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
61
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
ThefamilyisthecenterofmosttraditionalAsians’lives.Manypeoplewor
It’ssaidthemostexcitingkindofeducationisalsothemostpersonal.No
在结构的可靠度中,下列不属于结构可靠性要求的是()。A.安全性 B.适用性
目前国际上通行的与网络和信息安全有关的加密标准大致有三类,以下标准中不属于互操作
8岁女孩,因左耳垂下肿痛3天,发热伴腹痛12小时,呕吐2次入院。体检:T39℃,
可引起Ⅰ型超敏反应的是A.IgGB.IgAC.IgMD.IgEE.IgD
小儿呼吸心跳骤停的诊断依据是A.心跳呼吸停止 B.颈动脉、股动脉搏动消失 C
小学儿童的概括水平发展阶段不包括()。单选A.直观形象水平 B.初步本质
银行承兑汇票的承兑银行,应当按照票面金额向出票人收取()的手续费。A:千分之一
模拟信号放大器是完成对输入模拟量:A.幅度的放大 B.频率的放大 C.幅度和
最新回复
(
0
)