《计算机英语(第4版)》课后练习答案

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计算机专业英语的第四版课后习题翻译讲课教案

中译英参考答案Unit 1A computer system consists of hardware system and software system. The hardware of the computer is usually divided into three major parts or three primary subsystems: the CPU, the memory subsystem, and the I/O subsystem.The CPU performs many operations and controls computer. The memory subsystem is used to store program being executed by the CPU, along with the program’s data. The I/O subsystem allows the CPU to interact with input and output devices such as the keyboard and monitor of a personal computer. The components of the computer are connected to the buses.The part of the computer that performs the bulk of data processing operations is called the central processing unit and is referred to as the CPU. In microcomputer, it is often called the microprocessor. The CPU is made up of three major parts: control unit, ALU, and register set.Memory is also known as internal memory or main memory. It refers to the circuits in the computer that hold whatever programs and data are available for immediate use by the CPU.I/O subsystem includes I/O devices and interface. There are a wide variety of I/O devices, such as mouse, printer, sensor, disk, and so on. Input-output interface provides a method for transferring information between internal storage and external I/O devices. Peripherals connected to a computer need special communication links for interfacing them with the CPU. The purpose of the communication link is to resolve the differences that exist between the central computer and each peripheral.Unit 2Storage hardware provides permanent storage of information and programs for retrieval by the computer. Hard disk drives store information in magnetic particles embedded in a disk. Usually a permanent part of the computer, hard disk drives can store large amounts of information and retrieve that information very quickly.Although fixed hard drive systems offer faster access and have a higher storage capacity than optical discs, optical disc systems use removable media –a distinct benefit. Optical discs –primary CDs and DVDs – are much more widely used than removable hard drive systems. They are the standard today for software delivery, as well as commonly used for storing high-capacity music and video files. There are also versions of both CD and DVD drives available for home audio and home theater use. Optical discs are commonly referred to as compact discs.CD and DVD discs are read by CD and DVD drives. The speed of a CD or DVD drive is rated as 24x, 32x, 36x, and so on. These labels describe how fast the drive is compared to the first version of that drive. For example, a 36x drive is 36 times the speed of the baseline unit that was originally manufactured. Most optical discs have a title and other text printed only on one side and they are inserted into the drive with the printed side facing up. When inserting such a CD or DVD, be careful not to get dirt, fingerprints, scratches, or anything else that might hinder light reflectivity on the disc’s surface.Unit 3(a) A program is a list of instructions or statements for directing the computer to perform arequired data processing task. Programming is a multistep process for creating that list of instructions.(b) It is important to understand the difference between a class and an object of that class. A class is simply a specification for creating objects. Thus, a single class may create multiple objects.(c) Java is an object-oriented, network-friendly high-lever programming language that allows programmers to build applications that can run on almost any operating system.(d) ActiveX is a set of controls, or reusable components that enables programs or content of almost any type to be embedded within a Web page. Whereas a Java must be downloaded each time you visit a Web site, with ActiveX the component is downloaded only once, then stored on your hard disk for later, repeated use.(e) Programming involves a great deal of creativity. The design is guide to the function or purpose of each component, but the programmer has great flexibility in implementing the design as code. No matter what language is used, each program component involves at least three major aspects: control structures, algorithms, and data structures.Unit 4The software system can be divided into two broad categories: application software and system software. Application software consists of the program for performing tasks particular to the machine’s utilization. In contrast to application software, system software comprises a large number of programs. These programs start up the computer and function as the principle coordinator of all hardware components and application software. Without system software loaded into RAM of your computer, your hardware and application software are useless.System software can be grouped into three basic parts: operating system, utility software, and language translators. The majority of an installation’s utility software consists of programs for performing activities that are fundamental to computer installations yet not included in the operating system. In a sense, utility software consists of software units that extend the capabilities of the operating system.A computer’s OS is the main collection of programs that manage its activities. The primary chores of an OS are management and control. The OS ensures that all actions requested by a user are valid and processed in an orderly fashion. It also manages the computer system’s resources to perform these operations with efficiency and consistency.Application software is the software designed to help you solve problems specific to business or perform specific business tasks. Application software then is the layer of software closest to you. Basically, there are four categories of application software: productivity software, business and specialty software, entertainment software and education/reference software.Unit 5A computer network is often classified as being either a local area network (LAN), a metropolitan area network (WAN), or a wide area network (WAN). The connection of two or more networks is called an internetwork. The worldwide Internet is a well-known example of an internetwork.LANs are privately owned networks within a single building or campus of up to a few kilometers in size. They are widely used to connect personal computers and workstations incompany offices and factories to share resources and exchange information.In general, a given LAN will use only one type of transmission medium. Various topologies are possible for LANs. The most common LAN topologies are bus, ring and star.A MAN is basically a bigger version of a LAN and normally uses similar technology. MAN is designed to extend over an entire city. It may be a single network such as a cable television network, or it may be a means of connecting a number of LANs into a large network so that resources may be shared LAN-to-LAN as well as device-to-device. For example, a company can use a MAN to connect the LANs in all of its offices throughout a city.A W AN spans a large geographical area that may comprise a country, a continent, or even the world. It provides long-distance transmission of data, voice, image, and video information over large geographical area.In contrast to LANs, W ANs may utilize public leased, or private communication devices, usually in combinations, and can therefore span an unlimited number of miles.Unit 6Transmission media are used to transfer messages over a network. For instance, the transmission media used in a network may be a privately owned set of cables, the public phone lines, or a satellite system. Transmission media can either be wired or wireless.The three types of wired media most commonly used to carry messages are twisted-pair wire, coaxial cable, and fiber-optic cable. One of the most successful developments in transmission media in recent years has been fiber optics. Fiber-optic cable is commonly used for the high-speed backbone lines of a network, or for Internet infrastructure.Wireless transmission media have become especially popular in recent years. They support communications in situations in which physical wiring is impractical or inconvenient, as well as facilitate mobility. Wireless media are commonly used to connect devices to a network, to share information between computers, to connect wireless mice to a computer, and for handheld PCs, wireless phones, and other mobile devices. Radio signals transferred through the air are the heart of most types of wireless media. In addition to conventional broadcast radio application, the microwave, cellular, and satellite transmission media also use radio signals to transmit data.Radio transmissions require the use of a transmitter to send the radio signals through the air.A receiver (usually containing some type of antenna) accepts the date at the other end. When a device functions as both a receiver and transmitter, it is commonly called a transceiver or transmitter-receiver.Unit 7(a) Since many database systems users are not computer trained, developers hide the complexity from users through several levels of abstraction, to simplify user’s interactions with the system: physical level, logical level, and view level.(b) A database schema is specified by a set of definitions expressed by a special language called a data-definition language (DDL). The result of compilation of DDL statements is a set of tables that is stored in a special file called data dictionary, or data directory.(c) The structured query language (SQL) is the most widely used and standard query language for relational database management systems. It is a kind of non-procedural language.(d) An entity is a “thing”or “object”in the real world that is distinguishable from otherobjects. For example, each person is an entity, and bank accounts can be considered to be entities. Entities are described in a database by a set of attributes.(e) Data warehouse is one of the newest and hottest buzzwords and concepts in the IT field and the business environment. A data warehouse is a logical collection of information——gathered from many different operational databases——that supports business analysis activities and decision-making tasks.Unit 8Animation is the term used to describe a series of graphical images that are displayed one after the other to simulate movement. Cartoons on television are one example of animation.Video differs from animation in that it usually begins as a continuous stream of visual information that is broken into separate images or frames when the video is recorded. When the frames are projected—typically at a rate of 30 frames per second—the effect is a smooth reconstruction of the original continuous stream of information. As you might imagine, at 30 frames per second, the amount of data involved in displaying a video during a multimedia presentation can require a substantial amount of storage space. Consequently, video data—like audio data—is often compressed. A variety of compression standards exist. Some of the most common video file formats are .avi, .mpeg, .mov, .rm.For multimedia presentation, video may be recorded using a standard (analog) video camera and then converted to digital form as it is input into a computer. Alternatively, the film can be recording digitally using a digital video camera. Streaming video is frequently used on Web pages to reduce file size. Similar to streaming audio, Streaming video files can begin playing once a portion of the video has been downloaded.Unit 9(a) AI is currently being applied in business in the form of knowledge systems, which use human knowledge to solve problems. The most popular type of knowledge-based system is the expert system. An expert system is a computer program that attempts to represent the knowledge of human experts in the form of heuristics. The term heuristic is derived from the same Greek root as the word eureka, which means “to discover”.(b) The user interface enables the manager to enter instructions and information into the expert system and to receive information from it. The instructions specify the parameters that guide the expert system through its reasoning processing. The information is in the form of values assigned to certain variables.(c) The knowledge base contains both facts that describe the problem area and knowledge representation techniques that describe how the facts fit together in a logical manner. The term problem domain is used to describe the problem area.(d) An expert system, also called a knowledge-based system, is an artificial intelligence system that applies reasoning capabilities to reach a conclusion. Expert systems are excellent for diagnostic and prescriptive problems.(e) The DSS is not intended to replace the manager. The computer can be applied to the structured portion of the problem, but the manager is responsible for the unstructured portion——applying judgment or intuition and conducting analyses.Unit 10The linked list (see figure 1) consists of a series of nodes, which are not necessarily adjacent in memory. Each node contains the element and a link to a node containing its successor. We call this the next link. The last cell’s next link references null.To execute printList or find(x) we merely start at the first node in the list and then traverse the list by following the next links. This operation is clearly linear-time, as in the array implementation, although the constant is likely to be larger than if an array implementation were used. The findKth operation is no longer quite as efficient as an array implementation; findKth(i) takes O(i) time and works by traversing down the list in the obvious manner. In practice, this bound is pessimistic, because frequently the calls to findKth are in sorted order (by i). As an example, findKth(2), findKth(3), findKth(4), and findKth(6) can all be executed in one scan down the list.The remove method can be executed in one next reference change. Figure 2 shows the result of deleting the second element in the original list.The insert method requires obtaining a new node from the system by using a new call and then executing two reference maneuvers. The general idea is shown in figure 3. The dashed line represents the old next reference.figure 1figure 2figure 3Unit 11(a) A set is pure if all of its members are sets, all members of its members are sets, and so on. For example, the set containing only the empty set is a nonempty pure set.(b) A language is a describable set of finite strings, drawn from a fixed alphabet. A grammar is one way to "describe" the language. The grammar consists of a finite list of rules, where each rule replaces one substring with another. The string on the left must contain at least one nonterminal. The first string "produces" or "generates" the second. Thus a rule is also called a production.(c) A finite-state machine (FSM) or finite-state automaton（FA）is a mathematical abstraction sometimes used to design digital logic or computer programs. It is a behavior model composed of a finite number of states, transitions between those states, and actions, similar to a flow graph in which one can inspect the way logic runs when certain conditions are met.(d) Sometimes it is inconvenient or impossible to describe a set by listing all of its elements. Another useful way to define a set is by specifying a property that the elements of the set have in common. The notation P(x) is used to denote a sentence or statement P concerning the variable object x. The set defined by P(x) written {x | P(x)}, is just a collection of all the objects for whichP is true.Unit 12(a) Because drawings are typically displayed in 3D, CAD is especially helpful in designing automobiles, aircraft, ships, buildings, electrical circuits (including computer chips), and even clothing.(b) Computer-integrated manufacturing (CIM) is the manufacturing approach of using computers to control the entire production process. This integration allows individual processes to exchange information with each other and initiate actions. Through the integration of computers, manufacturing can be faster and less error-prone, although the main advantage is the ability to create automated manufacturing processes.(c) In addition to supporting decision making, coordination, and control, information system may also help managers and workers analyze problems, visualize complex subjects, and create new products.(d) Knowing the history and evolution of ERP is essential to understanding its current application and its future developments.(e) In addition to monitoring operational activities such as tracking the status of orders and inventory levels, enterprise system also improve organization-wide reporting and decision making.Unit 13(a) There are a wide variety of educational application programs available. Educational software is designed to teach one or more skills, such as reading, math, spelling, a foreign language, world geography, or to help prepare for standardized tests.(b) Electronic business (e-business) is the use of information technology and electronic communication networks to exchange business information and conduct transactions in electronic, paperless form.(c) Word processing software allows you to use computers to create, edit, store, and print documents. You can easily insert, delete, and move words, sentences, and paragraphs——without ever using an eraser.(d) What is a spreadsheet? Spreadsheet software takes its name from the accountant’s columnar worksheet, which it imitates. A spreadsheet is a worksheet consisting of a collection of cells formed by the intersection of rows and columns. Each cell can store one piece of information: a number, word or phrase, or formula.Unit 14(a) A geographic information system (GIS) is a system that captures, stores, analyzes, manages and presents data with reference to geographic location data. In the simplest terms, GIS is the merging of cartography, statistical analysis and database technology.(b) The GPS receiver uses the messages it receives to determine the transit time of each message and computes the distance to each satellite. These distances along with the satellites' locations are used to compute the position of the receiver. This position is then displayed, perhaps with a moving map display or latitude and longitude; elevation information may be included.(c) Virtual reality (VR) is a term that applies to computer-simulated environments that can simulate physical presence in the real world. Most current virtual reality environments areprimarily visual experiences, displayed either on a computer screen or through special stereoscopic displays, but some simulations include additional sensory information, such as sound through speakers or headphones.Unit 15(a) The software development process is sometimes called the software development life cycle (SDLC), because it describes the life of a software product from its conception to its implementation, delivery, use, and maintenance.(b) How can the CMM help your organization? There are three key roles the CMM plays. First, the CMM helps build an understanding of software process by describing the practices that contribute to a level of process maturity. The second role of the CMM is to provide a consistent basis for conducting appraisals of software processes. The CMM’s third key role is to serve as a blueprint for software process improvement.(c) The UML offers a standard way to write a system’s blueprints, including conceptual things such as business processes and system functions as well as concrete things such as programming language statements, database schemas, and reusable software components. The UML represents a collection of the best engineering practices that have proven successful in the modeling of large and complex systems.(d) Object modeling is a technique for identifying objects within the system environment and the relationships between those objects. The object-oriented approach to system development is based on several concepts, such as object, attribute, behavior, encapsulation, class, inheritance, polymorphism, persistence, etc.Unit 16“Security” is an all-encompassing term that describes all the concepts, techniques, and technologies to protect information from unauthorized access. There are several requirements for information security.Confidentiality: hiding data, usually with encryption, to prevent unauthorized viewing and access.Authenticity: the ability to know that the person or system you are communicating with is who or what you think it is.Access control: once a person or system has been authenticated, their ability to access data and use systems is determined by access controls.Data integrity: providing assurance that an information system or data is genuine.Availability: making sure that information is available to users in a secure way.To prevent unauthorized access, some type of identification procedure must be used. These vary from passwords to physical access object (access cards, etc.) to biometric devices that verify some type of personal characteristic, such as a fingerprint.Some of the most secure access control systems address both identification and authentication. Identification involves verifying that the person’s name or other identifying feature is listed as an authorized user; authentication refers to determining whether or not the person is actually who he or she claims to be.Unit 17A distributed system is a collection of independent computers which appear to the users of system as a single computer. Nearly all large software systems are distributed. For example, enterprise-wide business systems must support multiple users running common applications across different sites.A distributed system encompasses a variety of applications, their underlying support software, the hardware they run on, and the communication links connecting the distributed hardware. The largest and best-known distributed system is the set of computers, software, and services comprising the World Wide Web, which is so pervasive that it coexists with and connects to most other existing distributed systems. The most common distributed systems are networked client/server systems. Distributed systems share the general properties described below.●Multiple nodes●Message passing or communication●Resource sharing●Decentralized control●Concurrency or parallelism●Fault tolerance●Heterogeneity●OpennessDistributed systems have many inherent advantages, especially over centralized systems. Some applications are inherent distributed as well. In general, distributed systems:●Yield higher performance●Allow incremental growth●Allow one user to run a program on many different machines in parallel●Provide higher reliability。

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。

【VIP专享】大学计算机英语第四版课后习题答案

第七章：1.file server 文件服务器2.carrier sense 载波检测，载波监听3.protocol suite 协议组，协议集4.peer-to-peer model 对等模型5.bus topology network 总线拓扑网络6.inter-machine cooperation 机器间合作，计算机间合作7.Ethernet protocol collection 以太网协议集8.proprietary network 专有网络9.utility package 实用软件包，公用程序包10.star network 星形网络11.局域网 local area network (LAN)12.令牌环 token ring13.无线网络 wireless network14.封闭式网络 closed network15.环形拓扑结构 ring topology16.客户机／服务器模型 client/server model17.网络应用程序 network application18.进程间通信 interprocess communication19.打印服务器 print server 20.广域网 wide area network (WAN)1.routing path 路由选择通路2.dual-ring topology 双环形拓扑结构3.extended star topology 扩展星形拓扑结构4.backbone network 基干网，骨干网5.mesh topology 网格拓扑结构6.同轴电缆 coaxial cable7.逻辑拓扑结构 logical topology8.无冲突连网环境collision-free networking environment9.树形拓扑结构 tree topology10.目的地节点 destination node1.destination address 目的地址2.performance degradation 性能退化（或降级）3.four-interface bridge 4接口网桥mon bus 公共总线，公用总线5.数据链路层 data-link layer6.协议转换器 protocol converter7.开放式系统互连OSI (Open SystemsInterconnection)8.物理地址 physical address第八章：1.cell phone 蜂窝电话，移动电话，手机2.IP address 网际协议地址，IP地址3.autonomous system 自主系统4.dial-up connection 拨号连接work identifier 网络标识符6.binary notation 二进制记数法7.mnemonic name 助记名，缩写名8.Internet-wide directory system 因特网范围的目录系统 server 名称服务器10.Internet infrastructure 因特网基础结构11.助记地址 mnemonic address12.网吧 cyber cafe13.宽带因特网访问 broadband Internet access14.顶级域名 top-level domain (TLD)15.因特网编址 Internet addressing16.点分十进制记数法 dotted decimal notation17.因特网服务提供商 Internet service provider (ISP)18.专用因特网连接 dedicated Internet connection19.主机地址 host address20.硬件与软件支持 hardware and software support1.incoming message 来报，到来的报文2.application layer 应用层3.utility software 实用软件4.sequence number （顺）序号，序列号5.remote login capabilities 远程登录能力6.端口号 port number7.软件例程 software routine8.传输层 transport layer9.文件传送协议 FTP（File Transfer Protocol）10.万维网浏览器 Web browser1.wildcard character 通配符2.Copy command 复制命令3.search operator 搜索算符4.home page 主页5.回车键 Enter key6.搜索引擎 search engine7.嵌入代码 embedded code8.超文本标记语言 Hypertext Markup Language第九章：1.server farm 大型机服务器2.access protocol 存取协议，访问协议3.storage area network 存储区域网（络）4.high-throughput computing 高吞吐（量）计算5.server cluster 服务器集群6.public cloud 公共云7.grid computing 网格计算8.security-aware cloud architecture 具有安全意识的云体系结构9.social networking 社交网络10.utility computing 效用计算11.云计算提供商 cloud computing provider12.存储芯片 memory chip13.基于内部网的私有云 intranet-based private cloud14.网络带宽 network bandwidth15.混合云 hybrid cloud16.磁盘阵列 disk array17.软件即服务 Software as a Service (SaaS)18.集群计算 cluster computing 19.虚拟化计算机资源 virtualized computer resources20.多核处理器 multi-core processorputer vision 计算机视觉2.ubiquitous computing 普适计算mand line 命令行4.data logging system 数据记录（或登录）系统5.augmented reality 增强现实6.移动网络 mobile network7.平板电脑 tablet computer8.物联网 Internet of Things9.智能电网 smart power grid10.传感器融合 sensor fusion1.notebook computer 笔记本2.wireless hotspot 无线热点3.Short Message Service 短信（服务）4.wearable computer 可穿戴计算机，穿戴式计算机5.移动电话 mobile phone6.条形码阅读器 barcode reader7.网站 Web site8.智能手机 smart phone第十章：1.backup system 备份系统2.encryption key （加密）密钥3.data confidentiality 数据机密性4.system vulnerability 系统脆弱性，系统脆弱之处5.unauthorized access 未经授权的访问，越权存取6.intrusion detection system 入侵检测系统7.after-action recovery 事后恢复8.software piracy 软件侵权9.authorized user 特许用户10.data unit 数据单元，数据单位11.软件版本 software version12.数据完整性 data integrity13.系统崩溃 system crash14.病毒检查软件 virus-checking software15.综合安全策略 comprehensive security strategy16.软件配置管理 software configuration management17.故障隔离 fault isolation18.统计数据库 statistical database 19.保密的加密算法 secure encryption algorithm20.数据流 data stream1.phishing attack 网络钓鱼攻击2.graphics card 显（示）卡3.heuristic analysis 试探性分析4.infected file 被感染文件5.virus dictionary 病毒字典6.数据捕获 data capture7.恶意软件 malicious software8.病毒特征代码 virus signature9.防病毒软件 antivirus software10.内存驻留程序 memory-resident program1.maintenance hook 维护陷阱2.multipartite virus 多成分病毒3.authentication procedure 验证过程，认证过程4.instant messaging 即时通信，即时消息5.系统登录程序 system login program6.逻辑炸弹 logic bomb7.多威胁恶意软件 multiple-threat malware8.源代码 source code第十一章：1.mailing list 邮件发送清单，邮件列表2.proprietary software 专有软件 line 抄送行4.bcc line 密送行5.forwarded e-mail message 转发的电子邮件6.e-mail convention 电子邮件常规7.click on an icon 点击图标8.confidential document 密件，秘密文件9.classified information 密级信息10.recovered e-mail message 恢复的电子邮件11.常用情感符 commonly used emoticon12.已删除电子邮件 deleted e-mail13.电子系统 electronic system14.附件行 Attachments line15.版权法 copyright law16.电子邮件网规 e-mail netiquette17.信息高速公路 information superhighway18.签名文件 signature file19.电子数据表程序 spreadsheet program20.文字处理软件 word processor1.web-authoring software 网络写作软件2.template generator 模版生成程序3.navigation page 导航页面4.corporate logo 公司标识5.splash page 醒目页面，过渡页6.导航条 navigation bar7.节点页面 node page8.网站地图 site map9.可用性测试 usability testing10.图形交换格式 gif（Graphics Interchange Format）1.message board 留言板，消息板2.software vendor 软件供应商，软件厂商3.anonymous message 匿名消息4.video clip 视频剪辑，视频片段5.过滤软件 filtering software6.版权侵犯 copyright infringement7.网络中立性 network neutrality8.网络运营商 network operator第十二章：1.customized marketing strategy 定制的营销策略2.B2G transaction 企业对政府交易3.dial-up modem 拨号调制解调器4.dot-com bust 网络不景气5.smart card 智能卡6.digital piracy 数字盗版7.dot-com boom 网络繁荣8.C2C transaction 消费者对消费者交易9.Web auction site 拍卖网站10.fingerprint reader 指纹读取器11.射频识别装置radio-frequency identification (RFID) device12.电子数据交换 electronic data interchange (EDI)13.库存管理技术 inventory management technology14.知识产权 intellectual property15.条形码 bar code16.货币兑换 currency conversion17.电子图书 electronic book18.视网膜扫描仪 retina scanner19.个人数字助理 personal digital assistant (PDA)20.企业对企业电子商务 B2B electronic commerce1.software suite 软件套件2.text box 文本框3.virtual checkout counter 虚拟付款台4.static catalog 静态目录5.browser session 浏览器会话期6.动态目录 dynamic catalog7.购物车软件 shopping cart software8.供应链 supply chain9.企业资源计划软件enterprise resource planning (ERP) software10.税率 tax rate1.privacy policy 隐私政策2.identity theft 身份（信息）盗取3.affiliate marketing 联属网络营销，联盟营销4.postal money order 邮政汇票5.零售网站 retail website6.信用卡 credit card7.货到付款 cash on delivery8.安全套接层 Secure Sockets Layer。

计算机英语第四版课后答案姜同强

计算机英语第四版课后答案姜同强1、He was proud of what he had done. [单选题] *A. 对…感到自豪(正确答案)B. 对…感到满足C. 对…表示不满D. 对…表示后悔2、Jack would rather spend time complaining than_____the problem by himself. [单选题] *A.solve(正确答案)B.solvedC.solvesD.to solve3、They all choose me ______ our class monitor.（）[单选题] *A. as(正确答案)B. inC. withD. on4、73．The moonlight goes ____ the window and makes the room bright. [单选题] * A．acrossB．through(正确答案)C．overD．in5、My friends will _______ me at the airport when I arrive in London. [单选题] *A. takeB. meet(正确答案)C. receiveD. have6、She works in a hospital. She is a(n) _______. [单选题] *A. managerB. engineerC. doctor(正确答案)D. patient7、We ______ boating last weekend.（）[单选题] *A. goB. went(正确答案)C. are goingD. will go8、The young man had decided to give up the chance of studying abroad, _____ surprised his parents a lot. [单选题] *A. whenB. whereC. which(正确答案)D. that9、I’m sorry there are ______ apples in the fridge. You must go and buy some right now.（）[单选题] *A. a littleB. littleC. a fewD. few(正确答案)10、62．--There is? ? ? ? ? sale on in the shop today. Let’s go together.--Please wait? ? ? ? ? ?minute. I’ll finish my homework first. [单选题] *A．a; theB．a; a(正确答案)C．the; aD．the; the11、Experts are making an investigation on the spot. They want to find a way to（）the tower. [单选题] *A. Restore(正确答案)B. resumeC. recoverD. reunite12、A modern city has sprung up in _____was a waste land ten years ago. [单选题] *A.whichB.what(正确答案)C.thatD.where13、I like this house with a beautiful garden in front, but I don't have enough money to buy _____. [单选题] *A. it(正确答案)B. oneC. thisD. that14、I used to take ____ long way to take the bus that went by ____ tunnel under the water. [单选题] *A. a, aB. a. theC. a, /(正确答案)D. the, a15、My brother usually _______ his room after school. But now he _______ soccer. [单选题] *A. cleans; playsB. cleaning; playingC. cleans; is playing(正确答案)D. cleans; is playing the16、On Easter children _______ eggs around the house. [单选题] *A. hunt for(正确答案)B. send forC. prepare forD. ask for17、83．The school is? ? ? ? ? ? ?the hospital. [单选题] *A．withB．intoC．ontoD．opposite(正确答案)18、--Jimmy, you are supposed to?_______ your toys now.--Yes, mom. [单选题] *A. put upB. put onC. put away(正确答案)D. put down19、We’re proud that China _______ stronger and stronger these years. [单选题] *A. will becomeB. becameC. is becoming(正确答案)D. was becoming20、We moved to the front row_____we could hear and see better. [单选题] *A. so asB. so that(正确答案)C. becauseD. such that21、How lovely a day,（）? [单选题] *A. doesn't itB. isn't it(正确答案)C.shouldn't itD.hasn't it22、I passed the test, I _____ it without your help. [单选题] *A.would not passB. wouldn't have passed(正确答案)C. didn't passD.had not passed23、If you want to _______, you’d better eat more healthy food and do more exercise. [单选题] *A. keep fatB. keep calmC. keep healthy(正确答案)D. keep on24、_____ Lucy _____ Lily has joined the swimming club because they have no time. [单选题] *A. Not only; but alsoB. Neither; nor(正确答案)C. Either; orD. Both; and25、I’d like to go with you, ______ I’m too busy. [单选题] *A. orB. andC. soD. but(正确答案)26、She talks too much; you’ll be glad when you’re free of her. [单选题] *A. 与她自由交谈B. 离开她(正确答案)C. 受她的控制D. 与她在一起27、41．—________ do you take?—Small, please. [单选题] *A．What size(正确答案)B．What colourC．How manyD．How much28、You wouldn't have seen her if it _____ not been for him . [单选题] *A. hasB. had(正确答案)C. haveD．is having29、When you have trouble, you can _______ the police. They will help you. [单选题] *A. turn offB. turn to(正确答案)C. turn onD. turn over30、In the closet（）a pair of trousers his parents bought for his birthday. [单选题] *A. lyingB. lies(正确答案)c. lie D. is lain。

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] 1. F 2. T 3. T 4. F 5. T 6. T 7. T 8. T 9. T 10. F [Ex 2] 1. input, storage, processing, and output 2. power; speed; memory3. central processing unit4. internal; primary; memory5. keyboard; central processing unit; main memory; monitor[Ex 3] A. 1. F 2. D 3. G 4. C 5. B 6. A 7. E 8. HB. 1. user 2. monitor 3. data 4. keyboard 5. data processing6. information7. computer8. memory[Ex 4] 1. input device 2. screen, screen 3. manipulates 4. instructions 5. retrieve6. code7. hard copy8. Function[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. Their presence opens a new era in the field of IT technologies and means that the cloud technology is getting closer.These 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.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XeonE5-2600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。

《计算机专业英语(第4版)》Unit 1 Hardware Knowledge

• Gates did not have a definite study plan while a student at Harvard and spent a lot of time using the school's computers.
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• Gates stepped down as chief executive officer of Microsoft in January 2000.
• He remained as chairman and created the position of chief software architect.
• In June 2006, Gates announced that he would be transitioning from full-time work at Microsoft to part-time work, and full-time work at the Bill & Melinda Gates Foundation.
four basic units of simplified computer: the input unit, central processing unit (CPU), memory unit, and output unit.
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1.2 Computer Development
1.2.1 Text A • The hardware of a digital computer system

计算机英语(第4版)课文翻译与课后答案

第一部分《计算机英语》参考译文第一单元：计算机与计算机科学课文A：计算机概览一、引言计算机是一种电子设备，它能接收一套指令或一个程序，然后通过对数字数据进行运算或对其他形式的信息进行处理来执行该程序。

要不是由于计算机的发展，现代的高科技世界是不可能产生的。

不同类型和大小的计算机在整个社会被用于存储和处理各种数据，从保密政府文件、银行交易到私人家庭账目。

计算机通过自动化技术开辟了制造业的新纪元，而且它们也增强了现代通信系统的性能。

在几乎每一个研究和应用技术领域，从构建宇宙模型到产生明天的气象报告，计算机都是必要的工具，并且它们的应用本身就开辟了人们推测的新领域。

数据库服务和计算机网络使各种各样的信息源可供使用。

同样的先进技术也使侵犯个人隐私和商业秘密成为可能。

计算机犯罪已经成为作为现代技术代价组成部分的许多风险之一。

二、历史第一台加法机是法国科学家、数学家和哲学家布莱斯?帕斯卡于1642年设计的，它是数字计算机的先驱。

这个装置使用了一系列带有10个齿的轮子，每个齿代表从0到9的一个数字。

轮子互相连接，从而通过按照正确的齿数向前转动轮子，就可以将数字彼此相加。

17世纪70年代，德国哲学家和数学家戈特弗里德?威廉?莱布尼兹对这台机器进行了改良，设计了一台也能做乘法的机器。

法国发明家约瑟夫―玛丽?雅卡尔，在设计自动织机时，使用了穿孔的薄木板来控制复杂图案的编织。

在19世纪80年代期间，美国统计学家赫尔曼?何勒里斯，想出了使用类似雅卡尔的木板那样的穿孔卡片来处理数据的主意。

通过使用一种将穿孔卡片从电触点上移过的系统，他得以为1890年的美国人口普查汇编统计信息。

1、分析机也是在19世纪，英国数学家和发明家查尔斯?巴比奇，提出了现代数字计算机的原理。

他构想出旨在处理复杂数学题的若干机器，如差分机。

许多历史学家认为，巴比奇及其合伙人，数学家奥古斯塔?埃达?拜伦，是现代数字计算机的真正先驱。

巴比奇的设计之一，分析机，具有现代计算机的许多特征。

计算机英语(第4版)课文翻译与课后答案

计算机英语(第4版)课文翻译与课后答案《计算机英语》参考译文第一单元：计算机与计算机科学课文A：计算机概览一、引言计算机是一种电子设备，它能接收一套指令或一个程序，然后通过对数字数据进行运算或对其他形式的信息进行处理来执行该程序。

要不是由于计算机的发展，现代的高科技世界是不可能产生的。

不同类型和大小的计算机在整个社会被用于存储和处理各种数据，从保密政府文件、银行交易到私人家庭账目。

计算机通过自动化技术开辟了制造业的新纪元，而且它们也增强了现代通信系统的性能。

数据库服务和计算机网络使各种各样的信息源可供使用。

同样的先进技术也使侵犯个人隐私和商业秘密成为可能。

计算机犯罪已经成为作为现代技术代价组成部分的许多风险之一。

二、历史第一台加法机是法国科学家、数学家和哲学家布莱斯?帕斯卡于1642年设计的，它是数字计算机的先驱。

这个装置使用了一系列带有10个齿的轮子，每个齿代表从0到9的一个数字。

轮子互相连接，从而通过按照正确的齿数向前转动轮子，就可以将数字彼此相加。

17世纪70年代，德国哲学家和数学家戈特弗里德?威廉?莱布尼兹对这台机器进行了改良，设计了一台也能做乘法的机器。

法国发明家约瑟夫―玛丽?雅卡尔，在设计自动织机时，使用了穿孔的薄木板来控制复杂图案的编织。

在19世纪80年代期间，美国统计学家赫尔曼?何勒里斯，想出了使用类似雅卡尔的木板那样的穿孔卡片来处理数据的主意。

通过使用一种将穿孔卡片从电触点上移过的系统，他得以为1890年的美国人口普查汇编统计信息。

1、分析机也是在19世纪，英国数学家和发明家查尔斯?巴比奇，提出了现代数字计算机的原理。

他构想出旨在处理复杂数学题的若干机器，如差分机。

许多历史学家认为，巴比奇及其合伙人，数学家奥古斯塔?埃达?拜伦，是现代数字计算机的真正先驱。

计算机专业英语教程第四版翻译课后练习题含答案

计算机专业英语教程第四版翻译课后练习题含答案简介《计算机专业英语教程》是针对计算机专业学生编写的一本英语教材。

本书旨在帮助学生通过学习计算机领域的专业英语词汇和语法，提升他们的英语能力和技能。

本文将为读者提供该教材第四版的课后练习题及答案。

第一课练习题1.将下列单词从易到难排序：chip, computer, algorithm, software,desktop2.将下列单词从中文翻译为英文：程序设计，硬件，操作系统，输入，输出3.请解释下列缩略语的全称：RAM，CPU，OS答案1.desktop, chip, computer, software, algorithm2.programming, hardware, operating system, input, output3.RAM（Random Access Memory），CPU（Central Processing Unit），OS（Operating System）第二课练习题1.请翻译下列句子：计算机的功能越来越强大，它可以执行许多任务。

2.请解释下列单词的意思：interface，protocol，server，router答案puters are becoming more and more powerful and they canperform many tasks.2.interface（接口）, protocol（协议），server（服务器），router（路由器）第三课练习题1.请将下列单词按字母顺序排列：database，file，program，server，storage2.请填写下列句子的空格：计算机会读取从硬盘 __ （into）内存。

3.请解释下列单词的意思：database，algorithm，client，browser答案1.algorithm，database，file，program，server，storage2.into3.database（数据库），algorithm（算法），client（客户端），browser（浏览器）第四课练习题1.请翻译下列句子：今天我学会了如何编写计算机程序。

《计算机英语(第4版)》课后练习参考答案

Unit Two/Section AI.Fill in the blanks with the information given in the text:1.input; output; storage2.Basic Input/Output System3.flatbed; hand-held4.LCD-based5.dot-matrix; inkjet6.disk; memory7.volatile8.serial; parallelII.Translate the following terms or phrases from English into Chinese and vice versa:1.function key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.address bus 地址总线5.flatbed scanner 平板扫描仪6.dot-matrix printer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volatile 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 Inpul/Output System)changes if necessary:An access control mechanism mediates between a user （or a process executing on behalf of a user） and system resources、such as applications, operating systems, firewalls, routers, files, and databases. The system must first authenticate（验证）a user seeking access. Typically the authemiccition function determines whether the user is permitted to access the system at all. Then the access control function determines if the specific requested access by this user is permitted. A security administrator maintains an authorization（授权）d-sbase that specifies what type of access to which resources is allowed for this user. The access control function consults this database to detemine whether to grant access. An auditing function monitors and keeps a record of user accesses to system resources.In practice, a number of com—cmetus may cooperatively share the access control function. All mii,戏systems have at least a rudimentary（基本的），and in many cases a quite robust. access control component. Add-on security packages can add to the witi*access control capabilities of the OS. Particular applications or utilities,such as a database management system, also incorporate access control functions. External devices, such as firewalls, can also provide access control services.IV. Translate the following passage from English into Chinese:入侵者攻击从温和的到严重的形形色色。

《计算机英语（第4版）》课后练习A部分第二题答案讲课教案

《计算机英语（第4版）》课后练习A部分第二题答案讲课教案《计算机英语(第4版)》课后练习A部分第二题答案计算机英语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 substrate 硅衬底10. vacuum tube 真空管11. 数据的存储与处理 the storage and handling of data12. 超大规模集成电路 very large-scale integrated circuit13. 中央处理器 central processing unit14. 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 operating instructions20. 输入设备 input device1. function key 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. address bus 地址总线5. flatbed scanner 平板扫描仪6. dot-matrix printer 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 system收集于网络，如有侵权请联系管理员删除12. 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 volatile 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 display1. 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 executable program12. 程序模块 program module13. 条件语句 conditional statement14. 赋值语句 assignment statement15. 逻辑语言 logic language16. 机器语言 machine language17. 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 program20. 计算机程序员 computer programmer1. inference engine 推理机2. system call 系统调用收集于网络，如有侵权请联系管理员删除3. compiled language 编译执行的语言4. parallel 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 routine 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11. 解释执行的语言 interpreted language12. 设备驱动程序 device driver13. 源程序 source program14. 调试程序 debugging program15. 目标代码 object code16. 应用程序 application program17. 实用程序 utility program18. 逻辑程序 logic program19. 墨盒 ink cartridge20. 程序的存储与执行 program storage and execution1. system specification 系统规格说明2. unit testing 单位（或单元、部件）测试3. software life cycle 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 formatting 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. 需求分析与定义 requirements analysis and definition13. 探索式编程方法 exploratory programming approach收集于网络，如有侵权请联系管理员删除14. 系统文件编制 system documentation15. 瀑布模型 waterfall model16. 系统集成 system integration17. 商用现成软件 commercial off-the-shelf (或COTS) software18. 基于组件的软件工程component-based software engineering (CBSE)19. 软件维护工具 software maintenance tool20. 软件复用 software reuse1. end user 最终用户，终端用户2. atomic operation 原子操作3. database administrator 数据库管理员4. relational database model 关系数据库模型5. local data 本地数据6. object-oriented database 面向对象数据库7. database management system (DBMS) 数据库管理系统8. entity-relationship model (ERM) 实体关系模型9. distributed database 分布式数据库10. flat file 平面文件11. 二维表 two-dimensional table12. 数据属性 data attribute13. 数据库对象 database object14. 存储设备 storage device15. 数据类型 data type16. 数据插入与删除 data insertion and deletion17. 层次数据库模型 hierarchical database model18. 数据库体系结构 database architecture19. 关系数据库管理系统relational database management system (RDBMS)20. 全局控制总线 global control bus1. file server 文件服务器2. carrier sense 载波检测，载波监听3. protocol suite 协议组，协议集4. peer-to-peer model 对等模型收集于网络，如有侵权请联系管理员删除5. bus topology network 总线拓扑网络6. inter-machine cooperation 机器间合作，计算机间合作7. Ethernet protocol collection 以太网协议集8. proprietary network 专有网络9. utility package 实用软件包，公用程序包10. star network 星形网络11. 局域网 local area network (LAN)12. 令牌环 token ring13. 无线网络 wireless network14. 封闭式网络 closed network15. 环形拓扑结构 ring topology16. 客户机／服务器模型 client/server model17. 网络应用程序 network application18. 进程间通信 interprocess communication19. 打印服务器 print server20. 广域网 wide area network (WAN)1. cell phone 蜂窝电话，移动电话，手机2. IP address 网际协议地址，IP地址3. autonomous system 自主系统4. dial-up connection 拨号连接5. network identifier 网络标识符6. binary notation 二进制记数法7. mnemonic name 助记名，缩写名8. Internet-wide directory system 因特网范围的目录系统9. name server 名称服务器10. Internet infrastructure 因特网基础结构11. 助记地址 mnemonic address12. 网吧 cyber cafe13. 宽带因特网访问 broadband Internet access14. 顶级域名 top-level domain (TLD)15. 因特网编址 Internet addressing收集于网络，如有侵权请联系管理员删除16. 点分十进制记数法 dotted decimal notation17. 因特网服务提供商 Internet service provider (ISP)18. 专用因特网连接 dedicated Internet connection19. 主机地址 host address20. 硬件与软件支持 hardware and software support1. server farm 大型机服务器2. access protocol 存取协议，访问协议3. storage area network 存储区域网（络）4. high-throughput computing 高吞吐（量）计算5. server cluster 服务器集群6. public cloud 公共云7. grid computing 网格计算8. security-aware cloud architecture 具有安全意识的云体系结构9. social networking 社交网络10. utility computing 效用计算11. 云计算提供商 cloud computing provider12. 存储芯片 memory chip13. 基于内部网的私有云 intranet-based private cloud14. 网络带宽 network bandwidth15. 混合云 hybrid cloud16. 磁盘阵列 disk array17. 软件即服务 Software as a Service (SaaS)18. 集群计算 cluster computing19. 虚拟化计算机资源 virtualized computer resources20. 多核处理器 multi-core processor1. backup system 备份系统2. encryption key （加密）密钥3. data confidentiality 数据机密性4. system vulnerability 系统脆弱性，系统脆弱之处5. unauthorized access 未经授权的访问，越权存取6. intrusion detection system 入侵检测系统收集于网络，如有侵权请联系管理员删除7. after-action recovery 事后恢复8. software piracy 软件侵权9. authorized user 特许用户10. data unit 数据单元，数据单位11. 软件版本 software version12. 数据完整性 data integrity13. 系统崩溃 system crash14. 病毒检查软件 virus-checking software15. 综合安全策略 comprehensive security strategy16. 软件配置管理 software configuration management17. 故障隔离 fault isolation18. 统计数据库 statistical database19. 保密的加密算法 secure encryption algorithm20. 数据流 data stream1. mailing list 邮件发送清单，邮件列表2. proprietary software 专有软件3. cc line 抄送行4. bcc line 密送行5. forwarded e-mail message 转发的电子邮件6. e-mail convention 电子邮件常规7. click on an icon 点击图标8. confidential document 密件，秘密文件9. classified information 密级信息10. recovered e-mail message 恢复的电子邮件11. 常用情感符 commonly used emoticon12. 已删除电子邮件 deleted e-mail13. 电子系统 electronic system14. 附件行 Attachments line15. 版权法 copyright law16. 电子邮件网规 e-mail netiquette17. 信息高速公路 information superhighway收集于网络，如有侵权请联系管理员删除18. 签名文件 signature file19. 电子数据表程序 spreadsheet program20. 文字处理软件 word processor1. customized marketing strategy 定制的营销策略2. B2G transaction 企业对政府交易3. dial-up modem 拨号调制解调器4. dot-com bust 网络不景气5. smart card 智能卡6. digital piracy 数字盗版7. dot-com boom 网络繁荣8. C2C transaction 消费者对消费者交易9. Web auction site 拍卖网站10. fingerprint reader 指纹读取器11. 射频识别装置 radio-frequency identification (RFID) device12. 电子数据交换 electronic data interchange (EDI)13. 库存管理技术 inventory management technology14. 知识产权 intellectual property15. 条形码 bar code16. 货币兑换 currency conversion17. 电子图书 electronic book18. 视网膜扫描仪 retina scanner19. 个人数字助理 personal digital assistant (PDA)20. 企业对企业电子商务 B2B electronic commerce收集于网络，如有侵权请联系管理员删除。

计算机英语(第4版)课文翻译与课后答案

《计算机英语》参考译文第一单元：计算机与计算机科学课文A：计算机概览一、引言计算机是一种电子设备，它能接收一套指令或一个程序，然后通过对数字数据进行运算或对其他形式的信息进行处理来执行该程序。

要不是由于计算机的发展，现代的高科技世界是不可能产生的。

不同类型和大小的计算机在整个社会被用于存储和处理各种数据，从保密政府文件、银行交易到私人家庭账目。

计算机通过自动化技术开辟了制造业的新纪元，而且它们也增强了现代通信系统的性能。

数据库服务和计算机网络使各种各样的信息源可供使用。

同样的先进技术也使侵犯个人隐私和商业秘密成为可能。

计算机犯罪已经成为作为现代技术代价组成部分的许多风险之一。

二、历史第一台加法机是法国科学家、数学家和哲学家布莱斯?帕斯卡于1642年设计的，它是数字计算机的先驱。

这个装置使用了一系列带有10个齿的轮子，每个齿代表从0到9的一个数字。

轮子互相连接，从而通过按照正确的齿数向前转动轮子，就可以将数字彼此相加。

17世纪70年代，德国哲学家和数学家戈特弗里德?威廉?莱布尼兹对这台机器进行了改良，设计了一台也能做乘法的机器。

法国发明家约瑟夫―玛丽?雅卡尔，在设计自动织机时，使用了穿孔的薄木板来控制复杂图案的编织。

在19世纪80年代期间，美国统计学家赫尔曼?何勒里斯，想出了使用类似雅卡尔的木板那样的穿孔卡片来处理数据的主意。

通过使用一种将穿孔卡片从电触点上移过的系统，他得以为1890年的美国人口普查汇编统计信息。

1、分析机也是在19世纪，英国数学家和发明家查尔斯?巴比奇，提出了现代数字计算机的原理。

他构想出旨在处理复杂数学题的若干机器，如差分机。

许多历史学家认为，巴比奇及其合伙人，数学家奥古斯塔?埃达?拜伦，是现代数字计算机的真正先驱。

巴比奇的设计之一，分析机，具有现代计算机的许多特征。

《计算机英语(第4版)》课后练习参考答案

Unit Four/Section BI. Fill in the blanks with the information given in the text:1. Information engineering emphasizes a modeling tool called entityrelationship diagrams.2. One of the disadvantages of model-driven development is the long durationof projects.3. Unlike structured analysis and design and information engineering,object-oriented analysis and design attempt to emerge the data and process concerns into singular constructs called objects.4. Unlike logical models, physical models show not only what a system is ordoes , but also how the system is physically and technically implemented.II. Translate the following terms or phrases from English into Chinese and vice versa:1. check box 复选框.选择框.校验框2. structured design 结构化设计3. building block 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 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 (或pull-down) menu10. 滚动条 scroll barUnit Five: Software ProcessUnit Five/Section AI. Fill in the blanks with the information given in the text:1. New software may be developed from scratch or through the use of existingsystems and off-the-shelf software or system components.2. The three generic process models discussed in the text are often complementaryrather than mutually exclusive, especially for large system development.3. The waterfall model is so named because of the cascade from one phase to anotherin the software development process.4. The fundamental development activities of the waterfall model arerequirements analysis and definition, system and software design, implementation and unit testing, integration and system testing, and operation and maintenance.5. The two fundamental types of evolutionary development are exploratorydevelopment and throwaway prototyping.6. The evolutionary approach is often more effective than the waterfall approachin producing systems that meet the immediate needs of customers, but it is difficult to establish a(n) stable system architecture using this approach.7. CBSE is a(n) reuse-oriented approach to software development, which relieson a large base of reusable software components and an integrating framework for these components.8. While CBSE can reduce the amount of software to be developed and the associatedcost and risks, it cannot avoid requirements compromises which may lead to a system that does not meet the real needs of users.II. Translate the following terms or phrases from English into Chinese and vice versa:1. system specification 系统规格说明2. unit testing 单位（或单元、部件）测试3. software life cycle 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 formatting 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. 需求分析与定义 requirements analysis and definition13. 探索式编程方法 exploratory programming approach14. 系统文件编制 system documentation15. 瀑布模型 waterfall model16. 系统集成 system integration17. 商用现成软件 commercial off-the-shelf (或COTS) software18. 基于组件的软件工程 component-based software engineering (CBSE)19. 软件维护工具 software maintenance tool20. 软件复用 software reuseIV. Translate the following passage from English into Chinese:Software processes are complex and, like all intellectual and creative processes, rely on people making decisions and judgments. Because of the need for judgment and creativity, attempts to automate software processes have met with limited success. Computer-aided software engineering (CASE) tools can support some process activities. However, there is no possibility, at least in the next few years, of more extensive automation where software takes over creative design from the engineers involved in the software process.One reason the effectiveness of CASE tools is limited is because of the immense diversity of software processes. There is no ideal process, and many organization have developed their own approach to software development.Processes have evolved to exploit the capabilities of the people in an organization and the specific characteristics of the systems that are being developed. For some systems, a very structured development process is required while for others a flexible, agile process is likely to be more effective.软件过程比较复杂.而且像所有其他的智能和创造性过程一样.依靠人们作出决定和判断。

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] 1. F 2. T 3. T 4. F 5. T 6. T 7. T 8. T 9. T 10. F[Ex 2] 1. input, storage, processing, and output 2. power; speed; memory3. central processing unit4. internal; primary; memory5. keyboard; central processing unit; main memory; monitor[Ex 3] A. 1. F 2. D 3. G 4. C 5. B 6. A 7. E 8. HB. 1. user 2. monitor 3. data 4. keyboard 5. data processing6. information7. computer8. memory[Ex 4] 1. input device 2. screen, screen 3. manipulates 4. instructions 5. retrieve6. code7. hard copy8. Function[Ex. 5] 新处理器开始IT技术的新时代New Processors Open New Era of IT TechnologiesLast 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. Their presence opens a new era in the field of IT technologies and means that the cloud technology is getting closer.These 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.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。

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] 1. F 2. T 3. T 4. F 5. T 6. T 7. T 8. T 9. T 10. F[Ex 2] 1. input, storage, processing, and output 2. power; speed; memory3. central processing unit4. internal; primary; memory5. keyboard; central processing unit; main memory; monitor[Ex 3] A. 1. F 2. D 3. G 4. C 5. B 6. A 7. E 8. HB. 1. user 2. monitor 3. data 4. keyboard 5. data processing6. information7. computer8. memory[Ex 4] 1. input device 2. screen, screen 3. manipulates 4. instructions 5. retrieve6. code7. hard copy8. Function[Ex. 5] 新处理器开始IT技术的新时代New Processors Open New Era of IT TechnologiesLast 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. Their presence opens a new era in the field of IT technologies and means that the cloud technology is getting closer.These 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.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。

计算机专业英语的第四版课后习题翻译

中译英参考答案Unit 1A computer system consists of hardware system and software system. The hardware of the computer is usually divided into three major parts or three primary subsystems: the CPU, the memory subsystem, and the I/O subsystem.The CPU performs many operations and controls computer. The memory subsystem is used to store program being executed by the CPU, along with the program’s data. The I/O subsystem allows the CPU to interact with input and output devices such as the keyboard and monitor of a personal computer. The components of the computer are connected to the buses.The part of the computer that performs the bulk of data processing operations is called the central processing unit and is referred to as the CPU. In microcomputer, it is often called the microprocessor. The CPU is made up of three major parts: control unit, ALU, and register set.Memory is also known as internal memory or main memory. It refers to the circuits in the computer that hold whatever programs and data are available for immediate use by the CPU.I/O subsystem includes I/O devices and interface. There are a wide variety of I/O devices, such as mouse, printer, sensor, disk, and so on. Input-output interface provides a method for transferring information between internal storage and external I/O devices. Peripherals connected to a computer need special communication links for interfacing them with the CPU. The purpose of the communication link is to resolve the differences that exist between the central computer and each peripheral.Unit 2Storage hardware provides permanent storage of information and programs for retrieval by the computer. Hard disk drives store information in magnetic particles embedded in a disk. Usually a permanent part of the computer, hard disk drives can store large amounts of information and retrieve that information very quickly.Although fixed hard drive systems offer faster access and have a higher storage capacity than optical discs, optical disc systems use removable media – a distinct benefit. Optical discs – primary CDs and DVDs – are much more widely used than removable hard drive systems. They are the standard today for software delivery, as well as commonly used for storing high-capacity music and video files. There are also versions of both CD and DVD drives available for home audio and home theater use. Optical discs are commonly referred to as compact discs.CD and DVD discs are read by CD and DVD drives. The speed of a CD or DVD drive is rated as 24x, 32x, 36x, and so on. These labels describe how fast the drive is compared to the first version of that drive. For example, a 36x drive is 36 times the speed of the baseline unit that was originally manufactured.Most optical discs have a title and other text printed only on one side and they are inserted into the drive with the printed side facing up. When inserting such a CD or DVD, be careful not to get dirt, fingerprints, scratches, or anything else that might hinder light reflectivity on the disc’s surface.Unit 3(a) A program is a list of instructions or statements for directing the computer to perform a required data processing task. Programming is a multistep process for creating that list of instructions.(b) It is important to understand the difference between a class and an object of that class. A class is simply a specification for creating objects. Thus, a single class may create multiple objects.(c) Java is an object-oriented, network-friendly high-lever programming language that allows programmers to build applications that can run on almost any operating system.(d) ActiveX is a set of controls, or reusable components that enables programs or content of almost any type to be embedded within a Web page. Whereas a Java must be downloaded each time you visit a Web site, with ActiveX the component is downloaded only once, then stored on your hard disk for later, repeated use.(e) Programming involves a great deal of creativity. The design is guide to the function or purpose of each component, but the programmer has great flexibility in implementing the design as code. No matter what language is used, each program component involves at least three major aspects: control structures, algorithms, and data structures.Unit 4The software system can be divided into two broad categories: application software and system software. Application software consists of the program for performing tasks particular to the machine’s utilization. In contrast to application software, system software comprises a large number of programs. These programs start up the computer and function as the principle coordinator of all hardware components and application software. Without system software loaded into RAM of your computer, your hardware and application software are useless.System software can be grouped into three basic parts: operating system, utility software, and language translators. The majority of an installation’s utility software consists of programs for performing activities that are fundamental to computer installations yet not included in the operating system. In a sense, utility software consists of software units that extend the capabilities of the operating system.A computer’s OS is the main collection of programs that manage its activities.The primary chores of an OS are management and control. The OS ensures that all actions requested by a user are valid and processed in an orderly fashion. It also manages the computer system’s resources to perform these operations with efficiency and consistency.Application software is the software designed to help you solve problems specific to business or perform specific business tasks. Application software then is the layer of software closest to you. Basically, there are four categories of application software: productivity software, business and specialty software, entertainment software and education/reference software.Unit 5A computer network is often classified as being either a local area network (LAN), a metropolitan area network (WAN), or a wide area network (WAN). The connection of two or more networks is called an internetwork. The worldwide Internet is a well-known example of an internetwork.LANs are privately owned networks within a single building or campus of up to a few kilometers in size. They are widely used to connect personal computers and workstations in company offices and factories to share resources and exchange information.In general, a given LAN will use only one type of transmission medium. Various topologies are possible for LANs. The most common LAN topologies are bus, ring and star.A MAN is basically a bigger version of a LAN and normally uses similar technology. MAN is designed to extend over an entire city. It may be a single network such as a cable television network, or it may be a means of connecting a number of LANs into a large network so that resources may be shared LAN-to-LAN as well as device-to-device. For example, a company can use a MAN to connect the LANs in all of its offices throughout a city.A W AN spans a large geographical area that may comprise a country, a continent, or even the world. It provides long-distance transmission of data, voice, image, and video information over large geographical area.In contrast to LANs, W ANs may utilize public leased, or private communication devices, usually in combinations, and can therefore span an unlimited number of miles.Unit 6Transmission media are used to transfer messages over a network. For instance, the transmission media used in a network may be a privately owned set of cables, the public phone lines, or a satellite system. Transmission media can either be wired or wireless.The three types of wired media most commonly used to carry messages are twisted-pair wire, coaxial cable, and fiber-optic cable. One of the most successful developments in transmission media in recent years has been fiber optics. Fiber-optic cable is commonly used for the high-speed backbone lines of a network, or for Internet infrastructure.Wireless transmission media have become especially popular in recent years. They support communications in situations in which physical wiring is impractical or inconvenient, as well as facilitate mobility. Wireless media are commonly used to connect devices to a network, to share information between computers, to connect wireless mice to a computer, and for handheld PCs, wireless phones, and other mobile devices. Radio signals transferred through the air are the heart of most types of wireless media. In addition to conventional broadcast radio application, the microwave, cellular, and satellite transmission media also use radio signals to transmit data.Radio transmissions require the use of a transmitter to send the radio signals through the air. A receiver (usually containing some type of antenna) accepts the date at the other end. When a device functions as both a receiver and transmitter, it is commonly called a transceiver or transmitter-receiver.Unit 7(a) Since many database systems users are not computer trained, developers hide the complexity from users through several levels of abstraction, to simplify user’s interactions with the system: physical level, logical level, and view level.(b) A database schema is specified by a set of definitions expressed by a special language called a data-definition language (DDL). The result of compilation of DDL statements is a set of tables that is stored in a special file called data dictionary, or data directory.(c) The structured query language (SQL) is the most widely used and standard query language for relational database management systems. It is a kind of non-procedural language.(d) An entity is a “thing” or “object” in the real world that is distinguishable from other objects. For example, each person is an entity, and bank accounts can be considered to be entities. Entities are described in a database by a set of attributes.(e) Data warehouse is one of the newest and hottest buzzwords and concepts in the IT field and the business environment. A data warehouse is a logical collection of information——gathered from many different operational databases——that supports business analysis activities and decision-making tasks.Unit 8Animation is the term used to describe a series of graphical images that are displayed one after the other to simulate movement. Cartoons on television are one example of animation.Video differs from animation in that it usually begins as a continuous stream of visual information that is broken into separate images or frames when the video is recorded. When the frames are projected—typically at a rate of 30 frames per second—the effect is a smooth reconstruction of the original continuous stream of information. As you might imagine, at 30 frames per second, the amount of data involved in displaying a video during a multimedia presentation can require a substantial amount of storage space. Consequently, video data—like audio data—is often compressed. A variety of compression standards exist. Some of the most common video file formats are .avi, .mpeg, .mov, .rm.For multimedia presentation, video may be recorded using a standard (analog) video camera and then converted to digital form as it is input into a computer. Alternatively, the film can be recording digitally using a digital video camera. Streaming video is frequently used on Web pages to reduce file size. Similar to streaming audio, Streaming video files can begin playing once a portion of the video has been downloaded.Unit 9(a) AI is currently being applied in business in the form of knowledge systems, which use human knowledge to solve problems. The most popular type of knowledge-based system is the expert system. An expert system is a computer program that attempts to represent the knowledge of human experts in the form of heuristics. The term heuristic is derived from the same Greek root as the word eureka, which means “to discover”.(b) The user interface enables the manager to enter instructions and information into the expert system and to receive information from it. The instructions specify the parameters that guide the expert system through its reasoning processing. The information is in the form of values assigned to certain variables.(c) The knowledge base contains both facts that describe the problem area and knowledge representation techniques that describe how the facts fit together in a logical manner. The term problem domain is used to describe the problem area.(d) An expert system, also called a knowledge-based system, is an artificial intelligence system that applies reasoning capabilities to reach a conclusion. Expert systems are excellent for diagnostic and prescriptive problems.(e) The DSS is not intended to replace the manager. The computer can be applied to the structured portion of the problem, but the manager is responsible for the unstructured portion——applying judgment or intuition and conducting analyses.Unit 10The linked list (see figure 1) consists of a series of nodes, which are not necessarily adjacent in memory. Each node contains the element and a link to a node containing its successor. We call this the next link. The last cell’s next link references null.To execute printList or find(x) we merely start at the first node in the list and then traverse the list by following the next links. This operation is clearly linear-time, as in the array implementation, although the constant is likely to be larger than if an array implementation were used. The findKth operation is no longer quite as efficient as an array implementation; findKth(i) takes O(i) time and works by traversing down the list in the obvious manner. In practice, this bound is pessimistic, because frequently the calls to findKth are in sorted order (by i). As an example, findKth(2), findKth(3), findKth(4), and findKth(6) can all be executed in one scan down the list.The remove method can be executed in one next reference change. Figure 2 shows the result of deleting the second element in the original list.The insert method requires obtaining a new node from the system by using a new call and then executing two reference maneuvers. The general idea is shown in figure 3. The dashed line represents the old next reference.Unit 11(a) A set is pure if all of its members are sets, all members of its members are sets, and so on. For example, the set containing only the empty set is a nonempty pure set.(b) A language is a describable set of finite strings, drawn from a fixed alphabet. A grammar is one way to "describe" the language. The grammar consists of a finite list of rules, where each rule replaces one substring with another. The string on the left must contain at least one nonterminal. The first string "produces" or "generates" the second. Thus a rule is also called a production.(c) A finite-state machine (FSM) or finite-state automaton（FA）is a mathematical abstraction sometimes used to design digital logic or computer programs. It is a behavior model composed of a finite number of states, transitions between those states, and actions, similar to a flow graph in which one can inspect the way logic runs when certain conditions are met.(d) Sometimes it is inconvenient or impossible to describe a set by listing all of its elements. Another useful way to define a set is by specifying a property that the elements of the set have in common. The notation P(x) is used to denote a sentence or statementP concerning the variable object x. The set defined by P(x) written {x | P(x)}, is just a collection of all the objects for which P is true.Unit 12(a) Because drawings are typically displayed in 3D, CAD is especially helpful in designing automobiles, aircraft, ships, buildings, electrical circuits (including computer chips), and even clothing.(b) Computer-integrated manufacturing (CIM) is the manufacturing approach of using computers to control the entire production process. This integration allows individual processes to exchange information with each other and initiate actions. Through the integration of computers, manufacturing can be faster and less error-prone, although the main advantage is the ability to create automated manufacturing processes.(c) In addition to supporting decision making, coordination, and control, information system may also help managers and workers analyze problems, visualize complex subjects, and create new products.(d) Knowing the history and evolution of ERP is essential to understanding its current application and its future developments.(e) In addition to monitoring operational activities such as tracking the status of orders and inventory levels, enterprise system also improve organization-wide reporting and decision making.Unit 13(a) There are a wide variety of educational application programs available. Educational software is designed to teach one or more skills, such as reading, math, spelling, a foreign language, world geography, or to help prepare for standardized tests.(b) Electronic business (e-business) is the use of information technology and electronic communication networks to exchange business information and conduct transactions in electronic, paperless form.(c) Word processing software allows you to use computers to create, edit, store, and print documents. You can easily insert, delete, and move words, sentences, and paragraphs——without ever using an eraser.(d) What is a spreadsheet? Spreadsheet software takes its name from the accountant’s columnar worksheet, which it imitates. A spreadsheet is a worksheet consisting of a collection of cells formed by the intersection of rows and columns. Each cell can store one piece of information: a number, word or phrase, or formula.Unit 14(a) A geographic information system (GIS) is a system that captures, stores, analyzes, manages and presents data with reference to geographic location data. In the simplest terms, GIS is the merging of cartography, statistical analysis and database technology.(b) The GPS receiver uses the messages it receives to determine the transit time of each message and computes the distance to each satellite. These distances along with the satellites' locations are used to compute the position of the receiver. This position is then displayed, perhaps with a moving map display or latitude and longitude; elevation information may be included.(c) Virtual reality (VR) is a term that applies to computer-simulated environments that can simulate physical presence in the real world. Most current virtual reality environments are primarily visual experiences, displayed either on a computer screen or through special stereoscopic displays, but some simulations include additional sensory information, such as sound through speakers or headphones.Unit 15(a) The software development process is sometimes called the software development life cycle (SDLC), because it describes the life of a software product from its conception to its implementation, delivery, use, and maintenance.(b) How can the CMM help your organization? There are three key roles the CMM plays. First, the CMM helps build an understanding of software process by describing the practices that contribute to a level of process maturity. The second role of the CMM is to provide a consistent basis for conducting appraisals of software processes. The CMM’s third key role is to serve as a blueprint for software process improvement.(c) The UML offers a standard way to write a system’s blueprints, including conceptual things such as business processes and system functions as well as concrete things such as programming language statements, database schemas, and reusable software components. The UML represents a collection of the best engineering practices that have proven successful in the modeling of large and complex systems.(d) Object modeling is a technique for identifying objects within the system environment and the relationships between those objects. The object-oriented approach to system development is based on several concepts, such as object, attribute, behavior, encapsulation, class, inheritance, polymorphism, persistence, etc.Unit 16“Security” is an all-encompassing term that describes all the concepts, techniques, and technologies to protect information from unauthorized access. There are several requirements for information security.Confidentiality: hiding data, usually with encryption, to prevent unauthorized viewing and access.Authenticity: the ability to know that the person or system you are communicating with is who or what you think it is.Access control: once a person or system has been authenticated, their ability to access data and use systems is determined by access controls.Data integrity: providing assurance that an information system or data is genuine.Availability: making sure that information is available to users in a secure way.To prevent unauthorized access, some type of identification procedure must be used. These vary from passwords to physical access object (access cards, etc.) to biometric devices that verify some type of personal characteristic, such as a fingerprint.Some of the most secure access control systems address both identification and authentication. Identification involves verifying that the person’s name or other identifying feature is listed as an authorized user; authentication refers to determining whether or not the person is actually who he or she claims to be.Unit 17A distributed system is a collection of independent computers which appear to the users of system as a single computer. Nearly all large software systems are distributed. For example, enterprise-wide business systems must support multiple users running common applications across different sites.A distributed system encompasses a variety of applications, their underlying support software, the hardware they run on, and the communication links connecting the distributed hardware. The largest and best-known distributed system is the set of computers, software, and services comprising the World Wide Web, which is so pervasive that it coexists with and connects to most other existing distributed systems. The most common distributed systems are networked client/server systems. Distributed systems share the general properties described below.●Multiple nodes●Message passing or communication●Resource sharing●Decentralized control●Concurrency or parallelism●Fault tolerance●Heterogeneity●OpennessDistributed systems have many inherent advantages, especially over centralized systems. Some applications are inherent distributed as well. In general, distributed systems:●Yield higher performance●Allow incremental growth●Allow one user to run a program on many different machines in parallel ●Provide higher reliability● .●●。

计算机英语姜同强第四版答案

计算机英语姜同强第四版答案1、—______ Tom play the piano?—Yes, very well. （）[单选题] *A. Can(正确答案)B. MayC. MustD. Should2、22．______ is convenient to travel between Pudong and Puxi now. [单选题] * A．It(正确答案)B．ThisC．ThatD．What3、Grandfather lives with us. We all _______ him when he gets ill. [单选题] *A. look after(正确答案)B. look atC. look forD. look like4、There are sixty _______ in an hour. [单选题] *A. hoursB. daysC. minutes(正确答案)D. seconds5、8．—Will she have a picnic next week?—________. And she is ready. [单选题] * A．Yes, she doesB．No, she doesn'tC．Yes, she will(正确答案)D．No, she won't6、My father?is _______ flowers. [单选题] *A. busy watering(正确答案)B. busy waterC. busy with wateringD. busy with water7、I didn't hear _____ because there was too much noise where I was sitting. [单选题] *A. what did he sayB. what he had said(正确答案)C. what he was sayingD. what to say8、Mr. Bliss became the first person to die in a car accident. [单选题] *A. 事故(正确答案)B. 竞赛C. 检阅D. 交易9、______ in the library. （）[单选题] *A. Don’t smokingB. No smokeC. No smoking(正确答案)D. Doesn’t smoke10、（)late for the meeting again, Jack! 一Sorry, I won t. [单选题] *A.Don’tB. Be notC.Don't be(正确答案)D.Not be11、53．On your way home, you can buy some fruit, meat, vegetables and ________. [单选题] * A．something else(正确答案)B．else somethingC．everything elseD．else everything12、Mum, this T-shirt is much too small for me. Would you buy me a _______ one? [单选题] *A. niceB. largeC. nicerD. larger(正确答案)13、My sister _______ listen to music when she was doing her homework．[单选题] *A. used to(正确答案)B. use toC. is used toD. uses to14、He couldn’t ______ the maths problem without your help. [单选题] *A. work out(正确答案)B. work atC. work forD. work with15、12．That is a good way ________ him ________ English. [单选题] *A．to help；forB．helps；withC．to help；with(正确答案)D．helping；in16、—Excuse me, how long does it ______ to walk to the library? —About 15 minutes, I’m afraid.（）[单选题] *A. take(正确答案)B. spendC. costD. pay17、43．How much did you ________ the man for the TV? [单选题] *A．pay(正确答案)B．takeC．spendD．buy18、—Why do you look so ______?—Our team won the basketball match!（）[单选题] *A. angryB. excited(正确答案)C. nervousD. unfair19、Mary _____ be in Paris. I saw her just now on campus. [单选题] *A. mustn'tB. can't(正确答案)C. need notD. may not20、—What ______ your sister ______ this Saturday?—Something special, because it’s her birthday. （）[单选题] *A. are; going to doB. is; going to do(正确答案)C. does; doD. did do21、I paint a lot of pictures. [单选题] *A. 评论B. 注意C. 悬挂D. 画(正确答案)22、Mr. White likes to live in a _______ place. [单选题] *A. quiteB. quiet(正确答案)C. quickD. quietly23、82．—Is there a bookshop near here?—Yes. Walk ________ the road for five minutes and you'll see one near a big tree. [单选题] *A．toB．along(正确答案)C．ofD．about24、41．—________ do you take?—Small, please. [单选题] *A．What size(正确答案)B．What colourC．How manyD．How much25、This year our school is _____ than it was last year. [单选题] *A. much more beautiful(正确答案)B. much beautifulC. the most beautifulD. beautiful26、_______ after dinner is good for our health. [单选题] *A. WalksB. Walking(正确答案)C. WalkedD. Walk27、There ______ a football match and a concert this weekend.（）[单选题] *A. isB. haveC. will be(正确答案)D. will have28、_____from far away, the 600-meter tower is stretching into the sky. [单选题] *A. SeeB. SeeingC. To seeD. Seen(正确答案)29、In winter, animals have a hard time_____anything to eat. [单选题] *A.to findB.finding(正确答案)C.foundD.to finding30、If it _______ tomorrow, I won’t go there. [单选题] *A. rains(正确答案)B. is rainingC. will rainD. would rain。

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《计算机英语（第4版）》练习参考答案Unit One: Computer and Computer ScienceUnit One/Section AI.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; chipII.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 substrate 硅衬底10. vacuum tube 真空管11. 数据的存储与处理the storage and handling of data12. 超大规模集成电路very large-scale integrated circuit13. 中央处理器central processing unit14. 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operating instructions20. 输入设备input deviceIII.Fill in each of the blanks with one of the words given in the following list, making changes if necessary:We can define a computer as a device that accepts input, processes data, stores data, and produces output. According to the mode of processing, computers are either analog or digital.They can also be classified as mainframes, minicomputers, workstations, or microcomputers.All else (for example, the age of the machine) being equal, this categorization provides some indication of th e computer’s speed, size, cost, and abilities.Ever since the advent of computers, there have been constant changes. First-generation computers of historic significance, such as UNIVAC(通用自动计算机), introduced in the early 1950s, were based onvacuum tubes. Second-generation computers, appearing in the early 1960s, were those in which transistors replaced vacuum tubes. In third-generation computers, dating from the 1960s,integrated circuits replaced transistors. In fourth-generation computers such as microcomputers, which first appeared in the mid-1970s, large-scale integration enabled thousands of circuitsto be incorporated on one chip. Fifth-generation computers are expected to combine very-large-scale integration with sophisticated approaches to 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. microprocessorII.Translate the following terms or phrases from English into Chinese and vice versa:1. artificial neural network 人工神经网络2. computer 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 structure9. 存储和检索信息store and retrieve information10. 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; convergenceII.Translate the following terms or phrases from English into Chinese and vice versa:1. Web page （万维）网页2. touch screen 触摸屏，触屏3. blade server刀片服务器4. removable storage device 移动（式）存储设备5. 声卡soundcard6. 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; output; storage2. Basic Input/Output System3. flatbed; hand-held4. LCD-based5. dot-matrix; inkjet6. disk; memory7. volatile8. serial; parallelII.Translate the following terms or phrases from English into Chinese and vice versa:1. function key 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. address bus地址总线5. flatbed scanner 平板扫描仪6. dot-matrix printer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volatile 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, making changes if necessary:CD-ROM stands for compact disc read-only memory. Unlike floppy and hard disks, which use magnetic charges to represent 1s and 0s, optical discs use reflected light. On a CD-ROM disc, 1s and 0s 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 of light on these areas. The amount of reflected light determines whether the area represents a 1 or 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 have access only to the data imprinted(压印) by the publisher.A single CD-ROM disc can store 650 megabyte s (兆字节) of data. That is equivalent to451 floppy disks. With that much information on a single disc, the time to retrieve or access the information is very important. An important characteristic of CD-ROM drives is their access rate.IV. Translate the following passage from English 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。

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