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、Planets with flowing waters. B、Planets near the stars. C、Planets with blue skies. D、Planets of different temperatures. A讲座中说,天
A、Planets with flowing waters. B、Planets near the stars. C、Planets with blue skies. D、Planets of different temperatures. A讲座中说,天
admin
2016-12-28
46
问题
Moderator:
Hello, ladies and gentlemen. It gives me great pleasure to introduce our keynote speaker for today’s session, Dr. Anomawa Shields. Dr. Aomawa Shields received her PhD in Astronomy and Astrobiology from the University of Washington in 2014.(19)Dr. Shields is the founder of Rising Stargirls, an organization dedicated to encouraging girls of all colors and backgrounds to explore and discover the universe. She uses her writing background to communicate science to the public in engaging, innovative ways.
Dr. Shields:
Thank you for that instruction. Today, I’m going to talk about how we’ll find life on other planets.
(20)On our planet, where there’s water, there’s life. So we look for planets that orbit at just the right distance from their stars. At this distance, shown in blue on this diagram for stars of different temperatures, planets could be warm enough for water to flow on their surfaces as lakes and oceans where life might reside. Some astronomers focus their time and energy on finding planets at these distances from their stars. What I do picks up where their job ends. I model the possible climates of exoplanets. And here’s why that’s important: there are many factors besides distance from its star that control whether a planet can support life.
(21)We don’t know what the atmospheres of these planets are like because the planets are so small and dim compared to their stars and so far away from us. For example, one of the closest planets that could support surface water is 23 light years away. So that’s more than 100 trillion miles. Trying to measure the atmospheric composition of an exoplanet passing in front of its host star is hard. So I use computer models to calculate the kind of atmosphere a planet would need to have a suitable climate for water and life.
Ice on a planet’s surface is also important for climate.(22)Ice absorbs longer, redder wavelengths of light, and reflects shorter, bluer light. That’s why the iceberg in this photo looks so blue. The redder light from the sun is absorbed on its way through the ice. Only the blue light makes it all the way to the bottom. Then it gets reflected back to up to our eyes and we see blue ice. My models show that planets orbiting cooler stars could actually be warmer than planets orbiting hotter stars.
My organization, Rising Stargirls, teaches astronomy to middle-school girls of color, using theater, writing and visual art. Science and art don’t often go together, but interweaving them can help these girls bring their whole selves to what they learn.
I hope more girls can join the Rising Stargirls. Thank you.
19. What is the aim of Dr. Shields Rising Stargirls?
20. What kind of planets do astronomers focus on?
21. What makes it difficult to measure the atmospheric composition of planets with surface water?
22. Why do icebergs look blue?
选项
A、Planets with flowing waters.
B、Planets near the stars.
C、Planets with blue skies.
D、Planets of different temperatures.
答案
A
解析
讲座中说,天文学家关注的是那些与恒星有着特定距离的行星,因为只有距离合适,行星表面的水才能呈现液态形式,以湖泊或海洋的形式存在,那里面才有生命存在的可能。
转载请注明原文地址:https://kaotiyun.com/show/zkF7777K
0
大学英语六级
相关试题推荐
端午节为每年农历五月初五。这是一个古老的传统节日,已有2000多年的历史。关于端午节的由来,说法很多。但最广为认可的一种说法是为纪念在这一天投江自尽的爱国诗人屈原。据说他死后,百姓异常悲伤。有人划着船寻找他的尸身,有人将米饭、鸡蛋等食物丢进江里喂鱼和虾,以
Angeroftenmakesusuncomfortable.It’suncomfortabletowitnessanduncomfortabletofeel.Witnessingyourchild’sangercanb
Angeroftenmakesusuncomfortable.It’suncomfortabletowitnessanduncomfortabletofeel.Witnessingyourchild’sangercanb
A、Thequalityofneighborhoodlife.B、Theintensityoftheworkschedule.C、Thefrequencyofmeetingfriends.D、Thetimespenti
A、Tocomplainaboutthewebservice.B、Toaskfortheaccountinformation.C、Topaythewomanhisrent.D、Tonotifythewomanhi
A、Videogamesmayleadtoaddiction.B、E-sportsdon’thavealargeaudience.C、Theinfluenceofe-sportsisnotbigenough.D、Th
A、Themouthisrelatedtoone’selegance.B、Theeyeshavesomethingtodowithone’scharm.C、Thenosecantelluswhetheraper
A、Englishculture.B、Americanculture.C、Chineseculture.D、Allcultures.D事实细节题。本题问的是音乐、动作和情感的三方关系存在于哪种文化中。短文中间部分提到音乐、动作、情感之间的三
A、Genesaffectingsenseofhearing.B、Genesrelatedtosenseofsmell.C、Genesaboutsenseoftouching.D、Genesconcerningsense
A、Subjective.B、Objective.C、Ambiguous.D、Changeable.B观点态度题。本题问的是Lehrer先生对于电子阅读器持什么样的观点。短文最后,Lehrer先生表示,电子阅读器彻底革新了我们的阅读习惯,它带来方便
随机试题
CVP的测定有助于鉴别心功能不全或血容量不足引起的休克。
前列腺癌很少直接侵犯的部位是
颞骨岩部病变,常采用的CT扫描方式是
上下颌牙齿对位接触情况不包括( )
甲公司为增值税一般纳税人,2018年发生有关业务如下:(1)10月8日,甲公司自行建造厂房,购入工程物资,取得增值税专用发票上注明的销售价格为98万元,增值税税额为15.68万元;另支付安装费2万元,增值税税额为0.2万元,全部款项以银行存款支付;领用生
被誉为“两弹元勋”的科学家是()。
下列情形中,可以认定为自首的有()。
阅读材料,回答问题共建“一带一路”倡议,目的是聚焦互联互通,深化务实合作,携手应对人类面临的各种风险挑战,实现互利共赢、共同发展。在各方共同努力下,“六廊六路多国多港”的互联互通架构基本形成,一大批合作项目落地生根,首届高峰论坛的各项成果顺利落实,150
设有如下程序:PrivateSubForm_Click()Dam=InputBox(”请输入一个实数”):P=InStr(num,".")Ifp>0ThenPrintMid(num,P+1
设变量均已正确定义,若要通过scanf(’’%d%c%d%c’’,&a1,&c1,&a2,&c2);语句为变量a1和a2赋数值10和20,为变量c1和c2赋字符X和Y。下列所示的输入形式中正确的是(注:口代表空格字符)()。
最新回复
(
0
)