Concerning a celestial observation，the azimuth angle is measured from the principal vertical circle to the（）.<br>A:Greenwich celestial meridian<br>B:hour circle of the body<br>C:local celestial meridian<br>D:vertical circle of the body

Concerning a celestial observation，the azimuth angle is measured from the principal vertical circle to the（）.
A:Greenwich celestial meridian
B:hour circle of the body
C:local celestial meridian
D:vertical circle of the body

出自：海船船员证

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