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
2023-07-04
83
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,[17]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 kilometres away.
Whales and dolphins use sound in two ways: for communication and for echolocation.[18]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.
16. For whales and dolphins, which sense is most important?
17. How much faster does sound travel in the water than in the air?
18. How do 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
推断题。短文开头提到,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,对它们来说,最重要的是听觉,故答案为B)。
转载请注明原文地址:https://tihaiku.com/zcyy/2808035.html
相关试题推荐
[originaltext]W:Ineedacarthisweekend,butminehasbrokendown.M:I’ms
[originaltext]W:Ineedacarthisweekend,butminehasbrokendown.M:I’ms
[originaltext]Whenyoulearnaforeignlanguageyoumustlearnmorethanju
[originaltext]TheworldwideOrganizationoftheRedCrossstemsfromtheid
[originaltext]TheworldwideOrganizationoftheRedCrossstemsfromtheid
[originaltext]TheworldwideOrganizationoftheRedCrossstemsfromtheid
[originaltext]W:Tom,doyouhaveaminute?M:Oh,hi,Cathy,sure.Anything?W
[originaltext]W:Tom,doyouhaveaminute?M:Oh,hi,Cathy,sure.Anything?W
[originaltext]W:Tom,doyouhaveaminute?M:Oh,hi,Cathy,sure.Anything?W
[originaltext]W:Hello,professorDennis,mynameisSusanAdams.Ireadinuni
随机试题
It’ssaidthemostexcitingkindofeducationisalsothemostpersonal.No
Wehavejustboughtalargequantityofhigh-qualitysportsshoes,andweareab
下列关于股利分配政策的表述中,错误的有()。A.公司盈余的稳定程度与股利支付水平
在行政处罚听证程序中,当事人要求听证的,应当在行政机关告知有要求举行听证的权利后
把下面的六个图形分为两类,使每一类都有各自的共同规律或特征,分类正确的一项是:
某公司的制度工作日长度为8小时,4月份该公司对其员工张平进行工作日写实。写实结果
咳血方的功效是A.滋阴清热,凉血止血 B.泻肺泄热,凉血止血 C.清肝宁肺,
用于线路换位处及线路分段,承受断线张力和控制事故范围的电杆是( )。A.耐张杆
()泥化夹层一般不影响承载能力。A.深层 B.中层 C.浅层 D.表
患者女,30岁。1周来发热、尿频、尿急、尿痛伴腰痛,既往无类似病史。查体:体温3
最新回复
(
0
)