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山丘地区的中线测量除标定其中心线的位置外，还应概略确定中线的高程位置，确定高程使用的测量仪器

是()。

A．经纬仪

B．水准仪

C．罗盘仪

D．垂直仪

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第2题

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第3题

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第4题

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第5题

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第6题

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第7题

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第8题

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第10题

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