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
自考
Homing pigeons are placed in a training program from about the time they are twenty-eight days of age. They are taught to enter
Homing pigeons are placed in a training program from about the time they are twenty-eight days of age. They are taught to enter
admin
2022-07-19
24
问题
Homing pigeons are placed in a training program from about the time they are twenty-eight days of age. They are taught to enter the loft (鸽房) through a trap and to exercise above and around the loft, and gradually they are taken away for short distances in baskets and released. They are then expected to find their way home in the shortest possible time.
In their training flights or in actual races, the birds are taken to pre-arranged distant points and released to find their way back to their own lofts. Once the birds are liberated, their owners, who are standing by at the home lofts, anxiously watch the sky for their return. Since time is of the essence, the speed with which the birds can be directed to enter the loft trap may make the difference between gaining a win and a second place.
The head of a homing pigeon is comparatively small, but its brain is one quarter larger than that of the ordinary pigeon. The homing pigeon is very intelligent and some have been known to fly a hundred miles off course to avoid a storm.
Some homing pigeon experts claim that this bird is gifted with a form of built-in radar that helps it find its own loft after hours of flight, for the birds have two very sensitive ears hidden under the head feathers, while the sharp, prominent eyes can see great distances in daytime.
Why do homing pigeons fly home? They are not unique in this inherent skill; it is found in most migratory birds (候鸟) , and in bees, ants, toads and even turtles, which have been known to travel hundreds of miles to return to their homes. But in the animal world, the homing pigeon can be trusted with its freedom and trained to carry out the missions that people demand.
According to the passage, the difference between a homing pigeon and an ordinary one lies in________.
选项
A、the span of the wings
B、the shape of the eyes
C、the texture of the feathers
D、the size of the brain
答案
D
解析
细节理解题。由第三段第一句“The head of a homing pigeon is…”可知,正确答案为D。
转载请注明原文地址:https://kaotiyun.com/show/g5rx777K
本试题收录于:
英语阅读(一)题库文史类分类
0
英语阅读(一)
文史类
相关试题推荐
IamspeakingnotasaBriton,notasaEuropean,notasamemberofawesterndemocracy,【C1】______.Theworldisfullofconf
"Outthroughthatwindow,exactlythreeyearsago,【C1】______.Theynevercameback.Incrossingthecountrytotheshooting-gr
"Outthroughthatwindow,exactlythreeyearsago,【C1】______.Theynevercameback.Incrossingthecountrytotheshooting-gr
Somepeoplebelievethatinternationalsportcreatesgoodwillbetweennationsandthat,ifcountriesplaygamestogether,theyw
Somepeoplebelievethatinternationalsportcreatesgoodwillbetweennationsandthat,ifcountriesplaygamestogether,theyw
Itisdifficulttoimaginewhatlifewouldbelikewithoutmemory.Themeaningsofthousandsofeverydayperceptions,thebases
Onthefourthdayofhissojourn,theTimeTravelerunderstandswhytheEloiareterrifiedafternightfall.【C1】______Following
Beverywaryofopinionsthatflatteryourself-esteem.【T1】Bothmenandwomen,ninetimesoutoften,arefirmlyconvincedofth
Whatfactorsshouldbetakenintoconsiderationinchoosingadictionary?
GeorgeBernardShaw’splayMrs.Warren’sProfessionisabout______.
随机试题
引起Ⅱ型呼吸衰竭最重要的机制是
非甾体抗炎药是一类不含有甾体结构的抗炎药,自阿司匹林于1898年首次合成后,100多年来已有百余种上千个品牌上市。以吲哚美辛为代表的芳基烷酸类非甾体药在临床的作用是
依据《特种设备安全监察条例》的规定,特种设备投入使用前,使用单位应当核对其是否附有()规定的相关文件。
下列不属于火灾探测报警系统组成部件的是()。
能够让理财师在与不同客户沟通时,比较容易把握其在财务决策时的心理的客户分类方法是()。
下列项目中,能同时引起资产和利润总额减少的项目有()。
(Ⅰ)设0<x<+∞,证明存在η,0<η<1,使;(Ⅱ)求η关于x的函数关系的具体表达式η=η(x),并求出当0<x<+∞时函数η(x)的值域.
若有定义:charc;intd;,程序运行时输入:c=1d=2<回车>,能把字符1输入给变量c、把整数2输入给变量d的输入语句是()。
"Down-to-earth"meanssomeoneorsomethingthatishonest,realisticandeasytodealwith.Itisapleasuretofind【C1】______wh
Speech--theactofutteringsoundstoconveymeaning--isakindofhumanaction.Likeanyotherconstantly【S1】______action,sp
最新回复
(
0
)