单项选择题

Which of the following could not be defined as combustion

A．A quietly burning flame.
B．An explosion.
C．A radiator giving off heat.
D．The drying of oil-based paint.
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单项选择题
Which of the following states the major difference between oxidation and fire
A．Their burning velocities differ in rate.
B．Oxidation is a chemical reaction while fire is a physical reaction.
C．Oxidation does not create heat.
D．They occur at different temperatures.
单项选择题
A steady flame in a gas burner is the result of ______.
A．a burning velocity equal to the combustion wave
B．fuel being supplied at the same rate as the combustion wave
C．fuel being supplied at a higher rate than that of the burning velocity
D．a low combustion wave
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