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
A、Earth and the Moon traveled at different Speeds B、The Moon formed billions of years before Earth C、Earth did not have enough g
A、Earth and the Moon traveled at different Speeds B、The Moon formed billions of years before Earth C、Earth did not have enough g
admin
2005-01-30
49
问题
We are going to talk today about the moon, our moon. First of all, the earth’s moon is unusual. Why? It’s larger than other moons or satellites in the solar system, in relation to its planet that is. Its diameter is more than a quarter that of the earth. And if you compare the earth and the moon in terms of substance, you find the moon isn’t much like the earth. For example, the earth has a significant iron core, but the moon contains very little heavy materials like iron. That’s why its density is much lower than that of the earth. Now, one time it was believed that the moon and the earth were formed at the same time from the same material. But then wouldn’t the moon have as much iron as the earth? Another theory is that the moon was formed elsewhere in the solar system, and then it was captured, sort of speak, by earth. But study shows that the young earth would not have had enough gravitational force to stop a body the size of a moon from traveling through the solar system and pull it into orbit. The newest theory is called the big splash theory. Here, the new young earth was hit by another big planet. Most of the colliding planet entered the earth and became part of it. But the huge impact created a vapor that shed out into space and eventually condensed as the moon. Because this material came mostly from the earth surface crust, not the iron core, the moon contains almost no iron. Well, as plausible as it sounds, it’s only a theory, and we can’t be sure that this is what really happened, that this is how the moon originated. Plenty of research remained to be done.
选项
A、Earth and the Moon traveled at different Speeds
B、The Moon formed billions of years before Earth
C、Earth did not have enough gravitational pull
D、Earth and the Moon were too far from each other
答案
C
解析
According?to?the?Prof,?why?do?scientists?disagree?with?the?theory?that?earth?captured?the?moon?
转载请注明原文地址:https://kaotiyun.com/show/mByO777K
0
托福(TOEFL)
相关试题推荐
Completethesummaryusingthelistofwords/phrases,A-H,below.ControversyaboutclimatescienceThereve
WilliamGilbertandMagnetismA16thand17thcenturiessawtwogreatpioneersofmodernscience:GalileoandGilbert.Theimpac
ClassifythefollowingcharacteristicsasrelatingtoASocialScienceBMedicalScienceCBothSocialScienceandMedicalScien
Choosethecorrectletter,A,B,CorD.Writethecorrectletterinboxesonyouranswersheet.Whatistheauthor’sopiniono
Completethenotesbelow.UseNOMORETHANTHREEWORDSORANUMBERforeachanswer.INTERNATIONALDRIVINGLICENSESFACTS
WriteONEWORDONLYforeachanswer.NameTWOelementswhichproduceweather:(31)(32)
Gavin’sapartmentislocatedonthe______.
Whenwerethefollowingfeaturesincludedinanautoshow?Writethecorrectletter,A,B,orCnexttoquestions17-20.Alast
insurance本题有关这款DVD的售价。录音原文中的thatincludes是题目中including的同义替换。
Whichofthefollowingquestionsdoesthepassageprimarilyanswer?Theword"unique"inline1isclosestinmeaningto
随机试题
核桃仁是五仁馅原料之一,一般不需要烤熟即可加工制馅。()
You()mebecauseIdidn’tsaythat.
自动生化分析仪性能评价指标主要有哪些?
标准正态分布的均数与标准差分别为
乳酸循环所需的NADH主要来自
真热假寒的治疗方法为
ABC公司是一家上市公司,该公司2015年年末资产总计为10000万元,其中负债合计为2000万元。该公司适用的所得税税率为25%。相关资料如下:资料一:预计ABC公司净利润持续增长,股利也随之相应增长。相关资料如下表所示:资料二:ABC公司认为2
在甲市居住的丁某每月取得出租居民住房租金收入8000元,租期一年,当期未发生修缮费用,则丁某当年应缴纳的个人所得税是()。
简述近代俄国的民粹主义。(北京大学2006年世界通史真题)
Oneofthemostimportantfeaturesthatdistinguishreadingfromlisteningisthenatureoftheaudience.【C1】______thewriterof
最新回复
(
0
)