1. Найдите сказуемое и по месту инфинитива относительно сказуемого определите функцию инфинитива в предложении. Сочетания слов переведите. а. To serve special uses means...
To serve special uses metals and alloys must be...

b. To improve old processes one should...
To improve old processes is vital for...

c. To make steel harder it is necessary...
To make steel harder requires...

2. Найдите сказуемое и по месту инфинитива относительно сказуемого определите функцию инфинитива в предложении. Сочетания слов переведите.

а) 1. To be tested the metal is placed...
The metal to be tested is placed...

To be utilized in industry the metals are to be...
The metals to be utilized in industry are to be...

Our task is to vary the properties...
The designer is to vary the properties...

The new substance is to reinforce...
The problem is to reinforce...

3.а) Определите функцию инфинитива в предложении; б) дайте возможные варианты перевода предложений.

1. Above certain critical temperature changes begin to take place in the molecular structure of a metal. 2. To prepare metals for practical use requires much knowledge and experience. 3. The aim of any research is to enlarge the possibilities which are offered by modern science. 4. In order to prevent corrosion metals to be used in industry must be covered with special paint. 5. It is difficult to define what an amorphous material is it may be composed of crystals which are too small to be detected. 6. This metal is too brittle to be hammered. 7. Dissimilar metals and alloys are joined to get the final product with qualities of each component. Metals and alloys to be joined are placed close together and are subjected to pressure and shock waves. 8. To strengthen metals is to reinforce them with fibres.

4.а) Определите функцию инфинитива в предложении; б) дайте возможные варианты перевода предложений.

1. To produce changes in physical state a considerable amount of thermal energy must be supplied to metal. 2. Every good practice is to introduce the best scientific invention into industry. 3. Toughness is the ability of a material to absorb mechanical energy by permanent deformation without breakage. 4. Steam engines were the first to be tried in aeroplanes but they were too heavy to be of any real use. 5. Steel is the metal to be formed from iron with a definite amount of carbon. 6. If steel is heated above critical temperature, it becomes softer and much easier to be machined. 7. This alloy is not tough enough to be used in this process. 8. There exists a large number of metals to be found free in nature.​

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