学生做题后,教师针对学生出现的错误进行有效讲评才能最大限度地挖掘试题应有的效能。试题讲评不应就题论题,而应以题论法,应以典型题目带动相关知识、方法、规律的复习、总结和应用。本文以一道常见的化学试题为例介绍了讲评试题的具体做法。题目:取等物质的量浓度的NaOH溶液两份,每份 Students do the question, the teacher for the students to make an effective assessment of the errors in order to maximize the effectiveness of the questions should be tapped. Questions should not comment on the title, but should be based on the questioning law, should be driven by typical topics related knowledge, methods, laws review, summary and application. In this paper, a common chemical test questions as an example to introduce the specific approach to comment questions. Title: Take two substances such as NaOH solution concentration, each