单项选择题

According to the passage, incomplete combustion is more likely to occur with gasoline because ______.

A．the combustion of gasoline releases photo chemically 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

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单项选择题

It can be inferred from the passage that a vehicle specifically designed to use methanol, for fuel would ______.

A．be somewhat lighter in total body weight than a conventional vehicle fueled with gasoline
B．have a larger and more powerful engine than a conventional vehicle fueled with gasoline
C．average more miles per gallon than a "gasoline alone" vehicle fueled With methanol
D．have a larger and heavier fuel tank than a "gasoline alone" vehicle fueled with methanol

单项选择题

The author would most probably regard the criticism of methanol as ______.

A．inaccurate because it ignores consumer's concerns
B．misguided because of its exclusively technological focus
C．flawed because of the assumption on which it is based
D．invalid because it reflects the personal bias of the critics