领域：中青网
介绍：2019-07-0309:52这是中华全国台湾同胞联谊会2019年台胞青年千人夏令营开营仪式上举行的授旗仪式（7月2日摄）。...
领域：有问必答
介绍：PhototakenonMay,2013showstheASgammaExperimentinYangbajain,southwestChinaeredthehighestenergycosmicgammarayseverobservedfromanobservatoryinTibet,openinganewwindowtoexploretheextremeuniverse.(TheInstituteofHighEnergyPhysicsoftheChineseAcademyofSciences/HandoutviaXinhua)BEIJING,July3(Xinhua)--AjointresearchteammadeupofChineseandJapanesescientistshasdiscoveredthehighestenergycosmicgammarayseverobservedfromanobservatoryinTibet,,equivalentto45billiontimesoftheenergyofX-raysformedicaldiagnosis,researchersfromtheInstituteofHighEnergyPhysicla,afamoussupernovaremnantintheconstellationTaurus,about6,,thehighestenergyeverobservedforagamma-rayphotonwas75TeV,whichwasdetectedbytheHEGRACherenkovtelescopeinGermany."Beforethisdiscovery,manyscientistsbelievedthatphotonscouldnotbeacceleratedtoenergyhigherthan100TeV,"saidHuangJing,aresearcherfromIHEP,andtheco-spokespersonfortheexperiment."Thediscoveryisamilestoneinthesearchfortheoriginofthemysteriouscosmicrays,"saidProfessorChenYang,ergygammarays:first,theelectronsareaccelerateduptoPeV(onethousandtrillionelectronvolts)inthenebula;thenthePeVelectronsinteractwiththecosmicmicrowavebackgroundradiation(CMBR),theremnantradiationfromtheBigBangfillingthewholeuniverse;,whichwasrecordedinofficialhistoricaldocumentsoftheNorthernSongdynasty(960-1127).In1969,scientistsdiscoveredapulsar,rotating30timespersecond,,theCrabNebulahasbeenobservedatallelec,locatedintheYangbajingtownofTibetatanaltitudeof4,300meters,,,andthusimprovethesensitivitysignificantly,,atotalof24gamma-rayphotonsabove100TeVhavebeendetectedfromtheCrabNebula,asaresultoftheinnovativeupgradingoftheexperiment,accordingtoHuang.",andgammarayswithenergiesuptoafewhundredTeVreallyexist,"Huangsaid."Thispionofvery-high-energycosmicrays,,weexpecttoidentifytheoriginofcosmicraysinourGalaxy,"
仲夏时节，在重庆忠县新立镇中岭社区出现水稻拼成的“笑脸”“橘子”等图案，成为一道靓丽的乡村田园风景线。【阅读全文】
” 中欧海空铁以外的新运输方式 从谋篇布局的“大写意”跨入精谨细腻的“工笔画”，“一带一路”建设一步步走深走实。【阅读全文】
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四川凉山彝族自治州美姑县马依村，地处高半山区，交通不便，自然资源匮乏，贫困发生率近40%，是大凉山最典型的深度贫困村。【阅读全文】
我们要正确认识坚持对外开放基本国策的重要意义，把党中央促进更高水平对外开放战略部署落实到位。【阅读全文】
光明日报创刊于1949年6月16日，是中共中央主办，以知识分子为主要读者对象的思想文化大报。【阅读全文】
2019-07-0309:53四川凉山彝族自治州美姑县马依村，地处高半山区，交通不便，自然资源匮乏，贫困发生率近40%，是大凉山最典型的深度贫困村。【阅读全文】
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