A.名義測度(nominal measurement) B.序次測度(ordinal measurement) C.間距測度(interval measurement) D.比率測度(ration measurement)
A.Endnote B.Refworks C.Biblioscape D.Zotero
A.旅游需求預測 B.旅游數(shù)量分析 C.超額預訂問題 D.旅游線路優(yōu)化