单项选择题
When the vessel entering the dock, the first work that engineer should contact with the shipyard （）
A.releasing the boiler water B.the explosion detecting and cleaning for the fuel tank C.the docking project related item D.shore power and fire fighting water supply
单项选择题 When the dock is refilled with water after docking repair, the first work which should be done by engineers is （）
单项选择题 During the deck repair,（） should be measured firstly before tail shaft is drawn out.
单项选择题 To ensure the quality of dock repair, C/E should know very well （）
