近几年的高考试题中出现了一类新的题型,就是以立体几何为载体,考查平面解析几何中的轨迹问题.由于这类问题涉及的知识点多,思维方式和常规问题有一定差异,题目的综合性、灵活性比较强,加之同学们对这种形式的题目接触不多,所以难以找到解题的切入 In recent years, a new class of questions has emerged in the high exam questions, that is, using the three-dimensional geometry as a carrier to examine the trajectory problem in the plane analytical geometry. Since there are many knowledge points involved in this type of problem, there are differences in the way of thinking and conventional issues. The comprehensiveness and flexibility of the topics are relatively strong. In addition, the students have little contact with this type of topic, so it is difficult to find a solution to the problem.