8．地面两点间的水平距离是指

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8．地面两点间的水平距离是指

A.
该二地面点间连线的长度

B.
该二地面点之连线投影于竖直面上的线段长度

C.
该二地面点之连线铅垂投影于水平面上的线段长度

D.
过该二地面点的铅垂线之间的距离

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建筑测量

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