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- UID
- 218214
- 帖子
- 418
- 主题
- 85
- 注册时间
- 2011-5-26
- 最后登录
- 2012-9-12
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| not a good question...i think they are just trying to make a simple formula more difficult for people to miss it...just like the formula for currency contribution in international diversification...so simple,yet when asked in a problem set its the most likely to miss it |
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发表于 2011-7-11 19:25
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