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  3. The purpose of the economists’ research at the University of Iowa is to What can be inferred from the fourth paragraph?

The purpose of the economists’ research at the University of Iowa is to What can be inferred from the fourth paragraph?

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问题 The purpose of the economists’ research at the University of Iowa is to
What can be inferred from the fourth paragraph?
选项 A、The physicians are learning to invest in the stock market.
B、The study is carried out in the form of stock investment.
C、Dr. Polgreen is experienced in stock investment.
D、All the participants are rewarded with 100 dollars.
答案B
解析 推理判断题。第四段首句指出在研究过程中，Dr. Polgreen and his colleagues给爱荷华州60位医生和护士每人100 "flu dollars"。接下来具体解释他们如何用"flu dollars"进行操作：提前购买或出售按CDC地图颜色标志的股票。并以一名医生的操作方法为例进行说明。由此可以推断出答案选项描述的结论。从本段可以看出，这里并非指真正的股票市场，只不过模拟股票操作方法对流感进行预测；虽然Polgreen模拟股票操作进行研究，但他是否精通股票投资不得而知；从首句可以看出100 "flu dollars"为虚拟股市投资本金，并非真正的美元。
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