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In 1924 America's National Research Coun

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问题 In 1924 America's National Research Council sent two engineers to supervise a series of industrial experiments at a large telephone-parts factory called the Hawthorne Plant near Chicago.It hoped they would learn how stop-floor lighting 1 workers'productivity.Instead,the studies ended 2 giving their name to the"Hawthorne effect",the extremely influential idea that the very 3 to being experimented upon changed subjects'behavior.The idea arose because of the 4 behavior of the women in the Hawthorne plant.According to 5 of the experiments,their hourly output rose when lighting was increased,but also when it was dimmed.It did not 6 what was done in the experiment;7 something was changed,productivity rose.A（n）8 that they were being experimented upon seemed to be 9 to alter workers'behavior 10 itself.After several decades,the same data were 11 to econometric the analysis.Hawthorne experiments has another surprise store 12the descriptions on record,no systematic 13 was found that levels of productivity were related to changes in lighting.It turns out that peculiar way of conducting the experiments may be have let to 14 interpretation of what happed.15,lighting was always changed on a Sunday.When work started again on Monday,output 16 rose compared with the previous Saturday and 17 to rise for the next couple of days.18,a comparison with data for weeks when there was no experimentation showed that output always went up on Monday,workers 19 to be diligent for the first few days of the week in any case,before 20 a plateau and then slackening off.This suggests that the alleged"Hawthorne effect"is hard to pin down.4选？A.controversialB.perplexingC.mischievousD.ambiguous
选项 A.controversial
B.perplexing
C.mischievous
D.ambiguous
答案 B
解析 该题需要结合上下文来解答。后文的意思是，无论照明灯变亮还是变暗，女工的生产效率都会提高，因此这个现象是“令人费解的”，只有perplexing有此意，而其它三个选项虽然也都可用于修饰空后的behavior。然而联系上下文，上下文并没有涉及到妇女们的行为是“有争议的”、“恶作剧的”或“引起歧义的”，故本题的正确答案是B。
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