题文
设|a|=1,|b|=2,且a、b夹角为
,则|2a+b|等于( )A.2B.4C.12D.2

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“设|a|=1.....”主要考查你对 [向量数量积的运算 ]考点的理解。
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