Расположите пропущенные предложения в таком порядке чтобы получился связный текст The device is call...: ответ на тест 605291 - Английский язык

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The device is called a Dervish. It is a mine-detonating vehicle for clearing anti-personnel mines from farmland in developing world countries. 1 _______. The United Nations estimates that 24,000 people die each year because of mines.
2 _______. Each wheel has steel teeth to create more pressure. When the teeth pass over a mine, it explodes. 3 _______. A motorbike engine powers the Dervish.          4 _______. As each wheel passes a certain point in the rotation, it slows down. This makes the machine advance in tight circles, about 30 mm apart. For this reason no mine in its path is missed.

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The device is called a Dervish. It is a mine-detonating vehicle for clearing anti-personnel mines from farmland in developing world countries. 1 _______. The United Nations estimates that 24,000 people die each year because of mines.
2 _______. Each wheel has steel teeth to create more pressure. When the teeth pass over a mine, it explodes. 3 _______. A motorbike engine powers the Dervish.          4 _______. As each wheel passes a certain point in the rotation, it slows down. This makes the machine advance in tight circles, about 30 mm apart. For this reason no mine in its path is missed.

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1 _______. When the driver brakes, the resistance of the motor helps to slow down the car. At the same time, the energy from the wheels turns the motor which then functions as a generator, producing electricity to recharge the batteries. When the batteries are low, the petrol engine also drives the generator.
2 _______. The petrol engine shuts off when the car comes to a stop. When the driver presses the accelerator, the motor instantly starts the engine again. No energy is wasted from idling when the car is stopped.
3 _______. They do not require special fuel like hydrogen cars and, unlike electric cars, they do not need to be plugged in overnight to recharge the batteries.              4 _______.

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1 _______. This logs all passenger calls and monitors the number of passengers travelling from floor to floor, the position of any car in the system, and its speed. It can direct passengers to the car which will get them to their destination fastest and will prevent any car which is overloaded from moving.
Lifts have many safety devices which make it virtually impossible for an accident to happen. 2 _______. Each one is strong enough to support the car. If the car starts too quickly, a governor or safety brake locks the car to the guide rails. 3 _______. Doors on the car ensure that no passenger can be injured by contact with the shaft. The car cannot move until both sets of doors are closed. 4 _______. All these things combined make travel in lifts one of the safest journeys you can make!

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Skyscrapers start with a very large hole in the ground which will contain the foundations, several floors, and possibly even a metro or subway station. 1 _______. Usually they are made by drilling narrow, deep holes and filling them with reinforced concrete to form piles. 2 _______. A thick raft of concrete is laid on top of the piles.
Vertical steel columns are bolted to the foundations. 3 _______. Steel girders are fixed horizontally from column to column by Steel Erectors to form a strong framework. Metal decking is laid across the girders and filled with lightweight liquid concrete which is pumped up from the ground. When it sets, it forms the floors.
Ducts are installed below the floors to carry all services:  electricity, water, drains. 4 _______. If a fire happens, it is important that the structure can withstand high temperatures without buckling.
The same process is repeated as the building rises. In some construction methods, entire floors are built at ground level and hoisted into position by cranes.
The outside of the building is covered in cladding. This consists of prefabricated panels of materials such as stainless steel, aluminium, and glass.

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Pedro Fernandez: Bike Maker
When I choose a material for a bike frame, I have to think about the properties of the material. How elastic is it? If you bend or stretch it, will it go back to its original shape? If it does, it has high elasticity. How strong is it? There are two types of strength. The first is how much force you need to bend it to a point where it can’t go back to its original shape. 1 _______. Steel is the least expensive choice. There’s a wide range of standard gauge tubes available. It’s strong and it has good elasticity but it’s heavy.
Aluminium is light and strong but it’s flexible. The more it bends, the quicker it breaks. 2 _______. That limits the amount of bending.
Titanium has a great strength-to-weight ratio. It’s got good elasticity so when it bends to return to its original shape. 3 _______. But it’s expensive-fifteen times the price of steel!
The professionals use carbon fibre. It’s very light and it’s very strong. You can shape it any way you like. 4 _______.