如果8251A的方式字寄存器的地址为2F1H,则它的控制字寄存器的地址是( )。 A

题型:单项选择题

问题:

如果8251A的方式字寄存器的地址为2F1H,则它的控制字寄存器的地址是( )。

A.2F0H
B.2F2H
C.2T3H
D.2F1H

考点:计算机等级考试PC技术三级PC技术笔试
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I am Peter Smith. I am from the USA.I like to play basketball and volleyball. I can speak Chinese, but not much. I am in the school basketball club. I am not busy on Tuesday afternoon and Friday afternoon. I want to play basketball and speak Chinese with Chinese-speaking students. Please call me at 13899495387.

I am Jack Liu. I am from China. I like to play ping-pong and soccer. I like basketball, too.I can speak English, but not very well. I am in the school soccer club. I have time on Monday afternoon and Friday afternoon. I want to talk to English-speaking students. My phone number is 13348954621.

小题1:Peter Smith is an American student, and he plays basketball.

小题2:Peter has time on Wednesday and Tuesday afternoon.

小题3:Jack is a Chinese-speaking student. He wants to talk to an English speaker.

小题4:Jack and Peter can meet on Friday.

小题5:The two boys aren’t from the same country.

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C.呼吸困难

D.脑血管痉挛

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A.20~30

B.30~40

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