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
58
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.
According to the passage, crows and rooks ______.
选项
A、are the same kind of birds with different names
B、are very different in behavior
C、had the same name in the past
D、were both used in the experiments
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/0STO777K
0
研究生英语学位课统考(GET)
相关试题推荐
Traditionalfairytalesarebeingditchedbyparentsbecausetheyaretoo______fortheiryoungchildren,astudyfound.(2013年北京大
Inthefinalanalysis,itisour______ofdeathwhichdecidesouranswerstoallthequestionsthatlifeputstous.(2013年3月中国科学
It’srudeto______peoplewhentheyarespeaking.
Thispolicygave______toprivatepropertyandledtodifferencesbetweentherichandthepoor.(2002年上海交通大学考博试题)
Thenewspapergaveaverydifferent______ofwhattookplace.
Thefull______ofchangesincomputertechnologywillbefeltwithinthenextfewyears.(2002年春季上海交通大学考博试题)
AloneinLondon,withoutfriends,workormoney,Shelleyfellinto______.
Peoplewith______dispositionsrecoverquicklyfromdisappointment.
Theprofessorcanhardlyfindsufficientgrounds______hisargumentinfavourofthenewtheory.
Psychologiststakeopposingviewsofhowexternalrewards,fromwarmpraisetocoldcash,affectmotivationandcreativity.Beha
随机试题
混合兼并
"Cool"isawordwithmanymeanings.Itsoldmeaningisusedtoexpressatemperaturethatisalittlebitcold.Astheworldh
男性,55岁,慢性上腹痛10余年,3个月来加重伴上腹胀,上消化道造影示胃窦溃疡。下列处理措施最佳的是
进行肌肉锻炼的注意事项不包括
一个大型建设项目如采用矩阵组织结构模式,则纵向工作部门可以是()部门。
绝热工程中,与保温绝热结构相比,保冷的绝热结构还应增加( )。
某航空公司2019年年初总占地面积10000平方米,其中:公安局下辖派出所占用土地200平方米,单独建造的地下建筑用地1000平方米(已取得地下土地使用权证)。2019年5月经批准占用耕地500000平方米,并于当月办妥占用耕地手续,其中用
幼儿园体育应以增强幼儿()为核心,全面、综合地为幼儿有一个强壮、健康的身体创造条件。
(2015年真题)下列犯罪中,属于结果犯的是()。
Muchoftheworldshouldgoonadietin2014.Morethanathirdofadults【C1】______wereestimatedtobe【C2】______orobesein20
最新回复
(
0
)