单项选择题
A.To work B.Working C.Having worked D.worked
Upon arrival at a port, a vessel is not allowed （） her ...
单项选择题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
We prefer all the spare parts （） on board before depart...
单项选择题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
It is well known that the whole power distribution of t...
单项选择题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
