(2015•东营)分解因式:4+12(x﹣y)+9(x﹣y)2=____
在世界现存的6000多种语言中,超过1000种语言处于极度濒危或严重濒危状态。为保护语言文化的多样性,联合国教科文组织将每年的2月24日定为“国际母语日”。对此,下列认识错误的是( )
I have two sisters. They are _______.
The fact that lets artists down is that Peking Opera, a 200-year-old art form, is losing popularity.