送交者: HunHunSheng 于 2006-1-09, 16:04:16:
回答: US life expectancy is now 77. What was it 50 years ago? 由 Enlighten 于 2006-1-09, 16:00:41:
A significant portion of people here will die before 2030, a great portion before 2040, the majority before
2050 and very few will see 2060.