单项选择题
Which spoken emergency signal would you use to call a boat to come assist a man overboard?（）
A.Distress signal B.Urgency signal C.Safety signal D.None of the above
单项选择题 Which mooring line is likely to undergo the most strain when docking a ship under normal conditions?（）
单项选择题 Which mooring line has the least elasticity?（）
单项选择题 Which method of adjusting mooring lines is MOST useful for leaving a boat free to rise and fall with the tide?（）
