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
For decades many U.S. veterans who took part in atmospheric nuclear tests have wondered whether their exposure to radiation migh
For decades many U.S. veterans who took part in atmospheric nuclear tests have wondered whether their exposure to radiation migh
admin
2013-01-12
57
问题
For decades many U.S. veterans who took part in atmospheric nuclear tests have wondered whether their exposure to radiation might ultimately cost them their lives. Their private fears became a public issue in 1976 after a veteran claimed his leukemia was caused by radiation from a 1957 test series.
The atomic veterans and their families, as well as researchers and policy-makers, continue to struggle for definitive answers. These have been elusive, at least in part, because a crucial piece of information has been difficult to get--the radiation dose that each individual received.
In the largest study to date, researchers from the Institute of Medicine (IOM) have come up with some partial answers. But they too were limited in their ability to draw conclusions by the lack of usable information on radiation exposure.
The new study focused on participants in five series of nuclear tests, all of which took place either in the Nevada desert or the South Pacific. Nearly 70,000 soldiers, sailors, airmen, and marines were involved in at least one of these, and about 30 percent of them have now died. For comparison, researchers selected a group of 65,000 military people serving at the same time under similar conditions, except that they did not take part in nuclear tests.
After an intensive review of service and death records, researchers found no difference between the two groups in overall death rates or in total deaths from cancer. Had there been a dramatic radiation effect, it would have shown up in this comparison.The researchers also analyzed specific causes of death, including diseases linked in other studies to radiation. Here there were some differences. Among the nuclear test veterans, 14 percent more died from leukemia than those in the comparison group, although the difference lacked statistical significance and could have resulted from chance.
When comparisons were made based on whether the veterans participated in nuclear tests in Nevada or in the Pacific Ocean, the differences were sharper: a 50 percent higher leukemia death rate among Nevada atomic veterans than among the comparison group. This was not true among Pacific test participants, who actually had a slightly lower, though not statistically significant leukemia death rate than those in their comparison group.
The latest study includes a comparison made between ______.
选项
A、healthy veterans and unhealthy veterans
B、nuclear test participants and those with no radiation exposure
C、the veterans who are still alive and those who have died
D、people who died of cancer and people who took part in atomic tests
答案
B
解析
本题的依据句是第四段的“For comparison,researchers selected a group of 65,000 military people serving at the same time under similar conditions,except that they did not take part in nuclear tests.”,从中可知B项为正确答案。
转载请注明原文地址:https://kaotiyun.com/show/L49O777K
0
考博英语
相关试题推荐
Somepeopleprefertoplanactivitiesfortheirfreetimeverycarefully.Otherschoosenottomakeanyplansatallfortheirf
Everychemicalchangeeitherresultsfromenergybeingusedtoproducethechange,orcausesenergytobe______insomeform.
Whatisitthatbringsaboutsuchanintimateconnectionbetweenlanguageandthinking?Istherenothinkingwithouttheuseof
Althoughitwashisfirstexperienceaschairman,he______overthemeetingwithgreatskill.
AlthoughthisbookclaimstobeabiographyofGeorgeWashington,manyoftheincidentsareimaginary.
Howefficientisoursystemofcriminaltrial?Doesitreallydothebasicjobweaskofit—convictingtheguiltyandacquitting
Althoughtheyplanttreesinthisareaeveryyear,thetopsofsomehillsarestill______.
(Tobemeasured)intermsofitsmembers,teachingis(theworld’sbiggestprofession).Thoughtherolesandfunctionsofteache
AstudybyscientistsinFinlandhasfoundthatmobilephoneradiationcancausechangesinhumancellsthatmightaffectthebr
Theprofessorfoundhimselfconstantly______thequestion:Howcouldanyonedothesethings?
随机试题
三角形屋架一般高度是跨度的多少?
女性,40岁,做阑尾切除手术时,发现阑尾尖端有一直径0.3.54in的灰白色肿物,质硬,界限清楚,但无包膜,经甲醛固定后肿物呈淡黄色。显微镜下发现,肿物内瘤细胞大小较一致,呈立方形或矮柱状,细胞排列成实性或条索,电镜下见电子密度高的神经分泌颗粒。对明确
A.庆大霉素B.头孢噻呋C.磺胺甲噁唑D.恩诺沙星E.林可霉素抑制细胞膜通透性并可影响蛋白质合成的多个环节的是
循环冷却水系统的控制系统最常用的防腐蚀方法是以下哪种?(2004,54)
某上市银行职员沈某与另一家上市银行的职员林某在一次学术研讨会中认识,作为银行业从业人员,他们()
根据学习策略所起作用,丹瑟洛把学习策略分为()。
领导运用权力必须遵从和维护规范制度,但也有超越规章制度进行特殊处理,这实际是()。
In2010,afederaljudgeshookAmerica’sbiotechindustrytoitscore.CompanieshadwonpatentsforisolatedDNAfordecades—b
以下不能作为容器使用的控件是
Yearsago,doctorsoftensaidthatpainwasanormalpartoflife.Inparticular,whenolderpatients【C1】______ofpain,theywer
最新回复
(
0
)