单选

执行指令时，操作数存放在内存单元中，指令中给出操作数所在存储单元地址的寻址方式称为(23)。

A．立即寻址
B．直接寻址
C．相对寻址
D．寄存器寻址

试题出自试卷《软件水平考试（初级）程序员上午（基础知识）模拟试卷25》

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