单项选择题
A.keep ports，doors，windows，and hatches closed B.start engines immediately C.ventilate before starting engine D.None of the above
There are（）rats on board.A.notB.noC.anyD.none
单项选择题There are（）rats on board.
A.not B.no C.any D.none
The vessel’s quarter is located（）.A.abeamB.dead asternC...
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
The use of liners in riveted construction is eliminated...
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
