| 阅读理解. |
| Have you ever wondered why birds sing?Maybe you thought that they were just happy.After all, you probably sing or whistle when you are happy. Some scientists believe that birds do sing some of the time just because they are happy.However, they sing most of the time for a very different reason.Their singing is actually a warning to other birds to stay out of their territory. Do you know what a "territory" is?A territory is an area that an animal,usually the male,claims as its own.Only he and his family are welcome there.No other families of the same species are welcome. Your yard and house are your territory where only your family and friends are welcome.If a stranger should enter your territory and threaten you,you might shout.Probably this would be enough to frighten him away. If so,you have actually scared the stranger away without having to fight him.A bird does the same thing.But he expects an outsider almost any time,especially at nesting season.So he is screaming all the time,whether he can see an outsider or not.This screaming is what we call a bird's song,and it is usually enough to keep an outsider away. Birds sing loudest in the spring when they are trying to attract a mate and warn others not to enter the territory of theirs. You can see that birds have a language all their own.Most of it has to do with attracting mates and setting up territories. |
| 1.According to the passage,most of the time birds' singing is actually . |
| A.an expression of happiness B.a way of warning C.an expression of anger D.a way of greeting |
| 2.What is a bird's "territory"? |
| A.A place where families of other species are not accepted. B.A place where a bird may shout at the top of its voice. C.An area for which birds fight against each other. D.An area which a bird considers to be its own. |
| 3.Why do birds keep on singing at nesting season? |
| A.Because they want to invite more friends. B.Because their singing helps frighten outsiders away. C.Because they want to find outsiders around. D.Because their singing helps get rid of their fears. |
| 4.How does the writer explain birds' singing? |
| A.By comparing birds with human beings. B.By reporting experiment results. C.By describing birds' daily life. D.By telling a bird's story. |
tomatoyoyo 网友
该名网友总共回答了17个问题，此问答他的回答如下：采纳率：100%
1-4:BDBA1年前他留下的回答
10以上就是小编为大家介绍的阅读理解. Have you ever wondered why bi 的全部内容，如果大家还对相关的内容感兴趣，请持续关注上海建站网！
详情：操作步骤/方法【方法1】11.慎的被动技能是施放一次技能后会......
详情：操作步骤/方法1“萝卜章”一般是指被伪造的印章，理论上，未办......
详情：操作步骤/方法1双枪2射击长程——随等级——没加满-你在好手......
详情：操作步骤/方法1UAS系统中的企业办公自动化OA系统，我们可......
本站部分内容源自互联网，如涉及版权等问题，请作者及时联系本站，我们会尽快处理。
本网站内凡注明“来源：上海建站网（http://www.lvon8.com/）”的所有文字、图片和音视频稿件均属本网站原创内容。在下载使用时必须注明“稿件来源：上海建站网（http://www.lvon8.com/）”，违者本网将依法追究责任。
上海建站网手机版
