2. 专升本
  3. Which of following best describes the main idea of the passage? ______. Since 1870, Americans have witnessed______.

Which of following best describes the main idea of the passage? ______. Since 1870, Americans have witnessed______.

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问题 Which of following best describes the main idea of the passage? ______.
Since 1870, Americans have witnessed______.
选项 A、a dramatic change in American service system
B、a great change in the daily life of Americans
C、an increase of supermarkets
D、a great increase in the number of experienced people in the production of services
答案D
解析 细节题。见文章第一段第三、四句“Meanwhile service as a commercial activity has leaped ahead. Since 1870 the experienced labor force engaged in production of services has risen from 25% to 35%”(同时，服务作为一种商业活动也得到了极大发展。从1870年以来，从事服务业的熟练工人数已经从25%上升到35%)。
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