BlackFridayistheFridayfollowingThanksgivingDayintheUnit...
問題詳情：BlackFridayistheFridayfollowingThanksgivingDayintheUnitedStates.Ithasbeenregardedasthebeginningoftheholidayshoppingseason.Althoughit'snotanofficialholiday,millionsofemployersgivetheiremployee...