题目内容:
What can we learn from the second paragraph?
A.The new rules aim at controlling the number of automobiles and light trucks. B.Greenhouse gas emissions are expected to reduce by 40 percent to 50 percent.
C.The 2009 rules and the new rules are designed to push fuel consumption.
D.Fuel efficiency will increase, by 54.5 miles per gallon if fuel is effectively used.
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答案解析: