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
52
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、Cries of birds are affected by seasons.
B、Only some sorts of birds can cry.
C、Birds would cry when they meet dangers.
D、It is easy to tell the singing of a bird from its crying.
答案
C
解析
转载请注明原文地址:http://tihaiku.com/zcyy/3005415.html
相关试题推荐
[originaltext]M:TellmeaboutyourtriptoParis.W:Well,wewalkedalot,vi
[originaltext]M:TellmeaboutyourtriptoParis.W:Well,wewalkedalot,vi
[originaltext]M:TellmeaboutyourtriptoParis.W:Well,wewalkedalot,vi
[originaltext]M:TellmeaboutyourtriptoParis.W:Well,wewalkedalot,vi
[originaltext]M:TellmeaboutyourtriptoParis.W:Well,wewalkedalot,vi
[originaltext]Somepeoplehaveverygoodmemories,andcaneasilylearnquit
[originaltext]Somepeoplehaveverygoodmemories,andcaneasilylearnquit
[originaltext]Somepeoplehaveverygoodmemories,andcaneasilylearnquit
[originaltext]Lastsummer,ItookmyfirstflightfromLondontoNewYork.I
[originaltext]Lastsummer,ItookmyfirstflightfromLondontoNewYork.I
随机试题
Thisticket______youtoseeafreeoperaatthenewtheatre.A、givesB、grantsC、
本题中正确的选项是()。A.每个防火分区应至少设置两只手动火灾报警按钮 B
在变电所二次回路或照明回路上工作,不需要将高压设备停电者或作安全措施者,应执行(
关于场地管线布置,下列说法不正确的是( )。A.地下管线布置,宜按管线敷设深度
检验检测机构的技术管理者可以是一人,也可以是多人,以覆盖检验检测机构不同的技术活
保险资金可以设立( ),范围包括成长基金、并购基金、新兴战略产业基金、夹层基金
国际友人对我国某慈善机构的外汇捐赠应记入国际收支的()。A.经常项目 B.资
监理工程师在工程设计准备阶段进度控制的任务是( )。A.编制详细的出图计划 B
下列管道坡度,符合冷凝水排水管坡度的是( )。A.4‰ B.5‰ C.6‰
肾盂结石1.2cm,IVP右肾功能正常,轻度积水,输尿管通畅,首选的治疗方法是A
最新回复
(
0
)