在解立体几何的线面关系问题时,虚拟与题设相同或相似的模型,并以此作为研究对象,展示立体几何中较抽象的对象为具体可操作的对象,既可以把复杂的过程分解为单一过程,又可把抽象的问题转化为多个简单的问题,使复杂的问题简单化． When solving the problem of the line-plane relationship of solid geometry, the same or similar model is used for the virtual and the title, and this is used as the research object. The more abstract object in the three-dimensional geometry is a specific operable object, which can not only decompose the complicated process. For a single process, the abstract problem can be transformed into multiple simple problems, simplifying the complex problem.