“明月松间照,清泉石上流”,好幅绝妙的对偶,让人感到美不胜收.在数学解题过程中,如果我们能恰当地运用对偶关系,巧构对偶式,不仅能提高解题速度,同样也会给人带来美的享受.它别开生面、独具“风味”,能在纷繁的困惑中求得简捷的解法,曲径通幽,回味无穷!现举数例说明,供参考.例 “Matsu moonlight according to the clear spring stone upper stream”, wonderful wonderful dual, people feel beautiful.In the process of mathematical problem solving, if we can properly use the dual relationship, the clever formation of duality, not only can improve the speed of problem-solving, The same will give people the same enjoyment of the United States.It is unique, unique “flavor”, can be obtained in the numerous puzzles in a simple solution, winding path, aftertaste! Cite a few examples, for reference.