A—socialist economy B—capitalist economyC—collective economy D—planned economyE—controlled economy F—rural economicsG—liberal economy H—mixed economyI—political economy j—protectionismK—primary sector L—private sectorM—public sector N—economic channelsO—economic balance P—economic fluctuationQ—economic depression R—economic stabilityS—economic policy T—economic recoveryU—Economic trend V—economic situation （）自由经济（）经济形势