1(没图,请谅解)在长为490米的环行跑道上,A,B,两点之间的跑道长50米,甲,乙两人同时从A,B,两点出发反方向奔跑(不跑50米,路程未知),两人相遇后,乙立刻转身与甲同方向跑,同时甲把速度提高
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![1(没图,请谅解)在长为490米的环行跑道上,A,B,两点之间的跑道长50米,甲,乙两人同时从A,B,两点出发反方向奔跑(不跑50米,路程未知),两人相遇后,乙立刻转身与甲同方向跑,同时甲把速度提高](/uploads/image/z/5244585-33-5.jpg?t=1%EF%BC%88%E6%B2%A1%E5%9B%BE%2C%E8%AF%B7%E8%B0%85%E8%A7%A3%EF%BC%89%E5%9C%A8%E9%95%BF%E4%B8%BA490%E7%B1%B3%E7%9A%84%E7%8E%AF%E8%A1%8C%E8%B7%91%E9%81%93%E4%B8%8A%2CA%2CB%2C%E4%B8%A4%E7%82%B9%E4%B9%8B%E9%97%B4%E7%9A%84%E8%B7%91%E9%81%93%E9%95%BF50%E7%B1%B3%2C%E7%94%B2%2C%E4%B9%99%E4%B8%A4%E4%BA%BA%E5%90%8C%E6%97%B6%E4%BB%8EA%2CB%2C%E4%B8%A4%E7%82%B9%E5%87%BA%E5%8F%91%E5%8F%8D%E6%96%B9%E5%90%91%E5%A5%94%E8%B7%91%EF%BC%88%E4%B8%8D%E8%B7%9150%E7%B1%B3%2C%E8%B7%AF%E7%A8%8B%E6%9C%AA%E7%9F%A5%EF%BC%89%2C%E4%B8%A4%E4%BA%BA%E7%9B%B8%E9%81%87%E5%90%8E%2C%E4%B9%99%E7%AB%8B%E5%88%BB%E8%BD%AC%E8%BA%AB%E4%B8%8E%E7%94%B2%E5%90%8C%E6%96%B9%E5%90%91%E8%B7%91%2C%E5%90%8C%E6%97%B6%E7%94%B2%E6%8A%8A%E9%80%9F%E5%BA%A6%E6%8F%90%E9%AB%98)
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