A.2 B.3 C.4 D.5
A.π=AC B.-π=AVC C.-π=AFC D.-π=TC
A.自由競爭的市場經(jīng)濟 B.中央集權(quán)的計劃經(jīng)濟 C.政府干預(yù)的混合經(jīng)濟 D.改革過程的轉(zhuǎn)型經(jīng)濟