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【单选题】

解析空中三角测量的精度指标包括定向精度和( )。

A.
单位中误差
B.
定向中误差
C.
控制点残差
D.
加密点中误差
参考答案:
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.