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近年来,名目繁多的习题浩如烟海,如不加选择地交给学生,不仅学生,而且连老师自己也会被题海淹没。笔者认为,除对收集到的大量题目归档分类、过滤筛选外,还应强调的是:要重视对课本题目的举一反三作用。本文介绍笔者所作的一点尝试。一、多对例题分析变换高一课本有这样一道例题:设 M 是某天体的质量,m 是它的一个
In recent years, there have been many kinds of exercisers in a myriad of subjects. If you give them to students indiscriminately, not only the students but also the teachers themselves will be submerged. The author believes that, in addition to filing a large number of topics to be classified, filtered and screened, it should also be emphasized that: We must pay attention to the effects of textbooks. This article describes the author’s attempt. One, many examples of analysis of the transformation of high school textbooks have such an example: Let M is the quality of a celestial body, m is one of it