雨课堂学堂云在线《信息与通信技术》单元测试考核答案

注：不含主观题第1题Whatisinformation?()ASignalBDataCMessageDKnowledgeENoneofabove正确答案：BCD第2题Whatiscommunication?()AInformationspreadingBInformationprotectionCInformationexchangeDInformationsharingENoneofabove正确答案：ACD第3题NarrowsenseofITismainlyabout()AComputersystemsBElectronicsystemsCElectricalsystemsDNoneofabove第4题Inspiredbybraincomputerinterface(BCI),whatcanwelearnaboutIT?()AITequalsBCIBBCIishighlevelITCBCIbelongstoITDIThasbroadsenseEMonkeyisascleverasIT(猴精)第5题WhatisthebiggestchallengetoICTinyourmind?()AHighcostBHighcomplexityCInformationislandDDelayofinformationsharingERelativelylowpenetrationFShortageoftalentsGInsufficientinvestmentinR&D第6题Wirelesschargingisnotakindofcommunicationsincenoinformationistransmitted。()第7题Molecularcommunicationisakindofcommunication。()第8题WhatarefeaturesoftheseancientcommunicationsystemssuchasChineseBeaconTowerandFlagSemaphore?()AWirelesscommunicationBVisualsignalCShortrangeDMultiplehopsECodingschemeFNoneofabove正确答案：ABDE第9题Whatisthemainframeworkofcommunication?()AWirelesstrunklineismainstreamin20thcenturyBWiredsubscriberlineissupplementaryin20thcenturyCWirelesstrunklineismainstreamin21thcenturyDWirelesssubscriberLineismainstreamin21thcentury正确答案：AD第10题Commercial3GsystemsinChina?ChinaTelecomadopted____,ChinaUnicomadopted____,ChinaMobileadopted____.正确答案：:["CDMA2000"]正确答案：:["WCDMA"]正确答案：:["TD-SCDMA"]第1题Whichbelong(s)tosenseorgansofhumanbeings?AEyeBEarCTongueDMouthESkinFNoseGNoneofabove正确答案：ABCEF第2题WhatareICTtools?AGlassesBArtificialSkinCBrainpacemakerDCochlearImplantENoneofabove正确答案：BCD第3题Whichstatementiscorrect?ABrainwaveisdigitalsignalBBrainwaveisquantizedsignalCBrainwaveisanalogsignalDBrainwaveissampledsignal第4题Whichis/arecorrect?AThesamesignalcanconveydifferentinformationBThesamesignalcannotconveydifferentinformationCDifferentsignalcanconveythesameinformationDDifferentsignalcannotconveythesameinformationENoneofabove正确答案：CA第5题Whichiscorrectfortheperformancemetricofcommunications?AReliabilityisaboutdatarateBComplexityisaboutthehardwarecostCEffectivenessisabouthowfasttheinformationcanbetransmittedDNoneofabove第6题Whichiscorrect?ASignalspeedisthesameasinformationspeedBBothsignalandinformationcanbemeasuredCBothsignalandinformationareuncountableDNoneofabove第7题Pleasevoteoneofthefollowingstatement?AInformationcouldbemeasuredsimilarlytosignalBInformationismuchmorecomplexthansignalCInformationdoesnotphysicallyexistDNotsure第8题HowtounderstandAlbertEinstein'famoussaying"YoubelieveinaGodwhoplaysdice,andIincompletelawandorder"?AEinsteinbelievesGodBEinsteinbelieveslawandorderCEinsteinbelievesthatGoddoesnotplaydiceDNoneofabove第9题Informationhelpstonarrowdowntheuncertaintyby____.正确答案：:["observation"]第10题Thefewestquantityofinformationis____.

正确答案：:["zero"]第11题Self-informationisalinearfunctionoftheeventprobabilities。第12题Whichis/arecorrect?ALogarithmicisanincreasingfunctionBLogarithmicisandecreasingfunctionCHigherprobabilityindicateshighself-informationDHigherprobabilityindicateslowself-informationESelf-informationcouldbenegativeFSelf-informationmustbenon-negativeGNoneofabove正确答案：ADF第13题Rolltwofairsix-sideddiceAandB.WhatistheprobabilitythatA=3giventhatA+B≤5?A1/5B3/10C2/5DNotsure第14题Rolltwofairsix-sideddiceAandB.WhatistheprobabilitythatA=2or3giventhatA+B≤5?A1/2B3/5C4/5DNotsure第15题Entropyisaweightedaverageofself-informationofdifferentmessages。第1题Entropyisaweightedaverageofself-informationofdifferentmessages。第2题Entropyisaweightedaverageofself-informationofdifferentmessages。第3题Entropyisaweightedaverageofself-informationofdifferentmessages。第4题Entropyisaweightedaverageofself-informationofdifferentmessages。第5题Entropyisaweightedaverageofself-informationofdifferentmessages。第6题Entropyisaweightedaverageofself-informationofdifferentmessages。第7题Entropyisaweightedaverageofself-informationofdifferentmessages。第8题Entropyisaweightedaverageofself-informationofdifferentmessages。第9题Entropyisaweightedaverageofself-informationofdifferentmessages。第10题Entropyisaweightedaverageofself-informationofdifferentmessages。第11题Entropyisaweightedaverageofself-informationofdifferentmessages。第12题Entropyisaweightedaverageofself-informationof