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 Moo
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 Moo
admin
2018-02-13
55
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、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
细节题。根据the moon contains almost no iron和相关信息可知本题正确答案是D。
转载请注明原文地址:https://kaotiyun.com/show/ohT7777K
0
大学英语六级
相关试题推荐
IsitanywonderthatAmericaisalsoacountryofdangerouslyoverweightpeople?AccordingtoarecentstudybytheNationa
Atattoomaygiveparentsofchildrenwithfoodallergiessomepeaceofmindwhentheysendtheirkidsofftoschool.Yes,atat
上海是海外游客来中国旅游的必到之地。在这个商业中心,游客们可以欣赏到千姿百态的建筑群,雄伟壮丽的外滩(theBund),灯火辉煌的商店和极富魅力的博物馆。上海白天喧嚣繁忙(bustle),到了晚上,人们在夜生活场所尽情享受。作为一座国际大都市(metro
传统的中国绘画是一门独特的美术(fineart),无论是风格还是技巧都与世界其他艺术门类迥然不同。中国人绘画采用毛笔(brush)蘸墨汁或颜料,灵巧地挥洒(wield)于纸上。画家用深、浅、浓、淡的点(dot)和线构成一幅图画。在优秀画家的手里,毛笔和墨
A、Becauseofthedevelopmentofindustry.B、Becauseofthepasteurizationprocess.C、Becauseofthenewdiscoveries.D、Becauseo
A、Afitnessprogramofferedtothegeneralpublic.B、Aphysicalexercisetobuildupmuscles.C、Aprogramthatmakespeoplekeep
A、Quietandconfident.B、Boldandloud.C、Shyandenergetic.D、Trickyandtimid.B选项均为描述人的个性特征的形容词词组,问题可能与某人的性格特点有关。题目问我们对外向的人有什
A、Paidmuchattentiontotheresultsofscientificdiscoveries.B、Seldomintroducedsafetylawsbeforedisastersoccurred.C、Har
A、Tomaketheworldabetterplace.B、Towinthepresidency.C、Tobeaneducatedperson.D、Toupsetmorecelebratedrivals.A录音中
A、Changingtheobstaclesintoopportunities.B、Findinghopethroughparents.C、Spottingeveryopportunity.D、Overcomingallthe
随机试题
信息系统开发必须坚持_______性和实用性相结合的原则。
决定资产评估业务应实行行业自律管理的是()
无效合同的确认权属于( )。
下列关于消费税纳税地点的表述中,正确的是()。
以下有关明细分类科目的表述中,正确的有()。
双绞线由两根互相绝缘绞合成螺纹状的导线组成。下面关于双绞线的叙述中,正确的有()。
鉴别下列各组物质,所用两组试剂均正确的是()。
10,12,18,36,90,( )
Inthecorneroftheroom______.
Hedoesnotknow______todealwiththematterandisveryworried.
最新回复
(
0
)