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、By greatly increasing the ocean’s depth in some areas. B、By creating large waves on the surface of the ocean. C、By causing mud
A、By greatly increasing the ocean’s depth in some areas. B、By creating large waves on the surface of the ocean. C、By causing mud
admin
2004-11-30
89
问题
They are discussing a reading assignment about the ocean floor.
A: Dr. Smith. I need to ask you about something in Chapter 12. Well it talks about erosion and the deposit of sediment on the deep sea floor, but I’m confused, cause, well, for that to happen there would have to be some kind of force down there moving the mud or sand or whatever, right. But I thought there weren’t any waves or currents that deep in the ocean.
B: That’s not exactly correct. It’s true that deep down on the ocean floor we won’t have the same kinds of currents we find in shallower parts. But we do find what we call turbidity currents. This wasnt in the book but the term came up in class. Do you remember what itmeans?
A: Umh, turbidity currents? Oh, yeah! Isn’t that when sediment like sand or mud gets stirred up and mixes with water And then this mixer kind of flows through the water around it, right?
B: Good!
A: Umh, but I thought that only happened in rivers.
B: Well, yes. This does occur in rivers, but we see turbidity currents deep in the ocean as well.
A: But how do they get started there?
B: Earthquakes mostly, when an earthquake occurs under water, it throws up tremendous amounts of mud or sand that becomes suspended in a layer of water near the bottom of the ocean. This layer is so much denser and heavier than other ocean water that if flows right down the slopes o f the ocean floor and gains more and more speed as it moves along. Then it’s just like the winds blowing across the desert picking up sand from one place and moving it along and finally dropping it somewhere else.
选项
A、By greatly increasing the ocean’s depth in some areas.
B、By creating large waves on the surface of the ocean.
C、By causing mud or sand to mix with ocean water
D、By crushing large amounts of stone.
答案
C
解析
According to the professor, how do earthquakes cause turbidity currents?
转载请注明原文地址:https://kaotiyun.com/show/l48O777K
0
托福(TOEFL)
相关试题推荐
Lookatthenoticebelow.UsingNOMORETHANTHREEWORDSAND/ORANUMBERanswerthefollowingquestions.Writeyouranswersinb
ThepassageonthefollowingpageshassevensectionsA-G.Choosethecorrectheadingforeachsectionfromthelistofheadings
ReadthetextbelowandanswerQuestions8-14.*Onlyonediscountmayapplytoeachfare.CHANGESANDREFUNDSTicketsmaybere
TheInnovationofGroceryStoresA.Attheverybeginningofthe20thcentury,theAmericangrocerystoresofferedcomprehen
Davidsaysthathethinksagapyearisunsuitablefor______.Researchshowsemployersappreciateyoungpeoplewhohavelived
Davidsaysthathethinksagapyearisunsuitablefor______.Davidsaysthatgapyearscost£15000to£20000becausethatis
A、She’sgladthemanwaitedforher.B、She’dliketoreschedulethemeeting.C、Shewasn’tverylateforthemeeting.D、She’ssor
Doyouagreeordisagreewiththefollowingstatement?Thereisnothingthatyoungpeoplecanteacholderpeople.Usespecificr
Ourperceptionthatsocialsupportisavailableisrelatedtoourattachmenttootherpeople.Themoresecuretheattachment,th
随机试题
Thefansbesiegedthefootballplayertogethis________.
A.圆孔、卵圆孔B.视神经管C.颈内动脉管和半月节D.垂体、蝶鞍、蝶窦E.颞叶海绵窦后部相邻
头两侧疼痛属
在工程网络计划中,关键线路是指()的线路。
基准收益率是( )。
下列账簿中,不采用三栏式账页格式的是()。
当出现高通货膨胀下GDP增长时,则()。
就一般市场情况而言,接受正规学校教育年数越多的人,接受在职培训的可能性就会()。
股份公司发行股票的唯一原因是为了扩大经营规模。()
根据保险法律制度的规定,人寿保险的被保险人或者受益人自其知道或应当知道保险事故发生之日起计算,向保险人请求给付保险金的诉讼时效期间为()年。(2017年)
最新回复
(
0
)