![ThebasicflagoftheUnitedStatesisoneoftheworld’soldestnat...]( "ThebasicflagoftheUnitedStatesisoneoftheworld’soldestnat...")
- 问题详情：ThebasicflagoftheUnitedStatesisoneoftheworld’soldestnationalflags.OnlythebasicflagsofAustria,Denmark,GreatBritain,theNetherlands,Sweden,andSwitzerlandareolder.DuringthediscoveryandsettlementofwhatisnowtheUnitedStates,theflagsofvariousEuropea...
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