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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热门试题

单项选择题

An attempt on the part of the author of this passage to give a more informal tone to his writing occurs in ______.

A．paragraph 2
B．paragraph 4
C．paragraph 5
D．paragraph 7

单项选择题

Calhoun stabilized the rat population ______.

A．when it was double the number that could live in the enclosure without stress
B．by removing young rats
C．so that there was a constant number of adult rats in the enclosure
D．All of the above are correct