According to the passage, it is difficult to be certain about the distant future of the universe because we ______. What does t

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问题 According to the passage, it is difficult to be certain about the distant future of the universe because we ______.
What does the author see as the function of the universe’s unseen "switches"?

选项 A、They tell us which one of the tracks the universe will use.
B、They enable us to alter the course of the universe.
C、They give us information about the lunar surface.
D、They determine which course the universe will take in the future.

答案D

解析 根据第二段最后一句可知,所谓无形的"转换器"是未来真正的关口,它决定着事物的发展方向。
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