首页
登录
职称英语
[originaltext] The vast oceans of the world are dark, deep and mysterious pl
[originaltext] The vast oceans of the world are dark, deep and mysterious pl
游客
2024-02-08
37
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 kilometre away. But if a whale shouts in an ocean channel, another whale may hear it tens, if not hundreds, of kilometres 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.
Questions 16 to 18 are based on the passage you have just heard.
16. For whales and dolphins, which sense is most important?
17. How much faster does the sound travel in the water than in the air?
18. How do the dolphins and toothed whales communicate?
选项
A、Sense of sight.
B、Sense of hearing.
C、Sense of smell.
D、Sense of taste.
答案
B
解析
选项中的sense of sight/hearing/smell/taste表明,本题与某种感官有关。短文中提到,但是对于生活在海洋和河流里的海豚和鲸类,所处环境黑暗与否对于它们来说无关紧要,声音才是最重要的,由此可推断出,对于它们来说最重要的是听觉,故答案为B)。but转折处为常考点,听音时应注意。
转载请注明原文地址:https://tihaiku.com/zcyy/3433064.html
相关试题推荐
[originaltext]WhenJustinBassettinterviewedforanewjob,heexpectedth
[originaltext]WhenJustinBassettinterviewedforanewjob,heexpectedth
[originaltext]"TheSanFranciscoBayAreaistheplaypenofcounterculture,
[originaltext]"TheSanFranciscoBayAreaistheplaypenofcounterculture,
[originaltext]W:Youdon’tlooktoowell.Maybeyoushouldtakethedayofffro
[originaltext]W:Youdon’tlooktoowell.Maybeyoushouldtakethedayofffro
[originaltext]W:Youlookbettertoday.Howdidyourtestgo?M:Muchbetterth
[originaltext]W:Youlookbettertoday.Howdidyourtestgo?M:Muchbetterth
[originaltext]M:StevenHawkingwarnsthathumanswillhavetomovetootherpl
[originaltext]M:StevenHawkingwarnsthathumanswillhavetomovetootherpl
随机试题
Youprobablyhavenoticedthatpeopleexpresssimilarideasindifferentway
Broadbandconnectivityisatransformativetooltoachievethethreepillarsof
WhoshowedLangLanghowtocontrolthekeys?[br]WhenLangLanggavehisfirst
下列哪项属三级预防内容A.康复治疗 B.疾病筛检 C.遗传咨询 D.横断面
患者,女,53岁,绝经4年,近20日再现阴道流血。查子宫稍大稍软。护理评估时,应
脉压增大可见的疾病是A.甲状腺功能亢进 B.心包积液 C.缩窄性心肌炎 D
仪器仪表的保管、使用环境条件以及运输中的冲击、振动应符合其技术性能要求。
耶鲁大学的阿尔德福对马靳洛的需要层次理论进行了修改和完善,修改后的马靳洛理论成为
根据《证券公司监督管理条例》,下列关于证券公司独立董事的表述中,正确的有()。A
关于心身疾病的治疗原则描述不正确的是A、不间断发泄 B、矫正不良习惯 C、心
最新回复
(
0
)