思维跳跃够快的,从帕格尼尼一下跳到这,跟不上节拍。
这是个分段函数,你实际上已经给出答案:年轻时25:75,中年50:50,老年后75:25
所有跟帖:
• 年龄,收入,社会层次,受教育程度都有关系,而且人也会成长 -tgmomtobe- ♀ (164 bytes) () 10/12/2018 postreply 20:14:41
• 年龄,收入,社会层次,受教育程度都有关系,而且人也会成长 -tgmomtobe- ♀ (164 bytes) () 10/12/2018 postreply 20:14:41
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