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【单选题】

解析空中三角测量的三种方法中,所求未知数非真正的原始观测值,故彼此不独立,模型最不严密的方法是()

A.
航带法
B.
独立模型法
C.
光束法
D.
区域网法
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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.