【单选题】【消耗次数：1】
经纬仪测量水平角时，正倒镜瞄准同一方向所读的水平方向值理论上应相差（ ）
①
0°
②
9 0°
③
180°
④
270°
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相关题目
【单选题】
将经纬仪安置于A点且瞄准B点时，水平度盘读数为30°，欲测设45°的水平角值于AB直线的左侧，则水平度盘的读数应为()
①
345°
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【单选题】
将经纬仪安置于A点且瞄准B点时，水平度盘读数为30°，欲测设45°的水平角值于AB直线的左侧，则水平度盘的读数应为（ ）。
①
345°
②
75°
③
165°
④
15°
【单选题】
将经纬仪安置于A点且瞄准B点时，水平度盘读数为30°，欲测设45°的水平角值于 AB直线的左侧，则水平度盘的读数应为？
①
345°
②
75°
③
165°
④
15°
【单选题】
将经纬仪安置于A点且瞄准B点时，水平度盘读数为30°，欲测设45°的水平角值于AB直线的右侧，则水平度盘的读数应为（ ）。
①
345°
②
75°
③
165°
④
15°
【单选题】
将经纬仪安置于A点且瞄准B点时，水平度盘读数为30°，欲测设45°的水平角值于AB直线的右侧，则水平度盘的读数应为（ ）。
①
345°
②
75°
③
165°
④
15°
【单选题】
将经纬仪安置于A点且瞄准B点时，水平度盘读数为30°，欲测设45°的水平角值于 AB直线的左侧，则水平度盘的读数应为？
①
345°
②
75°
③
165°
④
15°
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