2. 外语
  3. Why do we measure the distance in light-years instead of miles? If a stone moved at the speed of light, it ______.

Why do we measure the distance in light-years instead of miles? If a stone moved at the speed of light, it ______.

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问题 Why do we measure the distance in light-years instead of miles?
If a stone moved at the speed of light, it ______.
选项 A、would weigh twice more than it is motionless
B、would weigh as much as it is on earth
C、would weigh less than it is on earth
D、would have no weight at all
答案A
解析 细节题。可从第三段第二、三句直接摄取答案。at rest与motionless同义。
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