①意在改革与完善我国民族区域自治制度

②是加强民族团结，实现各民族共同繁荣的要求

③是消除各民族之间差别的有效途径

④体现了社会主义公平正义、共同富裕的追求

历史上第二次生产力的发展改变了人口增长模式，具体表现为（    ）

阅读下列短文，从每题所给的A、B、C和D项中，选出最佳选项。

                                                                              Musicians wanted

      We want four good musicians for our rock band(摇滚乐队). Are you a musician? Can you sing? Can you play the piano, the guitar or the drums? Do you want to be the best musician? If you want to join us, please send(发送) an e-mail. Our e-mail address is rockband2009 @pep.com.cn. Or you can call Mr. Liu at 790-4566.

                                                                             Teachers needed

      Are you an art te acher? Can you paint (绘画) or draw well? Are you good with kids? We need two teachers for our art club. Please find Mrs Wang for more information(信息) or call 628-1183.