A、all hands are at their fire stations
B、all fire-fighting equipment is at the scene
C、the fixed systems are activated
D、the fire is contained and no longer spreading
更多“A fire is considered "under control" when （）.”相关的问题
A、CO2 (carbon dioxide) fire extinguishers B、foam fire extinguishers C、water (stored pressure) fire extinguishers D、All of the above
A、The agent is considered nontoxic at room temperature in low concentrations B、The agent is less effective than carbon dioxide C、Halon primarily extinguishes the fire by cooling D、The agent cannot be used on electrical fires because it leaves a residue
A、A.fire pumps B、B.fire mains C、C.hydrants and hoses D、D.closing appliances which are kept permanently closed at sea
A、Carbon dioxide is corrosive when exposed to fire B、Carbon dioxide should be applied slowly to a large engine room fire C、Its total cooling effect is far greater than water D、Its smothering effect is excellent for class B fires
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