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
Nuclear power is dangerous to health, safety and even life itself. The danger from nuclear power can be summed up in one word: r
Nuclear power is dangerous to health, safety and even life itself. The danger from nuclear power can be summed up in one word: r
admin
2010-05-26
5
问题
Nuclear power is dangerous to health, safety and even life itself. The danger from nuclear power can be summed up in one word: radiation.
Nuclear radiation has a certain mystery about it, partly because it cannot be detected by human senses. It can’t be seen or heard, or touched or tasted, even though it may be all around us. There are other things like that. For example, radio waves are all around us but we can’t detect them, sense them, without a radio receiver. Similarly, we can’t sense radioactivity without a radiation detector. But unlike common radio waves, nuclear radiation is not harmless to human beings and other living things.
At very high levels, radiation can kill an animal or human being outright (全部地) by killing masses of cells in vital organs. But even the lowest level of radiation can do serious damage. There is no level of radiation that is completely safe. If the radiation does not hit anything important, the damage may not be significant. This is the case when only a few cells are hit, and if they are killed outright, your body will replace the dead cells with healthy ones. But if the few cells are only damaged, and if they reproduce themselves, you may be in trouble. They reproduce themselves in a deformed way. They can grow into cancer. Sometimes this does not show up for many years.
This is another reason for some of the mystery about nuclear radiation. Serious damage can be done without the victim being aware at the time that damage has occurred. A person can be irradiated and feel fine, then die of cancer five, ten, or twenty years later as a result. Or a child can be born weak or liable to serious illness as a result of radiation absorbed by its grandparents. Radiation can hurt us. We must know the truth.
The word "significant" in Paragraph 3 has the similar meaning with ______.
选项
A、fatal
B、meaningful
C、harmful
D、remarkable
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/DtV7777K
0
大学英语四级
相关试题推荐
A、Becauseitismuchslowerthantheearlyone.B、Becauseitoftenarrivesearlier.C、Becauseitisseldomonschedule.D、Becaus
OrganicFoodOrganicfarmingwasamongthefastestgrowingsegmentsofU.S.agricultureduringthe1990s.Thevalueofretai
It’snosecretthatmostbusyAmericanmothersusetheTVsetasalive-inbabysitter.Insomehouseholdsthetubeholdsachild
It’snosecretthatmostbusyAmericanmothersusetheTVsetasalive-inbabysitter.Insomehouseholdsthetubeholdsachild
A、Onlymosquitoescanchangetheirbody-chemistry.B、Theycantransmitaseriousdisease.C、Wecanwipethemoutwithnewinsect
Thebiggestsafetythreatfacingairlinestodaymaynotbeaterroristwithagun,butthemanwiththeportablecomputerinbus
TheCityInonesense,wecantracealltheproblemsoftheAmericancitybacktoasinglestartingpoint:weAmericansdon
Withtheprospectofcoalandpetroleumsuppliesbeingdepletedandwithairpollutionbecominganincreasingconcern,themajor
A、Themovieisnotgood.B、Themovieisexcellent.C、Hewantstoseethemovieagain.D、Hedoesn’twanttostayathome.A
HowBabiesLearnLanguageDuringthefirstyearofachild’slife,parentsandcareersareconcernedwithitsphysicaldevel
随机试题
保证施工质量的重要措施是正确选用以下机械设备中的()。
既是自然界与人类社会分化统一的历史前提,又是自然界与人类社会统一起来的现实基础,这指的是()
政治上层建筑
A.羚羊角B.细辛C.厚朴D.党参E.斑蝥属于资源严重减少的野生药材是()。
按照国务院2005年12月发布的《关于完善企业职工基本养老保险制度的决定》,改革后城镇企业职工基本养老保险的缴费总比例是()。
发行人对披露的风险因素应做定量分析,无法进行定量分析的,应有针对性地做出定性描述。()
教育保险又称教育金保险、子女教育保险、孩子教育保险,是以为孩子准备教育基金为目的的保险。下列关于教育保险的说法,错误的是()。
“越陈越香”的普洱茶属于()。
某校开设9门课程供学生选修,其中A,B,C三门上课时间相同,学校规定,每位同学选修4门,共有多少种不同的选修方案?
Globalwarmingisalreadycuttingsubstantiallyintopotentialcropyieldsinsomecountries—tosuchanextentthatitmaybea
最新回复
(
0
)