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  3. Technology greatly helps a lot of people. Teens use computers or mobile phones to do homework, communicate and sharing pictures

Technology greatly helps a lot of people. Teens use computers or mobile phones to do homework, communicate and sharing pictures

admin2021-06-15  3
问题          Technology greatly helps a lot of people. Teens use computers or mobile phones to do homework, communicate and sharing pictures with their friends and to have some fun. Internet holds a huge amount of information and teenagers can get almost anything they want to know from their smart phones or computers. However, at the same time, scientists and educators become more and more concerned that the frequent use of mobile phones from an early age may lead to physical and cognitive problems.
         Our increasing dependence on smartphones has given rise to the term "nomophobia" or "no-mobile-phone phobia". If someone has nomophobia, it means that he or she feels uneasy when being unable to use mobile phones. One survey from the UK showed that 66% of respondents have some form of nomophobia and 41% of them said they had two or more phones.
         Smartphone addiction could be changing your brain. A study from South Korea conducted on teenagers showed that the brains of those who were addicted to phones had higher levels of a neurotransmitter which could lead to weak brain control and attention.
         "It’s a very small study, so you have to take it with a grain of salt," said Stanford neuroradiologist Dr. Max Wintermark, an expert who was not connected with the research. "It’s the first study that I read about internet addiction. But there are many studies that link alcohol, drug and other types of addiction to the neurotransmitter changes in the brain. "
         Another study got similar result. Too little sleep and too much screen time were clearly linked to a drop-off in cognitive skills, such as language ability, memory and the ability to finish a task, according to the report published by The Lancet Child & Adolescent Health. "We found that more than two hours of recreational screen time in children was associated with poorer cognitive development," says lead author Jeremy Walsh, a researcher at the Children’s Hospital of Eastern Ontario Research Institute.
         "Based on our findings, paediatricians, parents, educators and policymakers should promote limiting recreation screen time and prioritising healthy sleep routines during childhood and adoles cence."
         Walsh and his team looked at data—based on detailed questionnaires—for 4,520 children spread across 20 locations in the United States.
         They also tested the kids for six kinds of cognitive skills, adjusting the results for household income, puberty development and other factors that might affect performance.
         The results were measured against the Canadian 24-hour Movement Guidelines for children.
         For sleep and exercise, the recommendations align with those of the World Health Organization, but Canada is the first country to propose limits for time spent in front of a back-lit screen.
Which of the following statements will the author DISAGREE on probably?
选项 A、People should limit the time spent in playing with their smartphones.
B、Teachers should not allow their children to use smartphones in schools.
C、Smartphones are useless to teenagers and it is not necessary to own one.
D、Students now are near-sighted mainly because they have excessive screen time.
答案C
解析 推断题。题干：作者可能不同意以下哪一项表述?A项“人们应该限制玩智能手机的时间”，选项关键词为limit，根据关键词定位到文章第六段“Based on our findings，paediatricians，parents，educators and policymakers should promote limiting recreation screen time and…(根据我们的发现，儿科医生、家长、教育工作者和决策者应该提倡限制智能手机的使用时间……)”，故A项符合文意。根据文章第一段最后一句“However，at the same time，scientists and educators become more and more concerned that the frequent use of mobile phones from an early age may lead to physical and cognitive problems.(然而，与此同时，科学家和教育工作者越来越担心，从小就频繁使用手机可能会导致身体和认知问题)”可知，教育工作者已经认识到了频繁使用手机对学生的影响，由此可推断，教师不会允许学生在学校使用手机，B项“老师不应该允许孩子在学校使用智能手机”符合该意思。该句指出从小就频繁使用手机可能会导致身体问题，视力下降也是身体问题的一部分，故D项“现在的学生近视主要是因为他们看屏幕时间过长”符合文意。根据第一段中的“Internet holds a huge amount of information and teenagers can get almost anything they want to know from their smart phones or computers.(互联网拥有大量的信息，青少年几乎可以从智能手机或电脑中获得任何他们想知道的东西)”可知，对青少年来说，智能手机并不是完全没有用的，因此，C项“智能手机对青少年来说毫无用处，没有必要拥有智能手机”的说法过于绝对，不符合文意，故本题选C。
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