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
What evolutionary change in birds led to a nest’s building?
What evolutionary change in birds led to a nest’s building?
admin
2014-01-10
47
问题
What evolutionary change in birds led to a nest’s building?
Many egg-laying animals merely lay their eggs and leave. Turtles, for instance, and horseshoe crabs, the eggs are hatched and the little ones are on their own. The current theory about birds is the earliest birds did just that when they were cold-blooded creatures living in warm places. However, when they became warm-blooded creatures living in cold places, they had to remain on the eggs to keep them warm. For this, they needed a place—a nest. Very likely, the first nest was just a primitive hole scraped in the ground. Even now many species still lay eggs in this sort of crude nest. Primitive nests found on the ground were fine for some birds, but others began to elevate their nests in branches, perhaps to avoid predators. These early elevated nests were probably cup-shaped nest. This type is still built by some birds today. The latest development in nest, the most recent vision, so to speak, is the cup-shaped nest. This is the one we regard today as the typical bird’s nest, you know, like a robin’s nest.
选项
A、Their flying ability improved greatly.
B、They became warm-blooded.
C、They began to lay eggs.
答案
B
解析
文中此句For this,they needed a place—a nest中的For this是指上文when they be-came warm-blooded creatures living in cold places,they had to remain on the eggs to keepthem warm,故B项正确。
转载请注明原文地址:https://www.kaotiyun.com/show/DakK777K
本试题收录于:
D类竞赛(专科)题库大学生英语竞赛(NECCS)分类
0
D类竞赛(专科)
大学生英语竞赛(NECCS)
相关试题推荐
A.informedB.careerC.presentingD.relevantE.successfulF.effortG.remindedH.consideringI.deliberatelyJ.stress
A.sothatB.wiseC.barelyD.exerciseE.groupF.describingG.thoughtH.probablyI.capabilitiesJ.assistanceK.
A.sothatB.wiseC.barelyD.exerciseE.groupF.describingG.thoughtH.probablyI.capabilitiesJ.assistanceK.
A.sothatB.wiseC.barelyD.exerciseE.groupF.describingG.thoughtH.probablyI.capabilitiesJ.assistanceK.
A.sothatB.wiseC.barelyD.exerciseE.groupF.describingG.thoughtH.probablyI.capabilitiesJ.assistanceK.
A.incomeB.polarizationC.transformationsD.oldE.changesF.worseG.relaxedH.therebyI.divisionJ.accompanying
A.incomeB.polarizationC.transformationsD.oldE.changesF.worseG.relaxedH.therebyI.divisionJ.accompanying
ImproveYourPublicSpeakingSkills1.Practiceina【T1】______environment【T1】______■Receivefeedbackabout
People’sattitudestowardworkvary.Somelivetowork.Others,however,worktolive.Whatisyouropinion?WriteonANSWER
Manypeople,especiallygirls,wouldliketoloseweightbyeatingless.Whatisyouropinionaboutit?WriteonANSWERSHEE
随机试题
A、Thepolicewillbetherewithteargas.B、Itwilllastalmost11hourstomorrow.C、Itwillbeheldonthecampus.D、Cleo’ssis
当用户拨号接入网络时,用户计算机获得一个临时的IP地址,用户退出时,IP地址被收回,这称为IP地址的______。
对未确诊的孕妇常做哪些检查以协助诊断
某派出所所长华某为了创收,指派联防队员葛某与他人合谋“做路子”抓卖淫女,派被告人谢某带卖淫女到集镇上指认嫖客。2000年8月3日,回家探亲的某大学学生李某被华某、谢某等人以嫖娼为由予以拘留,并遭到体罚和殴打,造成脑震荡等后遗症,被迫承认曾经参与嫖娼。据此华
房地产经纪执业基本原则不包括()。
税务代理的原则包括()。
农民耕种的自留地的所有权属于国家。()
理论和实践的具体的、历史的统一,是指:()。
“教活书,活教书,教书活”这是()的言论。
若直线ax+by=3与圆c:x2+y2=4有两个不同的交点,则点P(a,b)与圆c的关系是
最新回复
(
0
)