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
33
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
The______goalofthebookistohelpbridgethegapbetweenresearchandteachi
事实上,世上许许多多人,特别是知识分子,都在不断地学习。我们不仅在课堂上学,而且在课外学。我们不仅从书本上学,而且从亲身经历中学。俗话说,“学无止境”。学习是一
Ifyoudesireaninterview,Ishallbemosthappytocallinperson,Onanydayan
公司的发起人在公司成立后抽逃其出资的,由公司登记机关责令改正,处以()的罚款。
各单位应建立对评价人员的()机制,鼓励发现问题。奖惩$;$激励$;$提拔$;$表
()股东在股东大会上无表决权,在参与公司经营管理上受到一定限制。A:普通股 B
( )是指企业为了把握员工的薪酬总额、薪酬结构和薪酬形式,所确立的薪酬管理导向
业主大会成立后,新选聘的物业服务企业与原物业服务企业交接时的物业承接查验工作由(
2020年10月份,全国十种有色金属产量497万吨,同比增长4.6%,增速同比回
(2021年真题)建设工程项目风险有多种类,承包方技术管理人员能力欠缺属于(
最新回复
(
0
)