Doctorssayyouhadbett的精选

问题详情：   Doctorssayyouhadbetteruseitbeforeyouloseit.Themoreyousiteachday,themorechanceyouhaveofgettingsick.RichardRosenkranzofKansasStateUniversitywasamongtheresearchers.Hesaidpeoplewhosatforlong...