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
53
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
ThehomelessmakeupagrowingpercentageofAmerica’spopulation.【C1】______
Howwedie,aswellashowwelive,hasprofoundandlastingeffectson
商业银行制定服务价格,应当遵循()的原则。A.合理、公开、诚信和质价相符
巴塞尔资本协议构建了“三大支柱”的监管框架,第三支柱规定的银行信息的披露频率为(
具有止血不留瘀、化瘀不伤正特点的药物是()A.茜草 B.大蓟 C.
俄罗斯学者巴尔坎的研究表明,要读懂儿童的绘画,可以关注儿童作画的顺序、画中大小、
猪苓汤中配伍阿胶的用意是A.滋阴润燥B.滋阴止咳C.养血益气D.补血止血E.滋阴
老柯前段时间下岗后,因为没有什么技能,所以一直没能找到工作,每天待在家里,情绪特
学生的()主要指他们能运用已有知识和智能去探索、发现和掌握未知晓的知识的
正气强弱主要取决于A.气候因素 B.地域因素 C.饮食习惯 D.生活与工作
最新回复
(
0
)