Вопрос по химии:

Число недостающих до завершения внешнего энергетического уровня электронов у атомов элементов:H

Вопрос по алгебре:

Вопрос по английскому языку:

Change from the active into the passive. Mind the place of a preposition in a passive sentence: We often speak about her. — She is often spoken about.

1. The committee will speak to you tomorrow. 2. We thought about our loss all the time. 3. The surgeon will operate on my Mum tomorrow. 4. Nobody has slept in the bed for a long time. 5. We finally arrived at the decision. 6. The coach sent for the young sportsman's parents. 7. You may start. Everybody is listening you with great attention. 8. The senior students laughed at the fresh- man. 9. The groupmates were talking to the new student in a friendly manner. 10. This nurse is looking after the patients with great care. 11. Nobody has lived in that old house for years. 12. The director sent for the manager and told him to prepare a report on that matter. 13. Everyone looked at her with interest when she appeared at the party. 14. Nobody took any notice of then when they came.15. We lost sight of the ship very soon. 16. I can’t put up with her rude- ness. 17. I’ve been looking for you everywhere. 18. I don’t like when people interfere with me.19. This can account for his poor health. 20. You can rely on me.

Вопрос по алгебре:

Вопрос по биологии: