2. 外语
  3. This passage gives a general description of the advantages and disadvantages of a hybrid auto- mobile. Compared with a big engi

This passage gives a general description of the advantages and disadvantages of a hybrid auto- mobile. Compared with a big engi

admin2013-06-02  68
问题 This passage gives a general description of the advantages and disadvantages of a hybrid auto- mobile.
Compared with a big engine, a small one can improve the gas mileage by running closer to its ______.
选项
答案maximum load
解析 本题涉及小型发动机提高单位油量英里数所采取的方式。Smaller Engines are More Efficient下首段第二句为答案出处。In a small engine，however，the efficiency can be improved…by operating the engine closer to its maximum lead表明小型发动机通过接近最大负载运行的方式提高效率(即单位油量英里数)。
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大学英语六级

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