Formerly,intheUnitedStates,manynursesworkedasprivatedutynursesratherthaninhospitals.
A、PreviouslyPeoplewhodonotsleepenoughtendtobecomeirritable.
Formulatedin1823,theMonroeDoctrineassertedthattheAmericaswerenolongeropentoEuropeancolonization.
AlthoughtheCarbon14methodofdatingoldobjectsisnotfoolproof,itisthebestmethodavailableatpresent
InthenortheasternUnitedStates,itrainsintermittently间歇地throughoutthespring.
Despitetheproliferationofotherfastermodesoftransportation,therailroadsremainthelargestcarriersofintercityfreightintheUnitedStates.
