单项选择题

What did the man do last night()

A. He bought a computer.
B. He watched a TV show.
C. He surfed the Internet.

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Questions 24-30 : Types of Survey Advantages Disadvantages Mail (24) Not good for decent response rate Good for particular groups Telephone Good for when time and surveylength are limited (25) In-person Good for collecting complex infor-mation Can mean lots of (26) Street Interview (27) Not scientific sampling Survey Content Questions can ask about: opinions and attitudes factual characteristics or behaviour Questions can be open-ended or (28) . Questions can be from 5 minutes to 1 hour+long Survey can be a (29) -interviewees can be questioned on 2 or more occasions Ethics Results must not be used commercially Individuals should not be mentioned Results should be in (30) ie: statistical tables or charts

问答题

1.What happened to Terry Fox when he was 18

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