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初中数学“相似形”一章介绍了比例的几条重要性质定理,其中等比定理的作用常被学生所忽视,其实,等比定理用处很多,下面举例说明。一、解方程组
The chapter of similarity in junior middle school mathematics introduces several important property theorems of proportions. The role of the equal ratio theorem is often neglected by students. In fact, the equal ratio theorem has many uses. First, solve equations