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                          刘欢夺冠歌曲甄嬛

                          2019-04-16 18:27:36 来源:甘肃新闻网

                          现有4G手机可以用5G网络吗

                          U.S.PresidentDonaldTrumpsaidFridayattheWhiteHousethattheU.S.governmentwouldfreeupmuchwirelessspectrumandbuildbetterinfrastructuretotakealeadershipin5G,thenext-generationwirelessnetwork.Itcameafterthecountry'sFederalCommunicationsCommission(FCC)announcedFridayaplantostartlargestspectrumauctionandspendover20billionU.S.dollarsforruralhigh-speedinternet.FCCchairmanAjitPaisaidthatAmericanwirelesscarrierswouldbebiddingforasmuchas3.4gigahertzof"millimeter-wave"spectrumstartingonDec.10thisyear.Verizon,oneofAmerica'slargesttelecommunicationscompanies,announcedonApril3theofficialoperationofitscommercial5GnetworkintwoAmericancities,makingittheworld'sfirstcommercial5Gmobileserviceforcustomerswith5G-equippedsmartphones.WhiletheUnitedStatesleadsinsomekey5G-readinessmetrics,Chinaandothercountriesareaheadinmakingcriticalmid-bandspectrumavailablefor5G,accordingtoareportmadeinAprilbyCTIA,atradeassociationrepresentingtheU.S.wirelesscommunicationsindustryandcompaniesthroughoutthemobileecosystem.Themillimeter-wavespectrumorhigh-bandspectrumtobeauctionedoffreferstofrequenciesabove24GHz.Itscapacityishigherbutitscoveragelowerthanthemid-bandspectrum.Sothemid-bandspectrumcantravelfartoprovidebroaderservicethanthehigh-bandspectrum.Anotherchallengefor5Gserviceisthecountry'sweakerinfrastructureinruralareas,accordingtotheCTIAreport.Trumpsaidthe5GindustryintheUnitedStateswouldbe"privatesector-drivenandprivatesector-led,"sotheU.S.governmentdoesnothavetospendlotsofmoney.ButtheFCCunveiledaplantoprovide20.4billionU.S.dollarsinthecomingdecadetoconnectupto4millionruralhomesandsmallbusinessestohigh-speedinternet.ThisispartofFCC'sthree-part5GFastPlan,namely,spectrumfreeing-up,smallantennasinstallmentanddeploymentofopticalfiber,accordingtoPai.Trumpdescribedinhisspeechthebuildingof5Gservicearacethat"Americamustwin,"and"willwin."ButFCCCommissionerJessicaRosenworcelsaidinherTwitteraccountonFriday,"fromimposingtariffson5Gequipmenttoalienatingallieson5Gsecuritytofallingbehindtherestoftheworldoncriticalmid-bandspectrum,"theTrumpadministrationhasyettoofferaworkableplanforU.S.leadership."SofarthisAdministration'sinterventionson5Ghavedonemoreharmthangood,"saidRosenworcel. AviewoftheuniqueYadanlandformsintheMoguicheng(MonsterCity)scenicspotatDunhuangCity,NorthwestChina'sGansuProvince,inApril2019.Photographyloversflocktoscenicareatakephotosofthedrylandscapeerodedbywind.(Photo:ChinaNewsService/WangBinyin)AviewoftheuniqueYadanlandformsintheMoguicheng(MonsterCity)scenicspotatDunhuangCity,NorthwestChina'sGansuProvince,inApril2019.Photographyloversflocktoscenicareatakephotosofthedrylandscapeerodedbywind.(Photo:ChinaNewsService/WangBinyin)AviewoftheuniqueYadanlandformsintheMoguicheng(MonsterCity)scenicspotatDunhuangCity,NorthwestChina'sGansuProvince,inApril2019.Photographyloversflocktoscenicareatakephotosofthedrylandscapeerodedbywind.(Photo:ChinaNewsService/WangBinyin)AviewoftheuniqueYadanlandformsintheMoguicheng(MonsterCity)scenicspotatDunhuangCity,NorthwestChina'sGansuProvince,inApril2019.Photographyloversflocktoscenicareatakephotosofthedrylandscapeerodedbywind.(Photo:ChinaNewsService/WangBinyin)AviewoftheuniqueYadanlandformsintheMoguicheng(MonsterCity)scenicspotatDunhuangCity,NorthwestChina'sGansuProvince,inApril2019.Photographyloversflocktoscenicareatakephotosofthedrylandscapeerodedbywind.(Photo:ChinaNewsService/WangBinyin) SwansareseenatashoaloftheYellowRiverinHangjinBanner,northChina'sInnerMongoliaAutonomousRegiononApril2,2019.(Xinhua/LiuLei)SwansareseenatashoaloftheYellowRiverinHangjinBanner,northChina'sInnerMongoliaAutonomousRegiononApril2,2019.(Xinhua/LiuLei)SwansflyaboveashoaloftheYellowRiverinHangjinBanner,northChina'sInnerMongoliaAutonomousRegiononApril2,2019.(Xinhua/LiuLei)SwansflyaboveashoaloftheYellowRiverinHangjinBanner,northChina'sInnerMongoliaAutonomousRegiononApril2,2019.(Xinhua/LiuLei)SwansareseenatashoaloftheYellowRiverinHangjinBanner,northChina'sInnerMongoliaAutonomousRegiononApril2,2019.(Xinhua/LiuLei)SwansareseenatashoaloftheYellowRiverinHangjinBanner,northChina'sInnerMongoliaAutonomousRegiononApril2,2019.(Xinhua/LiuLei) ResidentswalkinSanlihearea.(Photo/Xinhua)It'sasifyouarewalkingintoasceneoneusuallyseesinregionssouthoftheYangtzeRiver.YetitistuckedawayinthecoreofChina'scapitalcity.TheSanliheareaofBeijing'sDongchengdistricthasaddedauniquewaterscenetoitsurbanlandscape.Greenlawns,toweringwillows,redfloweringplumsandyellowforsythiablossomslineeachsideofa900-meter-longriver.It'spicture-perfect.Afewstepsawayisaclusteroftraditionalhutongbuildingsfeaturinggraytilesandwalls.Greenstoneslabsconnecteverythingandallowvisitorstomeanderthroughthearea.Pavilionsandstonebenchesemergefromhereandthere,offeringpeopleaplacetorest.ItmightbethebestplacetoenjoynaturewhilesavoringtraditionalBeijing."Everythingchangedwhentherivercameintoplace,"saidZhangJunyi,whohasbeenlivingintheneighborhoodfor69years."Itusedtobearesidentialarea,andnoonewouldconsidertakingawalkhere."TheSanliheareahadariverbackinthemid-15thcentury,whenlocalsbuilthouses,atheaterandguildhallsalongtheriver.However,theriverwasremovedasnewfloodchannelsweredevelopedandasthepopulationgrew,especiallysincethelateQingDynasty(1644-1911).InAugust2016,thelocalgovernmentbegantorestoretherivertoitshistoricallocationandintegrateitssurroundingswithhutongandnaturalelements.Bigtrees,suchascentury-oldfragrantcedars,havebeenretained,alongwithhand-operatedstonemills,whichwerescatteredalongtheriverbankandweredugupduringtheproject,saidLiJun,generalmanagerofTianjieGroup,whichisinchargeofthedevelopment.Allhistoricalbuildingswerekeptinplaceduringtherestoration.Everything,fromoldbrickstogateposts,stonesandwoodenitems,werepreserved,providedtheycouldbeofsomeuse,Lisaid.Eventhestonesforwalkwaysareartifactsfromoldtimes.TheprojectlastedeightmonthsandtheareaopenedtothepublicinMay2017.Atthesametime,biologicallyactivatedcarbon,anecologicalfloatingislandandaerationarebeingusedintherivertoensurewaterquality.Lotusflowerswereplantedtoaddspicetothelandscape,whilepurifyingthewater.Andthreeundergroundreservoirscollectrainwatertosupplementwaterfromtheriver."Therivercansustainwaterforayeariftherearethreerains,"Lisaid.TheSanliheprojectispartoftheprotectionandrestorationplanfortheeasternpartoftheQianmenarea.Theeasternpartcovers58.6hectaresandmostlyservesasaresidentialarea.Ithaswitnessedalotofchangebutisstillconnectedtotraditionalcultureofthecity,includingcommerce,folkcustomsandopera.Theplanofficiallykickedoffin2005andhasaimedatprotectinglocalantiquesandculturalheritage,andimprovinglocallivingconditions.Zhang,thelongtimeresident,comesforawalkwheneverhehastime."Itjustputsyouinagoodmoodwhenyouseethebeautifulscenery,"hesaid. Computer-integratedaerialphototakenonMarch26,2019showsthenightviewatthesiteoftheInternationalHorticulturalExhibition2019BeijingChina(Expo2019Beijing)inYanqingDistrictofBeijing,capitalofChina.The2019BeijingInternationalHorticulturalExhibitionisslatedtokickoffonApril29,2019.(Xinhua/WangJianhua)AerialphototakenonMarch26,2019showsthenightviewofChinaPavilionoftheInternationalHorticulturalExhibition2019BeijingChina(Expo2019Beijing)inYanqingDistrictofBeijing,capitalofChina.The2019BeijingInternationalHorticulturalExhibitionisslatedtokickoffonApril29,2019.(Xinhua/WangJianhua)AerialphototakenonMarch26,2019showsthenightviewatthesiteoftheInternationalHorticulturalExhibition2019BeijingChina(Expo2019Beijing)inYanqingDistrictofBeijing,capitalofChina.The2019BeijingInternationalHorticulturalExhibitionisslatedtokickoffonApril29,2019.(Xinhua/ZhangChenlin)AerialphototakenonMarch26,2019showsthenightviewofChinaPavilionoftheInternationalHorticulturalExhibition2019BeijingChina(Expo2019Beijing)inYanqingDistrictofBeijing,capitalofChina.The2019BeijingInternationalHorticulturalExhibitionisslatedtokickoffonApril29,2019.(Xinhua/ZhangChenlin)AerialphototakenonMarch26,2019showsthenightviewofChinaPavilionoftheInternationalHorticulturalExhibition2019BeijingChina(Expo2019Beijing)inYanqingDistrictofBeijing,capitalofChina.The2019BeijingInternationalHorticulturalExhibitionisslatedtokickoffonApril29,2019.(Xinhua/MaXiaodong)AerialphototakenonMarch26,2019showsthenightviewatthesiteoftheInternationalHorticulturalExhibition2019BeijingChina(Expo2019Beijing)inYanqingDistrictofBeijing,capitalofChina.The2019BeijingInternationalHorticulturalExhibitionisslatedtokickoffonApril29,2019.(Xinhua/JuHuanzong)AerialphototakenonMarch26,2019showsthenightviewofChinaPavilionoftheInternationalHorticulturalExhibition2019BeijingChina(Expo2019Beijing)inYanqingDistrictofBeijing,capitalofChina.The2019BeijingInternationalHorticulturalExhibitionisslatedtokickoffonApril29,2019.(Xinhua/MaXiaodong)AerialphototakenonMarch26,2019showsthenightviewofChinaPavilionoftheInternationalHorticulturalExhibition2019BeijingChina(Expo2019Beijing)inYanqingDistrictofBeijing,capitalofChina.The2019BeijingInternationalHorticulturalExhibitionisslatedtokickoffonApril29,2019.(Xinhua/ZhangChenlin)AerialphototakenonMarch26,2019showsthenightviewofInternationalPavilionoftheInternationalHorticulturalExhibition2019BeijingChina(Expo2019Beijing)inYanqingDistrictofBeijing,capitalofChina.The2019BeijingInternationalHorticulturalExhibitionisslatedtokickoffonApril29,2019.(Xinhua/JuHuanzong) Chinasaw112milliondomestictouristtripsduringthethree-dayQingmingFestivalfromlastFridaytoSunday,up10.9percentcomparedtolastyear,accordingtotheMinistryofCultureandTourism.Tourismrevenuereached47.9billionyuan(about7.1billionU.S.dollars)duringtheholiday,up13.7percentyear-on-year.Short-distancetourstakeupover60percentofthetripsmadeduringtheperiod.Appreciatingflowerblossoms,hikinginurbanoutskirts,andpickingupfruitsandvegetablesatorchardsandfarmsforrecreationalandcommercialpurposesweretopchoicesforthosewhowentoutasafamilyorgroup.OnlineticketsalesforredtourismscenicspotsinChinasawayear-on-yearincreaseof55.2percent.Localhistorymuseums,aswellascemeteryparksandmemorialhallsofheroesandmartyrsacrossthecountryheldthemesactivitiesinhonorofthedeparted.Touristsfounditmeaningfultopaytributetothosewhopavedwayforthelifeweenjoynowbyvisitingthesemuseumsandparks.Forculturaltourism,programsrangedfromexhibitionstooperas.Folkculturewasappreciatedduringtheholiday,hencedestinationsincludingmuseums,townshipsofculturalheritages,placesforworshipandpraying,andcountieswithuniquecustomsandtraditionswereallpopularchoicesfortourists.SignaturefoodofQingmingFestivalwouldn'tbemissed,either.Forexample,theWestLakeineastChina'sHangzhouofferedQingtuan,atraditionaldessertoftheQingmingFestival,forfreeonthefirstdayoftheholiday.

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