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人生若如初相见易连恺年夜终局是什么 在原著中为什么死了

时间:2025-05-15 11:21:20 来源:网络整理 编辑:时尚

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BEIJING,Sept.21(Xinhua)--Chineseengineershavebuiltthefirstmedium-frequencyantennaoftheSquareKilomete

BEIJING,Sept.21(Xinhua)--Chineseengineershavebuiltthefirstmedium-frequencyantennaoftheSquareKilometerArray(SKA),markingasignificantsteptowardstheconstructionoftheworld'slargestradiotelescopearray.TheantennawassetupatatestingsiteinShijiazhuang,capitalofHebeiProvince,onWednesday.ItsignifiestheleadingrolethatChinahasplayedinprovidingthecorefacilityandantennasolutionfortheSKA.SKAisanetworkofthousandsofradioantennasofvaryingtypesandsizes,locatedatseveralsitesinWesternAustraliaandSouthernAfrica.Itwillfeaturemuchhighersensitivityandsurveyspeedsthananyotherradioinstrumentdevelopedsofar.ThefirstantennawilllayatechnicalfoundationforSKA's64setsofmid-frequencyantennas,whichwillbedevelopedbyinstitutionsfromChina,SouthAfricaandItaly.Theinternationalbigscienceprojectwasjointlyfunded,builtandrunbymorethan10countries,withChinabeingoneofthesevenfoundingmembersandasignatorytotheSKAObservatoryConventionsignedin2019.Thearray'sscientificgoalsincludetheformationofthefirstlight-emittingobjectsintheuniverse,thenatureofdarkenergy,cosmicmagneticfieldandgravity,aswellasthesearchforlifemoleculesandevenextraterrestrialcivilization.Editor:DisclaimerTheviewsandopinionsexpressedinthisarticlearethoseoftheauthor's,GMW.cnmakesnorepresentationsastoaccuracy,suitability,orvalidityofanyinformationonthissiteandwillnotbeliableforanyerrors,omissions,ordelaysinthisinformation.
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