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
32
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://jikaoti.com/ti/9OwFFFFM
0
大学英语四级
相关试题推荐
Schoolslookingtobancellphonesmayhaveanewexcuse:agrowingnumberofpeoplearedevelopinganallergytometalinthed
WestPointisacollegeforfutureArmyofficers.Ithasmorethan4000studentscalledcadets(军校学员).Theschoolis【B1】______
A、Bright.B、High-necked.C、Long-sleeved.D、Patternless.A四个选项都是表示衣服特征的词,问题有可能是询问哪个选项正确或错误,听音时要注意利用选项做笔记。[A]没有提到,故为答案。
A、Suggestatopicforaresearchpaper.B、Tellherwhattostudyforthehistorytest.C、Writeafavorableletterofrecommendat
A、StudentscansurftheInternetathome.B、Schoolscandevelopmoreclassesonline.C、Peoplecangetallkindsofinformationo
OpinionpollsrepeatedlytellusthattheonlythingAmericansworryaboutmorethantheenvironmentistheirhealth.Thisis【C1
A、Findpropertimeforexercise.B、Knowhowbeautycomes.C、Changethecourseconstantly.D、Nevergiveupforanyexcuse.D
A、Heisquitebusyforthewholeday.B、Hewillcomebackat10:30thenextmorning.C、Hecanmeetthemansometimenextmorning
Ifyouweretobeginanewjobtomorrow,youwouldbringwithyousomebasicstrengthsandweaknesses.Successorfailureinyou
TheresidentsofCalifornia’sSantaMonicaBayhavesomerathernoisyneighbors—andthey’renothappyaboutit.Thatistheconc
随机试题
如何认识近代中国半殖民地半封建社会的基本特征?
功能失调性子官出血是指
再生障碍性贫血属于
关于狂犬病病毒的叙述,不正确的是
可摘局部义齿解剖式人工牙的牙尖斜度大约是
某急腹症的患者,病情平稳,可采用如图所示哪种卧位
如果在一个CPU周期中要产生3个脉冲T1=200ns,T2=400ns,T3=200ns,试画出时序产生器逻辑图。
简评出声思维法的优缺点。
保险最基本的职能是()。
简述投放危险物质罪与污染环境罪的区别。
最新回复
(
0
)