首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
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
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
admin
2017-06-15
43
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.
【S3】
选项
答案
on—upon
解析
介词误用。一般情况下on和upon可以互换,但在一些约定俗成的固定结构中不可以互换,billions upon billions是固定搭配,表示“数十亿计的”,类似的还有thousands upon thousands,millionsupon millions。
转载请注明原文地址:https://kaotiyun.com/show/zQsK777K
0
专业英语八级
相关试题推荐
IthoughtthatitwasaSundaymorninginMay,thatitwasEasterSunday,andasyetveryearlyinthemorning.Iwasstandinga
Thenforalittlewhilethehousefeelshugeandempty,andIwonderwheremyselfishiding.
Youngpeoplearefacinganuncertainfuture.Asthe21stcenturydawned,theywerepromisedawealthofprospectsunless【M1】____
Youngpeoplearefacinganuncertainfuture.Asthe21stcenturydawned,theywerepromisedawealthofprospectsunless【M1】____
Thebrainsofchildrenareaffectedbyfamilyviolenceinthesamewayascombataffectssoldiers,accordingtoastudy.Inbot
Americansfinditdifficulttoengageinanyactivityforpurepleasure.Wehavetohaveahigheraim—apurpose—foreverymome
Thenatureofworkischanging.Recenttechnologicaladvances,ashiftfrommanufacturingtoservice-basedorganizations,incr
PoetryNowadays,weliterarycriticsaresaidtotalklittleaboutactualliterature.Today,Ireallywanttofocusonpoet
PoetryNowadays,weliterarycriticsaresaidtotalklittleaboutactualliterature.Today,Ireallywanttofocusonpoet
随机试题
中度贫血的标准是Hb()。
化疗药物的分类中,错误的是
一质量未知的托盘挂在弹簧上,如图所示,当盘上放一质量为m1
背景某钢厂将一条年产100万t宽厚板轧制生产线的建设项目,通过招标方式,确定该项目中的板坯加热炉车间和热轧制车间交由冶金施工总承包一级资质的企业实施总承包,负责土建施工,厂房钢结构制作、安装,车间内300t桥式起重机的安装,设备安装与调试,三电工
关于贷款项目评估的意义,下列表述不准确的是()。
达尔文的《物种起源》,其观点是()。
在世界范围内禁止生产各种破坏臭氧层的化学物质可能仅仅是一种幻想。大量这样的化学物质已经生产出来,并且以成千上万台冰箱的冷却剂的形式而存在。当这些化学物质到达大气层中的臭氧层时,其作用不可能停止。因此,没有任何方式可以阻止这类化学物质进一步破坏臭氧层。
下列对所有权关系的判断,错误的是( )。
有些外科手术需要一种特殊类型的线带,使外科伤口缝合达到10天,这是外科伤口需要线带的最长时间。D型带是这种线带的一个新品种。D型带的销售人员声称D型带将会提高治疗功效,因为D型带的黏附时间是目前使用的线带的两倍长。以下哪项如果成立,最能说明D型带销
当前最为常用的电信租用线路有哪些?为了总部和两家分公司进行网络互通,可以采用的动态路由协议有哪些?
最新回复
(
0
)