We’ve heard about radiation from the damaged nuclear reactor
![](images/u2507.png)
We’ve heard about radiation from the damaged nuclear reactors in Japan reaching American shores. Experts say so far there is no reason to worry, and point out that we meet radiation every day. Where and how? NPR’s Renee Montagne posed that question to Peter Caracappa, a radiation safety officer and professor of nuclear engineering. MONTAGNE: How many things emit radiation? Dr CARACAPPA: Well, radiation and radioactive material is a part of nature. So everything that’s living has some amount of radiation coming from it—a very small amout. Plus there’s radiation in the ground and the air. So the extremes are uranium in the soil to bananas? Yes. By the way, why do bananas have radiation? Bananas have a lot of potassium(钾). And a small amount of potassium naturally is called potassium 40, which is radioactive What’s the difference between radiation that’s harmful and not harmful? Well, the term radiation can apply to a lot of different things. But the harmful radiation is ionizing(离子)radiation. It has enough energy that it can make chemical changes in material. We could get ionizing radiation from an X-ray, for example. It’s the kind of radiation that causes cancer. The broader definition of radiation includes a lot of things that we call non-ionizing radiation. That includes everything like radio waves and visible light and your microwave. So what then is the largest contributor of ionizing radiation? For the natural sources of ionizing radiation, actually the biggest chunk of that tends to come from radon(氡), which is a radioactive material that is present in the air. It can become a concern when it builds up in low-lying areas of homes like basements. Would it be fair to say that most people do not need to worry about the danger of being exposed to radiation? I would say that the everyday exposure to radioation that we meet contributes an extremely tiny risk to our life or to our health compared to all of the other risks that we meet in our day-to-day life. 小题1:We can infer from the first paragraph that radiation is______.
|
已提交,审核后显示!提交回复
共1条回复
我不是网评员 共回答了12个问题
|采纳率91.7%- 小题1:D
小题2:A
小题3:B
小题4:D
- 1年前
相关推荐
- prolonged exposure to harmful radiation是什么意思
心灵水手1年前1
-
ZZZZZZ007 共回答了20个问题
|采纳率100%英文:prolonged exposure to harmful radiation
中文:长时间暴露于有害辐射
很高兴为您解答
如果你对这个答案有什么疑问,1年前查看全部
- 名词和分词构成形容词比如是radiation-reducing还是reduced,怎么分辨主被动
真如网线1年前1
-
satan2005 共回答了10个问题
|采纳率90%应该是radiation-reducing或者是radiation-reduction,两个用连词符连接的名词可以当做形容词意义.
没有什么主动和被动的含义.1年前查看全部
- radiation的动词形式和形容词形式
末日将军1年前2
-
hkk2001 共回答了10个问题
|采纳率100%动词:radiate
形容词:radiative1年前查看全部
- After the earthquake, tsunami and radiation leaks, Japan is
After the earthquake, tsunami and radiation leaks, Japan is having a hard time, but the people there
__________ make a new beginning.[ ]A. are decided to
B. are looking forward to
C. are devoted to
D. are determined towang58jing1年前1
-
秋蝶飞 共回答了17个问题
|采纳率82.4%D1年前查看全部
- 英语翻译The effects of increased ultraviolet radiation include a
英语翻译
The effects of increased ultraviolet radiation include an elevated risk of skin and eye cancer in humans and animals,and death or reduced rates of growth in plants and in organisms that live near the surface in water,such as the phytoplankton that consume carbon dioxide and provide about 70 percent of the Earth’s annual production of oxygen.r88081年前1
-
小肥羊YOYO 共回答了21个问题
|采纳率81%增加紫外线辐射的影响,包括人类和动物的皮肤和眼癌的死亡风险升高,或降低生物体生活在水表面的生长率,如消耗二氧化碳的浮游植物.并提供地球的氧气年产量的70%左右.1年前查看全部
- 英语翻译Radiation and chemotherapies that save young women from
英语翻译
Radiation and chemotherapies that save young women from cancer can leave them infertile.But a novel procedure can keep motherhood on ice without delaying treatmentYESPEACE1年前2
-
风尘少俠 共回答了18个问题
|采纳率94.4%辐射和化疗在治疗年轻妇女的癌症时也让他们失去了生育的能力,但是一个新的手术能让处于危险境界的母亲能够及时得到治疗.1年前查看全部
- 英语翻译three variables describe the radiation that is received:
英语翻译
three variables describe the radiation that is received:its intensity,its wavelength and its time dependence.怎么翻?its time dependence这个是什么意思
For thermal emission,the intensity (or radiance) is determined by the temperature and the emissivity of the background,and by the atmospheric species along the path to the
instrument.还有这句,background怎么翻?huyoo11年前1
-
squch 共回答了15个问题
|采纳率100%三个变量描述的辐射的强度,它接收的波长和相应的时间依赖性
its time dependence:它的时间依赖性1年前查看全部
- Radiation Hardened
zhling18161年前1
-
女子纳兰容若 共回答了17个问题
|采纳率94.1%辐射加固1年前查看全部
- help!physics!why do different forms of neclear radiation hav
help!physics!
why do different forms of neclear radiation have different "quality factors"?for example,alpha particles have a quality factor of 20 while gamma rays have a quality factor of 1
用中文来说应该是 为什么不同的核辐射(不好意思,我上面的打错字了,应该是 nuclear)的品质因素都不同?比如 α是 20 γ是
自己翻译的,不通顺的话请见谅zgirlz1年前1
-
mooloody 共回答了18个问题
|采纳率100%factor是不是因子或者系数的意思,alpha particles α 粒子gamma rays γ射线,20和1我不知道什么意思,我物理学的不好,你还是问一问专门学物理的人吧!1年前查看全部
- 英语翻译Radiation amount shall satisfy Unconditional Use Clearan
英语翻译
Radiation amount shall satisfy Unconditional Use Clearance Level for each nuclea kind that is in regulations of IAEA"Internation Atomic Energy Agency" and CEC"Comssion of the European respectivelyrjb2118471年前1
-
fjnhwwx 共回答了15个问题
|采纳率86.7%对于每种核原料来说,辐射量必须满足无限使用清除标准,分别根据国际原子能委员会和欧盟的有关章程1年前查看全部
- 英语问题Nuclear radiation is said _____ the biggest health chall
英语问题
Nuclear radiation is said _____ the biggest health challenge in Japanese Earthquake over the past few months
A being B to be Cto have been Dthat it is
那个C have been 表示什么意思啊 为什么不能选Bxojune1年前2
-
bbsiji 共回答了16个问题
|采纳率81.3%to have been 意思是已经成为
之所以用to have been是因为跟句末的over the past few months.这是从过去到现在的一段时间,应当与完成时搭配
过去几个月以来,核辐射已经成为.1年前查看全部
- __high levels of radiation can lead to serious health breakd
__high levels of radiation can lead to serious health breakdown.A.exposing to B.being exposed to
C.to expose to D.exposed to二伢子1年前1
-
花开只一次 共回答了21个问题
|采纳率90.5%选B1年前查看全部
- radiation is the transfer of heat energy from one place of r
radiation is the transfer of heat energy from one place of ro another without particles being used.
翻译一下,谢了天之翼20081年前2
-
罐水无双 共回答了17个问题
|采纳率82.4%辐射是指在无粒子作为媒介的情况下,将热能从一个地方传递到另一个地方.1年前查看全部
- A regular drop in the sun’s radiation(辐射) can cause unusuall
A regular drop in the sun’s radiation(辐射) can cause unusually cold winters in parts of North America and Europe, scientists say, a finding that could improve long-range forecasts and help countries prepare for snowstorms.
Scientists have known for a long time that the sun has an 11-year cycle during which radiation measured by sunspots on the surface reaches a peak then falls. But explaining a clear connection to weather is harder.
“Our research confirms the observed connection between solar change and regional winter climate,” lead author Sarah Ineson of the UK Met Office told the reporters in an email. The study was published in the magazine Nature Geoscience on Monday.
The researchers found that the reducing of ultraviolet(UV,紫外线) radiation from the sun can affect high-altitude wind patterns in the Northern Hemisphere(半球), causing cold winters.
“While UV levels won’t tell us what the day-to-day weather will do, they show us the bright future of improved forecasts for winter conditions for months and even years ahead. These forecasts play an important role in long-term possibility planning,” Ineson, a climate scientist, said.
Ineson and colleagues from Imperial College London and the University of Oxford used satellite data that more accurately(精确的) measures UV radiation from the sun and found a much greater change than previously thought.
They found that in years of low activity, unusually cold air forms high in the atmosphere over the tropics. This causes a redistribution(重新分配) of heat in the atmosphere, making easterly winds that bring freezing weather and snowstorms to northern Europe and the United States and milder weather to Canada and the Mediterranean.
When solar UV radiation is stronger, the opposite occurs.
More study was needed, though. A key uncertainty in the experiment lay in the satellite data used, because it covers only a few years. “So questions remain concerning both accuracy(精确) and also applicability to other solar cycles,” she said.
小题1:The new finding claims cold winters in the North Hemisphere can be caused by ______.A.a sharp rise in the amount of sunspots B.a drop in the sun’s UV radiation C.a complex computer model simulation D.a clear link between the sun and the earth A.UV radiation can affect high-altitude wind patterns B.there’s a clear connection between the sun’s activity and weather C.the sun’s radiation reaches a peak every eleven years D.they can predict day-to-day weather conditions from UV levels A.Canada and the Mediterranean will have milder weather. B.The whole Northern Hemisphere will suffer from extreme winter days. C.Freezing cold weather will appear in northern Europe. D.Burning hot weather will appear in the United States. A.researchers have analyzed the data collected in eleven years B.long-term weather conditions can be accurately predicted depending on UV levels C.the research doesn’t seem correct and true enough due to limited satellite data used D.climate scientists have just begun their research in severe weather forecast byll1年前1
-
紫气东东来 共回答了19个问题
|采纳率78.9%小题1:B
小题2:C
小题3:D
小题4:C
1年前查看全部
- 英语翻译Exposure to low-intensity gamma radiation slows the rate
英语翻译
Exposure to low-intensity gamma radiation slows the rate of growth of the spoilage microorganisms in food in much the same way that the low heat used in pasteurization inhibits the spoilage action of the microorganisms in milk.就是从语法角度,象哪些是主谓宾什么的apple_dg1年前2
-
xue1970 共回答了18个问题
|采纳率88.9%Exposure to low-intensity gamma radiation为主语,其中不定式to low-intensity gamma radiation作Exposure的定语;slows为谓语;the rate of growth of the spoilage microorganisms in food 为宾语,其中of growth of the spoilage microorganisms in food作the rate的定语;in much the same way 相似的方法,后接一个同位语从句.1年前查看全部
- We must to something to stop the serious nuclear radiation f
We must to something to stop the serious nuclear radiation from japan改为被动语态
hibbins1年前4
-
zheng571337 共回答了20个问题
|采纳率95%We must to something to stop the serious nuclear radiation from japan会不会写错了呢?应该是
We must do something to stop the serious nuclear radiation from Japan吧?
如果这样的话,即改成:
Something must be done by us to stop the serious nuclear radiation from Japan.1年前查看全部
- Radiation 可数吗
春润1年前2
-
secondgired 共回答了20个问题
|采纳率85%可数,例如
each subarray includes packaging suite and at least a radiation unit row within it;
每个子阵列包括封装套件和设置在封装套件内的至少一个辐射单元列;1年前查看全部
- 请教两个英语术语:radiation 和irradiation有何异同?
zz的声音1年前1
-
为啥收不到密码 共回答了16个问题
|采纳率81.3%adiation
n.
放射,辐射; 发射; 发光
放射物; 辐射线[能]
散射器
【生】辐射形;【测】射出测量法;【医】射线疗法
语义扩展; 语义推演
irradiation
n.
放射,照射
阐明,启发; 启迪
【物】光渗; 光线; 辐照[射]
【医】照射
扩散
这样看不出来什么区别吧?
其实通俗一点讲 虽然两词都有照射的意思 但是radiation是 "主动"的发出照射的一方,而irradiation强调 "被动"被照射的物体,那个被照射的也可以说是 have been irradiated.
Radiation is emitted from something and travels from its point of origin to somewhere else.
When radiation hits something else (and is therefore stopped) the thing that has been hit is said to have been irradiated.
举个例子
A sunbather is undergoing irradiation by radiation emitted by the sun.1年前查看全部
- prolonged exposure to harmful radiation是什么意思
1daodao1年前1
-
yliun 共回答了16个问题
|采纳率100%英文:prolonged exposure to harmful radiation
中文:长时间暴露于有害辐射
很高兴为您解答
如果你对这个答案有什么疑问,1年前查看全部
- Under the threat of the radiation,it is too a_____for you to
Under the threat of the radiation,it is too a_____for you to fly back to Japan
单词填空吖吖吖AVee1年前5
-
wjkeyu 共回答了19个问题
|采纳率94.7%adventurous [əd'ventʃərəs]
基本翻译
adj.爱冒险的;大胆的;充满危险的1年前查看全部
- 英语翻译1.The radiation dose,if radiation sterilization will be
英语翻译
1.The radiation dose,if radiation sterilization will be used,and if it has been determined.processed into finished form for purchase .
这是一段医疗设备的申请说明.请高手翻译一些,zq198411148881年前1
-
xiaoxiao4750 共回答了17个问题
|采纳率82.4%放射【辐射】用剂量.
如果已经决定生产使用辐射灭菌技术,将按照制成成品规格购买.1年前查看全部
- 英语翻译Radiation把它翻译成中文,比如umbrella为安布雷拉,遮阳伞等,把这个英文翻译成汉语,有点创意,大气
英语翻译
Radiation把它翻译成中文,比如umbrella为安布雷拉,遮阳伞等,把这个英文翻译成汉语,有点创意,大气点的,clifford1年前4
-
zhshuiyu 共回答了19个问题
|采纳率100%雷迪安森,雷迪艾森 辐射1年前查看全部
- the sun sensor measures the intensity of solar radiation in
the sun sensor measures the intensity of solar radiation in real time when the intensity of the lig
是什么意思 帮忙说一下我JAY迷1年前2
-
多宝鱼头 共回答了23个问题
|采纳率87%the sun sensor measures the intensity of solar radiation in real time when the intensity of the light.
句子翻译:太阳传感器测量实时监测太阳光辐射的强度,当光的强度.1年前查看全部
- 翻译New Drug Protects against Radiation Damage
258w31年前1
-
喜欢开心 共回答了31个问题
|采纳率93.5%新的药物可以保护我们不受辐射损伤1年前查看全部
- laser radiation when open AVOID DIRECT EXPOSURE TO BEAM
丫丫还记得吗1年前2
-
badboy321 共回答了10个问题
|采纳率90%打开激光辐射避免直接暴露在光束1年前查看全部
- 跪求文章检索号 The Radiation Attenuation and Energy Gain for Crysta
跪求文章检索号 The Radiation Attenuation and Energy Gain for Crystallie Undulator Field
补充,是EI检索号是与非的边缘1年前1
-
漫游天宇 共回答了16个问题
|采纳率81.3%Accession number:20103113111069
Title:The radiation attenuation and energy gain for crystalline undulator field
Authors:Zhang,Mei1 ; Luo,Xiao-Hua2,3 ; Luo,Shi-Yu1 ; Shao,Ming-Zhu1
Source title:Faguang Xuebao/Chinese Journal of Luminescence
Volume:31
Issue:3
Issue date:June 2010
Publication year:2010
Pages:454-458
Language:Chinese
ISSN:10007032
CODEN:FAXUEW
Document type:Journal article (JA)
Publisher:Chines Academy of Sciences,Southeast Lake Heading on 16th,Chungchun City,130033,China
Number of references:12
Main heading:Radiation
Controlled terms:Crystalline materials - Electrons - Equations of motion - Free electron lasers - Laser theory - Lasers - Projectiles - Wigglers
Uncontrolled terms:Attenuation lengths - Chaotic behaviour - Classical field theory - Crystal length - Dechanneling - Energy gain - Field radiation - Gain factors - Global bifurcations - Ionization loss - Non-Linearity - Particle motions - Radiation attenuation - Spectral distribution - Spontaneous radiation - Thermal oscillations - Undulator radiation - Undulators
Classification code:933.1 Crystalline Solids - 744.1 Lasers,General - 744.5 Free Electron Lasers - 921.2 Calculus - 931.1 Mechanics - 931.3 Atomic and Molecular Physics - 932.1.1 Particle Accelerators - 711 Electromagnetic Waves - 657.1 Solar Energy and Phenomena - 654 Rockets and Rocket Propulsion - 531.2 Metallography - 482.2 Minerals - 404.1 Military Engineering - 701.1 Electricity:Basic Concepts and Phenomena
Database:Compendex1年前查看全部
- __high levels of radiation can lead to serious health breakd
__high levels of radiation can lead to serious health breakdown.
A.exposing to
B.being exposed to
C.Exposed to
为什么不能选C 不是being done 不能放在句首么sthyyrq1年前2
-
妹妹0525 共回答了25个问题
|采纳率84%只有动名词才能作主语,过去分词不能作主语的,being exposed to是动名词的被动语态作主语1年前查看全部
- 英语翻译Radiation and Temperature the crop is amply supplied wit
英语翻译
Radiation and Temperature the crop is amply supplied with water and nutrients and is freeof weeds,pests and diseases.Its growth rate depends only on the current state of the crop and current radiation andtemperature conditions.At full cover,the growth rate of field crops is typically between 150 and 350 kg·ha-1·d-1 of drymatter,which is defined as the potential growth rate and the associated yield as potential yield.iuer9821年前1
-
peitao 共回答了13个问题
|采纳率100%这种作物只需要太阳辐射,温度和水.它不用除杂草,也不必担心害虫和生病.它的生长率仅取决于作物的生长状况和现在的辐射和温度条件.总的来说,这种农作物的生长速率介于每天每公顷干重150千克和350千克之间.这是通过正常的生长速率和正常的土地来测算的.1年前查看全部
- 英语翻译SSE HRZ diffuse radiation on horizontal surface (average
英语翻译
SSE HRZ
diffuse radiation on horizontal surface (average,Min,Max)
direct normal radiation (average,Min,Max)danshenya0381年前1
-
驿动末班车 共回答了18个问题
|采纳率77.8%SSE HRZ 应该是NASA的一个数据库
SSE 是Surface Meteorology and Solar Energy的缩写,HRZ是 Horizontal
在水平表面的扩散辐射 (平均值, 最小值, 最大值)
直接常态辐射(平均值, 最小值, 最大值)1年前查看全部
- In the photon picture of radiation,show that if beams of rad
In the photon picture of radiation,show that if beams of radiation of two different wavelengths are to have the same intensity (or energy density) then the numbers of the photons per unit cross-sectional areas per sec in the beams are in the same ratio as the
wavelength.请详细一点证明下了,caitou1121年前2
-
xljblog 共回答了19个问题
|采纳率78.9%Etot=nhf(f is frequecy,h is planck constant.)
f=c/λ (c is the speed of the light and λ is wavelenth)
so Etot=nhc/λ
As the question told
E1=E2
hence
n1*hc/λ1=n2*hc/λ2
as h*c is constant
cancel out we get
n1/λ1=n2/λ2
rearrange
n1/n2=λ1/λ21年前查看全部
- 请帮忙查一篇文章EI检索号 The Radiation Attenuation and Energy Gain for
请帮忙查一篇文章EI检索号 The Radiation Attenuation and Energy Gain for Crystallie Undulator
骑兵不带刀1年前1
-
公里自在人心 共回答了16个问题
|采纳率75%估计是这个.
还有,题目写错了.应该是:
The Radiation Attenuation and Energy Gain for Crystalline Undulato1年前查看全部
大家在问
- 1下列各组数中,-62与(-6)2,(-5)3与-53,050与0100,(-1)97与(-1)98,-(-2)3与23,
- 2英语翻译比如说:因为我的无理而使你生气了
- 3“说”是古代一种议论的文体,往往就() ()或()发表见解或抒发感情
- 4质量为m、电荷量为q的质点,在静电力作用下以恒定速率v沿圆弧从A点运动到B点,其速度方向改变的角度为θ(弧度),AB弧长
- 5英语翻译发光的不一定是金子,但是是金子总会发光的
- 6童趣这一课,你认为作者是什么样的人
- 7(2011•长春)平放在地面上的直角三角形铁板ABC的一部分被沙堆掩埋,其示意图如图所示.量得∠A为54°,斜边AB的长
- 8初三英语作文:How to keep safe on the way to and from sc
- 9trizol提取烟草组织100mg叶片总RNA,最终浓度大概多少?30ul溶解RNA.每次提的OD260/OD280较低
- 10四分之一磅烟丝 英语怎么说
- 11Without rain,firemen will not have any water to put out fire
- 12— The room is ______ clean ______ it was yesterday.
- 13Al与水反应可逆吗铝和水会反应吗?这个反应可逆吗
- 14植物细胞能同化生成尿素吗
- 15(2012•西城区模拟)如图是一木杆在一天中不同时刻阳光下的影子,按时间顺序排列正确的是( )