問題詳情
6. 附圖為放射性元素碳 14 的衰變曲線，其半衰期約為 5730 年，某一岩石中碳 14 衰變為原來的 
，則此岩石在距今約多少年前形成？ 
(A)45000
(B)17000
(C)57000
(D)87000
，則此岩石在距今約多少年前形成？ (A)45000
(B)17000
(C)57000
(D)87000
參考答案
答案：B
難度：適中0.545455
統計：A(1),B(6),C(2),D(1),E(0)
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