Physics Unit31: Nuclear Energy and Radiation (id: aa5a1f5b1)

本题目来源于试卷: Physics Unit31: Nuclear Energy and Radiation，类别为 通用国际物理

[单选题]
What is necessary to sto x rl )ojajk-,ryq-.i(5spv 3pp v 7yaokfe;t3ako n1.s7if)z , beta particles?

A. air alone
B. paper
C. metal foil
D. thick metal


参考答案:  C


本题详细解析: 暂无

微信扫一扫，分享更方便