Упражнение 9
- Above certain critical temperature changes take place in the molecular structure of a metal.
- At present they are studying various aspects of this problem.
- Having obtained the necessary results, we stopped our experimental work.
- Are the principles of television complicated?
- By counting the number of waves in a certain period, a very accurate measure of time can be defined.
- The melting point of aluminium is 657°C.
- Electrical charges are known to be positive and negative.
- Electrons leaving the surface, the metal becomes positively charged.
- Is every student present at the lecture today?
- For him to have done these experiments is a great success.
- Gamma rays have no electric charge.
- The capacities of these stations range from 600 to 700 kilowatts.
- In what fields is the use of lasers highly promising?
- Obtaining new data engineers can improve their knowledge.
- One can make matter vibrate in different ways.
- Robots can't be considered as substitutes for men.
- Scientists have to work hard to create a new atomic technique.
- What did it give birth to?
- In testing the devicesthey found some serious faults.
- Speaking about the new method of work the engineer told us many interesting details.
- The action of semiconductor devices was understood well.
- The discovery of radium was followed by other important inventions.
- At airports everywhere we shall find microwaves used with radar equipment to detect planes in the air, or guide them in to land.
- In our country great progress has been achieved in developing all branches of science and engineering.
- Minsk has become a well-built city with lots of new avenues, big plants and factories.
- But for the atmosphere no life would be possible on the Earth.
- Could these calculations have been performed in such a short period without a computer?
- Did you tell him that I should let him know the date of the conference?
- We suggested that his project be discussed in detail.
- The technician will have recorded the data before you come.
- We must compare our data with those that have been obtained by other investigators.
- The worker who is repairing the machine is very skilled.
- The measurements that must be made should be accurate enough.
- The higher we go into the atmosphere, the thinner the air becomes.
- They would finish the work in time, provided they had the necessary material.
- Unless it is too late, we shall go there.
- Some record must be kept of where the file of information has been stored.
- It was Einstein who provided a new conception of time, space and gravitation.
- It was in the 20th century that electronic computers appeared.
- Nanomedicine's nanorobots are so tiny that they can easily traverse the human body.