№1. Which of the materials listed below are natural, artificial?
Metal, stone, brick, concrete, gravel, wood, sand, timber, iron.
№2. Which of the properties of construction materials may be classified as advantageous? Disadvantageous?
High cost fire-resistance non-fire-resistance
Low resistance low cost high strength
High weight durability corrosion-resistance
Heavy weight hardness softness
№3. Which of words given below are nouns, verbs, adjectives, adverbs? Translate every word.
Height, high, deepen, depth, deeply, strength, strengthen, strong, long, highly, lengthen, length, hard, hardly, harden, hardness.
№4. Read and translate the article in writing.
Materials used for construction purposes possess different properties. They differ in durability, strength, weight, fire-and decay-resistance and, naturally, cost.
Wood, timber, brick, stone, concrete, metals, and plastics belong to the most popular building materials used nowadays. They all have their advantages and disadvantages that are taken into account when designing a structure.
Wood belongs to naturally growing materials. It is known to be the oldest construction material and is still widely used for different purposes. Wood is popular since it has low weight and is easy to work. Besides, it grows naturally and is cheap. But its usage is limited because of its disadvantages: it easily burns and decays. As to stone, it also belongs to the oldest building materials. Among its advantages there are strength, high heat insulation and fire-resistance.
Brick belongs to artificial construction materials. It has been used in many countries and in different climates. In modern times bricks vary widely with the method of production and temperature of burning.
Concrete is known to be one of the most popular building materials. It is produced by mixing cement, gravel, water, and sand in the proper amounts.
№5. Answer the questions.
1. Into what groups can construction materials be divided?
2. What are the advantages (disadvantages) of wood, stone, metals?
3. What two groups are metals divided into?
4. What is the difference between ferrous non-ferrous metals?
1. Mike always helps his grandparents.
2. Andy likes to swim in the swimming pool.
3. Vicky makes the best pizza in her town.
4. Larry meets his friends every weekend.
5. Dolly knows everything about cats.
6. Nelly writes wonderful poems.
7. Garry understands French well.
8. Sam teaches his little brother to ride a bike.
9. Pam often plays with the ball in the yard.
10. A bird sings merrily in the tree.
11. My cousin often flies to Prague.
12. His mother always watches TV in the evening.
13. Alice sometimes sees him in the library.
14. My father usually washes the car on Saturday.
15. Bill never tells lies.
Объяснение:
...
Объяснение:
Popular science literature - literary works about science, scientific achievements and scientists, intended for a wide range of readers.
Popular science literature is designed both for specialists from other fields of knowledge and for poorly trained readers, including children and adolescents.
Popular science literature includes works on the foundations and individual problems of fundamental and applied sciences, biographies of scientists, descriptions of travels, etc., written in various genres.
The best popular essays promote the achievements of science in a form that is most accessible to the readers to whom they are intended. Non-fiction literature is adjacent to popular science literature.
Popular knowledge sensu stricto is knowledge not for specialists, but for a wide range of adult amateurs with a general education. Therefore, it cannot be considered an introductory science; school textbooks serve these purposes, not popular books. A characteristic feature of the popular presentation of scientific knowledge is the lack of details and, above all, controversial opinions, as a result of which this knowledge appears artificially simplified. The form of this presentation has artistic appeal, liveliness and accessibility. More importantly, it is presented in an apodictic manner that allows one to simply accept or reject points of view. Simplification, imagery and apodicticity of judgments are the most characteristic features of exoteric knowledge.