数学知识是纵横贯通、前后联系的整体，应当用“动”的观点去看待它们，而不是孤立的、静止的、永恒不变的内容。因此，对于某些典型命题，在证完之后，可引导学生用“动”的观点，多角度、多层次的去寻找另外的形式和解法。这不仅能够极大地增强学生的学习兴趣，拓宽学生的解 The knowledge of mathematics is a whole in a vertical and horizontal relationship. It should be viewed from a “dynamic” point of view rather than an isolated, static, immutable content. Therefore, for some typical propositions, after the completion of the test, students can be guided to use “dynamic” views, multi-angle, multi-level to find alternative forms and solutions. This will not only greatly enhance students’ interest in learning, but also broaden students’ understanding