Made of canruohanxing 灿若寒星制作2015-2016学年第二学期初一英语专题复习《阅读理解》1 (一 ) By 2055, about 40 percent of the population in Japan will be over 65 years old
Thus Japanese scientists hope that robots will be the answer to the serious question-what to do with an ageing population( 人口 )
Today, some robots are already cleaning floors in about 10 buildings around the country, including a skyscraper ( 摩天大楼 ) in central Tokyo
The robots work at night after office workers have gone home
They even take the lift to move from one floor to another
However, such robots are still rare(稀少的 ) in Japan
Japanese scientists are trying to build robots smart enough to meet the needs of the elderly( 老人 ) in the country
As Japan's population grows older and its workers are getting fewer, scientists say new types o