单项选择题
The International Sewage Pollution Prevention Certificate (ISPP) is issued to （）
A.ships of above 200 GT to MARPOL
B.every ship of 400 GT and above
C.all ships
D.ships of more than 200 GT but less 400 GT
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The IOPP certificate is valid for （）
A.one year
B.two years
C.four years
D.five years -
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The shipboard oil pollution emergency plan will be invalid after （）
A.one year
B.two years
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Prior to a ship’s departure, （） may not always be tested.
A.fire fighting pump
B.the steering gear
C.life boat engine
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