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
70
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、To fly one following another.
B、To fly without stopping.
C、To use land features as the guide.
D、To take one route only.
答案
C
解析
What is the most straightforward method for the birds to use to find their way?
转载请注明原文地址:https://www.tihaiku.com/zcyy/2893207.html
相关试题推荐
[originaltext]M:Mary,youareintodrama,soIthoughtwewouldtalkaboutSha
[originaltext]M:Mary,youareintodrama,soIthoughtwewouldtalkaboutSha
[originaltext]W:Youknow,forme,EcuadorandColombiaseemtobethesame.Ca
[originaltext]W:Youknow,forme,EcuadorandColombiaseemtobethesame.Ca
[originaltext]Smartphonesdistractattentionandreducelearningbecauseof
[originaltext]Smartphonesdistractattentionandreducelearningbecauseof
[originaltext]Smartphonesdistractattentionandreducelearningbecauseof
[originaltext]Goodafternoon.Intoday’slecture,we’llbetalkingaboutho
[originaltext]Goodafternoon.Intoday’slecture,we’llbetalkingaboutho
[originaltext]InAmerica,mostresearchersconcedethatboysandgirlsare
随机试题
[img]2012q2/ct_epej_epelist_0076_20124[/img][br][originaltext]Excuseme.Can
Whatarethechallengesfacingmultinationalsthatwanttobuildtheirbrand
Peoplewhoaretoohappydieyoungerthantheirmoredownbeatpeers,claims
A.local B.outside C.middle D.arounD.
自动弯沉仪测定路面弯沉试验方法中,在测试路段前20m处将测量架放落在路面上,并检
下列哪项不属于外科感染的特点()A.多为混合感染 B.局部病变基础上可引
教学过程是一种特殊的认识过程,主要以传授( )。A.直接经验为主 B.间接经
一胃病患者,食后脘腹胀满、朝食暮吐,暮食朝吐,吐出宿食不化,吐后即觉舒适,神疲乏
碳酸钙是珍珠的主要成分,占珍珠比例的百分之九十。但是,想用皮肤来吸收碳酸钙,这几
外地来打工的陈某向工作所在地教育行政部门申请,请求批准他年满7周岁的孩子晓宣在工
最新回复
(
0
)