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  3. Because natural gas is composed mostly of methane, a simple hydrocarbon, vehicle

Because natural gas is composed mostly of methane, a simple hydrocarbon, vehicle

游客2024-01-13  68
问题 Because natural gas is composed mostly of methane, a simple hydrocarbon, vehicles powered by natural gas emit less of certain pollutants than the burning of gasoline or diesel fuel.
选项 A、less of certain pollutants than the burning of gasoline or diesel fuel
B、fewer of certain pollutants than burning gasoline or diesel fuel do
C、less of certain pollutants than gasoline or diesel fuel
D、fewer of certain pollutants than does burning gasoline or diesel fuel
E、less of certain pollutants than those burning gasoline or diesel fuel
答案 E
解析 A、B、C、D中than之后的比较物都与than之前的vehicle不具可比性。
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