题文
平面向量
与

的夹角为60°,

=(1,0),|

|=1,则|

+2

|=( )
A.7B.

C.4D.12 题型:未知 难度:其他题型
答案
B解析
该题暂无解析
考点
据考高分专家说,试题“平面向量与的.....”主要考查你对 [向量数量积的运算 ]考点的理解。
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