对我国青少年来说,如何让青博会上的创新理念和梦想持续地对他们影响下去,这才是最重要的。目前上海地铁使用各类自动扶梯1700多台,这些每天承载上百万人流量的自动扶梯卫生程度如何,扶手上的细菌怎样消除性价比最高?日常生活中经常有水龙头没关紧,或者水龙头漏水的情况发生,如何才能最大限度地减少自来水的流失?人的行走本身就产生机械能,那么能 To the young people in our country, it is of the utmost importance how to let the innovative ideas and dreams on the Green Expo continue to influence them. At present, the Shanghai Subway uses more than 1,700 escalators of various types. How do these escalators, which carry millions of people daily, have the highest level of cost-effectiveness? How often does it cost you to have a tap in your daily life? What happens, how can we minimize the loss of tap water? Human walking produces mechanical energy itself, so can