假定(A)=0FH,(R7)=19H,(30H)=00H,(R1)=40H,(40H)=0FFH。执行指令DEC ADEC R7DEC @R1后,累加器A的内容为(),R7的内容为(),30H的内容为(),40H的内容为()。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
执行以下指令后:
MOV AL,2BH
OR AL,0FH
AL的内容为:()
执行以下指令后:
MOV AL,56H
OR AL,0FH
AL的内容为:()
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