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
The Ostrich The ostrich, the largest bird in the world at present, lives in the drier regions of Africa outside the actual de
The Ostrich The ostrich, the largest bird in the world at present, lives in the drier regions of Africa outside the actual de
admin
2019-08-15
78
问题
The Ostrich
The ostrich, the largest bird in the world at present, lives in the drier regions of Africa outside the actual deserts. Because of its very long, powerful legs and the floating effect of its extended wings, it is able to run at great speed over considerable distances.
The female ostrich normally produces about twenty eggs every rainy season. When the female ostrich begins to lay her eggs, however, she does not begin in her own nest. Instead she goes off in search of the nests of neighboring females and lays two or three eggs in each of them. By the time she has laid eight or nine eggs, she returns and lays the rest in her own nest.
Because of the size of the eggs, the female ostrich cannot lay more than one every two days, so it takes her three weeks to finish laying in her own nest. During that period, she spends a lot of time away from her nest looking for food. And while she is off her nest, other females visit it to lay their eggs amongst hers. By the time she is ready to sit on the eggs to hatch them, there could be up to thirty eggs in her nest, over half of which are not her own.
The female ostrich can comfortably cover only about twenty eggs when she is sitting on the nest so before settling down she pushes the surplus ten or so eggs out of the nest. The rejected eggs, however, never include any of her own. Each female is remarkably consistent in the size and shape of the eggs she produces, so it is not difficult for her to distinguish her own from those of strangers.
Of all the eggs laid by ostriches, only a very small number hatch into young birds. There are times when nests are left unprotected, for there are too few males to sit on all the nests at night. Thus there are ample opportunities for their natural enemies to raid the nests and eat the eggs. In fact, nearly 80% of the nests are destroyed. But even if a particular female’ s nest suffers this fate, there is a good chance that one or two of her eggs will be hatched in the nest of one of her neighbors.
When the female ostrich lays eggs in its own nest, she will never leave there in order to protect her eggs.
选项
A、TRUE
B、FALSE
C、Not Given
答案
B
解析
题干要求判断母鸵鸟在巢里产卵时是否不会离开巢里以保护她的卵。第三段提到母鸵鸟在产卵期间,“she spends a lot of time away from her nest looking for food”,即母鸵鸟会离开巢穴寻找食物,所以题干表述是错误的。
转载请注明原文地址:https://kaotiyun.com/show/MdkR777K
本试题收录于:
英语(一)题库公共课分类
0
英语(一)
公共课
相关试题推荐
当前世界各国处理双重征税问题时共同遵循的一条基本原则是属人优先原。【】
BessieColemanBessiewasborninAtlanta,Texasin1893.HerfatherwasanIndianandhermotheranAfricanAmerican.Herfa
ManageYour"High-tech"Family①Modernfamilylifeisimprovedonmanylevelsbynumerousadvancesintechnology.However,s
HowtoImproveaChild’sAppetiteMostchildrenwith【C1】______(health)appetitesarereadytoeatalmostanythingthatiso
TheOstrichTheostrich,thelargestbirdintheworldatpresent,livesinthedrierregionsofAfricaoutsidetheactualde
WanttheRightThingTight-lippedeldersusedtosay,"It’snotwhatyouwantinthisworld,butwhatyou【W1】______."
Alzheimer’sDiseaseAlzheimer’sdisease(阿尔茨海默症,又叫老年痴呆症)affectsmillionsofpeoplearoundtheworld.Americanresearcherss
StudentsandTechnologyintheClassroomIlovemyblackberry—it’smylittleconnectiontothelargerworldthatcangoanyw
TheName"UnitedNations"Thename"UnitedNations"was【C1】______(probable)devisedbyU.S.【C2】______(preside)FranklinD.Ro
ForgettingandMemoryThatexperiencesinfluencesubsequentbehaviourisevidenceofanobviousbutnevertheless【W1】______act
随机试题
根据增值税法律制度规定,___________应征收增值税。
利润表可以为会计报表使用者提供的信息有______、______、______、______。
下列哪几项能提示肺痈逆证
独立董事原则上最多在5家上市公司兼任独立董事,并确保有足够的时间和精力有效地履行独立董事的职责。( )
以下需列入非公开发行公司债券项目承接负面清单的有()。Ⅰ.地方融资平台公司Ⅱ.房地产公司Ⅲ.典当行Ⅳ.中国证券业协会会员的担保公司
毛泽东思想形成的阶级基础是
结合材料回答问题:材料1村民自治是村委会组织法规定的,是农民行使民主权利的重要形式,也是农村管理的重要形式。我们一定要保障农民的选举权利,坚定不移地做好村民自治和村委会村民直选。应该看到,绝大多数群众是有眼光、有识别能力的……村里的事务
在结构化程序设计中,模块划分的原则是
Whatdoesthemanmean?
A、It’soverthere.B、It’s9:30.C、It’stoolate.D、Itsoundsgood.BWhattimeisthenexttraintoBoston?
最新回复
(
0
)