单项选择题

If separating effect is not good, which measure should be taken （）

A.working at intervals and properly heating
B.warming up to 70℃, increase water supply flow
C.improving impulse of water supply
D.reducing water supply flow

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单项选择题

Engine parameters shall be corresponded to NOx Technical Files. This is required by （）

A.MARPOL Annex Ⅲ
B.MARPOL Annex Ⅵ
C.MARPOL Annex Ⅴ
D.MARPOL Annex Ⅳ

单项选择题

Under MARPOL Code the ship to which it applies has to carry （）

A.an International Ship Security Certificate
B.an International Oil Pollution Certificate
C.a Safety Management Certificate
D.an International Ballast Water Management Certificate