微机保护中随机存储器RAM有什么特点，作用是什么？_爱下问搜题

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问题问答题简答题

微机保护中随机存储器RAM有什么特点，作用是什么？

答案

参考答案：

特点：读写操作方便，速度快，缺点是工作电源消失后，其原有的数据、报告信息也消失。

作用：用于存放采样数据和计算的中间结果、标志字等信息，有的也存放微机保护的动作报告。

单项选择题

一个汉字的机内码与国标码之间的差别是( )。

A．前者各字节的最高位二进制值各为1，而后者为0

B．前者各字节的最高位二进制值各为0，而后者为1

C．前者各字节的最高位二进制值各为1、0，而后者为0、1

D．前者各字节的最高位二进制值各为0、1，而后者为1、0

完形填空

After seating myself in my room and turning on my computer, I noticed a Post-it note stuck to my monitor(显示器). It read, “Don’t   36   your computer. You stayed up until midnight doing your homework last night.—Mom.” I   37  the note into the wastebasket. “Why do they   38 ?” I thought. “They’re never here anyway.”
Right after high school started, I almost   39  contact with my parents. With all their business   40 , they asked the neighbors to watch over me. Of course, the neighbors didn’t do such a(n)   41  job, as they had kids of their own to worry about. The only means of   42  between me and my parents was through Post-it notes.
After spending about eight hours away from home, I usually came home to find the house   43  empty. It made me sad. I would come home from school to be welcomed by   44 , to talk to no one and to be watched over by my neighbors. That was when I started   45  more clubs and staying after school more often   46  I didn’t have to feel so lonely. Luckily, at school, my friends were there   47  me. They were all there to give me a   48  or talk with me when I wanted to talk. I felt   49  when I was at school. Yet, something was still   50  — my parents.
Now I realize that nobody can   51  my parents. I wish that they would be there at home,   52  me to come back from school. There are   53  things my parents don’t know about me. I wish that they actually had a(n)   54  to understand me. I want them to understand that they’re my parents and I’m their kid and I   55  them.

A．communication

D．necessarily

A．disappointing

A．look forward to	B．think highly of
C．take the place of	D．look down upon

A．referring to

D．waiting for

C．a couple of