CPU 执行指令时，先要根据程序计数器将指令从内存读取出并送入（ ），然后 译码并执行。
- A.数据寄存器
- B.累加寄存器
- C.地址寄存器
- D.指令寄存器
正确答案及解析
正确答案
解析
累加器寄存器是专门存放算术或逻辑运算的一个操作数和运算结果的寄存器
指令寄存器一般用来保存当前正在执行的一条指令。
存储器数据寄存器主要是用来保存操作数和运算结果等信息的，其目的是为了节省读取操作数所需占用总线和访问存储器的时间。
存储器地址寄存器一般用来保存当前CPU所访问的内存单元的地址，以方便对内存的读写操作。
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