单项选择题
准备放艇。()
A. Get ready for lowering the boat. B. The muster station is usually on the boat deck. C. The cable is leading straight ahead. D. Hoist the anchor ball.
单项选择题 在集合地点集合。()
单项选择题 救生艇下水每隔三个月进行一次。()
单项选择题 Which letter means that oil-spilling has happened?()