单项选择题
A.Contamination of dry cargo by a wet cargo
B.Contamination of a clean cargo by a dirty cargo
C.Contamination of a food cargo by an odorous cargo
D.Overcarriage，overstowage，and short landing
单项选择题 Which action must be taken when an individual cargo tank is closed off from the inert gas system by the tank isolation valve?（）
单项选择题 When the dew point of the outside air is lower than or equal to the dew point of the air in the cargo hold，you should（）.
单项选择题 When referring to dry bulk cargoes，the term “flow state”（）.