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
One of the major problems of nuclear energy is the inability of scientists to discover a safe way to dispose of the radioactive
One of the major problems of nuclear energy is the inability of scientists to discover a safe way to dispose of the radioactive
admin
2010-06-18
87
问题
One of the major problems of nuclear energy is the inability of scientists to discover a safe way to dispose of the radioactive wastes which occur throughout the nuclear process. Many of these wastes remain dangerously active for tens of thousands of years, while others have a life span closer to a quarter of a million years. Various methods have been used to date, but all have revealed weaknesses, forcing scientists to continue their search.
The nuclear process involves several stages, with the danger of radioactivity constantly present. Fuel for nuclear reactors comes from uranium ore, which, when mined, spontaneously produces radioactive substances as by-products. This characteristic of uranium, ore went undetected for a long time, resulting in the deaths, due to cancer, of hundreds of uranium miners.
The United States attempted to bury much of its radioactive waste material in containers made of steel covered in concrete and capable of holding a million gallons. For a long time it was believed that the nuclear waste problem had been solved, until some of these tanks leaked, allowing the radioactive wastes to seep into the environment. Canada presently stores its nuclear waste in underwater tanks, with the long-term effects largely unknown.
However, plans are under consideration for above-ground storage of spent fuel from re- actors. These plans include the building of three vast concrete containers, which would be two stories high and approximately the length and width of two football fields. Other suggestions include enclosing the waste in glass blocks and storing them in underground caverns, or placing hot containers in the Antarctic region, where they would melt the ice, thereby sinking down about a mile. This idea has since been abandoned because of the possible adverse effect on the ice sheets.
According to passage, scientists failed to______.
选项
A、discover the characteristic of nuclear process
B、discover the nature of uranium ore
C、save the life of uranium miners
D、store nuclear wastes in underwater tanks
答案
B
解析
根据文章第二段最后一句“This characteristic of uranium ore went undetected for a long time,re suiting in the deaths,due to cancer,of hundreds of uranium miners.”就可知[B]为正确答案。
转载请注明原文地址:https://kaotiyun.com/show/T9lO777K
0
专业英语八级
相关试题推荐
A、Becausethepoliceallowedaverysmallportionofwhitepeoplecrossthebridge.B、Becausemostofthepeopleaskingforhelp
TotheoneBritishcoupleinseventhathasproblemsconceiving,twinssoundlikeadreamcometrue.Sowhenwould-beparentstu
TotheoneBritishcoupleinseventhathasproblemsconceiving,twinssoundlikeadreamcometrue.Sowhenwould-beparentstu
A、TheSurf:AHubforSmallCoastalTownsB、TheSeason:RunningfromtheOctoberSchoolHolidaysC、Australia:CuttingEnergyCon
A、Michelle’sbrotherranawayfromhomeforanunknownwoman.B、Michelle’smotherhadanotherbabywhosenameisMichelleFowler
Weallhaveproblemsandbarriersthatblockourprogressorpreventusfrommovingintonewareas.Whenthathappens,consider
A、Shewasacommercialartistallherlife.B、Shewasconstantlycreatingsomething.C、Shewasnotasencouragingasherhusband
Whatweretheythinking,thecrowdattheTelfordshoppingcentrewhereIanLamstoodswayingonahighledge?Whatmadethemlo
A、Tocancelanappointment.B、Tobookaflightforthebusinesswoman.C、Togetdowntotheminutesoftheirbusinesscontract.D
Accordingtothepassage,thedeclineofgoodmannersismoreworryingbecauseDr.BruceCharltonwouldprobablyprefertosee
随机试题
光华公司董事会讨论在唐山、廊坊、邯郸、沧州等4处建立分公司的必要性:甲说:“分公司应建在唐山或沧州。”乙说:“我不同意在唐山、沧州两地都建分公司”丙说:“我经过调查确信,不应该在唐山或邯郸建立分公司。”丁说:“必须在廊坊建立分公司”。后来事实证明,甲、乙、
09Mn2VDR的化学成分中,ω(C)为0.11%;ω(Mn)为2.06%;ω(Si)为0.24%;ω(Mo)为0.31%;ω(V)为0.76%;ω(Ni)为0.26%;ω(S)为0.030%;ω(P)为0.030%,试求其碳当量(采用ⅡW推荐使用的碳当
图中的A点代表()
背景资料:星辉集团的薪酬水平调整星辉集团股份有限公司有塑料玩具、手机游戏、影视传媒三项主营业务,分别成立了三家子公司,其中塑料玩具是公司赖以起家的传统业务,手机游戏和影视传媒两类业务是后来公司收购的业务。自从有了手机游戏和影视传媒两家子公司之后
关于真皮乳头层下列叙述错误的是
A、金沸草散B、清宁散C、六君子汤D、沙参麦冬汤E、二陈汤痰湿咳嗽主要选方为
阀门的公称压力为1.6MPa,工作压力为1.0MPa,则强度和严密性试验压力分别为()。
风管安装连接后,在刷油、绝热前应按规范进行()检测。
以下关于环境对个体发展的影响,说法正确的是()。
•Readthearticlebelowabouttheimportanceofwritingjobdescriptions.•Choosethebestwordorphrasetofilleachgapfro
最新回复
(
0
)