首页
登录
职称英语
[originaltext] We are going to talk today about the moon, our moon. First of
[originaltext] We are going to talk today about the moon, our moon. First of
游客
2023-08-15
55
管理
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, so to 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(似是而非) 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.
Now listen to the following recording and answer questions 20 to 22.
20. What does the Prof. mainly discuss?
21. According to the Prof, why do scientists disagree with the theory that earth captured the moon?
22. What information about the moon’ s composition helps support the big splash theory?
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
细节题。根据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.可知,年轻的地球没有足够的引力去阻止月球穿过太阳系,把它拉进轨道。因此,正确答案为C。
转载请注明原文地址:https://tihaiku.com/zcyy/2926869.html
相关试题推荐
[originaltext]TodayI’dliketotalkaboutthesculptorHenryMoore,inpa
[originaltext]TodayI’dliketotalkaboutthesculptorHenryMoore,inpa
[originaltext]Let’sbegintodaybydiscussingenzymes.Enzymesarewhatma
[originaltext]Inthe18thcenturyFrencheconomistsprotestedtheexcessive
[originaltext]Inthe18thcenturyFrencheconomistsprotestedtheexcessive
[originaltext]TheEducationSelectCommitteehasbeenexaminingtheunderac
[originaltext]TheEducationSelectCommitteehasbeenexaminingtheunderac
[originaltext]TheeconomiccrisisinEuropeandNorthAmericaledtomoret
[originaltext]M:Goodmorning.Doctor.W:Goodmorning,Mr.White.WhatcanId
[originaltext]M:Goodmorning.Doctor.W:Goodmorning,Mr.White.WhatcanId
随机试题
Wheremostlikelyistheconversationtakingplace?[originaltext]M:Pardonme.
He______workingtillhewasseventyyearsold.A、keptupB、keptonC、kepttoD、ke
Onefeatureofnewfoundwealthinthedevelopingworldhasbeentheembrace
Thebesttitleofthispassagewouldbe______.[br]Whatcanheinferredfromt
在水利工程中人工划分为( )。A.工长 B.高级工 C.中级工 D.初级
患儿,女,8个月,频繁抽搐,高热4天,脑脊液检查:压力升高,外观微混,细胞数12
某社会工作服务机构的督导赵老师要求各个服务部每个月都要组织一次同事督导。执行了一
下列平原中,由侵蚀作用形成的是()。 A.东欧平原B.亚马孙平原 C.
抵押合同的内容需包括()。A:被担保的主债权种类、数额B:债务人履行债务的期限
老李拥有一套价值72万元的住房,老张拥有一套价值52万元的住房,双方互换住房
最新回复
(
0
)