数学课程标准指出:“有效的数学学习活动不能单纯地依赖模仿与记忆,动手实践,自主探索与合作交流是学生学习数学的重要方式.”初三复习时间紧,内容多,要求我们要精选例题、习题,可以灵活地进行一题多解,一题多证,以点代面、举一反三,探索思想方法,总结解题规律,从而避免题海战术,在短时间内收到最佳的复习效果.题目如图,已知AD是△ABC的中线,E是AD的中点,F是BE的长线与AC交点. Mathematical curriculum standards: “Effective mathematics learning activities can not simply rely on imitation and memory, hands-on practice, independent exploration and cooperation and exchange is an important way for students to learn mathematics.” "The third review of tight time and content, and asked us to Selected examples, exercises, you can flexibly conduct a multi-solution, a question and more evidence to point on behalf of the surface, give top priority to explore ideas and methods to sum up the problem-solving law, in order to avoid the sea tactics, received in a short time the best The subject is shown in the figure, it is known that AD is the center line of ABC, E is the midpoint of AD, and F is the intersection of the long line of BE and AC.