单选题Which of the following does an astronomical time clock do？（）A Determines the ambient light at night with a photocell.B Calculates sunset and sunrise times based on geographical area.C Determines the start and end of each of the seasons.D Synchronizes t

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单选题

Which of the following does an astronomical time clock do？（）

Determines the ambient light at night with a photocell.

Calculates sunset and sunrise times based on geographical area.

Determines the start and end of each of the seasons.

Synchronizes the local time displayed with the official world time.

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单选题Which of the following does an astronomical time clock do？（）A Determines the ambient light at night with a photocell.B Calculates sunset and sunrise times based on geographical area.C Determines the start and end of each of the seasons.D Synchronizes t

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