首页
登录
职称英语
Why don’t birds (71) lost on their long flights from one place to another?
Why don’t birds (71) lost on their long flights from one place to another?
游客
2024-07-04
49
管理
问题
Why don’t birds (71) lost on their long flights from one place to another? Scientists have puzzled over this (72) for many years. Now they are beginning to fill (73) the blanks.
Not long ago, experiments (74) that birds rely on the sun to guide them (75) daylight, hours. But what about birds (76) fly by night? Tests with artificial stars have proved that (77) night - flying birds are able to follow the stars in their long - distance (78) A dove had spent its lifetime in a cage and had never flown under a (79) sky. Yet it showed a(n) (80) ability to use the stars for guidance. The bird’s cage was placed under a (n) (81) star - filled sky. The bird tried to fly in the position as that (82) by his outdoor cousins. Any (83) in the position of the make believe stars caused a change (84) the direction of his flight.
(85) think that doves, when flying in daylight, use the sun for (86) . But the stars are (87) their principal means of navigation. What do they do when the stars are (88) by clouds? Apparently, they find their way by such landmarks as (89) ranges, coast lines, and river courses. But when it’s too dark to see (90) , the doves circle helplessly, unable to get their bearing(方位).
选项
A、become
B、get
C、appear
D、seem
答案
B
解析
get加上过去分词具有被动含义;become加上过去分词表示一种状态。因本篇文章是探讨鸟类为何不会因东奔西走而弄错方向,B)比A)更合适。
转载请注明原文地址:https://tihaiku.com/zcyy/3662821.html
相关试题推荐
Whydon’tbirds(71)lostontheirlongflightsfromoneplacetoanother?
Whydon’tbirds(71)lostontheirlongflightsfromoneplacetoanother?
Whydon’tbirds(71)lostontheirlongflightsfromoneplacetoanother?
Whydon’tbirds(71)lostontheirlongflightsfromoneplacetoanother?
Whydon’tbirds(71)lostontheirlongflightsfromoneplacetoanother?
Whydon’tbirds(71)lostontheirlongflightsfromoneplacetoanother?
Whydon’tbirds(71)lostontheirlongflightsfromoneplacetoanother?
Whydon’tbirds(71)lostontheirlongflightsfromoneplacetoanother?
Whydon’tbirds(71)lostontheirlongflightsfromoneplacetoanother?
Allofuscommunicatewithoneanotherverbally(口头的)aswellasnon-verball
随机试题
JonasFrisenhadhiseurekamomentin1997.Backthen,scientistssuspected
[originaltext]Mostpeoplepicturesharksashuge,powerful,frighteningpre
混凝土浇筑后12h内应加以覆盖和浇水。使用硅酸盐水泥拌制的混凝土,浇水养护时间不
我国预防流行性脑脊髓膜炎主要使用的疫苗是A.接种A-C两价疫苗 B.接种B群荚
A.IgM B.IgA C.IgE D.SIgA E.IgG乳汁中富含抗
6.参与公司系统所承担电气工作的外单位或外来工作人员应熟悉本规程,经考试合格,并
某省会城市市郊铁路小镇规划人口规模5.5万人,省会城市总体规划中确定的三个铁路货
A.平均数 B.标准差 C.标准误 D.率 E.构成比某种现象发生的频率
(2021年真题)2×19年7月1日,甲公司向银行借入3000万元。借款期限2年
建设项目所在地区的主要气候特征包括( )。A.年平均风速和主导风向 B.年平
最新回复
(
0
)