计算机专业英语教程(第四版)习题答案-USB迷|专注于互联网分享

2024年1月12日发(作者：矫婉容)

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; memory

3. central processing unit 4. internal; primary; memory

5. 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. H

B. 1. user 2. monitor 3. data 4. keyboard 5. data processing

6. information 7. computer 8. memory

[Ex 4] 1. input device 2. screen, screen 3. manipulates 4. instructions 5. retrieve

6. code 7. hard copy 8. 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。它们的问世意味着IT技术领域开始了一个新时代，标志着云技术距离我们越来越近。

这些处理器主要是为服务器、数字处理中心和超级计算机设计的。这种处理器的出现并非偶然。根据英特尔公司俄罗斯和其他独联体地区负责人Dmitri Konash就此事发表的看法，IT技术市场的发展速度极快，根据预测，到2015年与英特网连接的设施将有150亿，用户超过30亿。

[Ex 6] 1. T 2. T 3. F 4. F 5. T 6. F 7. T 8. F

Unit 2

[Ex 1] 1. T 2. F 3. T 4. F 5. T 6. T 7. T 8. F

[Ex 2] 1. sizes, shapes, processing capabilities

2. supercomputers, mainframe computers, minicomputers, microcomputers

3. mainframe computer 4. microcomputers, storage locations

5. protables, laptop computers/notebook/palm-sized computer.

desktop workstations

6. semiconductor 7. CPU, memory, storage, devices, processing, users

8. microprocessor chip

[Ex 3] A. 1. C 2. A 3. H 4. I 5. E 6. F 7. G 8. B

B. 1. capacity 2. device 3. laptop computer 4. Portable computers

5. Silicon 6. semiconductor 7. workstation 8. voltage

9. RAM 10. ROM

[Ex 4] 1. portable 2. access 3. main memory 4. sophisiticated programs

5. processing capability 6. instructions 7. computation

8. computer professional

[Ex 5] 平板电脑

Tablet Computer

A tablet computer, or simply tablet, is a one-piece, mobile version of a personal computer,

primarily operated by touchscreen (the user's finger essentially functions as the mouse and cursor,

removing the need for the physical [i.e., mouse & keyboard] hardware components necessary for a

desktop or laptop computer; and, an onscreen, hideable virtual keyboard is integrated into the

display). Available in a variety of sizes, even the smallest's touchscreens are much larger than

those of a smart phone or personal digital assistant. A tablet computer may be connected to a

keyboard with a wireless link or a USB port. Convertible notebook computers have an integrated

keyboard that can be hidden by a swivel joint or slide joint, exposing only the screen for touch

operation. Hybrids have a detachable keyboard so that the touch screen can be used as a

stand-alone tablet. Booklets include dual-touchscreens, and can be used as a notebook by

displaying a virtual keyboard in one of them.

Notes:

cursor [ˈkə:sə] n. 光标 swivel [ˈswivəl] n. 旋轴；旋转接头

detachable [diˈtætʃəbl] adj. 可拆开的 stand-alone adj. 独立运行的

hybrids= hybrid computer混合计算机 booklet [ˈbuklit] n. 笔记本式平板电脑

平板电脑，也叫平板，是个人计算机的一款，可移动，是一个整体。平板电脑主要依靠触屏操作（用户的手指发挥了鼠标和光标的作用，替代了台式和膝上电脑必须的物理硬件[即鼠标和键盘]。还有一个与显示器整合的可隐藏的屏幕虚拟键盘）。平板电脑型号多种，即使是最小的触屏也比智能手机或个人数字助理的屏幕大多了。可以用无线连接或USB插口给平板电脑连接一个键盘。可旋转笔记本电脑可以通过一个旋转铰链或一个滑动铰链把集成的键盘隐藏起来，仅仅在需要触摸时显示。混合型计算机配有一个可拆分的键盘，这样触屏可以当作一个单独的平板电脑使用。笔记本平板电脑包括两个触屏，在其中一个触屏上显示虚拟键盘就可以作为笔记本使用。

[Ex 6] 1. T 2. T 3. T 4. F 5. F 6. T 7. F 8. T 9. F 10. T 11. F 12. T

13. T 14. T

Unit 3

[Ex 1] 1. T 2. F 3. T 4. T 5. T 6. T 7. F 8. F 9. T 10. F 11. T 12. F

13. F 14. T 15. F

[Ex 2] 1. microprocessor 2. bus 3. register 4. control unit 5. processor

6. binary 7. arithmetic, logical 8. milliseconds, microseconds, nanoseconds.

9. instruction 10. execution 11. megahertz 12. wordsize

[Ex 3] A. 1. F 2. A 3. J 4. C 5. D 6. E 7. H 8. I 9. B 10. G

B. 1. Storage 2. chip 3. registers 4. ALU 5. bus 6. control unit

7. machine language 8. binary system 9. bits 10. computer program

[Ex 4] 1. configuration 2. converts 3. data buses 4. characters

5. decodes 6. synchronize 7. circuitry 8. internal clock

[Ex. 5]

Bus Systems Supporting Multiple Peripherals

As the number of potential peripherals grew, using an expansion card for every peripheral

became increasingly impossible. This has led to the introduction of bus systems designed

specifically to support multiple peripherals. Common examples are the SATA ports in modern

computers, which allow a number of hard drives to be connected without the need for a card.

However, these high-performance systems are generally too expensive to implement in low-end

devices, like a mouse. This has led to the parallel development of a number of low-performance

bus systems for these solutions, the most common example being Universal Serial Bus. All such

examples may be referred to as peripheral buses, although this terminology is not universal.

Notes:

1. Serial ATA (SATA) is a computer bus interface for connecting host bus adapters to mass storage

devices such as hard disk drives and optical drives.

2. Universal Serial Bus USB

支持多种外接设备的总线系统

随着外接设备数量的不断增加，想用扩展卡来应付每一种外围设备越来越不现实了，这就产生了设计专门支持多种外接设备的总线系统。通常的例子就是现代计算机上的SATA接口，这就允许很多硬盘驱动器不需要卡就可以同计算机连接起来。但是把这些高性能系统用于低端设备，如鼠标等就很不合算。这就导致同时开发很多低性能的总线系统解决方案，最常见的例子就是UBS接口。所有这些例子都可以称作外接设备总线，尽管这个术语还没有普遍通用。

[Ex 6] 1. T 2. F 3. F 4. T 5. T 6. F 7. T 8. T 9. T 10 F

Unit 4

[Ex 1] 1. F 2. T 3. T 4. T 5. F 6. T 7. F 8. T 9. T 10. T 11. F 12. T

13. F 14. T 15. T 16. F 17. F 18. T 19. F 20. T 21. F 22. T

23. F 24. T 25. F

[Ex 2] 1. main memory 2. RAM 3. diskettes/floppy disks; hard disks

4. chips 5. parity 6. expanded, extended 7. monochrome

8. cache 9. ROM 10. updated

[Ex 3] A. 1. B 2. E 3. C 4. J 5. I 6. H 7. A 8. F 9. G 10 D

B. 1. secondary storage 2. buffer 3. access 4. code 5. diskette

6. slots 7. terminals 8. motherboard 9. bytes 10. screen

[Ex 4] 1. desktop 2. software 3. animation 4. transferred 5. sophisticated

6. compatible 7. cache 8. upgrade

[Ex 5]

USB flash drive

A USB flash drive is a data storage device that includes flash memory with an integrated

Universal Serial Bus (USB) interface. USB flash drives are typically removable and rewritable,

and physically much smaller than a floppy disk. Most weigh less than 30 g. As of September 2011,

drives of up to 256 gigabytes (GB) are available. Storage capacities as large as 2 terabytes are

planned, with steady improvements in size and price per capacity expected. Some allow up to

100,000 write/erase cycles, depending on the exact type of memory chip used, and a 10 year shelf

storage time.

USB flash drives are often used for the same purposes for which floppy disks or CD-ROMs

were used, i.e., for storage, back-up and transfer of computer files. They are smaller, faster, have

thousands of times more capacity, and are more durable and reliable because they have no moving

parts. Until about 2005, most desktop and laptop computers were supplied with floppy disk drives,

but floppy disk drives have been abandoned in favor of USB ports.

Notes

GB: gigabyte 吉字节 109 字节； terabyte TB 太字节，1012 字节

USB闪驱

USB闪驱是一种数据存储设备，它包含带有一个集成的通用串行总线（USB）接口。USB闪驱通常可以移动并可以重写，其尺寸要比软盘小得多，大多数的重量不到30克。从2011年9月始，市场就出现256 GB的U盘。2太字节的U盘在筹划之中，估计U盘大小会更加合理，价格也更合适。有的U盘允许写/擦10万个循环，这取决于存储芯片的型号，储存寿命可以达到10年时间。

USB闪驱与软盘或CD-ROM的目的相同，就是为了计算机文件的存储、备份和转移。因为它们没有移动部件，所以体积更小，速度更快，拥有数千倍的容量，更加持久可靠。到2005年，大部分台式和膝上电脑还都配备软驱，但是软驱因为USB插口而被淘汰。

[Ex. 6] 1. T 2. F 3. F 4. T 5. T 6. T 7. T 8. F 9. F 10. F 11. T 12. T 13. T

14. F 15. T 16. F 17. T 18. T 19. F 20. T 21. T 22. T

Unit 5

[Ex 1] 1. T 2. T 3. F 4. T 5. F 6. F 7. F 8. T 9. T 10. T 11. F 12. T 13. F

14. F 15. T 16. T 17. F 18. T 19. F 20. F 21. T 22. T 23. T

[Ex 2] 1. mail, courier 2. hub, star 3. Local Area Network 4. packets 5. Ethernet

6. kilobits per second, megabits per second, gigabits per second 7. circuit

switching 8. reassembled 9. Internet Protocol, Transmission Control Protocol

10. datagram 11. frames 12. binary, decimal

[Ex 3] A. 1. C 2. E 3. B 4. F 5. A 6. D 7. H 8. G

B. 1. hub 2. zipped 3. decimal 4. frame

5. binary number 6. Internet 7. packet 8. bandwidth

[Ex 4] 1. forwarded 2. reassembled 3. are encapsulated 4. cables 5. bursty

6. submit 7. are retransmitted 8. protocol

[Ex 5]

1. E 2. A 3. C 4. F 5. B 6. D 7. H 8. G

[Ex 6]

1. 有意为技术服务人员留下的

2. 抛弃、丢失或毁灭的数据都进入到数据接受器中

3. 远远不能覆盖绝大多数嫌疑人

4. 真正奇才所掌握的技术

5. 文件和程序

6. 1. 系统详情、扩展其性能 5. 敏感信息的人

7. 滞缓的特性和控制开发的复杂性

8. 非常巧妙的权宜之计，旨在解决很棘手的问题

9. 不能有效与他人沟通的人

10. 一个程序、数据结构或全部程序的

11. 交叉指向不合适的新闻组

12. 打免费长途电话了；通信网络，但不单指通信网络

13. 眼睛疲劳

14. 无关紧要或令人讨厌的琐碎问题

15. 不会有人发现这些漏洞的，或发现了也不会利用

16. 受人雇佣，为测试系统的安全性而攻入某个地方

17. 那种使用许多GOTO、例外或另外的“非结构的”分支构造

18. 不能定期运行适当的抑制程序

19. 某种非常友好程序的

20. 远在没有正式发行之前

21. 该技术也许不能发挥作用。如果不能用，程序员也永远不知道为什么

22. Suns 机上使用L1-A；某些Mac机使用!

23. 完全丧失功能了；计算机想做某事但不能进行下去了

24. 人的神经系统，与计算机的硬件或软件相对；系统的硬件或软件

25. 那种在紧急状况下能迅速发现并解决问题

26. 思想排外/思想保守

Unit 6

[Ex 1] 1. F 2. T 3. F 4. T 5. T 6. F 7. F 8. T 9. T 10. F 11. F 12. F

13. T 14. F

[Ex 2] 1. compatible 2. hardcopy 3. terminal, monitor 4. inked ribbon

5. line 6. Thermal 7. Monochrome 8. liquid crystal display

[Ex 3] A. 1. G 2. B 3. I 4. F 5. D 6. H 7. C 8. E 9. J 10. A

B. 1. printers 2. hard copy 3. CRT 4. hardware 5. pixel

6. output 7. software 8. Line printers 9. plotters 10. graphics

[Ex 4] 1. are attached 2. compatible 3. flexible 4. mechanism 5. perform

6. rotate 7. transfer 8. video

[Ex 5]

Electroluminescent Display（电致发光显示器）

A type of flat-panel display（平板显示）that uses the property of electroluminescence, whereby

a phosphor will emit photons of radiation（光子辐射）when placed in an electric field（电场）. The

phosphor is incorporated in a thin coating on the screen; an additional coating can produce full color.

Electroluminescent screens are used in some large-screen displays, such as airport announcement

boards. Nowadays electroluminescent screens are mainly used for small displays in control panels

and domestic equipment.

电致发光显示器

这是一种平板显示器。把荧光粉放置在电场之中就能发射光子辐射，这就是平板显示器使用的电致发光性能。屏幕上有薄薄的荧光粉涂层，这个添加涂层能产生全彩。电致发光屏幕用于某些巨大的显示屏上，例如机场通告板。如今电致显示屏主要用于控制板和家庭设施的小型显示器上。

[Ex. 6] 1. T 2. F 3. T 4. F 5. T 6. F 7. F 8. T 9. F 10. T 11. F 12. T 13. F

14. T 15. F 16. T 17. T 18. T 19. T 20. F 21. T 22. F 23. T 24. T

25. T

Unit 7

[Ex 1] 1. T 2. F 3. T 4. T 5. F 6. F 7. T 8. T 9. F 10. F 11. F 12. T

13. F 14.T 15. T 16. F 17. T 18. T 19. F 20. F

[Ex 2] 1. printers, plotters 2. graphics 3. pins 4. pages per minute 5. dots per inch

6. lines per minute 7. non-impact 8. carbon

[Ex 3] A. 1. D 2. F 3. B 4. A 5. G 6. E 7. C 8. H

B. 1. print wheel 2. Microcomputers 3. ink jet printer 4. network

5. noise 6. output device 7. desktop publishing 8. dot-matrix printers

[Ex 4] 1. installations 2. categorized 3. image 4. ribbon 5. monochrome

6. physical 7. referred to 8. dot

[Ex 5]

Digital Technology of Copy Machine

There is an increasing trend for new photocopiers to adopt digital technology, thus replacing

the older analog technology. With digital copying, the copier effectively consists of an integrated

scanner and laser printer. This design has several advantages, such as automatic image quality

enhancement and the ability to "build jobs" (that is, to scan page images independently of the

process of printing them). Some digital copiers can function as high-speed scanners; such models

typically offer the ability to send documents via email or to make them available on file servers.

A great advantage of digital copier technology is "automatic digital collation." For example,

when copying a set of 20 pages 20 times, a digital copier scans each page only once, then uses the

stored information to produce 20 sets. In an analog copier, either each page is scanned 20 times (a

total of 400 scans), making one set at a time, or 20 separate output trays are used for the 20 sets.

Notes:

scanner 扫描仪 collation [kəˈleiʃ(ə)n] n. 校勘，核对 tray 托盘，文件盘

复印机的数字技术

新的复印机越来越趋向于采用数字技术替代老的模拟技术。数字复印机有效地把扫描仪和激光打印机整合在一起，这种设计拥有数个优势，譬如自动图形质量提高，自动工作的能

力（扫描和打印互不干涉）。有些数字复印机如同一个高速扫描仪，这样的型号通常具有通过email发送文件的能力，或者给文件服务器提供文件。

数字复印机的最大优点在于它可以“自动数字校验”。例如当要复印20页，每页复印20份的时候，数字复印机只需每一页扫描一次，然后使用储存的信息复印20份。如果是模拟复印机，要么每一页都要扫描20次（一共要扫描400次），一次复印一份；要么每页复印20份，20页分别放在20个输出托盘中。

[Ex.6] 1. F 2. T 3. T 4. T 5. F 6. T 7. F 8. T 9. T 10. F 11. T 12. T 13. F

14. F 15. T 16. F 17. T 18. F 19. T 20. T 21. T 22. F 23. T 24. T

Unit 8

[Ex 1] 1. T 2. F 3. T 4. T 5. F 6. T 7. F 8. F 9. F 10. T 11. F 12. T 13. T

14. F 15. T 16. T 17. F 18. T 19. T 20 F 21. F 22. T 23. T 24. F

[Ex 2] 1. Local area networks, wide area networks 2. client-server 3. bus 4. protocol

5. hardware 6. microwaves 7. adapter, router 8. stack 9. upper, lower 10.

layered

[Ex 3] A. 1. D 2. E 3. F 4. H 5. A 6. G 7. B 8. C

B. 1. C. server 2. r 3. D. topology 4. G. microwave

5. A. local 6. H. inception 7. B. wide 8. F. Wireless

[Ex 4] 1. layout 2. accommodate 3. conforms 4. address 5. interoperable

6. session 7. has been designated/was designated等 8. configuring

[Ex 5] 1. H 2. A 3. F(transmits) 4. C 5. D 6. E 7. B 8. G

[Ex 6]1. T 2. T 3. F 4. T 5. F 6. F 7. T 8. T 9. T 10. T 11. T 12. F 13. T

14. T 15. T 16. F 17. F 18. T 19. F 20. T 21. T 22. T 23. T 24. F 25.

T 26. T 27. T 28. F 29. F 30. F 31. T 32. T 33. F 34. T 35. T 36. F

37. T 38. F 39. F 40. F 41. T 42. T 43. T 44. F

Unit 9

[Ex 1] 1. T 2. T 3. F 4. T 5. F 6. F 7. T 8. T 9. T 10. F 11. T 12. F

13. T 14. F 15. T 16. T 17. T 18. F

[Ex 2] 1. channels 2. eletrical pulses or charges, eletromagnetic waves, pulse of light

3. telephone lines, coaxial cables, microwave systems, satellites systems, fiber optic

cables 4. telephone lines 5. networks 6. atmosphere 7. microwave tower

8. gigahertz 9. digital 10. light

[Ex 3] A. 1. B 2. D 3. F 4. G 5. A 6. C 7. E 8. H

B. 1. noise 2. transmission 3. Fiber optics 4. Microwave 5. sychronous

6. optical media 7. Coaxial cable 8. digits

[Ex 4] 1. communicate 2. revolves 3. detect 4. encrypted 5. nonconductive

6. frequency 7. susceptible 8. relayed 9. antenna 10. Pulses

[Ex 5]

Smartphone

To really understand what a smartphone is (and is not), we should start with a history lesson.

In the beginning, there were cell phones and personal digital assistants (or PDAs). Cell phones

were used for making calls--and not much else--while PDAs, like the Palm Pilot, were used as

personal, portable organizers. A PDA could store your contact info and a to-do list, and could sync

with your computer.

Eventually, PDAs gained wireless connectivity and were able to send and receive e-mail. Cell

phones, meanwhile, gained messaging capabilities, too. PDAs then added cellular phone features,

while cell phones added more PDA-like (and even computer-like) features. The result was the

smartphone.

智能手机

要真正理解什么是智能手机，什么不是智能手机，我们应该从了解历史开始。起初人们使用手机和个人数字助理。手机只是用来打电话，而数字助理，如掌上电脑，是个人便携式的记事本。一台个人数字助理能储存你的联系信息以及将要处理的事情，可以和电脑同步。

最终，个人数字助理开始了无线连接，能够发送和接收电子邮件，而手机也具备了获取信息的能力。个人数字助理添加手机功能，手机也增添个人数字助理（甚至计算机）的特性，其结果就是智能手机。

[Ex. 6] 1. F 2. F 3. T 4. F 5. F 6. F 7. T 8. F 9. T 10. T 11. T 12. T

Unit 10

[Ex 1] 1. F 2. T 3. T 4. F 5. T 6. T 7. T 8. F 9. F 10. T 11. F 12. T

13. F 14. F 15. T 16. F 17. T 18. F 19. T 20. T

[Ex 2] 1. download, contract/infect 2. macros 3. viruses 4. timer 5. client

6. recognize 7. reformat 8. back up

[Ex 3] A. 1. B 2. E 3. F 4. A 5. C 6. G 7. D 8. H

B. 1. informative 2. programmed/is programming等 3. responsive

4. attachment 5. chat group 6. The bottom line 7. inoperabl

8. is scanned

[Ex 4] 1. has rendered 2. embedded 3. update 4. are contracted 5. wired

6. theorized 7. replicate 8. activated

[Ex 5] 1. C 2. G 3. A 4. F 5. H 6. B 7. E 8. D

[Ex 6] 1. F 2. T 3. F 4. T 5. T 6. T 7. F 8. F 9. T 10. F 11. F 12. T 13. F

14. F 15. F 16. F 17. T 18. T 19. F 20. F 21. T 22. T 23. T 24. T

25. F 26. F

Unit 11

[Ex.1] 1. T 2. T 3. F 4. F 5. T 6. T 7. F 8. T 9. T 10. T 11. F 12. F 13. F

14. T 15. T 16. T 17. T 18. T 19. F 20.F

[Ex 2] 1. HTML, the hypertext markup language 2. components 3. ASCII files

4. markup tags 5. webmaster 6. Heads, tables, paragraphs, lists 7. tags

8. slash 9. case sensitive 10. required 11. View Source

12. template 13. carriage returns, spaces, linefeeds 14. source

[Ex 3] A. 1. C 2. D 3. H 4. F 5. E 6. B 7. A 8. G

B. 1. bookmark 2. browsers 3. primer 4. HTML

5. link 6. servers 7. webmaster 8. Search Engines

[Ex. 4]

1. 用超文本标识语言创建文档 2. 为网络创建文件 3. 文档类型定义

4. 独立平台风格 5. 网络服务器 6. 局域视图模式

7. 超文本标识语言版本 8. 超文本标识语言文档 9. 纯文本文件

10. 文本编辑器 11. 文字处理软件 12. 带分行符的文本

13. 超文本编辑器 14. 超文本标识符的基本知识 15. 文字处理器

16. 使自己的文件登录上网 17. 局域网 18. 提供免费上因特网

19. 本地因特网供应商 20. 免费将文件登录服务器

21. 用超文本标识符标志文件要素 22. 左尖括号 23. 标识符名

24. 右尖括号 25. 标识符指令

26. 图片源文件超文本标识符 27. 计较大小写/键盘上下档 28. 纯骨架文档

29. 一个样式文件 30. 查看源文件

31. 带有超文本语言标识符的源文件 32. 超文本语言编码信息 33. 文件扩展名

34. 全球背景 35. 大号字或/和粗体字 36. 回车

37. 单词移行 38. 回行

[Ex 5]

What does HTML stand for?

HTML is an abbreviation of "HyperText Mark-up Language" - which is already more than

you need to know at this stage. However, for the sake of good order, let us explain in greater

detail.

•

Hyper is the opposite of linear. In the good old days - when a mouse was something the

cat chased - computer programs ran linearly: when the program had executed one action it

went to the next line and after that, the next line and so on. But HTML is different - you

can go wherever you want and whenever you want. For example, it is not necessary to

visit before you visit .

Text is self-explanatory.

Mark-up is what you do with the text. You are marking up the text the same way you do

in a text editing program with headings, bullets and bold text and so on.

Language is what HTML is. It uses many English words.

HTML代表什么？

HTML是HyperText Mark-up Language（超文本表示语言）的缩写形式，这超出现阶段你应该知道的内容。但是为了有一个好的学习的顺序，我们还是详尽解释一下为好。

Hyper与线性相反。很早的时候，老鼠是猫追逐的对象——计算机程序为线性运行：当程序执行了一个动作，就移动到下一行，然后再下一行等等。但是HTML不一样了，你可以

在任何时候到你想去的任何地方。例如你没有必要在访问前先访问网站。

Text 是自我解释性的。

Mark-up就是处理文本，就如同在文本编辑程序中做标题，添加黑圆点，加粗等一样给文本添加标识。

Language就是HTML。它使用许多英语单词。

[Ex. 6] 1.T 2. T 3. F 4. F 5. T 6. F 7. T 8. T 9. F 10. T 11. T 12. F 13. T

14. T 15. F 16. T 17. T 18. F 19. F 20. T

Unit 12

[Ex.1] 1. F 2. F 3. T 4. T 5. T 6. T 7. T 8. F 9. F 10. T 11. F 12. T 13. T

14. F 15. T 16. F 17.T 18. F 19. T 20. T

[Ex 2] 1. analog 2. relational 3. distributed 4. object-oriented

5. privileges 6. structured query language 7. columns, row

8. infancy

[Ex 3] Part A 1. C 2. E 3. F 4. G 5. A 6. H 7. B 8. D

Part B 1. query 2. database 3. interface 4. infancy 5. profile

6. tabular 7. Interactive 8. metadata

[Ex. 4]. 1. Legacy 2. interconnected 3. integrity 4. intermittent 5. converts

6. dispersed 7. reassembling 8. access

[Ex 5] 1. C 2. G 3. F 4. H 5. A 6. E 7. B 8. D

[Ex 6] 1. F 2. T 3. T 4. T 5. F 6. T 7. T 8. F 9. T 10. T 11. F 12. T 13. T

14. T 15. F 16. T 17. F 18. T 19. F 20. T 21. T 22. F 23. F 24. F 25. T 26. T

27. F 28. T 29. F 30. T 31. T 32. T 33. T 34. T 35. F 36. T

Unit 13

[Ex.1] 1. F 2. F 3. T 4. T 5. F 6. T 7. T 8. F 9. T 10. T

11. F 12. T 13. F 14. T 15. F 16. F 17. T 18. T 19. F 20. F

21. T

[Ex.2] 1. functions, structures 2. object 3. messages 4. black boxes

5. object instances 6. Arguments 7. client-server 8. code, bugs

9. specific, general 10. C++

[Ex.3] A. 1. C 2. E 3. F 4. B 5. J 6. H 7. I 8. D 9. A 10. G

B. 1. server 2. clients 3. database 4. jargon 5. programmers 6. compiler

7. Java 8. codes 9. C++ programming language 10. information hiding

[Ex.4] 1. buzzword 2. acronym 3. syntax 4. browser 5. intranet 6. Interface

7. network 8. by storm

[Ex 5] (1) feasibility (2) data (3) requirements analysis (4) system requirements

(5) requirements specification (6) management/user (7)feasible (8) Physical

Unit 14

[Ex 1] 1. F 2. T 3. F 4. T 5. F 6. T 7. F 8. T 9. T 10. F 11. T 12. T 13. F

14. F 15. F 16. T 17. T 18. F 19. F 20. T 21. T 22. F 23. T 24. F

25. F 26. T 27. T 28. F 29. T 30. T 31. T 32. T 33. F 34. T 35. T

36. F 37. F 38. F 39. F 40. T

[Ex 2] A. 1. D 2. E 3. F 4. B 5. H 6. A 7. C 8. G

B. 1. web directory 2. search engine 3. Web pages 4. Web browsers

5. meta tags 6. cached pages 7. proximity search 8. market share

[Ex 3] 1. result in 2. index 3. refine 4. customize 5. personalize 6. evolve

7. mining 8. isolates

[Ex. 4] A.

1. 网站主人使用文件给网络机器人（web robots）就自己的网站的访问权限下达指令，这就是机器人排除协议。

工作的过程如下：机器人想访问一个网站网址，譬如/，访问前它首先检查里边的，即/，发现：

User-agent:*（用户代理：*）

Disallow:/ （不准，不接受）

User-agent:*（用户代理：*）的意思是这部分可以适合所有的机器人。Disallow:/ （不准，不接受）告诉机器人，这个网站的任何网页都不允许访问。

在使用的时候有两件重要的事情必须想到：

 机器人可以忽略你的，尤其是恶意机器人，专门寻找网络的安全漏洞；还有垃圾邮件散发者使用的email地址收集器根本就不把的指令放在眼里。

 文件是公开提供的，任何人都能看到你的服务器的哪些部分你是拒绝机器人访问的。

因此不要指望文件来隐藏信息。

2. 使用And，Or和Not（布尔算子）

本页的例子讲解了布尔算子Or，And和Not（或and not）在索引、数据库和支持布尔类型搜索的搜索引擎中的使用。

想象你由于布置作业，需要找到几本有关爵士乐曲或布鲁斯音乐书籍。在集中注意爵士和布鲁斯音乐的某个方面之前，想了解这方面的一个概括，你在期刊索引中击入三个关键搜索词：

jazz OR blues（爵士或布鲁斯）

这次搜索找到的是讨论爵士或布鲁斯音乐的文章。

Or总是扩大搜索范围。

jazz AND blues（爵士和布鲁斯）

这次搜索找到的是有关爵士音乐和布鲁斯音乐比较的文章。

And 总是缩窄了搜索的结果。

jazz NOT blues （爵士不是布鲁斯）

这次搜索只有关于爵士音乐的文章。

Not总是排除指定项目的记录。

注意：在图书目录中，击入jazz AND NOT blues（爵士而不是布鲁斯）

B. 1. operated 2. using 3. add 4. including 5. categorize 6. was founded

7. was expanded 8. opening 9. violating 10. ranked

[Ex 5] 1. T 2. F 3. T 4. T 5. F 6. F 7. T 8. F 9. T 10. T 11. F 12. T 13. T

14. T 15. F 16. F 17. F 18. F 19. F 20. T 21. T 22. T 23. T 24. F

25. T 26. T 27. F 28. F 29. T 30. T 31. T 32. T 33. F 34. T 35. F

36. T 37. T 38. T 39. T 40. F 41. F 42. T 43. T 44. T

Unit 15

[EX 1] 1. F 2. T 3. T 4. F 5. F 6. T 7. T 8. T 9. T 10. T 11. F 12. F 13. F

14.F 15. T 16. F 17. T 18. F 19. F 20. T

[Ex 2] 1. information 2. variable, constant 3. integer 4. Characters

5. decimal 6. exponent 7. bit 8. byte

[Ex 3] A. 1.D 2. E 3. F 4. G 5. A 6. C 7. H 8. B

B. 1. Sidebars 2. processor 3. notation 4. Variables

5. compilers 6. constants 7. power 8. compatible

[Ex 4] 1. identify 2. recognize 3. represented 4. are preset

5. were subject 6. unsigned 7. designated 8. assigns

[Ex 5] 1. G 2. F 3. A 4. E 5. B 6. C 7. D 8. H

[Ex 6] 1. T 2. F 3. T 4. F 5. T 6. F 7. F 8. T 9. F 10. T 11. T 12. F 13. F

14. T 15. T 16. F 17. T 18. T 19. F 20. T 21. F 22. T 23. T 24. F

25. T

Unit 16

[Ex 1] 1. F 2. F 3. T 4. F 5. T 6. F 7. T 8. F 9. F 10. T 11. T 12. T 13. F

14. F 15. T 16. F 17. T 18. T

[Ex 2] Part A 1. D 2. E 3. F 4. B 5. A 6. C 7. H 8. G

Part B 1. feedback 2. brainstorming 3. advancements 4. impact

5. momentum 6. refinements 7. electronic 8. mechanism

[Ex 3] 1. has demonstrated 2. advent 3. surge 4. perform

5. debut 6. undefine 7. build on 8. simulate

[Ex 4] 1. C 2. F 3. G 4. A 5. E 6. H 7. B 8. D

[Ex 5] 1. T 2. F 3. T 4. T 5. T 6. F 7. T 8. F 9. T 10. T 11. T 12. F 13. T

14. F 15. T 16. F 17. T 18. F 19. T 20 T 21. F 22. F 23. T 24. T 25.

F 26. F 27. F 28. T 29. T 30. F 31. F 32. F 33. T 34. T 35. T 36. F

37. F 38. T 39. T 40. F 41. F 42. T