首页
登录
职称英语
What is the topic of the talk? [br] [originaltext] Welcome. It looks as if e
What is the topic of the talk? [br] [originaltext] Welcome. It looks as if e
游客
2023-11-11
16
管理
问题
What is the topic of the talk? [br]
Welcome. It looks as if everyone who’s coming is already here, so let’s start, shall we? In yesterday’s class, I talked about how the Earth and the Moon are thought to have formed. As I told you, the best theory concerning their origins seems to be the "Single Source" theory. This states that the Earth and the Moon were made out of the same ball of molten mass. I also talked about how the Earth eventually cooled down and how its surface features formed. And just before the end of the class, we looked at how all the continents were fused into one gigantic continent called Pangea. Now, to continue from where we left off, we know for certain that this massive continent did not last forever - just look at a present-day globe. According to current theories regarding continental drift, this huge landmass probably began to fracture into the continents we see today about 200 million years ago. This date is supported by the ages of basalt flows that have been found in the middle of the Atlantic Ocean. It is likely, by the way, that the Atlantic did not form immediately after Pangea’s breakup, but I’m getting way ahead of myself. Right now I want to show you a short video about Pangea. After that, I’ll talk about the oceans.
选项
A、200,000 years ago.
B、2,000,000 years ago.
C、20,000,000 years ago.
D、200,000,000 years ago.
答案
D
解析
细节题。题干问的是盘古大陆何时分裂。短文中“this huge landmass probably began to fracture into the continents we see today about 200 million years ago”表明在大约2亿年前盘古大陆开始分裂。
转载请注明原文地址:https://tihaiku.com/zcyy/3178885.html
相关试题推荐
WhichgameswillbemovedtoChinabyNBAin2004?[br][originaltext]All
Whatdoesthenewsitemmainlytalkabout?[br][originaltext]TheUSgovern
Whatdoesthenewsitemmainlytalkabout?[originaltext]TheUSgovernmentw
Accordingtothenews,NATOandRussia______.[originaltext]NATOandRussiaa
Accordingtothenews,Francewasstronglycriticizedfor______.[originaltext]
Whatisthetopicofthetalk?[br][originaltext]Welcome.Itlooksasife
Whatisthetopicofthetalk?[br][originaltext]Welcome.Itlooksasife
Whatisthetopicofthetalk?[originaltext]Welcome.Itlooksasifeveryon
WhatwasChinesepapermadefrom?[br][originaltext]Howmuchpaperdoyou
WhatwasChinesepapermadefrom?[originaltext]Howmuchpaperdoyouusee
随机试题
______(进入这座建筑物的惟一通道)isalongamuddytrack.Theonlymeansofaccesstothebuild
[originaltext]Somepeoplehaveverygoodmemories,andcaneasilylearnqui
德育的途径。
燃气管道气密性试验,压力应根据管道设计输气压力而定,当设计输气压力P<5kPa时
下列选项不属于作业许可证问题的是( )。A.作业许可证填写不认真,有些内容无法辨
下列不能用于种植的材料是A.钛及其合金 B.钴铬合金 C.生物陶瓷 D.银
湿邪为病时的脉象是()A.缓脉、虚脉 B.濡脉、弱脉 C.缓脉、细脉
阿胶在猪苓汤中的作用是A.补血止血 B.滋阴补血 C.滋阴润燥 D.
某公司经营4800种商品,其中A类有600种,B类有1500种,C类有2700种
根据生命周期理论,个人在稳定期的理财特征为()。 A.愿意承担一些高风
最新回复
(
0
)