单选题
According to the passage, incomplete combustion is more likely to occur with gasoline because______.
A、
the combustion of gasoline releases photochemically active hydrocarbons
B、
the combustion of gasoline involves an intricate series of reactions
C、
gasoline molecules have fewer carbon-carbon bonds
D、
gasoline is a carbon-based fuel with smaller molecules
【正确答案】
B
【答案解析】
这是一道细节题。根据第二段3、4两句可知B项是汽油燃烧不完全的原因，故为答案。A项是汽油燃烧不完全可能带来的结果，不能回答本题。
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