由已认识的事物局部,通过概括、综合而认识事物的全部,是重要的认知方法;同样,由已认识的事物全部,通过解剖、分析而更深刻地认识事物的局部,也是重要的认知方法。 知全部而求局部,简称执全索局,是简单而又有效的思维方法。它的功能是,用此法解题可使难题变易,繁题变简,并能有效地堵绝漏解现象。 一、在完整图象中分割、截取 学生在学习物理的过程中,经常需要研究物理量的特定取值。但当符合条件的物理量可能有多种取值时,常常丢头落尾,表现出思维的混乱、无序。若物理现 It is an important cognitive method to locally recognize things through generalization and synthesis, and it is also an important cognitive method to understand all things through understanding and understanding. Know how. Knowing the whole thing and seeking locality, or simply calling it all, is a simple and effective way of thinking. Its function is that using this method to solve the problem can make the problem easier, the problem can be simplified, and the phenomenon of leakage can be effectively blocked. First, in the complete image segmentation, interception Students in the process of learning physics, often need to study the specific value of physical quantities. However, when the qualified physical quantity may have multiple values, it often loses its head and shows confusion and disorder. If physical