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、It’s cleaner. B、it’s heavier. C、it’s warmer. D、It moves more slowly. BHow is a turbidity current different from the water arou
A、It’s cleaner. B、it’s heavier. C、it’s warmer. D、It moves more slowly. BHow is a turbidity current different from the water arou
admin
2004-11-30
74
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、It’s cleaner.
B、it’s heavier.
C、it’s warmer.
D、It moves more slowly.
答案
B
解析
How is a turbidity current different from the water around it?
转载请注明原文地址:https://kaotiyun.com/show/e48O777K
0
托福(TOEFL)
相关试题推荐
Youshouldspendabout20minutesonQuestions15-26whicharebasedonReadingPassage2below.Anexaminationofthefunction
ReadthetextbelowandanswerQuestions8-14.*Onlyonediscountmayapplytoeachfare.CHANGESANDREFUNDSTicketsmaybere
Completethesummarybelow.ChooseNOMORETHANTWOWORDSfromthepassageforeachanswer.HowchildrenlearnPiagetproposedt
AccidentalScientistsAAparadoxliesclosetotheheartofscientificdiscovery.Ifyouknowjustwhatyouarelookingfor,fi
Choosethecorrectletter,A,B,CorD.Writethecorrectletterinboxes22-26onyouranswersheet.Thedecreaseinthenumb
Theuniversityhasproduceda______toinformstudentsaboutthedifferentaccommodationoptionsavailable.BreconHalls
SeverallargeearthquakesweretriggeredbytheeruptionofPinatuboon15thJune1991becauseofthe(36)ofthesummit.The
A、Shemightknowsomeonewhoneedsacar.B、Shedoesn’tknowmanypeople.C、Mostofherfriendsdon’tdrive.D、She’lltrytobor
A、Formanewcommittee.B、Joinhercommittee.C、Findoutwhentheconferencewillbeheld.D、Scheduleacommitteemeeting.DA:t
A、Shehasn’tfinishedherpaper.B、Shehaslostherparkingsticker.C、She’sparkedillegally.D、Sheputtoolittlemoneyinthe
随机试题
“长城386微机”中的“386"指的是()。
一个人离我们越远,其在视网膜上的影像就越小,可是我们认为他的身高没变。这符合知觉的()。
锯削时的锯削速度以每分钟往复( )为宜。
患者,男性,20岁,饮用不洁河水后一天突发剧烈腹痛,继而呕吐,吐泻物呈“米泔水”样,无腹痛,查体:T36.8℃,BP95/70mmHg,腹部无痛,心肺无异常。该病菌的致病机制为
建筑基坑支护采用排桩+锚杆支护,锚杆抗拔试验应在锚固段注浆固结体强度达到15MPa或达到设计强度的()后进行。
公开募集基金的基金管理人员不得从事的活动不包括()。
下列表述中,符合《税收征收管理法》规定的有()。
根据下面的文字资料回答131~135题。红星制鞋厂在1998年对某市六种鞋类的消费量调查中发现,农民人均鞋类年消费量除旧式棉鞋高于城镇居民、布鞋与城镇居民持平外,其他鞋类消费量均低于城镇居民。例如,农民每百人年均消费皮鞋17.6双,比城镇居民低83
A______firmwillhelpusfindsoftware.
Shewillhavetofindsomewhereelsetowork,forshecan’t______thisloudnoiseanylonger.
最新回复
(
0
)