下列关于 ER模型的叙述中，哪一条是错误的?
A、ER模型是实体联系模型的简称C
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ThefunctionsofinstitutionsofhighereducationintheU.S.are________.
Inmostofhiswritings,()deliberatelybrokeupthechronologyofhisnarrativebyjuxtaposingthepastwiththepresent,inthewaythemontagedoesinamovie.
Ayearlater，withthenation’seconomy________，Bush’sapprovalratingdroppedbelow40percent
Itisvitalthatthework_______intime.
TheToriesweretheforerunnersof________,whichstillbearsthisnicknametoday
