单选题The primary function(s) of an automatic sprinkler system is(are) to（）.Aextinguish the fire which triggers itBlimit the spread of fire and control the amount of heat producedCprotect people in the areas which have sprinkler headsDalert the crew to the fire
单选题
The primary function(s) of an automatic sprinkler system is(are) to（）.
A
extinguish the fire which triggers it
B
limit the spread of fire and control the amount of heat produced
C
protect people in the areas which have sprinkler heads
D
alert the crew to the fire
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