首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
From the goose that laid the golden egg to the race between the tortoise and the hare, Aesop’s fables are known for teaching mor
From the goose that laid the golden egg to the race between the tortoise and the hare, Aesop’s fables are known for teaching mor
admin
2012-06-26
40
问题
From the goose that laid the golden egg to the race between the tortoise and the hare, Aesop’s fables are known for teaching moral lessons rather than literally being true. But a new study says at least one such tale might really have happened.
It’s the fable about a thirsty crow. The bird comes across a jar with the water level too low for him to reach. The crow raises the water level by dropping stones into the jar. The moral tells: Little by little does the trick, or in other retellings, necessity is the mother of invention.
Now, scientists report that some relatives of crows called rooks used the same stone-dropping strategy to get at a floating worm. Results of experiments with three birds were published online by the journal Current Biology.
Rooks, like crows, had already been shown to use tools in previous experiments. Christopher Bird of Cambridge University and a colleague exposed the rooks to a 6-inch-tall clear plastic tube containing water, with a worm on its surface. The birds used the stone-dropping trick spontaneously and appeared to estimate how many stones they would need. They learned quickly that larger stones work better.
In an accompanying commentary, Alex Taylor and Russell Gray of the University of Auckland in New Zealand noted that in an earlier experiment, the same birds had dropped a single stone into a tube to get food released at the bottom. So maybe they were just following that strategy again when they saw the tube in the new experiment, the scientists suggested. But Bird’s paper argued there’s more to it: The rooks dropped multiple stones rather than just one before reaching for the worm, and they reached for it at the top of the tube rather than trying to reach the food at the bottom.
The researchers also said Aesop’s crow might have actually been a rook, since both kinds of birds were called crows in the past.
In the experiments, in order to eat the worm floating on the water surface, the rooks ______.
选项
A、found a way to raise the water level
B、broke the tube with larger stones
C、counted how many stones they would need
D、cooperated peacefully
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/SSTO777K
0
研究生英语学位课统考(GET)
相关试题推荐
Wedodealwithpaintingshere,butthisis______afurnitureshop.
Ateachercannotgive______attentiontoeachpupilifhisclassislarge.
Wewereobligedtoacceptitasfalseinthe______ofotherevidence.
Thecompanywill______toitsagreement,nomatterhowcostlytheprocessmaybe.(2002年中国人民大学考博试题)
Planningisaveryimportantactivityinourlivesyetreallysophisticated.Itcangivepleasure,evenexcitement,【C1】______ca
ThemiserablefateofEnron’semployeeswillbealandmarkinbusinesshistory,oneofthoseawfuleventsthateveryoneagreesm
Doeshappinessfavorthoseofaparticularage,sex,orincomelevel?Socialscientistshaveexplodedsomemythsaboutwho’s
Itisacommonthemeinmanysciencefictionstoriesthattheworldmayonedaybe______byinsects.
AnabandonedairfieldnearaformerNaziconcentrationtrampmaysoonfeaturepagodasandTaiChiparks.A$700millionproject
Psychologiststakeopposingviewsofhowexternalrewards,fromwarmpraisetocoldcash,affectmotivationandcreativity.Beha
随机试题
Howlongcanhumanbeingslive?Mostscientistswhostudyoldagethinkthatthehumanbodyis【C1】________tolivenolongerthan
抗阿米巴药分为哪几类?写出各类主要代表药。
公告、通告的署名和日期,一般放在全文最后居中的位置。
操作系统的基本功能是()。
稳定的财政政策包括()两个方面。
组织单位工程竣工验收的是()。
从潜在竞争对手的角度来看,以下哪个行业面临的威胁最小?
运用PDCA管理法提高饭店服务质量和工作质量时,包括__________个阶段,__________个步骤。()
在流动资产投资战略的选择上,如果一个公司是保守的,那么以下表述合理的有()。
公司中有若干个不同的部门,一个部门有多名员工,而每个员工分属不同的部门,则实体部门与实体员工间的联系是()
最新回复
(
0
)