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
35
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、Through the sense of touch.
B、Through the sense of smell.
C、Through intense narrow-band pulses of sound.
D、Through intense broad-band pulses of sound.
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3463121.html
相关试题推荐
Whatdowelearnabouttheaudienceatthemeeting?[originaltext]Asthenew
WhatdidAlexwanttoemphasizeattheendofhispresentation?[originaltext]
WhatdoesBarbara’shusbandsuggestshedoifshewantstowork?[originaltext]
WhatwasBarbara’sprofessionbeforeshehadchildren?[originaltext]Barbara
Whatdoesthemansayisimportanttobeinggoodathisjob?[originaltext]W:Wh
Wheredidthemangethisfirstjobaftergraduation?[originaltext]W:Whatsort
Whatdoesthemansayabouthisjob?[originaltext]W:Whatsortofhoursdoyou
[originaltext]W:Justimagine!Wehavetofinishreading300pagesbeforeMonda
[originaltext]W:Justimagine!Wehavetofinishreading300pagesbeforeMonda
[originaltext]W:Justimagine!Wehavetofinishreading300pagesbeforeMonda
随机试题
Inrecentyearsmoreandmorecompanieshaveinvolvedinthetideofincorp
IthasbeencalledtheHolyGrailofmodernbiology.Costingmorethan£2bi
铁的良好食物来源是()。A.畜肉 B.水果 C.水产品 D.谷类
结肠肿瘤大体型态分型?
前列腺增生患者行B超检查,膀胱逼尿肌处于失代偿状态是指残余尿量超过A:l0ml
端子箱及检修电源箱验收细则中,要求检修电源箱漏电保安器模拟短路或接地故障,动作值
根据下列材料回答问题 2007年上半年某镇完成工业总产值66625元,比去
拼多多财报上市后第一份业绩表 申论热点材料阅读 8月3
根据证券组合管理者对市场效率的不同看法,其采用的管理方法大致分为()A:被动管理
银行承兑汇票的承兑银行,应当按照票面金额向出票人收取()的手续费。A:千分之一
最新回复
(
0
)