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на типы условных предложений. Предложения запишите на правой
стороне тетради
1. If conditions permit …
2. If the earth was made of the same material …
3. If they had caught the early train …
a. … they would have been here by now.
b. … the geologists will apply aerial prospecting.
c. … its density would vary with pressure.
IV . Переведите предложения, обращая внимание на выделенные слова
1. As the pressure increases the ice melts.
2. Unlike massive igneous rocks, most sedimentary rocks are laid down in a series of individual beds.
3. A single layer is known as a bed.
4. Some people use it to refer to anything that is neither animal nor vegetable.
5. Either of these rocks are very important.
V . Выберите инфинитив из данных форм глагола. Предложения
запишите на правой стороне тетради
1. Many centuries ago the earth was believed … the centre of the Universe.
a. to be
b. is
c. be
2. Pegmatites are said … by magmas unusually high in fluids.
a. deposited
b. deposits
c. to have been deposited
3. Many people seem … in earthquakes.
a. interests
b. interested
c. to be interested
4. Specialists consider open-сast mining …
a. to be promising
b. promise
c. promised
5. Near-surface greenstone belts are known … in the area.
a. occur
b. occurs
c. to occur
VI . Выберите правильную неличную форму глагола. Предложения
запишите на правой стороне тетради
1. Some of the earthquakes are too small … any serious effect.
a. to have
b. having
2. Rocks composed of large crystals are … coarse-grained.
a. called
b. to call
3. A geologist must … minerals.
a. classifying
b. classify
4. Mercury and the moon appear … no core of this type.
a. having
b. to have
5. … valuable minerals it was necessary to know their various physical properties.
a. To recognize
b. Recognized
6. It is difficult … the nature of fuels without studying their origin.
a. understanding
b. to understand
VII . Прочитайте и устно переведите текст.
Fuels
The chief sources of energy are oil, natural gas, coal, water power and atomic energy. Coal, gas and oil represent energy that has been concentrated by the decay of organic materials. Most fuels are carbon-containing substances that are burned in air. In burning fuels give off heat which is used for different purposes.
Fuels may be solid, liquid and gaseous. Solid fuels may be divided into two main groups, natural and manufactured. The first group includes coal, wood, peat and other plant products. The second group includes coke and charcoal obtained by
heating coal in the absence of air. Liquid fuels are derived almost from petroleum.
Petroleum is found in porous sedimentary rocks where the geologic formation
allowed the oil to collect from a wide area. Petroleum is one of the most efficient
fuels and raw materials.
Of gaseous fuels the most important are those derived from natural gas, chiefly methane, or petroleum. Gas is the most economical and convenient type of fuels.
Generally speaking, all types of fuels are of great economic importance as they represent the sources of energy the man uses today.
Выполните следующие упражнения к тексту:
I . Ответьте на вопросы к тексту
1. What are the chief sources of energy?
2. What do coal, gas and oil represent?
3. What do fuels give off in burning?
4. What types of fuels do you know?
5. Where is petroleum found?
6. Why are all types of fuels of great economic importance?
II . Подберите синонимы из списка В к словам из списка А
| А | B |
| to collect to be composed of to obtain type to manufacture convenient man to concentrate to include substance important | to get to be made up to gather to accumulate human comfortable to produce significant to contain matter kind |
Дата: 2019-02-25, просмотров: 387.