题文
已知向量
满足

,则

( ).A.0B.1C.2D.

.Co 题型:未知 难度:其他题型
答案
D.解析
由已知有

,所以


.

,向量的数量积运算.
考点
据考高分专家说,试题“已知向量满足,则().A.0B.1C.2.....”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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