一、概述高考立体几何始终把空间直线与直线、直线与平面、平面与平面的平行和垂直的性质及判定,线面间的角与距离的计算作为考查的重点,尤其以多面体为载体的线面位置关系的论证,更是年年反复进行考查,在难度上也始终以中等题为主,通过证明与计算相结合加以考查. I. Overview The college entrance examination’s three-dimensional geometry always takes the parallel and perpendicular nature and determination of spatial lines and straight lines, straight lines and planes, planes and planes, and the calculation of angles and distances between line planes as the focus of examination, especially in the case of polyhedron-supported lines. The argumentation of the relationship between the surface and the position is repeatedly examined every year. The difficulty is always dominated by the intermediate question, and it is examined through the combination of the proof and the calculation.