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1) The great national spirit of the Chinese nation (2) Lei Feng spirit, Daqing spirit, two bombs and one satellite spirit, flood fighting spirit, anti-SARS spirit, manned space flight spirit, Three Gorges immigrant spirit, snowstorm fighting spirit and earthquake relief spirit. (3)① Importance: The Chinese national spirit is the soul of our nation, a valuable spiritual wealth, the foundation for the survival and development of our country and nation, and an inexhaustible source of our national cohesion, vitality and creativity. ② Teenagers carry forward and cultivate national spirit in real life: for example, set up lofty ideals and enhance social responsibility; Carry forward traditional virtues and improve moral quality; Learn scientific and cultural knowledge and cultivate innovative spirit and practical ability; Carry forward the spirit of hard work and entrepreneurship.