The analysis and summary, confirm is application and compare it with the traditional Internet-aiding pointconic teaching.
第三部分是分析总结，确定其适用性，并和传统的多媒体辅助圆锥曲线教学进行了比较。
2
A study on the method of drawing conic normal lines through a given point outside the conic.
本文就过圆锥曲线外的点作其法线的方法进行研究。
3
Thus, we give a make-graph method of conic section on plane with arbitrary point as foci, arbitrary line as directrices and arbitrary positive number as eccentricity.