4. Summarize the general ideas of the text Use the following plan:
1) Active and passive components of electronic circuits.
2) The main elements of a diode.
3) Using of diodes and triodes.
4) Different kinds of semiconductors.
5) Types of transistors.
5. Underline Complex Object with the Infinitive in the following sentences and translate them:
1) We consider the circuit to be too strong for our purpose.
2) We believe the programming to have been done very skillfully.
3) Modern discoveries allow science and engineering to be developed rapidly.
4)We know silver and copper to be very good conductors of electricity.
5) We know him to be the first inventor of electrical measuring instruments.
6) When the state or condition of a body is such that it can do work, we know the body to possess energy.
6. Underline Complex Subject with the Infinitive in the following sentences and translate them:
l) Yablochkov is known to be inventor of electric candle.
2) The method proposed by the young engineer is known to be very effective.
3) Certain properties of matter are considered to be always the same under definite conditions.
4) The number of protons was assumed to be sufficient to account for the atomic weight.
5) These chemical changes prove to have been caused by heat.
6) Lomonosov and Franklin happened to make their experiments in the field of atmospheric electricity at about the same time.
7. Underline For + Infinitive construction in the following sentences and translates them:
l) He explained the scheme for the second time for us to understand it better.
2) At present the only thing for you to do is to work systematically.
3) It is my purpose in this paper to describe all the parts of this engine in detail for you to understand what a complicated mechanism it is.
4) It required some more experiments for the scientist to prove the correctness of the result obtained.
5) It is necessary for all generators to be economically and efficiently serviced.
6) It is easy for the dispatcher to give a signal and get a channel to the desired base transmitter.
7) It is impossible for the driver to stop the car at such a high speed quickly.