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2019-2020年高考英语一轮复习Unit2Workingtheland单元检测卷新人教版必修Ⅰ.阅读理解Asimplehalf-hourdelayinhighschoolstarttimeledtoasignificantimprovementinstudents’moodalertnessandmotivationandincreasedtheiraveragesleeptimeduringtheweekaccordingtoanewstudy.JudithA.OwensMDMPHattheHasbroChildren’sHospitalinProvidenceR.I.andcolleaguesstudied201studentsingradesninethrough12attendingaRhodeIslandhighschoolwheretheclassstarttimewaschangedfrom8a.m.to8:30a.m.foratwo-monthperiod.Studentspletedonlinesurveysbeforethechangeinclasstimeandthenafter.Owensandherteamfoundthat:★Thepercentageofstudentsgettinglessthansevenhoursofsleeppernightdroppedby
79.4%.★Studentsreportingatleasteighthoursofsleeppernightincreasedfrom
16.4%atthestartofthestudyto
54.7%aftertwomonths.★Thepercentageofstudentswhoreportedfeelingatleastsomewhatunhappyordepresseddroppedfrom
65.8%to
45.1%.★Thepercen...。