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Вопрос теста:
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Constructing Walls for Buildings
1. Walls may be constructed in different forms. The walls include windows and doors, heads and sills, stanchion casings and inner lining panels. The doors and windows provide for controlled passage of environmental factors and people through the wall line. The aluminium heads, sills and windows are fixed from inside the building. After this, the 900 mm and 1.800 mm wide exterior doors are installed. These doors are aluminum framed.
2. All walls are also designed to provide resistance to passage of fire for some defined period of time, such as a one-hour wall. The function of resisting fire is fulfilled by stanchions. The stanchions are enclosed in casings.
3. The walls are divided into interior and exterior walls. The exterior walls protect the building interior from external environmental effects such as heat and cold, sunlight, ultraviolet radiation, rain, sound, while containing desirable interior environmental conditions. The exterior walls are made up of brick cladding, wall planks. The wall planks are designed to be weatherproof and to support the outer cladding.
Завершите утверждение согласно содержанию текста.
Heat and cold, sunlight and rain, can be together called …
  • internal walls
  • Internal environmental factors
  • external environmental factors
  • external walls

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