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行车 ⑤視星等同為5等星的甲、乙兩顆恆星,已知甲的絕對星等為3等星,其與地球的距 無線心 (E)紅色的參宿四。 敬 Ba 回】 C 離為乙距離的10倍,則乙恆星的絕對星等為多少? (A)-7 (B)-2 (C)8 (D13 (E103。 ju 甲 10 IE
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