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【单选题】
测站上经纬仪对中是时经纬仪与（ ），整平的目的是使经纬仪（ ）。A.
地面点重合；圆水准器气泡居中
B.
三脚架中一致；基座水平
C.
地面点垂线重合；水平度盘水平
D.
三脚架中一致；圆水准器气泡居中
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