单项选择题
It is apparent that there was not sufficient depth of water（）and I claim that the estimated arrival draft as radioed to the agent to report to you was a close one.
A.for my vessel crossing safely B.my vessel is to cross safely C.for my vessel to cross safely D.for my vessel's crossing safely
单项选择题 Intact buoyancy is a term used to describe（）.
单项选择题 In the absence of external forces，the center of buoyancy of an inclined vessel is vertically aligned directly below the（）.
单项选择题 In practice，it is usual for the ship to be loaded（）to improve the vessel’s movement through the water.
