A.完全競爭 B.完全壟斷 C.寡頭壟斷 D.壟斷競爭
A.1/2 B.1 C.2500 D.5000
A.規(guī)模經(jīng)濟 B.服務(wù)經(jīng)濟 C.范圍經(jīng)濟 D.網(wǎng)絡(luò)經(jīng)濟