A.非數(shù)據(jù)型數(shù)據(jù)B.數(shù)值型數(shù)據(jù)C.非數(shù)值型數(shù)據(jù)D.開放型數(shù)據(jù)
A.行為B.目標C.決策D.改進
A.觀察法B.談話法C.調(diào)查法D.測驗法