初中学生的思维正处于从具体的形象思维向抽象的逻辑思维过渡的质变阶段,抽象的逻辑思维开始占有相对的优势。但是,他们在学习较复杂的概念时,仍然需要具体形象的支持,因此我们在初中物理教学中往往借助于具体的、学生熟悉的问题或习题,帮助他们建立概念,掌握公式。但是这些问题或习题的选择必 The thinking of junior middle school students is in the qualitative phase of transition from concrete image thinking to abstract logical thinking, and abstract logical thinking has begun to possess relative advantages. However, when they are learning more complex concepts, they still need the support of specific images. Therefore, in the physics teaching of junior middle school, we often use specific problems or exercises that are familiar to students to help them establish concepts and master formulas. But the choice of these questions or exercises must be