单项选择题
A.all emergency signals
B.instructions for lowering the survival craft
C.the time each weekly drill will be held
D.work schedule
单项选择题 Small oil spills on deck can be kept from going overboard by（）.
单项选择题 Seeing that all hands are familiar with their duties，as specified in the muster list，is the responsibility of the（）.
单项选择题 An inflatable liferaft is thrown into the water from a sinking vessel. What occurs automatically after the painter trips the CO2 bottles to inflate the raft?（）