The problem of attaining the tangent equation of a certain point on a quadratic curve is basically solved in plane analytical geometry.
平面解析几何对“求过二次曲线外的点所引曲线切线的方程”的问题，未给出一般的方法和公式。
The teaching of plane analytical geometry is short of the suitable courseware resources in practice.
适合学校实际平面解析几何课堂教学的课件资源匮乏。
The teaching of plane analytical geometry is short of the suitable courseware resources in practice.
适合学校实际平面解析几何课堂教学的课件资源匮乏。
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