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
What does the professor mean by this statement:
What does the professor mean by this statement:
admin
2019-07-01
58
问题
What does the professor mean by this statement:
Questions 1 through 4. Listen to part of a discussion in an oceanography class.
W1: We know a fair amount about the circulation of water in the shallow ocean, but much less about the deep ocean. The deep ocean is vast—about 90 percent of the total volume of the ocean—and we know very little about it. We do know there’s a close relationship between the ocean and the atmosphere. A lot happens at the surface of the ocean, where water meets air, including some of the forces that drive ocean currents, such as ... what? What’s one thing that happens at the surface?
W2: The wind blows at the surface. The wind has a big effect.
W1: Yes, that’s right, it does. The wind has a major impact on surface water currents. In fact, water circulation at the surface is driven mainly by the wind. But what about the water in the middle and lower layers of the ocean? What drives the circulation of deep water?
M: Well, we know there are deep currents in the lower layers and near the bottom. Our book says that water movement in the deep ocean is slow, compared to how it is at the surface. That’s because the deep water is so much colder and so much heavier than the water at the surface.
W1: That’s right. This colder, heavier water moves much more slowly. The movement of the deep water is driven by gravity and caused primarily by changes in the density of seawater.
W2: So, it’s gravity that drives the water circulation in the deep ocean.
W1: That’s right. OK. Another thing we know is, what happens at the surface has an impact on what happens in the deep ocean. For example, one change at the surface is an increase in the water’s salinity—or saltiness—which can happen when the water evaporates or sea ice forms. And what happens when water gets saltier?
M: It gets heavier and denser. If it gets dense enough, it will sink downward until it reaches a level of equal density, or until it reaches the sea bottom.
W1: Yes, that’s right. The deeper you go, the denser it gets. The deepest water has the greatest density. And all of these properties—temperature, density, salinity—all play a crucial role in the ocean’s flow.
1. What does the professor mean by this statement:
"We know a fair amount about the circulation of water in the shallow ocean, but much less about the deep ocean."
2. According to the discussion, what factors influence the movement of water in the ocean?
3. How is the ocean’s deep water different from the water at the surface?
4. Why does the professor say this:
"The deeper you go, the denser it gets."
选项
A、To explain why oceanography is a challenging field
B、To emphasize a property of the ocean’s lower layers
C、To point out that visibility is poor in the deep ocean
D、To imply that the course will become more difficult
答案
B
解析
The professor’s purpose is to emphasize a property of the ocean’s lower layers. As the water gets deeper, it becomes denser. The professor also says The deepest water has the greatest density.
转载请注明原文地址:https://kaotiyun.com/show/YafO777K
0
托福(TOEFL)
相关试题推荐
Completethesummarybelow.WriteNOMORETHANTHREEWORDSforeachanswer.MajorProblemsofaCompanySincethecompanyopened
ChooseTHREEletters,A-F.WhichTHREEthingsarethestudentsrequiredtosubmittotheirprofessor?AawrittensummaryBnote
ChooseTHREEletters,A-F.WhichTHREEthingsarethestudentsrequiredtosubmittotheirprofessor?AawrittensummaryBnote
ChooseTHREEletters,A-F.WhichTHREEthingsarethestudentsrequiredtosubmittotheirprofessor?AawrittensummaryBnote
Completethenotesbelow.WriteONEWORDONLYforeachanswer.DevelopmentStudiesDevelopmentStudiesattemptstounderstand-
BeforeyoulistenLookatthetaskbelow.Trytoworkoutthesituationfromthetask.Whataretheytalkingabout?Whyarethey
WhichTWOcoursesdoesthesummerschooloffer?ApreparationcoursesforgraduatestudiesBteachertrainningCfutureemplo
HowtoMakePersonalControlofOne’sHealth【L31】________shouldtakechargeoftheirhealth.Thesinglegreatestthreattoheal
ResearchingtheoriginofmedievalmanuscriptsBackgroundMedievalmanuscripts—handwrittenbooksproducedbetweenthefifth
随机试题
函数f(x)=中,x3的系数为______.
麦芽除能消食外,还具有作用
差5天到预产期,臀位,30分钟前阴道流水,量很大,下列最恰当的处理是
A.氨茶碱B.米力农C.卡普托利D.硝酸甘油E.氢氯噻嗪可以扩张小静脉的药物是
我国班氏丝虫病的主要传播媒介是
A.催乳素B.催产素C.孕酮D.雌激素E.糖皮质激素()为泌乳启动所必需的激素
全民所有制单位之间产权界定应遵循的原则有( )。
下图所示为不同大洲著名的河流,读图回答问题。有关图示地域农业的说法,锗误的是()。
OnthemorningoflastFriday.Peterwenttoschoolasusual.Hewaswalkingalongtheroadwhenhesawawell【11】Hethoughtit
A、ThecircusBarnumandBaileywasthelargestinAmericanhistoryin1970.B、TheRinglingBrotherswastheonlycircusinAmeri
最新回复
(
0
)