本题目来源于试卷: Physics Unit30: Nuclear Physics and Radioactivity，类别为 Generic Physics
[单选题]
If the half-life of a wn(r-:tliel;c(mu p9 (a zh5 ybdm3: bz .ta+d*;ytp:x d*izrmaterial is 45 years, how much will be left after 100 yearddx 3rb:m+ i.p*zt: *ad;yt bzs?
A. more than 1/2
B. less than 1/2
C. more than 1/4
D. less than 1/4
参考答案: D
本题详细解析:
暂无
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Post time 2024-1-22 01:01:29