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怎样才能称出地球的质量？卡文迪许拿出扭秤，有趣的现象发生了
地球到底有多重？关于地球的形状，从开始的天圆地方到后来的球体，人类进行了很久的探索，1522年 麦哲伦的船队成功实现环球航行，证实了球体的猜想，于是人们又开始好奇，地球到底有多重呢？
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