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ed cladding material that is lightweight and virtually maintenance free. Glass was known in prehistory and is celebrated for its contributions to Gothic architecture.Vocabulary:1. timber2. marble3. tile4. cement5. masonry wall6. cohere7. mortar8. lime9. profusion10. aluminum11. anodized coating12. cladding13. celebrated14. Gothic15. architectureUNIT002Two basic approaches to spanning over masonry walls are postandlintel construction and arch, vault, and dome construction.Vocabulary:1. span2. postandlintel3. arch4. vault5. domeUNIT003The Chicago architect Louis Sullivan’s career converges with the socalled Chicago School of Architects, whose challenge was to invent the skyscraper or highrise building, facilitated by the introduction of the electric elevator and the abundance of steel. The building’s skeleton could be erected quickly and the remaining ponents hung on it to plete it, an immense advantage for highrise buildings on busy city street.Vocabulary:1. architect2. converge3. school4. skyscraper5. facilitate6. electric elevator7. abundance8. skeleton9. erect10. ponent11. immenseUNIT004Interior design of apartments and houses, that is, dwellings, usually involve both practical and aesthetic decisions. Choices have to be made for almost every element, ceilings and lamps, curtains and blinds, corridor and doorway, niches and ledges, grate and ventilations, terraces and staircases, even sewers or drainers. Sometimes such designs are extended to be the fa231。ade of the building, and even to a fountain, or a gardening yard. 1. interior design2. dwelling3. involve4. aesthetic5. ceiling6. lamp7. curtain8. blind9. corridor10. doorway11. niche12. ledge13. grate14. ventilation15. terrace16. staircase17. sewer18. drainer19. fa