依据如图所示的“处在磁场中的通电金属棒在导轨上运动”这一实验现象及相应规律设计的家用电器是（   ）

2012年9月25日我国首艘航母“辽宁舰”正式服役．可控核反应堆是驱动航空母舰的理想设备，其工作原理是利用重核裂变反应释放出大量核能获得动力.₉₂²³⁵U+n→ Ba+ Kr+yX是若干核反应的一种，其中n为中子，X为待求粒子，y为X的个数，则X是____（填“质子”“中子”或“电子”），y=____．

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    In some science fiction movies，the robots are just like humans. They help with the housework and do the most 1 jobs.

    Some scientists believe that there will be such robots in the future.2, they agree it may 3hundreds of years. Scientists are now trying to make robots 4people and do the same things as us.

    But robot scientist James White 5. He thinks that it will be 6 for a robot to do the samethings as a person. 7 , it's easy for children to wake up and know where they are. Mr White thinks that robots won't be able to do this. But other scientists disagree. They think that robots will be able to talk to people 8 25 to 50 years.

    Robot scientists are not just trying to make robots look like people. For example, there are already robots 9 in factories. They do simple jobs over and over again. People would not like to do such jobs and would get bored. But robots will 10 get bored.

    In the future，there will be more robots everywhere，and humans will have 11 work to do. New robots will have many different 12. Some will look like humans, and 13 might look like snakes. After anearthquake（地震），a snake robot could help look for people under buildings. That may not seem possible now, but computers, space rockets and even electric tooth brushes 14 impossible a hundred years ago. We never know 15 will happen in the future!