Укажите последовательность химических элементов, состоящую только из элементов больших периодов.



Кремний, кальций, бром



Кислород, сера, селен



Кальций, мышьяк, свинец, ксенон



Цинк, бериллий, бор



Калий, натрий, железо

They shared the car to the city. " We(1. go) the theatre after dinner," Mrs. Elliot said. " I (2. look) forward to it. I (3. not\ be) to the theatre for this weeks. There (4. be) such an exciting atmosphere in the theatre, don't agree? You (5. visit) the theatre often in London, dear"? " Quite often", Sara agreed. "I (6. enjoy) it, too," " Is this friend of yours a close friend?" Mrs. Elliot asked. Sara hesitated. "I (7. see) quite a lot af him lately, she admirtted. The cas (8. stop) at the hotel and Sara (9. go) out. Perry ( 10.wait) for her in the entrence hall. She (11.decide) to tell him everything after they (12. eat)

дано: sin a = -0.6;       П < a < 3П/2 

Найти:

а) cos a; 

б) tg a;

в) ctg a;

г) cos (П/3 - а) 

Помогите пожалйста написать диалог на тему:

 "диалог , который мог бы быть между випускником и учителем через 10-15 лет"