题文
已知正方形ABCD的边长为a,则
等于( )。 题型:未知 难度:其他题型
答案

解析
该题暂无解析
考点
据考高分专家说,试题“已知正方形ABCD的边长为a.....”主要考查你对 [向量模的计算 ]考点的理解。
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