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

All the following could be defined as combustion EXCEPT ______.

A．a quietly burning flame
B．an explosion
C．a radiator giving off heat
D．the drying of oil based paint

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