“人类因为懒,所以科技才会进步。”这句话出自某位企业家之口。的确,现代生活的很多产品都是在尽可能地为人们的生活提供便利,吸尘器何尝不是?人类发明家用吸尘器已经近100年了,时至今日,它仍然是人们居家生活的重要工具。悠久的历史并不代表为全世界所普及,至少在中国,2005年的时候,吸尘器的内销总量不过300万台左右,而与此同时,吸尘器的年出口总量却达到3000万台。这种情况正在发生变化,近年来中国的房地产市 “Human beings because lazy, so science and technology will be able to progress. ” This sentence comes from the mouth of an entrepreneur. Indeed, many products in modern life are designed to facilitate people’s lives as much as possible. Is not it a vacuum cleaner? Inventors have been using vacuum cleaners for nearly 100 years and are still an important tool for people’s daily lives. Long history does not mean the popularity of the world, at least in China, in 2005 when the total vacuum cleaner domestic sales of only about 3 million units, while at the same time, the total annual export volume of vacuum cleaners has reached 30 million units. This situation is changing, in recent years China’s real estate market