(  )的证券构建多样化的证券组合,组合的总体方差就会得到改善,这就是通常所说的风险分散原理。

(  )的证券构建多样化的证券组合,组合的总体方差就会得到改善,这就是通常所说的风险分散原理。

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目前,在我国承担基金份额注册登记工作的主要有(  )。

目前,在我国承担基金份额注册登记工作的主要有(  )。

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Sheppard and Rix proposed that older workers remaining in th

Sheppard and Rix proposed that older workers remaining in the orkplace__________

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Because of the noise outside, Nancy had great difficulty ___

Because of the noise outside, Nancy had great difficulty __________________ (集中注

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