Допишите уравнения возможных реакций и уравняйте их методом электронного баланса. а) Са + H2SO4(k) → …; в) Pb + H2SO4(p) → … ; б) Ag + H2SO4(p) → …; г) Cu + H2SO4(k) → …

cosΠ/6*cosΠ/12-sinΠ/6*sinΠ/12

– Преобразуйте предложения в косвенную речь

. 1. The passenger asked: "Where's the information desk?" 2. The teacher said to his pupils: "Turn to the first page of Unit two". 3. He asked us: "Is it all right if I open the window?" 4. I said to my friend: "I am afraid I can't come out for a sea with you". 5. She told Jack: "I will not forget to send you a telegram". 6. They asked: "How much are the tickets?" 7. He wrote in his letter: "I know you are ill and I hope you shall get better". 8. The man asked me: "Do you know what time the train gets to Sochi?" 9. Mother told Pete: "Don't forget to call me when you reach the place". 10. My friend told me: "I'll help you to do your homework if you like". 11. He asked his grandson: "Have you any idea what I did with my glasses?" 12. His granny asked him: "Don't open the window". 13. The teacher asked the boy: "Why are your hands so dirty?" 14. Father said: "Look at these clouds. It is raining soon". 15. Jack said to Sam: "Are you doing anything this evening?" 16. "I haven't learnt a poem for today", said Pete. 17. She said: "I like this song from the sixties". 18. He asked me: "Where was Richard going when you met him?" 19. My grandmother said to me: "You're grown up now". 20. "What did you do at the lesson yesterday?" said his mother. 21. "Have you paid for everything?" the security guard said to him. 22. Nellie said: "I want to keep this because it reminds me of my grandfather". 23. "We have got about twenty supermarkets in our city", the manager said. 24. My mother said: "Don't brush too much oil on the meat". 25. She said to him: "I have not spoken to you for three days". 26. "I have lost my key. I'm looking for it", said Tom. 27. "Why do you think the exam will be easy?" she asked me. 28. "How long has Ann lived in Ruzaevka?" asked he. 29. "Your English is very good", he said to me. — "You make very few mistakes". 30. "He will be away till next month", his wife said to us.

почему в слове бессонница две буквы с словообразование

1)из каких стадий состоит мейоз?

2)сколько клеток из одной образуется при мейозе?сколько в них хромосом?

 ПОМОГИТЕ!!БУДУ БЛАГОДАРНА!!