摘要
本期的阅读文章选取了一篇食品安全类的科技文。此类文章是近年来比较常见的,一般出题点比较细,需要广大考生加以重视。Why does cream go bad faster than butter?Some researchers think they have the answer,and it comes down to the structure of the food,not its chemical composition—a finding thatcould help rid some processed foods of chemi-cal preservatives.Cream and butter contain pretty much
