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.
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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
单项选择题
Rocket fuels are more explosive than methane gas because of ______.
A．the temperature at which combustion takes place
B．the degree of oxidation accomplished bp the combustion process
C．the location of the combustion
D．the greater burning velocity
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