“温故而知新”.经常温习学过的知识,就会有新的体会.化学复习是化学教学过程中的一个重要环节,是完成教学任务之后的一个系统、完善、深化所学内容的关键环节,是学生掌握知识不可缺少的一个步骤.通过复习,能使学生更加全面地掌握化学的基本知识,掌握解题的基本技巧和基本方法,有利于学生提高分析、解决问题的能力,促使学生主动学习,培养学生的创新精神和实践能力.同时,复习也是对学习基础较差学生的查缺补漏,是他们进一步掌握 “Culpability and new knowledge.” Often learned from the review of knowledge, there will be new experience.Chemical review is an important part of the process of chemistry teaching is a system to complete the teaching tasks, improve, deepen the content The key link is an indispensable step for students to master knowledge.Through review, can make students grasp the basic knowledge of chemistry more comprehensively, grasp the basic skills and basic method of solving problems, help students improve the ability of analyzing and solving problems, Promote students to take the initiative to learn, develop students’ innovative spirit and practical ability.At the same time, the review is also a lack of learning to poor students on the basis of missing, they further grasp