A.規(guī)模收益不變 B.規(guī)模收益遞減 C.規(guī)模收益遞增 D.規(guī)模收益守恒
A.資前時(shí)期 B.投資時(shí)期 C.投資時(shí)期 D.經(jīng)營(yíng)時(shí)期