【单选题】
某导线全长620m,纵横坐标增量闭合差分别为<img width="162" height="19" src="data:image/png;base64,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"/>,则导线全长相对闭合差为( )
【单选题】
在( )为半径的范围内进行距离测量,可以把水准面当作水平面,可不考虑地球曲率对距离的影 响
【单选题】
沉降观测时水准基点和观测点之间的距离一般应在米范围内,一般沉降点是均匀布置的,距离一般为米。
【单选题】
在测量平面直角坐标系中,y轴表示什么方向?()
【单选题】
精密水准仪必须有光学测微器装置,借以精密测定小于水准标尺最小分划线间格值的尾数,从而提高在水准标尺上的读数精度。一般精密水准仪的光学测微器可以估读到()mm。
【单选题】
整理水准测量数据时,计算检核所依据的的基本公式是()