A.實(shí)體經(jīng)濟(jì)B.共享經(jīng)濟(jì)C.虛擬經(jīng)濟(jì)D.平臺經(jīng)濟(jì)
A.醫(yī)療成本B.人力成本C.交通成本D.餐飲成本
A.需要、限制B.需要、供給C.平衡、限制D.平衡、供給