单项选择题
（）is a point midway between the forward and the after perpendicular.
A.Length overall B.After perpendicular C.Amidships D.Extreme breadth
单项选择题 （）length of the ship measured from extreme points of the ship forward and aft.
单项选择题 You should always wear（）when working on deck.
单项选择题 （）is the head of the Deck Department.
