- 问题详情:Wearebusywiththemid-termexam,sowehavenotime TV theeveningofNov.16. A.towatch;on B.towatch;in C.watching;on D.watching;in【回答】A知识点:相似相近词比较题型:选择题...
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- 问题详情:交变电压的瞬时值为u=Umsin100πt(V),当t=s时,u=5V,则从电压表上看到的读数为()A.V B.5VC.10V D.10V【回答】解析:选D.将t=s及u=5V代入u=Umsin100πt(V),可以求得最大值Um=10V,有效值为10V...
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- 问题详情:----What do you think of the TV sitcom The Big Theory? ----It’s __________ I like watching it . A boring B funny C surprising D terrible【回答】...
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- 问题详情:Wecanlearn fromTV,butwecan’twatch TV. A.lotsof,toomuch B.alotof,toomany C.alot,toomuch D.alot,muchtoo【回答】C知识点:相似相近词比较题型:选择题...
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- 问题详情: Hisaunt TV. A.likewatch B.likeswatching C.likeswatch 【回答】B 知识点:动词和动词短语题型:选择题...
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- 问题详情:我国南方山区的小水库有丰富的水力资源,有一个水力交流发电机在正常工作时,电动势e=310sin50πtV,由于洪涝,水库水位暴涨,为加快泄洪,水轮带动发电机的转速增加0.4倍,若其他条件不变,则电动势e′=________。【回答】434sin70πt(V)知识点:交变电流题型:填空题...
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- 问题详情:如图所示,相线A、B、C和中*线N接在三相交流电源上,AB间的线电压U=380sin100πtV,则()A.相线的电势总是高于中*线的电势B.电流表的示数为sin100πtAC.B、N两端电压的有效值为220VD.通过R的电流方向每秒钟改变50次【回答】解析:选C.在三相交流电路中,相线与中*线间的电势差按...
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- 问题详情:由交流电动势瞬时值表达式e=10sin4πt(V),可知A.此交流电的频率是4π(Hz) B.此交流电的周期是0.5sC.当t=0.5s时,此交流电动势有最大值D.当t=0时,产生此交流电的线圈平面与中*面重合【回答】BD知识点:交变电流题型:多项选择...
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- 1、Wecanassembletheprovidedpartsandcomponentsintocolortvset.2、ThenexttimeIbuyatvset,Iamgotobuyaportablemodel3、apolecarryinganoverheadmicrophoneprojectedoverafilmortvset.4、Wepayforthetvsetininstallmentof100dollaramonthforfivemonth5、DoubleBedSuitee...
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- 问题详情:如图所示,一正弦交流电瞬时值为e=220sinl00πtV,通过一个理想电流表,接在一个理想变压器两端,变压器起到降压作用.开关闭合前后,AB两端输出的电功率相等,以下说法正确的是 A.流过r的电流方向每秒钟变化50次 B.变压器原线圈匝数小于副线圈匝数 C.开关从断开到闭合时,电流...
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- towedunderwaterTV-camerasystemTheapplicationforthisimageSensoriswide.anditscharacteristicsparameters.forexample.resolutionfactorandlookangle.arebetterthanFUT-7modelunderwaterTVmadeinJapan....
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- 问题详情:TV PROGRAMESChannel1 Channel218:00AroundChina 21:00Englishfortoday18:30Children'sprogram ...
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- 经典语录一生败在太没钱,不敢爱她太明显。...
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- 1、WhocareswhathappensonrealityTV,whenrealityisslippingbyoutside?2、JadeGoody,arealityTVstar,diedonMarch22nd,aged27.3、LethertrytosuddenlywriteaboutrealityTVormodelsorCharlieSheen.4、WatchrealityTVshowsthatinvolverealhousewives,dancingC-listcelebriti...
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- 经典语录佐藤·达广(男主):”现在你只是在逃避,沉浸在美妙的梦幻中,不敢正视现实。“小林·友(小林·惠的欧尼):”没想到会被你说教。“佐藤·达广:”什么?“小林·友:“说到不敢正视现实,你我都一样吧。今后该怎么做,怎么做才能好转,其实心里都明白。自我启发书已经读了两百多本,自己也...
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- IncaseofsatelliteTVbroadcasting,asatelliteTVbroadcastingsystemcoveringthewholeworldandasatelliteTVeducationsystemcoveringthewholecountryhavebeenestablished.Chinahasabout189,000satelliteTVbroadcastingreceivingstations....
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- ThenewAppleTVisamajorhardwareupgrade.JobsactuallydidtrythesamethingwithAppleTV.AppleunveiledasupereasywaytoconnectaniPad2toaTVusingAppleTV.GoogleTVinterestslumped11pointsto33%whileAppleTVdropped10pointsto30%.Thenewproductintroductionsstartedwithanewa...
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- 问题详情:一台旋转电枢式交流发电机,在正常工作时的电动势e=220√2sin100πt(V),由于超负荷使得电枢转速降低了1/10,这时的电动势是( )A.e=220√2sin100πt(V) B.e=220√2sin90πt(V)C.e=198√2sin100πt(V) D.e=198√2sin90πt...
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- aTVprogrammefortinytotsThe(audience)ratingofaTVprogrammeItwantsideasforanewTVprogramme.NotsolongagofindingaTVprogrammewaseasy.IwaswatchingtheTVprogrammewhenthetelephonerang.ThatismuchbetterthanwatchingabadTVprogramme!两个人吵架,最后终究有一个人先认输...
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- 问题详情:—Doesyourfatherplaysports?—No,heonlywatchesTV. in on on in【回答】B知识点:相似相近词比较题型:选择题...
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- 问题详情:如图*为电热毯的电路图,把电热毯接在U=311sin100πtV的电源上,电热毯被加热到一定温度后,通过装置P使输入电压变为乙所示的波形,从而进入保温状态,若电热丝电阻保持不变,此时交流电压表的读数是:________.【回答】156V解析:电压表的示数为有效值据有效值的定义有:·T=·∴U===1...
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- distributionequipment[cableTV]IfthecableTVinembarrassingposition?B:Sure.DoyouhavecableTVinChina?AusefulanalogyisthefamiliarcableTVbox.CanyouinstallcableTVonmyPC?Forone,thecableTVindustryhasyettogetonboardwiththenewdigitalTVstandards.Legalinstitutions...
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- 问题详情:I can only watch TV forhalf _____ hour every evening. A.a B. an C. the D. / 【回答】B知识点:冠词题型:选择题...
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- 问题详情:如图所示,一理想变压器原、副线圈匝数之比为5:1,原线圈电压u=311sin100πt(V),电阻R1=20Ω,R2=24Ω,电流表和电压表为理想电表。下列说法中正确的是A.电压表V1的示数约为311VB.电流表A1的示数约为0.20AC.电压表V2的示数约为44VD.电流表A2的示数约为1.4A【回答】B知识点:变...
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- 问题详情:单项选择IliketowatchbasketballgamesTV. 【回答】A知识点:介词和介词短语题型:选择题...
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