執(zhí)行下列程序后,(AL)=() MOV AL,92H SUB AL,7lH DAS
A.21 B.11 C.21H D.11H
A.CF和OF B.CF和PF C.CF和ZF D.ZF和OF
A.D2H和75H B.5DH和47H C.2EH和7lH D.47H和71H