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In an experiment, researchers planted a coin beside half the public telephones in a building. Whenever someone was done using one of the phones, an actor pretended to accidentally drop some papers. Among people who found one of the coins, most helped pick up the papers; but among people using the phone where no coin had been planted, most did not. Researchers concluded that pleasant surprises make people more helpful, at least temporarily. Which of the following, if found in a subsequent survey of the experimental subjects, what most help confirm the researchers’ hypothesis? A The average everyday level of happiness that the helpers reported was higher than that which the non-helpers reported. B Among the subject using the phones where no coin had been planted, many reported pleasant surprises in their telephone conversations. C The coin finders who helped pick up the papers reported much greater satisfaction at finding the coin than did the other coin finders. D Among the subjects using the phones where a coin had been planted, most found the coin. E Among the subjects who did not find a coin, most reported that they were indifferent about finding one.
Palm oil plantations in the Republic of Yaveria have produced more palm oil this year than they can sell. Some plantation managers plan to process their surplus oil into fuel for diesel engines used on their plantations. However, this is unlikely to be a cost-effective use for the surplus, since processing palm oil into a gallon of diesel fuel costs more than the average retail price for a gallon of ordinary diesel fuel in Yaveria. Which of the following, if true, provides the strongest defense of the plantation managers' plan against the criticism? (A) The average annual fuel cost in Yaveria of running a diesel engine is far lower than the corresponding cost for a gasoline engine. (B) Due to declining international demand for palm oil, the price that unprocessed palm oil can bring on the export market is expected to fall drastically over the next few years. (C) Processed palm oil can be mixed with ordinary diesel fuel for use in diesel engines. (D) Most plantations are in remote areas where the cost of bringing in supplies is much higher than in the rest of the country. (E) On most plantations, diesel engines are used not only in trucks but also in generators that supply electricity to the plantations.
参考答案：CD
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发表于 2021-10-8 20:13:41
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