unit 2(computer architecture).pptVIP

Unit 2 Computer Architecture Unit 2 Computer Architecture 第2单元 计算机体系结构 Section A Computer Hardware 课文A 计算机硬件 Main Points The Definition of Hardware and Software Input Hardware Output Hardware Storage Hardware Hardware Connections Text I. Introduction Computer hardware is the equipment involved in the function of a computer and consists of the components(元件) that can be physically handled. 一、引言 计算机硬件是计算机运行所需要的设备, 由可进行物理处理的元件组成。 Key Words or Phrases Please consult the notes on the left of text or the words written in red or green in the translation of the text Abbreviations CPU Central Processing Unit，中央处理器 BIOS Basic Input Output System，基本输入输出系统 Modem Modulator-demodulator，调制解调器 CRT Cathode Ray Tube，阴级射线管 LCD Liquid Crystal Display，液晶显示器 CD Compact Disc，光盘 CD-ROM Compact Disc Read-Only Memory， 光盘只读存储器 RAM Random Access Memory，随机访问存储器 ROM Read Only Memory，只读存储器 Summaries The Categories of Hardware: Input Hardware Output Hardware Storage Hardware Input Hardware: Light pen Mouse Joystick Keyboard Scanner: flatbed scanner and hand-held scanner Modem Output Hardware: Video display: CRT and LCD Printer: Dot-matrix printer, Inkjet printer, Laser printer Storage Hardware Disk drive: hard disk, floppy disk, magneto-optical disk, compact disk (外存) Memory (内存) Exercises P.9 Ⅱ Ⅲ A parallel connection is much faster than a serial connection, but it is limited to distances of less than 3 m (10 ft) between the CPU and the external device. 并行连接比串行连接快得多，但是它在中央处理器和外部设备之间的传输距离仅限于不到3米（10英尺）。 A video display, or screen, converts information generated by the computer into visual information. 视频显示器或屏幕将计算机生成的信息转换成可视信息。 分词短语作定语 Displays commonly take one of two forms: a video screen with a cathode ray tube (CRT) or a video screen with a liquid crystal display (LCD). A CRT-based screen, or monitor, looks similar to a television set. 显示器一般有两种形式：阴极射线管视频屏幕和液晶显示视频屏幕。基于阴极射线管的屏幕或监视器看起来就像一