1.两只蜗牛甲乙分别从一根长杆的两端同时出发相向而爬.甲蜗牛每小时爬5咪,乙蜗牛每小时爬4咪.相遇后继续以原速向前爬行,各自到达两段后,立即返回,这样不断往返爬行,他们第二次相遇地
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![1.两只蜗牛甲乙分别从一根长杆的两端同时出发相向而爬.甲蜗牛每小时爬5咪,乙蜗牛每小时爬4咪.相遇后继续以原速向前爬行,各自到达两段后,立即返回,这样不断往返爬行,他们第二次相遇地](/uploads/image/z/3135543-15-3.jpg?t=1.%E4%B8%A4%E5%8F%AA%E8%9C%97%E7%89%9B%E7%94%B2%E4%B9%99%E5%88%86%E5%88%AB%E4%BB%8E%E4%B8%80%E6%A0%B9%E9%95%BF%E6%9D%86%E7%9A%84%E4%B8%A4%E7%AB%AF%E5%90%8C%E6%97%B6%E5%87%BA%E5%8F%91%E7%9B%B8%E5%90%91%E8%80%8C%E7%88%AC.%E7%94%B2%E8%9C%97%E7%89%9B%E6%AF%8F%E5%B0%8F%E6%97%B6%E7%88%AC5%E5%92%AA%2C%E4%B9%99%E8%9C%97%E7%89%9B%E6%AF%8F%E5%B0%8F%E6%97%B6%E7%88%AC4%E5%92%AA.%E7%9B%B8%E9%81%87%E5%90%8E%E7%BB%A7%E7%BB%AD%E4%BB%A5%E5%8E%9F%E9%80%9F%E5%90%91%E5%89%8D%E7%88%AC%E8%A1%8C%2C%E5%90%84%E8%87%AA%E5%88%B0%E8%BE%BE%E4%B8%A4%E6%AE%B5%E5%90%8E%2C%E7%AB%8B%E5%8D%B3%E8%BF%94%E5%9B%9E%2C%E8%BF%99%E6%A0%B7%E4%B8%8D%E6%96%AD%E5%BE%80%E8%BF%94%E7%88%AC%E8%A1%8C%2C%E4%BB%96%E4%BB%AC%E7%AC%AC%E4%BA%8C%E6%AC%A1%E7%9B%B8%E9%81%87%E5%9C%B0)
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