Контрольная работа по предмету Английский на тему: Контрольная по английскому. Вариант 2.

Вариант № 2
Задание 1. Прочитайте, перепишите, используя нужную форму причастия, образованную от глагола в скобках. Переведите предложения на русский язык.
1. Modern computers (to solve) problems so quickly are electronic machines.
2. The letter (to write) to my friend is on the table.
3. When (to study) this compound we came to the wrong conclusion.

Задание 2. Прочитайте предложения, определите функции причастий. Переведите предложения на русский язык.
1. The data obtained are necessary for our engineers.
2. Our plant producing complex machinery is very large.
3. None of the data have been presented at the-conference.

Задание З. Прочитайте предложения, переведите письменно и укажите, в каком предложении использован независимый причастный оборот.
1. When heated to 100 ° water boils.
2. Having finished his talk, the speaker smiled and waited for the questions.
3. The range of application of stable isotopes being very, wide the scientists axe interested in them.

Задание 4. Прочитайте и переведите письменно текст.

Synthetic polymers and their application
Polymers are the dynamic part of industry, particularly plas¬tics and fibres. A polymer is a substance consisting of molecules and characterized by its viscosity colour and by its softening po¬ints. Until recently it was thought that the properties of the po¬lymers were determined only by the chemical structure of their molecules. Chemists after many years of research have established that the properties of polymers produced are largely determined by the pattern of their big molecules. The properties of polymers de¬pend on their super-molecular structure.
Polymers just like metal a can be alloyed, i.e. groups diffe¬rent in composition may be introduced into the structure of the polymers. A study has been made of possible variants of structural patterns of different polymers and of ways of developing the requi¬red structures. This has opened up the possibility for developing substances with scheduled properties.
High molecular compounds possessing a great variety of valuable properties, they can therefore be used in a wide range of things.
The main concern of researchers and engineers is to improve the quality of mass produced goods.
The so-called "aging" of material is a result of deterioration in the properties of polymers due to chemical and physical changes caused by the effect of light, heat and humidify. Many laboratories are conducting research to prevent these processes.

Задание 5. Исправьте предложения на основе текста.
1. The metals can be alloyed but the polymers cannot.
2. It is impossible to develop polymeric substances with the scheduled properties.
3. The so-called "aging" of the polymers is due to chemical and physical changes caused only by temperature.

Задание 6. Ответьте на вопросы письменно.
1. What are polymers characterized by?
2. What do the properties of the polymers depend on?
3. What is the main concern of the researchers and engineers?

Задание 7. Переведите письменно на английский язык, используя текст.
1. Полимеры широко используются в промышленности.
2. На полимеры влияет свет, тепло и влажность.
3. Основная задача ученых и инженеров – улучшить качество полимеров.