AlthoughtheUnitedStatescoverssomuchlandandthelandproduc...
問題詳情:AlthoughtheUnitedStatescoverssomuchlandandthelandproducesfarmorefoodthanthepresentpopulationneeds,itspeoplearebynowalmostentirelyanurbansocietyLessthanatenthofthepeopleareengagedinagriculturean...