首页
登录
职称英语
When animals make long journeys across places where there is no food or shel
When animals make long journeys across places where there is no food or shel
游客
2023-09-24
37
管理
问题
When animals make long journeys across places where there is no food or shelter, such as deserts or oceans, it is very important that they should be able to find their way accurately.
Birds find their way by the stars at night and by the sun during the day. People thought that this was impossible. Then some scientists made an experiment. They put some migrating birds(候鸟)in cages inside a planetarium(天象图). When the operator turned the artificial sky(人造天空)round, the birds began to fly to the sides of the cage. Every time he moved it, the birds moved to a new position. Scientists discovered that they always flew toward the direction in which they would have flown if the sky had been real. This proved that they could see the stars and respond to them.
Many animals, especially birds, have a very precise sense of time, which is called their “internal clock”. In cloudy weather, birds delay setting off on long journeys, but if the cloud lasts for a long time, they must go at last, to complete their migration in time. In such conditions, they are able to steer(引导)by following the magnetic field(磁场)of the earth. We could say that they have their own special compass inside them, which tells the right direction to go.
Most migrating animals travel in groups, sometimes in very large numbers. This makes it more likely that they will find the right way, especially when the group has experienced animals which have made the journey before. [br] How do most migrating animals travel?
选项
A、They travel together in large numbers.
B、They travel independently.
C、They travel on daytime.
D、They travel with those who have made the journey before.
答案
A
解析
细节题。根据最后一段第一句Most migrating animals travel in groups, sometimes in very large numbers. 可知, 很多迁徙动物是以群体的形式迁徙的, 故选A。
转载请注明原文地址:https://tihaiku.com/zcyy/3042618.html
相关试题推荐
Whileotheranimalsusealimitedrangeofsoundsorsignalstocommunicate,
Hehadmoralobjectionsto(kill)______animalsforfood.killing本题考查介词后接动名词的用法。o
(Give)______betterattentioninthecoldweather,thoseanimalscouldhaveavo
[originaltext]Whatdidthepeopleincoldplacesdotopreservetilemeat?[/ori
FlyingacrosstheAtlanticforthefirsttimewasagreat(achieve)______.achi
Doyouknowwhydifferentanimalsorpestshavetheirspecialcolors?Colors
Doyouknowwhydifferentanimalsorpestshavetheirspecialcolors?Colors
Doyouknowwhydifferentanimalsorpestshavetheirspecialcolors?Colors
Indangerousplaces,you______takecareofyourchild.A、canB、mayC、mustD、wil
ThefarmersinChinadon’tuseanimals(do)______farmworkanymore.todo本题考查固
随机试题
Asregardssocialconventions,wemustsayawordaboutthewell-knownEngli
[originaltext]W:Hi,Mr.JohnsoaWhendoyouusuallygetup?M:[8]Iusuallyge
A.Ⅰ、Ⅲ B.Ⅱ、Ⅲ C.Ⅰ、Ⅳ D.Ⅱ、Ⅳ
检验经纬仪水准管轴是否垂直于竖轴,当气泡居中后,平转180°时,气泡已偏离。此
下列说法哪种是错误的?()A.萎缩是指实质细胞、组织或器官的体积缩小 B.肥
萘普生与下列哪个药同属于一类非甾体抗炎药A.保泰松B.吲哚美辛C.布洛芬D.美洛
油浸电压互感器二次接线盒()属于一般缺陷。(A)密封不良(B)内部受
2×20年7月1日,甲公司以银行存款2000万元取得乙公司20%的股权投资,能够
下列流水施工参数中,用来表达流水施工在空间布置上开展状态的参数是( )。A.施
下列不属于肾前性少尿的病因的是A、心脏搏出量不足 B、肾动脉收缩 C、肾脏大
最新回复
(
0
)