2589| 17
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在地球表面垂直上拋小球落回原點(diǎn)嗎? |
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點(diǎn)評(píng)
你準(zhǔn)備扔多高?扔出第二宇宙速度嗎哈哈哈
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點(diǎn)評(píng)
那得多扔幾次,普通人沒(méi)訓(xùn)練過(guò),扔出去的方向不直。
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