?????? 1. ???? ???? ?? ????? ????? ??? ???? ??? ??? ?? ?? ? ????. ??? ???? ?? ??? ??? ?????: 1??? (??): ? fifty,000? ~ 70,000? three??? (??): ? a hundred thirty,000? ~ 180,000? six??? (?? ???): ? 250,000? ~ three hundred,000? ??? ?? ? ???? ?? ??? ??? ??? ? ??, ?? ??? ???? ??? ?????