定义圆锥曲线准线与其对称轴的交点叫做准点,经过准点的直线被圆锥曲线截得的弦叫做准点弦.准点、准点弦和焦点、焦点弦一样,具有许多性质,文[1]已介绍了与其相关的几个定理,作为文[1]的补充,本文再介绍如下几个定理.定理1F是横向型圆锥曲线焦点,E是与焦点F相应的准线和对称轴 The intersection point between the definition of the conic curve and its axis of symmetry is called quasi-point. The quasi-point straight line is the quasi-point chord. The quasi-point, the quasi-point chord are the same as the focus and the focus chord. It has been described in [1]. Several theorems related to it, as a supplement to [1], introduce the following theorems. Theorem 1F is the horizontal conic focus, and E is the directivity and symmetry axis corresponding to the focal point F.