首页
登录
职称英语
Why don’t birds (71) lost on their long flights from one place to another?
Why don’t birds (71) lost on their long flights from one place to another?
游客
2023-09-26
7
管理
问题
Why don’t birds (71) lost on their long flights from one place to another? Scientists have puzzled over this (72) for many years. Now they are beginning to fill (73) the blanks.
Not long ago, experiments (74) that birds rely on the sun to guide them (75) daylight, hours. But what about birds (76) fly by night? Tests with artificial stars have proved that (77) night - flying birds are able to follow the stars in their long - distance (78) A dove had spent its lifetime in a cage and had never flown under a (79) sky. Yet it showed a(n) (80) ability to use the stars for guidance. The bird’s cage was placed under a (n) (81) star - filled sky. The bird tried to fly in the position as that (82) by his outdoor cousins. Any (83) in the position of the make believe stars caused a change (84) the direction of his flight.
(85) think that doves, when flying in daylight, use the sun for (86) . But the stars are (87) their principal means of navigation. What do they do when the stars are (88) by clouds? Apparently, they find their way by such landmarks as (89) ranges, coast lines, and river courses. But when it’s too dark to see (90) , the doves circle helplessly, unable to get their bearing(方位). [br]
选项
A、problem
B、issue
C、question
D、dispute
答案
C
解析
“this question”是指代前面的问句,这里用 question比用problem要相互呼应紧密、自然一些。
转载请注明原文地址:https://tihaiku.com/zcyy/3046560.html
相关试题推荐
Heinsistedonpurchasinganotherhouse,whichhehadnousefor.A、他已经没有什么用处了,但还
Koalas(考拉熊)usearangeofsoundstocommunicatewithoneanother______relativ
Allofuscommunicatewithoneanothernonverbally,aswellaswithwords.Mo
ProfessorLeeissaid______anotherimportantdiscoveryinphysics.A、tomakeB、h
[originaltext]M:Itseemsthatwe’llhaveanotherfinedaytomorrow.Let’sgot
Studentswhoflyhalfwayacrosstheworldtostudyinanothercountrygetusedt
[originaltext]W:Mr.Long,canyoutransfermetoanotherdepartment?M:Why?G
AnothervirtueAmericansrespectisperseverance.RememberAesop’sfableabou
Faces,likefingerprints,arenotthesameasoneanother.Didyoueverwond
Heinsistedonpurchasinganotherhouse,whichhehadnousefor.A、他坚持要再买一套住房,尽管
随机试题
Ifyouask20randomgraduatestoexplainwhytheywenttobusinessschool,
Whyaresleddogssaidtobephysicalwonders?[br]Theideaofusingdogstopu
铜字常用字体不包含哪种字体()。A.隶书体 B.行书体 C.楷书体 D.标
CPU不能直接访问的存储器是( )。A.RAM B.ROM C.Cache
中国铁路在运输市场竞争日趋激烈的压力下,正在通过发展代理制来()。A.扩大其产
2002-37.外敷有发泡作用,皮肤过敏者忌用的药物是 A.半夏B.天南星
望梅止渴:曹操() A.程门立雪:杨时B.退避三舍:项羽 C.怒发冲冠:
《中华人民共和国贷款通则》有关期限的相关规定的说法中,错误的是()。A.自营贷
下列关于资本成本用途的说法中,不正确的是()。A.在投资项目与现有资产平均风险不
男,52岁。乏力、腹胀1年,加重伴腹痛2天。慢性乙型肝炎病史12年。查体:T3
最新回复
(
0
)