近年来,一类“改为或换成”的几何问题倍受命题人青睐,这类试题以问题串呈现,其特点是探究方法类似,结论的形式相同或相近.解答此类问题的基本方法是,首先给出基本问题的解答,并从中体会、总结解题思想与方法,然后运用其思想方法去解答它的变式题.下面撷取几例中考题解析,供读者参考. In recent years, a class of “to or replaced by ” geometric problems much favor proposition people, such questions are presented in the question string, which is characterized by similar methods of inquiry, the conclusions of the same or similar forms. The basic method is, first of all, given the basic problems of the answer, and from experience, summarize the problem-solving ideas and methods, and then use their method of thinking to answer its variant questions below to retrieve a few examples of test questions for readers reference.