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一只不透明的口袋里装有1个红球、1个黄球和2个自球，这些球除颜色外其余都相同． （1）从口袋中摸出一个球是白球的概率是 ． （2）搅匀从口袋中任意摸出2个球，用画树状图或列表格的方法，求摸出...
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一只不透明的袋子中有1个白球1个红球和2个黄球这些球除颜色不同外其它都相同搅均后从中任意摸出1个球摸
在一只不透明的口袋中放入红球6个黑球2个黄球n个.这些球除颜色不同外其它无任何差别搅匀后随机从中摸出
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在一只不透明的口袋中放入红球6个黑球2个黄球n个这些球除颜色不同外其它无任何差别.搅匀后随机从中摸出
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在一只不透明的口袋中放入红球6个黑球2个黄球n个这些球除颜色不同外其它无任何差别搅匀后随机从中摸出一
一个不透明的口袋里装有红白黄三种颜色的乒乓球除颜色不同外其余都相同其中有2个白球1个黄球.若从中任意
一只不透明袋子中装有1个红球2个黄球这些球除颜色外都相同小明搅匀后从中意摸出一个球记录颜色后放回搅匀
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在一个不透明的口袋里装有1个红球2个白球和n个黄球这些球除颜色外其余都相同.若从该口袋中任意摸出1个
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一个不透明的口袋里装有红白黄三种颜色的乒乓球除颜色外其余都相同其中有白球2个黄球1个若从中任意摸出一
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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-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.
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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
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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
15分Itdoesn'ttakelongtobelieveourownliesaccordingtoanewstudy. LastyearatBrandeisUniversity42participantsabouthalfseniorsandhalfmillennials千禧一代weregivenaformwith102questionsabout1theydidthepreviousday.Theformaskedthemtorespond2questionssuchasDidyousetyouralarmclockandDidyouuseaforktoeatlunchOnhalfthequestions3chooseatrandomtheresearcherstoldtheparticipantstolie.Forty﹣fiveminuteslatertherespondentsanswered4samequestionnaire.Thistimeresearcherstoldthemtoanswerallthequestions5truthful. Thecentralresearchquestionwas:Whentheparticipantsliedonaquestionthefirsttimedidtheythenrememberthey6lie Theresultsshowedthattheoldergroupweresignificantlymorelikelythantheyounger7acceptasthetruthalietheyhadtoldlessthananhour8early. Olderadultshavemore9difficultdistinguishingbetweenwhat'srealandnotrealsaidLauraPaige10wastheleadauthorofthestudyOncetheybelievealieitwillcreateanewmemoryforsomethingthatdidn'thappen.
8分Itiscalculatedthatsomeoftheworld's7000languagesareindangerofgettingextinct.ForexampleAinualanguageinJapanisnowseriouslythreatenedwithonly10nativespeakersremainingsaidleadstudyauthorTatsuyaAmanoattheUniversityofCambridgeinEngland.Thescientistsfoundthat25percentoftheworld'slanguagesarethreatened.Afteridentifyingwheretheendangeredlanguagesweretheylookedforanyenvironmentalandsocialoreconomicfactorsthoselanguagesmighthaveincommonsuchaspoorareasorrapidpopulationgrowth.Wefindthatattheglobalscalelanguagespeakerdeclines减少arestronglylinkedtoeconomicgrowth﹣thatisdeclinesareparticularlyoccurringineconomicallydevelopedregionsAmanosaid.OneimportantfindingofthisnewstudyisthatlanguagesinthetropicsandHimalayanregionarelikelytobeincreasinglythreatenedinthenearfuturebecausetheseregionsstillhavemanylocalindigenouslanguages本地语withasmallnumberofspeakersandatthesametimeareexperiencingrapideconomicgrowthAmanosaid.Economicgrowthmayendangerlanguagesforavarietyofreasons.Forinstancespeakersofendangeredlanguagesmayviewanothermorepopularlanguageasofferingeconomicopportunitiesandthusforegotheirownlanguages.Thereareotherimportantfactorsthatmightendangerlanguagestheresearcherssaid.Forinstancepoliciesregardinghowlanguagesareusedandtaughtinschoolscanbeverydifferentamongcountriesandevenwithineachcountryandthesefactorsmayexplainmoredetailedpatternsinlanguageendangerment.Amanosuggesteditcouldbepossibletoforecastfuturethreatstothediversityoflanguages.ThereexistsdetailedinformationonfuturechangesintheenvironmenteconomiesandclimatesAmanosaid.Usingsuchinformationtogetherwiththefindingsofthisstudyandfurtheranalysiswewouldliketounderstandwhatwillhappentotheworld'slanguageswhereitwillhappenandwhichlanguageswillbethreatenedinparticular.1WhyisthelanguageofAinumentionedinParagraph1A.ToshowthatitismostlikelytodisappearinthefutureB.ToprovethatJapaneseisnowseriouslythreatenedC.ToshowthatfewpeoplespeakJapaneseintheworldD.ToprovethatJapaneseismadeupofmanylanguages2WhatmayendangerthelanguagesmostaccordingtoAmanoA.Thediversityofsociety.B.Thedeclineofthepopulation.C.Theimprovementoftheenvironment.D.Thedevelopmentofeconomy.3WhatdoestheunderlinedwordforegoprobablymeanA.Employ.B.Desert.C.Record.D.Advance.4WhatcanbeinferredfromthelastparagraphA.Theworld'slanguagesaredevelopingatarapidspeed.B.Thestudymaybeofuseinstoppinglanguagesdyingout.C.Itisratherhardforustoprotectthediversityoflanguages.D.Futurethreatstothediversityoflanguagesareunpredictable.
如图在数轴上标注了四段范围则表示2的点落在
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
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.文中共有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∧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. IstillrememberitwasasummernightwhenIwastobe5yearsoldmydadandIwenttothelargestshoppingmallinourcountytobuyamachine﹣gunformybirthdaygiftthatIhadbeenlookingforwardtoobtain.Afterbuyingthegunandanythingelsemydadhadmerely10Yuanleft.Steppingoutofthemalltothestreetmydadpromisedtocallataxitotakeustohome.Wewereabouttocallataxihoweverwhilealittlebeggarinragscameuptousseeminglyofmyage. Shylyhereachedouthisdirtyhandtoaskmoney.Mydadofferedhimthe10YuansmilingandIimmediatelygavethenewly﹣boughtguntohimwithoutanyhesitations. Theboynoddedtousrunningawaymerrily.Withnomoneytocallataximydadliftmeontohisshoulderswalkinghometiredbuthappily.
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
10分Somechildrendosomehouseworksuchassweepingthefloordoingdishestakingouttherubbishandsoon.1. Thelogicbehindtyingrewardstohouseworkisclear.2.Sotheyshouldpaykidstodotheirjobs.Payingkidsforhouseworkisoneofthemosthotlydebatedparentingtopics. Manypeopleareinfavorofthispractice.Theybelievethatgettingrewardsmotivateskidstodohouseworkanditalsoteachesthemrealworldlessonsabouthowweneedtoworktoearnmoney.OurgoalistoencouragekidstoearnrewardssaysChrisBergmanfounderofChoreMonster.3. 4.SusieWaltonaparentingeducatorandfamilycoachbelievesthatbyrewardingkidsparentsaresendingamessagethatworkisn'tworthdoingunlessyougetsomethinginreturn.5sincehomeisalivingspaceforeveryoneinthefamily.It'simportantforkidstoseethatweallhaveresponsibilitiesinthehouseandthatfamiliesdecidetogetherhowtheywanttheirhometolookandhowtheyaregoingtokeepitlookinglikeeveryonewantsittolookSusiesaid. A.Butsomepeoplethinkotherwise. B.Grownupsgetpaidtodotheirjobs. C.Payingkidsissendingabadmessage. D.Inexchangetheygetsomepocketmoney. E.Howeverotherpeoplesubscribetotheview. F.Runninganykindofhouseholdisateameffort. G.Kidsneedpositiverewardstohelpmotivatethem.
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
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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