單項(xiàng)選擇題How long are you prohibited to consume alcohol prior to serving as a member of a watch?（）

A.within two hours
B.within three hours
C.within four hours
D.within five hours


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1.單項(xiàng)選擇題It is dangerous for vessels without the operational radar（）the estuary.

A.to get
B.to approach
C.to proceed
D.to close

2.單項(xiàng)選擇題Bales close to the deckhead should be covered to prevent（）.

A.damage by dripping sweat
B.damage by odor contamination
C.from striking structure
D.from steel rusty

4.單項(xiàng)選擇題When steering by autopilot,how often should the steering be checked?（）

A.12 times on each watch
B.When time allows
C.At least once a watch
D.No checking is necessary

5.單項(xiàng)選擇題（）is the act of allocating space to containers on board of a container ship in the order of the discharge ports.

A.Container loading
B.Container discharging
C.Stowage planning
D.Container checking