Вопрос № 223885 - Английский язык

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1___________. There are two types: metal alloys and plastic polymers. The metal alloys were made first and they are usually an expensive mixture of titanium and nickel.
2_______:
- plastics that return to their original shape when the temperature changes.
One use is in surgery where plastic threads ‘remember’ the shape of a knot, react to the patient’s body temperature and make themselves into stitches.
- metal alloys  that have a ‘memory’ and can return to their original shape.
 3____________. The implant then expands back to its original shape.
- 4___________.

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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 _______.

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The Great Wall of China was built across northern China to protect the population. Before the third century BC there were lots of smaller walls and these were joined together to make one long. 1_______. The wall is over 2000 km long, 3.5m high, and 4.5m wide at the top.2___________.
The Egyptian pyramids are famous symbol of ancient Egypt.
3___________. The pyramids have square bases with sloping sides which meet at an apex. 4___________. One of the biggest pyramids is made of enormous stone blocks which weigh up to 200 tonnes each. It is estimated that 20-25,000 people worked for 20 years to build each pyramid.

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Engineering is everywhere. 1___________. For example, if a manufacturer wants a faster car, a smaller personal stereo, or a better pen, they will ask a design engineer to find a practical solution.
Engineering is both theoretical and practical. 2___________. The design solution must be a reasonable price, safe, and reliable. A new idea that is expensive, dangerous, or doesn’t always work is not a good solution.
Engineers use a method. 3___________. Engineers:
1. define the problem,
2. design a solution,
3. rest the solution,
4. evaluate the solution.
4____________. When a good solution is found, the next step is to:
     5. communicate the solution.

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1_______. The one thing they have in common is that they all use Maths and Science to improve industry and manufacturing.
The whole science of engineering can be broadly divided into three main areas:
- civil engineering (buildings, roads, etc.)
- 2_______
- electrical engineering (electricity, lighting, etc.)
Each of these three main area can be divided into specialist subjects.
Civil engineering covers mining and bridge building, mechanical engineering covers aeronautical and automobile engineering, electrical engineering covers electricity generation and wiring.
Clearly there is a big difference between building a road and designing a computer system so the best advice for students is:
think carefully about which area of engineering interests you most. It is difficult to study if you are not interested – and you may do the job until you are 60 years old.
think about what sort of person you are. Will you be happiest working in an office, in a factory, or alone?
3_______ Do you want to work with other people or alone? 4_______.
When you have decided which area you are interested in and thought realistically about what sort of person you are, then you can decide what sort of engineer you want to be.

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It is a foundation course for students with a general interest in engineering.
You will learn the different types of engineering; you do not specialize in one area.
1___________. You need at least three GCSEs including Mathematics, Science, and Design and Technology.
2_______:
- practical skills in manufacturing and maintenance
- 3___________
- key skills in information Technology
4___________.
You will spend some time in the classroom but most of your time will be spent doing practical tasks in the workshop, in the laboratory, or on computer screen.