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
2024-07-02
13
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/3658882.html
相关试题推荐
Someanimals______wellenoughinthatcountry.A、havenotprotectedB、isnotbe
Doyouknowwhydifferentanimalsorpestshavetheirspecialcolors?Colors
Doyouknowwhydifferentanimalsorpestshavetheirspecialcolors?Colors
ThefarmersinChinadon’tuseanimals(do)______farmworkanymore.todo本题考查固
Methodsoftraininganimalshavechangedgreatlyinrecentyears.Zookeeper
Methodsoftraininganimalshavechangedgreatlyinrecentyears.Zookeeper
Methodsoftraininganimalshavechangedgreatlyinrecentyears.Zookeeper
Ifwe______moretimeandmoney,wecouldhavevisitedmanymoreplaces.A、have
Birdsarewarm-blooded,vertebrateanimalswhosebodiesarecoveredwithfeat
Birdsarewarm-blooded,vertebrateanimalswhosebodiesarecoveredwithfea
随机试题
[audioFiles]audio_eufm_j62_001(20082)[/audioFiles]A、Mr.Johnisverykind.B、Th
Paststudieshavesuggestedtheamygdale(扁桃体)isimportantin(26)______respon
支付宝(Alipay)是中国最大的第三方在线支付平台,由阿里巴巴集团(AlibabaGroup)于2004年创建。截至2012年底,支付宝拥有用户超过
某工程包括A、B、C、D、E、F六个作业,分别需要5、7、3、4、15、1
A.灌注压突破 B.皮毛窦 C.内听道扩大及早期耳聋、耳鸣 D.咖啡样色素
下列各项中,不符合内部牵制的要求的是()。A、出纳人员管票据 B、出纳人员
收敛固涩宜煅用,可以治疗胃痛泛酸的中药是A.天麻 B.牡蛎 C.石决明 D
充血性心力衰竭和水钠潴留的病人,禁用以下哪种溶液灌肠A、0.9%氯化钠溶液 B
行政手段是我国证券市场监管的主要手段,其约束力强。()
某简支空心板梁桥桥面标高21.75m,板厚60cm,桥面铺装厚12cm,设计洪水
最新回复
(
0
)