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
2024-11-12
1
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] 【S5】
选项
答案
are—be
解析
虚拟语气错误。本句谓语是requires,后接that引导的从句,谓语应该使用should+动词原形,should可以省略。
转载请注明原文地址:https://tihaiku.com/zcyy/3842611.html
相关试题推荐
Itisaknownfactthatphysicalactivityimprovesoverallhealth.Notonly
Itisaknownfactthatphysicalactivityimprovesoverallhealth.Notonly
Itisaknownfactthatphysicalactivityimprovesoverallhealth.Notonly
Itisaknownfactthatphysicalactivityimprovesoverallhealth.Notonly
Asummaryofthephysicalandchemicalnatureoflifemustbegin,notonth
Asummaryofthephysicalandchemicalnatureoflifemustbegin,notonth
Asummaryofthephysicalandchemicalnatureoflifemustbegin,notonth
Asummaryofthephysicalandchemicalnatureoflifemustbegin,notonth
Asummaryofthephysicalandchemicalnatureoflifemustbegin,notonth
Asummaryofthephysicalandchemicalnatureoflifemustbegin,notonth
随机试题
Themillionsofinternallydisplacedpersonsfacethesamefateasthatofrefug
Ifsomethingurgenthappensthatpreventsyoufromkeepingtheappointment,you
There’samanatthereceptiondeskwhoseemsveryangryandIthinkhemeans__
Standardsforcommercialeggproductionvarygreatlyaroundthecountry.In
Theterme-commercereferstoallcommercialtransactionsconductedoverthe
图式刚架,各杆线刚度i相同,则结点A的转角大小为:
( )可以人民币、美元或其他主要外汇货币为计价货币募集。A.QDII基金 B
汉字源远流长,下列字体按出现时间先后顺序排列正确的是: A.②①④③ B.①
《中共中央国务院关于加强耕地保护和改进占补平衡的意见》中要求,到2020年全国下
下列设备中,属于塔式光热发电设备的是( )。A.定日镜 B.集热器 C.反
最新回复
(
0
)