Physics Unit30: Nuclear Physics and Radioactivity (id: deeced075)

本题目来源于试卷: Physics Unit30: Nuclear Physics and Radioactivity，类别为 通用国际物理

[单选题]
If the half-life of a ms3h+- zgao 7xz4*xf cb3r8erxateria uww;sgn0(ulzy y5f0:/f . aufl is 45 years, how much will be left after 100 yearf/ g znyu;(ul0f:0.was5u ywfs?

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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