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【单选题】
三角测量是通过观测相联系三角形内各水平角或边长，并利用已知的
{.XZ}
、方位角和起始点坐标确定其他各三角点水平位置的测量技术和方法。
A.
边长
B.
起始边长
C.
距离
D.
高程
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【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.