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Используя диалог из упражнения 1, составьте монолог о машинах и механизмах. Постарайтесь употребить следующие фразы:
• This theme is significant because …
• I’d like to pay attention to … because …
• It is important to know that …
• It is interesting to know that …
• You should note that …
• You shouldn’t mix …
• That means that …
• The definition of ... is the following …
Диалог
The lesson is devoted to the machines and mechanisms.
Teacher: Professor Robinson (Prof. Robinson).
in the bicycle. Note that the name of the working body indicates that
this part helps a person to perform the work for which the machine was
created to.
The purpose of the engine is to transform one form of energy into
another. In a car, motorcycle, tractor, energy of fuel is converted into
heat and then into mechanical motion. The engines of the vacuum
cleaner, washing machine turn the electrical energy into mechanical.
All engines, including electric motors, are heated during operation. This
means that part of the energy is converted into heat.
Student 2: But, Prof. Robinson, a bicycle does not have any engine.
Why is it called a machine?
Prof. Robinson: Good question! You see, the person performs the
role of the engine and spends his energy. That is why, it is a machine.
Student 2: Now, it’s clear for me. Thank you!
Prof. Robinson: Good! Now, let’s sum up. Machines are devices that
perform useful work for a person and at the same time turn one kind of
energy into another. The main parts of each machine are the working
body, engine, and mechanism. Mechanism is a device for converting one
kind of motion into another.
Thank you for attention. Revise the material “Machines and Mecha-
nisms” and be ready for the next lesson!

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26nn
26nn
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Azoo is a place where various animals, reptiles, mammals, insects and birds are kept. sometimes you can see rare species of animals there. usually zoos don’t contain domestic or farm animals, but sometimes there are children’s areas with such creatures, as donkeys, mini-horses, sheep, geese, pigs, rabbits and even pheasants. these are secluded areas where children can pet and feed animals. a visit to the zoo can be both entertaining and educational. there we can learn new facts about animals’ lives. due to quick urbanization and deforestation many species cannot live in their natural habitat anymore. that’s why zoos and reservations exist. opinions on advantages and disadvantages of keeping animals in the zoos differ. some people think that zoo is a perfect place for animals, as they are always fed, well-treated and live in good conditions there. besides, people are happy to have a chance to see wild, beautiful and exotic animals in live, to learn more about their behavior and lifestyle. from the other hand, animals have to live as close to their natural habitat as possible, for example, near forests, rivers, savannahs, jungles, safari, etc. in this respect, open zoos or wildlife reserves are much better. they usually occupy vast expanses of land and let the animals move around instead of sitting in a cage. these areas are protected and supervised by the government. thus, animal preservation, as well as pros and cons of the zoo are a frequent topic of discussion.

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