[复习说明 ]空间中的距离作为刻画空间三元素 (点、直线、平面 )之间相对位置的重要参量之一(另一参量为空间角 ) ,是高考中考查考生立体几何知识的一个热点 .在近 5年的高考中 ,涉及到空间距离的试题年年都有 ,所以在复习时要引起重视 .本专题的重点是求线面距离与点面距离 ,? [Review Instructions] The distance in space is one of the important parameters that characterize the relative position of three elements (points, lines, and planes) in space (another parameter is the spatial angle). It is a hot spot in the college entrance examination to examine examinee’s knowledge of solid geometry. In the recent five years of college entrance examinations, questions involving spatial distances exist year after year, so it is important to pay attention during the review. The focus of this topic is to find the distance between the line surface and the point surface.