设（SP）=100H,（AX）=0FFFFH,CF=1PUSH AXADC AX,0PUSH AXPOP BX上述程序段运行后，（BX）=，（SP）=

设 AX=9ABCH, DX=8765HPUSH AXPUSH DXPOP AXPOP DX上述 4 条指令执行后, AX, DX中内容分别是( ) A: AX=9ABCH DX=8765H B: AX=9ABCH DX=9ABCH C: AX=8765H DX=8765H D: AX=8765H AX=9ABCH

执行以下指令后一定能使AX的值为0的是 。 A: MOV AX,1234HMOV CX,0000HXCHG AX,CX B: MOV AX,1234HMOV CX,0000HPUSH AXPOP CX C: MOV AX,1234HMOV CX,0000HMOV CX,AX D: MOV AX,0000HMOV CX,1234HMOV AX,CX