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
A 【B1】______of the physical and chemical nature of life must begin; not on the Earth,: but in the Sum In fact, it is. at the Sun
A 【B1】______of the physical and chemical nature of life must begin; not on the Earth,: but in the Sum In fact, it is. at the Sun
admin
2013-01-20
29
问题
A 【B1】______of the physical and chemical nature of life must begin; not on the Earth,: but in the Sum In fact, it is. at the Sun% very center. It is here that is to be found the source of the energy that the Sun【B2】______pours out into space as light and heat. This energy is liberated at the center of the Sun as billions upon billions of nuclei of【B3】______atoms collide with each other and fuse together to form nuclei of helium(氦). And, in doing so, it【B4】______some of the energy that is stored in the nuclei of atoms. The output of light and heat of the Sun requires that some 600 million tons of hydrogen be【B5】______into helium in the Sun every second. This the Sun has been doing for several thousands of millions of years.
The nuclear energy is released at the Sun’s center as high-energy gamma【B6】______, a form of electro-magnetic radiation like light and radio waves, only of very much shorter【B7】______. This gamma radiation is【B8】______by atoms inside the Sun, to be re-emitted at slightly longer wavelengths. This radiation, in its turn, is absorbed and reemitted.【B9】______, it passes through the X-ray part of the spectrum(频谱), eventually becoming light. At this stage, it has reached what we call the solar surface and can escape into space,【B10】______. A very small fraction of the Sun’s light and heat is emitted in such directions【B11】______.
【B11】
选项
答案
that after passing through space, it hits the Earth.
解析
转载请注明原文地址:https://kaotiyun.com/show/RLu7777K
0
大学英语四级
相关试题推荐
TheArtofFriendshipMakingFriendsinMidlifeOneeveningafewyearsagoIfoundmyselfinananxiety.Nothingwasreall
A、Somethingsmall.B、Somethingsweet.C、Somethingtypicalinyourcountry.D、Somethingvaluableinyourcountry.C细节辨认题。女士说自己初到美
RussiaisthelargesteconomicpowerthatisnotamemberoftheWorldTradeOrganization.Butthatmay【B1】______.LastFriday,
RaisingWiseConsumersAlmostanyonewithaprofitmotiveismarketingtoinnocents.Helpyourkidsunderstandit’sOKnott
Tobefrank,IshouldsayBobis______(与其说是个作家不如说是个记者).
A、Apsychologist.B、Ahairdesigner.C、Alawyer.D、Acook.A职业身份题。男士自我介绍说自己是医生,并问女士需要什么帮助;女士开始抱怨自己的婆婆对自己的挑剔,并问男士该怎么做。由此可以推断,男士是一
Culturalinvasionislikelyto______(对文化多样性产生消极的影响).
Theprospectsforwomenwhoarescientistsandengineersatmajorresearchuniversitieshaveimproved,althoughwomencontinuet
Thirtyyearsago,anyoneblaminglonelinessforphysicalillnesswouldhavebeenlaughedat.Butasscientistsstudieddifferent
Stressmaybedefinedasanemotional,intellectual,orphysicalreactiontochangeordemands.Thestressreactionpreparesthe
随机试题
桃核承气汤证的病机是
商阳穴位于
举例说明抗心律失常药的分类。
不属于现代机械安全应具有的特性是()。
建筑装饰装修工程多采用()为计算基础的计价。
下列关于地铁防火的相关描述错误的有()。
从规避投资风险的角度看,债券投资组合的主要形式有( )。
简述影响服从的因素。
2016年某市一次有关市民邻里关系的调查显示,在受访的951位市民中,“没有邻居”的有6位。“有邻居”的受访市民中,对邻居表示“了解”的占55.8%(“了解”分“很了解”和“部分了解”,占比分别为26.9%和28.9%),其余的表示“不了解”;对邻里关系表
下列数据结构中,能够按照“先进后出”原则存取数据的是()。
最新回复
(
0
)