填空题 Paragraph Three In the past, making structures quake-resistant meant firm yet flexible materials, such as steel and wood that bend without breaking. Later, people tried to lift a building off its foundation, and insert rubber and steel between the building and its foundation to reduce the impact of ground vibrations. The most recent designs give buildings brains as well as concrete and steel supports. These are called smart buildings. Different ways to i 1 quake-resistance of a building.