Redirect Notice
The previous page is sending you to
https://infourok.ru/go.html?href=http%3A%2F%2Fru.wikipedia.org%2Fwiki%2F20_%28%25D1%2587%25D0%25B8%25D1%2581%25D0%25BB%25D0%25BE%29
.
If you do not want to visit that page, you can
return to the previous page
.