The author had trouble operating his VCR because______. According to the passage, before a VCR is sold on the market, its origi

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问题 The author had trouble operating his VCR because______.
According to the passage, before a VCR is sold on the market, its original model should be tried out

选项 A、among ordinary consumers who are not technically minded
B、among people who are technically minded
C、among experienced technicians and potential users
D、among people who are in charge of public relations

答案A

解析 细节题。第四段第二句"For a start,designers should build an original model of the machine and try it out on typical members of the public—not on colleagues in the development laboratory"清楚地回答了此问题,其中typical members of public即"普通消费者",故A为正确答案。
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