![Aboutacenturyago,theaveragelife-span(壽命)forAmericanswas...]( "Aboutacenturyago,theaveragelife-span(壽命)forAmericanswas...")
- 問題詳情：Aboutacenturyago,theaveragelife-span(壽命)forAmericanswasabout50years.Today,thetypicalAmericanlivesforaroundseventy-eightyears.AccordingtoaGermanagingstudy,themaximumlifespaninindustrializedcountrieshasincreasedbytwoyearseverydecadesincethemi...
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