Science
Junior High
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想請教這題
36. 如果對北極星進行夜間長時間拍攝,而繞著北極星旋轉的星星畫出長30度的弧線
,請推算拍攝時間為多長?
DB
(A)2分鐘(B)2小時(C)6小時(D)12小時。
360°
:30
12
9
360°
=
300 : 12
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