在竞赛中,一些“没有数据”的求值题让同学们望而生畏,无从下手。其实,在解答这类问题时,只要注意挖掘题目隐含的条件信息,再结合相关的定义、性质、图形结构等,完全可以在“没有数据”的求值题中“挖出”数来,下面就介绍几种“挖数法”。 In the competition, some “no data” questions asked the students to be daunted and unable to start. In fact, when answering such questions, as long as we pay attention to mining the implicit conditional information of the topic, combined with the relevant definition, nature, graph structure, etc., we can “dig out” the number in the “no data” evaluation question. Here are some of the “digging methods.”