众所周知,圆锥曲线,特别是直线与圆锥曲线的综合问题,是支撑高中数学知识体系的重点内容,因而高考命题一直用高于教学课时的比例来考查.同时圆锥曲线问题的解决具有入口宽、方法灵活多样等特点,用不同的解题途径,其运算量就有繁简之分,繁琐的运算就会出错或潜在失分(即使算对了 As we all know, the conical curve, especially the comprehensive problem of the straight line and the conic curve, is the key content supporting the high school mathematics knowledge system. Therefore, the college entrance examination proposition has always been examined with higher proportion than the teaching hours. Meanwhile, the solution of the conic curve problem has a wide entrance method. Flexible and diverse features, with different ways to solve problems, the computational complexity will be simple and complex, tedious operations will be wrong or potential points (even if it is correct