![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
E-N-002 4 2 3《高速铁路有砟轨道线路维修规则》第5.7.10条规定:桥上无缝线路养护维修,单根抽换桥枕应在实际锁定轨温+10℃~-20℃范围内进行,作业时抬起钢轨高度不应超过()mm
A.30
B.50
C.60
D.80
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
C、60
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.30
B.50
C.60
D.80
C、60
A.温度力
B.轨温
C.锁定轨温
D.应力
A.+0.2 0
B.-0.2 0
C.±0.2 0
D.+0.2 -0
A.1/(10vmax)
B.1/(11vmax)
C.1/(12vmax)
D.1/(13vmax)