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
专升本
Most animals have little connection with animals of a different kind, unless they hunt them for food. Sometimes, however, two ki
Most animals have little connection with animals of a different kind, unless they hunt them for food. Sometimes, however, two ki
admin
2011-05-26
63
问题
Most animals have little connection with animals of a different kind, unless they hunt them for food. Sometimes, however, two kinds of animals come together in a partnership(伙伴关系) which does good to both of them. You may have noticed some birds sitting on the backs of sheep. This is not because they want a ride, but because they find easy food in parasites(寄生虫) on sheep. The sheep allow the birds to do so because they remove the cause of discomfort. So although they can manage without each other, they do better together.
Sometimes an animal has a plant partner. The relationship develops until the two partners cannot manage without each other. This is so in the corals (珊瑚) of the sea. In their skins they have tiny plants which act as "dustman", taking some of the waste products from the coral and giving in return oxygen which the animal needs to breathe. If the plants are killed, or are even prevented from light so that they cannot live normally, the corals will die.
Some birds like to sit on a sheep because ______.
选项
A、they can eat its parasites
B、they depend on the sheep for existence
C、they enjoy travelling with the sheep
D、they find the position most comfortable
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/1SqC777K
本试题收录于:
英语题库成考专升本分类
0
英语
成考专升本
相关试题推荐
Ihavecometounderstandthatallrightscarrywiththe______(correspond)responsibilities.
Johnpromisedtokeephismother______ofhowthingsweregoingonwhenhestudiedinEngland.
Thefirstsailorpretendedtobeillbecausehewantedto______.Thepatientsfeltbetterquicklybecause______.
Thefirst-yearstudentswerelearningfromthearmyinMiyun,asuburbofBeijingnear______Ilived.
WhydidKathyAllenneedtofindherbirthmother?Howisfindingabirthmotherlikegettingakeytoadiary?
Accordingtothepassage,theauthorthinksofeachinterviewas______.Whenhuntingajob,you’dbettercommunicatewithpeop
Forthispart,youareallowed30minutestowriteacompositiononthetopic:TheFirstLettertoa’PenPal’.Youshouldwrite
Therewerealotof______waitingoutsidethetheatretoseethefamouspopsinger.
Ilikeblackcoffeeverymuch.Thestrongeritis,
PeoplejokethatnooneinLosAngelesreads;everyonewatchesTV,rentsvideos,orgoestothemovies.Themostpopularreading
随机试题
学生因获得满意的学习结果而更愿意学习,因获得不满意的学习结果而厌恶学习。这符合桑代克提出的()。
下列关于计算机存储器的叙述中,正确的是
下列对于冠脉血流特征的描述,哪些是正确的
国际单位制的基本单位,质量是克。()
法律体系的基础是( )。
关于项目结构图和组织结构图的说法,正确的有()。
建筑安装工程税金是指按国家规定应计入建筑安装工程造价的( )。
某商场的下列店堂告示中,违反《中华人民共和国消费者权益保护法》的是:( )。
中央处理机启动外设工作的过程是()。
关注人格研究的心理学流派包括
最新回复
(
0
)