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
2024-02-17
6
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] 【B10】
选项
答案
without being absorbed further by solar atoms.
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3458418.html
相关试题推荐
Thirtyyearsago,anyoneblaminglonelinessforphysicalillnesswouldhave
Thirtyyearsago,anyoneblaminglonelinessforphysicalillnesswouldhave
Thirtyyearsago,anyoneblaminglonelinessforphysicalillnesswouldhave
Thirtyyearsago,anyoneblaminglonelinessforphysicalillnesswouldhave
Thirtyyearsago,anyoneblaminglonelinessforphysicalillnesswouldhave
Thirtyyearsago,anyoneblaminglonelinessforphysicalillnesswouldhave
Womennotinimmediatephysicaldangerwereconsideredprivilegedenoughandthe
[originaltext]Throughouthistorymanhaschangedhisphysicalenvironmenti
[originaltext]Throughouthistorymanhaschangedhisphysicalenvironmenti
Stressmaybedefinedasanemotional,intellectual,orphysicalreactionto
随机试题
NocountryintheworldhasmoredailynewspapersthantheUSA.Thereareal
[originaltext]T:Infact,there’saverygoodbookonhowtowritequestionnair
Throughouthistorymanhashadtoacceptthefactthatalllivingthingsmus
某同步总线的时钟频率为100MHz,宽度为32位,地址/数据线复用,每传输一个地
以加固围岩为目的的注浆宜采用强度高、耐久性好的双浆液。
水工混凝土配合比设计参数包括( )等。 A、水灰比 B、水砂比 C、
一般来说,教师所扮演的职业角色不包括()。 A.朋友角色B.示范者角色
可复性牙髓炎对下列哪项刺激最敏感A.温度测试 B.探诊 C.咬诊 D.叩诊
根据《水工建筑物滑动模板施工技术规范》(SL32-2014),操作平台防护栏杆高
仪表设备安装要求不包括()。A.直接安装在设备合管道上的仪表安装完毕应进行压力
最新回复
(
0
)