![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
速度160—250km/h的列车通过车站前()分钟,平过道监护人员必须出务立岗,平过道防护栏杆(门)必须锁闭,禁止任何车辆、行人通过。
A.10
B.15
C.20
D.30
查看答案
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.10
B.15
C.20
D.30
A.1000,1500
B.1000,2000
C.1500,2000
D.1750,2000
A.120
B.160
C.200
A.20km/h
B.160km/h
C.200km/h
D.250km/h