本源程序是用几何画板做的数学课件，文件为圆锥曲线共性，供高中数学教师使用。本课件参加自治区课件大赛获一等奖。-source is the Geometer's Sketchpad to do mathematics courseware, documents for the conic common for high school math teachers to use. The courseware participation in the autonomous courseware won the contest.