单选题:马科维茨指出,在同一期望收益前提下,最为有效的投资组合是(  )。

题目内容:
马科维茨指出,在同一期望收益前提下,最为有效的投资组合是(  )。 A.高收益
B.低收益
C.高风险
D.低风险

参考答案:
答案解析:

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Just take it easy and_______ us exactly what has happened.

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In the second paragraph, the author mainly discusses_______.

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全球化也正在改变人们的生活方式。

全球化也正在改变人们的生活方式。

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