2. 外语
  3. Choose TWO letters, A-E. Which TWO things are true about the participants in the study on the traffic-light system? A They had l

Choose TWO letters, A-E. Which TWO things are true about the participants in the study on the traffic-light system? A They had l

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问题 Choose TWO letters, A-E.
Which TWO things are true about the participants in the study on the traffic-light system?
A They had low literacy levels.
B They were regular consumers of packaged food.
C They were selected randomly.
D They were from all socio-economic groups.
E They were interviewed face-to-face.
选项 A、 
B、 
C、 
D、 
E、 
答案D
解析 文中先是出现了定位词participants，之后便提到干扰选项A，“I don’t think they targeted the right people．They should have focused on people with low literacy levels…．”和A选项不符，可以排除A；“But it’s good to get feedback from all socio-economic groups．”其中all socio-economic groups为D选项原词，因此D为正确答案；“…if they hadn’t interviewed participants face-to-face，they could have used a much bigger sample size．”，此处是说话者做的假设推测，说明事实与之相反，对应E选项中的interviewed face-to-face，因此E为正确答案。
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