单项选择题

Before the oily water is installed on board ships, it must have （）

A.IOPP
B.type approval certificate
C.cargo ship safety equipment certificate
D.cargo ship safety certificate

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单项选择题

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

单项选择题

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

单项选择题

A.one year
B.two years
C.four years
D.five years