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The two primary categories of engines are the spark ignition (Otto-cycle) and the compression ignition (Diesel-cycle). In the spark ignition engine, the fuel is metered and introduced into the engine by either a carburetor or an injection system, When a carburetor is used, the fuel is metered by jets and orifices in the carburetor and added to the air as it flows through the venturi of the carburetor. Mixing occurs as the fuel–air mixture moves through the intake system and into the cylinder. A spark plug ignites the fuel–air mixture at the proper time. Fuel injection systems improve the fuel efficiency of a gasoline engine because the multiple sensors and computer can better match the fuel needs of the engine. Historically the additional cost of the system over a carburetor fuel system has limited its use to larger, multicylinder engines, but rising fuel costs and emission standards have been the impetus for increasing the use of fuel injection systems on smaller engines. An engine that uses injection does not have a carburetor; the fuel
is usually injected into the air stream at the throttle body or intake port. In some engines, a single injector is located at the throttle body (throttle body injection) that replaces the carburetor. This single injector meters the fuel for all of the cylinders. In the port injection system, an injector is positioned just outside the intake valve (port) leading into each cylinder.
1 how many armchears do you want?
2 wow! where do yoy buy this sofa?
3 aren't there any round tables?
4 is there 4 windows?
5 is that soft sofa maid of wool?
6 what type of bed your sister want?
7 could you eat at the table?
8 do you broke a chair yesterday?
1 Where is the chair? - где стоит стул?
2 Is the table next to the sofa?- стол стоит рядом с диваном?
3 How many chairs are around the table? - сколько стульев вокруг стола?
4 Is there a hanger in the closet? - в шкафу есть вешалка?
5 Is there a closet in the bathroom? - в ванной есть шкаф?
6 How many bedside tables are there in the living room? - сколько тумбочке в гостиной?
7 How many beds are there in the house? - сколько кроватей в доме?
8 Is there a bench in the hallway? - в прихожей есть скамейка?
9 Does your aunt have a bookcase? - у твоей тёти есть книжный шкаф?
10 How many chairs will your dad have in the room? - сколько будет стульев в комнате у твоего папы?
11 Do you have a slate in the room? - у тебя в комнате есть шифанер ?
12 How old is your sofa? - Сколько лет твоему дивану.
13 Does your house have a shivaner in the hallway? - В твоём доме в прихожей есть шифанер?
14 Does your uncle have a sofa in the gotsin? - У твоего дяди есть в гостиной диван?
15 How many sofas are in your house? - Сколько диванов в твоём доме?
1. You may use my dictionary.
2 She made payment yesterday.
3 Boris seldom goes abroad.
4. We will discuss the terms of delivery next Friday
5. My sister is writing now.
6. Our competitors want to develop our cooperation.
Отрицательная форма: They didn't sell much modern equipment last month.
Общий вопрос: Did they sell much modern equipment last month?
Специальный: When did they sell much modern equipment?
К подлежащему: What did they sell last month?
Альтернативный: Did they sell or buy much modern equipment last month?
Tag: They sold much modern equipment last month, didn't they?
London is the capital of Great Britain, its political, economic and cultural centre. It’s one of the largest cities in the world. Its population is more than 9 million people. London is situated on the river Thames. It was founded more than two thousand years ago.
London is an ancient city. It appeared at the place where the Roman invaders decided to build a bridge over the Thames. There are four parts in London: West End, East End, the City and Westminster.
The City is the oldest part of London, its financial and business centre. There are many offices, companies and banks in this part of the capital. The heart of the City is the Stock Exchange. The Tower of London and St Paul’s Cathedral are situated in the City.
Westminster is also important part of the capital. It’s the administrative centre of London. The Houses of Parliament, the seat of the British Government, are there. Opposite the Houses of Parliament is Westminster Abbey where kings and queens have been crowned and many famous people were buried. The Houses of Parliament are often referred to as the Palace of Westminster.
The Towers of the Houses of Parliament stand high above the city. On the highest tower there is the largest clock in the country, Big Ben. Big Ben strikes every quarter of an hour.
To the west of Westminster is West End, the richest part of London. It is full of luxury hotels, super-markets, cinemas and concert-halls. In the centre of the West End the Trafalgar Square is situated with the famous statue of Lord Nelson.
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