【考情分析】空间角和距离问题,是高考命题的重点内容,几乎每年必考.在选择题、填空题中,线线角主要考查线段的平移,线面角关键是寻求直线在平面上的射影,二面角的难点是准确作出平面角;在解答题中,多数问题用空间向量来解决,需用到方程、三角函数、平面几何等知识,属于中高档题.【复习要点】 In the multiple-choice questions, fill in the blank, line angle mainly to examine the translation of the line segment, line angle is the key to seeking a straight line in the plane Of the projection, the difficulty of the dihedral is to accurately make a plane angle; in the answer questions, most of the problems with space vector to solve, the need to use equations, trigonometric functions, plane geometry and other knowledge, belongs to the high-grade questions.