在教学过程中,比較起着重要的作用。因为要使学生正确认識每一个事物,正确理解每一个科学概念,就需要了解各个事物的本貭,而要正确认識事物的本貭,不但需要找出事物的共同点,也要找出事物的不同点。毛主席曾指出:“对于物貭的每一种运动形式,必須注意它和其他各种运动形式的共同点。但是尤其重要的,成为我們认識事物的基础的东西,则是必須注意它的特殊点,就是說,注意它和其他运动形式的貭的区别。只有注 In the teaching process, the more play an important role. Because to enable students to correctly understand every thing and correctly understand each scientific concept, it is necessary to understand the essence of each thing, and to correctly understand the essence of things, not only need to find out things in common, but also find out Different things. Chairman Mao once pointed out: "For every movement of matter, one must pay attention to its commonalities with other forms of movement, but of particular importance, what becomes the basis of our understanding of things must pay attention to it Special point, that is, note the difference between it and other forms of movement