bats are impressive creatures. they are known to carry 阅读理解答案

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1、Batsareimpressivecreatures.Theyareknowntocarry阅读理解答案　　Batsareimpressivecreatures.TheyareknowntocarrydangerousdiseaseslikeSARSwithoutgettingsick.　　Soresearcherswantedtoknow:HowdobatsfightoffsomanydeadlydiseasesLearningtheirsecretcouldhelpdoctorsbettertreathumanswhohavethesediseases,theref

2、oresavingmillionsoflives.　　Tosolvethisproblem,ateamofresearchersfromAustraliaandChinaanalyzedbatDNA.Thescientistsstudiedtwokindsofbats—theAustralianmegabat,knownastheflyingfox,andtheChinesemicrobat.Thescientiststhenarrangedthebatgenome(基因组)inorderbycomparingtheirDNA.　　Theresearchersnowth

3、inkthatthespecialimmunity(免疫性)toillnessthatbatshavemaybeconnectedtotheirabilitytofly.　　Batsaretheonlymammals(哺乳动物)thatcantrulyfly.Flyingusesupalotofenergy.Theenergyburnedforflyingproducessomethingintheanimalcalledfreeradicals(自由基).FreeradicalscandamageDNAandleadtodiseasessuchascancer.　　H

4、owever,batsarenotaffectedbyfreeradicalsproducedduringflight.ThereasonisthatbatscarryspecialgenestorepairanydamagedDNA.　　Scientiststhinkthatbecausebatsflyandproducefreeradicals,they’veevolvedtocarrygenesthatshapedtheirspecialimmunesystem.　　“We’rethinkingthattheevolutionofflightledtoasorto

5、feffect,influencingnotonlytheimmunesystembutalsothingslikeagingandcancer,”saysChrisCowled,oftheAustralianAnimalHealthLaboratory.“Wethinkwe’vereallyfoundsomethingspecial.”　　Researchersbelievethatthisdiscoverymightonedaybekeytohelpinghumansfightdiseasessuchascancerthatattacktheimmunesystem

6、anddamageDNA.　　44.What’strueaboutbatsaccordingtothepassage　　A.TheycarrymanydeadlydiseaseslikeSARSsoit’seasyforthemtogetsick.　　B.Batsaretheonlyanimalsthatcantelldirectionseasily.　　C.Batsareamongthemammalsthatcantrulyfly.　　D.Researchersstudiedbatstohelpsavepeople.　　45.Accordingtoresearcher

7、s,batscanfightoffmanydeadlydiseasesmainlybecause________.　　A.theyhavedevelopedspecialimmunesystemthroughevolution　　B.theyareabletofly,whichburnsalotofenergy　　C.freeradicalsintheirbodiescandamageDNAandcausediseases　　D.theycarrynospecialgenestorepairdamagedDNA　　46.Thepassag