单项选择题
For a general cargo ship, is not the necessary certificate/document that the PSCO will examine（）
A.Survey Report File B.Minimum Safe Manning document C.Certificates of Competency D.International Oil Pollution Prevention
单项选择题 The guide shoes are secured to the crosshead by means of（）
单项选择题 Which one of the following repair will cost the least cost?（）
单项选择题 Why shiprepair is an inherently difficult business to manage in the conventional sense?（）
