单项选择题
A.NUM_ONE B.2NUM_ONE C.NUM_2 D.NUM_TWO
A.CMP CX，0 B.MOV AX，CX JZ LOP JZ LOP C.OR CX.CX D.JCXZ LOP JZ LOP
A.1FF6H B.2002H C.1FFEH<> D.1FFBH
A.寄存器寻址 B.立即数寻址 C.变址寻址 D.寄存器间接寻址
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