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海量资源尽在星星文库：(人工智能)usesprogramsthathelpsolveproblemsbyusinghumanknowledgeandexperience.Artificialintelligencesystemsarealsocalledexpertsystems,whichenablecomputersprogrammedwithgreatamountsofinformationto“think”aboutmanypossibilitiessuchasdiseasesthatcertainsymptoms(症状)couldindicateandmakeadecisionforthetreatment.Computersareusedinteachingaswell.Programsthatperformcomputer-aidedinstruction(CAI计算机辅助教学)aredesignedtohelpstudentsatalllevels,fromelementaryschooltotheuniversitylevel.Thestudentsitsatthecomputerterminal(终端).Theterminal’sscreendisplaysaquestionforthestudenttoanswer.Iftheansweriswrongorincomplete,thecomputermayaskthestudenttotryagain.Itthenmaysupplythecorrectanswerandanexplanation.CAIisalsousedinsomeadulteducationprogramsandaspartoftheemployee-trainingprogramsofsomebusinesscompanies.Oneofthemostimportantusesofcomputersistocommunicateinformationoverlongdistances.Theycansendinformationtoeachotherovertelephonelines.Asaresult,computerskeepbanks,newspapers,andotherinstitutionssuppliedwithup-to-the-minuteinformation.Acomputernetworkconsistsofmanycomputersinseparaterooms,buildings,cities,orcountries,allconnectedtogether.Computernetworksallowpeopletocommunicatebyusingelectronicmail(电子邮件)----adocumenttypedintoonecomputerand“sent”toanother.Suchdocumentsgeneraltravelinonlyafewminutes,eveniftheyarebeingsentoveralongdistance.Thecomputer’sabilitytoshareinformationwithothercomputersoveranetworklinkedbytelephonelinesisamajorrevolutionintelecommunications(电讯).TheInternet,aninternationalnetworkofcomputernetworks,hasspreadoutsincetheearly1990’s.TheInternetbeganasaUSnetworkofscienceandmilitary（军事）computersinthe1960’s.Nowitisaninternationalsystemforsendingandreceivingelectronicmail,software,andelectronicdocumentandpicturefilesallovertheworld.TheInternethasalreadycutthecostoflong-distancecommunicationsformanypeople.Inthefuture,itwillcompletelychangethewaypeoplework.WiththeInternet,increasingnumbersofthepeoplecanworkathomeinsteadofintheiroffice.Computersandtheirprogramsarethemostcomplex（复杂）devices（装置）inhumanhistory,andprobablythemostuseful.Modernindustrialsocietiesnowdependonthem.Ascomputersbecomemorepowerfulandwidespread,computereducationmustcontinuetoincreasealso.1.Fromthefirstparagraphwecangettoknowthat_____________.A.artificialintelligencesystemsarebeyondscientists’controlB.artificialintelligencesystemswilltaketheplaceofdoctorsC.artificialintelligencesystemswilltaketheplaceofscientistsD.artificialintelligencesystemswillunderscientists’control2.Ifyouusee-mailtocommunicatewithyourfriends,youcan__________.A,talkwithyourfriendsfreelyB.exchangeinformationwithoutpaperC.talkwithyourfriendsfacetofaceD.exchangeinformationwithoutcomputers3.Thephrase“up-to-the-minute”inthethirdparagraphmeans___________.A,shortestB,latestC.longestD.easiest4.TheInternet,accordingtothepassage,______________.A.wasfirstusedinteachingB.wasfirstbuiltbysoldiers海量资源尽在星星文库：