题目

阅读理解   Once upon a time there lived two brothers named Jacob and William in Germany. They liked to listen to old stories and then write them down. So they had enough stories to make a book. You can guess the name of the book! It is Grimms’ Fairy Tales.    The story of this little book began when the brothers were still in school. And it started with a good teacher. The teacher liked to find out how things happened. Soon the two brothers were doing the same thing. They asked questions and then looked for answers.   Among the questions the brothers asked, “Who made up the old f“花气袭人知骤暖,鹊声穿树喜新晴”，这是南宋诗人陆游的《村居书喜》中的两句诗，对于前一句，从物理学的角度理解为:花朵分泌的芳香油分子 加快，说明当时周边的气温突然__________。