Вопрос № 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may be measured by the fact that their works have been copied on and off for some 2,500 years and have never been superseded.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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Why does the Erechtheum have three porches and three 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may be measured by the fact that their works have been copied on and off for some 2,500 years and have never been superseded.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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The term «acropolis» means in Greek …

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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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One of the main conditions of normal plant growth …

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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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Insects and diseases spread more quickly nowadays due to …

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                                            Mangroves
1. Mangroves are the characteristic littoral plant formations of tropical and subtropical sheltered coastlines. Generally speaking, mangroves are trees and shrubs growing below the high-water level of spring tides. Their root systems are thus regularly inundated with saline water, even though it may be diluted due to freshwater surface run-offs and only flooded once or twice a year. Mangroves depend on terrestrial and tidal waters for their nourishment, and on coastal soils and silt deposits from upland erosion as substrate for support.
2. Mangroves are among the most productive terrestrial ecosystems and are a natural, renewable resource. However, the world's mangroves are beleaguered. Mangroves are losing their habitats as rivers are dammed, their waters diverted and the intertidal zone extensively developed for agriculture or aquaculture and generally dried up.
3. The depletion of mangroves is a cause of serious environmental and economic concern to many developing countries. This stems from the fact that at the interface between the sea and the land, mangroves play a pivotal role in moderating monsoonal tidal floods and in coastal protection. The continuing degradation and depletion of this vital resource will reduce not only terrestrial and aquatic production and wildlife habitats, but more importantly, the environmental stability of coastal forests that provide protection to inland agricultural crops and villages will become seriously impaired.
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Mangroves play an important role in agriculture …