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  3. While the emergence and persistence of ethnic niches testify to the pervasive effects of social structures, the growing ed

While the emergence and persistence of ethnic niches testify to the pervasive effects of social structures, the growing ed

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问题           While the emergence and persistence of ethnic niches testify to the
      pervasive effects of social structures, the growing educational level of African
      Americans since the 1970s has also equipped them for jobs that immigrants
Line    found hard to obtain. The proportion of African Americans workers whose
(5)     limited schooling confines them to such jobs as apparel manufacturing or
       domestic work has declined. In particular, African Americans have found a
       niche in the public sector, a shift that may have diminished the effects of
       immigrant competition and put them in a position to absorb the positive effects
       associated with the population gains produced by immigration. Without formal
(10)     educational credentials, it is difficult for the least-skilled African Americans to
       exploit the ethnic networks implanted in government employment, and thus
       they must find employment in an immigrant saturated market. As the public
       sector is now a declining enterprise, and more and more immigrants seek access
       to public-sector jobs, only alternative deserving of attention is the creation of
(15)     more private-sector employment for African Americans with limited schooling.
The primary purpose of the passage is to
选项 A、analyze a current trend in relation to the past
B、discuss a particular solution to a long-standing problem
C、analyze changes in the way a long-standing problem is viewed
D、apply a generalization to an unusual situation
E、describe an old approach by contrasting it with a newer approach
答案A
解析
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