Предмет: Окружающий мир, автор: CatMeow2012

Какие бывают вещества и материалы? Привиди примеры
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Ответы

Автор ответа: helen1503
0
Горючие вещества и материалы

вещества и материалы, способные самовозгораться, а также возгораться при воздействии источника зажигания и самостоятельно гореть после его удаления.
не уверена, что правильно


CatMeow2012: какие есть вещества и материалы
helen1503: Горючие : древесина, целлюлоза, пластмасса, битум 
Трудногорючие : древесно-стружечная и древесно-волокнистая плиты 
Негорючие : кирпич, металл, гипс, гранит, мрамор
CatMeow2012: большое спасибо
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Упражнение 202
Раскройте скобки, употребляя глаголы в одном из следующих времен: Present Continuous, Present Simple, Past Simple или Future Simple.
1. I (to think) Nellie (to leave) for Moscow tomorrow. 2. I (to be) in a hurry. My friends (to wait) for го me. 3. You (to be) at the theatre yesterday. You (to like) the opera? - Oh yes, I (to enjoy) it greatly.
4. We (to expect) you (to go) to Londonext summer. 5. Her English (not to be) excellent, but she (to work) at it. 6. A week ago they (not to know) what to think. 7. She (to worry) a lot at the moment, but the problems (not to be) very great. 8. Last Tuesday he (to be) upset and (to have) no idea where to go.
9. Could you tell me the way to Trafalgar Square? I (to go) the right way? 10. Various kinds of sports (to be) popular in Russia. 11. Both children and grown-ups (to be) fond of sports. 12. What (to be) the matter with her? She (to be) so excited. - I (not to know). 13. Where you (to go)? -- I (to go) to the stadium to see the match which (to take) place there today. 14. You (to know) that a very interesting match (to take) place last Sunday? 15. He (to go) to the south a week ago. 16. When I (to be) about fifteen years old, I (to enjoy) playing football. 17. Our football team (to win) many games last year. 18. Where (to be) Boris? -- He (to play) chess with his friend.
19. I (to be) sorry I (to miss) the match yesterday. But I (to know) the score. It (to be) 4 to 2 in favour of the Russian team.