單項(xiàng)選擇題將十進(jìn)制數(shù)75以壓縮BCD碼送入AX,正確的指令是()

A.MOVAX,0705H
B.MOVAX,0075H
C.MOVAX,0705
D.MOVAX,0075


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1.單項(xiàng)選擇題完成BX-CX→AX的錯(cuò)誤操作是()

A.SUBAX,BXSUBAX,CX
B.SUBBX,CXMOVAX,BX
C.XCHGAX,BXSUBAX,CX
D.MOVAX,BXSUBAX,CX

2.單項(xiàng)選擇題將字符串“INPUT”保存到存儲(chǔ)單元MESS,正確的偽指令是()

A.INPUTDB"MESS"
B.INPUTDBMESS
C.MESSDBINPUT
D.MESSDB"INPUT"