【Whydomendieearlierthanwomen?Thelatestresearchmakesitknownthatthereasoncouldbethatmen’sheartsgointorapiddeclinewhentheyreachmiddleage.Thelateststudyoftheeffectsofageingonthehearthasfoundthatwomen’sl】

　　Whydomendieearlierthanwomen?Thelatestresearchmakesitknownthatthe

　　reasoncouldbethatmen’sheartsgointorapiddeclinewhentheyreachmiddleage.

　　Thelateststudyoftheeffectsofageingonthehearthasfoundthatwomen’slongevitymaybelinkedtothefactthattheirheartsdonotlosetheirpumpingpowerwithage.

　　“Wehavefoundthatthepowerofthemaleheartfallsby20-25percentbetween18and70yearsofage,”saidtheheadofthestudy,DavidGoldspinkofLiverpoolJohnMooresUniversityintheUK.

　　“Withinthehearttherearemillionsofcellsthatenableittobeat.Betweentheageof20and70,one-thirdofthosecellsdieandarenotreplacedinmen,”saidGoldspink.“Thisispartoftheageingprocess.”

　　Whatsurprisesscientistsisthatthefemaleheartseesverylittlelossofthesecells.Ahealthy70-year-oldwoman’sheartcouldperformalmostaswellasa20-year-oldone’s.

　　“Thisgenderdifferencemightjustexplainwhywomenlivelongerthanmen,”saidGoldspink.Theystudiedmorethan250healthymenandwomenbetweentheagesof18and80,focusingonhealthypersonstoremovetheconfusinginfluenceofdisease.“Theteamhasyettofindwhyageingtakesagreaterlossonthemaleheart,”saidGoldspink.

　　Thegoodnewsisthatmencanimprovethehealthoftheirheartwithregularexercise.Goldspinkstressedthatwomenalsoneedregularexercisetopreventtheirlegmusclesbecomingsmallerandweakerastheyage.

　　小题1:Thetextmainlytalksabout________. A．men’sheartcellsB．women’sageingprocessC．thegenderdifferenceD．heartsandlonglife小题2:Accordingtothetext,theUKscientistshaveknownthat________. A．womenhavemorecellsthanmenwhentheyarebornB．womencanreplacethecellsthatenablethehearttobeatC．thefemaleheartlosesfewofthecellswithageD．womenneverlosetheirpumpingpowerwithage小题3:Wecanknowfromthepassagethat________.A．thereasonwhyageingtakesagreaterlossonthemalehearthasbeenfoundoutB．scientistsareonthewaytofindingoutwhythemaleheartlosesmoreo