我们在单元测验或考试中 ,总会出现一些错误 ,究其原因主要有两类 :一是基础不扎实 ,缺乏解题应有的知识基础和解题的基本技能 ;二是思维不灵活 ,思考问题不严谨 .出现错解是令人痛心的 ,但应痛定思痛 ,从中得到一些有益的启示 .启示一 :从错解中突破思维定势例 1　使 5ｍＬＡ There are always some errors in the unit quizzes or exams. There are two main reasons for this: First, the foundations are not solid, the basic knowledge of solving problems and the basic skills for solving problems are lacking, and the second is the inflexible thinking. The problem is not rigorous. It is distressing to have a mistake, but we should learn from it and get some useful revelations. Revelation 1: Break through the mindset from the wrong solution 1 Make 5mLA