单项选择题
H旗的意思是“我船上有引员”。()
A. The meaning of Flag H is “I have a pilot on board”. B. You should stop your vessel instantly. C. The meaning of Flag H is “I require assistance.” D. The meaning of Flag H is “I have PSC on board”.
单项选择题 引航员什么时间来?()
单项选择题 记住,安全第一。()
单项选择题 留神脚下!抓住扶手。()