問題詳情
38. 有一放射性同位素其半衰期為 56.6 天，請問從某個時刻算起經過 449 天後此同位素剩下的比例為
(A) 2.1✖10-2
(B) 3.2✖10-6
(C) 1.00
(D) 4.1✖10-3
參考答案
答案：B
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
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