单项选择题
A.G B.H C.B D.N
Vessels must （） pilot at waiting anchorage．A.waitB.wait...
单项选择题Vessels must （） pilot at waiting anchorage．
A.wait B.wait for C.be waited D.be waited for
There shall be two principal （） through the harbor for ...
单项选择题There shall be two principal （） through the harbor for the passage of vessels of over 60 tons burden．
A.straits B.channels C.canals D.roadsteads
The transfer procedures for oil products are required t...
单项选择题The transfer procedures for oil products are required to be posted （）.
A.in the pilothouse B.in the officer's lounge C.in the upper pumproom flat D.where they can be easily seen or readily available
