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下面是某同学对多项式x2﹣4x+2x2﹣4x+6+4进行因式分解的过程.解设x2﹣4x=y原式=y+
分解因式-4x2+8x-4.
因式分解x2﹣4x+4=__________.
因式分解﹣2x2+4x﹣2
分解因式2x2﹣4x+2=.
因式分解x2﹣4x+4=
因式分解x+2x+4+x2﹣4.
分解因式4x2－2x＝____________.
分解因式x2﹣4x+4=.
分解因式4x2﹣8x+4=______.
分解因式4x2－4＝_______________.
.因式分解-2x2+4x-2
分解因式2x2﹣4x+2的最终结果是
因式分解x2－4x－1
观察__同学把多项式x2＋6x＋10x2＋6x＋8＋1分解因式的过程解设x2＋6x＝y则原式＝y＋1
分解因式x3+4x2+4x
下面是某同学对多项式x2－4x+2x2－4x+6+4进行因式分解的过程.解设x2－4x=y原式=y+
下面是某同学对多项式x2－4x+2x2－4x+6+4进行因式分解的过程.解设x2－4x=y原式=y+
因式分解x－2x－4＋1
分解因式x2﹣4=x+2x﹣2.
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10分假定英语课上老师要求同桌之间交换修改作文请你修改你同桌写的以下作文.文中共10处语言错误每句中最多有两处.每处错误仅涉及一个单词的增加删除或修改. 增加:在缺词处加一个漏字符号Λ并在其下面写出该加的词. 删除:把多余的词用斜线\划掉. 修改:在错的词下划一横线并在该词下面写出修改后的词. 注意:1.每处错误及其修改均仅限一词; 2.只允许修改10处多者从第11处起不计分. TodaymoreandmoreEnglishwordsfinditswayintotheChineselanguage.EventheDictionaryofContemporaryChineseincludedmanyEnglishwords.Somepeoplesupportitandothersdonot. GenerallyI'minthefavoroftheinclusion.AsthenumberofEnglishlearnersareincreasingit'snotdifficulttounderstandtheseborrowingwordsinChinesecontexts.BesideonsomeoccasionsitismoreconvenienttouseEnglishwords.MostpeoplenowadaysuseITinsteaditstranslationxinxijishu.Inourglobevillagewecanseethatit'suncommonforonelanguagetoborrowwordsfromotherlanguages.SoIsupporttheinclusion.
规定用符号[x]表示一个实数的整数部分例如[3.69]=3．[]=1按此规定[﹣1]=．
计算－+2
计算-2xy26+-3x2y43
8分Takingatleasttwentyminutesoutofyourdaytowalkorsitinaplacethatmakesyoufeelincontactwithnaturewillsignificantlyloweryourstresshormonelevels.That'sthefindingofastudythathasestablishedforthefirsttimethemosteffectiveamountofanurbannatureexperience.Healthcareprofessionalscanusethisdiscoverytoprescribe开药nature﹣pillsintheknowledgethattheyhavearealmeasurableeffect. WeknowthatspendingtimeinnaturereducesstressbutuntilnowitwasunclearhowmuchisenoughhowoftentodoitorevenwhatkindofnatureexperiencewillbenefitussaysDr.Hunteraleadauthorofthisresearch.Ourstudyshowsthatforthegreatestpayoffintermsofefficientlyloweringlevelsofthestresshormoneyoushouldspend20to30minutessittingorwalkinginaplacethatprovidesyouwithasenseofnature. Toassisthealthcareprofessionalslookingforevidence﹣basedguidelinesonwhatexactlytodistributeHunterandhercolleaguesdesignedanexperimentthatwouldgivearealisticestimateofaneffectiveamount. Overan8﹣weekperiodparticipantswereaskedtotakeanaturepillwithadurationof10minutesormoreatleast3timesaweek.Levelsofstresshormoneweremeasuredfromsaliva唾液samplestakenbeforeandafteranaturepillonceeverytwoweeks.Thedatarevealedthatjustatwenty﹣minutenatureexperiencewasenoughtosignificantlyreducestresslevels. Healthcareprofessionalscanuseourresultsasanevidence﹣basedruleofthumbonwhattoputinanature﹣pillprescriptionsaidHunter.Itprovidesthefirstestimatesofhowna﹣tureexperiencesimpactstresslevelsinthecontextofnormaldailylife.Itbreaksnewgroundbyaddressingsomeofthecomplexitiesofmeasuringaneffectivenatureamount. 1What'sthegreatsignificanceofthestudy A.Itfindsoutanewwaytoreleasestress. B.Itcanhelpdoctorsprescribevariouspills C.Itmakesitclearthatexercisecanhelpreleasestress. D.Itfindsouttheaccurateamountofnatureexperience. 2HowdidHuntergetthefinding A.Byworkingwithsomedoctors. B.Byaskingparticipantsquestions. C.Bycarryingoutanexperiment. D.Bycomparingthepreviousdata. 3WhatdidHunterthinkoftheresultofthestudy A.Ithasdrawbacks. B.It'smeaningful. C.It'sworthresearchingfurther. D.Itneedsmorediscussions. 4What'sthemainideaofthetext A.Naturehascloserelationshipwithstress. B.Weshouldstayinnaturetokeephealthy. C.Wecannotgetclosetonaturefrequently. D.Stayinginnatureforpropertimewilllowerstresslevel.
25分假定你是李华你的美国笔友Mark本学期开始选修汉语课程.最近他给你发来电子邮件询问如何学好汉语.请给他回一封邮件针对如何学好汉语提一些建议. 注意:1.词数100左右; 2.可适当增加细节以使行文连贯; 3.开头语已给出不计入总词数. DearMark Iknowfromyoure﹣mailthatyouarelearningChinesethissemesterandaskmeforsomeadvice. Yours LiHua
计算
8分When45﹣year﹣oldRandyPauschwasdiagnosedwithpancreatic胰腺cancerhechosetofocusonlivingratherthandying.AsacomputerscienceprofessoratCarnegieMellonUniversityPauschwasaskedtodeliveralastlecture.Thiswell﹣knowncampustraditionallowedprofessorstoshareworldlywisdomwithstudentsasiftheyweredyingandhadonelastlecturetogive. TheonlydifferenceinPausch'scaseisthatPauschreallywasdyingbutitonlymotivatedhimmore.HedeliveredhislastlectureReallyAchievingYourChildhoodDreamsonSept.182007. Pauschbeganbysharingseveralofhisboyhooddreamssomeofwhichhehadachievedandtheothershehadn't.Hedescribedtheimportanceofhavingdreamsandhowanyonecanstilllearnalotbyreachingforthosedreamseveniftheydon'talwayssucceed.Hesharedthevalueslearnedthroughexperiencewhichhehopedtopassontoothers:honestycharacterhardworklaughterandgratitude. Pausch'slastlecturereceivedagreatdealofpraiseandattention.ItbecameacrazyYou﹣TubehitandinOctober2007hepresentedanabridged删节的versiononTheOprahWinfreyShow.Heturnedthelectureintoabookbythesamenamewhichquicklybecameabest﹣seller.Readersweredeeplymovedbythebook'srepresentationofPausch'slifelongphilosophyandthewayitrevealedthebiggestsourceofhismotivation﹣histhreeyoungchildren. PauschpassedawayonJuly252008buthisvoicelivesonintherecordedlectureandhisbook.Hecontinuestomotivateusallbyencouragingustonevergiveupourchildhooddreams﹣asourceofinspirationthatcanneverrundry. 1WhywasPauschaskedtogivehislastlecture A.Tosharewisdomwiththestudents. B.Tomakehimhaveabetterlife. C.Tocurehiscancer. D.Toachievehisdream. 2WhatwasPausch'slecturemainlyabout A.Hisprivatelifeinboyhood. B.Havingdreamsandgoodvalues. C.Thereasonforhissuccess. D.Theexperiencelearnedfromothers. 3WhichofthefollowingmotivatedPauschmost A.Hischildren. B.Hisdreams. C.Hiswork. D.Hisstudents. 4Whatcanbethebesttitleforthetext A.TheMeaningofLife B.KeeponDreaming C.MotivationfromLife D.GivetheLastLecture
10分Scotlandisagreatplacetospendaholiday.Ifyouseeminterestedinvisitingthisremarkablecountry1!Hereisadetailedhow﹣toonspendingthatperfectholidayinScotland! Packyournecessaryitemsaswellassomeotheronestoo.Mapsarealmostessentialtofindyourwayaroundthehillsorforests.Suncreamisnecessaryintheheartofsummer.Remembertotakeacameratoeithercapturethestunninglandscapesortotakepicturesofyouandyourfamily. 2.Airportsarepresentinthemaincitiesandsomeotherplacesandtherearetaxiswaitingbothattheseairportsandtrainstations.ManyScottishcoachtripsareonofferandacarjourneyisanalternativechoice. Findthebestplacestoeat.Scotlandhasmanydeliciousrestaurantsandcafesindifferentlocations.3.Scottishclassicslikesouppotatoesandice﹣creamareallpresentbutmaybenotallinonedishtogether! Visitthesportingfacilities.AlthoughScotlandisarelativelysmallcountry4. Swimmingfootballjudoandathleticsarepopularsports.Footballisprobablytheonethatmostpeoplewatchortakepartin.ThereisavarietyofstadiumsalloverScotlandsomewithacapacityofupto60000people. Trynottobedisappointedwhenyoucomehome.Scotlandwillalwaysbethereagaintomorrowwiththehillswaitingforyouthecitiesluring引诱youtotheirshopsandthecountrysideattractingyoutohaveawalkwithit.Makethemostoutofyourjourneyand5. A.Planyourtransport B.thenlooknofurther C.Decideonwhereyouwanttostay D.Seafoodcanbeapopularmenuitemlikesteaksare E.letitbecomeapossibilityforfurtherholidaysandvisits F.itisagreatcountryforsportandmanydifferenttypesofittoo G.EverycityandtowninScotlandhassomesortofgalleryormuseum
30分SeveralnightsagoIwaslyinginbedexperiencingadreamthatIchosetokeepclosetomyheartforever.Anelderlystrangerapproachedmewithaninviting1.Hisdeepcomfortingvoicemademe2hiseveryword.Hislaughmadehimseemfullof3andsomewhatgrandfather﹣like.Iinstantlysensedafeelingof4betweenmeandthiswiseoldman.AshespokeIlistened.Hetoldmeofhis5ofunpleasantrapmusicwhileIattemptedtoconvincehimthatmodernartcanbebeautifultoo.He6meofthegoodolddayswhichItoldhimthatImissedtoo.SuddenlyIdetectedtearsfalldownhisroughunshavencheeks.Igrew7andaskedhimwhyhewascrying.Heassuredmenotto8becausehewascryingwithjoy.Iaskedwhatwasmakinghimso9.HetoldmethatIremindedhimofhis10whenhetoowasoncefullofaneagernesstolearn.Myfriendthenwhisperedan11thattouchedmedeeply.HesaidAmomentwilldisappearsoonunlessyoumakeit12.Hetaughtmetoliveinthemomentwhichisfartoo13tothrowaway.Thisoldman14totellmethattheworldisfullofnewwonderstoexplore.Hetaughtmetobe15howeverstupidtheymaysound.Headvisedmetoreadanyandallbooksbecauseyouneverknowwhenthe16mayhelpyoulaterinlife.Mostimportantlyhetoldmenevertostop17.Unlikemy18companionmyfuturestillawaitsme.Iwillsoonbefilledwith19thoughtsandemotions.ThereisnodoubtinmymindthatIwilltrytodiscoverandnever20forIamawarethatmyambitionwillcarrymetothetop.1A.view B.Picture C.letter D.smile2A.comment B.trust C.judge D.repeat3Awisdom B.wonder C.imagination D.complaint4Ashame B.meaning C.balance D.relationship5A.hope Bdisapproval C.pleasure D.development6A.cheated B.informed C.reminded D.warned7A.interested B.relieved C.concerned D.disappointed8A.believe Bleave C.wait D.worry9A.upset B.awkward C.delighted D.desperate10A.youth B.future C.decision D.service11A.effect Badvantage C.promise D.statement12A.complex Boriginal C.unforgettable D.understandable13A.normal Bprecious C.unexpected D.universal14A.chose B.desired C.continued D.happened15A.curious B.patient C.efficient D.successful16A.dialogue B.travel C.experience D.knowledge17A.traveling Bdreaming C.developing D.combining18A.aged B.common C.helpful D.devoted19A.new B.sincere C.reliable D.unbelievable20A.putoff B.giveup C.turnaround D.getback
计算的结果是
如图在数轴上标注了四段范围则表示2的点落在
计算×=
计算
6分TimeforanadventureHavealookatourexcitingrangeofholidayanddecidewhattypeofadventureyou'dlike. Polarexpeditions TakeacruisetoAntarcticaorthenorthernArctic;explorealandofwhitenaturalbeautyandwonderfulwildlife.OurexpertswillexplaineverythingaboutthetwopolesasyouwatchthepenguinsinAntarcticaorwhalesandpolarbearsintheArctic.There'snogreateradventurethantravellingtotheendsoftheearth.Aonce﹣in﹣a﹣lifetimeexperience! Culturaljourneys Ourculturaljourneyswillhe]pyoudiscoverancientcivilizations:IndiaThailandEgyptandmanymore.Visittemplespalacesandancientruins﹣justremembertobringyourcamera!Gettoknowlocalwaysoflifebyexploringmarketstryingexoticfoodsandmeetinglocalpeople. Trekkingtours WehavetrekkingholidaystofamousplacessuchasMachuPicchuortheEverestBaseCampTrekaswellassomenearertohomeintheHighlandsofScotland.Youdon'tneedtobeverysportyjustfairlyfit.Youllhaveagreattimeenjoyingnaturewithagroupofnewfriends.Someoftheholidaysincludecampingbutwe'lltransportthetentforyou. Wildlifeholidays Weorganisesmall﹣grouptourstogetclosertonatureinAfricaAsiaorSouthAmerica.GoonsafariinAfricaandwatchlionsandgiraffes.MeetthefamousturtlesoftheGalapagosIslands.LookfortigersortakeanelephantsafariinSriLanka.Weuselocalguidesandstayinrangeofaccommodationfromtentstotreehouses. 1Whatcanyoudoonpolarexpeditions A.Trydifferentsports B.Seewhales. B.Climbmountains D.Meetlocalpeople. 2Whatareyouadvisedtobringonculturaljourneys A.Camera B.Tents. C.Specialshoes. D.Alocalguide. 3Onwhichholidaysdoyouneedtobereasonablyfit A.Polarexpeditions B.Culturaljourneys C.Trekkingtours D.Wildlifeholidays
2-的绝对值是
已知2n=a5n=b20n=c试探究a2bc之间有什么关系．
方程的解是
8分Precipitationisthenameforanykindofwaterthatfallsfromthesky.Rainsnowandhailarealltypesofprecipitation.Precipitationformsintheclouds. Cloudsformwhenwaterparticlesintheairjointogether.Theseparticlescanbeliquidorfrozen.Itdependsontheairtemperature.Groupsofliquidwaterdropletsinacloudarecalledclouddroplets. Asingleclouddropletistiny.Thedropletsgetbiggerandheavierastheyclumptogether.Whentheygettooheavytheyfallasrain. Sometimesacloudformswheretheairisbelowfreezing.Thiscausesthewaterinsidethecloudtofreeze.Thesefrozendropletsarecalledsnowcrystals.Snowcrystalsclumptogethertoformsnowflakes.Eventuallytheflakesbecometooheavy.TheyfalltotheEarthassnow. Airtemperatureaffectsprecipitation.Itcancausefallingsnowflakestomelt.Itcancreatefreezingrainandsleet.Coldtemperaturescancausechunksoficetoformintheair.Thesechunksoficeareknownashail. Freezingrainoccurswhenwarmandcoldaircometogether.Firstasnowflakefallsfromaverycoldcloud.Thenitpassesthroughalayerofwarmerair.Thiscausesittomelt.Itthenpassesthroughanotherlayerofcoldair.Thismakesitverycoldagain.Freezingraindoesnothaveenoughtimetorefreezebeforeithitstheground.StillItwillimmediatelyturntoiceifitfallsontoacoldobject.Thiscouldbeastreetoratreebranch.Sleetstartsthesamewayasfreezingrain.Thereisadifferencethough.Withsleetthemeltedsnowflakeshavetimetorefreezebeforetheyland. Hailisanotherkindofprecipitation.Itformsduringseriousstorms.Strongwindsblowsnowflakesandraindropshighintothesky.Uphightheairisverycold.Thecoldairfreezesthewaterintochunksofice.Eachtimethewindsblowtheicechunksup.theygrowlarger.Thiscancontinueuntiltheiceistooheavyforthewindtolift.TheicechunkscanbeverybigwhentheyfalltotheEarth.Theycoulddentcars. 1Whichansweroptiongoesthirdintheprocessthatmakesrain ①Waterparticlesjointogether. ②Dropletsformacloud ③________ ④Clouddropletsfallasrain. A.Waterpassesthroughwarmair. B.Windsblowwaterdropletsup. C.Coldairfreezesclouddroplets. D.Dropletsgetbiggerandheavier. 2Howisfreezingraindifferentfromsnow A.Freezingraincanfallduringastorm. B.Freezingrainstartshighintheclouds. C.Freezingrainissnowthatmeltsandgetscoldagain. D.Freezingrainturnsintowaterorsnowwhenitiswarm. 3Snowflakesthatmeltandrefreezebeforetheylandcause. A.heavysnow B.freezingrain C.hail D.sleet 4Whydoeshailfreezeaccordingtothepassage A.Windsblowwateruphighintoverycoldair. B.Itturnstoicewhenitfallsonacoldobject. C.Meltedsnowflakesrefreezebeforetheyland. D.Crystalsgettooheavyandfallquicklyasice.
计算
计算
8分Poetssongwritersandleft﹣wingpoliticianshatetheideabutfordecadesopinion﹣pollevidencehasbeenclear:moneybuyshappinessandthericheryouarethemorelikelyyouaretoexpresssatisfactionwithyourlife.Untilnowasurveyof43countriespublishedonOctober30thbythePewResearchCentreshowsthatpeopleinemergingmarketsarewithinawhiskerof一步之遥expressingthesamelevelofsatisfactionaspeopleinrichcountries.Itisinlinewiththestandardviewofhappinessandincomeseensofar. Accordingtothesurveyin200757%ofrespondentsinrichcountriesregardedthemselvesashappy;inemergingmarketsthesharewas33%;inpoorcountriesonly16%﹣aclassicexpressionofthestandardview.Butin201754%ofrich﹣countryrespondentscountedthemselvesashappywhereasinemergingmarketsthepercentagejumpedto51%. ThesharpincreasehappenedthankstohugeimprovementsincountriessuchasIndonesia+35andPakistan+22.In12ofthe24emergingmarketshalformorepeopleratetheirlifesatisfactioninthetopoftheladder. Thisisnottosaythelinkbetweenincomeandsatisfactionhasbeensnapped.Poorcountriesstilllagbehind:onlyaquarterofthepeopletherecountthemselvesashappy﹣halftheleveloftheothertwogroups.Thereisalsoaclearlinkbetweenhappinessandincomegrowth.China'sGDProseatanannualaveragerateof10%in2007﹣2017anditshappinesslevelrose26points. Withincountriesricherpeopleexpressmoresatisfactionthantheirpoorerneighbors.Thestudydividedrespondentsintocategorieswithhigherandlowerincomesandfewerandmorehouseholdgoods.Ineverycountryineverygroupricherfolkwithmoregoodsexpressedhigherlevelsofhappiness.Soatapersonallevelmoneydoesbuyhappiness.Andifyouaskpeopleaboutdifferentaspectsoftheirlives﹣healthfamilylifereligionstandardofliving﹣itturnsoutthatsatisfactionwithlivingstandardsstillhasthebiggestinfluenceonhappiness. 1What'sthestandardviewofhappinessandincome A.Incomeisnotcloselyrelatedtohappiness. B.Happinessdoesnotdependonhowmuchyouearn. C.Thehigheryourincomeisthemorelikelyyouwillfeelsatisfied. D.Themoreyouaresatisfiedthemoreyoucanearneverymonth. 2Whatcontributedtotheincreaseofhappinessinemergingmarkets A.Theirrapiddevelopment. B.Investmentinemergingmarkets. C.Economicdownturn. D.Morecooperationwithrichcountries. 3What'sthepurposeofthewriterbymentioningChina'sGDP A.ToprovethatChina'sGDPgrowthledtothehappinessofpeopleinAsia. B.ToremindreadersoftheprogressthatChinahasmade. C.Toexpresstheauthor'sconcernaboutthedevelopmentofemergingmarkets. D.Toshowthatthereisalinkbetweenhappinessandincomegrowth. 4Whatistheauthor'sattitudetothestandardviewofhappinessandincome A.Disappointed. B.Skeptical C.Supportive. D.Indifferent.
30分Alittleboyalmostthoughtofhimselfasthemost1childintheworldbecausepoliomyelitis小儿麻痹症madehisleglameandhisteethugly.Heseldomplayedwithhis2;andwhentheteacheraskedhimtoanswerquestionshealways3hisheadwithoutaword. Onespringtheboy'sfathertoldhischildrentoplantasapling树苗eachpersoninfrontofthehouse.ThefathersaidtothechildrenWhosesaplinggrows4Iwillbuyhimorherafavoritegift.Theboyalsowantedtogethisfather'sgift.Butseeinghisbrothersandsisters5watertowaterthetreesmerrilyanyhowhe6anidea:hehopedthetreeheplantedwoulddiesoon.Sowateringitonceortwicehenever7toit.Afewdayslaterwhenthelittleboywenttoseehistreeagainhewassurprisedtofinditnotonlydidn'twiltbutalsogrewsome8leavesand9withthetreesofhisbrotherandsisterhisappearedgreener.Hisfather10hispromiseboughtthelittleboyhisfavoritegiftandsaidtohim:fromthetreeheplantedhewouldbecomea/an11botanistwhenhegrewup.Sincethenthelittleboyslowlybecame12.Onedaythelittleboylayonthebedbutcouldn'tsleep.Lookingatthebrightmoonlightoutsidethewindowhesuddenly13whatthebiologyteacheroncesaidplants14growatnight.WhynotgotoseethetreeWhenhecametothecourtyardontiptoehefoundhisfatherwassplashing15underhistree.Allofasuddenheunderstood:hisfatherhadbeen16fertilizinghissmalltree！Hereturnedtohisroom17runningdownhisfacewithoutrestraint克制.Decadespassed.Thelittleboydidn'tbecomeabotanistbuthewaselectedPresidentoftheUnitedStates.HisnamewasFranklinRoosevelt. Loveisthebestnourishmentoflife;18itisjustadropofclearwateritcanmakethetreeoflifethrive茁壮成长.Maybethattreeisthinorwitheredbutaslongasthereisnourishmentof19itcanflourishandeven20toweringtrees. 1A.innocent B.awesome C.unfortunate D.intelligent 2A.classmates B.parents C.teachers D.leaders 3A.nodded B.lowered C.tapped D.raised 4A.fastest B.steadily C.lowest D.best 5A.pumping B.carrying C.holding D.drinking 6A.foundout B.putforward C.hitupon D.gaveout 7A.said B.applied C.attended D.recognized 8A.muddy B.fresh C.attractive D.juicy 9A.connected B.satisfied C.marked D.compared 10A.kept B.made C.broke D.forgot 11A.unimportant B.outstanding C.merciful D.significant 12A.pessimistic B.realistic C.impractical D.optimistic 13A.recovered B.accomplished C.distinguished D.recalled 14A.generally B.scarcely C.extremely D.abruptly 15A.nothing B.anything C.something D.everything 16A.openly B.unfriendly C.painfully D.secretly 17A.raindrops B.tears C.floods D.sweats 18A.asif B.sothat C.evenif D.asaresultof 19A.love B.sympathy C.syndrome D.hatred 20A.growinto B.gothrough C.lookinto D.referto
计算
15分Whenitcomestosnailsthefirstthingyouthinkofisaslowanimalwithaheavyshell.Butinfactwhenyoutake1secondlookit'sclear2thislittlecreaturehassome3trueawesomesecrets. Accordingto4researchfromtheUniversityofPortsmouthintheUKsnailshavemanystrongteeth. Scientistsfoundthatasnailhasarectangular矩形tonguein5itmouthwithnumeroustinyteeth.Thereareupto135rowsofthematmostwitheachrow6have105teeth.Thus.thenumberofteethasnailhas7beabout14000thelargestnumberamonganyanimal. Theseteeth8makefromproteinreinforced加固byfinemineralnanofibers纳米纤维.Itmakestheteeth40percent9strongthanthestrongestspidersilkandclose10thestrengthofthestrongesthuman﹣madematerials. Nowresearchersarelookingtomimic模拟thematerialtomakethenextgenerationofracingcarsorairplanesCBSnewsreported.
计算2x4·x3的结果等于
计算=
8分USPresidentDonaldTrumponFridaycalledontheUStoaccelerate5Gdeployment部署.Theraceto5GisaraceAmericamustwinTrumpstressedWewanttobetheleaderinthis.Trumpsaidthat5Gnetworksmustbeguardedfromtheenemy﹣andwedohaveenemiesoutthere.Itshouldbeprivatesectordrivenandprivatesectorledbuthisadministrationisremovingregularitybarrierstothebuildoutofnetworks.Trumpalsovowedtoextendbroadbandaccesstoruralareaandnomatterwhereyouareyouwillhaveaccessveryquicklyto5GTrump'swordsremindusoftheUScompetitionwiththeSovietUnionduringtheColdWar.TheUS'overtcrackdown__onHuaweiiscloselyrelatedtothecountry's5Gstrategicdeployment.WhilesuppressingChina'stelecomgianttheUSismobilizingitsown5Gdevelopment.Washingtonisquitenarrow﹣minded.ChinesecompaniesincludingHuaweiandZTEhavedevelopedtheir5Gtechnologyinlinewiththemarketrules.Theymayhaveneverpreparedforstatecompetitionsnorharboredambitionstochallengetheglobalgeopoliticallandscape.Thoselow﹣keyChineseenterprisesaimatdoingbetterandmakingmoremoney.Theypursuetechnologicalleadershipmerelytosurviveanddevelop.Itisexaggeratingtoregard5Gdevelopmentasadecisivefactorinnationalcompetitions.Washingtonislaunchinganationalmobilizationtodevelop5Gtechnology.Theapproachisliketakingagreatleapforwardwhichisnotcool﹣headed.UStechnicalmobilizationabilityisundoubtedlystrong.Howeverthecorecompetitivenessoftheinternetliesnotonlyintechnologybutalsoinapplicationconditions.AsmoreandmorepeoplefloodintocitiesChinahasadenseurbanpopulationwithahighaverageusagerateofbasestationsmakingChina'snetworkinfrastructurefullofmarketdrivingforce.TheUSshouldgiveupthefantasytobeanall﹣roundchampioninthe5Gera.AlthoughitwillstillleadintheoveralltechnologicallevelinthelongrunthecountryshouldacceptthefactthatitwillbesurpassedbyChinaincertainspecificfieldsof5G.TobeanormalpowerfulcountrytheUSmustfirsthaveabroadmind.1WhichwordscanbestdescribeTrump'scharacterA.narrow﹣mindedandaggressiveB.cool﹣headedandpeace﹣lovingC.considerateandfullofambitionD.determinedandimaginative2What'sthemainreasonfortheUS'overtcrackdownonHuaweiA.Huaweihasdevelopedits5Gtechnologyagainstthemarketrules.B.TheUSwantstobetheleaderin5G.C.HuaweihasearnedmoredollarsthanApple.D.Huaweidoesn'tkeepalowkeyprofileindealingwithAmericanbusinessmen.3WhatcanweinferfromthepassageA.TheUSisanabnormalpowerfulcountryineveryaspectintheworld.B.AndroidappismorepowerfulandusefulthanIOSappwith5G.C.WithmoreandmoresubscribersinthecityChinahasanadvantageindeveloping5G.D.TheUSwillleadintheoveralltechnologicallevelinthelongterm.4WhatcanbeasuitabletitleforthetextA.WherethereisasmartphonethereisaHuaweiB.ANewEra:5GTechnologyC.ALongWaytoGoforHuaweiD.UStoLaunch‘GreatLeapForward'Campaignin5G
求下列各式中未知数的值x-63=-27
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高一下学期数学
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