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
64
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、guidance
B、direction
C、light
D、guide
答案
A
解析
guidance和guide同源,都是名词。但前者意为“引导、指导”,后者意为“导游”。
转载请注明原文地址:http://tihaiku.com/zcyy/3046574.html
相关试题推荐
[audioFiles]audio_ehaz20076_001(20076)[/audioFiles]A、Takeanotherinterview.B、
Aninsectisnotafraidofgravity,butitisindeadlyfearofanotherforc
Thereisanotherproblem______(discuss)inthenextmeeting.tobediscussed非谓语
Koalas(考拉熊)usearangeofsoundstocommunicatewithoneanother______relativ
ProfessorLeeissaid______anotherimportantdiscoveryinphysics.A、tomakeB、h
Studentswhoflyhalfwayacrosstheworldtostudyinanothercountrygetusedt
[originaltext]W:Mr.Long,canyoutransfermetoanotherdepartment?M:Why?G
[originaltext]W:Mr.Long,canyoutransfermetoanotherdepartment?M:Why?G
[originaltext]W:Mr.Long,canyoutransfermetoanotherdepartment?M:Why?G
[originaltext]W:Mr.Long,canyoutransfermetoanotherdepartment?M:Why?G
随机试题
Oursenseofsmell,whichwenormallytakeforgranted,isnowadaysbeingin
InBritainandothercountries,youngpeoplesometimestakea"gapyear",a
下列词语中,加点的字读音有误的是( )。
可用分液漏斗分离的一组混合物是( )A.乙醇和水 B.乙醛和水 C.乙酸乙
男性,42岁,超声体检发现左肾内圆形肿物,边界整齐清晰,直径约1.2cm,内呈无
Ⅲ度烧伤后2~3周,焦痂自溶阶段,最好采用A.扩创手术 B.包扎手术 C.削
邓小平同志关于教育问题的论述是什么?
能温里散寒,以治疗里寒证为主要作用的药物是指A.泻下药B.安神药C.补阳药D.温
1.关爱社会需要乐于助人的精神,公司员工不仅在单位内部要做到团结、友爱,相互帮助
没有意识到或没有清楚意识到的动机是( )A.意识动机 B.外在动机 C.无
最新回复
(
0
)