• 2021-04-14 问题

    PartIIICloze(20points,1pointeach)Directions:Thereare20blanksinthefollowingpassage.ForeachblanktherearefourchoicesmarkedA,B,CandDbelowthepassage.YoushouldchoosetheONEthatbestfitsintothepassage.ThenmarkthecorrespondingletterontheAnswerSheetwithasinglelinethroughthecenter.April1stisadayonwhich,insomecountries,peopletrytoplaytricksonothers.Ifone___61__intrickingsomeone,onelaughsandsays:“AprilFool!”andthenthepersonwhowastricked__62__laughs,too.OneApril1st,acountrybuswasgoingalonga__63__roadwhenit__64__downandstopped.Thedriver__65__turnedswitchesandpressedbuttons,butnothinghappened.__66__heturnedtothepassengerswitha__67__lookonhisfaceandsaid:”Thispoorbusisgetting__68__.Itisn’tgoingaswellasitusedto.Thereisonlyonethingtodoifwewanttogethometoday.I’ll__69__three.Iwantyouallto__70__forwardsuddenlyashardasyoucan.Thisshould__71__thebusstartedagain,butifitdoesn’t,I’mafraidthere’snothingelseIcando.Now,allofyouleanbackas__72__asyoucaninyourseatsandgetready.”Thepassengersallpressedbackagainsttheirseatsandwaited__73___.Thenthedriverturnedtohis__74__andasked:”Areyouready?”Thepassengers__75__hadenough__76__toanswer:“yes.”“One!Two!Three!”countedthedriver.Thepassengersallleantforwardsuddenly---andthebusstarted__77__atagreatspeed.Thepassengersbreathedmore__78__andbegantosmilewithrelief.Buttheirsmileturnedto__79__andlaughterwhenthedriver__80__cried:“AprilFool!”51.A.interestedB.enjoysC.succeedsD.joins52.A.sadlyB.hardlyC.usuallyD.also53.A.windingB.ice—coveredC.highD.city54.A.spedB.brokeC.slowedD.settled55.A.anxiouslyB.happilyC.carelesslyD.nervously56.A.ButB.ThenC.BecauseD.Therefore57.A.satisfiedB.calmC.worriedD.sad58.A.moreexpensiveB.oldC.poorerD.weak59.A.askB.shoutC.giveD.count60.A.goB.leanC.lookD.get61.A.getB.causeC.allowD.more62.A.farB.longC.suddenD.hardly63.A.calmlyB.patientlyC.angrilyD.anxiously64.A.backB.sideC.seatD.front65.A.onlyB.barelyC.clearlyD.possibly66.A.strengthB.forceC.breathD.interest67.A.upB.offC.outD.forward68.A.easilyB.hardC.comfortablyD.often69.A.happinessB.troubleC.surpriseD.disappointment70.A.friendlyB.aloudC.quietly

    PartIIICloze(20points,1pointeach)Directions:Thereare20blanksinthefollowingpassage.ForeachblanktherearefourchoicesmarkedA,B,CandDbelowthepassage.YoushouldchoosetheONEthatbestfitsintothepassage.ThenmarkthecorrespondingletterontheAnswerSheetwithasinglelinethroughthecenter.April1stisadayonwhich,insomecountries,peopletrytoplaytricksonothers.Ifone___61__intrickingsomeone,onelaughsandsays:“AprilFool!”andthenthepersonwhowastricked__62__laughs,too.OneApril1st,acountrybuswasgoingalonga__63__roadwhenit__64__downandstopped.Thedriver__65__turnedswitchesandpressedbuttons,butnothinghappened.__66__heturnedtothepassengerswitha__67__lookonhisfaceandsaid:”Thispoorbusisgetting__68__.Itisn’tgoingaswellasitusedto.Thereisonlyonethingtodoifwewanttogethometoday.I’ll__69__three.Iwantyouallto__70__forwardsuddenlyashardasyoucan.Thisshould__71__thebusstartedagain,butifitdoesn’t,I’mafraidthere’snothingelseIcando.Now,allofyouleanbackas__72__asyoucaninyourseatsandgetready.”Thepassengersallpressedbackagainsttheirseatsandwaited__73___.Thenthedriverturnedtohis__74__andasked:”Areyouready?”Thepassengers__75__hadenough__76__toanswer:“yes.”“One!Two!Three!”countedthedriver.Thepassengersallleantforwardsuddenly---andthebusstarted__77__atagreatspeed.Thepassengersbreathedmore__78__andbegantosmilewithrelief.Buttheirsmileturnedto__79__andlaughterwhenthedriver__80__cried:“AprilFool!”51.A.interestedB.enjoysC.succeedsD.joins52.A.sadlyB.hardlyC.usuallyD.also53.A.windingB.ice—coveredC.highD.city54.A.spedB.brokeC.slowedD.settled55.A.anxiouslyB.happilyC.carelesslyD.nervously56.A.ButB.ThenC.BecauseD.Therefore57.A.satisfiedB.calmC.worriedD.sad58.A.moreexpensiveB.oldC.poorerD.weak59.A.askB.shoutC.giveD.count60.A.goB.leanC.lookD.get61.A.getB.causeC.allowD.more62.A.farB.longC.suddenD.hardly63.A.calmlyB.patientlyC.angrilyD.anxiously64.A.backB.sideC.seatD.front65.A.onlyB.barelyC.clearlyD.possibly66.A.strengthB.forceC.breathD.interest67.A.upB.offC.outD.forward68.A.easilyB.hardC.comfortablyD.often69.A.happinessB.troubleC.surpriseD.disappointment70.A.friendlyB.aloudC.quietly

  • 2022-06-01 问题

    for i in range(b.max_row): for j in range(b.max_column): print(b.cell(row=i,column=j).value)上面语句运行的结果是:__________。 A: 1 1 1 1 1 1 1 1 1 1 B: 1111111111 C: 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 D: 出现异常

    for i in range(b.max_row): for j in range(b.max_column): print(b.cell(row=i,column=j).value)上面语句运行的结果是:__________。 A: 1 1 1 1 1 1 1 1 1 1 B: 1111111111 C: 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 D: 出现异常

  • 2021-04-14 问题

    【单选题】CDMA通信的基站,假定基站A的码片序列是+1 +1 +1 -1 -1 +1 -1 -1,基站发射bit为101时,实际发射的信号是 A. +1 +1 +1 -1 -1 +1 -1 -1 +1 +1 +1 -1 -1 +1 -1 -1 –1 –1 –1 +1 +1 –1 +1 +1 B. +1 +1 +1 -1 -1 +1 -1 -1 –1 –1 –1 +1 +1 –1 +1 +1 +1 +1 +1 -1 -1 +1 -1 -1 C. +1 +1 +1 -1 -1 +1 -1 -1 +1 +1 +1 -1 -1 +1 -1 -1 +1 +1 +1 -1 -1 +1 -1 -1 D. –1 –1 –1 +1 +1 –1 +1 +1 –1 –1 –1 +1 +1 –1 +1 +1 –1 –1 –1 +1 +1 –1 +1 +1

    【单选题】CDMA通信的基站,假定基站A的码片序列是+1 +1 +1 -1 -1 +1 -1 -1,基站发射bit为101时,实际发射的信号是 A. +1 +1 +1 -1 -1 +1 -1 -1 +1 +1 +1 -1 -1 +1 -1 -1 –1 –1 –1 +1 +1 –1 +1 +1 B. +1 +1 +1 -1 -1 +1 -1 -1 –1 –1 –1 +1 +1 –1 +1 +1 +1 +1 +1 -1 -1 +1 -1 -1 C. +1 +1 +1 -1 -1 +1 -1 -1 +1 +1 +1 -1 -1 +1 -1 -1 +1 +1 +1 -1 -1 +1 -1 -1 D. –1 –1 –1 +1 +1 –1 +1 +1 –1 –1 –1 +1 +1 –1 +1 +1 –1 –1 –1 +1 +1 –1 +1 +1

  • 2022-06-01 问题

    for i in range(1,11): for j in range(1,11): b.cell(row=i,column=j).value=1 #b是一个工作表对象for i in range(1,11): for j in range(1,11): print(b.cell(row=i,column=j).value,end=" ") print()上面程序代码运行的结果是()。 A: 1 B: 1 1 1 1 1 1 1 1 1 1 C: 1111111111 D: 1 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 1

    for i in range(1,11): for j in range(1,11): b.cell(row=i,column=j).value=1 #b是一个工作表对象for i in range(1,11): for j in range(1,11): print(b.cell(row=i,column=j).value,end=" ") print()上面程序代码运行的结果是()。 A: 1 B: 1 1 1 1 1 1 1 1 1 1 C: 1111111111 D: 1 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 1

  • 2022-10-25 问题

    下列哪个码片序列不能用于CDMA通信 A: ( -1 -1 -1 +1 +1 -1 +1 +1 ) B: ( -1 -1 +1 -1 +1 +1 +1 -1 ) C: ( -1 +1 -1 +1 +1 -1 -1 -1 ) D: ( -1 +1 -1 -1 -1 -1 +1 -1 )

    下列哪个码片序列不能用于CDMA通信 A: ( -1 -1 -1 +1 +1 -1 +1 +1 ) B: ( -1 -1 +1 -1 +1 +1 +1 -1 ) C: ( -1 +1 -1 +1 +1 -1 -1 -1 ) D: ( -1 +1 -1 -1 -1 -1 +1 -1 )

  • 2021-04-14 问题

    请仔细观察下面行列式的计算过程,如果四个等号都理解了,请选择A,否则请选择B。 | a 1 1 1 1 | |a+4 a+4 a+4 a+4 a+4| | 1 a 1 1 1 | | 1 a 1 1 1 | | 1 1 a 1 1 |= | 1 1 a 1 1 | | 1 1 1 a 1 | | 1 1 1 a 1 | | 1 1 1 1 a | | 1 1 1 1 a | | 1 1 1 1 1 | | 1 a 1 1 1 | =(a+4) | 1 1 a 1 1 | | 1 1 1 a 1 | | 1 1 1 1 a | | 1 1 1 1 1 | | 0 a–1 0 0 0 | =(a+4) | 0 0 a–1 0 0 | | 0 0 0 a–1 0 | | 0 0 0 0 a–1 | =(a+4)(a–1)^4

    请仔细观察下面行列式的计算过程,如果四个等号都理解了,请选择A,否则请选择B。 | a 1 1 1 1 | |a+4 a+4 a+4 a+4 a+4| | 1 a 1 1 1 | | 1 a 1 1 1 | | 1 1 a 1 1 |= | 1 1 a 1 1 | | 1 1 1 a 1 | | 1 1 1 a 1 | | 1 1 1 1 a | | 1 1 1 1 a | | 1 1 1 1 1 | | 1 a 1 1 1 | =(a+4) | 1 1 a 1 1 | | 1 1 1 a 1 | | 1 1 1 1 a | | 1 1 1 1 1 | | 0 a–1 0 0 0 | =(a+4) | 0 0 a–1 0 0 | | 0 0 0 a–1 0 | | 0 0 0 0 a–1 | =(a+4)(a–1)^4

  • 2021-04-14 问题

    共有4个站进行码分多址通信。4个站的码片序列为:a:(-1 -1 -1 +1 +1 -1 +1 +1) b:(-1 -1 +1 -1 +1 +1 +1 -1) c:(-1 +1 -1 +1 +1 +1 -1 -1) d:(-1 +1 -1 -1 -1 -1 +1 -1) 现收到这样的码片序列:(-1 +1 -3 +1 -1 -3 +1 +1),则( )发送1。

    共有4个站进行码分多址通信。4个站的码片序列为:a:(-1 -1 -1 +1 +1 -1 +1 +1) b:(-1 -1 +1 -1 +1 +1 +1 -1) c:(-1 +1 -1 +1 +1 +1 -1 -1) d:(-1 +1 -1 -1 -1 -1 +1 -1) 现收到这样的码片序列:(-1 +1 -3 +1 -1 -3 +1 +1),则( )发送1。

  • 2022-06-09 问题

    共有四个站进行CDMA通信,现收到这样的码片序列(-3 +1 -1 -1 +1 +1 +1 -3),则下列站点发送了数据1的是( ) A: (-1 -1 -1 +1 +1 -1 +1 +1) B: (-1 -1 +1 -1 +1 +1 +1 -1) C: (-1 +1 -1 +1 +1 +1 -1 -1) D: (-1 +1 -1 -1 -1 -1 +1 -1)

    共有四个站进行CDMA通信,现收到这样的码片序列(-3 +1 -1 -1 +1 +1 +1 -3),则下列站点发送了数据1的是( ) A: (-1 -1 -1 +1 +1 -1 +1 +1) B: (-1 -1 +1 -1 +1 +1 +1 -1) C: (-1 +1 -1 +1 +1 +1 -1 -1) D: (-1 +1 -1 -1 -1 -1 +1 -1)

  • 2022-06-09 问题

    共有四个站进行码分多址CDMA通信。四个站的码片序列为:A(-1 -1 -1 +1 +1 -1 +1 +1) , B(-1 -1 +1 -1 +1 +1 +1 -1) , C(-1 +1 -1 +1 +1 +1 -1 -1), D(-1 +1 -1 -1 -1 -1 +1 -1) , 现在收到这样的码片序列:(-1 -1 +1 +1 +3 +3 -1 -1 )

    共有四个站进行码分多址CDMA通信。四个站的码片序列为:A(-1 -1 -1 +1 +1 -1 +1 +1) , B(-1 -1 +1 -1 +1 +1 +1 -1) , C(-1 +1 -1 +1 +1 +1 -1 -1), D(-1 +1 -1 -1 -1 -1 +1 -1) , 现在收到这样的码片序列:(-1 -1 +1 +1 +3 +3 -1 -1 )

  • 2021-04-14 问题

    A、B、C三个站点采用CDMA技术进行通信,A、B要向C发送数据,设A的码片序列为+1,-1,-1,+1,+1,+1,+1,-1。则B可以选用的码片序列为: -1,+1,-1,+1,-1,+1,+1,+1|-1,+1,-1,+1,-1,+1,-1,+1|-1,+1,-1,-1,-1,+1,+1,+1|-1,-1,-1,+1,-1,+1,+1,+1

    A、B、C三个站点采用CDMA技术进行通信,A、B要向C发送数据,设A的码片序列为+1,-1,-1,+1,+1,+1,+1,-1。则B可以选用的码片序列为: -1,+1,-1,+1,-1,+1,+1,+1|-1,+1,-1,+1,-1,+1,-1,+1|-1,+1,-1,-1,-1,+1,+1,+1|-1,-1,-1,+1,-1,+1,+1,+1

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