题目内容
(请给出正确答案)
[主观题]
Planet "Y" orbits the Sun in six months. AB is four times the distance of CD and moreover
it turns out that planet X travels at haft the speed of planet Y. How long does Planet "X" take to orbit the Sun?
A.8 years.
B.6 years.
C.4 years.
D.2 years.
提问人:网友crododile
发布时间:2022-01-07