本题目来源于试卷: Physics Unit26: Special Theory of Relativity，类别为 国际高中通用物理
[单选题]
A set of twins, Andrea and Couzrecybgt -l 7 /t3x7+h79ojx irtney, are initially 10 yzaf6+a833 vizc- rfh mears old. While Courtney remains on Earth, Andrea rides on a space ship which travels away from Earth at azih8+6a- f 3cfamvzr 3 speed of 0.6c for five years (as measured by Courtney), then turns around and comes back at 0.6c. When Andrea returns, Courtney is 20 years old. How old is Andrea upon her return?
A. $10 \; years$
B. $12 \; years$
C. $18 \; years$
D. $20 \; years$
参考答案: C
本题详细解析:
暂无
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