2. 外语
  3. The survey results suggest that the largest increase in substance use should be ______. What can be inferred from the last para

The survey results suggest that the largest increase in substance use should be ______. What can be inferred from the last para

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问题 The survey results suggest that the largest increase in substance use should be ______.
What can be inferred from the last paragraph?
选项 A、Demographic information such as gender, race and marital status was not collected.
B、Gender and race do not have much effect on the amount of substance abuse.
C、Age and marital status do not make any difference on substance abuse.
D、Income is a better predictor of substance abuse than age.
答案B
解析 文章最后一段说，"Increase in substance abuse did not differ significantly between men and women or among racial or ethnic groups"．(性别和种族的差别，在是否增加喝酒、吸烟和吸毒的数量上，不起作用；也就是说，是否多喝酒多抽烟，和性别种族无关)。
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