A
“Mobile phones killed our man,”screamed one headline last year.Also came statements that an unpublished study had found that mobile phones cause memory loss.And a British newspaper devoted its front page to a picture supposedly showing how mobile phones heat the brain.For anyone who uses a mobile phone,these are worrying times.But speak to the scientists whose work is the focus of these scared and you will hear a different story.
What we do have,however,are some results suggesting that mobile phones’ emission(辐射) has a variety of strange effects on living tissue that can’t be explained by the general radiation biology.And it’s only when the questions raised by these experiments are answered that we’ll be able to say for sure what mobile phones might be doing to the brain.
One of the strange effects comes from the now famous “memory loss” study.Alan Preece and his colleagues at the University of Bristol placed a device(装置)that copied the microwave emission of mobile phones to the left ear of volunteers.The volunteers were all good at recalling words and pictures they had been shown on a computer screen.Preece says he still can’t comment on the effects of using a mobile phone for years on end.But he rules out the suggestion that mobile phones have an immediate effect on our cognitive(感知的) abilities.“I’m pretty sure there is no effect on short-term memory,”he says.
Another expert,Tatterasll,remarked that his latest findings have removed fears about memory loss.One result,for instance,suggests that nerve cell synapses(神经元突触) exposed to microwave become more—rather than less—receptive to undergoing changes linked to the memory formation.
It would be an even happier outcome if microwave turned out to be good for you.It sounds crazy,but a couple of years ago a team led by William Adey at the Veterans Affairs Medical Center in California,found that mice exposed to microwave for two hours a day were less likely to develop brain tumours(肿瘤)when given a cancer-causing chemical.
So should we forget about mobile phone radiation causing brain tumours and making us unable to think clearly or reasonably?
“If it doesn’t certainly cause cancer in animals and cells,then it probably isn’t going to cause cancer in humans,”says William.And while there’s still no absolute evidence that the mobile phone does damage your memories or give your cancer,the unanimity is:Don’t panic.
1.What worries people who use mobile phones?
A.Mobile phones will kill them. B.Mobile phones cause memory loss.
C.Mobile phones heat the brain. D.All the above is right.
2.What is the attitude of Preece on the suggestion that mobile phones have an immediate effect on our cognitive abilities?
A.Doubt. B.Disagree. C.Approve. D.Wait and see.
3.The underlined word “unanimity” in the last paragraph most probably means “ ”.
A.consensus B.disagreement C.possibility D.impossibility
4.From the fifth paragraph,we can infer that being exposed to microwave for two hours .
A.can result in killing you B.is likely to develop brain tumours
C.is unlikely to develop brain tumours D.will cause your loss of memory forever
语篇解读:有报道说手机会对人的健康有影响,本文则介绍了一些科学家的观点,他们认为并没有绝对的证据证明手机对人体有很大的危害。
答案及剖析:
1.D 细节理解题。根据第一段中“Mobile phones killed our man,”screamed one headline last year.Also came statements that an unpublished study had found that mobile phones cause memory loss.And a British newspaper devoted its front page to a picture supposedly showing how mobile phones heat the brain.可知,答案选D。
2.B 观点态度题。根据第三段中But he rules out the suggestion that mobile phones have an immediate effect on our cognitive(感知的) abilities.可知,他不同意这种观点,故选B。
3.A 词义猜测题。根据上文And while there’s still no absolute evidence that the mobile phone does damage your memories or give your cancer可知,这里意为“一致意见是:不要惊慌。”故选A。
4.C 推理判断题。根据第五段found that mice exposed to microwave for two hours a day were less likely to develop brain tumours(肿瘤)when given a cancer-causing chemical.可知,答案选C。
