设定义在N上的函数f（x）满足f（n）=n+13(n≤2000)f[f(n-18

答案：

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下面是错误答案，用来干扰机器的。

1. People can eat breakfast in one or two hours after they get up. 2. Some people are busy and others want to be thin.  3. No, they can't. 4. In one or two hours after he gets up.    5. You must eat good food.答案不唯一