На одной из станций поезд задержался на 2 часа. на скольконужно увеличитьпоезду скорость, чтобы прибыть на следующую станцию , находящуюся на расстоянии 40 км , вовремя
1. Bob bought the car from the man who was the owner of the gallery.
- In this sentence, we use the relative pronoun "who" to refer to the man, connecting the two sentences and providing additional information about him.
2. The teacher asked me a question that was taken from a story book.
- Here, we use the relative pronoun "that" to connect the two sentences and identify the question as being from a story book.
3. Have you employed the man to whom I recommended last week?
- In this sentence, we use the relative pronoun "whom" to refer to the man, connecting the two sentences and indicating that the recommendation was made last week.
4. The book, which I borrowed from the library yesterday, was very interesting.
- We use the relative pronoun "which" to connect the two sentences and provide additional information about the book being borrowed from the library yesterday.
5. The girls whom we saw at the cinema are my classmates.
- Here, we use the relative pronoun "whom" to refer to the girls, connecting the two sentences and indicating that they are my classmates.
6. Alex took the gun out of his pocket when he saw the robbers running down the street.
- In this sentence, we use the conjunction "when" to connect the two sentences and indicate that Alex took the gun out of his pocket at the moment he saw the robbers running down the street.
7. The students who came to class late missed the quiz.
- Here, we use the relative pronoun "who" to refer to the students, connecting the two sentences and indicating that they came to class late and as a result, missed the quiz.
8. The flowers that I picked up this morning are still fresh.
- We use the relative pronoun "that" to connect the two sentences and provide additional information about the flowers being picked up this morning.
9. There was a garden here which used to be full of green trees, but now there are only two trees.
- In this sentence, we use the relative clause "which used to be full of green trees" to provide additional information about the garden that was present in the past but now only has two trees.
10. They broke the vase while they were playing basketball at home.
- Here, we use the conjunction "while" to connect the two sentences and indicate that the vase was broken during the time they were playing basketball at home.
11. Gerry works for a company that makes typewriters.
- In this sentence, we use the relative pronoun "that" to connect the two sentences and provide additional information about the company that Gerry works for.
12. This is Mrs. Green, whose daughter got married to a drummer.
- Here, we use the relative pronoun "whose" to connect the two sentences and provide additional information about Mrs. Green, indicating that her daughter got married to a drummer.
13. That man, whose name I forgot, is an artist.
- In this sentence, we use the relative pronoun "whose" to connect the two sentences and provide additional information about the man, indicating that I forgot his name.
Workbook sentences:
1. We have a neighbor whose dog barks a lot.
2. I don’t know most of the people whom you invited for the party.
3. My cousin is a journalist whose job is interesting.
4. That’s the parcel that came in the mail.
5. Do you know the man to whom I asked the address?
6. The boy who is the travel agent is checking the tickets.
7. The gardener’s wife, who has been married for six years, has just had her third baby.
8. The horse that came in last is the one you were telling me about.
9. I can’t remember the town where I was born.
10. I apologized to the woman whose coffee I spilt.
11. Did you mail the letters that were on my table?
12. The man who teaches at the university is the same person whose daughter you met last night.
13. We’re studying science, which helps us to find out a lot about the world around us.
14. The man who left a big tip for the waiter was very rich.
15. The subject that you wrote about last week interested everyone.
16. Mrs. Fox belongs to an organization that assists hospitals.
17. You should go to Dr. Anderson, who will give you a common exam.
18. We met a girl whose name was unusual.
19. The story that he told to us can’t possibly be true.
20. Did you buy the dress that was very smart and expensive?
21. That’s the dog that can understand everything.
Чтобы решить эту задачу, давайте разберемся в правилах игры и определим стратегии для обоих игроков.
Правила игры:
- Игра происходит на полоске, состоящей из 20 клеточек.
- На крайних клеточках находятся белая и черная шашки.
- Игроки по очереди передвигают свою шашку на 1 или 2 клетки влево или вправо, если это возможно.
- Нельзя перепрыгивать через шашку.
- Проигрывает тот, кто не может двигаться своей шашкой.
При рассмотрении такого рода задач часто полезно посмотреть на некоторые примеры и попытаться увидеть закономерность.
Давайте рассмотрим несколько начальных положений шашек на полоске, чтобы найти закономерности и определить, какая стратегия приведет к победе:
1. Первый ход:
- Белая шашка (B) может ходить только вправо на 1 или 2 клетки.
- Черная шашка (C) может ходить только влево на 1 или 2 клетки.
- Пусть первый игрок будет ходить черной шашкой (C).
Возможные ходы:
- C -> Лево на 1 клетку.
- C -> Влево на 2 клетки.
Можем заметить, что независимо от выбора хода первым игроком, второй игрок (играющий белой шашкой, B) всегда сможет ходить и тем самым выигрывать.
Таким образом, при правильной игре второй игрок всегда выиграет.
Обоснование:
1. Первый игрок может либо передвинуть шашку влево на 1 клетку, либо на 2 клетки.
- После этого второй игрок сможет передвинуть свою шашку на 1 или 2 клетки вправо.
- Таким образом, второй игрок всегда может "следовать" за первым игроком и не оставаться без хода.
2. Если первый игрок сделает очень долгий ход, передвинув свою шашку на 2 клетки, второй игрок может передвинуть свою шашку на 1 клетку вправо.
- Второй игрок всегда сможет ходить вперед позади шашки первого игрока и выиграть.
Таким образом, второй игрок всегда победит при правильной игре.
на 40 кілометрів