单项选择题
The necessity of the segregation of cargoes is determined by（）.
A.experience from practice B.various types of cargoes C.different types of ships D.personal abilities
单项选择题 The officer of the watch should（）comply with the collision rules.
单项选择题 The phrase when built in the certificate of vessel’s nationality definitely means（）.
单项选择题 The port in which crew or passengers go on board the ship is called（）.
