首页
登录
职称英语
A summary of the physical and chemical nature of life must begin, not on th
A summary of the physical and chemical nature of life must begin, not on th
游客
2023-12-01
21
管理
问题
A summary of the physical and chemical nature of life must
begin, not on the Earth, but in the Sun; in fact, at the Sun’s very
center. It is here where is to be found the source of the energy that【S1】______
the Sun constantly pours out into the space as light and heat. This【S2】______
energy is liberated at the center of the Sun as billions on billions of【S3】______
nuclei of hydrogen atoms collide with each other and fuse together to
form nuclei of helium, and, in doing so, releases some of the energy【S4】______
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 are【S5】______
converted into helium in the Sun every second. This the Sun has
been done for several thousands of millions of year.【S6】______
The nuclear energy is released at the Sun’s center as high-
energy gamma radiation, a form of electromagnetic radiation like
light and radio waves, only of very much short wavelength. This【S7】______
gamma radiation is absorbed by atoms inside the Sun, to be
reemitted at slight longer wavelengths. This radiation, in its turn, is【S8】______
absorbed and remitted. As the energy filters through the layers of
the solar interior, it passes through the x-ray part of the spectrum,
and eventually becoming light. At this stage, it has reached that we【S9】______
call the solar surface, and can escape into space, without being
absorbed further by solar atoms. A very small fraction of the Sun’s
light and heat emitted in such directions that, after passing【S10】______
unhindered through interplanetary space, it hits the Earth. [br] 【S6】
选项
答案
done—doing
解析
语态错误。这句话的意思是“太阳这样运作已经有成千百万年了”,是主动语态,hasbeen doing表示“一直这样做,还在继续”,所以使用doing。
转载请注明原文地址:https://tihaiku.com/zcyy/3234317.html
相关试题推荐
Thephysicaldistancebetweenspeakerscanindicateanumberofthingsandcana
Theloveofbeautyisanessentialpartofallhealthyhumannature.Itisamor
Thenatureofworkischanging.Recenttechnologicaladvances,ashiftfrom
Thenatureofworkischanging.Recenttechnologicaladvances,ashiftfrom
Thenatureofworkischanging.Recenttechnologicaladvances,ashiftfrom
Thenatureofworkischanging.Recenttechnologicaladvances,ashiftfrom
Thenatureofworkischanging.Recenttechnologicaladvances,ashiftfrom
Whenmostanimalsdie,naturelikestotidyupbymakingtheirbodiesdisapp
PASSAGEFOUR[br]Howdotheabnormalchemicalbondsform?Freeradicalsproduced
PASSAGETHREE[br]Whatisthenatureoftheactionofthepaint,accordingtot
随机试题
FormostofAmericanhistory,businesseswereruntoprovidelivelihoodsan
______enoughtimeandmoney,theresearcherswouldhavebeenabletodiscoverm
[originaltext]W:WelcometoourTVshow,BookClub.Todaywearehonoredtohav
Youhavemademylifeso(misery)______thatIcannotputupwithyouanymore.m
马歇尔试件的质量为1200g,高度为65.5mm,制作标准高度为63.5mm的试
下列关于上市开放式基金(LOF)的描述中不正确的是()。A:可以在场外市场进行基
共用题干 一般资料:求助者,女性,42岁,已婚,大学文化程度,某公司业务经理。
A.自身抗原 B.同种异型抗原 C.超抗原 D.独特型抗原 E.异嗜性抗
根据规定,在破产程序中,债权申报的法定期限最长是()。A.自受理破产申请公
下列各项,《水污染防治法》未作禁止规定的是()。A.向水体排放热水 B.向水
最新回复
(
0
)