首页
登录
职称英语
[originaltext] The sound of birds can be divided into 3 types including sing
[originaltext] The sound of birds can be divided into 3 types including sing
游客
2023-09-11
35
管理
问题
The sound of birds can be divided into 3 types including singing, crying and voice imitating. Singing is normally a continuous multi-syllable melody uttered by the birds under the control of sex hormone. Some sorts of singing are quite melodious and pleasant. During the breeding cycle, the changing and pleasant cries uttered by male birds are typical singings. Singing is an important way for a bird to defend its territories, to pronounce it has occupied a place and to warn other birds not to enter the area. The songs uttered by birds in singing are more different and complicated than their common cries, which mainly happen in the breeding cycle in spring and summer. Cries are not controlled by sex hormone and can be uttered by both male and female birds. Usually cries of birds are short and simple. But the cries of birds can mean a lot. They are used to communicate with one another and to inform one another about dangerous information. The cries of birds can express calling, warning, surprising and threatening. Sometimes it is very difficult to distinguish crying and singing. Generally speaking, cries are not affected by the change of seasons and can be uttered by all birds; Crying is an important way for birds to communicate with one another. Voice imitating means a bird is imitating the crying or voice of other birds. The biological meaning of voice imitating is not clear even now and it is highly probable that it will take a long time for people to discover the mystery.
选项
A、To defend its territories.
B、To attract the attention of other birds.
C、To warn other birds.
D、To pronounce that it has occupied the place.
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3005414.html
相关试题推荐
[originaltext]Theworld’sfirstcompletelyautomaticrailwayhasbeenbuilt
[originaltext]Theworld’sfirstcompletelyautomaticrailwayhasbeenbuilt
[originaltext]Theworld’sfirstcompletelyautomaticrailwayhasbeenbuilt
[originaltext]Afableisashortstorywhichisnottrue.Itisastorytha
[originaltext]Afableisashortstorywhichisnottrue.Itisastorytha
[originaltext]M:Hey!Jenny,doyouwanttolivealongerlife?W:Why?Ofcour
[originaltext]M:Hello.W:Hello,Sam.ThisisPaulaHanson.Sorrytobotheryo
[originaltext]M:Hello.W:Hello,Sam.ThisisPaulaHanson.Sorrytobotheryo
[originaltext]M:Hello.W:Hello,Sam.ThisisPaulaHanson.Sorrytobotheryo
[originaltext]W:Hi,Bob.IheardaboutyouraccidentbutIdidn’tthinkitwou
随机试题
Schoolshootingsareinthenewsagain.AnOhioteenageropenedfireonfive
Accordingtotheauthor,allof-thefollowingevidencerelatingtothefirstbi
Likeplantsthatjostleforabareminimumofsoilandlight,humanbeingswould
Thelatestgloomynewsfromjournalism’sbatteredfrontlinesisthatthepr
Inthelasthalfofthenineteenthcentury"capital"and"labour"wereenlar
某税务师于2019年12月对企业2019年的纳税情况进行审核时发现,2019年6
郄穴共有多少个?( )A.16个 B.14个 C.12个 D.18个
病残旅客乘机,如申请担架服务,需于航班起飞前()小时向承运人当地营业部提出
各种运输方式内外部的各个方面的构成和联系,就是( )。 A.运输系统
理财策略在()情形下应增加股票配置。A:预期未来利率水平上升B:预期未来利率水
最新回复
(
0
)