①“农为天下之本务，而工贾皆其末也”

②“农不出则乏其食，工不出则乏其事，商不出则三宝绝，虞（山泽资源）不出则财匮少”

③“待农而食之，虞（山泽资源）而出之，工而成之，商而通之。”

④“舍本逐末，贤者所非。日富岁贫，饥寒之渐，故商贾之事，阙而不录”

 根据短文内容，用方框中所给单词的正确形式填空，使短文通顺，完整，每词限用一次。

  Nowadays, there are many robots working in factories. They can help to build cars, and____  doing simple jobs over and over again. Fewer people will do such jobs in the future because they are boring, but robots will never get ____ . Some robots in Japan can walk and dance. There will be a lot____ robots in future. Some scientists believe that we can make robots move like a human and also it will be possible to make____  really think and talk like a human.. However, it may take ____  of years. The robots in the future will have many different shapes, such as humans, plants, animals and so on. Do you think you will have your own robot in the future

氯酸钾(KClO₃)可用于制取氧气，其中氯元素的化合价为 （）