In case of fire, ______ will close automatically, preventing additional oxygen to enter the space to fuel and spread a fire.(1.0)
A.the fire dampers B.the indicators C.the watertight doors D.the ventilators正确答案A
In case of fire, ______ will close automatically, preventing additional oxygen to enter the space to fuel and spread a fire.(1.0)
A.the fire dampers B.the indicators C.the watertight doors D.the ventilators正确答案A
