A.Carbon dioxide
B.Carbon monoxide
C.Carbon trioxide
D.Hydrogen sulfide
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A.at a maximum rate of two ounces per day
B.after mixing with an equal quantity of fresh water
C.if gather during or immediately after a hard rain
D.under no circumstance
A.wood
B.oil
C.electrical equipment
D.magnesium
A.skimmers
B.straw
C.dispersants
D.sawdust
A.Classes A and B
B.Classes B and C
C.Classes C and D
D.Classes A and D
A.Magnesium
B.Paper
C.Wood
D.Diesel Oil
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（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
Under MARPOL Code the ship to which it applies has to carry （）
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To proceed to the assistance of a ship in distress is（）
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