Thebestexampleofsomethingisoftencalledthe"goldstandard....
问题详情：Thebestexampleofsomethingisoftencalledthe"goldstandard."Itsetsthestandardagainstwhichotherthingsaremeasured.Ineconomics,thetermdescribeshowmajortradingnationsonceusedgoldtosetcurrencyvaluesa...