27（）
A. place
B. fact
C. form
D. part
下列关于资本资产定价模型的说法中，错误的是( )。
A. 股票的预期收益率与β值线性相关
B. 无风险资产的β值为零
C. 资本资产定价模型仅适用于单个资产，不适用于投资组合
D. 市场组合的β值为1
我国的信托业已经先后经过( )次大规模的清理整顿。
A. 3
B. 4
C. 5
D. 6
From the last sentence of this passage we conclude that （）
A. businesses usually do not pay much for advertisement
B. businessmen know well that advertisement could bring them more profits
C. advertisement could hardly convince people of the value of the goods
D. advertisement usually cost businesses large amounts of money
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