Вопрос № 1072318 - Английский язык

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The fundamental purpose of a door is to provide access into or out of a building. Doors also serve for providing access into or out of various compartments of a building. Doors also have the following functions. They provide security, weather resistance, fire-resistance, thermal insulation, sound insulation. As to exterior doors, they must be well-designed and properly constructed. They must not leak air, wind, heat and water.
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The fundamental purpose of a door is …
Варианты ответов
  • to provide access into or out of a building
  • to leak air, wind, heat and water
  • to provide sound insulation
  • to provide thermal insulation
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Вопрос задал(а): Анонимный пользователь, 13 Ноябрь 2020 в 18:15
На вопрос ответил(а): Анастасия Степанова, 13 Ноябрь 2020 в 18:15