单项选择题
A.is not an effective agent on Class B fires
B.does little or no cooling
C.dissipates quickly
D.is rapidly absorbed by the liquid
单项选择题 A shipboard Oil Pollution Emergency Plan is required of（）.
单项选择题 Flooding of any compartment in a ship that results in a serious loss of reserve buoyancy will always（）.
单项选择题 A group of crew members standing by in case of an emergency in order to assist other teams in action if necessary is a（）.