首页
登录
职称英语
According to the professor, what were, the beliefs of the Greek philosophers bas
According to the professor, what were, the beliefs of the Greek philosophers bas
游客
2023-11-21
35
管理
问题
According to the professor, what were, the beliefs of the Greek philosophers based upon? [br]
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、A place for making astronomical observations.
B、An instrument used for observing stars.
C、A unit of measurement.
D、The North Star.
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3205707.html
相关试题推荐
PassageThree[br]AccordingtoPara.5,whatareKoolhaasgloatingover?Peo
PassageThree[br]Accordingtothecontext,whatdoes"doesthejob"meani
PassageTwo(1)Ifallhadgoneaccordingtoplan,theJamesWebbSpace
PassageTwo(1)Ifallhadgoneaccordingtoplan,theJamesWebbSpace
PassageTwo[br]HowtodescribeChaplin’sperformingstyleaccordingtoPar
PassageOne[br]Accordingtothepassage,whatwordscanbeusedtodepict
PassageOne[br]Explainthemeaningof"liveuptotheirhype"accordingto
PassageFour[br]AccordingtoFrancesO’Grady,whatshouldahealthymodern
PassageFour[br]Whyisthegenderpaygapnarrowingdownaccordingtoecon
PassageFour[br]WhatdidpeopledoatMartinmasaccordingtothepassage?P
随机试题
Undernocircumstances______leavehispost.A、asoldiermustn’tB、asolidermus
AlmosteverydaythemediadiscoversanAfricanAmericancommunityfighting
Friendshipisbothasourceof【11】andgoodhealth.Peoplewhohaveclosefri
Thepolicemanneedstosee______yourIDcardoryourdriver’slicense(执照).A
钢板用两个铆钉固定在支座上,铆钉直径为d在图示载荷作用于,铆钉的最大切应力是:
侵犯商标专用权的行为不包括()A.侵犯商标罪的犯罪客体 B.侵犯商标罪的
根据基金投资对象的不同,可以将投资基金分为( )与( )。A.股票投资基金,
下列关于补益药对物质代谢的影响,错误的是A.促进核酸合成B.降血脂C.降血糖D.
常山涌吐宜()。A.生品外用B.生品内服C.酒制外用D.酒制内服E.研末外用
某机电产品国际招标过程中,决定于2010年10月30日开标。如果投标人甲认为已公
最新回复
(
0
)