计算机专业英语第二单元习题答案.doc

Unit 2
Computer Architecture
Section A
I．Fill in the blanks with the information given in the text:
1． input; output; storage
2． Basic Input Output System
3． flatbed scanners; hand-held scanners
4． LCD-based
5． dot-matrix printers; inkjet printers
6． disk drives; memory
7． Volatile
8． serial; parallel

II．Translate the following terms or phrases from English into Chinese and vice versa:
1． information retrieval 信息检索
2． voice recognition module 语音识别模块
3． touch-sensitive region 触感区
4． address bus 地址总线
5． flatbed scanner 平板扫描仪
6． dot-matrix printer 点阵打印机
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． operating system 操作系统
12． LCD (liquid crystal display) 液晶显示（器）
13． inkjet printer 喷墨打印机
14． data bus 数据总线
15． serial connection 串行连接
16． volatile memory 易失性存储器
17． laser printer 激光打印机
18． disk drive 磁盘驱动器
19． BIOS (Basic Input Output System) 基本输入输出系统
20． video display 视频显示器

III．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 disk read-only memory. Unlike floppy and hard disks, which use magnetic charges to represent 1s and 0s, optical disks use reflected light. On a CD-ROM disk, 1s and 0s are represented by flat areas and bumpy areas (called “pits”) on its bottom surface. The CD-ROM disk 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 by the publisher.
A single CD-ROM disk can store 650 megabytes of data. That is equivalent to 451 floppy disks. With that much information on a single disk, the time to retrieve or access the information is very important. An important characteristic of CD-ROM drives is their access rate.

Section B
I．Fill in the blanks with the information given in the text:
1． low-speed
2． topology; hub
3． control; bulk
4． token; handshake

II．Translate the following terms or phrases from English into Chinese and vice versa:
1． ISA slot ISA总线槽
2． configuration register 配置寄存器
3． still camera 静物照相机
4． token packet 令牌包
5． expansion hub 扩展集线器
6． USB（Universal Serial Bus）通用串行总线
7． root hub 根集线器
8． I/O device 输入输出设备
9． control frame 控制帧
10． PCI (Peripheral Component Interconnect) 外部设备互连

Section C
I．Fill in the blanks with the information given in the text:
1． higher; cheaper; shelf space
2． single-layer; double-sided; politics
3． Substrate
4． incompatibility

II．Translate the following terms or phrases from English into Chinese and vice versa:
1． video tape 录像带
2． aspect ratio （电视、电影图像的）高宽比，纵横比
3． CD-RW 可擦写光驱
4． laser diode 激光二极管
5． reflective layer反射层
6． optical disk光盘
7． high resolution高分辨率
8． floppy disk 软盘