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
Why does the speaker say that radiation is similar to radio waves?
Why does the speaker say that radiation is similar to radio waves?
admin
2012-06-09
33
问题
Why does the speaker say that radiation is similar to radio waves?
Nuclear reaction is no longer an alien concept for us. It can not be detected by human senses. We cannot see or touch it. Radiation is similar with radio waves. Radio waves can not be sensed without a radio receiver. Radioactivity can not be sensed without a radiation detector. On the other side, there is a big difference between radio waves and radiation. Radiation is harmful to people’s health and other living things. Radiation at high levels can even kill living things by killing masses of cells in important organs before people know the damage in their bodies. No level of radiation is completely safe. If the cells are badly hit by radiations of low levels, the dead cells will be replaced by the healthy cells in your body. But if the cells are killed by high levels of radiation, the cells may produce themselves in an unusually way, and these cells may become cancerous. This is the origin of our increased risk in cancer, as a result of radiation exposure.
We have studied radiation for nearly 100 years now. We know radiation does lots of damage. The hurt can be passed on from generation to generation. A child can be born very weak or easy to get serious illness as a result of radiation absorbed by its grandparents. Nowadays, the scientists have been exploring new ways to deal with the radiation. They are trying to find out ways to prevent the damage of radiation to human being’s health. To thoroughly solve the problem of radiation, more effort still needs to be taken.
选项
A、Cancer can be passed on to the next generation.
B、Senior citizens are more vulnerable to the hurt of radiation.
C、The impact of radiation can be accessible over generations.
D、Scientists have found out solutions to radiation.
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/Rrxd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
About50yearsagotheideaofdisabledpeopledoingsportswasneverheardof.Butwhentheannualgamesforthedisabledwere
Thehouseandcarriageisathingofthepast.butloveandmarriagearestillwithusandstillcloselyinterrelated.MostAmer
Duringtheearlyperiodoftheearth’shistory,theweatheronearthapparentlyfluctuatedbetweenbrightsunandshowers.Inre
Whenamagazineforhigh-schoolstudentsaskeditsreaderswhatlifewouldbelikeintwentyyears,theysaid:machineswouldbe
Scholarsandstudentshavealwaysbeengreattravellers.Theofficialcasefor"academicmobility"isnowoftenstatedinimpres
Sharkshavegainedanunfairreputationforbeingfiercepredatorsoflargeseaanimals.Humanity’sunfoundedfearandhatredof
hatredandpassion
hatredandpassion
随机试题
A)InDecemberof1869,CongressappointedacommissiontoselectasiteandprepareplansandcostestimatesforanewStateD
细胞免疫功能的测定不包括
金黄色葡萄球菌肺炎在X线胸片上有哪些特征
29岁女性。原发不孕,自述自幼瘦弱,平时月经欠规律,2~5d/30~60d,最近感觉低热乏力。检查子宫未产型中位,不活动,双附件索条增粗,为确诊生殖器结核,下列检查和分析哪项不正确
设A,B满足A*BA=2BA一8E,其中,求矩阵B。
设f(x)在(-∞,+∞)连续,以T为周期,令F(x)=f(t)dt,求证:(Ⅰ)F(x)一定能表成:F(x)=kx+φ(x),其中k为某常数,φ(x)是以T为周期的周期函数;(Ⅱ)f(x)dx;(Ⅲ)若又有f(x)≥0(x∈(-∞,+∞)),n为自
执行下列语句段后,输出字符“*”的个数是()。for(inti=50;i>1;i-=2)cout
A、Lauradoesn’tunderstandtheproposal.B、Laurawillnotaccepttheproposal.C、Laurawillaccepttheproposal.D、Laura’spropo
A、Aphotographer.B、Aburglar.C、Areporter.D、Aprofessor.B信息明示题。文章最后指出,hewasthemostaccomplishedburglar,由此可知Penury是个夜贼,所
HowPsychologyCanHelpthePlanetStayCool[A]"I’mnotconvincedit’sasbadastheexpertsmakeout...It’severyoneelse
最新回复
(
0
)