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【多选题】

解析空中三角测量的精度指标包括(_____)。

A.
定向精度控制点
B.
残差同名像点点位
C.
中误差定向
D.
中误差属性精度
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参考解析:
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【单选题】It is now almost two years since the European Union decided to go ahead with plans to launch a satellite-navigation network to rival America’s existing Global Positioning System (GPS). For much of thi...

A.
Using of various signals for communication.
B.
Writing message or information in secret code.
C.
Automatic ally operated positioning system.
D.
Accuracy checking device.