单项选择题
A.only one person may talk at a time B.only two persons may talk at the same time C.the radio only transmits D.the radio only receives
A mark or place at which a vessel comes under obligator...
单项选择题A mark or place at which a vessel comes under obligatory entry，transit，or escort procedure is know as（）.
A.Way point B.Receiving point C.Reporting point D.Closest Point
A call between any two ship stations on an intership wo...
单项选择题A call between any two ship stations on an intership working frequency shall have a maximum duration of（）.
A.2 minutes B.3 minutes C.4 minutes D.5 minutes
（），you can’t finish discharging tomorrow!A.What pityB.W...
单项选择题（），you can’t finish discharging tomorrow!
A.What pity B.What a pity C.What the pity D.What pities
