Если фокусное расстояние линзы F, то оптическая сила линзы D равна? - №29289589

Если фокусное расстояние линзы F, то оптическая сила линзы D равна?
- Предмет:
  Физика
- Автор:
  ice queenta3k
- 6 лет назад

Ответы 1

Вот !!!!!!!!!!!!!!!!!!
- Автор:
  herp derpq2z0
- 6 лет назад
- 0
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Three early civilizations.

A young boy takes his place in a row of school benches. The time is about 5, 000 years ago, and a school day is beginning.

The boy picks up a writing tablet that is made of clay. He looks at the lesson that his teacher has prepared. The boys use a pointed stick to copy symbols onto the tablet.

You are now in the classroom in 2011. Pens, pencils, and paper have replaced sticks and clay tablets. Today we learn about our past from books, journals, diaries, letters. We learn about our times from newspapers and magazines.

What is the link between you and the boy in ancient times? What makes it possible to read about a student in 3, 000 B.C. and about the last match of your favourite team?

Writing is what makes it possible. Many historians believe that the Sumerians developed the first system of writing. The student who marked his tablet ages ago belonged to the civilization that gave us the art of writing.

Sumerians, Egyptians and Phoenicians were the three ancient peoples that were the first to live in cities; to set up governments to share their ideas in writing.

What 3 things did early civilizations have the first?

Выберите один ответ:
letters, tablets, books
cities, governments, writing
pencils, pens, paper
- Предмет:
  Английский язык
- Автор:
  beans
- 6 лет назад
- Ответов:
  
  1
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EXERCISE 7. Read and translate the sentences; memorize the use of the Infinitive:

1. To see the wide grasslands is interesting.

2. They began to describe the climate of Russia.

3. I want to visit my relatives.

4. He wants to collect stamps.

5. They have an idea to restore this monument.

6. To prepare a report about the natural resources of Russia I went to the library.

7. To know the history of any country is useful.

8. It helps me to understand better the people’s customs and traditions.

9. I don’t want to talk about it.

10. On the Russian flag, there are three stripes (white, blue, and) to symbolize the earth, the sky and the freedom.
- Предмет:
  Английский язык
- Автор:
  areli
- 6 лет назад
- Ответов:
  
  1
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А) 50
Б) 56
В) 60
Г) 48
- Предмет:
  Математика
- Автор:
  sorenfxge
- 6 лет назад
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  1
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- Автор:
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How much to ban the user?

1 hour 1 day 100 years