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
33
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.
One comparison mentioned in the last paragraph was made between ______.
选项
A、Pacific test participants and those who undertook the Nevada test
B、Nevada atomic veterans and those who didn’t take part in any nuclear tests
C、Veterans in Nevada and Pacific atomic tests and the comparison group
D、half of Nevada test participants and half of the group of no test participants
答案
C
解析
从最后一段内容可知,这项对比是在参加内华达州或太平洋的原子能试验的老兵和对照组之间进行的。因此C项为正确答案。
转载请注明原文地址:https://kaotiyun.com/show/h49O777K
0
考博英语
相关试题推荐
ProfessorTaylor’stalkhasindicatedthatsciencehasaverystrong______ontheeverydaylifeofnon-scientistsaswellassc
Intheworldofmanagement,employeesarenonexemptorexempt,dependingonwhethertheygetpaidforovertimeornot.【21】acrea
【66】Astateuniversitypresidentwasarrestedtodayandchargedwithimpersonateapoliceofficerbecame,theauthoritiessay,h
【66】Astateuniversitypresidentwasarrestedtodayandchargedwithimpersonateapoliceofficerbecame,theauthoritiessay,h
TheNationalTrustinBritain,togetherwithsimilarvoluntaryorganization,playsanincreasinglyimportantpartinthepreserv
TheNationalTrustinBritain,togetherwithsimilarvoluntaryorganization,playsanincreasinglyimportantpartinthepreserv
Thetasteofthefoodwasso______thatitwashardlynoticeable.
AproposedRussianbanonEuropeanUnionmeatexportscouldjeopardizeRussia’saspirationstojointheWorldTradeOrganization
Opponentsofaffirmativeactionsaythebattleovertheuseofraceincollegeadmissionsishardlyover,despitetheSupremeCo
Opponentsofaffirmativeactionsaythebattleovertheuseofraceincollegeadmissionsishardlyover,despitetheSupremeCo
随机试题
以兴奋性增高为特征的高级神经活动急性失调状态是()
原发性肺结核病的病变特点是
戒毒药品只供应
男孩,3岁,出生后半年发现智能发育落后,反复惊厥,且尿有鼠尿臭味。查体:目光呆滞,毛发棕黄,心肺正常,四肢肌张力高,膝腱反射亢进,尿三氯化铁试验阳性。该患儿可能诊断为
下列关于房地产经纪企业经营模式选择的表述中,错误的是()。
[2000年第108题]下列四种汽车库均设1个汽车疏散出口,哪一种不正确?
混凝土粗骨料的粒径范围为()mm。
在确定土石坝土料压实参数的碾压试验中,以单位压实遍数的压实厚度()者为最经济合理。
的分子增加6,要使分数的大小不变,分母应该增加______。
中共七大最重要的历史贡献是
最新回复
(
0
)