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、The Moon has no water B、The Moon’s materials came from Earth’s core C、The Moon’s core differs from its surface D、The Moon cont
A、The Moon has no water B、The Moon’s materials came from Earth’s core C、The Moon’s core differs from its surface D、The Moon cont
admin
2005-01-30
53
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、The Moon has no water
B、The Moon’s materials came from Earth’s core
C、The Moon’s core differs from its surface
D、The Moon contains little iron
答案
D
解析
What?information?about?the?moon’s?composition?helps?support?the?big?splash?theory?
转载请注明原文地址:https://kaotiyun.com/show/1ByO777K
0
托福(TOEFL)
相关试题推荐
Lookatthefollowingtheories(Questions4-7)andthelistofpeoplebelow.Matcheachtheorywiththepersonitiscreditedto.
Questions19-23Lookatthefollowingcharacteristics(Questions19-23)andthelistofperiodsbelow.Matcheachcharacteristicw
Answerthequestionsbelow.ChooseNOMORETHANTHREEWORDSORANUMBERfromthepassageforeachanswer.WhendidtheBrashco
Music:LanguageWeAllSpeakSectionAMusicisoneofthehumanspecie’srelativelyfewuniversalabilities.Withoutformaltra
Youshouldspendabout20minutesonQuestions27-40whicharebasedonReadingPassage3below.SunsetfortheOilBusiness?Th
WhichthreeforeignlanguagesaretraditionallytaughtintheUSA?Theyare(He/Sheis)learningChinesetohelpwiththeirfut
Amina’sprojectisaboutalocal______Aminawassurprisedbecauseshe______
Theuniversityhasproduceda______toinformstudentsaboutthedifferentaccommodationoptionsavailable.GrampianHalls
CompletethesummaryofInternationalDrivingLicensesbelow.UseNOMORETHANTHREEWORDSforeachanswerInternational
Choosethecorrectletter,A,BorC.PlanningapresentationonnanotechnologyRussandhistutoragreethathisapproachint
随机试题
有权就世界贸易组织所管辖的一切问题决定的机构是
下列哪种抑制作用属竞争性抑制作用
用结构式或反应式表示名词术语或反应:Fries重排
大面积烧伤病人第1个8小时,晶、胶体输入量为(不包括基础需水量)
A.药品不良反应B.上市药品C.可疑不良反应D.新的药品不良反应E.严重不良反应指怀疑而未确定的不良反应。
背景资料:某年某月19日傍晚,某拖轮按照调度计划,拟将停在码头龙门档内已装妥混凝土桩一驳船拖至起重船外档。当时,龙门档口违章停有五艘民船,拖轮多次用高音喇叭要求他们离开,均未果。那天,拖轮船员到岗不足,派出一人既要带缆又要嘹望。当班船舶驾驶员操作不慎,被拖
根据《建筑地基处理技术规范》JGJ79—2012、《建筑地基基础设计规范》GB50007—2011,对于建造在处理后地基上的建筑物,下列哪些说法是正确的?
资产管理计划应当具有明确、合法的投资方向,具备清晰的风险收益特征,并区分最终投向资产类别,下列规定确定资产管理计划所属类别的说法中错误的是()。
()是人员招聘的前提条件之一。(2003年8月三级真题)
某企业的预期年收益额为16万元,该企业的各单项资产的重估价值之和为60万元,企业所在行业的平均收益率为20%,以此作为适用本金化率计算出的商誉的价值为()。
最新回复
(
0
)