首页
登录
职称英语
[originaltext] The vast oceans of the world are dark, deep and mysterious plac
[originaltext] The vast oceans of the world are dark, deep and mysterious plac
游客
2024-02-19
4
管理
问题
The vast oceans of the world are dark, deep and mysterious places where eyesight counts for little as soon as you venture very far beneath the surface.
For humans, who live in a world dominated by visual stimuli, to exist in such conditions would be impossible. But for whales and dolphins that live in the ocean or, in the case of a few species, muddy rivers, the darkness is unimportant. What is important to them is sound.
Sound is an efficient way to transmit and sense information, especially as it travels five times faster through water than through air. If humans shout to someone, it is unlikely that they will be heard a kilometer away. But if a whale shouts in an ocean channel, another whale may hear it tens, if not hundreds, of kilometers away.
Whales and dolphins use sound in two ways: for communication and for echolocation. Dolphins and toothed whales communicate through a wide variety of high-frequency sounds.
But as well as using sounds to communicate, toothed whales and dolphins also rely on echolocation to learn about their immediate environment, including prey that might be waiting nearby. They produce intense short broad-band pulses of sound in the ultrasonic range. These clicks are brief, typically less than one millisecond long—but they are repeated many times each second.
选项
A、Sense of sight.
B、Sense of hearing.
C、Sense of smell.
D、Sense of taste.
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3463118.html
相关试题推荐
[originaltext]M:Isupposeyoumusthaveheardaboutthatgreatpieceofconcre
[originaltext]M:Comein.Pleasetakeyourseat.W:Thankyou.M:Nowcouldyo
[originaltext]W:Youlookgreatsinceyou’vebeentakingtheYogaexercise.M:T
[originaltext]M:IsJanelookingforwardtogoinghomeforthissummer?W:She
[originaltext]M:Ididn’tnoticeyou’dchangedyourhairstyle.W:Notveryobse
[originaltext]A$150millionprojecttoreplacealloftheverticalsuspens
[originaltext]ManyyoungpeopleintheUnitedStatesneverfinishhighscho
[originaltext]M:CanIjusttalktoyouforaminuteaboutthehistoryassignme
[originaltext]W:Hey,Jack,let’sgoforacupofcoffeeandhavesomerefreshm
[originaltext]W:Howmuchtimedidyouspendonthebook?M:Thefirstthreepa
随机试题
Mostlibrariesrequireyoutoregisterbeforeyouareallowedtoborrowanyo
MarsfascinatesscientistsbecauseofitssimilaritytoEarth,anditfasci
Theresultofautomationmaywellbeanincreaseinemployment,sinceitis
血糖超过肾糖阈值可出现A.生理性血糖降低 B.生理性血糖升高 C.尿糖 D
下列哪一项不属于生理性哭闹A、夜啼 B、肠绞痛 C、饥饿与不适 D、疼痛
各级人民政府及其有关部门应当建立严格的突发事件()A.信息通报制度 B.
毛笔:竹子A.汤圆:糯米 B.手电:电流 C.皮鞋:道路 D.玻璃:琉璃
甲公司和乙公司签订技术合作开发合同,在合同履行过程中甲公司认为乙公司提供的技术不
固体分散体中,药物与载体形成低共熔混合物时,药物的分散状态是A.分子状态 B.
竣工验收依据文件在工程建设中形成的依据包括( )。A.批准的概算 B.发包单
最新回复
(
0
)