問題詳情

【題組】50. How many days does the moon take to complete a full cycle from New Moon to New Moon?
(A) 27.3
(B) 30
(C) 52
(D) 29.5

參考答案

答案：D
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 The moon takes 27.3 days to orbit Earth, but it takes 29.5 days to complete a full cycle from New Moon to New Moon.