圆锥曲线教学中，由于几何量受各种因素的影响而变化，导致点、线按不同的方式作运动．传统的教学依靠黑板、粉笔，依赖教师的演示讲解，不仅费时费神、精确度不高，而且难以展示几何图形变化与运动的整体过程．若采用计算机辅助教学（ＣＡＩ），通过光、声、色、像，创设... In the teaching of conical curves, the geometrical quantity is affected by various factors, which causes the points and lines to move in different ways. Traditional teaching relying on blackboards, chalk, and relying on teachers’ presentations not only takes time and effort, is not accurate, and it is difficult to demonstrate the overall process of geometric changes and movements. If computer-assisted instruction (CAI) is used, it is created through light, sound, color, and image...