MOV AX, ES:[BX][SI]的源操作数的物理地址是( )。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
有如下程序:
START: MOV BL,67H
MOV AL,BL
MOV CL,4
SHR AL,CL
MOV BH,AL
OR BH,30H
MOV AL,BL
AND AL,OFH
MOV BL,AL
OR BL,30H
INT 3
运行上面程序后,BH=(),BL=()
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