单项选择题
Throwing overboard of goods in order to lighten the vessel or improve its stability in case of an emergency defines（）.
A.dropping off B.jettison C.throwing away D.taking off
单项选择题 To evacuate a vessel from crew and passengers following a distress means（）.
单项选择题 To increase the distance to the vessel ahead by reducing one’s own speed means（）.
单项选择题 To run a vessel upon a beach to prevent its sinking in deep water means（）.
