Physics Unit30: Nuclear Physics and Radioactivity (id: 79fdc2a90)

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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]
Gamma rays can penetrp,q . t2,jl 8zt/; gaep:vqipmv ) kiq 0gt9su9xex(pub0u)r* ate

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


参考答案:  D


本题详细解析: 暂无