)you are going to give a talk about relationship with friends. remember to say: -how people choose friends -why friends quarrel sometimes -what makes friendship so necessary to everybody.

Вы собираетесь дать говорить об отношениях с друзьями.
Не забудьте сказать:
-Как люди выбирают друзей
-Почему друзья ссорятся иногда
-что делает дружбу, столь необходимое всем.

Вы собираетесь дать говорить об отношениях с друзьями. Не забудьте сказать: -Как люди выбирают друзей -Почему друзья ссорятся иногда -что делает дружбу, столь необходимое всем.

My native city is Rostov-on-Don. It is the capital of the Don area. It was founded in 1749. It is situated on the right bank of the river Don.

In the past Rostov was a small town with small population. But now the territory of Rostov-on-Don is 380 square kilometres and the population is more than one million people.

Our city is a big industrial, scientific and cultural centre in the South of Russia. The plant “Rostselmash” is known not only in our country but abroad as well.

The largest scientific and educational establishment is the Rostov State University, which was founded in 1915 and now has more then ten faculties.

In Rostov there are four theatres: Gorky Drama Theatre, Musical Comedy, Puppet Show, Theatre of Young Spectators. The Gorky Theatre is surrounded by a large park named after the October Revolution. It is one of many parks and gardens which make Rostov a green town and where Rostovites like to walk on a nice sunny day.

During the Second World War Rostov-on-Don was occupied twice (1941 and 1942). The war cost Rostovites huge losses in life. That is why in the city there are a lot of monuments devoted to the war years and people who gave their lives for our peaceful life.

Rostov-on-Don is a large transport centre. It is not only a big knot of railways and airways but it is also the port of five seas (the Baltic, the White, the Caspian, the Black and the Sea of Asov).

Nowadays Rostov-on-Don as many other cities and villages in Russia is undergone the process of economical changes. But we hope that in some years people will be able to overpass all the difficulties and Rostov-on-Don will occupy its place of one of the biggest industrial cities of Russia.

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: