A.人民群眾B.公共人群C.社會公眾D.部分群體
A.人B.實物C.資源D.資金
A.數(shù)據(jù)分組B.元數(shù)據(jù)規(guī)范C.數(shù)據(jù)加工D.數(shù)據(jù)轉(zhuǎn)換