The team's data only went up to 2007, but the researchers also explored what would happen if consumers replaced old products with newelectronics that serve more than one function, such as a tablet for word processing and TV viewing.
研究小组的数据只持续到2007年, 但研究人员也探讨了如果消费者用提供多种功能的新电子产品(比如用于文字处理和看电视的平板电脑)取代旧产品会发生什么。
2018全国卷