在每年的高考中,线线、线面、面面平行的性质和判定是考查的重点之一,线面平行又是平行的重要题型.处理线面平行问题要注意线线、线面、面面的相互转化,采用辅助线(面)是证线面平行的关键.欲证线面平行,先证线线平行,欲证线线平行,可先证线面平行,反复用直线与平面平行的判定、性质定理,在同一题中也经常用到.本文从以往学生的备考题中的易错题出发,就线面平行的问题提出若干典型考题的解决 In the annual college entrance examination, the line line, line surface, surface parallel to the nature and determination is one of the key points of examination, line parallel and parallel is an important problem.When dealing with line parallel problem should pay attention to line, line surface, The mutual transformation of the surface, the use of auxiliary lines (surface) is the key to the parallel surface of the witness line. To witness the surface parallel to the first witness line parallel, to prove the line parallel, can be witnessed line parallel, repeated with a straight line and plane Parallel judgments, the nature of the theorem, is also often used in the same question.This article from the previous students in the pro-test questions of the error-prone starting line of parallel questions to put forward a number of typical test questions to solve