【微机原理与单片机技术】8086/8088CPU的地址总线宽度为20位，它读存储器的寻址范围为()。

80C51单片机中Vss（20）引脚是（）引脚

发光二极管正极接VCC电源，负极接P1.0口，点亮二极管需使P1.0输出低电平。()

ProfessorAshokGoelofGeorgiaTechdevelopedanartificiallyintelligentteachingassistanttohelphandletheenormousnumberofstudentquestionsintheonlineclass,Knowledge-BasedArtificialIntelligence.ThisonlinecourseisacorerequirementofGeorgiaTech’sonlineMasterofScienceinComputerScienceprogram.ProfessorGoelalreadyhadeightteachingassistants,butthatwasn’tenoughtodealwiththeoverwhelmingnumberofdailyquestionsfromstudents.Manystudentsdropoutofonlinecoursesbecauseofthelackofteachingsupport.Whenstudentsfeelisolatedorconfusedandreachoutwithquestionsthatgounanswered,theirmotivationtocontinuebeginstofade.ProfessorGoeldecidedtodosomethingtoremedythissituationandhissolutionwastocreateavirtualassistantnamedJillWatson,whichisbasedontheIBMWatsonplatform.GoelandhisteamdevelopedseveralversionsofJillWatsonbeforereleasinghertotheonlineforums.Atfirst,thevirtualassistantwasn’ttoogreat.ButGoelandhisteamsourcedtheonlinediscussionforumtofindallthe40,000questionsthathadeverbeenaskedsincetheclasswaslaunched.ThentheybegantofeedJillwiththequestionsandanswers.Aftersomeadjustmentsandsufficienttime,Jillwasabletoanswerthestudents’questionscorrectly97%ofthetime.Thevirtualassistantbecamesoadvancedandrealisticthatthestudentsdidn’tknowshewasacomputer.Thestudents,whowerestudyingartificialintelligence,wereinteractingwiththevirtualassistantandcouldn’ttellitapartfromarealhumanbeing.Goeldidn’tinformthemaboutJill’strueidentityuntilApril26.Thestudentswereactuallyverypositiveabouttheexperience.ThegoalofProfessorGoel’svirtualassistantnextyearistotakeoveranswering40%ofallthequestionsposedbystudentsontheonlineforum.ThenameJillWatsonwill,ofcourse,changetosomethingelsenextsemester.ProfessorGoelhasamuchrosieroutlookonthefutureofartificialintelligencethan,say,ElonMusk,StephenHawking,BillGatesorSteveWozniak.20.WhatdoesProfessorGoelplantodonextwithJillWatson?

如果转账支票的签发日期为2020年6月20日，那么再转账支票上应填写的出票日期应该为（）

80C51单片机的堆栈区只可设置在()。

MCS-51单片机串行端口有四种工作方式，其中方式1为()。

80C51CPU是()位的单片机。

在单片机中，通常将一些中间计算结果放在()中。

单片机80C51的XTAL1和XTAL2引脚是()引脚

下面关于8051单片机内部寄存器功能的描述，正确的为()

8051单片机中，唯一一个用户可使用的16位寄存器是()

8031单片机复位后，程序计数器P0--P3口的内容是()。

通过示波器观察ALE引脚的状态，可以大致判断MCS-51单片机是否正常工作。

toFixed()的参数设置为大于20的值可能会引起RangeError。（）