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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