Superior conjunction occurs when（）.<br>A:the Sun is at maximum declination north or south<br>B:a planet crosses the external plane of the ecliptic<br>C:the Sun is between the Earth and a planet<br>D:two planets are in line

Superior conjunction occurs when（）.
A:the Sun is at maximum declination north or south
B:a planet crosses the external plane of the ecliptic
C:the Sun is between the Earth and a planet
D:two planets are in line

出自：海船船员证

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