直线与圆锥曲线的位置关系的问题一直是高考命题的热点,相关方面的解题与研究不胜枚举,然而最近从全国各地的模拟试题中涌现出一类圆锥曲线与圆相互结合的题型使人眼前一亮,从学生答题的情况来看,非常不理想,其主要的问题是不知如何利用好圆锥曲线的定义和圆的切线性质来为解题寻找突破口,为便于说明问题,现列举几例,供参考. The relationship between the position of the straight line and the conic has always been the focus of the college entrance examination proposition, the related aspects of the problem-solving and research are numerous, however, recently from all over the country simulated test questions emerged in a class of conic curves and circular combination of questions People shines, from the students answer the situation, very unsatisfactory, the main problem is I do not know how to make good use of the definition of conic and circular tangent nature to find a solution to the problem of a breakthrough, in order to illustrate the problem, For example, for reference.