1 The internal combustion engine is called so because fuel is burned
directly inside the engine itself
2 To describe the complete cycle, let's that the piston is
the top of the stroke (top dead center) and the and the exhaust
valves are closed, When the piston
moves down the inlet valve opens to
intake a charge of fuel into the cylinder. This is called the inlet (intake)
stroke.
3 On reaching the lowest position (bottom dead center) the pis-
der,
begins move upward the closed upper part the cylinder,
the valve is closed and the mixture is compressed by the rising
piston. This is called the compression stroke.
4 Asthe piston again
the top dead center the spark plugs ignite the mixture, hoth valves he
ing closed during its combustion. As a result of burning mixtures the
gases expand and great pressure makes the piston move back down the
cylinder. This stroke is called the
reaches
powerstroke
5 When the piston reach
the bottom of its stroke, the exhaust valve is opened, pressure is re-
lensed, and the piston again rises. It lets the burnt gas flow through the
exhaust valve into the atmosphere. This is called thexhaust stroke
which completes the cycle
6 So the piston moves in the cylinder down
(intakestroke), up (compression stroke), down (powerstroke), up (ex-
hanst stroke)
1 a
2 a
3 b
4 a
5 b
6 a
Объяснение:
I am Olga. I am 13 and I am a student of the secondary school. I am not very tall but I am not short either. My eyes are blue. My hair is brown and short. I like skating and reading.
My mother's name is Inna Vasilievna. She is 39 and she is a nurse in our hospital. My mother is very pretty and kind. Her eyes are big and grey. Her hair is black and short.
My father's name is Ivan Petrovich. He is 42 and he is a driver in the same hospital. My father is very strong and strict. His eyes are green. Her hair is black and short.He likes to play chess and we often play chess in the evening.
Our granny doesn't live with us, but she lives not far from our house so I often come to see her on Sundays. I visited her last night and she was glad to see me.
We are a friendly family and we try to get along with each other and try to discuss our problems and to solve them together.
Моя семья небольшая. Кроме моих родителей у меня есть старшая сестра, ее зовут Ирина. Ей 18, и она учится в институте. Она очень высокая и симпатичная. У нее голубые глаза и длинные светлые волосы.
Я Оля. Мне 13 лет, и я учусь в средней школе. Я не очень высокая, но я не маленькая. У меня голубые глаза. Мои волосы коричневые и короткие. Я люблю кататься на коньках и читать.
Мою маму зовут Инна Васильевна. Ей 39 лет, и она работает медсестрой в нашей больнице. Моя мама очень красивая и добрая. У нее большие серые глаза. Ее волосы черные и короткие.
Моего отца зовут Иван Петрович. Ему 42 года, и он работает водителем в той же больнице. Мой отец очень сильный и строгий. У него зеленые глаза. Он любит играть в шахматы и мы часто играем с ним в шахматы по вечерам. Наша бабушка не живет вместе с нами, но она живет не далеко от нашего дома, поэтому я часто прихожу к ней по воскресеньям.
Мы дружная семья, и мы стараемся ладить друг с другом, мы обсуждаем наши проблемы и стараемся решить их вместе.