进入初三的学习阶段,要接触一门新的课程——化学,同学们一定是既兴奋又紧张,兴奋的是想知道化学到底是一门怎样的课程,紧张的是想知道怎样才能学好它。和所有学科一样,每门学科都有它自己的研究对象,化学也不例外,化学研究的对象并不神秘,它就是我们周围的、我们赖以生存的物 After entering the third-year study stage, we must contact a new course—Chemistry. The students must be excited and nervous. The excitement is to know what kind of chemistry chemistry is. What’s nervous is to know how to learn it. . Like all disciplines, each discipline has its own research object, and chemistry is no exception. The object of chemical research is not mysterious. It is the things around us that we rely on to survive.