- 问题详情:Ontheold-timefarminAmerica,therewerechickens,cows,pigsandhorses.Buttherewereveryfewmachines.Mostoftheworkwasdonebythefarmfamily.Sometimesmoreworkmenwereneededinbusyseasons.Workdonebyhorsestookup79percent;bymen,15percent;andmachineworkonlytook...
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