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【说明】 某供销系统接受顾客的订货单，当库存中某配件的数量小于订购量或库存量低于一定数量时，向供应商发出采货单；当某配件的库存量大于或等于订购量时，或者收到供应商的送货单时并更新了库存后，向顾客发出...
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【说明】某供销系统接受顾客的订货单当库存中某配件的数量小于订购量或库存量低于一定数量时向供应商发出采
阅读以下说明和流程图回答问题1和问题2 【说明】某供销系统接受顾客的订货单当库存中某配件的
[说明]某供销系统接受顾客的订货单当库存中某配件的数量小于订购量或库存量低于一定数量时向供应商发出采
【说明】某供销系统接受顾客的订货单当库存中某配件的数量小于订购量或库存量低于一定数量时向供应商发出采
[说明]某供销系统接受顾客的订货单当库存中某配件的数量小于订购量或库存量低于一定数量时向供应商发出采
阅读下列说明和数据流图回答问题1至问题3将解答填入对应栏内 [说明] 某供销系统接受顾
阅读下列说明和数据流图回答问题1至问题3将解答填入对应栏内 [说明] 某供销系统接受顾
阅读以下说明和流程图回答问题1和问题2 【说明】某供销系统接受顾客的订货单当库存中某配件的
阅读下列说明和数据流图回答问题1至问题3将解答填入对应栏内 [说明] 某供销系统接受顾
阅读下列说明和数据流图回答问题1至问题3将解答填入对应栏内 [说明] 某供销系统接受顾
阅读下列说明和数据流图回答问题1至问题3 【说明】 某供销系统接受顾客的订货单当库存中某配件的数
阅读以下说明和流程图回答问题1和问题2 【说明】 某供销系统接受顾客的订货单当库存中某配件的数量
[说明]某供销系统接受顾客的订货单当库存中某配件的数量小于订购量或库存量低于一定数量时向供应商发出采
阅读下列说明和数据流图回答问题1至问题3将解答填入对应栏内 [说明] 某供销系统接受顾
【说明】某供销系统接受顾客的订货单当库存中某配件的数量小于订购量或库存量低于一定数量时向供应商发出采
阅读以下说明和流程图回答问题1和问题2 【说明】 某供销系统接受顾客的订货单当库存中某配件的数量
【说明】某供销系统接受顾客的订货单当库存中某配件的数量小于订购量或库存量低于一定数量时向供应商发出采
【说明】 某供销系统接受顾客的订货单当库存中某配件的数量小于订购量或库存量低于一定数量时向供应
【说明】 某供销系统接受顾客的订货单当库存中某配件的数量小于订购量或库存量低于一定数量时向供应
阅读下列说明和数据流图回答问题1至问题3将解答填入对应栏内 [说明] 某供销系统接受顾
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FornearlytenyearstheUnifiedModelingLanguageUMLhasbeentheindustrystandardforvisualizingspecifyingconstructinganddocumentingthe26ofasoftware-intensivesystem.Asthe27standardmodelinglanguagetheUMLfacilitatescommunicationandreducesconfusionamongproject28TherecentstandardizationofUML2.0hasfurtherextendedthelanguage’sscopeandviability.Itsinherentexpressivenessallowsusersto29everythingfromenterpriseinformationsystemsanddistributedWeb-basedapplicationstoreal-timeembeddedsystems.TheUMLisnotlimitedtomodelingsoftware.Infactitisexpressiveenoughtomodel30systemssuchasworkflowinthelegalsystemthestructureandbehaviorofapatienthealthcaresystemsoftwareengineeringinaircraftcombatsystemsandthedesignofhardware.TounderstandtheUMLyouneedtoformaconceptualmodelofthelanguageandthisrequireslearningthreemajorelements:theUML’sbasicbuildingblockstherulesthatdictatehowthosebuildingblocksmaybeputtogetherandsomecommonmechanismsthatapplythroughouttheUML.
关于软件著作权产生的时间下面表述正确的是______
[问题2]使用关系代数表达式写出查询所有年龄在20岁以下的学生姓名和年龄
Peopleareindulginginanillusionwhenevertheyfindthemselvesexplainingatacocktail鸡尾酒partysaythattheyareincomputersorintelecommunicationsorinelectronicfundstransfer.Theimplicationisthattheyarepartofthehigh-techworld.Justbetweenustheyusuallyaren’t.Theresearcherswhomadefundamentalbreakthroughsinthoseareasareinahigh-techbusiness.Therestofusare11oftheirwork.Weusecomputersandothernewtechnologycomponentstodevelopourproductsortoorganizeouraffairs.Becausewegoaboutthisworkinteamsandprojectsandothertightlyknitworkinggroup紧密联系在一起的工作小组wearemostlyinthehumancommunicationbusiness.Oursuccessesstemfromgoodhumaninteractionsbyallparticipantsintheeffortandourfailuresstemfrompoorhumaninteractions.Themainreasonwetendtofocusonthe12ratherthanthehumansideofworkisnotbecauseit’smore13butbecauseit’seasiertodo.GettingthenewdiskdriveinstalledispositivelytrivialcomparedtofigurineoutwhyHoraceisinabluefunk恐惧orwhySusanisdissatisfiedwiththecompanyaveronlyafewmonths.Humaninteractionsarecomplicatedandneververycrisp干脆的干净利落的andcleanintheireffectsbuttheymattermorethananyotheraspectofthework.Ifyoufindyourselfconcentratingonthe14ratherthanthe15you’relikethevaudevillecharacter杂耍人物wholoseshisKeysonadarkstreetandlooksforthemontheadjacentstreetbecauseasheexplainsThelightisbetterthere!/
Object-orientedanalysisOOAisasemiformalspecificationtechniquefortheobject-orientedparadigm.Object-orientedanalysisconsistsofthreesteps.Thefirststepis6.Itdetermineshowthevariousresultsarecomputedbytheproductandpresentsthisinformationintheformofa7andassociatedscenarios.Thesecondis8whichdeterminestheclassesandtheirattributesthendeterminestheinterrelationshipsandinteractionamongtheclasses.Thelaststepis9whichdeterminestheactionsperformedbyortoeachclassorsubclassandpresentsthisinformationintheformof10.
Object-orientedanalysisOOAisasemiformalspecificationtechniquefortheobject-orientedparadigm.Object-orientedanalysisconsistsofthreesteps.Thefirststepis6.Itdetermineshowthevariousresultsarecomputedbytheproductandpresentsthisinformationintheformofa7andassociatedscenarios.Thesecondis8whichdeterminestheclassesandtheirattributesthendeterminestheinterrelationshipsandinteractionamongtheclasses.Thelaststepis9whichdeterminestheactionsperformedbyortoeachclassorsubclassandpresentsthisinformationintheformof10.
[问题4]在E-R模型中如果实体间是1:N的联系如何设计相应部分的关系模型
王某是一名程序员每当软件开发完成后均按公司规定完成软件文档并上交公司存档自己没有留存因撰写论文的需要王某向公司要求将软件文档原本借出复印但遭到公司拒绝理由是该软件文档属于职务作品著作权归公司以下叙述中正确的是______
Observethatfortheprogrammerasforthecheftheurgencyofthepatron顾客maygovernthescheduledcompletionofthetaskbutitcannotgoverntheactualcompletion.Anomelette煎鸡蛋promisedintwominutesmayappeartobeprogressingnicely.Butwhenithasnotsetintwominutesthecustomerhastwochoices—waitsoreatsitraw.Softwarecustomershavehad16choices.NowIdonotthinksoftware17havelessinherentcourageandfirmnessthanchefsnorthanotherengineeringmanagers.Butfalse18tomatchthepatron’sdesireddateismuchmorecommoninourdisciplinethanelsewhereinengineering.Itisvery19tomakeavigorousplausibleandjobriskingdefenseofanestimatethatisderivedbynoquantitativemethodsupportedbylittledataandcertifiedchieflybythehunchesofthemanagers.Clearlytwosolutionsareneeded.Weneedtodevelopandpublicizeproductivityfiguresbug-incidencefiguresestimatingrolesandsoon.Thewholeprofessioncanonlyprofitfrom20suchdata.Untilestimatingisonasounderbasisindividualmanagerswillneedtostiffentheirbackbonesanddefendtheirestimateswiththeassurancethattheirpoorhunchesarebetterthanwishderivedestimates.
Whyis21funWhatdelightsmayitspractitionerexpectashisrewardFirstisthesheerjoyofmakingthings.Asthechilddelightsinhismudpiesotheadultenjoysbuildingthingsespeciallythingsofhisowndesign.Secondisthepleasureofmakingthingsthatareusefultootherpeople.Thirdisthefascinationoffashioningcomplexpuzzle-likeobjectsofinterlockingmovingpartsandwatchingthemworkinsubtlecyclesplayingouttheconsequencesofprinciplesbuiltinfromthebeginning.Fourthisthejoyofalwayslearningwhichspringsfromthe22natureofthetask.Inonewayoranothertheproblemisevernewanditssolverlearnssomething:sometimes23sometimestheoreticalandsometimesboth.Finallythereisthedelightofworkinginsuchatractablemedium.The24likethepoetworksonlyslightlyremovedfrompurethought-stuff.Fewmediaofcreationaresoflexiblesoeasytopolishandreworksoreadilycapableofrealizinggrandconceptualstructures.Yettheprogram25unlikethepoet’swordsisrealinthesensethatitmovesandworksproducingvisibleoutputsseparatefromtheconstructitself.Itprintsresultsdrawspicturesproducessoundsmovesarms.Programmingthenisfunbecauseitgratifiescreativelongingsbuiltdeepwithinusanddelightssensibilitieswehaveincommonwithallmen.
ItshouldgowithoutsayingthatthefocusofUMLismodeling.Howeverwhatthatmeansexactlycanbeanopen-endedquestion.1isameanstocaptureideasrelationshipsdecisionsandrequirementsinawell-definednotationthatcanbeappliedtomanydifferentdomains.ModelingnotonlymeansdifferentthingstodifferentpeoplebutalsoitcanusedifferentpiecesofUMLdependingonwhatyouaretryingtoconvey.IngeneralaUMLmodelismadeupofoneormore2.Adiagramgraphicallyrepresentsthingsandtherelationshipsbetweenthesethings.These3canberepresentationsofrealworldobjectspuresoftwareconstructsoradescriptionofthebehaviorofsomeotherobjects.Itiscommonforanindividualthingtoshowuponmultiplediagrams;eachdiagramrepresentsaparticularinterestorviewofthethingbeingmodeled.UML2.0dividesdiagramsintotwocategories:structuraldiagramsandbehavioraldiagrams.4areusedtocapturethephysicalorganizationofthethingsinyoursystemi.e.howoneobjectrelatestoanother.5focusonthebehaviorofelementsinasystem.Forexampleyoucanusebehavioraldiagramstocapturerequirementsoperationsandinternalstatechangesforelements.
Observethatfortheprogrammerasforthecheftheurgencyofthepatron顾客maygovernthescheduledcompletionofthetaskbutitcannotgoverntheactualcompletion.Anomelette煎鸡蛋promisedintwominutesmayappeartobeprogressingnicely.Butwhenithasnotsetintwominutesthecustomerhastwochoices—waitsoreatsitraw.Softwarecustomershavehad16choices.NowIdonotthinksoftware17havelessinherentcourageandfirmnessthanchefsnorthanotherengineeringmanagers.Butfalse18tomatchthepatron’sdesireddateismuchmorecommoninourdisciplinethanelsewhereinengineering.Itisvery19tomakeavigorousplausibleandjobriskingdefenseofanestimatethatisderivedbynoquantitativemethodsupportedbylittledataandcertifiedchieflybythehunchesofthemanagers.Clearlytwosolutionsareneeded.Weneedtodevelopandpublicizeproductivityfiguresbug-incidencefiguresestimatingrolesandsoon.Thewholeprofessioncanonlyprofitfrom20suchdata.Untilestimatingisonasounderbasisindividualmanagerswillneedtostiffentheirbackbonesanddefendtheirestimateswiththeassurancethattheirpoorhunchesarebetterthanwishderivedestimates.
小王购买了一个海之久牌活动硬盘而且该活动硬盘还包含有一项实用新型专利那么王某享有______
Whyis21funWhatdelightsmayitspractitionerexpectashisrewardFirstisthesheerjoyofmakingthings.Asthechilddelightsinhismudpiesotheadultenjoysbuildingthingsespeciallythingsofhisowndesign.Secondisthepleasureofmakingthingsthatareusefultootherpeople.Thirdisthefascinationoffashioningcomplexpuzzle-likeobjectsofinterlockingmovingpartsandwatchingthemworkinsubtlecyclesplayingouttheconsequencesofprinciplesbuiltinfromthebeginning.Fourthisthejoyofalwayslearningwhichspringsfromthe22natureofthetask.Inonewayoranothertheproblemisevernewanditssolverlearnssomething:sometimes23sometimestheoreticalandsometimesboth.Finallythereisthedelightofworkinginsuchatractablemedium.The24likethepoetworksonlyslightlyremovedfrompurethought-stuff.Fewmediaofcreationaresoflexiblesoeasytopolishandreworksoreadilycapableofrealizinggrandconceptualstructures.Yettheprogram25unlikethepoet’swordsisrealinthesensethatitmovesandworksproducingvisibleoutputsseparatefromtheconstructitself.Itprintsresultsdrawspicturesproducessoundsmovesarms.Programmingthenisfunbecauseitgratifiescreativelongingsbuiltdeepwithinusanddelightssensibilitieswehaveincommonwithallmen.
Observethatfortheprogrammerasforthecheftheurgencyofthepatron顾客maygovernthescheduledcompletionofthetaskbutitcannotgoverntheactualcompletion.Anomelette煎鸡蛋promisedintwominutesmayappeartobeprogressingnicely.Butwhenithasnotsetintwominutesthecustomerhastwochoices—waitsoreatsitraw.Softwarecustomershavehad16choices.NowIdonotthinksoftware17havelessinherentcourageandfirmnessthanchefsnorthanotherengineeringmanagers.Butfalse18tomatchthepatron’sdesireddateismuchmorecommoninourdisciplinethanelsewhereinengineering.Itisvery19tomakeavigorousplausibleandjobriskingdefenseofanestimatethatisderivedbynoquantitativemethodsupportedbylittledataandcertifiedchieflybythehunchesofthemanagers.Clearlytwosolutionsareneeded.Weneedtodevelopandpublicizeproductivityfiguresbug-incidencefiguresestimatingrolesandsoon.Thewholeprofessioncanonlyprofitfrom20suchdata.Untilestimatingisonasounderbasisindividualmanagerswillneedtostiffentheirbackbonesanddefendtheirestimateswiththeassurancethattheirpoorhunchesarebetterthanwishderivedestimates.
利用______可以对软件的技术信息经营信息提供保护
李某在某软件公司兼职为完成该公司交给的工作做出了一项涉及计算机程序的发明李某认为该发明是自己利用业余时间完成的可以个人名义申请专利关于此项发明的专利申请权应归属______
阅读下列说明和Java代码在n处填入适当的字句 [说明] 现欲构造一文件/目录树采用组合Composite设计模式来设计得到的类图如图10.17所示 [Java代码] importJava.util.ArrayList; importjava.util.List; 1classAbstractFile protectedStringname; publicvoidprintNameSystem.out.printlnname; publicabstractbooleanaddChildAbstractFilefile; publicabstractbooleanremoveChildAbstractFilefile; publicabstractList＜AbstractFile＞getChildren; classFileextendsAbstractFile publicFileStringnamethis.name=name; publicbooleanaddChildAbstractFilefilereturnfalse; publicbooleanremoveChildAbstractFilefilereturnfalse; publicList＜AbstractFile＞getChildrenreturn2; classFolderextendsAbstractFile privateList＜AbstractFile＞childList; publicFolderStringname this.name=name; this.childList=newArrayList＜AbstractFile＞; publicbooleanaddChildAbstractFilefilereturnchildList.addfile; publicbooleanremoveChildAbstractFilefilereturnchildList.removefile; public3＜AbstractFile＞getChildrenreturn4; publicclassClient publicstaticvoidmainString[]args //构造-个树型的文件/目录结构 AbstractFilerootFolder=newFolder"c://"; AbstractFilecompositeFolder-newFolder"composite"; AbstractFilewindowsFolder=newFolder"windows"; AbstractFilefile=newFile"TestComposite.java"; rootFolder.addChildcompositeFolder; rootFolder.addChildwindowsFolder; compositeFolder.addChildfile; //打印目录文件树 printTreerootFolder; privatestaticvoidprintTreeAbslractFileifile ifile.printName; List＜AbslractFile＞children=ifile.getChildren; ifchildren==nullreturn; forAbstractFileifile.children 5; 该程序运行后输出结果为: c:/ composite TestComposite.java Windows
[问题4]用SQL语言写出操作把数学系全体学生的成绩置零
阅读下列说明和C++代码在n处填入适当的字句 [说明] 现欲实现一个图像浏览系统要求该系统能够显示BMPJPEG和GIF三种格式的文件并且能够在Windows和Linux两种操作系统上运行系统首先将BMPJPEG和GIF三种格式的文件解析为像素矩阵然后将像素矩阵显示在屏幕上系统需具有较好的扩展性以支持新的文件格式和操作系统为满足上述需求并减少所需生成的子类数目采用桥接Bridge设计模式进行设计所得类图如图10.20所示 采用该设汁模式的原因在于系统解析BMPGIF与JPEG文件的代码仅与文件格式相关而在屏幕上显示像素矩阵的代码则仅与操作系统相关 [C++代码] classMatrix//各种格式的文件最终都被转化为像素矩阵 //此处代码省略 classimageImp public virtualvoiddoPaintMatrixm=0//显示像素矩阵m classWinImp:publicImageImp public voiddoPaintMatrixm/*调用windows系统的绘制函数绘制像素矩阵*/ classLinuxImp:publicImageImp public voiddoPaintMatrixm/*调用Linux系统的绘制函数绘制像素矩阵*/ classImage public voidsetImpimageImp*imp1=imp; virtualvoidparseFilestringfileName=0; protected: 2*imp classBMP:publicImage public voidparseFilestringfileName //此处解析BMP文件并获得…个像素矩阵对象m 3//显示像素矩阵m ; classGIF:publicImage //此处代码省略 ; classJPEG:publicImage //此处代码省略 ; voidmain //在Windows操作系统上查看demo.bmp图像文件 Image*image1=4; ImageImp*ImageImp1=5; 6 image1-＞parseFile"demo.bmp"; 现假设该系统需要支持10种格式的图像文件和5种操作系统不考虑类Matrix若采用桥接设计模式则至少需要设计7个类
Object-orientedanalysisOOAisasemiformalspecificationtechniquefortheobject-orientedparadigm.Object-orientedanalysisconsistsofthreesteps.Thefirststepis6.Itdetermineshowthevariousresultsarecomputedbytheproductandpresentsthisinformationintheformofa7andassociatedscenarios.Thesecondis8whichdeterminestheclassesandtheirattributesthendeterminestheinterrelationshipsandinteractionamongtheclasses.Thelaststepis9whichdeterminestheactionsperformedbyortoeachclassorsubclassandpresentsthisinformationintheformof10.
李某大学毕业后在M公司销售部门工作后由于该公司软件开发部门人手较紧李某被暂凋到该公司软件开发部开发新产品两周后李某开发出一种新软件该软件著作权应归______所有
FornearlytenyearstheUnifiedModelingLanguageUMLhasbeentheindustrystandardforvisualizingspecifyingconstructinganddocumentingthe26ofasoftware-intensivesystem.Asthe27standardmodelinglanguagetheUMLfacilitatescommunicationandreducesconfusionamongproject28TherecentstandardizationofUML2.0hasfurtherextendedthelanguage’sscopeandviability.Itsinherentexpressivenessallowsusersto29everythingfromenterpriseinformationsystemsanddistributedWeb-basedapplicationstoreal-timeembeddedsystems.TheUMLisnotlimitedtomodelingsoftware.Infactitisexpressiveenoughtomodel30systemssuchasworkflowinthelegalsystemthestructureandbehaviorofapatienthealthcaresystemsoftwareengineeringinaircraftcombatsystemsandthedesignofhardware.TounderstandtheUMLyouneedtoformaconceptualmodelofthelanguageandthisrequireslearningthreemajorelements:theUML’sbasicbuildingblockstherulesthatdictatehowthosebuildingblocksmaybeputtogetherandsomecommonmechanismsthatapplythroughouttheUML.
[问题2]如果将关系模式R分解为R1A#B#ER2B#CD指出关系模式R2的键并说明该关系模式最高满足第几范式在1NF～BCNF之内
[说明]某旅馆的电话服务如下可以拨分机号和外线号码分机号是从7201至7299外线号码先拨9然后是市话号码或长话号码长话号码是以区号和市话号码组成区号是从100到300中任意的数字串市话号码是以局号和分局号组成局号可以是455466888552中任意一个号码分局号是任意长度为4的数字串要求写出在数据字典中电话号码的数据条目的定义即组成
FornearlytenyearstheUnifiedModelingLanguageUMLhasbeentheindustrystandardforvisualizingspecifyingconstructinganddocumentingthe26ofasoftware-intensivesystem.Asthe27standardmodelinglanguagetheUMLfacilitatescommunicationandreducesconfusionamongproject28TherecentstandardizationofUML2.0hasfurtherextendedthelanguage’sscopeandviability.Itsinherentexpressivenessallowsusersto29everythingfromenterpriseinformationsystemsanddistributedWeb-basedapplicationstoreal-timeembeddedsystems.TheUMLisnotlimitedtomodelingsoftware.Infactitisexpressiveenoughtomodel30systemssuchasworkflowinthelegalsystemthestructureandbehaviorofapatienthealthcaresystemsoftwareengineeringinaircraftcombatsystemsandthedesignofhardware.TounderstandtheUMLyouneedtoformaconceptualmodelofthelanguageandthisrequireslearningthreemajorelements:theUML’sbasicbuildingblockstherulesthatdictatehowthosebuildingblocksmaybeputtogetherandsomecommonmechanismsthatapplythroughouttheUML.
Peopleareindulginginanillusionwhenevertheyfindthemselvesexplainingatacocktail鸡尾酒partysaythattheyareincomputersorintelecommunicationsorinelectronicfundstransfer.Theimplicationisthattheyarepartofthehigh-techworld.Justbetweenustheyusuallyaren’t.Theresearcherswhomadefundamentalbreakthroughsinthoseareasareinahigh-techbusiness.Therestofusare11oftheirwork.Weusecomputersandothernewtechnologycomponentstodevelopourproductsortoorganizeouraffairs.Becausewegoaboutthisworkinteamsandprojectsandothertightlyknitworkinggroup紧密联系在一起的工作小组wearemostlyinthehumancommunicationbusiness.Oursuccessesstemfromgoodhumaninteractionsbyallparticipantsintheeffortandourfailuresstemfrompoorhumaninteractions.Themainreasonwetendtofocusonthe12ratherthanthehumansideofworkisnotbecauseit’smore13butbecauseit’seasiertodo.GettingthenewdiskdriveinstalledispositivelytrivialcomparedtofigurineoutwhyHoraceisinabluefunk恐惧orwhySusanisdissatisfiedwiththecompanyaveronlyafewmonths.Humaninteractionsarecomplicatedandneververycrisp干脆的干净利落的andcleanintheireffectsbuttheymattermorethananyotheraspectofthework.Ifyoufindyourselfconcentratingonthe14ratherthanthe15you’relikethevaudevillecharacter杂耍人物wholoseshisKeysonadarkstreetandlooksforthemontheadjacentstreetbecauseasheexplainsThelightisbetterthere!/
ItshouldgowithoutsayingthatthefocusofUMLismodeling.Howeverwhatthatmeansexactlycanbeanopen-endedquestion.1isameanstocaptureideasrelationshipsdecisionsandrequirementsinawell-definednotationthatcanbeappliedtomanydifferentdomains.ModelingnotonlymeansdifferentthingstodifferentpeoplebutalsoitcanusedifferentpiecesofUMLdependingonwhatyouaretryingtoconvey.IngeneralaUMLmodelismadeupofoneormore2.Adiagramgraphicallyrepresentsthingsandtherelationshipsbetweenthesethings.These3canberepresentationsofrealworldobjectspuresoftwareconstructsoradescriptionofthebehaviorofsomeotherobjects.Itiscommonforanindividualthingtoshowuponmultiplediagrams;eachdiagramrepresentsaparticularinterestorviewofthethingbeingmodeled.UML2.0dividesdiagramsintotwocategories:structuraldiagramsandbehavioraldiagrams.4areusedtocapturethephysicalorganizationofthethingsinyoursystemi.e.howoneobjectrelatestoanother.5focusonthebehaviorofelementsinasystem.Forexampleyoucanusebehavioraldiagramstocapturerequirementsoperationsandinternalstatechangesforelements.
两个以上的申请人分别就相同内容的计算机程序的发明创造先后向国务院专利行政部门提出申请______可以获得专利申请权
下列标准代号中______为推荐性行业标准的代号
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