A.集群效應(yīng) B.規(guī)模效應(yīng) C.增值效應(yīng) D.經(jīng)驗(yàn)效應(yīng)
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A.經(jīng)驗(yàn)效應(yīng) B.集群效應(yīng) C.規(guī)模效應(yīng) D.范圍效應(yīng)