一种性质:半殖民地半封建社会。二对矛盾:外国资本主义和中华民族的矛盾,封建主义和人民大众的矛盾。三条线索:屈辱史、抗争史、探索史。四大阶级:无产阶级、农民阶级、地主阶级、资产阶级。五股思潮:封建专制、平均主义、君主立宪、民主共和、社会主义。六国列强:英、法、美、 One property: semi-colonial and semi-feudal society. Two pairs of contradictions: the contradiction between foreign capitalism and the Chinese nation, the contradiction between feudalism and the masses of the people. Three clues: history of humiliation, history of struggle, history of exploration. The four major classes: the proletariat, the peasant class, the landlord class, the bourgeoisie. Five shares of thought: feudal autocracy, egalitarianism, constitutional monarchy, democratic republicanism, socialism. Six countries: Britain, France, the United States,