单选题A fire is considered "under control" when （）.Aall hands are at their fire stationsBall fire-fighting equipment is at the sceneCthe fixed systems are activatedDthe fire is contained and no longer spreading
单选题
A fire is considered "under control" when （）.
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
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