Types of artificial waterways.

A canal can be created where no stream presently exists. Either the body of the canal is dug or the sides of the canal are created by piling dirt, stone, concrete, or other building materials. The water for the canal must be provided from an external source like other streams or reservoirs. Examples include canals that connect valleys over a higher body of land, like Canal du Midi and Canal de Briare.

A stream can be canalized to make its navigable path more predictable and easier to maneuver. Canalization modifies the stream to more safely carry traffic by controlling the flow of the stream with dredging, damming, and modifying its path. Examples include Basse Saône, Canal de Mines de Fer de la Moselle, and Aisne River. Riparian zone restoration may be required.

When a stream is too difficult to modify with canalization, a second stream can be created next to the existing stream. This is called a lateral canal. The existing stream usually acts as the water source and its banks provide a path for the new body.

Вариант №4.

I. Перепишите предложения, определите степени сравнения прилагательных или наречий, переведите на русский язык.

1. London is the largest city in Europe.

2. He is the youngest in our family.

3. She speaks English better than he.

4. Tree is one of the largest and oldest plants on the Earth.

5. This farm has the poorest soil in our region.

 

II. Перепишите предложения, определите видовременные формы глаголов и укажите их инфинитив, переведите предложения на русский язык.

1. He did not go to the country.

2. We will go to the library in the evening.

3. We went home as it was cold.

4. They had done much work by 7 o'clock.

5. They have seen them this month.

III. Перепишите предложения, подчеркните в каждом из них модальный глагол или его эквивалент, переведите предложения на русский язык.

1. I am to be at the library.

2. She is to come.

3. You must look through this journal.

4. May I take your dictionary?

5. He could play chess well.

IV. Перепишите предложения. Подчеркните причастия, установите функции каждого из них (определение, обстоятельство, часть сказуемого). Переведите предложения на русский язык.

1. Preparing for the examination she worked at the library.

2. Speaking she entered the room.

3. It was not snowing.

4. A reading student is my friend.

5. I am going to the library now.

 

V.Прочитайте и переведите текст.

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