2. 外语
  3. This passage gives a general description of the advantages and disadvantages of a hybrid auto- mobile. We want to build a hybri

This passage gives a general description of the advantages and disadvantages of a hybrid auto- mobile. We want to build a hybri

admin2013-06-02  63
问题 This passage gives a general description of the advantages and disadvantages of a hybrid auto- mobile.
We want to build a hybrid car partly because it has lower ______ than a gasoline- powered one.
选项
答案tailpipe emissions
解析 本题涉及发明混合动力汽车的原因。Why Build Such a Complex Car?下第二句即为答案出处。The reason is twofold：to reduce tailpipe emissions and to improve mileage。
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