单选题A dazzling white burner flame in the boiler furnace indicates （）.Ano combustionBdeposits in the fuelCexcessive air in the fuelDcold fuel oil
单选题
A dazzling white burner flame in the boiler furnace indicates （）.
A
no combustion
B
deposits in the fuel
C
excessive air in the fuel
D
cold fuel oil
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