Howmuchsleepdoweneed的精選

問題詳情：Howmuchsleepdoweneed?Wearealldifferent.Somepeopleneedonlythreehoursofsleepanight.Othersneedtenhoursofsleepanight.MostAmericanssleepanaverage(平均)ofseventoeighthoursanight.Aftertheageoffifty,t...

問題詳情：   Howmuchsleepdoweneed?Wearealldifferent.Somepeopleneedonlythreehoursofsleepanight.Othersneedtenhoursofsleepanight.MostAmericanssleepanaverage(平均)ofseventoeighthoursanight.Aftertheageoff...