阶段,1,阶段,2,阶段,3,学业分层测评,1/40,2/40,3/40,大小,方向,有向线段,A,B,4/40,起点,大小,5/40,AOB,a,,,b,6/40,a,b,a,b,7/40,8/40,方向向量,方向向量,9/40,10/40,方向向量,a,11/40,12/40,13/40,空间向量相关概念,14/40,15/40,16/40,17/40,18/40,19/40,直线方向向量与平面法向量,20/40,21/40,22/40,23/40,空间向量特征,24/40,25/40,26/40,27/40,28/40,29/40,30/40,31/40,32/40,33/40,34/40,35/40,36/40,37/40,38/40,39/40,40/40,