我们把以抛物线的焦点为圆心,并与抛物线的准线相切的圆称为抛物线的焦准圆.本文探讨由抛物线与其焦准圆生成的共线点,得到了下列命题,以飨读者.命题1如图1,抛物线的焦点为O,其对称轴为l1,抛物线的通径所在的直线为l2,其准线l交l1于I,抛物线的焦准 We call the circle whose center is the center of the parabola and is tangent to the line of the parabola, and the collinear point that is generated by the parabola and its quasi-circle. The following propositions are given to readers. Proposition 1 Figure 1, the focus of the parabola O, the symmetry axis l1, the path of the parabola where the straight line l2, the l l l l at I, the focus of the parabola