救援列车牵引运行时前方进路由（）负责了望和确认，推进运行时前方进路由故障车司机负责了望和确认。
参考答案：救援车司机
（）是一种气流。
Although KG for a vessel in lightweight is relatively high, the vessel is stiff because（）.
A.KM is small
B.KM is high
C.BL is smal
l D.KB is large
