单项选择题

The major difference between oxidation and fire is that ______.

A．their burning velocities differ in rate
B．oxidation is a chemical reaction while fire is a physical reactionp
C．oxidation does not create heat
D．they occur at different temperatures

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热门试题

单项选择题

Rocker fuels are more explosive than methane gas because of ______.

A．the temperature at which combustion takes place
B．the degree of oxidation accomplished by the combustion process
C．the presence of inhibitors
D．the great burning velocity

单项选择题

A steady flame in a gas range 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 burning velocity
D．a free flowing supply of air from the openings in the head of the burner