Physics Unit33: Astrophysics and Cosmology (id: 673a620c3)

本题目来源于试卷: Physics Unit33: Astrophysics and Cosmology，类别为 国际高中通用物理

[单选题]
Estimate the speed of a galaxy thatzj, 9 c pxzt07wl).fd8b:claj,fo2-6ziy kx n is s9 ahj,o v:pf710 billion light-years away.

A. $0.1 \; c$
B. $0.3 \; c$
C. $0.5 \; c$
D. $0.7 \; c$


参考答案:  C


本题详细解析: 暂无

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