（1）用于存放执行指令的地址。若存储器按字节编址且指令长度为_爱下问搜题

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问题单项选择题

（1）用于存放执行指令的地址。若存储器按字节编址且指令长度为 16 位，则程序顺序执行时，每执行一条指令，程序计数器的值增加（2）。

2（）

A．1

B．2

C．3

D．4

答案

参考答案：B

选择题

若log_xy=-2，则x+y的最小值为（　　）

3	2

3	3

填空题

完成句子。
根据语境, 在所给单词或词组中选择予以适当的一个, 并用其正确形式填空.

get away with settle down looking forward to ave a gift for tell a lie
account for bring up prevent from in memory of block out

1. Father has worked in the south for five months.we are        his return.
2. A big performance was held        the people who died in the earthquake.
3. since you can not     coming late,you had better apologize to your teacher.
4. I don't like to make friends with a person who often              .
5. His illness             her absence.
6.a fter his parents died, john        by his elder sister and brother-in-law.
7. Nothing can        him        marrying her.
8. Black clouds        the sun light just now.
9. Back from abroad ,the young couple decided to        in Nanjing.
10. He          singing sounds. He has a golden voice.