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教师通过对问题结构的分析,让学生充分认识如何变式,变式的总体方向和思路是什么,变式前后的问题之间有什么关联关系。
Teachers through the analysis of the structure of the problem, so that students fully understand how to change, the general direction of the change and ideas is what, before and after the variant of the relationship between the problems.