假设已知(DS)=2900H,(ES)=2100H,(SS)=1500H,(SI)=00A0H,(BX)= 0100H,(BP)=0010H,数据变量名VAL的偏移地址值为0050H,试指出下列源操作数字段的寻址方式是什么? (1) MOV AX,0ABH (2) MOV AX,BX (3) MOV AX,[100H] (4) MOV AX,VAL (5) MOV AX,[BX] (6) MOV AX,ES:[BX] (7) MOV AX,[BP] (8) MOV AX,[SI] (9) MOV AX,[BX+10] (10) MOV AX,VAL[BX] (11) MOV AX,[BX][SI] (12) MOV AX,[BP][SI]