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【判断题】
某资产组合的风险收益率为8%，市场组合的平均收益率为10%，无风险收益率为5%，则资产组合的系统风险比较小。A.
正确
B.
错误
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举一反三
【单选题】After school we went to the reading-room to do some reading, only to be told that it .
A.
was decorated
B.
had decorated
C.
had been decorated
D.
was being decorated
【单选题】After school we went to the readingroom to do some reading，only to be told that it ________.(2012·安徽)
A.
was decorated
B.
had decorated
C.
had been decorating
D.
was being decorated
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