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1、EnglishReadingNASAonJuly24thannouncedthediscoveryofKepler-452b（开普勒-452b）,themostEarth-likeplaneteverfound.Located1,400light-yearsfromourplanet,NASAcalleditEarth2.0,becauseitsthefirstplanetdiscoveredinthehabitablezoneofaGstarsimilartooursun.WecanthinkofKepler-452basanolder,biggercousintoEarth,providi
2、nganopportunitytounderstandandreflectuponEarthsevolving（进化的,演变的）environment,saidJonJenkins,theKeplerdataanalysisleadatNASAsAmesResearchCenter.“Theplanetis5percentfartherawayfromitsstarthanEarthistothesun,makingforaslightlylongeryearof385days,butgetssimilarlightbecauseitssunis20percentbrighterthanour
3、own.Thesunshinefromthisstarwouldfeelverysimilartothesunshinefromourstar,Jenkinstoldreporters.NASAbelievestheplanethasamassaboutfivetimesmoremassivethanEarths,witharockysurfacebelowathickeratmospherethanourown.GravitywouldbeabouttwiceasstrongonKepler-452basitisonEarth,NASAsaid.Theplanetislocatedinthe
4、Kepler-452systemintheconstellationCygnus（天鹅座星系）.Itssunhasthesamesurfacetemperatureasourown,buthasadiameterthatis10percentlarger.WhileNASAscientistshavenoideaifKepler-452bsatmosphereisconducivetolife,theydoknowthattherehasbeenplentyoftimefororganisms（微生物有机体）todevelop.Itsawe-inspiringtoconsiderthispla
5、netspent6billionyearsinthehabitablezoneofitsstar,whichislongertheageoftheEarth,Jenkinssaid.Thatisconsiderabletimeandopportunityforlifetoarisesomewhereonitssurfaceoroceansifallthenecessaryconditionsforlifeexistonthisplanet.1. Kepler-452bis.A. asystemintheconstellationCygnusB. aplanetwhichisnotfitforl
6、ifetoariseC. astarwhichissimilartooursunD. aplanetwhichismostsimilartotheeartheverfound2. isthemostsimilartothemeaningoftheunderlinedword.A. thickB.bigC.strongD.hard3. Accordingtothepassage,whichsentenceisNOTtrue?A. Kepler-452bcanhelpustoknowhowourearthenvironmentevolved.B. TheplanetsmessisfivetimeslargerthanEarths.C. NASAhasknownthattherearesomelivesintheplanet.D. Kepler-452bistrulyfarawayfromourearth,butitsstillinthehabitablezoneforhumans.4. Thispassagewillprobablybereadon.A.HarpersBazaarB.ScienceAmericanC.YouthDigestD.NationalGeographic
