2. Read the blog again. Answer the questions 1.What does Mary do?
She's a tennis player
2.How old is Mary?
3.Does Mary enjoy her job?
4.What time does she get up?
5.What does she do in the afternoon?
6.What is Mary's favourite thing about her job?

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:

перескажи самое главное:

Russia is one of the largest countries in the world. The vast territory of Russia lies in the eastern part of Europe and the northern part of Asia. Russia is washed by twelve seas and three oceans. Russia borders on many countries, such as Mongolia, China, Finland, Norway and so on. The main mountain chains are the Urals, the Caucasus and the Altai. The longest rivers are the Volga in Europe and the Ob, the Yenisei and the Lena in Asia. The largest lakes are Ladoga and Baikal. The Russian Federation is rich in natural and mineral resources. It has deposits of oil, gas, coal, iron, gold and many others. The current population of Russia is more than 140 million people. Russia is a presidential republic.

Объяснение: