首页
登录
职称英语
[originaltext] Whales are huge, but difficult to see, which adds to their my
[originaltext] Whales are huge, but difficult to see, which adds to their my
游客
2023-08-05
53
管理
问题
Whales are huge, but difficult to see, which adds to their mystery and fascination. They are highly intelligent animals with an elaborate social life, no possessions and the complete freedom of movement in three dimensions.
Blue whales are difficult to weigh because of their size, nevertheless, at up to 200 tons, even an ordinary-sized whale is a vast and impressive creature. Their tongues can weigh as much as an elephant; their hearts weigh as much as an automobile. Quite a size!
As their names suggest, blue whales look true blue underwater, but on the surface their color is more like blue-gray. Their underbellies take on a yellowish color from the millions of micro-organisms that take up residence in their skin.
Blue whales live in all the world’s oceans, occasionally swimming in small groups, but usually alone or in pairs. They often spend summers feeding in polar waters and undertake lengthy migrations towards the equator as winter arrives. These graceful swimmers cruise the ocean at more than five miles an hour, but accelerate to more than 20 miles an hour when they are angry. Blue whales are among the loudest animals on the planet. They emit a series of pulses, groans and moans, and it’s thought that, in good conditions, blue whales can hear each other up to 1,000 miles away. Scientists think that they use these methods not only to communicate, but, along with their excellent hearing, to navigate the lightless ocean depths.
Questions 9 to 11 are based on the passage you have just heard.
9.Why are blue whales difficult to weigh?
10. Why do we call the animals blue whales?
11.How do blue whales communicate with each other over long distance?
选项
A、By emitting a series of pulses, groans and moans.
B、By cruising the ocean at more than 20 miles an hour.
C、By changing the color of their backs.
D、By giving out yellowish light.
答案
A
解析
短文中提到,它们发出一系列的脉冲、呻吟声和呜咽声,据猜测,在条件好的情况下,蓝鲸可以在1,000英里以外的地方听到彼此的声音。科学家认为它们用这些方法不仅可以相互沟通,加上它们极好的听力,还可以在昏暗的海洋深处前行。因此答案为A)。
转载请注明原文地址:http://tihaiku.com/zcyy/2900574.html
相关试题推荐
[originaltext]Weatherisaconstantforceinourlives,butthereislittlemar
[originaltext]IworkinadvertisingandIliketokeepupwithcurrenttrends,
[originaltext]IworkinadvertisingandIliketokeepupwithcurrenttrends,
[originaltext]Toachievefinancialsecurity,howmuchyousaveisalwaysmorei
[originaltext]TheideatostudytheAmericanIndiantribeTarahumarascamet
[originaltext]WhilesomescientistsexplorethesurfaceofAntarctica,other
[originaltext]WhilesomescientistsexplorethesurfaceofAntarctica,other
[originaltext]W:Howdoyoulikebeingself-employed?M:Thereareobviousbene
[originaltext]W:Howdoyoulikebeingself-employed?M:Thereareobviousbene
[originaltext]W:Howdoyoulikebeingself-employed?M:Thereareobviousbene
随机试题
WhatissueisNorthKoreawillingtodiscusswithSouthKoreaaccordingtoforme
TheDoctorWillSkypeYouNowA)Faz
TheInternetAdvocateA)Contrarytothemannerinwh
施工现场管理执行的主要标准包括()。A.技术类标准、管理类标准、行为类标准
下列()是流动相似不必满足的条件。A.几何相似 B.必须是同一种流体介质
甲企业是一家大型软件企业,经常承揽一些复杂的大型软件项目。为保证各部门之间的协作
A.经方B.秘方C.验方(偏方)D.时方E.协定处方在民间流行,有一定疗效的处方
脑脊液静置12~24小时后出现薄膜见于( )。A.化脓性脑膜炎 B.结核性脑
共用题干某品牌汽车销售商为了对该品牌汽车的销售情况做出准确判断,需要对汽车市场
2016年6月6日起,中国人民银行将个人投资认购大额存单的起点金额调整到(
最新回复
(
0
)