调车作业，接近被连挂车辆时的速度为（）公里/小时。
A、3
B、4
C、5
D、6
参考答案：A
—Do you think their table tennis team will win the first place at the coming Asian Games?
— . Ours is much stronger than theirs.
A．Of course
B．Don’t mention it
C．By no means
D．It depends
流动法与非流动项目法
