單項(xiàng)選擇題Upon arrival at a port, a vessel is not allowed （） her ballast water, tanker washings or bilge water and other oily water at will.

A.to discharge
B.to be discharged
C.discharging
D.being discharged


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1.單項(xiàng)選擇題We prefer all the spare parts （） on board before departure.

A.to send
B.to be sent
C.for being sent
D.being to send

2.單項(xiàng)選擇題It is well known that the whole power distribution of the ship’s electrical services mainly depend on the（）.

A.sub-boards
B.main switchboards
C.emergency switchboards
D.distribution boards