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
2024-02-25
39
管理
问题
How do the birds manage to find their way? There seems to be no single answer: (32)they use many methods. Some we are beginning to understand; and there may be some that depend on abilities we have not yet suspected. (33) Many birds certainly follow major geographical features. Migrants follow recognized land, fly over familiar 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, (34) navigate by the star for on cloudy nights they tend to get lost.
Day-flying birds may use the sun. If they are to do so, they must (35) 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 a map and the memory of location.
B、They use the sun and the stars.
C、They use a map and the earth’s magnetic field.
D、They have precise sense of time or may use the earth’s magnetic field.
答案
D
解析
此题的问题是:"How do day-flying birds find their way?"根据"day-flying"可排除B项。整篇文章讲的是鸟如何确定飞行方向,找到迁徙的正确路线。而鸟是不可能用地图的,文中的"the memory of a map"指的是对地貌的记忆,而非真的地图。只有D项最符合要求。"Day-flying birds may use the sun. If they do so, they must have a precise sense of time. Still others appear to be able to use the earth’s magnetic field"。
转载请注明原文地址:https://tihaiku.com/zcyy/3482505.html
相关试题推荐
[originaltext]Doyouhavetroublesleepingatnight?Thenmaybethisisfor
[originaltext]Doyouhavetroublesleepingatnight?Thenmaybethisisfor
[originaltext]W:WhatdoyouthinkIshouldweartothepartytonight?M:Oh,I
[originaltext]W:WhatdoyouthinkIshouldweartothepartytonight?M:Oh,I
[originaltext]W:WhatdoyouthinkIshouldweartothepartytonight?M:Oh,I
[originaltext]W:WhatdoyouthinkIshouldweartothepartytonight?M:Oh,I
[originaltext]W:WhatdoyouthinkIshouldweartothepartytonight?M:Oh,I
[originaltext]Mostantsarehardworkersandoftenworkfromsixo’clockin
[originaltext]Mostantsarehardworkersandoftenworkfromsixo’clockin
[originaltext]W:Dr.Gary’sOffice.M:Yes,I’dliketomakeanappointmentto
随机试题
Whatdoconsumersreallywant?That’saquestionmarketresearcherswouldlo
[originaltext]Digitaltextbooksarechangingthewaymanystudentslearn.Al
Patientstendtofeelindignantandinsultedifthephysiciantellsthemhec
Inadditiontotheiracademicwork,childrenintheUnitedStatesareoffere
物理安全是整个信息系统安全的前提,以下安全防护措施中不属于物理安全范畴的是()A
5、某在用隧道,其养护等级为二级。经常性检查中发现存在多处衬砌开裂和渗漏水,路面
公允价值的计量方式包括( )。A.直接使用可获得的市场价格 B.如不能获得市
乳剂分散相与连续相存在密度差,放置时分散相集中在顶部或底部,称为()。A.絮凝
治疗暴发性溃疡性结肠炎的首选方法为A.大剂量抗胆碱药物 B.水杨酸偶氮磺胺吡啶
某建设工程项目施工过程中发生不可抗力事件,建筑物受损严重,部分施工机具损毁,施工
最新回复
(
0
)