火箭进入太空后速度会有变化-<artentek>电子书

　　　　

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火箭进入太空后速度会有变化

作者：匡廷云

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火箭是人类探索太空奥秘的重要“武器”，人类一直梦想离开地球，飞向太空。无数次勇敢地尝试，都没有离开过养育自己的摇篮——地球。火箭出现了，人类有了通天的利器。它是如何载着“地球人”的梦想遨游天际的呢？宇航员是如何生活的呢？本书为你揭开火箭身上的种种奥秘。

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