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长方体是立体几何中常见的几何体．由于长方体中线面关系丰富，其中又包含了一些线段和角的特殊数量关系，因此在解题中，它有着不容忽视的作用．在数学教学过程中，若能引导学生巧用长方体，不仅可以沟通知识之间的联系，加深对有关知识的理解，还可以提高学生的空间想象...
The cuboid is a common geometry in solid geometry. Because of the richness of the cuboids in the middle of the cuboid, it also contains some special relations between the number of line segments and angles. Therefore, in solving problems, it has a role that cannot be ignored. In the process of mathematics teaching, if we can guide students to use cuboids wisely, we can not only communicate the links between knowledge, deepen the understanding of relevant knowledge, but also improve students’ space imagination...