首页
登录
职称英语
A 【B1】______of the physical and chemical nature of life must begin; not on
A 【B1】______of the physical and chemical nature of life must begin; not on
游客
2023-07-16
12
管理
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】______. [br] 【B7】
选项
答案
wavelength
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2842149.html
相关试题推荐
Thirtyyearsago,anyoneblaminglonelinessforphysicalillnesswouldhave
Thirtyyearsago,anyoneblaminglonelinessforphysicalillnesswouldhave
Thirtyyearsago,anyoneblaminglonelinessforphysicalillnesswouldhave
Thirtyyearsago,anyoneblaminglonelinessforphysicalillnesswouldhave
Thirtyyearsago,anyoneblaminglonelinessforphysicalillnesswouldhave
Womennotinimmediatephysicaldangerwereconsideredprivilegedenoughandthe
[originaltext]Throughouthistorymanhaschangedhisphysicalenvironmenti
______,manylawsofnatureactuallyexist.A、HavingnotdiscoveredB、Nothaving
Stressmaybedefinedasanemotional,intellectual,orphysicalreactionto
Stressmaybedefinedasanemotional,intellectual,orphysicalreactionto
随机试题
Choosethecorrectletter,A,BorC.MuseumofAnthropology[br]Themuseumis
ABNAmroisnottheonlybig,flounderingbankunderfire.AcrosstheAtlant
Femi,MartinandJamescatchtrainstogotothesamedestination.Femicatches
[originaltext]W:Goodmorning.I’djustliketoaskyouafewquestionsabouty
能够切割金属与非金属材料,且能切割大厚工件的切割方法为()A.氧熔剂切割 B.
急性肾功能衰竭无尿期的治疗原则中,不包括A.高蛋白、高脂肪、高维生素饮食 B.
围绝经期崩漏,多属A.气血虚弱 B.肾虚肝郁 C.脾肾亏损 D.肝
根据《建设工程企业资质管理制度改革方案》,关于施工企业资质的说法,正确的是(
A.Km减小,Vmax减小 B.Km增大,Vmax增大 C.Km减小,Vma
体内dTMP合成的直接前体是A、DUMP B、TMP C、UDP D、UM
最新回复
(
0
)