【单选题】【消耗次数：1】
在测量平面直角坐标系中，所用的方位角是（ ）。
①
真方位角
②
假定方位角
③
坐标方位角
④
磁方位角
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坐标方位角
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238°36′24″
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343°50′36″
【单选题】
某直线的坐标方位角为163°50′36″，则其反坐标方位角为（ ）。
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253°50′36″
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