2,7-одна девятая (дробью) =

Маша: «Мне вместе с Наташей 21 год», Наташа: «Я моложе Тамары на 4 года», Тамара: «Нам всем вместе 34 года». Сколько лет каждой девочке?

Say what you think these people are going to do.

1. Peter is in the bathroom. The water is running.

2. Alice is in the kitchen. A cup of coffe and a sandwich are on the table.

3. Paul is sitting in the armchair. He is opening a book.

4. Anna is in the shop. She likes a large beautiful mirror.

5. John and Jane are wearing tennis clothes and they have their tennis rackets in their hands.

6. Frank is standing near the bookcase with a book in his hand. His other hand is on the bookcase door.

7. Mother is in the kitchen. In the sink there are a lot of cups and glasse which are a not clean. The water is running.

8. Some boys and girls are one of them has a football.

3. Не является окислительным процессом:

а) дыхание;          б) взаимодействие СuО и Н2;     в) горение;        г) гниение.

4. По какой реакции нельзя получить кислород?

а) СаСО3    →                      б) Н2О→