计算子专业英语第一章.ppt

DDR SDRAM (Double-Data-Rate SDRAM) 双倍数据传输率同步动态随机存取存储器 start up (boot up) 开动，开始工作，突然出现，出发，开办，启动 BIOS (Basic Input Output System) 基本输入/输出系统 flash memory card 闪存卡 CD-ROM (Compact Disc Read Only Memory) (只读)光盘驱动器 CD-R (Compact Disc-Recordable) 可擦写光盘 CD-RW (Compact Disk-ReWritable) 可重复读写光盘 DVD (Digital Versatile Disc) 数字通用光盘，影碟，光碟 Notes [1] ?ROM does not need power to remember its contents, so this is where a computer stores the programs that are needed to start up (boot up) the computer system. 只读存储器不需要电源就能记住存储的内容，因此常用于存储计算机系统启动时所需的一些程序。 [2] A small plastic slider can be slid to unblock a hole in the corner of the diskette to write-protect the disk (so data can’t be accidentally erased). 一个小的塑料滑动块能滑动覆盖在盘片角落的洞以写保护软盘(因此数据就不会被意外删除)。 [3] ?These small drives store data on flash memory microchips (a kind of EEPROM). Flash memory can be erased and re-written a limited number of times (typically many thousands of times). Some units have a write-protect switch. 这些小闪存在快速闪存芯片(一种电可擦除只读存储器)上存储数据。闪存可以被擦除和有限次地重写(通常为几千次)。一些闪存还有写保护开关。 Exercises Ⅰ. ?Choose the correct answer. 1. What does the letters RAM stand for? ______ a. Random Access Memory b. Read Always Memory c. Ready Always Memory d. Routine Access Memory 2. Which of these is volatile? ______ a. ROM b. RAM c. PRAM d. BIOS 3. Which type of memory holds data that does not change? ______ a. ROM b. RAM c. ASCII d. CMOS 4. ?A CD-ROM can hold approximately ______. a. ?1.44 megabytes b. ?250 gigabytes c. ?670 megabytes d. ?1.44 gigabytes 5. Which device stores data by magnetizing tiny spots on a metal disk.______ a. CD-ROM disk drive b. hard disk drive c. USB flash drive d. DVD disc drive 6. Which of these can a personal computer NOT write data on? ____ a. CD-ROM b. hard disk c. Zip disk d. CD-RW Ⅱ. ?Write True or False for the following statements according to the pass