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1、Unit4Astronomythescienceofthestars一、阅读理解。TheInternetplaysabigpartinhumanlife.Weuseitforworkandentertainment.WecanfindnewrecipesontheInternetoradviceonstayinghealthy.Wecanevenuseittolearnanewlanguage.WeusetheInternettoconnectwithfamilyandfriendsandstayintouchwithi
2、ssueswecareabout.Thelistgoesonandon.AsfarastheInternetbeingapartofourlives—well,thattrainhasleftthestation.Thatexpressionmeansthereisnogoingback.Ifyoupreferboating,youcansaythatshiphassailed.So,theremaybenogoingbacktoanInternet-freelife.ButcanusingtheInternettoom
3、uchbebadforourhealth?Itmightbe,sayresearchers.Studyresultsshowthatteenswhospendatleast14hoursaweekonlineweremorelikelytohavehighbloodpressure.Highbloodpressuremakesyourheartandbloodvesselsworktoohard.Overtime,thisextrastrainincreasesyourriskofaheartattackorstroke
4、.Highbloodpressurecanalsocauseheartandkidneydisease.Itisalsocloselylinkedtosomeformsofdementia,abraindisease.Dementiaismarkedbymemorydisorders,personalitychanges,andareducedabilitytoreason.Let’sintroducesomethingaboutthestudyofit.TheHenryFordHospitalinDetroit,Mic
5、higandidthestudy.Itinvolved335youngpeople,from14to17yearsold.Onehundredthirty-fouroftheteensweredescribedas“heavyInternetusers”.Researchersfoundthatoutofthese134teens,26hadhighbloodpressure.Theresearcherssaythestudyisthefirsttoconnectheavywebuseandhighbloodpressu
6、re.OtherresearchhasconnectedthatheavyInternetusewithhealthproblemsincludinganxiety,depressionandobesity.TheleadresearcherofthestudyisAndreaCassidy-Bushrow.Inastatementshesaid,“UsingtheInternetispartofourdailylifebutitshouldn’tconsumeus.”Forthepurposeofthestudy,sh
7、eexplains,teensconsideredheavyInternetuserswereonlineon“average25hoursaweek.”MsCassidy-Bushrowaddsthatitisimportantforteenstotake“regularbreaksfromtheirputersorsmartphones”andtodosome“kindofphysicalactivity.”Shealsosuggeststhatparentslimittheirchildren’suseoftheI
8、nternettotwohoursaday,fivedaysaweek.【文章大意】互联网如此有用并且融入我们的生活,但过度使用它,会导致多种健康问题。1.Thefirsttwoparagraphsmeanthat________.A.thelistofthefunctionoftheInternetistoolon
