题目

阅读理解 The new social robots,including Jibo, Cozmo, Kuri and Meccano M.A.X., bear some similarities toassistants like Apple's Siri, but these robots come with something more. Theyare designed to win us over not with their smarts but with their personality.They are sold as companions that do more than talk to us. Time magazine cheeredfor the robots that could fundamentally reshape how we interact withmachines. But is reshaping how we interact with machines a good thing,especially for children? Some researchers in favorof the robots don't see a problem with this. People have relationships 当x____________时，分式的值为正数.