数学是定义物理量、表述物理规律最简洁、概括、精确、深刻的语言.然而,中学生在初次学习运用数学工具解决物理问题的过程中,往往对其表述的物理内涵认识不清,这应该引起物理老师的注意.首先,要引导学生正确理解数学表达式的物理含义,防止单纯地从数学形式上去错误地理解.典型的两个例子是电容的定义式C=Q/U.和电阻的定义式R=U/I.在这两个定义式的教学中,要提醒学生注意不能 Mathematics is the most concise, general, precise, and profound language for defining physical quantities and expressing physical laws. However, in the initial learning process of using mathematics tools to solve physical problems, middle school students often have unclear understanding of the physical connotations expressed by them. This should lead to physics. The teacher’s attention. First of all, to guide students to correctly understand the physical meaning of mathematical expressions, to prevent simply from the mathematical form to understand the wrong. Typical examples are the definition of the capacitor C = Q / U. And resistance definition R=U/I. In the teaching of these two definitions, it is necessary to remind students that they cannot