单项选择题
Since the fire is increasing on board the vessel，the Captain orders that the ship be（）.
A.subtle B.dental C.brittle D.scuttled
单项选择题 Shipping society approved buoyant work vests are considered to be items of safety equipment and may be worn by members of the crew（）.
单项选择题 Removing which will extinguish a fire?（）.
单项选择题 Regular foam can be used on all but which flammable liquid?（）
