现有1—4厘米的小棒各两根,5—9厘米的小棒各一根,用这些小棒摆平行四边形,共有多少种组合?有序的列出来每根小棒只用一次
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![现有1—4厘米的小棒各两根,5—9厘米的小棒各一根,用这些小棒摆平行四边形,共有多少种组合?有序的列出来每根小棒只用一次](/uploads/image/z/8797407-15-7.jpg?t=%E7%8E%B0%E6%9C%891%E2%80%944%E5%8E%98%E7%B1%B3%E7%9A%84%E5%B0%8F%E6%A3%92%E5%90%84%E4%B8%A4%E6%A0%B9%2C5%E2%80%949%E5%8E%98%E7%B1%B3%E7%9A%84%E5%B0%8F%E6%A3%92%E5%90%84%E4%B8%80%E6%A0%B9%2C%E7%94%A8%E8%BF%99%E4%BA%9B%E5%B0%8F%E6%A3%92%E6%91%86%E5%B9%B3%E8%A1%8C%E5%9B%9B%E8%BE%B9%E5%BD%A2%2C%E5%85%B1%E6%9C%89%E5%A4%9A%E5%B0%91%E7%A7%8D%E7%BB%84%E5%90%88%3F%E6%9C%89%E5%BA%8F%E7%9A%84%E5%88%97%E5%87%BA%E6%9D%A5%E6%AF%8F%E6%A0%B9%E5%B0%8F%E6%A3%92%E5%8F%AA%E7%94%A8%E4%B8%80%E6%AC%A1)
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