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tutu
(lazy tutu)
2号和3号属于第一组.
记得我的假设吗,假设第一次称时是左向上右向下, 即此时你已经知道第一组是轻于第二组的.
我回答了你的问题了吗?
(#48337@0)
Last Updated: 2001-4-18
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