二次根式的大小比较,课本中涉及甚少,而中考和竞赛中却屡次出现,学生往往感到难以下手.为此本文介绍几种常用的技巧方法. The comparison of the size of the secondary roots is rarely involved in the textbooks, but it often occurs in the middle school exams and competitions. Students often find it difficult to start. For this reason, this article introduces several common techniques and techniques.