A.經(jīng)紀(jì)人B.代理中間商C.批發(fā)或零售商D.掮客
A.教材價格彈性高B.專業(yè)圖書價格彈性高C.大眾圖書彈性低D.教輔書彈性高
A.市場調(diào)節(jié)B.書商自主經(jīng)營C.保本微利D.自生自滅