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[判断题]
汽油蒸发速度若太快,说明汽油中轻质组分少,汽油在使用过程中损耗大,安全性能差,高温易产生气阻现象。()
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第11题
说明下述各项中每一对之间哪个更富有价格弹性:
(1)某一特定品牌牙膏的需求与普通牙膏的需求;
(2)短期内汽油的需求与长期内汽油的需求。
Explain which of the following items in each pair is more price elastic.
a. The demand for a specific brand of toothpaste and the demand for toothpaste in general
b. The demand for gasoline in the short run and the demand for gasoline in the long run