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、there is a definite relationship between high levels of lead and death. B、the patients with brain tumors have higher levels of
A、there is a definite relationship between high levels of lead and death. B、the patients with brain tumors have higher levels of
admin
2011-03-10
24
问题
A researcher at the University of Rochester in New York has found that workers exposed to high levels of lead on the job have an increased risk of dying from brain cancer. Epidemiologist Edwin Van Wijngaarden looked at data about more than 300,000 people over a nine-year period, comparing the kinds of jobs they had with their causes of death, and he saw a correlation. Mechanics are among the workers more likely to develop deadly brain tumors due to occupational lead exposure. He says, automobile and heavy equipment mechanics, painters and welders—who were more likely to be exposed to lead for longer periods of time—had even higher risks of developing brain cancer than workers unexposed to lead. Most research on lead has focused on its effect on children. Van Wijngaarden says not much is known about its impact over a lifetime. Wijngaarden found only 119 brain tumor deaths. He is continuing his research, looking now at patients who already have brain tumors, to see whether they have higher levels of lead in their bones than other patients.
选项
A、there is a definite relationship between high levels of lead and death.
B、the patients with brain tumors have higher levels of lead in their bones.
C、some workers have higher risks of developing brain cancers than others.
D、higher levels of lead have a long-term effect on children over a lifetime.
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/NxYO777K
0
专业英语八级
相关试题推荐
WilliamC.BryantwasthefirstAmericanlyricpoetofdistinction.Hisfameasapoetdatedfromtheprintingof______in1817.
Whimneighborhoodsarebecomingdarkerin【1】______andmoreexpensive.【1】______Analystssaythatsoaringhousepricesa
A、Al-Qaida.B、Amilitantgroup.C、TheMuslimBrotherhood.D、Agroupofseparatists.B
"Ido."ToAmericansthosetwowordscarrygreatmeaning.Theycanevenchangeyourlife.Especiallyifyousaythematyourown
______isakindoffigureofspeechinwhichapartisusedforthewholeasheadforlife,thewholeforapartasthelawfor
InanewbookcalledPredictions,someoftheworld’sgreatestthinkerspresentavisionofthefuturewithovertonesofascien
Patents,saidThomasJefferson,shoulddraw"alinebetweenthethingswhichareworthtothepublictheembarrassmentofanexc
AirqualityinBritainhasimprovedconsiderablyinthelast30years.Totalemissionsofsmokeintheairhaverisenbyover8
AirqualityinBritainhasimprovedconsiderablyinthelast30years.Totalemissionsofsmokeintheairhaverisenbyover8
A、Anti-terrorism.B、Nuclearnon-proliferation.C、Civilianuseofuranium.D、EconomichelptoEasternEurope.B
随机试题
蛋白质紫外吸收的最大波长是
A.颈动脉的明显搏动B.颈静脉搏动C.颈部大血管处听到血管性杂音D.右锁骨上窝听到连续性静脉“嗡鸣”主动脉瓣关闭不全可出现
某小儿出生体重3700g,身长50cm,面色红润,哭声响亮,一般情况好,其母亲身体健康该小儿应到何时饮食中才能添加蛋黄、水果泥、菜泥、动物血等()
小脑幕切迹疝时肢体活动障碍的特点是( )。
咽结合膜热的病原体是
某68岁社区居民主诉经常发生便秘。社区护士对其进行的健康指导中,不恰当的是()
政府在公共物品供给过程中的主要责任有( )。
(2014)学校教育与生产劳动相脱离,是从()时期开始的。
以下的访问控制列表中,——禁止所有Telnet访问子网17.5.1.0/24。
Doyouknowanyonewhofeelsawkwardatapartyorhatestobeinacrowdofpeople?They’reprobablyjustshy,butiftheyget
最新回复
(
0
)