首页
登录
职称英语
What is special about this class? [br] [originaltext] Good morning everyone.
What is special about this class? [br] [originaltext] Good morning everyone.
游客
2023-11-13
56
管理
问题
What is special about this class? [br]
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://tihaiku.com/zcyy/3184374.html
相关试题推荐
Whatdoestheman’sfatherwanthimtodo?[br][originaltext]W:Youdon’tlook
Whatdoestheman’sfatherwanthimtodo?[originaltext]W:Youdon’tlooktobe
Whatcanweknowaboutthemanfromtheconversation?[br][originaltext]W:Hey
WhowillbetheballgirlsattheMastersSeriesMadridevent?[originaltext]
Theaccidenthappenedin[br][originaltext]Maskedassailantswithgrenades
Theaccidenthappenedin[br][originaltext]Maskedassailantswithgrenades
ThecasualtiesfortherivalMuslimmilitiaswere[br][originaltext]Tanka
Whydopeopleleavehometotravelaccordingtothepassage?[br][originaltext
Whydopeopleleavehometotravelaccordingtothepassage?[originaltext]P
Beethovenestablishedhimselfasthegreatestcomposer[br][originaltext]B
随机试题
Thehotelalsohasaspecial-foodrestaurantattheeastofthecourtyardwhere
[originaltext]M:Now,Miss,doyoufeelallrightnow?Whathappened?W:Yes,I’
A.口含片B.溶液片C.舌下片D.包衣片E.分散片遇水能迅速崩解形成均匀的水分散
人类白细胞膜上有几类抗原A.1类B.2类C.3类D.4类E.5类
盾构近接施工中既有结构物防护措施之一是盾构施工措施,主要是( )。 A、隔断
外部经济不一定有利于资源配置。()
下列表述中,正确的有( )A.乡与镇一般为同级行政单元 B.集镇是乡的经济、
经济学上所推崇的“橄榄型”收入分配结构,是指低收入和高收入相对较少、中等收入占绝
关于干槽症的治疗,不正确的是A.给予抗感染、止痛治疗 B.彻底清创 C.隔离
账户结构划分为左方、右方两个方向,一方登记增加,另一方登记减少。至于哪一方登记增
最新回复
(
0
)