首页
登录
职称英语
One of the major problems of nuclear energy is the inability of scientists to
One of the major problems of nuclear energy is the inability of scientists to
游客
2025-01-05
26
管理
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. [br] 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://tihaiku.com/zcyy/3899133.html
相关试题推荐
Oneofthemajorproblemsofnuclearenergyistheinabilityofscientiststo
Upwardsofabillionstarsinourgalaxyhaveburntuptheirinternalenergy
[originaltext]TheInternationalAtomicEnergyAgencysaysU.S.EnergySecre
[originaltext]TheInternationalAtomicEnergyAgencysaysU.S.EnergySecre
Environmentalscientistsobservethatitisofgreatsignificancetoprotect
Environmentalscientistsobservethatitisofgreatsignificancetoprotect
Environmentalscientistsobservethatitisofgreatsignificancetoprotect
Environmentalscientistsobservethatitisofgreatsignificancetoprotect
Thebizarreanticsofsleepwalkershavepuzzledpolice,perplexedscientists,
Thebizarreanticsofsleepwalkershavepuzzledpolice,perplexedscientists,
随机试题
SevereandincreasingnumerouscriticsarepointingtodeficienciesintheBriti
[audioFiles]2021m5x/audio_ve01005j_ezflisteningxa_0080_202105[/audioFiles]
当代马克思主义新闻观的核心是()A.坚持党性原则 B.坚持正确舆论导向 C.
对室性心动过速描述错误的是A.QRS波增宽 B.可出现融合波 C.左后分支室
作为教师道德主体一分子的教师个人,他的主体地位和主体性并不是由教师个人来确定的,
血栓闭塞性脉管炎营养障碍期最主要的临床表现是A.肢端发黑、干性坏疽 B.间歇性
天柱穴所属的经脉是( )。A.足少阳胆经 B.手少阳三焦经 C.手太阳小肠
一住店客人未付房钱即想离开旅馆去车站。旅馆服务员揪住他不让走,并打报警电话。客人
下列有关注册会计师在对进一步审计程序设计时采取的总体审计方案的说法中,正确的是(
诊断甲亢的首选实验室检查( )。A.FT3?、FT4 B.TT3?、TT4
最新回复
(
0
)