“对比法”是将相关联的知识进行对比,分析其同异,区分其本质特征和非本质特征,突出矛盾的特殊性的一种教学方法。运用对比法进行教学,能澄清学生对一些容易混淆的物理概念、规律和公式的模糊认识。教学中应该有计划地把相关的物理概念、规律和公式运用对比法进行讲解,培养训练学生作比较找联系的能力,在比较中弄清事物之间的共同点和差异点,找出它们之间的联系与区别。 The Contrast Method is a teaching method that compares the related knowledge, analyzes its similarities and differences, distinguishes its essential characteristics from its non-essential ones, and highlights the particularity of contradiction. Using contrasting methods of teaching can clarify students' vague awareness of some confusing physical concepts, laws and formulas. Teaching should be related to the physical concepts, laws and formulas to explain the use of contrast method to train students to compare the ability to find contact in the comparison of things to find out the commonalities and differences between the points to find them The connection and difference between.