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、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://kaotiyun.com/show/3T9K777K
0
专业英语四级
相关试题推荐
Allflights______becauseoftheterribleweather,theyhadtogotherebytrain.
ItiscommonlybelievedintheUnitedStatesthatschooliswherepeoplegotogetaneducation.Nevertheless,ithasbeensaid
Itisuptothegovernmentto______therightsofindividualcitizens.
Thespeakerthinkthecausesofautomobileaccidentsare______
Thespeakerthinkthecausesofautomobileaccidentsare______
TheUnitedStatesiswell-knownforitsnetworkofmajorhighwaysdesignedtohelpadrivergetfromoneplacetoanotherinthe
Whendidtheunemploymentratebegintoincrease?
WhatdoesthewomanhavetodoonSaturdaymorning?
______wehavefinishedtheCourse,weshallstartdoingmorerevisionwork.
随机试题
A.孙络B.别络C.经别D.经筋加强了十二经脉中相为表里的两条经脉在体内的联系的是
A.藿香正气散B.不换金正气散C.葛根芩连汤D.白头翁汤E.芍药汤患者泄泻腹痛,泻下急迫,粪色黄褐,气味臭秽,肛门灼热,烦热口渴,舌质红,苔黄腻,脉滑数。治疗应首选
在交通困难地区,500kV导线与地面距离,在最大计算弧垂情况下不应小于()。
证券公司从事资产管理业务的,资产管理业务人员应当符合的条件不包括()。Ⅰ.业务人员具有证券从业资格Ⅱ.业务人员具有硕士以上的学位Ⅲ.业务人员具有3年以上证券自营、资产管理或证券投资基金管理从业经历的人员不少于5人Ⅳ.业务人员具有证券投资咨询
1978年出土的战国曾侯乙编钟属于()。
2008年1月1日新《劳动合同法》正式施行,但是很多企业主都把新《劳动合同法》解读为保护劳动者权利和合法利益的法律,而没有保护他们的权益甚至侵犯他们的权益,这些人错在忽视了()。
历史证明,每一轮经济危机都伴随着一场深刻的技术革命,然后逐渐走出低谷并开始复苏。不得不承认,金融危机让“中国制造”遭遇空前危机,这造成的直接结果是各地区都在抓产业升级。但同时新的问题出现了,在“抓大放小”的惯性思维下,不少人认为,产业升级是大企业的事,与中
丝绸,是中国献给世界的礼物,也是震泽人民传承至今的文化符号和生活方式。这个以丝绸____________________的江南古镇,因水兴市,缘丝聚商。蚕桑民俗体验、太湖美食展销、名家书画展出等系列活动精彩演绎了如今震泽丝绸文化的传承,令人________
心理健康
Tothegreatdisappointmentofthepublic,thewantedinthemurdercasesofarremains
最新回复
(
0
)