What does the passage mainly discuss? According to the passage, the main disadvantage of person-on-the-street interviews is th

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问题  What does the passage mainly discuss?
  According to the passage, the main disadvantage of person-on-the-street interviews is that they

选项 A、are not based on a representative sampling
B、are used only on television
C、are not carefully worded
D、reflect political opinions

答案A

解析
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