The term blue collar job typically refers to a job that involves manual labor and receives an hourly rate of pay rather than an

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问题     The term blue collar job typically refers to a job that involves manual labor and receives an hourly rate of pay rather than an annual salary. The term blue collar stems from the uniforms worn by many industrial workers that were typically made of heavy duty, blue fabric and consisted of blue shirts and pants or blue coveralls. The automotive manufacturing and repair industries as well as the construction industry have been referred to as blue collar for decades.
    Though a blue collar job was once thought to be reserved for people with no education or skill who were seemingly only qualified to perform manual labor, the defining qualities of a blue collar job no longer fit in some industries. For example, many computer and high tech jobs pay by the hour and some construction industry positions pay an annual salary. In modern times, a blue collar job may also require education for a number of positions, which are categorized as "skilled trades. "
    People who have traditionally held a blue collar job are referred to as blue collar workers. The stereotype and social class of the blue collar worker has changed over the years. This is due in part to the increase in technology, which requires training, and the increase in pay among some industries.
    Blue collar jobs within some industries have seen a decline, especially in the manufacturing industries, as the manual labor within the industry has become outsourced at an increasing rate. Construction, HVAC (Heating, Ventilation, and Air-Conditioning), and automotive repair remain leading industries offering blue collar jobs in America.
Please summarize the changes in blue collar jobs according to the passage.

选项

答案①A blue collar job now may require education or skill for a number of positions.②Some blue collar jobs receive an annual salary.③The stereotype and social class of the blue collar worker has changed over the gears.④Blue collar jobs within some industries have seen a decline.

解析 事实细节题。文章第一段第一句提到了以前蓝领工作的特点:包含体力劳动、薪酬按小时计算而不是按年计算。第二段第一句提到了另一个特点:蓝领工作不需要教育或技术。第二段第三句则提到现在蓝领工作的变化:一些建筑行业职位的薪酬按年计算;第四句则指出,现在蓝领工作也需要教育。第三段第二句指出,近些年来,人们对蓝领工人的刻板印象和蓝领工人的社会阶层都发生了变化,也就是说蓝领工人的社会阶层有所提高。最后一段第一句指出,一些行业的蓝领工作有所下滑。这几点都是蓝领工作所发生的变化。
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