无缝线路限制长钢轨伸缩的有道床阻力、接头阻力、扣件阻力。
参考答案：对
If you have to catch the first bus every day, choose this hotel.It is very________for the station-it's
only a twominute walk. [ ]
A. close
B. certain
C. convenient
D. distant
实施状态检修应如何制定检修计划？
