A.企業(yè)內(nèi)部規(guī)模經(jīng)濟 B.企業(yè)外部規(guī)模經(jīng)濟 C.市場規(guī)模經(jīng)濟 D.國家規(guī)模經(jīng)濟 E.產(chǎn)品規(guī)模經(jīng)濟