题目：
独立平面直角坐标系中的原点一般设在（）。
A.测区东北角
B.测区东南角
C.测区西南角
D.测区西北角
答案：
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参考答案：C
独立平面直角坐标系中的原点一般设在（）。A.测区东北角 B.测区东南角 C.测区西南
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