高考试卷中,立体几何侧重于直线与直线、直线与平面、平面与平面的各种位置关系的考查,考查的立足点放在空间图形上,突出对空间观念和空间想象能力的考查.本文以2012年高考题为例对此作一剖析.一、线面位置关系证明空间线面平行或垂直需注意:①由已知想性质,由求证想判定,即分析法与综合 Examination papers, the three-dimensional geometry focuses on the linear and linear, linear and plane, plane and plane of the various positional relationship examination, examination of the foothold on the space graphics, highlighting the concept of space and space imagination ability test.This paper 2012 college entrance examination questions as an example of this analysis.First, the location of the line surface to prove the space line parallel or vertical attention should be paid: ① known by nature, from the evidence that the decision, that analysis and synthesis