![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
桥长超过()km时,应每隔约3km(单侧6km)在线路两侧交错设置1处可上下桥的救援疏散通道,并设置防护门
A.3
B.6
C.5
D.4
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
A、3
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.3
B.6
C.5
D.4
A、3
A.10m,3km/h
B.5m,3km/h
C.10m,5km/h
D.1m,3km/h
A.病人应取侧卧位或头部侧转
B.放置时间一般不宜持续超过3~5天
C.管端牵引重量约1kg
D.每隔12小时应将气囊放空10~20分钟
A.5
B.2
C.3
D.4
A.5
B.10
C.15
D.20