高中《物理》必修第二册“恒定电流”这一章中简单的电阻串、并联,部分电路欧姆定律等内容在初中《自然科学》中已学过,较简单。在高中阶段学习这章内容过程中,非纯电阻电路是学生学习的难点之一。因为初中所涉及的是纯电阻电路,非纯电阻电路是对初中所学知识的提高和延伸。 The simple resistor string, parallel connection, and Ohm’s law of some circuits in the secondary book “Physics” in the second volume of the “Constant Current” chapter have been learned in junior high school “Natural Science” and are relatively simple. In the process of studying this chapter in high school, non-pure resistance circuits are one of the difficulties for students to learn. Because junior high school involves a pure resistance circuit, a non-pure resistance circuit is an improvement and extension of knowledge learned in junior high schools.