单项选择题
The supply of carbon dioxide used in the fixed extinguishing system aboard a cargo vessel MUST be at least sufficient for（）.
A.all the spaces of a vessel B.all cargo spaces C.the engine room and largest cargo space D.the space requiring the largest amount
单项选择题 The success of an indirect attack on a fire depends on the（）.
单项选择题 The straight stream capability of an all-purpose nozzle is used in fighting a class A fire to（）.
单项选择题 The sprinkler system of a survival craft is used to（）.
