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有些题表面看来,似乎很难找到解题的突破口,若能借助轴对称方法去解,则可使问题获得简捷明快的解答.下面举例说明.
Some questions may seem difficult to find a breakthrough in solving problems, if you can use axial symmetry to solve, you can get a simple and clear answer to the problem below an example.