2-3.在错误的指令后面的括号中打×。答:2-3.在错误的指令后面的括号中打×。 MOV@R1,#80H()MOVR7,@R1()MOV20H,@RO()MOVR1,#0100H()CPLR4()SETBR7,0()MOV20H,21H()ORLA,R5()ANLR1,#0FH()XRLP1,#31H()MOVXA,2000H()MOV20H,@DPTR()... MOV @R1,#80H ( ) MOV R7, @R1 ( ) MOV 20H,@RO ( ) MOV R1, #0100H ( ) ...