2013雅思考试备考:雅思阅读模拟试题(1)
★Time to cool it Dec 13th 2006 From The Economist print edition 1 REFRIGERATORS are the epitome of clunky technology: solid, reliable and just a little bit dull.They have not changed much over the past century, but then they have not needed to.They are based on a robust and effective idea--draw heat from the thing you want to cool by evaporating a liquid next to it, and then dump that heat by pumping the vapour elsewhere and condensing it.This method of pumping heat from one place to another served mankind well when refrigerators' main... [ 查看全文 ]2013雅思考试备考:雅思阅读模拟试题(1)的相关文章