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Gaokao Physics Practice Question

由于通讯和广播等方面的需要, 许多国家发射了地球同步轨道卫星, 这些卫星的

  1. A.质量可以不同
  2. B.轨道半径可以不同
  3. C.轨道平面可以不同
  4. D.速率可以不同

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