1　问题的提出众所周知,中学物理教材中的许多物理概念是运用比值定义法来定义的.比如密度、加速度、场强等.然而,我们的调查表明,中学物理教师对比值定义法的理解情况却不尽如人意.许多中学物理教师在被问及比值定义法的定义或本质时,几乎很少有人能回答出来.上述问题产生的根 1 The issue is well-known. Many physical concepts in middle school physics textbooks are defined using the ratio definition method, such as density, acceleration, field strength, etc. However, our survey shows that the understanding of the definition of comparative values ​​of middle school physics teachers Unsatisfactory. When many middle school physics teachers are asked about the definition or nature of the definition of ratio, few people can answer it.