A.3B.30C.1D.10
A.1/8B.1/4C.全部D.1/2
A.干式系統(tǒng)B.干濕式系統(tǒng)C.預(yù)作用系統(tǒng)D.濕式系統(tǒng)(水噴淋系統(tǒng))