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
33
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.
"antenna" in the third paragraph probably means ______.
选项
A、feeler
B、aerial
C、circuit
D、metal
答案
B
解析
语义理解题。由antenna所在句后面从句中的electromagnetic radio waves“电磁波”和 emit“散发;等词可以推出antenna为天线的意思,因为其他三个词都不常与emit构成语义搭配.故本题答案为B。A“感觉者”;C“电路”;D“金属”。
转载请注明原文地址:https://kaotiyun.com/show/41OK777K
0
大学英语六级
相关试题推荐
A、Theimportanceofplay.B、Theimportanceofbooks.C、Therelationshipbetweenplayandwork.D、Children’sspeechdevelopment.
TheybothlikedLondonbecausetheycouldspeakEnglishatabarorarestaurant.Theplacewherepeoplecangetupandsayany
Nowadays,scientistsstillhavenotmadehugeprogressontheresearchofearthquakebecausetheyhavenotfullyunderstoodwhat
A、Americanindustrialists.B、Frencheconomists.C、Internationalleaders.D、CivilWarveterans.BWhofirstusedthemottolaisser
Whydowecry?Canyouimaginealifewithouttears?Notonlydotearskeepyoureyeslubricated,theyalsocontaina(36)______
Whydowecry?Canyouimaginealifewithouttears?Notonlydotearskeepyoureyeslubricated,theyalsocontaina(36)______
Whydowecry?Canyouimaginealifewithouttears?Notonlydotearskeepyoureyeslubricated,theyalsocontaina(36)______
A、Shethinksherpayforthejobistootow.B、Shebelievessheshouldbepromotedasamanager.C、Shethinksherjobcannotmak
Theconceptofpersonalchoiceconcerninghealthisimportantbecause______.Whatdoes"liveacompletelysedentarylifestyle"
A、BecauseApplehasmadeandplayedalotofads.B、Becausetheyaregettingsmallerandsmaller.C、Becausetheykeepdeveloping
随机试题
消化管平滑肌的紧张性和自律性主要依赖于
男性,61岁,患有高血压,同时伴有2型糖尿病,尿蛋白(+),选择最佳降压药物为
A、伸筋草B、丝瓜络C、鹿衔草D、雷公藤E、青风藤能利尿的药物是()。
潜在的市场需求量是指在一定时期内,在一定行业营销水平和一定的市场环境下,一个行业中所有企业可能达到的最大()
某商场在开业前要选择经营商业的种类,现有甲、乙、丙、丁四类商品可供选择。由于对未来市场需求无法做到比较精确的预测,只能大致估计为:需求量较高、需求量中等、需求量较低三种情况。这三种情况的预计损益值如下表所示:根据以上资料,回答下列问题:总经理对市
(2009年新制度)下列关于企业价值评估的表述中,正确的有()。
【2015年河南新乡.单选】新课程改革的核心任务是()。
“给我一打健全的儿童,一个由我支配的环境,我可以保证,无论这些儿童的祖先如何,我都可以把他们培养成为任何一种人,或者是政治家、军人、律师,抑或是乞丐、盗贼。”说出这句话的是
Itisessentialforapolicemantobetrainedincriminallaw______.Theeverydaylifeofapolicemanordetectiveis______.
A、Itreflectscommercialinterests.B、Itisafashionableprofessionalevent.C、Itisanessentialaffair{orinternationalcine
最新回复
(
0
)