单项选择题
A.centerline system of framing
B.isometric system of framing
C.longitudinal system of framing
D.transverse system of framing
单项选择题 The heavier outboard strake of deck plating on a ship is called the deck（）.
单项选择题 The disinfection of various compartments in a vessel by filling with a gaseous agent to destroy rats and all insects pests which act as germ carriers means（）.
单项选择题 The correction to KG for longitudinal free surface effects for a vessel can be found by dividing the vessel’s displacement into the（）.