单项选择题
The success of an indirect attack on a fire depends on the（）.
A.size of the fire when initially observed B.complete containment of the fire C.cooling ability of the firefighting agent D.class of the fire
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（）.
单项选择题 The spread of fire is prevented by（）.
