题文
在△ABC中,已知
,则∠B等于
A.60°
B.120°
C.30°
D.150° 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“在△ABC中.....”主要考查你对 [向量数量积的运算 ]考点的理解。
上一篇 I spend a lot of time backpacking and hiking the outdoors and there are two piec
下一篇 As a young social worker in a New York City psychiatric clinic, I was asked to s