首页
登录
职称英语
A study of people who used cell phones for an average of less than three yea
A study of people who used cell phones for an average of less than three yea
游客
2023-09-13
47
管理
问题
A study of people who used cell phones for an average of less than three years found no evidence the devices cause brain cancer. The research didn’t, however, answer the question of whether longer-term use is dangerous. The study of 891 people did find a slightly increased risk for a rare type of brain cancer, but the researchers said it was not statistically significant. While they acknowledged longer-term studies are needed, the researchers said the overall results should reassure the more than 86 million cell-phone users nationwide. "We feel confident that the results reflect that cell phones don’t seem to cause brain cancer," said epidemiologist Joshua Muscat, a scientist at the American Health Foundation who helped lead the study.
Publication of Muscat’s research prompted the New England Journal of Medicine to release a study showing similar results. The study, led by National Cancer Institute researchers, looked at 782 brain cancer patients and 799 people without cancer. Maximum cell-phone use was at least an hour per day for five or more years, and no brain-cancer link was found even at that level.
Unlike regular telephones, handheld cell phones contain an antenna inside the receiver, which puts the user’s brain close to the electromagnetic radio waves the antenna emits. Since cell phones were introduced in the United States in 1984, conflicting data have emerged from safety studies on animals and humans.
The Food and Drag Administration (FAD) has said there is no evidence that the phones are unsafe, but it has joined with wireless industry in sponsoring research on the devices. Some cell-phone makers have also started disclosing their products’ radiation levels.
Another study involved phone-use questionnaires given to 469 men and women aged 18 to 80 with brain cancer and a 422-member cancer-free control group. Cell-phones use was slightly more common among the cancer-free participants, though average cell-phone use for both groups was under three hours monthly for less than three years.
The amount and duration of cell-phone use were not related to an increase brain cancer risk except for a type of neuron-cell tumor called neuroepitheliomatous cancer. Of the 35 patients with this rare tumor, 14 percent used cell-phones. [br] The result of another study involved phone-use questionnaires shows that ______.
选项
A、brain cancer patients don’t incline to use cell-phones
B、cancer-free participants like to use cell-phones
C、significance of cell-phones
D、cancer-free participants seldom use cell-phones
答案
A
解析
事实细节题。从第五段的Cell-phone use was slightly more common among the cancer-free participants...相比于脑癌患者,非脑癌患者使用移动电话时间稍长一些;可以看出A是正确的。B“非脑癌患者喜欢使用移动电话”原文中未提到;D“非脑癌患者很少使用移动电话”相矛盾,所以两项都排除;至于C“移动电话的重要性”不是这项研究所涉及的内容,所以不选。
转载请注明原文地址:https://tihaiku.com/zcyy/3011502.html
相关试题推荐
Shynessisthecauseofmuchunhappinessforagreatmanypeople.Shypeople
Shynessisthecauseofmuchunhappinessforagreatmanypeople.Shypeople
Shynessisthecauseofmuchunhappinessforagreatmanypeople.Shypeople
Shynessisthecauseofmuchunhappinessforagreatmanypeople.Shypeople
Shynessisthecauseofmuchunhappinessforagreatmanypeople.Shypeople
[originaltext]Mostpeoplefeellonelysometimes.Butitusuallyonlylasts
[originaltext]M:Manypeopleseemtobeonadiet.Haveyounoticedthat,Anna?
[originaltext]M:Manypeopleseemtobeonadiet.Haveyounoticedthat,Anna?
[originaltext]M:Manypeopleseemtobeonadiet.Haveyounoticedthat,Anna?
Morethan12,300peoplewerekilledandtensofthousandslefthomelessafte
随机试题
IwasborninFeb.12,1809,inHardinCounty,Kentucky.Myparentswereboth
HappinessandSadnessA)Happinessandsadnessaretwomo
信息时代,除了传统的电子邮件、远程登录、新闻与公告等应用外,新型的Interne
在同被审计单位的恰当人员沟通过不利审计发现之后,恰当的措施是要()。A.计划
某计算机公司总经理口头答应某建筑公司以每台6000元的价格购买30台A型计算机的
根据《侵权责任法》,以下属于知识产权侵权责任承担方式的有()。A、赔偿损失 B
2020年北京市生态与环境价值中,年值同比增长慢于贴现值的指标有:A.4
物业是指已建成并经竣工验收投入使用的()。A.各类房屋及配套的设施设备 B.
在一容器中,反应,恒温条件下达到平衡后,加一定量Ar气体保持总压力不变,平衡将
急性根尖周炎浆液期的临床症状如下,除外A.持续自发痛 B.患牙浮出感 C.温
最新回复
(
0
)