您会做几题就回答几题..1.一位少年短跑选手,顺风跑90米用了10秒.在同样的速度下.逆风跑70米 也用了10秒.请问在无风的时候他跑100米要多少秒?2客车和火车同时从甲.乙两地相向开出,客车行完
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![您会做几题就回答几题..1.一位少年短跑选手,顺风跑90米用了10秒.在同样的速度下.逆风跑70米 也用了10秒.请问在无风的时候他跑100米要多少秒?2客车和火车同时从甲.乙两地相向开出,客车行完](/uploads/image/z/565670-38-0.jpg?t=%E6%82%A8%E4%BC%9A%E5%81%9A%E5%87%A0%E9%A2%98%E5%B0%B1%E5%9B%9E%E7%AD%94%E5%87%A0%E9%A2%98..1.%E4%B8%80%E4%BD%8D%E5%B0%91%E5%B9%B4%E7%9F%AD%E8%B7%91%E9%80%89%E6%89%8B%2C%E9%A1%BA%E9%A3%8E%E8%B7%9190%E7%B1%B3%E7%94%A8%E4%BA%8610%E7%A7%92.%E5%9C%A8%E5%90%8C%E6%A0%B7%E7%9A%84%E9%80%9F%E5%BA%A6%E4%B8%8B.%E9%80%86%E9%A3%8E%E8%B7%9170%E7%B1%B3+%E4%B9%9F%E7%94%A8%E4%BA%8610%E7%A7%92.%E8%AF%B7%E9%97%AE%E5%9C%A8%E6%97%A0%E9%A3%8E%E7%9A%84%E6%97%B6%E5%80%99%E4%BB%96%E8%B7%91100%E7%B1%B3%E8%A6%81%E5%A4%9A%E5%B0%91%E7%A7%92%3F2%E5%AE%A2%E8%BD%A6%E5%92%8C%E7%81%AB%E8%BD%A6%E5%90%8C%E6%97%B6%E4%BB%8E%E7%94%B2.%E4%B9%99%E4%B8%A4%E5%9C%B0%E7%9B%B8%E5%90%91%E5%BC%80%E5%87%BA%2C%E5%AE%A2%E8%BD%A6%E8%A1%8C%E5%AE%8C)
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