在下一次更新时改正；较严重的错误有时可用称为补丁的特殊软件加以修补，以规避问题或减轻其影响。Unit Four/Section BI.Fill in the blanks with the informati

43、on given in the text:1.entity2.duration3.data;process 或 process;data4.implementedII.Translate the following terms or phrases from English into Chinese and vice versa:1.check b o x 复选框，选择框，校验框2.structured design 结构化设计3.building b lo c k 积木块，构建模块，构件4.database schema 数据库模式5.radio button 单 选(按)钮6.系统建模技术

44、 system modeling technique7.模型驱动开发 model-driven development8.数据流程图 data flow diagram9.下拉式菜单 drop-down pull-down)menu1 0.滚动条 scroll barUnit Four/Section CL Fill in the blanks with the information given in the text:1.heterogeneous2.asynchronous3.bridges4.opennessIL Translate the following terms or phr

45、ases from English into Chinese and vice versa:1.procedure call 过程调用2.fault tolerance 容错3.homogeneous system 同构系统4.autonomous agent 自主主体5.路山算法 routing algorithm6.异构型环境 heterogeneous environment7.多址通信协议 multicast protocol8.通信链路 communication(s)linkUnit Five:Software ProcessUnit Five/Section AFill in t

46、he blanks with the information given in the text:1.off-the-shelf2.exclusive3.cascade4.requirements;integration5.throwaway6.immediate;stable7.reuse-oriented;framework8.software;compromisesII.Translate the following terms or phrases from English into Chinese and vice versa:1.system specification 系统规格说

47、明2.unit te stin g 单 位（或单元、部件）测试3.software life c y c le 软件生命周期（或生存周期）4.system validation testing 系统验证测试5.evolutionary development process 演化开发过程6.linear model 线性模型7.program unit 程序单元8.throwaway prototype 抛弃式原型9.text form atting正文格式编排，文本格式化10.system evolution 系统演变11.系统设计范例 system design paradigm12.需求

48、分析与定义 requirements analysis and definition1 3.探索式编程方法 exploratory programming approach1 4.系统文件编制 system documentation1 5.瀑布模型 waterfall model1 6.系统集成 system integration1 7.商用现成软件 commercial off-the-shelf（或 COTS）software1 8.基于组件的软件工程 component-based software engineering（CBSE）19.软件维护工具 software mainte

49、nance tool2 0.软件复用 software reuseIII.Fill in each of the blanks with one of the words given in the following list,makingchanges if necessary:There are three different types of software maintenance.Firstly,there is maintenance torepair software faults.Coding errors are usually relatively cheap to cor

50、rect;design errors aremore expensive as they may involve rewriting several program components.Requirementserrors are the most expensive to repair because of the extensive system redesign that may beeceswy.Secondly,there is maintenance to adapt the software to a differeni operatingenvironment.This ty