正方体是立体几何中最常见、最特殊的几何体,其点、线、面的位置关系非常容易理解·我们在解决立体几何问题时,若能联想某些图形与正方体的关系,并利用其特点及性质帮助解题,则起到事半功倍的效果·本文从以下六个方面浅淡正方体的巧妙运用·1利用正方体构造反例判断命题的真假 The cube is the most common and special geometry in the three-dimensional geometry. Its positional relationship between points, lines, and surfaces is very easy to understand. When we solve the problem of three-dimensional geometry, we can associate associations between certain shapes and cubes and use their characteristics. The nature helps to solve the problem, then play a multiplier effect. This article uses the clever use of the cube from the following six aspects. 1 Use the cube to construct the counterexample to judge the true and false of the proposition.