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
外语
A study of people who used cell phones for an average of less than three years found no evidence the devices cause brain cancer.
A study of people who used cell phones for an average of less than three years found no evidence the devices cause brain cancer.
admin
2010-03-26
28
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.
Muscat’s research and a study in New England Journal of Medicine demonstrate that ______.
选项
A、cell phones don’t seem to cause brain cancer
B、if you use cell-phone in a long term it is possible to cause brain cancer
C、782 brain cancer patients are caused by using cell-phones
D、the two researches of them are not scientific
答案
A
解析
推理判断题。 从第一段的最后一句we feel confident that the results reflect that cell phones don’t seem to cause brain cancer“我们确信该结果反映出移动电话似乎并不导致癌症,”和第二段的第一句…the New England Journal of Medicine to release a study showing similar results.在那些未患脑癌的人员当中移动电话每天1小时连续使用5年,也没发现脑
转载请注明原文地址:https://kaotiyun.com/show/p1OK777K
0
大学英语六级
相关试题推荐
WhatcanpeopleknowfromthecrownofanancienttreefoundinNewYork?Whywasitpossiblefortheseancienttreesletmore
Theethical(伦理的)behaviorinindustrializedcountrieshasbeenputunderpressure.DuringthelastyearinNorwaywehaveseenc
Nowadays,scientistsstillhavenotmadehugeprogressontheresearchofearthquakebecausetheyhavenotfullyunderstoodwhat
Nowadays,scientistsstillhavenotmadehugeprogressontheresearchofearthquakebecausetheyhavenotfullyunderstoodwhat
Whydowecry?Canyouimaginealifewithouttears?Notonlydotearskeepyoureyeslubricated,theyalsocontaina(36)______
Whydowecry?Canyouimaginealifewithouttears?Notonlydotearskeepyoureyeslubricated,theyalsocontaina(36)______
Forsomeeducators,thereisnothingwrongwithfunandgames.AgroupcalledtheEducationArcaderecentlyhelda(36)______in
Theconceptofpersonalchoiceconcerninghealthisimportantbecause______.AccordingtoFriesandCrapo,whatshouldsoundh
Theuseofwaterreferredinthispassageis______.ThedevelopmentofoceanicwaterpowerisimportanttoAmericabecause___
随机试题
合理选择中间商应考虑的首要因素是_______。
抽油机扭矩利用率是()扭矩的利用程度。
位于冠状沟后部的结构是心的正常起搏点是
有关溶解度的解释收载在中国药典的()
粘结固定桥的固位是依靠
患者,男性,戴用全口义齿1周后。复诊自诉义齿易脱落。询问病史时,最需要了解的是
张某投资设立了一家个人独资企业,以下说法正确的是()
农业生产价值很高的丰产农田,具有开采价值的矿藏埋藏地,在城市用地适用性评定中属于()。
给定资料1.人无信不立,业无信不兴。诚信不仅是个人安身立命的根本,也是社会良序发展的基石。党的十八大以来,党和国家高度重视诚信建设。习近平总书记在多个不同场合围绕诚信主题发表了一系列重要论述,从战略高度为新时代中国的诚信建设提供了基本遵
“揭露”一般是指不好的东西,比如揭露罪行。
最新回复
(
0
)