阅读理解It’struethatteensdon’tgete-查字典问答网
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  阅读理解It’struethatteensdon’tgetenoughsleep,butchangingtheschoolstartingtimewouldhaveachaoticeffectandthroweveryoneoffbalance.Scientistshaveshownthatteensaremoreactivelateratnightth

  阅读理解

  It’struethatteensdon’tgetenoughsleep,butchangingtheschoolstartingtimewouldhaveachaoticeffectandthroweveryoneoffbalance.

  Scientistshaveshownthatteensaremoreactivelateratnightthanchildrenandadults,somost

  teensareprobablystayinguplaterforwhateverreasons.“Theresearchersmeasuredthepresenceofthe

  sleeppromotinghormone(荷尔蒙)inteenagers’saliva(唾液)atdifferenttimeoftheday.Theylearned

  thatthehormonelevelsriselateratnightthantheydoinchildrenandadults-andremainatahigherlevel

  laterinthemorning.Measuringthehormoneinthesalivaisagoodwaytoshowthatmostteenshave

  sleepproblems,butchangingschoolschedulesisn’tthebestwaytofixthis.Mostpeoplearguingagainst

  changingschoolscheduleswouldsaythatitwouldonlycauseteenstostayupandwakeuplater,thus

  leavingthemwiththesameproblem.

  Thebiggestproblemschoolswouldcomeacrossfromchangingtheirscheduleswouldbetheafter

  schoolandjobconflictsstudentsandteacherswouldmeet.“Teachersreportedthatstudentsweremore

  alert,andresearchshowedthatafterschoolsportsandjobswouldsuffer.Studentsinthatareamighthavebeenabletodealwithlesstimeforjobsandsportssomehow,butsomeofthemhavepracticeandearlierplansthatwouldbecomeconflictedifthischangeweretooccur.Moststudentsrarelyhavetimetoplaya

  sportanddohomeworkbefore9or10o’clock.Openingschoolslatermayhaveworkedforsomeareas,buttherealityisoftenverydifferent.

  1.Themeaningoftheunderlinedword“chaotic”inthe1stparagraphiscloseto________.

  A.positive

  B.apparent

  C.negative

  D.ambiguous

  2.Mostteenshavesleepproblemsbecause________.

  A.theyaremoreactivethanchildrenandadults

  B.schoolworktakesupmostoftheirtime

  C.theirhormonelevelsarehigherlateratnight

  D.theyprobablylikestayingupfornoreason

  3.WhichofthefollowingisTRUEaccordingtothepassage?

  A.Therearemanyconflictsbetweenstudentsandteachers.

  B.Someo

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