【OG24-747题】The difference in average annual income in favor of employees who have college degrees, compared withthose who do not have such degrees, doubled between 1980 and 1990. Some analysts have hypothesized that increased competition between employers for employees with college degrees drove up income for such employees.Which of the following, if true, most seriously undermines the explanation described above?_mofa留学圈mofaGRE在线题库系统_GRE在线搜题_GRE题库解析_GRE真题机经_GRE课程_GRE培训机构

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The difference in average annual income in favor of employees who have college degrees, compared with

those who do not have such degrees, doubled between 1980 and 1990. Some analysts have hypothesized that increased competition between employers for employees with college degrees drove up income for such employees.

Which of the following, if true, most seriously undermines the explanation described above?

During the 1980s a growing percentage of college graduates, unable to find jobs requiring acollege degree, took unskilled jobs. The average age of all employees increased slightly during the 1980s. The unemployment rate changed very little throughout most of the 1980s. From 1980 to 1990 the difference in average income between employees with advanced degrees and those with bachelor's degrees also increased. During the 1980s there were some employees with no college degree who earned incomes comparable to the top incomes earned by employees with a college degree.

正确答案： A

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题干翻译
在1980年到1990年间，拥有大学学位的员工相比没有此类学位员工的收入翻倍。一些分析人士假设，雇主之间对拥有大学学位员工的竞争加剧推动了这些员工收入上升。 逻辑链
Competition→Income up（有学位员工） 问题类型
削弱题 推理过程
论点是雇主间对有大学学位员工的竞争加剧导致这些员工收入上升，要削弱此论点，需找到能表明不是竞争因素导致收入上升的选项。 选项分析
A选项：在20世纪80年代，越来越多的大学毕业生找不到需要大学学位的工作，只能从事无技能工作。说明有学位的员工就业情况不好，并非因为雇主竞争激烈而提高收入，直接削弱了论点，当选。 B选项：20世纪80年代所有员工的平均年龄略有增加。年龄与有学位员工收入上升的原因无关，排除。 C选项：20世纪80年代大部分时间失业率变化很小。失业率与有学位员工收入上升的因果关系不大，排除。 D选项：从1980年到1990年，拥有高级学位和学士学位员工之间的平均收入差异也在增加。讨论的是不同学位层次员工间收入差异，而非有学位员工整体收入上升的原因，排除。 E选项：在20世纪80年代，有一些没有大学学位的员工收入与有大学学位员工的最高收入相当。说的是无学位和有学位员工收入对比情况，未涉及有学位员工收入上升原因，排除。

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