用方程解出来就行.十.点.晶.晶、贝.贝.二.人.分.别.从.A、B.两.地.同.时.出.相.向.而.行;10.点.15.贝.贝.追.上.了.一.支.从.A.向.B.的.游.行.队.伍.的.队.于.此.同.时.晶.晶.到.了.游.行.队.伍.的.队.
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![用方程解出来就行.十.点.晶.晶、贝.贝.二.人.分.别.从.A、B.两.地.同.时.出.相.向.而.行;10.点.15.贝.贝.追.上.了.一.支.从.A.向.B.的.游.行.队.伍.的.队.于.此.同.时.晶.晶.到.了.游.行.队.伍.的.队.](/uploads/image/z/1007809-25-9.jpg?t=%E7%94%A8%E6%96%B9%E7%A8%8B%E8%A7%A3%E5%87%BA%E6%9D%A5%E5%B0%B1%E8%A1%8C.%E5%8D%81.%E7%82%B9.%E6%99%B6.%E6%99%B6%E3%80%81%E8%B4%9D.%E8%B4%9D.%E4%BA%8C.%E4%BA%BA.%E5%88%86.%E5%88%AB.%E4%BB%8E.A%E3%80%81B.%E4%B8%A4.%E5%9C%B0.%E5%90%8C.%E6%97%B6.%E5%87%BA.%E7%9B%B8.%E5%90%91.%E8%80%8C.%E8%A1%8C%EF%BC%9B10.%E7%82%B9.15.%E8%B4%9D.%E8%B4%9D.%E8%BF%BD.%E4%B8%8A.%E4%BA%86.%E4%B8%80.%E6%94%AF.%E4%BB%8E.A.%E5%90%91.B.%E7%9A%84.%E6%B8%B8.%E8%A1%8C.%E9%98%9F.%E4%BC%8D.%E7%9A%84.%E9%98%9F.%E4%BA%8E.%E6%AD%A4.%E5%90%8C.%E6%97%B6.%E6%99%B6.%E6%99%B6.%E5%88%B0.%E4%BA%86.%E6%B8%B8.%E8%A1%8C.%E9%98%9F.%E4%BC%8D.%E7%9A%84.%E9%98%9F.)
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