CPU在执行指令的过程中，会自动修改（ ）的内容，以使其保存的总是将要执行的下一条指令的地址。
- A.指令寄存器
- B.程序计数器
- C.地址寄存器
- D.指令译码器
正确答案及解析
正确答案
解析
CPU执行指令的过程中，会自动修改PC的内容，PC是指令计数器，用来存放将要执行的下一条指令，本题选择B选项。
对于指令寄存器（IR）存放即将执行的指令，指令译码器（ID）对指令中的操作码字段进行分析和解释，地址寄存器（AR），不是我们常用的CPU内部部件，其作用是用来保存当前CPU所要访问的内存单元或I/O设备的地址。
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