相关考题
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单项选择题
The combustion of larger molecules,（）have multiple carbon-carbon bonds involves a more complex series of reactions.
A.what
B.which
C.that
D.who -
单项选择题
All of these alternatives are carbon-based fuels（）molecules are smaller and simpler than those of gasoline.
A.which
B.who
C.what
D.whose -
单项选择题
The hydrocarbons they do emit are less likely to（）ozone.
A.general
B.generation
C.generate
D.generous
