直径为177.8mm的钻铤本体伤痕深度不超过（）mm。
A、7.5
B、6.5
C、8.5
D、9.5
参考答案：B
— You didn't lock the back door.
— You are wrong. I ______. [ ]
A. have locked it
B. lock it myself
C. did lock it
D. do lock it
假设(DS)=1000H，(DI)=0400H，(10410H)=FFH，(10041H)=00H，下列指令执行(AX)值是0420H的指令是( )。
A．LEA AX,20[DI]
B．MOV AX，OFFSET DI
C．MOV AX,20[DI]
D．LEA AX，[DI]
