线面平行性质定理的基本内容是：共面不相交的两条直线必定平行，当中的“共面”是直接给出的，而“不相交”则由“线面平行”来间接确定．所有的教学设计或思路启发都应该抓住“共面”、“不相交”这两个核心要点来展开．徐光考、车正道两教师的课例（以下简称“新思路”）， The basic content of the line surface parallel nature theorem is that the two lines that are coplanar and disjoint must be parallel, and the “coplanarity” is directly given, while the “disjoint” is determined indirectly by “line surface parallel”. All instructional designs or ideas should be inspired by the two core points of “coplanarity” and “disjointness”. Xu Guangkao and Che Zhengdao’s lesson examples (hereinafter referred to as “new ideas”),