新托福考试阅读练习资料:无糖可乐

2011-03-22

托福阅读

  无糖可乐对于很多爱美人士来说是个福音,既能满足口腹之欲又能控制糖分摄入量。下面的新托福考试阅读练习资料讨论的话题就与它有关。

  Here’s an at-home experiment you can try.

  Take a can of “classic” Coca-Cola and a can of Diet Coke, and without opening either one submerge them in water. A deep sink or a bucket will do the trick. You’ll find the can of Diet Coke rises to the top, while the Classic Coke stays sunk. Can you guess why?

  Why?

  The answer lies in the chemical contents of the Diet Coke — in fact, in the very distinction that makes it “Diet”.

  Although their ingredients are otherwise similar, Die

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