A alchemy was widely used in people' s daily life alchemy was stagnant C. alchemists were somewhat misled D. many learned men found a clue to the mystery of alchemy 20. It can be inferred from the passage that A. after 1700 chemistry changed its aim and methods B. ancient greek phi losophers considered alchemical experiments to be of great importance C."the philosopher's stone"is a mysterious substance which can change a base metal into gold D. Alexandria was the birthplace of magic and early science of chemistry Astrology 答案部分 短文大意 本文讨论的是海水的含盐量。本文主 要讲述了引起海水 含盐量变化的三个基本过程,一是用蒸发的方法去除水分,二是与蒸发法相反的方法一一降 水,三是海冰的形成和融化A. alchemy was widely used in people’s daily life B. alchemy was stagnant C. alchemists were somewhat misled D. many learned men found a clue to the mystery of alchemy 20.It can be inferred from the passage that ____. A. after 1700 chemistry changed its aim and methods B. ancient Greek phi losophers considered alchemical experiments to be of great importance C. “the philosopher’s stone” is a mysterious substance which can change a base metal into gold D. Alexandria was the birthplace of magic and early science of chemistry Astrology 答案部分 1 短文大意 本文讨论的是海水的含盐量。本文主 要讲述了引起海水 含盐量变化的三个基本过程，一是用蒸发的方法去除水分，二是与蒸发法相反的方法——降 水，三是海冰的形成和融化