Прочитайте текст и выполните задания Ancient Greek Architecture 1. The ambition of the ancient Gree...: ответ на тест 922840 - Английский язык

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Ancient Greek Architecture
1. The ambition of the ancient Greek architects was to discover eternally valid rules of form and proportion; to erect buildings human in scale yet suited to the divinity of their gods; to create, in other words, a classically ideal architecture. Their success may be measured by the fact that their works have been copied on and off for some 2,500 years and have never been superseded. The Greek derived much from other Mediterranean civilizations – the plan of the temple from Crete, the columnar form from Egypt, the capital from Assyria.
2. One of the greatest monuments of ancient Greek architecture is the Athenian Acropolis. The Acropolis, the Greek for upper town, stands on a low rocky hill and contains the ruins of several ancient Greek architectural monuments.
3. The Parthenon, a stately building with an eight – column facade honouring the goddess Athena, was built by Ictinus and Callicrates in 447-438 B.C. Next to the Parthenon is an Ionic temple of Athena, the Erechtheum, built by anonymous architect in 421-406 B.C. In has the unparalleled portrayal of a contemporary event on the frieze of the building. It also had to serve different cults, which meant that its architect had to design a building with three porches and three different floor levels.
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Ancient Greek Architecture
1. The ambition of the ancient Greek architects was to discover eternally valid rules of form and proportion; to erect buildings human in scale yet suited to the divinity of their gods; to create, in other words, a classically ideal architecture. Their success may be measured by the fact that their works have been copied on and off for some 2,500 years and have never been superseded. The Greek derived much from other Mediterranean civilizations – the plan of the temple from Crete, the columnar form from Egypt, the capital from Assyria.
2. One of the greatest monuments of ancient Greek architecture is the Athenian Acropolis. The Acropolis, the Greek for upper town, stands on a low rocky hill and contains the ruins of several ancient Greek architectural monuments.
3. The Parthenon, a stately building with an eight – column facade honouring the goddess Athena, was built by Ictinus and Callicrates in 447-438 B.C. Next to the Parthenon is an Ionic temple of Athena, the Erechtheum, built by anonymous architect in 421-406 B.C. In has the unparalleled portrayal of a contemporary event on the frieze of the building. It also had to serve different cults, which meant that its architect had to design a building with three porches and three different floor levels.
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Why does the Erechtheum have three porches and three floor levels?

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The Best Building Materials
1. Building materials are very important in the construction. But it is more important for any designer to select and adapt such building materials of construction that will give the most effective result by the most economical means. In this choice of materials for any work of constructions many factors must be considered by the civil engineer. These factors include availability, cost, physical properties of materials and others.
2. Practically, all buildings materials have their advantages and disadvantages. That's why some materials are used most widely in building construction for the purpose of binding together masonry units. Among them are lime, gypsum and cement.
3. Last material forms very important elements in all masonry structures, such as stone, a brick. Since the time of its introduction a gradual improvement of Portland cement quality has led to the elaboration of rapid hardening Portland cement, or «high early strength». Later developments include low heat and sulphateresisting cements. The scope for such purpose-made cements has led to the development of an increasing variety such as high alumina cement, blast-furnace slag. They may be also white and coloured cements.
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                                       Factors affecting growth
1. The genotype of a plant affects its growth, for example selected varieties of wheat grow rapidly, maturing within 110 days, whereas others, in the same environmental conditions, grow more slowly and mature within 155 days.
2. Growth is also determined by environmental factors, such as temperature, available water, available light, and available nutrients in the soil. Any change in the availability of these external conditions will be reflected in the plants growth.
3. Biotic factors are also capable of affecting plant growth. Plants compete with other plants for space, water, light and nutrients. Plants can be so crowded that no single individual produces normal growth. Optimal plant growth can be hampered by grazing animals, suboptimal soil composition, lack of mycorrhizal fungi, and attacks by insects or plant diseases, including those caused by bacteria, fungi, viruses, and nematodes.
4. Some plants may be organized according to their seasonal growth pattern: annual plants live and reproduce within one growing season, biennial plants live for two growing seasons and usually reproduce in second year, and perennial plants live for many growing seasons and continue to reproduce once they are mature. These designations often depend on climate and other environmental factors; plants that are annual in alpine or temperate regions can be biennial or perennial in warmer climates.
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                                Crop alteration and biotechnology
1. Crop alteration has been practiced by humankind for thousands of years, since the beginning of civilization. Altering crops through breeding practices changes the genetic make-up of a plant to develop crops with more beneficial characteristics for humans, for example, larger fruits or seeds, drought-tolerance, or resistance to pests.
2. Crop breeding includes techniques such as plant selection with desirable traits, self-pollination and cross-pollination, and molecular techniques that genetically modify the organism. Domestication of plants has, over the centuries increased yield, improved disease resistance and drought tolerance, eased harvest and improved the taste and nutritional value of crop plants.
3. Careful selection and breeding have had enormous effects on the characteristics of crop plants. The green revolution popularized the use of conventional hybridization to increase yield many folds by creating «high-yielding varieties». For example, average yields of corn (maize) in the USA have increased from around 2.5 tons per hectare (t/ha) (40 bushels per acre) in 1900 to about 9.4 t/ha (150 bushels per acre) in 2001. Variations in yields are due mainly to variation in climate, genetics, and the level of intensive farming techniques.
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                                            Forest health
1. The importance of pests and their negative impacts on forests are often underestimated. Pest outbreaks can contribute either directly or indirectly to economic and environmental losses. Insects and diseases can have adverse effects on tree growth and survival, yield and quality of wood and non-wood products, wildlife habitat, recreation and scenic and cultural value. Yet they are integral components of forests.
2. Invasive plant species can also cause damage through competition and prevention of regeneration of native tree species, posing new challenges especially to the in situ conservation of forest biological diversity. Pollution is another threat to forest health and vitality.
3. Insects and diseases influence the health of natural and planted forests, trees also outside forests and other wooded lands. Movement of insects and diseases has been facilitated by increased long-range air travel and reduced travel time, increased international trade of agricultural and forest products, and the exchange of plant material. Forest pests can be extremely destructive, as seen in recent years in both developed and developing countries.
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