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
Recent research from animal behaviorists suggests that "as the crow flies" should no longer be taken to mean "the shortest dista
Recent research from animal behaviorists suggests that "as the crow flies" should no longer be taken to mean "the shortest dista
admin
2019-08-27
94
问题
Recent research from animal behaviorists suggests that "as the crow flies" should no longer be taken to mean "the shortest distance between two points." Zoologists at Oxford University,【C1】______conducted an eighteen-month【C2】______of homing pigeons, have concluded that under some circumstances, pigeons follow【C3】______visual landmarks to find their way home【C4】______than taking the shortest, most direct route.【C5】______for their ability to navigate long distances, homing pigeons use the【C6】______of the sun and stars, their inbuilt compasses, and perhaps also their sense of smell to direct their flight over long【C7】______or on a journey for the first time.【C8】______, different factors appear to affect a pigeon’s navigation【C9】______it is released close to its【C10】______. Animal behaviorists reached this【C11】______after attaching small global positioning devices to the backs of pigeons and releasing them a few miles from their home. These devices enabled the scientists to【C12】______the precise location of each pigeon every second of【C13】______flight. Each pigeon was tracked for approximately twenty flights from the【C14】______point. For the first several flights, each bird’s path【C15】______significantly from the paths it had taken【C16】______. Subsequently,【C17】______, the bird would tend to follow the same path,【C18】______after flight, even though that path was not always the most direct route home. The scientists concluded that pigeons use a【C19】______of familiar visual landmarks to find their way when they are near their home rather than relying primarily on compass navigation. Major highways are one【C20】______landmark. Almost comically, some of the pigeons followed the path of a major highway they could see below them, turning where the road turned, and even following the circular path of the exit ramps.
【C9】
选项
A、when
B、until
C、still
D、since
答案
A
解析
前面提到了长距离飞行,此处是说当信鸽被放飞到家附近的地方时,它的导航能力似乎会受不同因素的影响。因此应选表示时间的连词when“当……时”,因此答案为A。
转载请注明原文地址:https://kaotiyun.com/show/lOUO777K
0
考博英语
相关试题推荐
Graphenemustsurelybeoneofthemostexcitingdevelopmentsinmodernscience.Indeed,thesubstanceissoextraordinarythat
Anythingtodowitholdmythsandlegends______me.
Intheprocessofacquiringknowledge,asmuchcanbelearnedfromseekingasfromfinding,fromjourneysasfrom______.
Findingsfromseveralstudiesoncorporatemergersandacquisitionsduringthe1970sand1980sraisequestionsaboutwhyfirmsi
Environmentalists______thatitwillnotbeeasytopersuadecardriverstousetheirvehicleslessoften.
ProfessorTaylor’stalkhasindicatedthatsciencehasaverystrong______ontheeverydaylifeofnon-scientistsaswellasscie
Theyearsbetween1870and1895broughtenormouschangestothetheaterintheUnitedStatesastheresidentcompanywasundermi
Thereisprobablynolimittowhatsciencecandointhewayofincreasingpositiveexcellence.【T1】Healthhasalreadybeengrea
Whyaresomeofusgoodatmath,orwriting,whileothers______atartorbasketball?
AtleastsincetheIndustrialRevolution,genderroleshavebeeninastateoftransition.Asaresult,culturalscriptsaboutm
随机试题
1985年8月,美国博雅公共关系公司与中国新闻发展公司签约成立了我国第一家公共关系专业公司,即____________。
莎士比亚四大悲剧是《哈姆雷特》、《奥赛罗》、《李尔王》和【】
男性,52岁。每日早晨5时左右胸骨后疼痛,查体:心脏不大,无杂音。发作时心电图呈STⅡ,Ⅲ,aVF抬高,约30min后恢复正常。其诊断最可能是
善于清胃而止呕的药物是
关于规章,下列哪一说法是正确的?
建设工程民事纠纷的处理方式主要包括()。
货币市场基金需披露()。
一位颇有名望的美国富商在散步时,遇到一个瘦弱的摆地摊卖旧书的年轻人,他缩着身子在寒风中啃着发霉的面包。富商怜悯地将8美元塞到年轻人手中,头也不回地走了。没走多远,富商忽又返回,从地摊上捡了两本旧书,并说:“对不起,我忘了取书。其实,您和我一样也是商人!”
不具备正式公文的法定权威性与行政约束力的是()。
(1)在名称为Form1的窗体上添加一个名称为Label1、标题为“添加项目:”的标签;添加一个名称为Textl的文本框,初始内容为空;添加一个名称为Combol的下拉式组合框,并通过属性窗口输入若干项目(不少于3个,内容任意);再添加两个命令按钮,名称分
最新回复
(
0
)