探索动点的运动规律既是解析几何教学的重点，又是高考考查的热点．然而，传统的“粉笔加黑板”的教学手段，由于难以进行“动态”处理，“动点”只能用黑板上的一个静态的“定点”来表示，导致学生难以形成良好的运动观．加之多数情况下只有在求出动点的轨迹方程后，才能知道 The movement law of exploring the moving point is not only the focus of analytical geometry teaching, but also the hot spot of the college entrance examination. However, the traditional “chalk and blackboard” teaching method is difficult to carry out “dynamic” processing, and the “movement point” can only be represented by a static “fixed point” on the blackboard, resulting in students’ difficulty in forming a good view of movement. In most cases, only after finding the trajectory equation of the moving point can we know