下列指令中不会改变PC寄存器内容的是( )
A．MOV
B．JMP
C．CALL
D．RET
参考答案：A
—般根据实际经验，会车视距常按( )的停车视距计算。
A．2倍
B．3倍
C．4倍
D．6倍
-Let's dress up _____ a ghost.
-OK, you can dress up ____ white.[ ]
A as , in
B in, as
C for, with
D as, with
