A.微觀競(jìng)爭(zhēng)機(jī)制B.中觀競(jìng)爭(zhēng)機(jī)制C.宏觀競(jìng)爭(zhēng)機(jī)制D.產(chǎn)業(yè)內(nèi)競(jìng)爭(zhēng)機(jī)制
A.產(chǎn)品的差異性B.規(guī)模經(jīng)濟(jì)C.規(guī)模報(bào)酬遞增D.偏好相似
A.咨詢B.旅游C.建筑D.運(yùn)輸