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
2024-06-06
60
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/3621680.html
相关试题推荐
[originaltext]W:Whatabeautifulday!It’sashametostayinsideallday.M:
[originaltext]W:Whatabeautifulday!It’sashametostayinsideallday.M:
[originaltext]W:Whatabeautifulday!It’sashametostayinsideallday.M:
[originaltext]Atthetheater,shedisruptsthefirstactassheclimbsover
[originaltext]Atthetheater,shedisruptsthefirstactassheclimbsover
[originaltext]Atthetheater,shedisruptsthefirstactassheclimbsover
[originaltext]Morethan50percentofallhomesintheU.S.haveonething
[originaltext]Areyouafraidtoraiseyourhandinclassevenwhenyouknow
[originaltext]Areyouafraidtoraiseyourhandinclassevenwhenyouknow
[originaltext]W:CanIhelpyou?M:Yes,I’dliketolookatsomearticlesthat
随机试题
Pronouncingalanguageisaskill.Everynormalpersonisexpertintheskil
[originaltext]M:Ifthetrafficwasn’theldupforsolong,Iwouldhavebeent
Sandy’sStoryA)Sandy,apoliteandfriendlyforty-
归纳分析法是市场调查中应用最广泛的一种方法,具体操作可以分为()A.详细归纳
A.线粒体中的三磷酸腺苷酶 B.某些含铁酶 C.某些含铜的酶 D.含硫的酶
简述《普通高中地理课程标准(实验)》的基本理念。
下列属于片剂包衣隔离层材料的是A.阿拉伯胶 B.滑石粉 C.虫蜡 D.日落
可用性是产品()的综合反映。 A.可靠性B.可信性C.维修性D.维修保
根据《公路工程地质勘察规范》(JTJ064—1998),下列关于崩塌和岩堆详勘的
下列金融资产中属于金融衍生工具的有( ).A.普通股 B.货币互换 C.公
最新回复
(
0
)