关于圆锥曲线性质的研究,是初等数学研究的重要组成部分,见诸各大期刊的研究成果林林总总,精彩纷呈.反观研究的目的,我们认为如何让研究成果更好地服务于中学数学教学,才是研究的出发点和归宿.本文拟结合2009年各地高考调研试题,对圆锥曲线的一类性质在考题中的演变作跟踪分析, The research on the nature of the conic is an important part of elementary mathematics research, and the research results of the major journals can be found everywhere, brilliant and colorful.On the contrary, the purpose of the research is how to make the research serve to better serve the mathematics teaching in middle school Is the starting point and destination of the research.This paper intends to combine the 2009 college entrance examination research questions, the evolution of a class of conical curves in the test for tracking analysis,