单项选择题
A.an International Ship Security Certificate B.an International Oil Pollution Certificate C.a Safety Management Certificate D.an International Ballast Water Management Certificate
Which one is NOT the ‘clear grounds’ for a more detaile...
单项选择题Which one is NOT the ‘clear grounds’ for a more detailed inspection?（）
A.the master and the chief engineer are unable to communicate effectively B.serious corrosion on the hull C.damaged sanitary pump D.one page missing in the oil record book
The shipboard oil pollution emergency plan will be inva...
单项选择题The shipboard oil pollution emergency plan will be invalid after （）
A.one year B.two years C.four years D.five years
（）connectors hold best if a wire is accidentally pulled...
单项选择题（）connectors hold best if a wire is accidentally pulled or a connection becomes loose.
A.Ring type B.Fork type C.Spade type D.Push on pull off type
