首页
登录
职称英语
One of the mysteries of nature is animal communication. Creatures of the s
One of the mysteries of nature is animal communication. Creatures of the s
游客
2023-11-23
66
管理
问题
One of the mysteries of nature is animal communication. Creatures of the sea move through their liquid element without any hearable sound. Yet they are able to sense the silent passing or attack of others of their kind. This is because bodies moving in water create a pressure wave, something like a gust of wind produced by a passing automobile. A narrow sensor system running along each side of the shark, from eye to tail, receives and interprets these pressure waves. I have seen sharks appear swiftly, obviously drawn by the motion of a diver’s hands, which had sent out strong waves.
One might think it impossible to distinguish odors in water. Yet sharks, surprisingly, are able to follow a scent across miles of ocean and arrive at its exact source. A diver who spears a fish and attaches its bloody body to his belt, and then goes on with the hunt, be comes a natural prey to the shark. I have seen sharks follow a scent exactly like the dogs of a hunting pack. It is no wonder th at the Greeks gave them the name "hounds of the sea."
One of the most widely believed — and dangerous — legends about the shark is that he has poor eyesight. On the contrary, the shark is well equipped to see at a distance and to dis tinguish among forms. This fact was proved to me one day when I went into the water off the coast of Africa. I sighted a shark at some distance from me as I was floating at a very shallow depth. Since I was making no movement, the sound of bubbles from my diving appa- ratus would be confused with the light splashing of the water on a rock. I turned my eyes away for a few seconds, to study the design of a giant ray just beneath me. I am not sure now whether it was simple instinct or a feeling of movement, but I turned back abruptly to ward the location of the shark. And, immediately, every muscle of my body tensed. He was no more than 30 feet away, launched toward me as hard and swift as a missile.
The sight of a shark coming at you head-on is strange. Obviously it is from this angle that he seems most frightening-the very symbol of evil, with the half-opened mouth and the three regularly spaced fins (鳍). When the shark had approached to within two feet of the rubber fins I had thrown at him as a gesture of self-defense, he turned suddenly and swam back toward the depths. There had been no sound, no scent. It appears certain that sight alone was responsible for this approach. [br] The best title for the passage is__________.
选项
A、The Mysteries of Animal Communication
B、Something Unknown About Sharks
C、An Adventure
D、How Divers Discover Sharks Under the Sea
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3213452.html
相关试题推荐
Withtheincreasingdemandsofnewmedicines,animaltestingisinwidespread
Thatlargeanimalsrequirealuxuriantvegetation,hasbeenageneralassumpt
Thatlargeanimalsrequirealuxuriantvegetation,hasbeenageneralassumpt
Thatlargeanimalsrequirealuxuriantvegetation,hasbeenageneralassumpt
Thatlargeanimalsrequirealuxuriantvegetation,hasbeenageneralassumpt
Thatlargeanimalsrequirealuxuriantvegetation,hasbeenageneralassumpt
PassaaeFourWhenmostanimalsdie,naturelikestotidyupbymakingth
PassageFour[br]What’sthebesttitleforthepassage?Nature,NurtureandE
Manyanimalandevenplantspeciescommunicatewitheachother.Humansare
Manyanimalandevenplantspeciescommunicatewitheachother.Humansare
随机试题
[originaltext]W:Goodafternoon,sir.AnythingIcandoforyou?M:Yes,I’dli
学习和研究科技哲学的意义包括( )。A.推动科学哲学学科的发展 B.保护生态
MPLS是一种更通用的QoS保证机制,其基本思想可简述为()A.标记交换路由器
开展区块链技术的商业试探性应用,属于国家信息化体系中的( )要素。A.信息技术
对风湿性心脏病孕妇分娩期的处理正确的是A.除有产科指征外,不需行剖宫产 B.宫
(2016年真题)以下不属于考虑风险调整的基金业绩评估指标的是()。A.特
下列有关白血病的叙述,正确的是A.属于造血系统的恶性肿瘤B.是一组高度均质性的恶
机电产品国际招标项目,在_情况下,投标保证金将被没收,不得返还。()A.投
在学习中,学习者利用一定的记忆术帮助掌握知识,这种学习策略属于(。)。A.精细加
某医生从三甲医院跳槽去了一家诊所,带走了病人的联系方式并给这些病人打电话告知这家
最新回复
(
0
)