题文
平面向量
与

的夹角为

,

,

,则

=( )A.

B.

C.4D.12 题型:未知 难度:其他题型
答案
B解析

故选B.
考点
据考高分专家说,试题“平面向量与的夹角为,,,则=( )A.B.....”主要考查你对 [向量数量积的含义及几何意义 ]考点的理解。
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