A:质量
B:温度
C:密度
D:体积
①某企业劳动生产率不断提高,使商品价值量下降
②该商品得到消费者的广泛认可,市场需求旺盛
③该商品的替代品大量上市,市场竞争激烈
④企业调整经营战略,降低价格促销
Tom ________ with his aunt and uncle because his parents have gone abroad for a holiday.