單項(xiàng)選擇題Oil slick caused by spillage of oil from tanker ship is().

A.a drop of oil
B.the emulsion of oil at sea surface
C.the weathered oil
D.the oil floating on the surface of the sea water


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1.單項(xiàng)選擇題No person on board any vessel to which Annex V to MARPOL 73/78 applies may discharge garbage of any type when().

A.less than 12 nautical miles from PRC
B.less than 12 nautical miles from nearest land
C.in the navigable waters of the PRC
D.less than 25 nautical miles from nearest land

5.單項(xiàng)選擇題How should cargo tank hatches be protected when the ullage opening is open and the tank NOT gas free?().

A.With gooseneck vents
B.With warning signs
C.With flame screens
D.With pressure-vacuum relief valves