近几年来,最小值问题成为中考命题的热点,其中有些问题的解决常用构建轴对称模型的方法·在现行教材“轴对称”一节中有一例题:如图1,在直线l同侧有两点A、B,在直线l上求作一点其作P法使如PA图+2P:B作最点小A·关于直线l的对称 In recent years, the minimum problem has become a hot topic in the examination topics. Some of these problems are solved by the method of constructing an axisymmetric model. There is an example in the “Axisymmetric” section of the current textbook: as shown in Figure 1, there are two on the same side of the straight line l. Point A, B, on the line l as a point for its P method such as PA map +2 P: B for the smallest point A, on the symmetry of the line l