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
2023-11-29
57
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/3228054.html
相关试题推荐
Thenatureofworkischanging.Recenttechnologicaladvances,ashiftfrom
Thenatureofworkischanging.Recenttechnologicaladvances,ashiftfrom
Thenatureofworkischanging.Recenttechnologicaladvances,ashiftfrom
Thenatureofworkischanging.Recenttechnologicaladvances,ashiftfrom
Thenatureofworkischanging.Recenttechnologicaladvances,ashiftfrom
Thenatureofworkischanging.Recenttechnologicaladvances,ashiftfrom
Asummaryofthephysicalandchemicalnatureoflifemustbegin,notonth
Asummaryofthephysicalandchemicalnatureoflifemustbegin,notonth
Asummaryofthephysicalandchemicalnatureoflifemustbegin,notonth
Asummaryofthephysicalandchemicalnatureoflifemustbegin,notonth
随机试题
WhydidthemangotoSeychelles?[br][originaltext]Chris:I’veheardthatyo
安全检查的内容是()。A.查思想 B.查管理和查隐患 C.查方案 D.查
下列属于的发育阶段之一的是A.尖牙 B.组牙 C.开 D.替牙 E.正中
金融资产管理公司作为以经营不良资产为主要业务的银行金融机构,一般金融机构所具有的
AA BB CC DD
期货公司董事、监事和高级管理人员在任职期间擅离职守,造成严重后果的,中国证监会及
年轻恒牙牙髓组织特点中正确的是A、髓腔大,组织疏松,纤维成分多,细胞成分少 B
公共题干: “集装箱号”栏应填( ). A.YMLU4456789(1
某公司决定通过内部招募来填补职位空缺,适用的方法是()。A.发布媒体广告 B
火力发电厂采用柴油发电机作交流保安电源时,需对柴油机1h的负载能力(1.1px进
最新回复
(
0
)