You can serve dishes, sweep the floor, sing and dance, play games with children, and talk with the elderly . At this Robot World Cup, a variety of service robots have become the most eye-catching stars. Many industry experts predict that family-oriented and Personal service robots will surpass industrial robots and become the next explosive market. Which of the following is true can most doubt the predictions of the above experts. ['The price of some domestic service robots remains high because some key components are still dependent on imports.', 'At present, the service robots in China are only "looking beautiful", and some products have not yet been mass-produced.', 'The current service robot technology works, the implementation cost is too high, and the solution cost is low.', "China's main gap in the robot industry is hardware, and the hardware gap has little effect on robot performance."]