物理解题中有许多巧妙的特殊方法，例如，穷举法、等效法、极端法、赋值法、假设法等，若能恰当运用，可以起到畅通思路，简化运算、快捷解题的作用．正因如此，就要求解题者善于对问题进行周密细致的分析，善于把问题进行合理转化和严谨推理．否则，谬用特殊方法，反将弄巧成 There are many ingenious special methods in object comprehension questions, such as exhaustive method, equivalent method, extreme method, assignment method, hypothesis method, etc. If they can be used properly, they can play a smooth idea, simplify the operation, and quickly solve the problem. Because of this, it is required that the problem solver is good at thorough analysis of the problem and good at rational transformation and rigorous reasoning. Otherwise, if you use a special method, you