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、What a turbidity current is. B、The causes of underwater earthquakes. C、How winds can affect some ocean currents. D、Why the boo
A、What a turbidity current is. B、The causes of underwater earthquakes. C、How winds can affect some ocean currents. D、Why the boo
admin
2013-01-20
85
问题
W: Dr. Smith. I need to ask you about something in Chapter 12. Well, it talks about erosion and the deposit of sediment(solid matter that settles at the bottom of a liquid)on the deep sea floor, but I’m confused. 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.
M: 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. That wasn’t in the book but the term came up in class. Do you remember what it means?
W: Um, turbidity currents? Oh, yeah! Isn’t that when sediment like sand or mud gets stirred up and mixes with water? And then this mixture flows through the water around it, right?
M: Good!
W: Uh, but I thought that only happened in rivers.
M: Well, yes. This does occur in rivers, but we see turbidity currents deep in the ocean as well.
W: But how do they get started there?
M: 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 it flows right down the slopes of 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.
Questions 19 to 22 are based on the conversation you have just heard.
19. What is the main topic of the discussion?
20. What does the professor ask the student to explain?
21. According to the professor, how do earthquakes cause turbidity currents?
22. Why does the professor mention desert winds?
选项
A、What a turbidity current is.
B、The causes of underwater earthquakes.
C、How winds can affect some ocean currents.
D、Why the book talks about turbidity currents.
答案
A
解析
男士解释海底沉淀物运动时提到了turbidity currents,并说这个术语曾经?在课堂上提过,然后男士问Do you remember what it means? 由此可见,教授希望学生能解释turbidity current,故答案为[A]。
转载请注明原文地址:https://kaotiyun.com/show/vhu7777K
0
大学英语四级
相关试题推荐
ShouldPeopleKeepBizarrePets?1.现在越来越多的人饲养另类宠物2.人们对这一现象有不同看法3.你的看法
A、Enoughfoodforaweek.B、Asleepingbagandaraincoat.C、Hikingbootsandbathingsuit.D、Acampingtent.C对话中女士建议男士跟她和朋友一块去
A、Consultingfertilizerknowledgethroughacall.B、Inquiringweatherinformationonline.C、Helpingfarmerschoosegoodseeds.D
A、Somethingsmall.B、Somethingsweet.C、Somethingtypicalinyourcountry.D、Somethingvaluableinyourcountry.C细节辨认题。女士说自己初到美
MexicoPutsItsChildrenonaDietMexicoputsitsschoolchildrenonadietatthebeginningoftheyear.Butasoftenhappe
______(由于航空公司间激烈的竞争),travelexpenseshavebeenreducedconsiderably.
Americansareproudoftheirvarietyandindividuality,yettheyloveandrespectfewthingsmorethanauniform,whetheritis
OpinionpollsrepeatedlytellusthattheonlythingAmericansworryaboutmorethantheenvironmentistheirhealth.Thisis【C1
A、HeprefersGermanytootherEuropeancountries.B、Hepreferslargenoteswhentraveling.C、He’drathertaketraveler’schecks
A、Findoutacourse.B、Dropoffapaper.C、Gotoameeting.D、Seeanadviser.A选项中的Findout,Go,See等表明,本题可能考查行为动作。对话中男士说Oh,Ialmo
随机试题
患者,女,68岁,因哮喘急性发作就医。医师处方:雾化吸入沙丁胺醇、异丙托溴铵、布地奈德混悬液,同时静脉注射氨茶碱、氢化可的松琥珀酸钠。患者用药后3h出现骨骼肌震颤。实验室检查:血钾2.7mmol/L(正常参考范围3.5~5.5mmol/L)。引起患者不良反
三部门经济中,总需求的表达式为()
A、3个B、5个C、6个D、1个E、50个镜下血尿是指显微镜下每高倍视野红细胞计数超过
如果当前的证券价格反映了历史价格信息和所有公开的价格信息,则该市场属于()。
以一笔款项购入多项没有单独标价的固定资产,应当按照各项固定资产的账面价值比例对总成本进行分配,分别确定各项固定资产的成本。()
下列关于专门决策预算的表述中,不正确的是()。
“闪婚”是指男女双方恋爱不到半年就结婚。某研究机构对某市法院审理的所有离婚案件作了调查。结果显示,闪婚夫妻3年内起诉离婚的比例远远高于非闪婚夫妻。由些,该研究机构认为闪婚是目前夫妻离婚的一个重要原因。下列哪项如果为真,最能削弱以上论证?
下列说法中,正确的有()。Ⅰ.清除内存、设置时钟都是特权指令,只能在内核态(系统态、管态)下执行Ⅱ.用零作除数将产生中断Ⅲ.用户态到内核态的转换是由硬件完成的Ⅳ.在中断发生后,进入中断处理的程序可能是操作系统程序,也可能是应用程序
BestChoiceRecruitmentAgencyVacancyRegistrationFormCOMPANYNAME:HopeVACANCYTITLE:【A1】______
A、Jefferson’sviewsaboutcommercializedagriculture.B、Internationaltradeinthenineteenthcentury.C、Improvementsinfarmma
最新回复
(
0
)