A.Copyright B.Civillitigation C.Digitalrightmanagement:DRM D.Patent
A.abcde B.badce C.abced D.bdace
A.直效營(yíng)銷 B.關(guān)系營(yíng)銷 C.利基營(yíng)銷 D.個(gè)體營(yíng)銷