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内容付费:卖家的“知识钱”买家的“焦虑税”

2019-05-27 17:41 来源:中国崇阳网

  内容付费:卖家的“知识钱”买家的“焦虑税”

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PhototakenonJune7,2018showsexhibitsattheAfricanArtExhibitioninsouthwestChina(Xinhua/WangQuanchao)AcuratorintroducestheAfricanArtExhibitionheldinsouthwestChinasChongqing,June7,(Xinhua/WangQuanchao)JournaliststakephotosattheAfricanArtExhibitioninsouthwestChinasChongqing,June7,(Xinhua/WangQuanchao)PhototakenonJune7,2018showsexhibitsattheAfricanArtExhibitioninsouthwestChina(Xinhua/WangQuanchao)AjournalisttakesphotosattheAfricanArtExhibitioninsouthwestChinasChongqing,June7,(Xinhua/WangQuanchao)同时,当地财政将安排10亿元人民币补贴引进人才、鼓励创新。

    ——2013年2月2日至5日,习近平在甘肃调研考察时的讲话  找准我国科技发展现状和应走的路径  实施创新驱动发展战略,不能“脚踩西瓜皮,滑到哪儿算哪儿”,要抓好顶层设计和任务落实。(CNS),astate-levelnewsagencysponsoredandestablishedbyChinesejournalistsandrenownedoverseasChineseexpertsonOctober1,(),,,includingin-depthcoverage,featurestoriesandvisualcontent,withtopicssuchascurrentevents,art,lifestyle,(CNS)isnotonlyastate-levelnewsagencyspreadingnewsworldwide,butalsoaninternationalnewsagencywithsubscribersinTaiwan,HongKongandMacao,,formervicechairmanoftheStandingCommitteeoftheNationalPeoplesCongress,,therewereothermajorsponsorsandbuilders,suchasJinZhonghua,HuYuzhi,,awell-knownexpertoninternationalissues,,CNSwastheInternationalNewsService,,adatabaseofinforma(includingwritings,photosandspecialarticles)andamodernmethodofreporting(mainlythroughinternet,videosandSMS)providedtooverse,,HongKongandMacao,aswellasbranchesorreportstationsinTokyo,Bangkok,KualaLumpur,NewYork,Washington,LosAngeles,SanFrancisco,Vancouver,London,Paris,,andnewsreleasecentershavebeenestablishedinBeijing,,multi-levelandmulti-functionnewsreleasesystem,CNSprovidesallkindsofnewsandinformation,’,,1999,theheadquartersofCNSlauncheditsofficialwebsite,namedChinanews().ChinanewsisconsideredoneofChina’smostimportantonlinenewssources.

  AlightsandfireworksshowtakesplaceinQingdao,thehostcityofthe18thShanghaiCooperationOrganization(SCO)summit,ineastChinasShandongProvince,June9,2018.(Xinhua/JiangKehong)AlightsandfireworksshowtakesplaceinQingdao,thehostcityofthe18thShanghaiCooperationOrganization(SCO)summit,ineastChinasShandongProvince,June9,2018.(Xinhua/JiangKehong)AlightsandfireworksshowtakesplaceinQingdao,thehostcityofthe18thShanghaiCooperationOrganization(SCO)summit,ineastChinasShandongProvince,June9,2018.(Xinhua/JiangKehong)AlightsandfireworksshowtakesplaceinQingdao,thehostcityofthe18thShanghaiCooperationOrganization(SCO)summit,ineastChinasShandongProvince,June9,2018.(Xinhua/JiangKehong)AlightsandfireworksshowtakesplaceinQingdao,thehostcityofthe18thShanghaiCooperationOrganization(SCO)summit,ineastChinasShandongProvince,June9,2018.(Xinhua/LiXueren)AlightsandfireworksshowtakesplaceinQingdao,thehostcityofthe18thShanghaiCooperationOrganization(SCO)summit,ineastChinasShandongProvince,June9,2018.(Xinhua/LiZiheng)Alightsandfireworksshowwiththethemeof"AWarmWelcometoFriendsfromAfar"takesplaceinQingdao,thehostcityofthe18thShanghaiCooperationOrganization(SCO)summit,ineastChinasShandongProvince,June9,2018.(Xinhua/XieHuanchi)Alightsandfireworksshowwiththethemeof"AWarmWelcometoFriendsfromAfar"takesplaceinQingdao,thehostcityofthe18thShanghaiCooperationOrganization(SCO)summit,ineastChinasShandongProvince,June9,2018.(Xinhua/XieHuanchi)中国新闻网声明:媒介合作需合法依约规范有序中国新闻网(简称中新网)由国家级、国际性通讯社——中国新闻社(简称中新社)主办。

FolkartistZhangBinmakesdoughfigurinesinanintangibleculturalheritagefairinShenyang,capitalofnortheastChinasLiaoningProvince,June9,ritageDayonSaturday.(Xinhua/YaoJianfeng)PeoplevisitChineseculturalheritageartexhibitioninGuangzhou,southChinasGuangdongProvince,June9,ritageDayonSaturday.(Xinhua/LuHanxin)ApersonvisitsChineseculturalheritageartexhibitioninGuangzhou,southChinasGuangdongProvince,June9,ritageDayonSaturday.(Xinhua/LuHanxin)InkstoneamateurscompeteinaninkstonecarvingcontestinWuyuan,eastChinasJiangxiProvince,June9,ritageDayonSaturday.(Xinhua/SongZhenping)AchildgetshissugarpaintinginanintangibleculturalheritagefairinShenyang,capitalofnortheastChinasLiaoningProvince,June9,ritageDayonSaturday.(Xinhua/YaoJianfeng)AfolkartistcommunicateswithonlineaudienceinnorthChinasTianjinMunicipality,June9,ritageDayonSaturday.(Xinhua/LiRan)

  中新网版权及免责声明1)凡本网注明“来源:中国新闻网”或带有“中新社”和“中新网”电头的所有文字、加盖“中新社”或“中新网”水印且注明“中新社发****摄”、“中新社记者****摄”或“中新网记者****摄”的图片稿件、来源为“中国新闻网”或视频画面上标有“中新社”、“中新网”、“CNSTV”的视频,版权均属中新社或中新网所有,未经本网书面授权,任何媒体、网站或个人不得转载、链接、转贴或以其他方式使用,否则即为侵权,本网将依法追究其法律责任。

  PublichealthworkerssprayinsecticideamidfearsofanewcholeraoutbreakinSanaa,Yemen,June7,’srainyseasonwilllikelytriggeranotherwaveofcholera,puttingmillionsatriskinthewar-torncountry,whichisstillreelingfromoneoftheworld’sworstoutbreaksofthekillerdisease,scientistswarnedinMay.(Photo/Agencies)PublichealthworkerssprayinsecticideamidfearsofanewcholeraoutbreakinSanaa,Yemen,June7,’srainyseasonwilllikelytriggeranotherwaveofcholera,puttingmillionsatriskinthewar-torncountry,whichisstillreelingfromoneoftheworld’sworstoutbreaksofthekillerdisease,scientistswarnedinMay.(Photo/Agencies)PublichealthworkerssprayinsecticideamidfearsofanewcholeraoutbreakinSanaa,Yemen,June7,’srainyseasonwilllikelytriggeranotherwaveofcholera,puttingmillionsatriskinthewar-torncountry,whichisstillreelingfromoneoftheworld’sworstoutbreaksofthekillerdisease,scientistswarnedinMay.(Photo/Agencies)Ajournalistasksforinformationatthemediacenterforthe18thShanghaiCooperationOrganizationSummitinQingdao,Shandongprovince,onFriday.[PhotobyFengYongbin/ChinaDaily]LiGuangda,avolunteeratthe18thShanghaiCooperationOrganizationSummit,saidhehasreceivedmanythumbs-upfromforeignreportersforhisprofessionalandfriendlyassistancesincehebeganservingattheinformationdeskofthesummitsmediacenter."It,,"saidt,000studentvolunteersrecruitedfrom10universitiesinthecoastalcity,,another18,000volunte,theyarenicknamed"littleseasplashes".Theyhavebeenmobilizedtooffervariousservicesforthesummit,suchasassistancetoguestswitharrivalanddeparture,ionSummitinQingdao,Shandongprovince,onFriday.[PhotobyFengYongbin/ChinaDaily]Li,anundergraduatemajoringinEnglish,,000studentsappliedtobecomevolunteersforthesummit,accordingtothemeetingsorganizingcommittee."Theenthusiasmfromstudentsisbeyondourexpectations,"saidSunJian,whoworksforthecommitteesworkinggroupofvolunteers."Wevechosentheoneswithbetterexpertisethatisparticularlyhelpfulforthesummit,suchasstudentsmajoringinforeignlanguagesandcomputers."Eachvolunteerhasreceivedabout40hoursoftrainingbeforethesummit,hesaid."Besideslessonsonetiquette,weveinvitedexpertsfromtheMinistryofForeignAffairstogivethevolunteerslecturesonhowtheSCOworksandthetraditionsofthecountriesparticipatinginthesummit."LihasbeenaboutQingdao,becausetheyaretheonesthereportersgotofirstiftheyhavequestions,ionSummitinQingdao,Shandongprovince,onFriday.[PhotobyFengYongbin/ChinaDaily]"Itsanhonortobepartofsuchanimportantevent,"headded."WejustwanttoleavetheguestsandreporterswithagoodimpressionofQingdaoandtheChinesepeople."Moreimportant,Ialsofindjoyinmeetingpeoplefromdifferentcountries,whichhasbroadenedmyviews,",ateacherfromOceanUniversityofChinaandavolunteerorganizer,saiditsnotaneasyjobtomaintainagoodpostureandgreetpeoplewithasmilealldaylong,aswellasofferusefulandprofessionalassistance."Thestudentstoldmethattheyenjoytheworkbecausetheygenuinelywanttoofferthebestservice,"shesaid."Improudofthem."

  ,2017showstwilightthroughtheSeventeenArchBridgeintheSummerPalaceinBeijing,capitalofChina.(Xinhua/LiuXianguo)China,700activitieswillbeheldacrossChinatocelebratethisyearsculturalandnaturalheritageday,,whichwasestablishedtosafegstakealookat20culturalheritagesitesinChina,,originallynamedQingyiYuan,ortheGardenofClearRipples,wasanimperialgardenconstructedin1750byEmperorQianlonginabidtocelebratehismother,emperorsandempressesspenttheirleisuretimethere,eselandscapegardendesign,,capitalofsouthwestChinasTibetAutonomousRegion,,2018,togreettheSpringFestivalandTibetanNewYear.(Xinhua/Chogo),LhasaThePotalaPalace,winterpalaceoftheDalaiLama,hassymbolizedTibetanBuddhismanditscen,madeupoftheWhiteandRedPalaceswiththeirancillarybuildings,isbuiltonRedMountaininthecenterofLhasaValley,atanaltitudeof3,,JokhangTempleMonasteryandNorbulingkawereaddedtothelistrespectivelyin1994,,2018showsthesnowsceneryofWestLakeinHangzhou,eastChinaZhejiangProvince,,2018.(Xinhua/HuangZongzhi),,WestLakeCulturalLandscapeofHangzhouhasinspiredfamouspoets,,pagodas,pavilions,gardensandornamentaltrees,,2018showsseaofcloudsafterrainfallatHuangyaguansectionoftheGreatWallinTianjin,northChina.(Xinhua/YangYushan),theGreatWallwindsupanddownacrossdeserts,grasslands,mountainsandplateaus,,horsetracks,watchtowers,andsheltersonthewall,,000years,,itisstilloneofthemostappealingattractionsallaroundt,oneofthegreatestwondersoftheworld,,northwestChinasGansuProvince,,2016.(Photo/Xinhua),Gansuprovince,theMogaocaves,alsoknownastheThousand-BuddhaCaves,aretheworldslargest,mostrichlyendowed,,atthecrossroadsoftradeaswellasreligious,,thecarvingofthecavesstartedin366ADandcontinuedforabout1,,housingabout45,000squaremetersofmuralsandmorethan2,000paintedsculptures,,wi(Photo/Xinhua)sYuanDynastyinChina,slegendarycapitalcity,designedbytheMongolrulersChineseadvisor,LiuBingzhong,,includingtemples,palaces,tombs,nomadicencampmentsandtheTiefangangCanal,,,:/FengJun):anImperialSacrificialAltarinBeijingLocatedinthesouthernpartofBeijing,theTempleofHeavenisamagnificentcomplexoffirs,andisthelargestoneinBeijingamongseveralroyalaltarstoHeaven,Earth,theSun,,SoutheastChinasFujianprovince,onDec9,2016.(Photo:ChinaNewsService/WangDongming)e15thand20thcenturiesover120kilometersinthesouth-westofFujianprovince,irfunctionexe,,efilm,resembling"scarfs"and"dresses",aspartoftheirrestorationintheEmperorQinshihuangsMausoleumSiteMuseuminXian,Shaanxiprovince,Feb23,2015.(Photo/CFP)ntainingterracottawarriorsandhorsesarelocatedinLintongcounty,nearXi’ancity,,,themausoleumislaidoutinlinewiththedimensionsofXianyang,,,,ridianGate(WuMen)ofthePalaceMuseuminBeijing,April17,2018.(Photo:ChinaNewsService/DuYang)ForbiddenCity,locatedinthecenterofBeijing,,,,(anareaenclosedbyfourpoles).In1924,theimperialfamilyoftheQingDynastywasremovedfromtheForbiddenCity,age,nearMountHuangshan,Anhuiprovince,inMay.(Photo:ChinaDaily/WangHao),HuangshancityinsouthAnhuiprovince,thetwotraditionalvillagesXidiandHongcunarearchitecturalcomplexes,,landscape,architecturalform,decorationandconstructiontechniquesallretaint,northChinasShanxiProvince,April22,,listedasaUNESCOWorldCulturalHeritagesitein2001,willwitnessatourismpeakastheMayDayholidayiscoming.(Photo:Xinhua/YanYan),some16kmwestofDatongcity,Shanxiprovince,theYungangGrottoeswerebuiltagainstthemountainandextendaboutonekm(),000statueswithinacarvedareaof18,000squaremeters,YungangGrottoesrepresenttheoutstandin,withtheirstrictunityoflayoutanddesign,coPoliticalPartyForumvisitLiuyuanorLingeringGardeninSuzhou,eastChinasJiangsuProvince,April22,2013.(Xinhua/ShenPeng),whichseekstorecreateminiaturenaturallandscapes,isnotillustratedanybetterthanintheninegardensinthehistoriccityofSuzhou,’,2017showstheviewofChengdesummerresortinnorthChinasHebeiProvince.(Xinhua/LiuMancang),ChengdeIntermsofthegenerallayout,architecturalstyles,constructiontechniques,decorationdetailsandgardenlandscape,theMountainResort,avastcomplexofpalacesandadministrativeandceremonialbuildingsbuiltbetween1703and1792,representsthebroadexchangeandconvergencebetweenHancultureandtheethniccultures-Confucianism,BuddhismandTaoism-andthearchitecturalstylesbetweenChina,theMountainResorthastemplesofmanyarchitecturalstylesandimperialgardensblendeffortlesslyintoalandscapeoflakes,,,centralChinasHenanProvince,April17,(Xinhua/ZhuXiang)e(618-907).Located13kmsouthofLuoyang,Henanprovince,theLongmenGrottoesareconcentratedontheeastandwestcliffsoftheYishuiRiver,,duringtheNorthernWeiDynasty,Grottoes,liketheTwentyGemsofLongmenCalligraphyandZhuSuiliang’sstonetablets,,madein641inhonorofthemotherofthefourthsonofEmperorTaizong,,,LushanMountainisoneofthemostrenownedmountainsandtourismresortsinthecountry.(Photo/ShanghaiDaily),LushanMountainisoneofChina’,whichwasinscribedontheWorldHeritageListin1996,i,LushanisthebirthplaceofChineselandscapepoetry,plus,thefamousLushanPlenumrepresentsitsroleinChina’,,southwestChinasYunnanProvince,,SCOin1997.(Photo:Xinhua/YangZongyou),lyingontheLijiangplainatanelevationof2,400metersinsouthwestYunnanprovinceofChina,alandstrategifelementsfromseveralcultures,anditsancientwater-supplysy,WudangMountain,alsoknownasTaiheMountain,isbothafamousscenicspotandaholysiteofTaoism,Chinasindigenousreligion.(Photo/)anjiangkouincentralHubeiprovince,theWudangMountainsarehometoafamouscomplexofancientpalaces,periodofnearly1,,anannualeventputonbythespecialadministrativeregionsgovernment,sonSundaynight,(Photo:Xinhua/ZhangJinjia)’straditionalChinesedesign,itstandswitnesst’smissionaryroleintheFarEastwhilealso,formingthemostuniqueblendofculturalheritageexistinginChina’,,clairaudienceandtheJadeEmperorintheDazuRockCarvingsinChongqingmunicipality.(Photo/TheofficialWechataccountofDazuRockCarvings),,’,50,000statuesand100,000inscribedwithChinesecharacter,1999.

  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nditsancientwater-supplysy,WudangMountain,alsoknownasTaiheMountain,isbothafamousscenicspotandaholysiteofTaoism,Chinasindigenousreligion.(Photo/)anjiangkouincentralHubeiprovince,theWudangMountainsarehometoafamouscomplexofancientpalaces,periodofnearly1,,anannualeventputonbythespecialadministrativeregionsgovernment,sonSundaynight,(Photo:Xinhua/ZhangJinjia)’straditionalChinesedesign,itstandswitnesst’smissionaryroleintheFarEastwhilealso,formingthemostuniqueblendofculturalheritageexistinginChina’,,clairaudienceandtheJadeEmperorintheDazuRockCarvingsinChongqingmunicipality.(Photo/TheofficialWechataccountofDazuRockCarvings),,’,50,000statuesand100,000inscribedwithChinesecharacter,1999.AguestvisitsgiantpandaMengmengatBerlinZooinBerlin,Germany,June9,,thetwopandasfromChina,arrivedinBerlinonJune24,sstayhereinBerlinZoo.(Xinhua/ShanYuqi)AgirlpickspandasouvenirsatBerlinZooinBerlin,Germany,June9,,thetwogiantpandasfromChina,arrivedinBerlinonJune24,sstayhereinBerlinZoo.(Xinhua/ShanYuqi)AguesttakesphotosofgiantpandaJiaoqingatBerlinZooinBerlin,Germany,June9,,thetwopandasfromChina,arrivedinBerlinonJune24,sstayhereinBerlinZoo.(Xinhua/ShanYuqi)GuestsvisitgiantpandaJiaoqingatBerlinZooinBerlin,Germany,June9,,thetwopandasfromChina,arrivedinBerlinonJune24,sstayhereinBerlinZoo.(Xinhua/ShanYuqi)PandasouvenirsareseenatBerlinZooinBerlin,Germany,June9,,thetwopandasfromChina,arrivedinBerlinonJune24,sstayhereinBerlinZoo.(Xinhua/ShanYuqi)PandasouvenirsareseenatBerlinZooinBerlin,Germany,June9,,thetwopandasfromChina,arrivedinBerlinonJune24,sstayhereinBerlinZoo.(Xinhua/ShanYuqi)

  (CNS),astate-levelnewsagencysponsoredandestablishedbyChinesejournalistsandrenownedoverseasChineseexpertsonOctober1,(),,,includingin-depthcoverage,featurestoriesandvisualcontent,withtopicssuchascurrentevents,art,lifestyle,(CNS)isnotonlyastate-levelnewsagencyspreadingnewsworldwide,butalsoaninternationalnewsagencywithsubscribersinTaiwan,HongKongandMacao,,formervicechairmanoftheStandingCommitteeoftheNationalPeoplesCongress,,therewereothermajorsponsorsandbuilders,suchasJinZhonghua,HuYuzhi,,awell-knownexpertoninternationalissues,,CNSwastheInternationalNewsService,,adatabaseofinforma(includingwritings,photosandspecialarticles)andamodernmethodofreporting(mainlythroughinternet,videosandSMS)providedtooverse,,HongKongandMacao,aswellasbranchesorreportstationsinTokyo,Bangkok,KualaLumpur,NewYork,Washington,LosAngeles,SanFrancisco,Vancouver,London,Paris,,andnewsreleasecentershavebeenestablishedinBeijing,,multi-levelandmulti-functionnewsreleasesystem,CNSprovidesallkindsofnewsandinformation,’,,1999,theheadquartersofCNSlauncheditsofficialwebsite,namedChinanews().ChinanewsisconsideredoneofChina’smostimportantonlinenewssources.

  (CNS),astate-levelnewsagencysponsoredandestablishedbyChinesejournalistsandrenownedoverseasChineseexpertsonOctober1,(),,,includingin-depthcoverage,featurestoriesandvisualcontent,withtopicssuchascurrentevents,art,lifestyle,(CNS)isnotonlyastate-levelnewsagencyspreadingnewsworldwide,butalsoaninternationalnewsagencywithsubscribersinTaiwan,HongKongandMacao,,formervicechairmanoftheStandingCommitteeoftheNationalPeoplesCongress,,therewereothermajorsponsorsandbuilders,suchasJinZhonghua,HuYuzhi,,awell-knownexpertoninternationalissues,,CNSwastheInternationalNewsService,,adatabaseofinforma(includingwritings,photosandspecialarticles)andamodernmethodofreporting(mainlythroughinternet,videosandSMS)providedtooverse,,HongKongandMacao,aswellasbranchesorreportstationsinTokyo,Bangkok,KualaLumpur,NewYork,Washington,LosAngeles,SanFrancisco,Vancouver,London,Paris,,andnewsreleasecentershavebeenestablishedinBeijing,,multi-levelandmulti-functionnewsreleasesystem,CNSprovidesallkindsofnewsandinformation,’,,1999,theheadquartersofCNSlauncheditsofficialwebsite,namedChinanews().ChinanewsisconsideredoneofChina’smostimportantonlinenewssources.

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  内容付费:卖家的“知识钱”买家的“焦虑税”

 
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C919离商用还有多久? 副总设计师:顺利的话两三年

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核心提示:昨日,上海浦东国际机场,中国自主研制的大型客机C919试飞成功。继欧美后,中国成为又一个大型客机自主研制者。

5月5日,中国首款国际主流水准的干线客机C919在上海浦东国际机场首飞。

昨日,上海浦东国际机场,中国自主研制的大型客机C919试飞成功。继欧美后,中国成为又一个大型客机自主研制者。

该飞机自2008年开始研制,中国拥有其完全自主知识产权。超过200家企业、约20万人参与了研制和生产。飞机标准航程型设计航程为4075公里,增大航程型设计航程为5555公里。目前已有23家用户,订单570架。首飞完成后,C919将进入适航取证阶段,接受各项飞机适航的测试考验。

C919的总设计师吴光辉表示,“经过市场调研,150座级的客机是市场上的主流机型,市场前景最好,因此,我们以首先满足国内市场需求为导向选定了这个机型。”

吴光辉说:“中国是全球最大的民航市场,飞机需求最多。立足国内市场,面向全球市场,这是我对C919的定位。从设计航程看,C919可以满足中国任何点到点的飞行。”综合新华社

【六问大飞机】

1 大飞机首飞的目的是什么?

C919主制造商中国商飞介绍,飞机首飞即指一架新制造的飞机首次离地飞行。每一架飞机均有首飞,但一个新型号的首飞更有特殊意义。它既是由设想变图纸、图纸变实物、实物能飞行等一系列工作链中的一个重要环节,又是新型号由静止到运动的转折点,也是新型号诞生的重要里程碑。

通常担任首飞的飞行员,都必须经验非常丰富,须对首飞任务充满信心。试飞员完全不应受外力的推动而勉强去执行首飞。

首次试飞,只要飞机开始滑行和离地,最基本的系统功能就得到初步考核,当然这也是重要内容。

试飞员将首次评价飞机的操稳特性、起飞着陆性能、动力装置和驾驶设备等工作情况。一般轻型飞机的首飞时间不超过30至40分钟,大型飞机为1至2小时。

首飞一般选择一个好天气,能见度不低于5-7公里,没有低云和侧风。首飞飞机的飞行重量应尽量减轻,以最大限度减小起飞离地速度、缩短起飞滑跑距离,从而改善驾驶条件。

2 C919试飞为何不收起落架?

中国商飞介绍,首飞时不收起落架属于正常,因为首飞突出的是仪式感,并不需要体现性能,只是为了让大家知道飞机能安全起降。整个过程安全第一。所以,像首飞这样短时间飞行,起落架不收没问题。不收起落架还能防止出现收了放不下的情况。此外,还可以测试起落架放下时的飞行性能。

但空客最近两款新机型A350XWB和A320neo的首飞,起落架在飞行过程中均完成了收放测试。A350-900(空客A350XWB的一种型号)首飞时进行的起落架收放测试,表明空客对该全新宽体飞机有充足的信心。而A320neo是换装全新发动机的单通道飞机,其前任机型A320ceo(现款A320系列飞机)于1987年首飞,A320neo与A320ceo保持了95%的高度通用性,仅在发动机和一些气动性能上做了改进,所以随之带来的风险也相对较低。

3 试飞时为何需要飞机伴飞?

中国商飞介绍,在首飞时,通常会安排伴飞飞机跟飞观测,它的任务是在空中对首飞飞机进行实时观测、记录飞行数据、拍摄照片和视频,全力保证飞机在首飞过程中的安全。一旦出现任何问题,伴飞飞机的机组人员将立即向试飞飞机的机组人员发出警告,向地面管控人员报告,并引导首飞飞机安全降落。

此外,伴飞飞机还将监测首飞飞机的空中环境,确保不会有其他飞机闯入首飞飞机的飞行线路,并防范任何窃密的隐患。

4 首飞距正式商用还有多久?

广州民航职业技术学院副教授綦琦认为,正式商用之前还要完成适航审定的每一个科目。“适航审定前,还有一些系统调试,因为每一个部件都要在真实的飞行条件下测试。C919要完成各种审定科目,至于时间多久,得看这些科目由多少架飞机完成。”綦琦说。

“今天首飞的是001号,就是一号原型机。一般飞机生产商为了加速飞机的研发速度,还会再制造第二架、第三架原型机,这些飞机会完成各自的科目,这样的原型机越多,科目审定的效率就会越高,从而缩短投入商用的时间。”綦琦说。

C919大型客机副总设计师周贵荣给出的时间是两三年。“这是顺利的情况,当中会有各种调试。”綦琦说。

5 研发国产大飞机意义在哪?

綦琦认为,意义更多体现在压低国际市场的产品价格上。“我们有这个技术了,国际市场产品有了替代品,价格会立马下降。我们有了可替代的机型,可以通过更合理的价格,得到相同的产品。因为C919的出现,波音总装厂才会来中国。”

对于C919未来的发展前景,綦琦认为,现在展望还为时过早。

“波音、空客迭代这么多年,才有了现在可靠的产品,我们不能给一个尚处于试飞阶段的机型太多压力,应该是一个循序渐进的过程。展望的节点应是C919适航审定完成。”綦琦说,“现在C919还是一个试验机型,拿到适航审定证可以投入商业使用,获得牌照,才证明是一个产品,那个节点更有意义。”

对于C919的国产化程度,綦琦表示,“现在是全球制造,哪一个公司的产品好,就用哪个公司的产品。而飞机最难的是总装和集成,你可能拿到波音所有的配件,但是装在一起就不一定有波音的性能,这就是总装、调试的重要性”。

6 与波音空客比差距在哪里?

綦琦认为,客观数据对比一目了然,但这只是数据层面,“更主要的是,波音和空客已经是成熟的产品,已经是被商业用户所使用的。而C919还停留在试验机阶段,还不是一个量级的产品,没有可比性,盲目去比,对C919不是很公平”。

“任何事物都有发展规律,对方已经是迭代了五六代的机型,咱们是第一代的机型,就要达到相同的标准,那会给中国商飞更大的压力。”綦琦说。

对于目前C919获得的570架订单,綦琦认为,这些订单更像是在表态。“这些订单的成立都是有前提条件的,就是能拿到牌照,前面的机型稳定。真要走向国际市场,还要看运营成本和安全系数,这都需要时间去证明。”(完)

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