A.規(guī)模經(jīng)濟(jì)和學(xué)習(xí)經(jīng)濟(jì)同方向變動
B.在勞動密集型產(chǎn)業(yè)中，學(xué)習(xí)經(jīng)濟(jì)很小，規(guī)模經(jīng)濟(jì)很大
C.在資本密集型產(chǎn)業(yè)中，規(guī)模經(jīng)濟(jì)很小，學(xué)習(xí)經(jīng)濟(jì)很大
D.規(guī)模經(jīng)濟(jì)和學(xué)習(xí)經(jīng)濟(jì)交叉的影響產(chǎn)品成本的降低