单项选择题
A.MOV AL,ABCB.MOV AL,ABC1C.MOV AL,[1000H]D.MOV AL,[BX]
A.MOV AL,ABCB.MOV AX,1000HC.MOV AL,ABC1D.MOV AL,AH
A.NOT AXB.XOR AX,0FFFFHC.OR AX,0FFFFHD.AND AX,0FFFFH