CPU从内存中读取指令时，需要先将程序计数器（PC）的内容输送到（） 总线上。
- A.数据
- B.地址
- C.控制
- D.接口
正确答案及解析
正确答案
B
解析
从内存中读取数据或程序指令时，首先应给出数据或指令在内存中的地址。CPU中的程序计数器（PC）的内容是要执行的指令的地址，因此，需先将程序计数器（PC）的内容输送到地址总线上。
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