题目

Have you ever wondered why birds sing? Maybe you thought that they were just happy. After all, you probably sing 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 (警告) 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 (声称) as its own. Only he and his family are welcome there. No other families of the same species are welcome. Your 被鲁迅誉为“史家之绝唱，无韵之离骚”的史书的作者是A.司马炎B.司马迁C.司马昭D.司马光