A large oil fire is best extinguished with（）

Fires in escaping flammable gas are quickly brought under control by（）

A.stopping the flow of gas
B.reducing the chemical chain reaction
C.increasing the oxygen supply
D.cooling below the autoignition point

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If a fire occurs in the boiler room because of a leaking fuel line to a burner, you shut off the fuel using the（）

A.burner valve
B.root valve
C.quick closing valve
D.oil return valve

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