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最佳答案:As the development of medicine,average human life can reach 120 years old.
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最佳答案:It is said that the average life expectancy will be as long as 120 years after 5
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最佳答案:相对有些人是这样的. 不过世界人口将大大提高 .青年人压力大,老年人死不了. 小孩还要照顾 .估计 .