“比较”的方法,是化学研究中一种常用的思维方法,也是我们经常运用的一种最基本的教学方法。它既要研究事物之间的相同点,又要分析事物之间的不同点。这种方法的实质就是辨析现象、概念、规律的同中之异、异中之同,以把握其本质属性。在化学研究中,常常要根据实验结果,发现事物异同点,获得科学的结论。下足 “Compare ” method is a commonly used method of thinking in chemical research, and it is also one of the most basic teaching methods that we often use. It not only studies the similarities between things, but also analyzes the differences between things. The essence of this method is to distinguish phenomena, concepts and laws in the same, different, in order to grasp its essential attributes. In chemical research, often based on experimental results, find similarities and differences in things, access to scientific conclusions. Under foot