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составьте структурные формулы двух органических соединений содержащих в молекуле четыре атома углерода и одну п-связь
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Решение во вложении.
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Автор:
samsonwvis - 5 лет назад
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0
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Всё понятно без объяснений.
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Автор:
peanuthebert - 5 лет назад
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0
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Токарь , делая по 108 деталей в час,
Изготовил все детали за 5 часов.
Если он будет делать по 60 деталей в час, то за сколько часов изготовит все детали?
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Автор:
keonhouse - 5 лет назад
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Помогите с переводом!)
Hello! Let me introduce myself to you. I'm Alexander, Alex for short. I live in Moscow. I'm a student of the 11th grade. We are a family of four my mother, my father, my elder brother and me. We live in a block of flats on the tenth floor. There are three rooms in our flat and we have all modern conveniences. I share a room with my elder brother. My brother is a student. We don't have any secrets from each other. We get on very well with my brother. Sometimes I even borrow his clothes and he never gets annoyed. We don't feel competitive because we have different interests. I'm more academic and he's more artistic. But we are fond of sports very much. We both go to the swimming pool twice a week. It helps us to keep fit, it gives us good stamina, and it's good for our hearts and lungs. We hardly ever quarrel or fight. My brother never sees me as being in the way. I think I'm quite easy-going. I'm similar in personality to my mother. She is always very friendly to all although she can be quite critical of people. I like to be friendly to the people around me, and I don't normally like to let my bad moods and anger inside me come out and affect other people. I don't know if I'm particularly obsessive.
I like to do different things. I am fond of collecting different things. One day I collect toy cars, the other day I want to collect badges. But most of all I prefer collecting stamps because it's a family hobby. You can learn a tremendous amount through stamps, especially about history. Stamps are a great way to bring history. All the members of my family collect stamps and the theme of our collection is history. It is a long-lasting hobby and who knows — in 20 years or so it may have become an impressive collection that can be appreciated and enjoyed by my own children too.
I have grandparents, my mother's parents. They don't live with us, but I often visit them. They live a very routine life but they like it. I can't put my finger on their flat exactly, but there is some atmosphere in their house like nothing has changed for twenty years. My parents are doctors and they work in the hospital. They are very giving, caring persons and always consider those around them. They work very hard in their hospital and really put all their energy in their work. They are very much in love, even after years of being married and always caring for each other. My parents have warm friendly eyes and always express a spirit of goodwill towards people.
I love my parents very much and my ambition is to be a doctor too, because I want to help people if they have some problems with their health. I am originally became interested in medicine during my 9th grade, when I realized that my skills and my traits would serve me well in my future career. Besides I'm good at Chemistry, Biology and History and they are my favourite subjects. I'm not very good at English but I understand that it is one of the most important subjects now, and I try my best to improve it.
We have a pet. It's a dog. Her name is Sunny. Her mother is Scotch shepherd dog. I am never lonely with my pet. She is a great favourite with everyone in our family. All people admire her. She wears a good collar with her name. She especially likes morning walks with my father.
My native city is Moscow. Many people associate Moscow with the Kremlin and Red Square as the heart of the city. It is really the oldest historic and architectural centre of Moscow and my favourite place in Moscow, because it's connected with the history of my country.
Nowadays the Moscow Kremlin with all the beauty of the palaces and cathedrals is a wonderful sight. All these cathedrals have been converted into museums. Ivan the Great Bell Tower, one of the most remarkable structures of the 16th century, rises in the centre of the Kremlin. It unites all the Kremlin Cathedrals into a majestic ensemble.
One of the well-known Kremlin museums is the Armoury Chamber. It was built in 1851. The famous golden cap of Monomach, the first Russian imperial crown of Catherine II made of silver, and many other precious historic items are exhibited there. So when you come to my native city, I'll show you all interesting and amazing sights of it.
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Предмет:
Английский язык -
Автор:
bridgerbzz - 5 лет назад
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что такое ДК . ПОЖАЛУЙСТА СДЕЛАЙТЕ МНЕ НУЖНО
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Помогите пожалуйста решить три задачи.Задача √1)Купили5 одинаковых альбомов по цене 60к.и несколько одинаковых тетрадей по цене 15 к.За все альбомы заплатили столько же деньг,сколько за все тетради.Сколько купили тетрадей?С паяснением пожалуйста........Задача√2 Две стороны треугольника имеют одинаковую длину,равную 60 дм.Периметр треугольника 160 дм.Найди длину трейтей стороны.С паяснением пожалуйста.........Задача √3 От одного цветка в противоположных направлениях поползли две божьи коровки и через 3 с.остоновились.На каком расстоянии они оказались друг от друга,если скорость одной из н была 2см/с,а у дру но ой 3-см/с?С пояснением пожалуйста???? Помогите пожалуйста очень срочно
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