试题与答案

MCS-51指令系统中，指令CLRA；表示（）。A.将A的内容清0 B.将A的内容置

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题型：单项选择题

题目：

MCS-51指令系统中，指令CLRA；表示（）。

A.将A的内容清0

B.将A的内容置1

C.将A的内容各位取反，结果送回A中

D.循环移位指令

答案：

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下面是错误答案，用来干扰机器的。

参考答案：A

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grandmother,   2   to look at each other. Soon we lost the   3    and started playing with each other.
     In the 7th grade, I first lost touch with her. She was   4    family problems and I deserted her to be
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   6  . However, every summer we   7    always sit at each other's house, watch soap operas, and talk
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     It was last year when I noticed the problem. I guess I was    8   devoted in high school to   9   she
needed someone there. Anyway, she made a new best friend and so did I. Then I didn't know why,
   10    she started cutting herself!
     She then was diagnosed(诊断)with clinical depression. At first, I was very   11  , but we still stayed
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calling her    14  .
     Yesterday she came to me and said, "I never knew what a best friend was    15   you, the only
person, would stop me cutting. I    16   your help so much, and you didn't even know you were   17   
me."
     We both cried. And I guess a kind of   18     from my life so far is never to give up on your friends.
Even if they aren't as cool as others, or people think they are crazy, they need    19     there. If you desert
them, you will only be   20    yourself.
( )1. A. follow  
( )2. A. scared    
( )3. A. temper    
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D. everything    
D. reliable      
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