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 material is 45 years, how mrsnbd2a2w(+ab6j1x.ajl:3d yy3g5 pxuq en4uch will be left af v0/niic3 w;tster 100 years?;winv /i30t cs

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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