单项选择题
The（）is a series of trials done at sea to determine whether the ship has met the specifications of design, modification, or repair.
A.Sea trial B.Bed-test C.Engine performance D.PSC inspection
单项选择题 When is dock survey carried out?（）
单项选择题 （）, where a ship is refitted for a different use.
单项选择题 （）, where extensive work, particularly to the ship’s structure may be repairedThese are the result of groundings collisions and other accidents.
