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1、陕西山阳县2016高考英语阅读理解二轮联练题及答案阅读理解。WhylaughtermattersAlthoughmostpeoplebelievethatlaughterisoneofthenature'sgreattreatmentsforawholerangeofmentalandphysicaldiseases,itisstillaseriousscientificsubjectthatresearchersaretryingtofigureout.uLaughteraboveallelseisas
2、ocialthing,”saysBaltimoreneuroscientist,RobertProvine,whohasstudiedlaughterfordecades.“Alllaughtergroupslaugh4hahaha,basicallythesameway.WhetheryouspeakMandarin,FrenchorEnglish,everyonewillunderstandlaughte匚Thereisapatterngenerator（发生器）inourbrainthatprodu
3、cesthissound."Laughingisourfirstwayofcommunicating.Babieslaughlongbeforetheyspeak.Nooneteachesthemhowtolaugh.Theyjustdo.Peoplemaylaughatapcmk（恶作剧）onAprilFools'Day.Butsurprisingly,only10to15percentoflaughteristheresultofsomeonemakingajoke.Laughterismostlya
4、boutsocialresponsesratherthantoajoke・Deafpeoplelaughwithouthearingandpeopleoncellphoneslaughwithoutseeing,showingthatlaughterisnrtdependentonsinglesensebutonsocialinteractions.Andlaughterisnotjustathingofpeople・Chimpstickle（挠痒）eachotherandevenlaughwhenano
5、therchimppretendstoticklethem.JaakPanksepp,aBowlingGreenUniversityPsychologyprofessor,studiesratsthatlaughwhenheticklesthem.Itturnsoutratslovetobetickled—theyreturnagainandagaintothehandsofresearchersticklingthem.Bystudyingrats,scientistscanfigureoutwhat'
6、sgoingoninthebrainduringlaughter.NorthwesternUniversitybiomedicalengineeringprofessor,JeffreyBurgdorfhasfoundthatlaughterinratsproducesachemicalthatactsasanarnidepressant（抗扌卬郁药）.Hethinksthesamethingprobablyhappensinhumans,too.Thiswouldgivedoctorsanewchemi
7、caltargettodevelopdrugsthatcanfightdepression.Evenso,laughteritselfhasnotbeenprovedtobethebestmedicine,expertssay.MargaretStuber,aprofessoratUniversityofCalifornia,studiedwhetherlaugherhelpedpatients.Shefoundthatdistraction（分，4）andmoodimprovementhelped,bu
8、tshecouldnotfindabenefitoflaughteralone・“Nostudyhasshownthatlaughterproducesadirecthealthbenefit,”Provinesaid,largelybecauseit'shardtoseparatelaughterfromjustfeelinggood・Buthethinksitdoesn'treallymatter,“Isn'tthefac
