Bytheearly20thcentury,astheUnitedStatesbecameaninternat...
问题详情：Bytheearly20thcentury,astheUnitedStatesbecameaninternationalpower,itsculturalself-identity(认同)becamemorecomplex.TheUnitedStateswasbecomingmorediverseasimmigrantsstreamedintothecountry,settli...