首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
医学
Children should avoid using mobile phones for all but essential calls because of possible health effects on young brains. This i
Children should avoid using mobile phones for all but essential calls because of possible health effects on young brains. This i
admin
2013-11-14
112
问题
Children should avoid using mobile phones for all but essential calls because of possible health effects on young brains. This is one of the expected conclusions of an official government report to be published this week. The report is expected to call for the mobile phone industry to refrain from promoting phone use by children, and to start labeling phones with data on the amount of radiation they emit.
The Independent Expert Group on Mobile Phones, chaired by former government chief scientist William Stewart, has spent eight months reviewing existing scientific evidence on all aspects of the health effects of using mobile phones. Its report is believed to conclude that because we don’t fully understand the nonthermal effects of radiation on human tissue, the government should adopt a precautionary approach, particularly in relation to children.
There is currently no evidence that mobile phones harm users or people living near transmitter masts. But some studies show that cell-phones operating at radiation levels within current safety limits do have some sort of biological effect on the brain.
John Tattersall, a researcher on the health effects of radiation at the Defense Evaluation and Research Agency’s site at Porton Down, agrees that it might be wise to limit phone use by children. "If you have a developing nervous system, it’s known to be more susceptible to environmental insults," he says, "So if phones did prove to be hazardous — which they haven’t yet—it would be sensible."
In 1998, Tattersall showed that radiation levels similar to those emitted by mobile phones could alter signals from brain cells in slices of rat brain, "What we’ve found is an effect, but we don’t know if it’s hazardous," he says.
Alan Preece of the University of Bristol, who found last year that microwaves increase reaction times in test subjects, agreed that children’s exposure would be greater. "There’s a lot less tissue in the way, and the skill is thinner, so children’s heads are considerably closer," he says.
Stewart’s report is likely to recommend that the current British safety standards on energy emissions from cell-phones should be cut to the level recommended by the International Commission on Non-Ionizing Radiation Protection, which is one-fifth of the current British limit. "The extra safety factor of five is somewhat arbitrary," says Michael Clark of the National Radiological Protection Board. "But we accept that it’s difficult for the UK to have different standards from an international body."
Just because it has not been confirmed yet whether mobile phone emissions can harm human tissue, according to the government report, does not mean that______.
选项
A、the government should prohibit children from using cell-phones
B、we should put down the phone for the sake of safety
C、the industry can have a right to promote phone use
D、children are safe using cell-phones
答案
D
解析
根据第一段第一句话,“除了接一些必须接的电话外,孩子们应该避免使用手机,因为可能对孩子的大脑造成影响。”
转载请注明原文地址:https://kaotiyun.com/show/EPU3777K
本试题收录于:
医学博士外语题库考研分类
0
医学博士外语
考研
相关试题推荐
Thisenvironmentcanalsoaffectaperson’smentaland______health,
Osteoporosisusedtobecalled"thesilentdisease"becauseitsvictimsdidn’tknowtheyhadituntilitwastoolateandthey
A、Sheshouldn’ttakeittooseriously.B、Sheshouldhaveregularmassage.C、Sheshouldexercisemoreandworkless.D、Sheshould
Convincingthepublictofollowhealthadvicecanbetoughandtime-consuming.Thismaybewhychangestohealthmessagesareof
Convincingthepublictofollowhealthadvicecanbetoughandtime-consuming.Thismaybewhychangestohealthmessagesareof
Long-sufferingcouplestakeheart.Thereisagoodreasonforthoseendlessargumentsinthefrontofthecar:menandwomenuse
Long-sufferingcouplestakeheart.Thereisagoodreasonforthoseendlessargumentsinthefrontofthecar:menandwomenuse
About14,000peoplewillcontractHIVtoday.Andtomorrowandthedayafterthat,andeverydayfortheforeseeablefuture.That
A、ProfessorsintheUnitedStatesareverybusy.B、ProfessorsintheU.S.havesomeotherdutiesbesidesteaching.C、Professors
随机试题
多样性指数是反映群落中物种______和均匀度的综合指标。
植物繁殖体的迁移和散布是影响群落原生演替的主要因素。()
______NewYorkCityisAmerica’slargestcity,itisnotthecapitalofNewYorkState;Albanyis.
胰腺损伤的特点是
慢性支气管炎最常见的并发症是
患儿男,2岁。因白血病,肺部感染入院。上午10时体温39.8℃,给予降温。给予该患儿的降温方式是()
变电所的型式应根据()的分布情况和周围环境情况确定。
根据《特种设备安全监察条例》,特种设备检验检测机构应当具备的条件有()。
人是世界的创造者和主宰者,而人类社会每一次重大变革,都无不根植于人类思维范式的革命性突破。只有在精神世界上对自然界和人类社会非凡的理解,才能造就在物质世界实践的巨人。对这段话准确的复述是()。
查询同时选修课程号为C1和C5课程的学生的学号,正确的命令是()。
最新回复
(
0
)