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、They studied variations in the appearance of the parent stars. B、They were able to see the planets with a telescope. C、They co
A、They studied variations in the appearance of the parent stars. B、They were able to see the planets with a telescope. C、They co
admin
2010-08-04
39
问题
M: Doctor Cole, thank you for agreeing to this interview for the Daily Campus News. Can you tell us about what you and your colleagues discuss at the annual astronomy society meeting last month?
W: Yes. For the first time ever the scientific community has established the existence of planets outside our own solar system. of course we knew that certain distant stars existed but only recently did we learn that several of them are orbited by their own planets.
M: Why did it take so long to locate these planets?
W: Well, you have to understand that they are a billion times dimmer than their parent stars. It would be like trying to see the light of a candle next to a huge explosion. We don’t currently have a telescope that can be used to see them.
M: But if the astronomers didn’t see the planets through a telescope, how did they find them?
W: Bra very indirect method. The astronomers measured subtle distortions in the frequency of the light from the parent stars and observed that some of the stars seem to rock back and forth, They determined that this was caused by gravitational pull from orbiting planets.
M: There is a powerful new telescope being built in Arizona. Will that help them see these planets?
W: They should be able to see them at least in the form of small spots of light. And then the scientists will be able to break down and analyze this light. By doing this, they hope to learn about the chemical composition of these planets--oxygen and ozone molecules, for example, would be telltale signs of life on these planets.
M: I’m looking forward to hearing more when the telescope is in operation. And I’m sure our readers would be interested too.
选项
A、They studied variations in the appearance of the parent stars.
B、They were able to see the planets with a telescope.
C、They compared the parent stars to the Sun.
D、They sent astronauts on a mission into space.
答案
A
解析
综合推断题。女士说天文学家是通过间接方法来发现那些行星的,他们测量出母星发出的光频的细微变化,还观察到母星似乎前后摆动,最终确定这都是由于沿轨道运行的行星的牵引而引起的,由此推断,科学家们是通过研究母星外观的变化来确定行星的存在的,故选A。
转载请注明原文地址:https://kaotiyun.com/show/uYA7777K
0
大学英语四级
相关试题推荐
A、Becausesheplayedfootballbetterthanmostboys.B、Becauseshemadealotofmistakesthoughshedid-herbest.C、Becauseshe
A、Becauseitcanstrengthentheirbackmuscles.B、Becausetheyarenotcarryingtheirbodyweightontheirfeet.C、Becauseitin
Formanywomenchoosingwhethertoworkornottoworkoutsidetheirhomeisaluxury:theymustworktosurvive.Othersfacea
Moststudentsthinkofthelibraryonly【C1】______aplacewherebooksarestored,butalibraryalso【C2】______manyvaluables
FromGolda:theLifeofIsrael’sPrimeMinisterTheStrugglewithHerParentsoverHerEducationWhenGoldagraduatedas
Inbringingupchildren,everyparentwatcheseagerlythechild’sacquisition(习得)ofeachnewskill--thefirstspokenwords,th
A、Buyapresent.B、Buyanewdress.C、Preparesomefood.D、Gathersomemoney.B
Inrecentyears,moreandmoreforeignersareinvolvedintheteachingprogramsoftheUnitedStates.Bothoftheadvantagesand
A、Theanxietythatresultsfromlosingallthefamiliarsignsandsymbolsofsocialcommunication.B、Theanxietythatotherswil
随机试题
男,30岁,右下肢无力、左下半身麻木2个月。体检:左乳头平面以下痛、温觉减退,肌力正常。右下肢音叉振动觉、关节位置觉减退,肌力4级,腱反射亢进,引出Babinski征。
张某将邻居李某和李某的父亲打伤,李某以张某为被告向法院提起诉讼。在法院受理该案时,李某的父亲也向法院起诉,对张某提出索赔请求。法院受理了李某父亲的起诉,在征得当事人同意的情况下决定将上述两案并案审理。在本案中,李某的父亲居于什么诉讼地位?(2008—卷三—
下列有关仲裁协议的说法错误的是:()。
一般由城市()燃气管道构成大城市输配管网系统的外环网。
构筑物水池做满水试验时应掌握的要点有()、外观观察及蒸发量的测定。
()似设资产组合未来收益变化与过去足一致的,利用各组成资产收益率的历史数据计算现有组合收益率的可能分布,直接按照VaR的定义来计算风险价值。
对犯罪分子,要在宽大的前提下惩办。( )
设α1=(1,2,3,1)T,α2=(3,4,7,一1)T,α3=(2,6,a,6)T,α4=(0,1,3,a)T,则a=8是α1,α2,α3,α4线性相关的[].
高级程序设计语言中用于描述程序中的运算步骤、控制结构及数据传输的是(21)。
Thegeneralmanagerhaspromisedto______thematterinperson.
最新回复
(
0
)