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  3. As America moves into the 21st century, the changing composition of the workforce will become more evident to both the general p

As America moves into the 21st century, the changing composition of the workforce will become more evident to both the general p

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问题     As America moves into the 21st century, the changing composition of the workforce will become more evident to both the general public and American businesses. In the early part of the 21st century, growth in the U.S. labor supply is expected to slow considerably. If labor demand remains as strong as in recent years, firms will have to continue their active recruitment of new workers to fill job openings. This increased emphasis on recruitment has created and will continue to create new employment opportunities for a broader group of job seekers from relatively untapped labor pools. Demographically, the share of whites and males in the labor force will continue to fall in the 21st century, while the share of women and ethnic and racial minority workers, especially Hispanics and Asians, will grow. The characteristics of this more diverse group of individuals could have important implications for American workplaces.
    High skills and knowledge are important to American firms competing in a global economy and the best measure of skills and knowledge is educational attainment. While the U.S. workforce as a whole has a higher educational level than ever, some problems are clear. Levels of educational attainment are quite low among recent immigrant groups. For example, less than 25 percent of the Mexican-born population residing in the U.S. has a high school diploma or higher. As growth in the U.S. labor force slows, improvements in the overall skills and competence of the workforce will depend primarily on upgrading the skills of existing workers. Attempts to improve the educational attainment of future cohorts of workers through educational reform are vitally important. Strong recruitment of new workers coupled with continued interest in cultivating workplace diversity means that businesses must be aware of current and future trends in the racial, ethnic, age, and gender composition of the workforce.
The main idea of the second paragraph is______.
选项 A、diversity of the workforce has its disadvantages
B、besides new opportunities, the changing workforce also contain challenges
C、the low educational levels of immigrants is a challenging problem
D、America had better face the problem of declining skills or it will suffer
答案B
解析 属主旨思想题，考查第二段的大意概括。第二段重点涉及美国劳动力构成变化存在的问题，B正确。C项以偏概全，不够全面，移民工人学历低只是问题之一。
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