курсор стоит в начале строки.компьютер работает исправно.при попытке нажать вверх ничего не происходит - курсор наверх не перепещается.это значит ,что

20. – Выразите повествовательные предложения косвенной речью. 1. "My son is a student", said Henry. 2. "She is working at the library", said her mother. 3. My friend said to me:" I have not seen you for ages!" 4. " I shall solve the clues tomorrow," said All. 5. He said: " There is nobody here to stop them". 6. The soldier said: "We will find a place to lie up. I am afraid they will kill us". 7. My friend said to me: "We have been waiting for you for ten minutes". 8. Jane said: "I am all right. Nothing worries me". 9. "I am busy now. I am doing my lessons", said Tom. 10. "She is not here. She has just left the office", the secretary said to us. 11. He said to me: "This man is the doctor for the hospital". 12. "There is no one by that name here", they answered. 13. "I am ill. I have a high temperature", he said to us. 14. "We have tried to telephone him", they said. 15. "I don't think I will have done this work by the evening", she said.

1,15 г натрия растворили в избытке воды. объем газа (л), выделившегося в результате реакции при н.у. составляет?

y = ─ 2x + 2.

определите , проходит ли график функции через точку А (10; ─ 18).