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已知,直线与直线互相垂直,则的 最小值等于 ( ) A 1 B 2 C 2 D...

 已知6ec8aac122bd4f6e,直线6ec8aac122bd4f6e与直线6ec8aac122bd4f6e互相垂直,则6ec8aac122bd4f6e

最小值等于                                                           (    )

A 1                  B 2                C  2             D 2错误!未定义书签。

 

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