单项选择题
A.Shifting cargo
B.Moving cargo
C.Removing cargo
D.Trimming cargo
单项选择题 Transverse frames are more widely spaced on a ship that is designed with the（）.
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（）.