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测量竖直角时,采用盘左、盘右观测,其目的之一是可以消除( )误差的影响。

A、对中;

B、视准轴不垂直于横轴;

C、整平

D、指标差

时间：2021-07-18 13:47 关键词：土木工程高起本测量学 2019级第5学期期末考试工程测量技术高起专测绘学基础期末考试

答案解析

D
D

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