al(oh)2+ кислота=

al(oh)2+ щелочь=

Упр. 303. Передайте следующие общие воп­росы в косвенной речи. 1. I said to Boris: "Does your friend live in Lon­don?" 2. I said to the man: "Are you living in a hotel?" 3. Nick said to his friend: "Will you stay at the 'Hilton'?" 4. He said to me: "Do you often go to see your friends?" 5. He said to me "Will you see your friends before you leave St. Petersburg?" 6. Mike said to Jane: "Will you come to the rail­way station to see me off?" 7. She said to me: "Have you sent them a telegram?" 8. She said to me: "Did you send them a telegram yesterday?" 9. I said to Mike: "Have you packed your suit­case?" 10. I said to Kate: "Did anybody meet you at the station?" 11. I said to her: "Can you give me their address?" 12. I asked Tom: "Have you had breakfast?" 13. I asked my sister: "Will you stay at home or go for a walk after dinner?" 14. I said to my mother: "Did anybody come to see me?" 15. I asked my sister: "Will Nick call for you on the way to school?" 16. She said to the young man: "Can you call a taxi for me?" 17. Mary said to Peter: "Have you shown your photo to Dick?" 18. Oleg said to me: "Will you come here tomor­row?" 19. He said to us: "Did you go to the museum this morning?"

1.С чем взаимодействует металлический натрий при образовании 2,3-диметилбутана? 2.По радикальному механизму происходит взаимодействие: 1.этилена и воды 2.этана и хлора 3.этилена и хлороводорода 4.этина и бромоводорода.

Плесневелые грибы человек использует с целью 
1)изготовление йогуртов
2)получение некоторых сыров
3)силосования кормов
4)приготовления теста  

Составьте с возвратными деепричастиями несовершённого вида словосочетания по схеме нареч + деепричастие (к наречию задаётся вопрос)