题目

根据短文理解，选择正确答案。 Whether in the home or the workplace, social robots are going to become a lot more common in the next few years. Social robots are about to bring technology to the everyday world in a more humanized way, said Cynthia Breazeal, chief scientist at the robot company Jibo. While household robots today do the normal housework, social robots will be much more like companions(同伴) than mere tools. For example, these robots will be able to distinguish when someone is happy or sad. This allows them to respond more appropriately to the user. The Jibo robot, 12．在水平地面上，工人用100N的水平推力推动重150N的箱子，4s内前进了6m，在这个过程中，工人对木箱做功为600J，木箱所受重力对木箱做功的功率为0W．