Предмет: Математика, автор: Алина1234657890

все государства расположены на некоторой планете установили между собой дипломатические отношения сколько государств на этой планете если всего было образовано 1) 12 пословиц 2) 210 посольств

Ответы

Автор ответа: Змеягогорна
0


1). Каждое государство создало по 1 посольству, в других государствах, кроме своего. 4 государства по 3 посольства. Всего 12 посольств : 3 посольства созданных каждым государством = 4 государства. 2). Разница между государствами и посольствами, созданными каждой страной 1 (посольств меньше на 1). Извлечение корня из общего количества посольств даст среднее между ними. √210 =14,49. Значит по 14 посольств у каждого из 15 государств. Проверка: 15 * 14= 210 посольств. 
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Упражнение 5. Сделайте предложения отрицательными.
Ex.: It is a dog. It isn't a dog.
1. This is a dragon-fly.
2. I am a shop assistant.
3. Den is from Germany.
4. It is a wall.
5. Our sisters are doctors. ·.
6. His uncle is forty-five. ·
7. Tom and Jane are from Austria.

Упражнение 6. Сделайте предложения вопросительными.
Ex.: They are from Japan. Are they from Japan?
1. John is a tall boy. -
2. They are young women. 3. You are happy.
4. She is a good doctor.
5. They are big black bears. 6. I am at home.
7. It is a bottle of milk.
8. His parrot is in the room.

Упражнение 7. Раскройте скобки, прочитайте текст и ответьте на вопросы.
My name (to be) Pam. I (to be) from Holland. I (to be)ten. I have got a family. We (to be) a family of six. I. have got a mother, a father, two brothers and a sister. My brothers' names (to be) Sam and Den. They (to be) twins. They (to be) seven. I (to be) a pupil. My brothers (to be) pupils, too. My sister's name (to be) Abby.-She (to be) four. Abby (not to be) a pupil. 1·1ove my family.
1. What is the girl's name? 2. Where is she from?
3. How old is she?
4. Is she a pupil?
5. What are her brothers' names? 6. How old are they?
7. Are they pupils?
8. What is Pam's sister's name? 9. How old is Abby?
10. Is she a pupil?

Упражнение 8. Раскройте скобки, ответьте на вопросы, используя слова в скобках после вопроса.
1. They (to be) from Italy or Greece? (Portugal)

2. What her nephews (to be)? (drivers)
3. What his daughter (to be)? (an actress)
4. How old his parents (to be)? (31, 35)
5. What it (to be)? (a caterpillar)
6. What those men (to be)? (cosmonauts)
7. Where your stepmother (to be) from? (America) 8. How old your sons (to be)? (10, 3)
9. What it (to be)? (a kangaroo)
10. Where his grandmother (to be) from? (Finland)

Упражнение 9. Раскройте скобки.
1. My sister (to be) a doctor.
2. His parents (to be) engineers.
3. I (to be) a student.
4. My shoes (to be) very dirty.
5. Her bed (not to be) comfortable.
6. Your book (to be) in your bed.
7. I (not to be) happy today.
8. The shops (to be) open· today.
9. Mr. Kelly's son (to be) eight years old.
10. Mr. Smith's children (to be) ten years old.