0是不是非负数..............................要有道理的..................
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0是不是非负数
..............................要有道理的.....................................................................................................................................................................................................................................................
..............................要有道理的.....................................................................................................................................................................................................................................................
![0是不是非负数..............................要有道理的..................](/uploads/image/z/17983282-58-2.jpg?t=0%E6%98%AF%E4%B8%8D%E6%98%AF%E9%9D%9E%E8%B4%9F%E6%95%B0..............................%E8%A6%81%E6%9C%89%E9%81%93%E7%90%86%E7%9A%84..................)
是