学习化学应提倡“瞻前顾后”。所谓“瞻前顾后”就是将所学知识前后对照,不仅要温故知新,还要破旧立新,以保证认知的准确性,加深理解。例如我们在课本第一册第二章学习了氧化反应的概念:物质与氧发生的化学反应叫氧化反应。这时同学们的认识停留在“物质与氧气的反应”这一层面 Learning chemistry should advocate “looking forward.” The so-called “looking forward” is to compare the knowledge before and after, not only to learn new things from time to time, but also to break new ones to ensure the accuracy of understanding and deepen understanding. For example, we learned the concept of oxidation in the second volume of the first volume of the textbook: the chemical reaction of matter with oxygen is called oxidation. At this time, the understanding of the students stays at the “reaction of matter and oxygen”