题文

是平面直角坐标系(坐标原点为O)内分别与x轴、y轴正方向相同的两个单位向量,且

则△OAB的面积等于( )A.15B.10C.7.5D.5 题型:未知 难度:其他题型
答案
D解析
该题暂无解析
考点
据考高分专家说,试题“是平面直角坐.....”主要考查你对 [向量数量积的运算 ]考点的理解。
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