1. , ... , . . . , 2. - . . ,, , 3. , , . 4. . 5. , . 6. , ,, , . , : , , , , . 7. : , , , , . 8. , , ( , ,, , ). 9. . - - , . , , , . , , , . 10. . , , , , , , , , , , , , , , . 11. , : , , . , . , , , , , , , . 12. http://school.xvatit.com/index.php?title=%D0%A5%D1%96%D0%BC%D1%96%D1%8F_%E2%80%94_%D0%BF%D1%80%D0%B8%D1%80%D0%BE%D0%B4%D0%BD%D0%B8%D1%87%D0%B0_%D0%BD%D0%B0%D1%83%D0%BA%D0%B0._%D0%A5%D1%96%D0%BC%D1%96%D1%8F_%D0%B2_%D0%BD%D0%B0%D0%B2%D0%BA%D0%BE%D0%BB%D0%B8%D1%88%D0%BD%D1%8C%D0%BE%D0%BC%D1%83_%D1%81%D0%B2%D1%96%D1%82%D1%96http://www.refine.org.ua/pageid-4596-1.htmlhttp://ua.coolreferat.com/?%D0%BF%D0%BE%D0%B8%D1%81%D0%BA=%D0%A0%D0%BE%D0%BB%D1%8C_%D1%85%D1%96%D0%BC%D1%96%D1%97_%D1%83_%D0%B6%D0%B8%D1%82%D1%82%D1%96_%D1%81%D1%83%D1%81%D0%BF%D1%96%D0%BB%D1%8C%D1%81%D1%82%D0%B2%D0%B0http://www.br.com.ua/referats/Ecologiya/4173.htmfile:///C:/DOCUME~1/02E3~1/LOCALS~1/Temp/%D0%92%D1%80%D0%B5%D0%BC%D0%B5%D0%BD%D0%BD%D0%B0%D1%8F%20%D0%BF%D0%B0%D0%BF%D0%BA%D0%B0%201%20%D0%B4%D0%BB%D1%8F%20referat-4600.zip/referat.html