下列关于关系模式的码的叙述中，______是正确的
A、主码只能包含单个属性C
暂无解析
Somelinguiststhoughtthatalllanguages______andwereruledbyacommongrammar.
You’dbetterleavethings________ifyoudon’tknowhowtodealwiththem
Thegovernmentcalledoutpolicementosuppresstheriot.
Wehave______at30days’sightfortheamountoftheinvoice.
TheultimategoaloflearningaforeignlanguageinaGrammar-Translationclassroomistoenablethestudentsto______itsliterature.
