His i____ is approximately 8000 dollars a month.
洗雪百年国耻,标志我国在完成祖国统一大业道路上迈出重要一步的事件是( )
等差数列an和bn的前n项和分别为Sn和Tn,且SnTn=2n3n+1,则a5b5=( )