Supply the ()before starting an air compressor.
A. fuel oil
B. cooling water
C. steam
D. power
CRH5司机室侧窗可以作为紧急出口使用。
A. 正确
B. 错误
All of the following are engaged in fishing EXCEPT().
A vessel trawling
B. A vessel trolling
C. A vessel setting nets
D. A vessel tending line
发生紧急情况时,应由谁负责客舱广播?()
A. 2号乘务员
B. 3号乘务员
C. 乘务长
D. 安全员