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计算机指令系统往往具有多种寻址方式。直接寻址方式指(111)，立即数寻址方式指(112)；寄存器寻址方式是指(113)。假设基址寄存器的内容为2000H，变址寄存器的内容为 03A0H，指令的地址码部分为2BH，当前正在执行的指令所在地址为3A00H。若采用相对寻址方式，操作数实际地址为(114)。若采用变址寻址，并考虑基址时，数据的实际地址为(115)。A.
操作数在CPU中
B.
操作数地址在指令中
C.
操作数地址在寄存器
D.
操作数就是指令的一部分
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