使用51单片机的并行I/O读取数据时，必须先向外写1。

型号为AT89C51的单片机总共有（）组I/O口。

P3口只能作为通用I/O口使用。()

在采用（）对设备进行编址的情况下，不需要专门的I/O指令组。

5.如果service已经启动，再次启动该服务时将先后调用onCreate()和onStartCommand()方法。

拉丁字母中O不可以用做定位轴线编号。

对不同素材的A和O可以同时加以肯定。

客户忠诚与客户满意之间的关系可以表示为“O=1，L=f(S)”时，表示：

客户忠诚与客户满意之间的关系可以表示为“O≠1，L=O.f(S)”时，表示：

当基尼系数G=O时，收入分配绝对不公平。

细菌的H­O变异属于

CNC装置中，I/O处理主要处理CNC控制面板开关信号，机床电气信号的输入、输出和控制

10.1.TheWorldHealthOrganizationdeclaredaglobalhealthemergencyonThursdayasthecoronavirusoutbreakspreadwellbeyondChina,whereitemergedlastmonth.2.Thedeclaration“isnotavoteofno-confidenceinChina,”saidDr.Tedros,theW.H.O.’sdirector-general.“Onthecontrary,theW.H.O.continuestohaveconfidenceinChina’scapacitytocontroltheoutbreak.”Question:Whichofthefollowingcanreplace“control”inthe“WHOcontinuestohaveconfidenceinChina’scapacitytocontroltheoutbreak?”

11.1.TheWorldHealthOrganizationdeclaredaglobalhealthemergencyonThursdayasthecoronavirusoutbreakspreadwellbeyondChina,whereitemergedlastmonth.2.Thedeclaration“isnotavoteofno-confidenceinChina,”saidDr.Tedros,theW.H.O.’sdirector-general.“Onthecontrary,theW.H.O.continuestohaveconfidenceinChina’scapacitytocontroltheoutbreak.”question:Severefloddingpromptedthegovernorto__astateofemergencyonTuesday.

16.JudgeHaltsWorkonMicrosoft’sJEDIContract,aVictoryforAmazonAfederaljudgeinWashingtonorderedMicrosoftonThursdaytohaltallworkona$10billioncloud-computingcontractforthePentagon,inavictoryforAmazon,whichhadchallengedtheawardingofthecontract.Inasealedopinion,thejudgeoftheCourtofFederalClaimsorderedworktostopontheJointEnterpriseDefenseInfrastructureproject,knownasJEDI,untilAmazon’slegalchallengewasresolved.The10-yearcontractwasoneofthelargesttechcontractsfromthePentagon,andMicrosoftwassettobeginworkonitthismonth.Thedecisionaddstotheacrimonysurroundingthelucrativedeal,whichwasamajorprizeinthetechnologyindustry,andratchetsupthelegalbattlearoundthetransformationofthemilitary’scloud-computingsystems.InDecember,AmazonfileditslegalchallengeagainsttheawardingofJEDI,sayingthatMr.Trumpused“improperpressure”onthePentagonatitsexpense.Inanothercourtfilingthismonth,Amazonarguedthataninjunctionwasnecessarytopreventitfromlosingtheprofititcouldearnfromthecontract.“ThisisallsettingthestageforamajorcourtfightbetweenAmazonandMicrosoft,withtheD.O.D.caughtinbetween,”saidDanielIves,ananalyst.“It’sapoliticalfootballthat’sbeingkickedaround.”Questionwhichofthefollowinghas"challenge"withthesamemeaningandusageasthaton"AmazonfileditslegalchallengeagainsttheawardingofJEDI"?