一般地,解数学题有许多模式可套用,掌握了这些模式,可以减少解题中的盲目性,从而获得有益的启示.然而,有的问题若硬要去套用模式,反倒繁琐;而离开常规,抓住特点,反倒好解.这就有一个一般模式与特殊情况下的机遇的辩证关系问题.抓住这个机遇,对于我们的解题,常常起到化繁为简的作用,这 In general, there are many models available for solving mathematics problems. Grasping these patterns can reduce the blindness in problem solving and thus gain useful inspiration. However, if some problems are hard to apply, they are tedious; In order to grasp the characteristics, we have a good solution. This has a dialectical relationship between the general model and the opportunity under special circumstances. Seizing this opportunity will often play a role in simplifying and simplifying our problem solving.