исполнители. разнообразие исполнителей доклад

вот http://school.xvatit.com/index.php?title=%D0%98%D1%81%D0%BF%D0%BE%D0%BB%D0%BD%D0%B8%D1%82%D0%B5%D0%B...

http://school.xvatit.com/index.php?title=%D0%98%D1%81%D0%BF%D0%BE%D0%BB%D0%BD%D0%B8%D1%82%D0%B5%D0%BB%D0%B8_%D0%B2%D0%BE%D0%BA%D1%80%D1%83%D0%B3_%D0%BD%D0%B0%D1%81