单项选择题
Flames from small leaks of LFG may be extinguished by（）.
A.utilizing carbon dioxide or dry chemical fire extinguishers B.utilizing soda and acid fire extinguishers C.blowing the flames out D.letting it burn itself out
单项选择题 Flame screens are used to（）.
单项选择题 Fixed CO2 systems would not be used on crew’s quarters or（）.
单项选择题 Firefighting foam is only effective when the foam（）.
