flame sterization

When there is a flame failure in an automatically fired auxiliary boiler, the _____.

Failure of the burner flame in an auxiliary boiler would probably be a result of .A.water

A dazzling white burner flame in the boiler furnace indicates _____.A.no combustionB.depos

Wires should have each feature of the following except ____.A.flame retardantB.moisture re

The evening sky flamed with red and orange.（英译中)

The firemen were unable to control the blaze.A.flowerB.blowC.flameD.stroke