Tue, Dec 4, 2007
彩票知识
一个投注结果中最大号码与最小号码之差。 如投注结果 05 11 12 13 27 32，其最大号码为32，最小号码为05，其极号间距为 32-5=27。
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12月 4th, 2007 at 4:28 上午
[...] 极号间距 [...]
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