课本中有许多例题,看似平淡,实际上内涵丰富,在复习课中通过对题目的拓展、推广、应用,无疑会助我们一臂之力,达到“知一题,会一片”的效果.所以在复习解题时我们要经常给自己留思考的空间,留拓展的余地,今天我们就以“轴对称思想在求最值中的应用”为例,谈谈习题的变式和拓展.在浙教版八下第二章第一节图形的轴对 There are many examples in the textbook, which seem to be dull and actually rich in content. During the reviewing class, we can undoubtedly help our students to achieve the goal of expanding, promoting and applying them in the review class. When reviewing the problem-solving questions, we often have to give ourselves room for thinking and leave room for expansion. Today, we will take “the application of axisymmetric ideas in seeking the most value” as an example to talk about the variations and expansion of exercises. In the Zhejiang version of the eighth chapter second chapter first section of the graphic axis