2. 外语
  3. The survey results suggest that the largest increase in substance use should be ______. The people who took part in the survey

The survey results suggest that the largest increase in substance use should be ______. The people who took part in the survey

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问题 The survey results suggest that the largest increase in substance use should be ______.
The people who took part in the survey were ______.
选项 A、randomly selected United States citizens.
B、randomly selected New York City citizens.
C、randomly selected Manhattan residents who live close to the World Trade Center.
D、randomly selected American citizens who witnessed the terrorist attack.
答案C
解析 文章第二段的开头说，"The investigators found survey participants by randomly dialing New York City phone numbers and screened potential respondents for Manhattan residents living in areas close to the World Trade Center"．研究人员先是随机地抽取纽约的电话号码，然后只挑选了那些曼哈顿岛上，住所离世界贸易中心比较近的居民。
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