单项选择题
A.Two main areas of skill are involved in the construction of ship
B.There are distinct divisions in responsibilities between naval architects and marine engineers
C.Each ship will assume varying proportions according to its type
D.Ships can be divided into different categories from different perspectives
单项选择题 The displacement of a ship is to the total weight, all told, of the relevant loaded ship（）
单项选择题 When a ship in loaded condition floats at arbitrary water line, its displacement is to the relevant mass of water displaced by the ship（）
单项选择题 Propulsion engines and the vast majority of auxiliary generator engines are designed to allow a generous through-flow of scavenge air in order to control （）