Physics Unit30: Nuclear Physics and Radioactivity (id: e919459e6)

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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]
An a particle is also knop bm.a*9x9t1tjk.o/d; gbb vk wn; 8sg0f x2vemu as

A. an electron.
B. a positron.
C. a helium nucleus.
D. a photon.


参考答案:  C


本题详细解析: 暂无