题文
若向量
,

满足|

|=|

|=|

+

|=1,则

•

的值为( )A.-

B.

C.-1D.1 题型:未知 难度:其他题型
答案
A解析
该题暂无解析
考点
据考高分专家说,试题“若向量,满足.....”主要考查你对 [向量模的计算 ]考点的理解。
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