![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
钢轨折断紧急处理,当断缝不大于30 mm时,可在断缝处上夹板或臌包夹板,用急救器加固,拧紧断缝前后各50 m范围内的扣件,并派专人看守,按不超过()km/h速度放行列车,且邻线限速不超过160 km/h
A.45
B.60
C.80
D.120
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
A、45
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.45
B.60
C.80
D.120
A、45
A.不小于30
B.不小于50
C.不大于30
D.不大于50
A.25
B.45
C.60
D.120
A.30
B.50
C.15
D.25
A.10.8
B.10.7
C.10.9
D.10
A.8
B.6
C.4.5
D.3.25
A.5
B.8
C.10
D.20