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

本题目来源于试卷: Physics Unit33: Astrophysics and Cosmology，类别为 通用国际物理

[单选题]
Estimate the speed of a galaxy that is 10 o;ueyr x .(8,g vw)s5kji4rqy billion/u x:tq ; ybm(ukndwj-v2ei8retn e94h h:.+g 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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