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
According to the professor, what were, the beliefs of the Greek philosophers based upon?
According to the professor, what were, the beliefs of the Greek philosophers based upon?
admin
2010-03-19
71
问题
According to the professor, what were, the beliefs of the Greek philosophers based upon?
In ancient times, many people believed the earth was a flat disc. Well over 2,000 years ago, the ancient Greek philosophers were able to put forward two good arguments proving that it was not. Direct observation Of heavenly bodies was the basis of both these arguments. First, the Greeks knew that during eclipses of the moon, the earth was between the sun and the moon, and they saw that during these eclipses, the earth’s shadow on the moon was always round, they realized that this could be true only if the earth was spherical. If the earth were a flat disc, then its shadow during eclipses would not be a perfect circle, it would be stretched out into a long ellipse. The second argument was based on what the Greeks saw during their travels. They noticed that the North Star, or Polaris, appeared lower in the sky when they traveled south, in more northerly regions, the North Star appeared to them to be much higher in the sky. By the way, it was also from this difference in the apparent position of the North Star that the Greeks first calculated the approximate distance around the circumference of the earth, a figure recorded in ancient documents says 400,000 stadia, that’s the plural of the word stadium. Today, it’s not known exactly what length one stadium represents, but let’s say it was about 200 meters, the length of many athletic stadiums. This would make the Greek’s estimate about twice the figure accepted today, a very good estimate for those writing so long before even the fast telescope was invented.
选项
A、They noticed an apparent change in the position of the North Star.
B、They observed eclipses at different times of the year.
C、They were the first to estimate the distance between heavenly bodies.
D、They wanted to prove that the Earth was flat.
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/tT9K777K
0
专业英语四级
相关试题推荐
BythetimeyougettoNewYork,I______forLondon.
Hewascaught________intheexamination.
Manyaproblemhas_______becauseofpoorplanning.
Howoldareseniorcitizens?
Thatexperiencesinfluencesubsequentbehaviorisevidenceofanobviousbutneverthelessremarkableactivitycalledremembering
Accordingtothenews,theChinesespokesman______.
ThefamilyisthecenterofmosttraditionalAsians’lives.Manypeopleworryabouttheirfamilieswelfare,reputation,andhono
Thespeakerthinkthecausesofautomobileaccidentsare______
Theathleticprogramisexpectedtobringpublicitytotheschool,attractstudents,fosterstudentunity,andencouragealumni
Whydoesthemanwanttogiveherdaughterahistorybook?
随机试题
《秋兴八首》(其一)的悲秋含义。
A.石棉B.玻璃棉C.二氧化硅D.木粉E.水泥尘致石棉肺的物质是
28岁初产妇,妊娠40周,于晨4时临产,13时宫口开大4cm,21时30分宫口开大7cm,此时应诊断为( )29岁初产妇,妊娠39周,于晨4时临产,10时自然破膜,20时20分查宫口开大2指,此时应诊断为( )
湿疹糜烂型唇炎的表现与单独发生在唇部黏膜的斑纹表现难以鉴别的是
某部队供应班战士李某,平时纪律松弛,一次骑自行车带人被值勤人员发现将车扣留。李对此极为不满,想强行将自行车推走而与值勤人员争吵、扭打,其间吃点亏,便跑到伙房偷了一把菜刀藏在身上,回到营房门口再次想把自己的车推走,当值勤战士不同意推走时,便拿出菜刀乱砍,致值
简述可撤销民事法律行为的类型。[湘潭大学2015年研]
视频点播系统采用的多媒体通信服务质量类型是(16)_________。
What’sKategoodat?
•Youwillhearacollegelecturertalkingtoaclassofbusinessstudentsaboutprotectingcompanysecrets.•Asyoulisten
Thebusinessofadvertisingistoinventmethodsofaddressingmassiveaudiencesinalanguagedesignedtobeeasilyaccessible
最新回复
(
0
)