首页
登录
职称英语
[originaltext] How do the birds manage to find their way? There seems to be
[originaltext] How do the birds manage to find their way? There seems to be
游客
2023-08-03
37
管理
问题
How do the birds manage to find their way? There seems to be no single answer: they use many methods. Some we are beginning to understand; and there may be some that depend on abilities we have not yet suspected. Many birds certainly follow major geographical features. Migrants follow recognized land, fly over sea and arrive at their summer homes.
But all birds cannot use such straightforward methods. An Arctic sea bird, for example, has to fly at least 3,000 kilometers across the Antarctic Ocean with no land to guide it. We know that some birds flying at night, navigate by the stars for on cloudy nights they tend to get lost.
Day-flying birds may use the sun. If they are to do so, they must have a precise sense of time. Still others appear to be able to use the earth’s magnetic field as a guide. So it seems that many migrating birds must carry in their brains a clock, a compass and the memory of a map.
选项
A、They use many different methods.
B、All birds follow major geographical features.
C、All birds use their memory of a map.
D、We have no information about this.
答案
A
解析
How do the birds manage to find their way?
转载请注明原文地址:https://tihaiku.com/zcyy/2893206.html
相关试题推荐
[originaltext]Thehistoryofthecinemainitsfirstthirtyyearsisoneof
[originaltext]Longbeforetheycanactuallyspeak,babiespayspecialatten
[originaltext]Longbeforetheycanactuallyspeak,babiespayspecialatten
[originaltext]Longbeforetheycanactuallyspeak,babiespayspecialatten
[originaltext]Moderator:Goodevening,ladiesandgentleman.Todaywea
[originaltext]Moderator:Goodevening,ladiesandgentleman.Todaywea
[originaltext]Lastsummer,mywifeandIhadsavedforayeartobeableto
[originaltext]Lastsummer,mywifeandIhadsavedforayeartobeableto
[originaltext]VaukindeSilvaisaBrazilianwholivesandworksinNewYor
[originaltext]W:Whatdoestheterm"alternativeenergysource"mean?M:Whenw
随机试题
Underexistinglaw,anewdrugmaybelabeled,promoted,andadvertisedonly
MembershipinlaborunionsintheUnitedStatesreacheditspeakof17millions
Howcouldsoftwareerrorspossiblyaffectsuchabasicandwell-understoodfinan
Researchersareincreasinglyinterestedinmanipulatingtheenvironmentearl
【题目来源】5月19日上午河南省郑州市结构化面试考题 【考题二回顾】有的
下列激素中与调节血钙有关的是()A.甲状腺激素 B.甲状旁腺激素 C.降钙
两个声音传至人耳的时间差为多少毫秒(ms)时,人们就会分辨出他们是断续的?(
不属于糖蛋白的蛋白质是 A.清蛋白B.α1球蛋白C.α2球蛋白D.
增液口服液主治高热后,阴津亏损所致的便秘,其既能增液润燥,又能A.清热泻火 B
根据公司法律制度的规定,下列选项中,国有独资公司的董事会有权决定的事项是( )。
最新回复
(
0
)