单项选择题
A.sea B.ballast C.fresh D.cement
The sailor keeping （）watch should clean the gangway, th...
单项选择题The sailor keeping （）watch should clean the gangway, the rails, bulwark and the spaces around the gangway.
A.navigation B.gangway C.port D.anchor
The sailor taking （）watch should do cleaning work on th...
单项选择题The sailor taking （）watch should do cleaning work on the bridge.
A. 0 to 4 B. 4 to 8 C. 8 to 12 D. 12 to 16
The sailors do cleaning and repair work under the super...
单项选择题The sailors do cleaning and repair work under the supervision of the （）.
A. chief officer B. captain C. bosun D. second officer
