执行下列程序,选择正确的结果: MOV SP,2000H MOV AX,0F0H MOV SI,1234H MOV DX,5678H PUSH SI POP DI SHL DX,1 TEST AX,DX PUSH DX HLT (1)SP=(); A)2000H B)1FFFHC)2001H D)1FFEH (2)DH内容入栈后,在堆栈中的偏移地址为() A)1FFFH B)1FFEHC)1FFDH D)1FFCH (3)DL内容入栈后,在堆栈中的偏移地址为() A)1FFFH B)1FFEHC)2000H D)1FFCH (4)(AX)=() A)0H B)78HC)0F0H D)56H (5)(DI)=() A)1234H B)5678HC)2000H D)00F0H (6)(DX)=() A)5678H B)0ACF0HC)2B3CH D)0ABF0H (7)标志位ZF=() A)0 B)1 C)不定 D)无值