如图,梯形CDFE在平面直角坐标系内,点C在y轴上,点E,D,F的坐标分别为i(13,12)(﹣4,0)(18,0).在x轴上一点A从原点O出发,以每秒1个单位的速度向F点移动;同时点B则从C点出发沿线段CE,EF以每秒1.
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![如图,梯形CDFE在平面直角坐标系内,点C在y轴上,点E,D,F的坐标分别为i(13,12)(﹣4,0)(18,0).在x轴上一点A从原点O出发,以每秒1个单位的速度向F点移动;同时点B则从C点出发沿线段CE,EF以每秒1.](/uploads/image/z/14675419-19-9.jpg?t=%E5%A6%82%E5%9B%BE%2C%E6%A2%AF%E5%BD%A2CDFE%E5%9C%A8%E5%B9%B3%E9%9D%A2%E7%9B%B4%E8%A7%92%E5%9D%90%E6%A0%87%E7%B3%BB%E5%86%85%2C%E7%82%B9C%E5%9C%A8y%E8%BD%B4%E4%B8%8A%2C%E7%82%B9E%2CD%2CF%E7%9A%84%E5%9D%90%E6%A0%87%E5%88%86%E5%88%AB%E4%B8%BAi%EF%BC%8813%2C12%EF%BC%89%EF%BC%88%EF%B9%A34%2C0%EF%BC%89%EF%BC%8818%2C0%EF%BC%89.%E5%9C%A8x%E8%BD%B4%E4%B8%8A%E4%B8%80%E7%82%B9A%E4%BB%8E%E5%8E%9F%E7%82%B9O%E5%87%BA%E5%8F%91%2C%E4%BB%A5%E6%AF%8F%E7%A7%921%E4%B8%AA%E5%8D%95%E4%BD%8D%E7%9A%84%E9%80%9F%E5%BA%A6%E5%90%91F%E7%82%B9%E7%A7%BB%E5%8A%A8%EF%BC%9B%E5%90%8C%E6%97%B6%E7%82%B9B%E5%88%99%E4%BB%8EC%E7%82%B9%E5%87%BA%E5%8F%91%E6%B2%BF%E7%BA%BF%E6%AE%B5CE%2CEF%E4%BB%A5%E6%AF%8F%E7%A7%921.)
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