单项选择题
Upon completion of fueling a gasoline driven vessel it is necessary to（）.
A.keep ports，doors，windows，and hatches closed
B.start engines immediately
C.ventilate before starting engine
D.None of the above
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There are（）rats on board.
A.not
B.no
C.any
D.none -
单项选择题
The vessel’s quarter is located（）.
A.abeam
B.dead astern
C.just forward of the beam on either side
D.on either side of the stern -
单项选择题
The use of liners in riveted construction is eliminated by using（）.
A.lapped construction
B.strapped construction
C.joggled construction
D.belted construction
