2. 外语
  3. 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

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

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问题 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?
选项 A、8 years.
B、6 years.
C、4 years.
D、2 years.
答案C
解析 由题意可知AB=4CD，故x绕太阳一周的距离为Y的4倍，又planet X travels at half the speed of planet Y，故x绕太阳一周的时间为Y的8倍。Planet Y绕太阳一周的时间为6个月，故planet X绕太阳一周需4年。
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本试题收录于： B类竞赛（英语专业本科专科）题库大学生英语竞赛（NECCS）分类
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大学生英语竞赛（NECCS）

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