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> 一台29英寸的纯平彩电，过去卖6000-8000元，现在卖2000-3000元，这一变化的根本原因是 [ ] A．市场上彩电供过于求使其价格下跌 B．生产彩电的社会必要劳动时间降低 C．某个纯平彩电生产企业劳动生产率提高了 D．居民消费水平提高了，纯平彩电市场前景广阔

问题：

发布时间：2024-09-07

一台29英寸的纯平彩电，过去卖6000-8000元，现在卖2000-3000元，这一变化的根本原因是
[ ]
A．市场上彩电供过于求使其价格下跌
B．生产彩电的社会必要劳动时间降低
C．某个纯平彩电生产企业劳动生产率提高了
D．居民消费水平提高了，纯平彩电市场前景广阔

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