受经济下行,劳动力成本上升、产品价格下降等因素影响,某企业通

受经济下行,劳动力成本上升、产品价格下降等因素影响,某企业通过缩减生产、大量裁员,引进“机器人”作业,经济效益不断回温。这表明( 

①价格变动会受供求关系的影响        ②产品创新可推动企业升级换代

③价格变动调节生产要素的投入        ④科技进步能增强企业竞争优势

A.①②       B.①③       C.②④       D.③④

答案

D

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