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
What is special about this class?
What is special about this class?
admin
2013-04-27
58
问题
What is special about this class?
Good morning everyone. My name is Professor Michael Andrews. On behalf of myself and my colleagues, I would like to welcome you to Extrasolar Planetology, which is a new class being offered by the Astronomy Department this year.
About twenty-five years ago, there was no solid proof that other planets existed beyond our solar system. Most astronomers at that time felt that planets had to be out there, but they could not see them or prove they were there. Why? Simply put, planets are small and space is vast. Imagine trying to see a pea with a telescope from a hundred miles away, and you’ll understand how hard it is to find planets that are light years distant.
Clearly, something changed, for we now have a class called Extrasolar Planetology. What changed? Well, mainly, instruments got better and sophisticated telescopes were put into space. As a result, astronomers began to find the proof that they had lacked before.
The very first good evidence for the existence of other planets came from observations of ’wobbling’ stars. Using their high-tech instruments and space-based telescopes, astronomers found that some stars wobbled as they moved through space. What could be causing this the astronomers wondered? And then Eureka! The only likely explanation seemed to be that these stars were being affected by the gravity of unseen orbiting companions. In other words-planets!
And now, if you would please turn off the lights, I would like to show you some slides of a few of these wobbling stars.
选项
A、Proof.
B、Gravity.
C、Colleagues.
D、Instruments.
答案
B
解析
细节题。是什么在影响恒星。根据讲座内容,是来自行星的引力,从“The only likely explanation seemed to be that these stars were being affected by the gravity of unseen orbiting companions.In other words-planets!”可知。根据常理也可推断出其他选项都是不合理的。
转载请注明原文地址:https://kaotiyun.com/show/fhQK777K
0
专业英语四级
相关试题推荐
Weallscreamforwater【C1】______thirsty.Butdoyouknowinveryhot,dryweather,plantsalsomakefaintsounds—【C2】______the
Weallscreamforwater【C1】______thirsty.Butdoyouknowinveryhot,dryweather,plantsalsomakefaintsounds—【C2】______the
Isthereapopulationproblem?Myanswer【C1】______thequestionis"YES",thereisaproblem.Thescaleofhumanactivitiesisno
Isthereapopulationproblem?Myanswer【C1】______thequestionis"YES",thereisaproblem.Thescaleofhumanactivitiesisno
Thefirstwaywecanapproachlanguageisasaphenomenonoftheindividualperson.Itisconcerned【C1】______describingandexpl
Themanismakingthecallbecausethecellphone
"It’sfivemiles;andasyou’reevidentlybentontalkingyoumightaswelltalktosomepurposebytellingmewhatyouknowabo
Theyovercameallthedifficultiesandcompletedtheprojecttwomonthsaheadoftime,______issomethingwehadnotexpected.
What’syourearliestchildhoodmemory?Canyourememberlearningtowalk?Ortalk?Thefirsttimeyou【C1】______thunderor
EightforeignaidworkerswerearrestedinAfghanistanbecauseoftheir_________activities.
随机试题
计量技术机构采取预防措施的目的是________。
A.溃疡的长轴与肠腔长轴平行B.溃疡呈环形与肠腔长轴垂直C.溃疡呈烧瓶状口小底大D.溃疡呈地图状肠伤寒的特点是
肝肾不足所致之胎动不安,应首选()
A.二至丸B.左归丸C.虎潜丸D.六味地黄丸E.大补阴丸治疗肾阴虚型虚劳首选方剂
A.里急后重B.排便不爽C.滑泻失禁D.肛门失约E.肛门气坠
在工程建设的( )阶段,需要确定工程项目的质量要求,并与投资目标相协调。
文件评审的主要目的不包括()。
下列词语中加下划线字的读音全都相同的一组是()
最近全市的一项调查显示,同意选择收看“新闻类电视节目”的市民中进行肯定回答的居民比5年前调查时多出了15个百分点。过去5年间,阅读新闻类报纸的人数也增加了差不多的百分点。播放“新闻类电视节目”公共电视台多由公司赞助,由于目前这种赞助可能要大幅度削减,我们可
ThomasMalthuspublishedhisEssayonthePrincipleofPopulationalmost200yearsago.Eversincethen,forecastershavebeing
最新回复
(
0
)