English Reading(初三科技类阅读)

EnglishReadingNASAonJuly24thannouncedthediscoveryofKepler-452b（开普勒-452b）,themostEarth-likeplaneteverfound.Located1,400light-yearsfromourplanet,NASAcalleditEarth2.0,becauseit'sthefirstplanetdiscoveredinthehabitablezoneofaGstarsimilartooursun.WecanthinkofKepler-452basanolder,biggercousintoEarth,providinganopportunitytounderstandandreflectuponEarth'sevolving（进化的，演变的）environment,saidJonJenkins,theKeplerdataanalysisleadatNASA'sAmesResearchCenter.“Theplanetis5percentfartherawayfromitsstarthanEarthistothesun,makingforaslightlylongeryearof385days,butgetssimilarlightbecauseitssunis20percentbrighterthanourown.Thesunshinefromthisstarwouldfeelverysimilartothesunshinefromourstar,Jenkinstoldreporters.NASAbelievestheplanethasamassaboutfivetimesmoremassivethanEarth's,witharockysurfacebelowathickeratmospherethanourown.GravitywouldbeabouttwiceasstrongonKepler-452basitisonEarth,NASAsaid.TheplanetislocatedintheKepler-452systemintheconstellationCygnus（天鹅座星系）.Itssunhasthesamesurfacetemperatureasourown,buthasadiameterthatis10percentlarger.WhileNASAscientistshavenoideaifKepler-452b'satmosphereisconducivetolife,theydoknowthattherehasbeenplentyoftimefororganisms（微生物有机体）todevelop.It'sawe-inspiringtoconsiderthisplanetspent6billionyearsinthehabitablezoneofitsstar,whichislongertheageoftheEarth,Jenkinssaid.Thatisconsiderabletimeandopportunityforlifetoarisesomewhereonitssurfaceoroceansifallthenecessaryconditionsforlifeexistonthisplanet.1.Kepler-452bis.A.asystemintheconstellationCygnusB.aplanetwhichisnotfitforlifetoariseC.astarwhichissimilartooursunD.aplanetwhichismostsimilartotheeartheverfound2.isthemostsimilartothemeaningoftheunderlinedword.A.thickB.bigC.strongD.hard3.Accordingtothepassage,whichsentenceisNOTtrue?A.Kepler-452bcanhelpustoknowhowourearthenvironmentevolved.B.Theplanet’smessisfivetimeslargerthanEarth's.C.NASAhasknownthattherearesomelivesintheplanet.D.Kepler-452bistrulyfarawayfromourearth,butit’sstillinthehabitablezoneforhumans.4.Thispassagewillprobablybereadon.A.Harper’sBazaarB.ScienceAmericanC.YouthDigestD.NationalGeographic