![Howmuchsleepdoweneed?Wearealldifferent.Somepeopleneedon...]( "Howmuchsleepdoweneed?Wearealldifferent.Somepeopleneedon...")
- 问题详情：Howmuchsleepdoweneed?Wearealldifferent.Somepeopleneedonlythreehoursofsleepanight.Othersneedtenhoursofsleepanight.MostAmericanssleepanaverage(平均)ofseventoeighthoursanight.Aftertheageoffifty,theaveragesleeptimegoesdownto6.5hoursaday.Mostpeopl...
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