首页
试卷库
试题库
当前位置：
X题卡
>
所有题目
>
题目详情
解下列方程，看看谁算的又快又准！2(0.5x-1)-0.3(x+2）=-0.5
查看本题答案
包含此试题的试卷
教案备课库《》真题及答案
点击查看
你可能感兴趣的试题
解下列方程看看谁算的又快又准！13+x=45+x
按要求解下列方程x2+x-3=0公式法
解下列方程看看谁算的又快又准！3x-5=5x-3-x
解下列方程0.4x2-0.8x=1
用配方法解下列方程:1x2+5x－1=0
用公式法解下列方程x2－6x－2＝0
解下列方程x2－4x－12＝0
解下列方程:3x2+x-2=0;
解下列方程:4x-32=25;
解下列方程12-39-x=5x-4-77-x;
解下列方程3x+2x+3=x+14
解下列方程2x2﹣4x﹣1=0.
解下列方程:x2+6x-10=0配方法.
用配方法解下列方程1x2＋4x＋1＝0
用适当的方法解下列方程2x2+x-15=0;
用配方法解下列方程x2＋5x－1＝0
用配方法解下列方程2x2＋1＝3x
用配方法解下列方程4x2-4x-1=0
解下列方程1-3x2+22x-24=0
用配方法解下列方程2x2＋1＝3x.
热门试题
更多
1Whatmustyoudoifyoudriveane﹣bikelegallyinChangzhouafterApril152019?A.Buyanewe﹣BikemeetingthenewnationalstandardbeforeApril15209.B.Paytoregisteryourunlicensede﹣BikebeforeApril152019.C.Takeoutthird﹣partyliabilityinsuranceforyoure﹣BikebeforeApril152019.D.Obtainane﹣BikenumberplateoratemporarypermitcurdbeforeApril152019.2Fromtheannouncementweknowthat.A.thetransitionperiodforregistrationisfiveyearslongB.sixillegaltrafficbehaviorswillbespeciallyinvestigatedC.hightechnologywillbeusedforlawenforcementonthespotD.theannouncementismadeforthesakeofeconomicdevelopment
DotherightThingInlifepeoplefeelmostsatisfiedwhentheychooseoptionsthatsidewiththeirmostdeeplyvalues.Here'showtostaytruetoyours.Ifyouhopetohaveyourlifeshapedaccordingtoyouridealsyouhavetoknowwhatthoseidealsare.Perhapsbeginsessionsbyidentifyingtheconceptsthataremostimportantfromalisthonestystructurefamilyandsoon.Thosequalitiesareinfluencedbyyourparents.yourcultureandsocietyasawholebutyouhavetotakeownershipofyourowndecisions.Almostallofthesequalitiesarethingsmostofusdesiretoholddear.Todeterminewhichprinciplesaremorethanjustdesiresreflectonsituationsthatresonatetngwithyourself.Identifyingyourvalueswillguideyouintherightdirectionbutafewstrategiescanhelpyoufollowthrough.Beforeyoumakeabigdecisiondosomethingthatwillputyouinhighspiritsexercisesocializewithfriendsvolunteer.Researcherstheorizethatsuchactivitiesimproveourmoodwhichpromotesdopaminelevelsincertainareasofthebrainimprovingourcognitiveabilitiesandhelpingusweighdifferentoptions.Troubleisthetoughestdecisionsoftenarriveatthemostinconvenienttimes.whenyou'reunderforce.askafamilymember.afriendor.incertaincasesaprofessionalforadvice.Theycanprovideadvicethat'snotslightlyinfluencedbytheworkdeadlineorleakyroofgraduallyweakeningyourmentalenergy.Ofcourse.peoplemakedecisionsthatcontradicttheiridealsallthetime.TherearelotsofvaluesweholddearandtheyfrequentlycomeintoconflictwithoneanotherIt'snotsomuchthatpeopledon'tknowwhattheywantit'sthattherearemanythingswedesireandwedon'talwaysknowhow.Whileasingledecisioncanseemlikeatug﹣of﹣warbetweencompetingdesiresbroaderlifechoicesdon'tneedtobeadefinitiveeither/orquestion.Onewholikestravelingworldwidemighttemporarilyputoffagrandtriptoexplorelocationsclosertohomeorcommittosettingasidetimeforvacationwiththeirfamilyeverysummernomatterwhatelsecomesup.Surroundyourselfwithpeoplewhobesidessharingyourpassioncanalsopreventyoufromhesitating.AgroupcanremindyouHeyweredoingthisbecauseweloveit.'Ifyou'restillstruggling.evenafterseekingoutcommunitysupportthere'snoshameinrevisingyourcorevalues.Ifyou'redeterminedtotakepartinacharityprogrambutspendtheeveningwithfriendsinsteaditmaybetimetoacceptthatfriendshipismoreimportanttoyouthanvolunteerism.Betteryetfindopportunitiestocontinuethecharityprogramwithyourfriends.Youmaylearnthatwhatyoubelievedwasacorepriorityactuallyhasmuchmoretodowithlivinguptowhatyourparentsco﹣workersorothersexpect.Ifyourvaluesagreewithwhoyoureallyarenoiewillhavetoaskyoutomakethosechoices.
Addingtotheirhappinesshesayssomesimilaritiesbetweenthetwotestpapers.A.is B.are C.has D.have
ImproveYourCraftWithTheseHelpfulGuidesDIYMFAITEM#T7995ByGabrielaPereiraRETAIL﹩19.99ONLINEPRICE﹩8.99.DIYMFAisthedo﹣it﹣yourselfaltemativetoaMasterofFineArtsincreativewriting.BycombiningthethreemaincomponentsofatraditionalMFA﹣writingreadingandcommunity﹣itteachesyouhowtocraftwonderfulstoriesengageyourreadersandpublishyourwork.TroubleshootingyournovelByStevenJamesITEMT9747RETAIL﹩19.99ONLINEPRICE﹩10.99Inthishands﹣oneasy﹣to﹣useguideaward﹣winningauthorStevenJamesprovideshelpfultechniquesandcheckliststimesavingtricksofthetradeandhundredsofquestionsforanalysisandrevisionoftheoriginalwork.MakeasceneByJordanRosenfeldITEN#R4981RETAIL﹩I7.99ONLINEPRICE﹩9.99*AakeaScenetakesyoustep﹣by﹣stepthroughtheelementsofstrongsceneconstructionanddemonstrateshowtheessentialaspectsofawonderfulstory﹣includingcharacterlotanddramatictension﹣functionwithintheframeworkofindividualscenes.DamnFineStoryITEM#R1990ByChuckWendiRETAIL﹩18.99ONLINEPRICE﹩12.99Greatstorytellingismakingreaderscareaboutyourcharactersthechoicestheymakeandwhathappenstothem.Andtotelladamnfinestoryyouneedtounderstandwhyandhowthatcaringhappens.UsingamixofpersonalstoriespopfictionexamplesandtraditionalstorytellingtermsNewYorkTimesbestsellingauthorChuckWendigrillhelpyouinternalizethefeelofpow.※Salespriceslistedonthelinecanbediscountedasmuchas80%withlargequantities.VisittheWDShopatwritersdigest.comformoreinformation.1Whodoesthebestincombiningtheauthorsownlifeexperiencesinwriting?A.GabrielaPereiraB.StevenJamesC.JordanrosenfeldD.ChuckWendig2Howmuchmaybesavedifastudentbuysonebookonlinetoimprovehiscompletedwork?A.﹩11.B.﹩9.C.﹩7.2D.﹩4.8
﹣Thedressonthefashionshowisreallybeautiful! ﹣Youbet.Don'tyouthinkitwillsoonafteritisputontothemarket? A.carryon B.callon C.counton D.catchon
AlarmingheadlinessuggestoneinfourteenagegirlsintheUKareself﹣harmingmotivatedbysexdiscriminationandpressurestolookgoodinaselfie自拍society.ThesestoriescomefromareportbyUKcharityTheChildren'sSocietybasedonanongoingsurveyof11000childrenaged14.Amongthegirls22percentsaidtheyhadself﹣harmedwhileboys9percent.Butwhilethetermself﹣harmimprovesimagesofteenagerscuttingthemselvesthatmaythankfullybeonlythemostextremeendofabroaderrange.Inthissurveyparticipantsweremerelyaskediftheyhad'hurtthemselvesonpurposeinanyway.Somecouldhaveansweredyesforthingslikepunching击拳awallindissatisfactionordeliberatelygettingfalling﹣downdrunk.Otherscouldhavethoughtthequestionincludedmentalhurt.Suchself﹣destructivebehaviourwouldnaturallybeofconcerntoparents.butwouldn'tbethatunusualforteenagers.MaxDavieahealthpromotionofficerdoesbelievethatself﹣harmamongteensissomewhatontherise﹣﹣butthinksthequestioninthissurveywasnotspecifenoughtorevealitsrealuniversality.Thelatestheadlinesjoinanongoingaccountaboutamentalhealthcrisisintoday'syouth.SomeblamecutbacksinsocialserviceswhileotherspointtoalooseningofsexualstandardsteensatriskForthosecautiousofnewtechnologiesitissocialmediaorthelatestpopularcomputergames.Butsuchreportsalsodeservesomeskepticism.Claimsofhighratesofdepressionareusuallybasedonsurveyswithveryloosenon﹣medicalcriteria.Thankfullyclinicaldepressionisstillrareinthisagegroup.Infactadifferentandregularlyrepeatedsurveyhasfoundnochangein11﹣to﹣15﹣year﹣old'shappinesswithlifeasawholebetween1995and2016Nordidtheirsatisfactionwiththeappearancechangewhichmakesitstrangetoblametheselfieculturefortheapparentself﹣harmincrease.ThissurveycalledUnderstandingSocietyevenfoundimprovementinhappinesswithfamilyandschoolworkoverthatperiod.ThesemoreoptimisticfindingswerealsointhelatestChildren'sSocietyreportbutwereburiedatthebottomoftheirpressrelease.Daviethinkstheriseinself﹣harmmaynotbeduetoariseinunhappinessbutsimplythatthisagegroupnowseesself﹣harmasamoreculturallyacceptablewaytoexpressextremesufferings.'itmaybethatpreviouslypeopledidn'tknowthatthiswassomethingyoucoulddo.Ifpeoplearetalkingaboutsomethingandnormalizingitit'sprobablymorelikelythattheirpeerswilldoit.'Ifthatisthecaseitisallthemorereasonnottomakeself﹣harmseemmorecommonthanitreallyis.1InresponsetothesurveyreportedbyTheChildren'sSocietytheauthorbelieves.A.thesurveyisunscientificasitaskedveryspecificquestionsB.theself﹣destructivebehaviorforteensisworryingtoparentsC.thenumberofself﹣harmingteensisalarmingbecauseofselfiesD.theimagesofteens'self﹣harmarebecomingmorespecific2WhatdoesMaxDaviethinkofself﹣harmamongteenagers?A.Thesituationistooworrying.B.Theriseissomewhatbeneficial.C.Theproblemisactuallywidespread.D.Thephenomenonisnotsouniversal.3WhatcanweknowfromthesurveycalledUnderstandingSociety?A.Teenagersinthepastlivedahappierlife.B.Selfiecultureisresponsiblefortheincreaseofself﹣harm.C.Thereisnoconnectionbetweenself﹣harmandselfie.D.Withselfieteenagersaremoresatisfiedwiththeirappearance.4Thelasttwoparagraphsmainlyimplythat.A.self﹣harmresultsfromtoomuchpressureB.self﹣harmistheresultofsocialdevelopmentC.teensneedcorrectguidancefromtheoutsideD.teensshouldavoidfollowingpeersexamples
AmongallthetouristattractionsinSydneythemagnificentOperaHouseistheshiningstar.OntheedgeofBennelongPointatongueoflandstickingoutintoSydneyHarborthisUNESCOWorldHeritageSiteconsistsofacomplexofroofsshapedlikehugeshellsorbillowingsailsthatmixbeautifullywithitswaterfrontlocation.Todayvisitorscanadmirethegreatbeautyofthebuilding.Muchmorethananoperahousethestructureencompasses包含theatersstudiosaconcerthallrehearsalandreceptionroomsrestaurantsandaspectacularopen﹣airforecourtoverlookingtheharborandcity.AmericanarchitectLouisKahnoncesaid'Thesundidnotknowhowbeautifulitslightwasuntilitwasreflectedoffthisbuilding.'TipsandTacticsBookseatsforproductionswellinadvance.Performancescommencepromptlysovisitorsshouldallowenoughtimetoaccessthebuildingcollectticketsandstowcloakslargebagsandjackets.Considerenjoyingamealinoneoftherestaurantstoenjoythestunningharborviews.OneofthebestsitestophotographtheOperaHouseisMrs.Macquarie'sChairintheRoyalBotanicGardensorfromthewateraboardaharborcruise.GettingtotheSydneyOperaHouseVisitorscancatchaSydneyBustravelbyCityRailorhopaboardaSydneyFerrytoCircularQuaywhichisa5to7minutewalkfromtheSydneyOperaHouse.Afreeshuttlebusforelderlyandmobility﹣challengedpatrons顾客runsbetweenCircularQuaynearStandEundertheCahillExpresswayandtheVehicleConcourse.BikeparkingisavailableundertheSydneyOperaHouseMonumentalSteps.Wilson'sSydneyOperaHouseCarParkislocatedat2MacquarieStwithvehicleaccessnexttotheSydneyOperaHouseForecourt.AdmissionTicketpricesvaryfromattractiontoattraction.LocationBennelongPointSydney.1WhichofthecharacteristicsofSydneyOperaHousemightattractvisitorsmost?A.Itshistoricalcontext.B.Itsuniquearchitecture.C.Itswaterfrontlocation.D.Itssuperbharborviews.2IfyouareavisitortoSydneyOperaHouseyoucan.A.takeaferrydirectlytoSydneyOperaHouseB.rideafreeshuttlebuswithoutanyrestrictionsC.takeanequallygoodphotofromanyangleD.driveacarto2MacquarieStandparkthere
Ts是一种人工合成的超重化学元素元素符号为Ts元素名称为下列说法正确的是
TheurgetoshareourlivesonsocialmediaPeoplehavelongusedmediatoseereflectionsofthemselves.Longbeforemobilephonesorevenphotographydiarieswerekeptasawaytounderstandoneselfandtheworldinwhichonelives.Inthe18thand19thcenturiesasdiariesbecamemorepopularmiddle﹣classNewEnglandersparticularlywhitewomenwroteabouttheireverydaylivesandtheworldaroundthem.Thesediarieswerenotaplaceintowhichtheypouredtheirinnermostthoughtsanddesiresbutratheraplacetochronicle记录thesocialworldaroundthem.Thediariescapturedtheeverydayroutinesofmid﹣19th﹣centurylifeandwomendiaristsinparticularfocusednotonthemselvesbutontheirfamiliesandtheircommunities.Diariestodayareforthemostpartprivate.ButthingsweredifferentfortheseNewEnglanddiaries.Youngwomenwhoweremarriedwouldsendtheirdiarieshometotheirparentsasawayofmaintainingkin血缘relations.Whenfamilyorfriendscametovisititwasnotuncommontositdownandgothroughone'sjournaltogether.Diariesarenottheonlymediathatpeoplehaveusedtodocumentlivesandsharethemwithothers.Wehavelongusedmedialikephotoalbumsbabybooksandevenslideshowsasameansofcreatingtraces痕迹ofourlives.Wedothistounderstandourselvesandtoseetrendsinourbehaviour.Wecreatetracesaspartofouridentityandpartofourmemory.Sharingeverydaylifeeventscanstrengthensocialconnectionandintimacy亲密感.Forexampleyoutakeapictureofyourchild'sfirstbirthday.Itisnotonlyadevelopmentalmilestonethephotoalsostrengthentheidentityofthefamilyunititself.Theactoftakingthephotoandproudlysharingitfurtherreaffirms再次证实oneasagoodandattentiveparent.notherwordsthemediatracesofothersfigureinourownidentities.Today'ssocialmediaplatformsarebyandlargefreetouseunlikehistoricaldiarieswhichpeoplehadtobuy.Todayadvertisingsubsidizes补贴ouruseofnetworkedplatforms.Thereforetheseplatformsencourageuseoftheirnetworkstobuildlargeraudiencesandtobettertargetthem.Ourpicturesourpostsandourlikesarecommodified﹣﹣thatistheyareusedtocreatevaluethroughincreasinglytargetedadvertising.Insteadofsocialmediamerelyconnectingusithasbecomeacraze狂热forinformationcontinuallytryingtodrawusinwiththepromiseofsocialconnectivity﹣﹣it'ssomeone'sbirthdaysomeonelikedyourpictureetc.There'samultibillion﹣dollarindustrypullingusintooursmartphonesrelyingonalongstandinghumanneedforcommunication.Theurgetobepresentonsocialmediaismuchmorecomplexthansimplynarcissism自恋.Socialmedidofallkindsnotonlyenablepeopletoseetheirreflectionsbuttofeeltheirconnectionaswell.
TherearehundredsofscenesinEnglishnovelscharacterswalkthroughalandscapeoffallenleaveswhichmirrorsthefeelingsofthecharacters. A.which B.where C.that D.when
﹣Shallwegototheseveno'clockperformanceortheeight?﹣suitsyoufine.A.Whatever B.Whichever C.Whenever D.Wherever
Ourhomegalaxy星系theMilkyWaymakesforaprettyspacepictureanditlooksnormalatadistance.Butanew3Dmaprevealsasurprise_____.TheMilkyWayisaspiral漩涡型的galaxyinwhichstarsandgascloudsexistmainlyinitsspiral'arms'.OurmassiveneighbortheAndromedagalaxy仙女座isalsospiral.Spiralgalaxiesusuallyappearveryflatandeasytoseethroughatelescopesaidtheresearchers.Using1339largepulsating脉冲的starstomakea3DmapoftheMilkyWayresearchersdiscoveredinsteadthatthegalaxy'sdiskofstarsisincreasinglytwistingmostlikelyduetothespinningofthedisk.Andthefartherthestarsarefromthecenterthemoretwisteditbecomes.Previouslyastronomerssawevidenceofhydrogencloudsbecomingwarped弯曲的intheMilkyWayThisisn'tcompletelyabnormalbecauseastronomershavenoticedthesamepatternofprogressivelytwistingspiralsinaboutadozenothergalaxies.Butitdoeshelpthemmakemoresenseofourgalaxy.Becauseweliveinthisgalaxythatmakesithardertoobserveanddustandstarlightmakeitevenmoredifficultwhenusingtelescopes.Tryingtodeterminewhatourgalacticcenterlookslikeissimilartotryingtofindthecenterofaforestyou'restandingin.'ItisextremelydifficulttodeterminedistancesfromtheSuntopartsoftheMilkyWay'soutergasdiskwithouthavingaclearideaofwhatthatdiskactuallylookslike'leadstudyauthorXiaodianChenoftheChineseAcademyofSciencesinBeijingsaidinastatement.FromafartheMilkyWayappearslikeathinrotating旋转的diskofstarsorbitingthecentereveryfewhundredmillionyears.Inthecenterhundredsofbillionsofstarsanddarkmatterholdthegalaxytogether.Butasyoumovetowardtheoutermostreachesofthegalaxythegravitationalglueofthecenterfades.IntheouterdiskthiskeepshydrogengasfrombeingrestrictedwhichcontributestoanS﹣shapedwarping.'Somewhattooursurprisewefoundthatin3Dourcollectionof1339starsandtheMilkyWay'sgasdiskfolloweachotherclosely.Thisoffersnewinsightsintotheformationofourhomegalaxy'RicharddeGrijsseniorstudyco﹣authorandprofessoratMacquarieUniversity'sDepartmentofPhysicsandAstronomysaidinastatement.'PerhapsmoreimportantlyintheMilkyWay'souterregionswefoundthattheS﹣likestellar星的diskiswarpedinaprogressivelyTwistedspiralpattern.'Sothemassiveinnerdisk'srotationalforcecausestheouterdisktowarptheresearchersconcluded.'Thisresearchprovidesacrucialupdatedmapforstudiesofourgalaxy'sstellarmotionsandtheoriginsoftheMilkyWay'saidLicaiDengco﹣authorandseniorresearcherattheChineseAcademyofSciencesinastatement.1Whichofthefollowingmightbethemissingsentenceinthefirstparagraph?A.TheMilkyWayisbeingwarpedandtwistedbyitsstars.B.TheMilkyWayisspiralandorbitingitselfallthetime.C.Theformationofourhomegalaxyisduetotheforceofgravity.D.TheoriginoftheMilkyWayliesinitsrotationalforce.2Whatdoestheunderlined'this'referto?A.theMilkyWayB.thegravitationalglueC.thefadingofgravityD.theoutermostreachofthegalaxy3Whichofthefollowingistrueaccordingtothepassage?A.Thegalaxyweliveinisuniqueforitsspecialspirals.B.ThestarsinthecenteroftheMilkyWayaremoretwisted.C.Thedistancefromthesuntootherstarsisalreadyknowntoscientists.D.TherotationofitsinnercenterforcestheMilkyWaytotwist.4Whatisthesignificanceofthisfinding?A.ItrevealswhytheMilkyWayisaflatandspiralgalaxy.B.Itleadstoabreakthroughofusing3Dtechnologyinspaceresearch.C.ItprovesapreviouswayofobservingtheMilkyWaywhilewearelivinginit.D.ItcontributestoourknowledgeabouttheMilkyWay.
﹣Whatwouldyouliketodothisweekend? ﹣.It'suptoyou. A.Whatever. B.Definitely. C.Goahead. D.Goodidea.
Thecouplewasinitiallylookingforwardtohavinganoverseasweddingbuthadtodroptheideaafterfacingfromparents. A.recognition B.toleration C.opposition D.proportion
Canetoadsalsoknownasbuffotoadsareyetanotherinvasive入侵speciesthathasfoundahospitablehomeinwarmsouthernFlorida.DeliberatelyintroducedfromSouthandCentralAmericainthe1930stheyweresupposedtocontrolbeetlesdamagingthesugarcanecrop﹣that'showtheygotthename'canetoads'.Canetoadscanposeaparticulardangerbecausetheadultonesshoottoxin毒素fromtheirbackwhenattacked.Thetinytoadsdon'tcarryenoughtoxintobedeadlyyetbutbigadultonescaneasilysendadogintoaseizure疾病发作orevenkillit.Thetoxinis'veryviscousandwouldstickinsidethedog'smouth'saysSteveJohnsonawildlifeecologistattheUniversityofFlorida.Ownersshouldtrytowipeoutanaffecteddog'smouthandimmediatelytakeittothevet.TilfordstartedToadBustersin2017.Thewomanwholivedtherehadninecatswhichshefedbydumpingalmostabagofcatfoodeverynight.Canetoadsnormallyeatbugsbuttheyarehappytoeatpetfoodtoo.CanetoadshaveadaptedbeautifullytotheFloridasuburbssoalotofTilford'sworkalsoinvolvesgettingpeopletorethinktheirsuburbanbackyard.Nomorecatfood.forexample.Petpoop粪便canalsoattractinsectswhichcaninturnattracttoads.AsdolightsAndtoadslovetobreed繁殖inattractivepoolsofwatersuchasthelakeintheaffectedPalmBeachGardenneighborhood.For'theselargercommunitiesthatwanttobuildthesebeautifulpondsandwanttohavehousesonponds'Tilfordsaid'thisisalmostapest﹣controlservice.'Thecanetoadsaren'tgoingawaybuttheycanbemanagedlikemosquitoesorrats.DealingwithtoadsamountstoanannoyingthinginFloridabuttheycanalsocreatemoredramaticproblems.InAustralia﹣wheretheywerealsodeliberatelyintroducedinthe1930stoprotectsugarcane﹣theyareagenuinescourge灾祸.TheissueisthatAustraliahasnonativetoadspeciessononeofthepredators食肉动物knewhowtoavoidthetoxictoads.Asthecanetoadsadvancedeasttowestacrossthecontinent'theyleftawakeofdeadanimalsintheirpaths'saysSeanDoodyanecologistattheUniversityofSouthFloridaatSt.PetersburgwhohasstudiedcanetoadsinAustralia.Turtleslizardsandcrocodilesjuststarteddyingoutwhichwasgoodnewsfortheirprey受害者'Ifyouwereasmallspeciesthatwaspreviouslybeingeatensuddenlyyou'reonahoneymoonsaysRickShineabiologistatMacquarieUniversityinSydneyAustraliawhohasalsostudiedtheimpactofcanetoadsonAustralianwildlife.1Whatcancanetoadsbedescribedas?A.InvasivespeciesintroducedtoSouthAmerica..B.NaturalenemiesofbeetlesdamagingsugarcaneC.Dangerousspeciesmakingactiveattacksondogs.DAgreatthreatpresentedtosomewildlifeecologists.2WhichmightbetheproperwayofavoidingcanetoadsaccordingtoTilford?A.Abandonthesuburbanbackyard.B.Lightupthebackyardatnight.C.Controlthenumberoflargehouses.D.Keeppetfoodawayfrombackyard.3WhathappenedinAustraliaaftercanetoadsbeingintroduced?A.Canetoadsdestroyedsomefoodchains.B.Mostofthepredatorsdiedoftoadtoxin.C.Canetoadsbredatamuchslowerpace.D.Bigspecieslearnedtoavoidcanetoads.
﹣ShouldIaskthebossifhe'supsetatmycominginlateinthemornings? ﹣Ifhehasn'ttsaidanythingaboutitjust. A.letsleepingdogslie B.strikewhiletheironishot C.putyourselfinhershoes D.killtwobirdswithonestone
Thetechindustryexpowhichattractedmorethan180000peoplewasareminderofthetechindustryisbestatbeingoptimisticaboutitself. A.that B.how C.what D.which
﹣LookingbackoninyearsgonebyandthegoodtimethatIhadmakestodayseemrathersad.﹣Absolutely.Somuchhaschanged.A.howitwas B.whoitwas C.howwasit D.whowasit
BeingsoathleticandcourageousHuaMulanwasn'tofmostyoungwomenofher. A.guilty B.cautious C.typical D.skeptical
﹣WhorecommendedNancyforthepost?﹣ItwasJamesadmirationforherwasobvious.A.who B.that C.whose D.whom
Withpeoplepayingattentiontofitnessself﹣servicemini﹣gymseachcoveringabout5squaremetersinChina'smajorcitiestheseyears. A.havesprungup B.sprangup C.hadsprungup D.springup
下列物质中只含有离子键的是
﹣Iwonderwhatchancethereisofmepassingbytheoldplaceswithoutthinkingofyou.﹣.Timecuresallwounds.A.Mypleasure B.Don'tmentionit C.Ican'tagreemore D.Nevermind
Theexplosioninthechemicalplantavoidedhadthecountyauthoritiesaimingtoomuchatshort﹣terminterestsperformedtheirdutiesfromthebeginning.A.shouldbe B.mightbe C.musthavebeen D.couldhavebeen
下列化学用语表示正确的是
Whatthecountrydidtheinternationaltraderegulationsforwhichitwaswidelycondemned.A.approved B.violated C.bothered D.interrupted
下列化学式与指定物质的主要成分对应正确的是
﹣WhichclassicalChinesepoemdoyoulikebest?﹣Don'tlaughifwelaydrunkenonthebattlegroundhowmanysoldiersevercameback.A.oldandyoung B.upanddown C.safeandsound D.rightandwrong
Humanloveisn'tneatlyorderedoreasilypredictable.Butthatdoesn'tmeanthatmathematicshasn'tgotsomethingbecauseloveaswithmostoflifeisfullofpatterns.Mathematicsisbasicallyallaboutthestudyofpatternpatternsfrompredictingtheweathertothefluctuations起伏inthestockmarkettothemovementoftheplanetsorthegrowthofcities.Andifwe'rebeinghonestnoneofthosethingsareexactlyneatlyorderedandeasilypredictableeither.SoletustalkabouthowtopickaperfectpartnerusingahitofmathematicsthatiscalledOptimalStoppingTheory.Imaginethatyoustartdatingwhenyou're15andideallyyou'dliketobemarriedbythetimethatyou're35.Andthere'sanumberofpeoplethatyoucouldpotentiallydateacrossyourlifetimeandthey'llbeatvaryinglevelsofgoodness.Themathsaysthenthatwhatyoushoulddointhefirst37percentofyourdatingwindowyoushouldjustrejecteverybodyasseriousmarriagepotential.Andthenyoushouldpickthenextpersonthatisbetterthaneverybodythatyou'veseenbefore.Ifyoudothisitcanbemathematicallyproveninfactthatthisisthebestpossiblewayofmaximizingyourchancesoffindingtheperfectpartner.ButunfortunatelyIhavetotellyouthatthismethoddoescomewithsomerisks.Forinstanceimagineifyourperfectpartnerappearedduringyourfirst37percent.Nowunfortunatelyyou'dhavetorejectthem.Nowifyou'refollowingthemathsI'mafraidnooneelsewillappearthat'sbetterthananyoneyou'veseenbeforesoyouhavetogoonrejectingeveryoneanddiealone.Okayanotherriskislet'simagineinsteadthatthefirstpeoplethatyoudatedinyourfirst37percentarejustincrediblydullboringterriblepeople.Nowthat'sokaybecauseyou'reinyourrejectionphase.Butthenimaginethenextpersontocomealongisjustslightlylessboringdullandterriblethaneverybodythatyou'veseenbefore.NowifyouarefollowingthemathsI'mafraidyouhavetomarrythemandendupinarelationshipwhichisfranklynotmostsatisfying.Okaysothismethoddoesn'tgiveyoua100percentsuccessratebutthere'snootherpossiblestrategythatcandoanybetter.AndactuallyIalsothinkthatsubconsciouslyhumanswedosortofdothisanyway.Wegiveourselvesalittlebitoftimetoplaythefieldgetafeelforthemarketplaceorwhateverwhenwe'reyoung.Andthenweonlystartlookingseriouslyatpotentialmarriagecandidatesoncewehitourmid﹣to﹣late20s.Ithinkthisisconvincingproofifeveritwereneededthateverybody'sbrainsareprewired天生的tobejustalittlebitmathematical.Thereforeitcanbemathematicallyproventhatthisisthebestwaytofindtheperfectpartner.
2018年联合国把世界水日的主题定为“废水”关注重点是寻找各种方式来减少和再利用废水．下列有关水资源的说法错误的是
热门题库
更多
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
高一下学期数学
教案备课库
高一上学期数学
高一上学期化学
教案备课库
教案备课库
教案备课库
高一上学期物理
教案备课库
教案备课库
湘公网安备 43130202000226号