____ He's my brother.
____ Who's that boy?
____ Yes, she is.
____ Is she your mother?
____ No, he isn't. He's my teacher.
____ Is he your father?
士人阶层中的知识分子在中国古代政治生活中扮演着重要角色。下列有关士人阶层的说法,正确的是( )
下列各句中,没有错别字的一项是( )