Unit2Sportsevents课时练12篇阅读＋1篇完形阅读理解A(2023年·亳州联考)Runningisoftentiringandalotofhardwork,butnothingbeatsthefeelingyougetafterfinishingalongworkoutaroundthetrack.Butwhileit’slongbeenbelievedthatendorphins(内啡肽)—chemicalsinthebodythatcausehappiness—arebehindthesocalled“runner’shigh”，astudysuggestedthattheremaybemoretothisphenomenonthanwepreviouslyknew.AccordingtoarecentstudypublishedbyagroupofscientistsfromseveralGermanuniversities,agroupofchemicalscalledendocannabinoids(内源性大麻素)mayactuallyberesponsibleforthisfamiliargreatfeeling.Totestthistheory,thescientiststurnedtomice.Bothmiceandhumansreleasehighlevelsofendorphinsandendocan...
