5.1存储器的分类与组成 5.2随机存取存储器（ＲＡＭ） 5.3读存储器（ＲＯＭ） 5.4存储器的连接 5.5几种新型的半导体存储器 5.6磁表面存储器 5.7光盘存储器

5-1 概述 5-2 随机存储器（RAM） 5.3 只读存储器（ROM）

1．答：特点：集成度高、速度快、功耗低、价格便宜、可靠性高、使用方便。内存 有两种：随机存取存储器 RAM，只读存储器 ROM。一般的 RAM 芯片，关闭电源后所存 信息将全部丢失。它通常用来暂存运行的程序和数据。在计算机运行期间只能读出存储的 信息而不能用通常的方法将信息写入

5-1 随机读写存储器RAM 5-2 只读存储器ROM 5-3 存储器的连接

7.1 概述 7.2 只读存储器( ROM ) 7.3 随机存储器( RAM ) 7.4 存储器容量的扩展 7.5 用存储器实现组合逻辑函数

一、EM-II型PLC介绍 .基本功能模块 1. CPU： CPM-E2、CPM-E3 2. ROM： MPM-1E（925W-EEPROM-1KW） MPM-2E（3997W-EEPROM-4KW） MPM-2R（3997W- EPROM-4KW）

在半导体硅片上集成了微处理器(CPU)，存储器 (RAM、ROM、EPROM)和各种输入、输出接口。 20世纪70年代问世。 已广泛应用在： 工业自动化控制、自动检测、智能仪器仪表、家用 电器、电力电子、机电一体化设备等方面

I think it's obvious f rom the cameras here that I didn't come to discuss the ban on cyclamates or DDT. I have a subject which I think if of great importance to the American people. Tonight I want to discuss the importance of the television news medium to the American people. No nation depends more on the intelligent judgment of its citizens. No medium has a more profound influence over public

This is the 37th time I have spoken to you f rom this office, where so many decisions have been made that shape the history of this nation. Each time I have done so to discuss with you some matter that I believe affected the national interest. In all the decisions I have made in my public life I have always tried to do what was best for the nation

Good evening, my fellow Americans. First, I should like to express my gratitude to the radio and television networks for the opportunities they have given me over the years to bring reports and messages to our nation. My special thanks go to them for the opportunity of addressing you this evening. Three days f rom now, af ter a half century in the service of our country, I shall lay down the responsibilities of of fice as, in traditional and solemn ceremony, the authority of the Presidency is vested in my successor. This evening I come to you with a message of leave-taking and farewell, and to