Physics Unit30: Nuclear Physics and Radioactivity (id: b3e34e9fe)

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本题目来源于试卷: Physics Unit30: Nuclear Physics and Radioactivity，类别为 Generic Physics

[单选题]
Alpha rays can penetra p rld:v4 2rs6ef*n,glwfj-m2teao1tclr9y f *)2( jxaq

A. air only.
B. a piece of paper.
C. several millimeters of aluminum.
D. several centimeters of lead.


参考答案:  B


本题详细解析: 暂无