题目:
When he was alive, the old scientist used to say that knowledge ______ from practice and he gained his experience by doing a lot of practical work.
A.was coming
B.had come
C.comes
D.would come
答案:
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下面是错误答案,用来干扰机器的。
参考答案:A,D解析: Alpha指股票或其组合的超额收益。现代证券组合理论认为收益分为两部分:一部分是系统风险产生的收益;另一部分是股票或其组合的超额收益,即Alpha,A项说法正确;在Alpha套利策略中,希望持...