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  3. The regular use of text messages and e-mails can lower the IQ more than twice as much as smoking marijuana. That is the claim of

The regular use of text messages and e-mails can lower the IQ more than twice as much as smoking marijuana. That is the claim of

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问题     The regular use of text messages and e-mails can lower the IQ more than twice as much as smoking marijuana. That is the claim of psychologists who have found that tapping away on a mobile phone or computer keypad or checking them for electronic messages temporarily knocks up to 10 points off the user’s IQ.
    This rate of decline in intelligence compares unfavorably with the four-point drop in IQ associated with smoking marijuana, according to British researchers, who have labeled the fleeting phenomenon of enhanced stupidity as "infomania".
    Research on sleep deprivation suggests that the IQ drop caused by electronic obsession is also equivalent to a wakeful night.
    Infomania is mainly a problem for adult workers, especially men, the study commissioned by Hewlett Packard, the technology company, has concluded.
    The noticeable drop in IQ is attributed to the constant distraction of "always on" technology when employees should be concentrating on what they are paid to do. Infomania means that they lose concentration as their minds remain fixed in an almost permanent state of readiness to react to technology instead of focusing on the task in hand.
    The brain also finds it hard to cope with juggling lots of tasks at once, reducing its overall effectiveness, the report added. And while modern technology can have huge benefits, excessive use can be damaging not only to a person’s mind, but to their social life.
    Eighty volunteers took part in clinical trials on IQ deterioration and 1,100 adults were interviewed. More than six in ten(62 per cent)of people polled admit that they were addicted to checking their e-mails and text messages so often that they scrutinized work-related ones even when at home or on holiday. Half said that they always responded immediately to an email and one in five(21 per cent)will interrupt a meeting to do so.
    Furthermore, infomania is having a negative effect on work colleagues, increasing stress and dissenting feelings. Nine out of ten polled thought that colleagues who answered e-mails or messages during a face-to-face meeting were extremely rude. Yet one in three Britons believes that it is not only acceptable, but actually diligent and efficient to do so.
According to the passage, "infomania" tends to
选项 A、be caused by a decline in intelligence.
B、leave a permanent influence on one’s IQ.
C、be caused by electronic obsession.
D、result in one’s sleep deprivation.
答案C
解析 根据题干中的infomania定位到第2段。对比第2段和第3段中可知infomania与the IQ drop同义，第3段the IQ drop后的定语caused by electronic obsession表明infomania就是由electronic obsession引起的，因此，C正确。infomania和A中的a decline in intelligence为相同的概念，两者不可能构成因果关系；B中的permanent一词缺乏原文依据；根据原文，D提到的sleep deprivation与infomanian同样为导致智力下降的原因，而它们之间的因果关系也缺乏原文依据。
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