题文
在△ABC中,角A,B,C所对的边分别是a,b,c,已知点D是BC边的中点,且

(a2-ac),则角B=( )。 题型:未知 难度:其他题型
答案

解析
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考点
据考高分专家说,试题“在△ABC中,角A,B,C所.....”主要考查你对 [向量数量积的运算 ]考点的理解。
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