1.本单元知识网络2.重点、难点、热点分析重点知识:圆锥曲线的两种定义、标准方程、图形和简单几何性质以及参数a,b,c,p,e的几何意义;直线与圆锥曲线的位置关系.重点思想:数形结合的思想;函数方程的思想;分类讨论的思想;运动变化的思想.重点方法:坐标法;待定系数法;配方法;韦达 1. The Unit Knowledge Network 2. Highlights, Difficulties, Hot Spots Analysis Key Knowledge: Two definitions of the conic section, standard equations, figures and simple geometric properties, and the geometric meaning of the parameters a, b, c, p, e; straight lines and cones The positional relationship of curves. Key ideas: the idea of ​​combination of numbers and shapes; the idea of ​​function equations; the idea of ​​classification and discussion; the idea of ​​motion change. Key methods: coordinate method; undetermined coefficient method; matching method;