题目内容：
设α=i+2j+3k，β=i-3j-2k，与α、β都垂直的单位向量为（ ）。
A．
B．
C．
D．
参考答案：
答案解析：
单选题：设α=i+2j+3k，β=i-3j-2k，与α、β都垂直的单位向量为（ ）。
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B．
C．
D．
B．
C．
D．
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