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
16
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、accepted
B、followed
C、taken
D、directed
答案
C
解析
taken应来自“take the course of..”。
转载请注明原文地址:https://tihaiku.com/zcyy/3046570.html
相关试题推荐
WhenevertravelingonShanghaiAirlines(SAL)flightswithpaidtickets,you
Aninsectisnotafraidofgravity,butitisindeadlyfearofanotherforce
Thereisanotherproblem______(discuss)inthenextmeeting.tobediscussed非谓语
Koalas(考拉熊)usearangeofsoundstocommunicatewithoneanother______relativ
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
AnothervirtueAmericansrespectisperseverance.RememberAesop’sfableabou
Faces,likefingerprints,arenotthesameasoneanother.Didyoueverwond
随机试题
Whoarethespeakers?[originaltext]M:Wouldyouliketogotothecampusconcer
TheInternet,e-commerceandglobalizationaremakinganeweconomicerapos
温周期现象
根据工程的实物量和定额标准分析劳动需用总工日,确定生产工人、工程技术人员的数量和
26岁,结婚2年不孕。妇科检查:宫颈光滑,子宫如孕3个月大小,质硬,凹凸不平,触
不属于肾阳虚证的临床表现的是A.形寒肢冷B.遗精早泄C.五更泄泻D.五心烦热E.
2020年,全年货物进出口总额321557亿元,比上年增长1.9%。其中,出口1
下列关于商业银行借记卡的使用,表述正确的是( )。A.借记卡具有透支功能 B
A经济技术开发区内某保税集团开展来料加工业务,应自料件进口之日起1年内加工成品出
对工程质量状况和质量问题,按总包、专业分包和劳务分包分门别类地进行调查和分析,以
最新回复
(
0
)