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做习题是学好自然科学、巩固课本知识不可缺少的一个环节,但做习题并不是越多越好,而应该是少而精,讲究质量,杜绝题海战。做习题的目的是通过习题联系实际,扩大知识面,加深对基础知识的理解和运用,因此在作习题过程中要求学生对题目进行分析,了解这一题目这样出的目的、意义何在?考查的是哪些知识点?若把题目稍做更改,情况又如何?基于上述原因,在实际教学中可采用同类变式、一题多变的形式,培养学生的分析能力和解决问题的能力。
Doing exercises is an indispensable part of learning the natural sciences and consolidating textbook knowledge. However, it is not always better to do exercises. Instead, it should be less and more refined, pay attention to quality, and eliminate naval attacks. The purpose of doing exercises is to combine the exercises with the actual situation, expand the knowledge, and deepen the understanding and application of the basic knowledge. Therefore, in the process of doing exercises, students are required to analyze the topics and understand the purpose and significance of this topic. What are the points of knowledge? If you change the subject slightly, how is the situation? Based on the above reasons, in the actual teaching can use the same variants, a variety of forms, to cultivate students’ analytical skills and ability to solve problems.