- 问题详情:WashingtonthecapitaloftheUnitedStates.It'sthecenterofthenationalgovernment.It'sabusy,workingcitywithalargepopulation.Butwhatismore,Washingtonisalsoacityofhistoryandculture.Washingtonwascreatedin1790,whenCongress(国会)decidedtoplacethenation's...
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