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seagal

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发表于 2010-12-20 02:02 | 显示全部帖子
By Ray Kelly who makes his living as a trader. He has been involved in the securities business for more than 30 years and was one of the founding members of the Chicago Board Options Exchange.

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Brainteaser 发表于 2010-12-17 13:38

牛牛也要大声叫

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