长轨车运行中，人员须离开轨端（）m以外，并禁止在长轨上走动。
A、1
B、2
C、3
D、4
参考答案：C
---I’m sorry. That wasn’t of much help.
---_____. And it was most helpful.
A．Thanks anyway.
B．It doesn’t matter.
C．Of course not.
D．Sure it was.
将下列结构与对应描述相连
