当下仍有一些教师不了解或不理解有关圆锥曲线相似的问题,正如文[1]认为,“平面上的任何两条抛物线都是彼此相似的”是一个荒唐的结论,并从4个方面作了论述,企图推翻该结论.文[1]首先类比角引进“曲线角”的概念,有公共端点的两条曲线形成的图形叫做曲线角,这个公共端点叫做曲线角的顶点,这两条曲线叫做曲线角的两边.并指出抛物线可以看作以其顶点为顶点的曲线角,且这个曲线角的大小是由二次项的系数决定的.因为二次项系数不相等,所以曲线 There are still some teachers who do not understand or understand the similarities of conic curves. As the paper [1] thinks, “any two parabola on the plane are similar to each other” is a ridiculous conclusion, and from 4 In the first place, the concept of “angle of curve” is introduced in analogy, and the curve formed by two curves with common endpoint is called curve angle. This common endpoint is called the vertex of curve angle, These two curves are called the two sides of the curve angle, and point out that the parabola can be regarded as the curve angle whose vertex is the vertex, and the size of the curve angle is determined by the coefficient of the quadratic term. Because the coefficients of the two terms are not equal, curve