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  3. In 1924 America’s National Research Council sent two engineers to supervise a series of experiments at a telephone-parts factory

In 1924 America’s National Research Council sent two engineers to supervise a series of experiments at a telephone-parts factory

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问题     In 1924 America’s National Research Council sent two engineers to supervise a series of experiments at a telephone-parts factory called the Hawthorne Plant near Chicago. It hoped they would learn how stop-floor lighting【C1】______workers’ productivity. Instead, the studies ended【C2】______giving their name to the "Hawthorne effect", the extremely influential idea that the very【C3】______of being experimented upon changed subjects’ behavior.
    The idea arose because of the【C4】______behavior of the women in the plant. According to 【C5】______of the experiments, their hourly output rose when lighting was increased, but also when it was dimmed. It did not【C6】______what was done in the experiment;【C7】______something was changed, productivity rose. A(n)【C8】______that they were being experimented upon seemed to be【C9】______to alter workers’ behavior【C10】______itself.
    After several decades, the same data were【C11】______to econometric analysis. Hawthorne experiments has another surprise in store.【C12】______the descriptions on record, no systematic【C13】______was found that levels of productivity were related to changes in lighting.
    It turns out that the peculiar way of conducting the experiments may have led to【C14】______interpretations of what happened.【C15】______, lighting was always changed on a Sunday. When work started again on Monday, output【C16】______rose compared with the previous Saturday and【C17】______to rise for the next couple of days. 【C18】______, a comparison with data for weeks when there was no experimentation showed that output always went up on Mondays. Workers【C19】______to be diligent for the first few days of the week in any case, before【C20】______a plateau and then slackening off. This suggests that the alleged "Hawthorne effect" is hard to pin down.
【C13】
选项 A、evidence
B、guidance
C、implication
D、source
答案A
解析 考查名词辨析。后面的that引导同位语从句，意思是“照明情况和生产效率之间是存在关系的”，而这很明显是一个“证据”，和前文中found相呼应，表示“没有系统的证据能证明生产效率与照明的变化之间存在关联”，因此选A．evidence。guidance“引导，指导”；implication“含义，暗指”；source“来源，根源”，均不符合语境。
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