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一个几何体的三视图如图所示，则该几何体的体积为（ ）
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高三下学期数学《》真题及答案
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.一个几何体的三视图如图所示则该几何体的体积为________.
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2012年高考辽宁文一个几何体的三视图如图所示则该几何体的体积为_______________.
一个几何体的三视图如图所示则几何体的体积为.
一个几何体的三视图如图所示单位m则该几何体的体积为______m3.
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一个几何体的三视图如图所示则这个几何体的体积为____________.
一个几何体的三视图如图所示单位m则该几何体的体积为________m3.
一个几何体的三视图如图所示则该几何体的体积为
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一个几何体的三视图如图所示则该几何体的体积为_____.
一个几何体的三视图如图所示单位m则该几何体的体积为m3
一几何体的三视图如图所示则该几何体的体积为__________.
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NeedaJobThisSummer?Theprovincialgovernmentanditspartnersoffermanyprogramstohelpstudentsfindsummerjobs.Thedeadlinesandwhatyouneedtoapplydependontheprogram.Notastudent?Gotothegovernmentwebsitetolearnaboutprogramsandonlinetoolsavailabletohelppeopleunder30buildskillsfindajoborstartbusinessesallyearround.JobsforYouthIfyouareateenagerlivingincertainpartsoftheprovinceyoucouldbeeligible符合条件forthisprogramWhichprovideseightweeksofpaidemploymentalongwithtraining.Whoiseligible:Youth15﹣18yearsoldinselectcommunities社区.SummerCompanySummerCompanyprovidesstudentswithhands﹣onbusinesstrainingandawardsofupto$3000tostartandruntheirownsummerbusinesses.Whoiseligible:Studentsaged15﹣29returningtoschoolinthefall.StewardshipYouthRangerProgramYoucouldapplytobeaStewardshipYouthRangerandworkonlocalnaturalresourcemanagementprojectsforeightweeksthissummer.Whoiseligible:Studentsaged16or17attimeofhirebutnotturning18beforeDecember31thisyear.SummerEmploymentOpportunities机会ThroughtheSummerEmploymentOpportunitiesprogramstudentsarehiredeachyearinavarietyofsummerpositionsacrosstheProvincialPublicServiceitsrelatedagenciesandcommunitygroups.Whoiseligible:Studentsaged15orolder.Somepositionsrequirestudentstobe15to24orupto29forpersonswithadisability.1WhatisspecialaboutSummerCompany?A.Itrequiresnotrainingbeforeemployment.B.Itprovidesawardsforrunningnewbusinesses.C.Itallowsonetoworkinthenaturalenvironment.D.Itoffersmoresummerjobopportunities.2WhatistheagerangerequiredbyStewardshipYouthRangerProgram?A.15﹣18.B.15﹣24.C.15﹣29.D.16﹣17.3Whichprogramfavorsthedisabled?A.JobsforYouth.B.SummerCompany.C.StewardshipYouthRangerProgram.D.SummerEmploymentOpportunities.
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已知+ax8a＞0的展开式中含x2的系数为2016则定积分ax+exdx的值为
After21yearsofmarriageBillHenrichsandMaryZieglerconcludedthattheywerenolongeragoodmatch.Thecouplepolitelydivorcedin1995andwenttheir1waysbuttheycontinuedtoseeeachotherwhenmeetingtheir2attheirschoolandsportingevents.InFebruary20183sheandHenrichslearnedtheywereamatchinadifferentway. Henrichs'skidneys肾were4andhewasinneedofa5.Afternearly40familymembersandfriendsweretestedaspossible6theresultsurprisedall﹣onlyoneperson7tobeaperfectmatch﹣Ziegler. SoonOct.16.morethanfourdecadesaftertheysaidIdosheandHenrichs62were8intoanoperatingroom.andoneofZiegler'shealthykidneyswas9andgiventoherex﹣husband.Thesurgerywentwellandthetransplantis10wellandcontinuingtoimproveasMr.Henrichs11fromthesurgery.Henrichswasbeyondgratefulforhisex﹣wife'ssympathyand12buthewasalsoworriedinthehoursbeforethe13. Justthreeweeksafterthetransplantshewasbacktoworkanddoingyoga﹣aquickturnaroundconsideringthatthe14kidneydonorneedsahealingperiodofsixtoeight15.Thisentireexperiencehasbroughtusall16.SheandHenrichshopethatbysharingtheirstoryother17willrealizethatdivorceisnotalwaysareasonto18ties. Divorceisdivorce.butthere'snoreasonto19Henrichssaid.Therearelotsofreasonswhyit's20togetalong.Hepausesandlaughs.Somedayyoujustmightneedakidney. 1A.separate B.peaceful C.opposite D.favorite 2A.parents B.colleagues C.kids D.neighbors 3A.moreover B.though C.therefore D.besides 4A.failing B.decreasing C.dying D.fading 5A.doctor B.supporter C.transplant D.receiver 6A.advocates B.donors C.volunteers D.fellows 7A.setout B.triedout C.rushedout D.turnedout 8A.wheeled B.called C.1ed D.dragged 9A.carried B.changed C.selected D.removed 10A.reacting B.functioning C.beating D.1iving 11A.refreshes B.returns C.remains D.recovers 12A.enthusiasm B.generosity C.optimism D.honesty 13A.marriage B.departure C.surgery D.decision 14A.routine B.kind C.uncommon D.average 15A.treatments B.times C.weeks D.operations 16A.closer B.farther C.deeper D.healthier 17A.friends B.schoolmates C.families D.children 18A.cutdown B.putoff C.putdown D.cutoff 19A.disturb B.quarrel C.regret D.cry 20A.important B.optional C.easy D.tough
An'adultingconference'ACthisweekallowedKentuckyhighschoolseniorsthechancetolearnhowtochangeatirehowtocookandotherbasiclifeskills﹣thingsthattheymaynothavelearnedathomeorinclasses.AseriesofphotospostedbyBullittCentralHighSchoolonsocialmediashowsstudentstaking'adultingconference'arelearningaboutpersonalfinancesresumesandotheressentialskillsattheeventwhichhasbeenwidelyreportedonthelocalandnationalnewsoutlets.'IsawaFacebookpostthatparentspassedaroundsayingtheyneededaclassinhighschoolontaxesandcooking'ACorganizerHardintoldLouisville'sWAVE3News.Thoseskillsaretaughtatschooltheoreticallyshesaidbuttheeventgavestudentsachancetofillingapsintheirknowledge.Studentscouldchoosetoattendthreeworkshopsoutof11totaloptionstheschoolsays.Theworkshopswereheldincooperationwithnumerouscommunitypartners.SomeyoungpeoplehavelefthomeandgraduatedschoolwithouthavingthosegapsfilledaccordingtoareportthisweekfromCBSNewYorkwhichdocumentedatrendofyoungpeopleseekingoutclassestolearnbasiclifeskills.Whileattendingacookingclass29﹣year﹣oldElenaToumarastoldthestationshe'sstrugglingwith'simplethings.''Iwassousedtowhenlivingathomemymomalwayscooking'shetoldthestation.An'AdultingSchool'inPortlandMaineaimstouseanewonlineformattoteachtheyouthsskillslikeconflictresolutionsewingandappreciationforallthestationsays.Students'financialliteracyhasbeenofparticularconcerntosomeexpertsasfinancialeducationinschoolshasstagnated停滞intheU.S.withonly17statesrequiringstudentstotakeclassesinpersonalfinance﹣anumberthathasn'triseninyears.'ThemajorityofU.S.statesarefailingourstudentsbydecliningtoofferthesefundamentalcourseswhicharecriticaltotheirfinancialstabilityandsecuritylaterinlife.Andthiswillbechanged.'NanJ.MorrisonpresidentandCEOoftheCouncilforEconomicEducationtoldCNBC.1Whatdoweknowaboutthe'adultingconference'?A.Itdrawsmuchattentionfromthemedia.B.Itisnottaughtathome.C.Itteachesseniorshowtobeareporter.D.Itisbroadcastlivetothepublic.2WhatcanwelearnfromwhatChristyHardinsaid?A.Onlytaxesandcookingclassesaledemanded.B.AChelpsputwhathasbeenlearntintopractice.C.ManyparentspassedbytheACclassroom.D.Theeventwasorganizedby.someparents.3WhydidElenaToumarasattendacookingclass?A.Todocumentatrend.B.Tostrugglewith'simplethings'.C.Tosatisfyhermother.D.Tolearnbasiclifeskills.4Whatcanweinferfromthelasttwoparagraphs?A.Expelswillbeconcernedaboutfinance.B.Fundamentalmajorswon'tbeprovidedinschools.C.Morefinancialcourseswillbeoffered.D.Morestateswilldeclinestudents'courses.
AcrossEuropewherevisitorscanoutnumberresidentsinthesummermonthsthecomplaintshavestarted.LastweekinBarcelonaanopen﹣topbuswasspray﹣paintedacrossitswindscreenwiththewords'TourismKillsNeighbourhoods'.Themessageisclear:suchcitiesareunderpressure.Intouristsandresidents'battleforsharedspaceslocalauthoritiesareuncomfortablyinthemiddle.Thetourismisoneofthelargestemployersintheworldwithonenewjobcreatedforevery30newvisitorstoadestination﹣butatwhatcosttolocals'qualityoflife?Morepeoplearetravellingthaneverbeforeandlowerbarrierstoentryandfallingcostsmeantheyaredoingsoforshorterperiods.Theriseof'citybreaks'﹣48﹣hourburstsofforeigncultures﹣hasincreasedtouristnumbers.'Toomanypeopledothesamethingattheexactsametime'saysXavierFontaprofessorattheUniversityofSurrey'Forlocalsthecitynolongerbelongstothem.'CompoundingtheproblemisAirbnbwhichhasmadetouristsmorecasualintheirapproachtointernationaltravelbutaddedtoresidents'headaches.ThosepermanentcitizenswhosharetheirapartmentblockswithAirbnbhostshavelosttheirpatience'Nolongerdowehavetosharethestreetswithtouristswehavetoshareourownbuildings!'Toeasethecongestionaroundthemainattractionsmanycitiesaretakingimmediateaction.Veniceisproposinganewconceptof'detourism':sustainabletraveltipsandalternativeroutesforexploringadifferentVenice.Agreatervarietyofguidanceforfuturevisitors﹣ideasforwhattodoinoff﹣peakseasonsforexample﹣canguidethemfromovercrowdedlandmarks.Repeatvisitorshaveabettersenseofthecultureanditismucheasiertointegratetheirbehaviourwithresidentsofthecities.'Butthelocalsshouldlearntotaketouristsasapartofurbanlife.Touristsdonothavetobeconsideredpassiveplayersbutratherasvisitorswithrightsandduties'saysFont'Everyonehasaparttoplayinpromotingthatchange.'1Whatproblemdothelocalauthoritiesoftenhaveinatouristcity?A.Thechallengecreatingmorebusinessforlocalpeople.B.Theconflicttakingplaceamongtouristsfromdifferentcountries.C.Thedilemmabetweentourismandlivingqualityofthelocals.D.Thecompetitionsamongthemostpopularattractions.2Whydothelocalresidentsreject'citybreak'accordingtoParagraphTwo?A.Toomanyvisitorshavedamagedthequalityoflife.B.Thelocalsfailtobenefitfromthecitybreakeconomically.C.Thelocalauthoritieslackadequateoperationguidance.D.Theyarereluctanttoshareanythingwithcomingtourists.3WhatisAirbnbmostprobably?A.Anewtravellingmapwithmorestreetinformation.B.AsolutionbyFonttoimprovethelocallivingquality.C.Asmalltownhavingthesamecomplaintsabouttourism.D.Awebsitetohelptravellersfindahomestay.4UndertheconceptofDetourismwhichofthefollowingshouldbeencouraged?A.Developingacitybreakduringon﹣seasons.B.Shiftingvisitorsfrombusyattractions.C.Attractingmorefirst﹣timevisitors.D.Takingtourismasapassivepartofurbanlife.
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Asdataandidentitytheftbecomesmoreandmorecommonthemarketisgrowingforbiometric生物测量technologies﹣likefingerprintscans﹣tokeepothersoutofprivatee﹣spaces.Atpresentthesetechnologiesarestillexpensivethough.ResearchersfromGeorgiaTechsaythattheyhavecomeupwithalow﹣costdevice装置thatgetsaroundthisproblem:asmartkeyboard.Thissmartkeyboardpreciselymeasuresthecadence节奏withwhichonetypesandthepressurefingersapplytoeachkey.Thekeyboardcouldofferastronglayerofsecuritybyanalyzingthingsliketheforceofauser'stypingandthetimebetweenkeypresses.Thesepatternsareuniquetoeachperson.Thusthekeyboardcandeterminepeople'sidentitiesandbyextensionwhethertheyshouldbegivenaccesstothecomputerit'sconnectedto﹣regardlessofwhethersomeonegetsthepasswordright.Italsodoesn'trequireanewtypeoftechnologythatpeoplearen'talreadyfamiliarwith.Everybodyusesakeyboardandeverybodytypesdifferently.Inastudydescribingthetechnologytheresearchershad100volunteerstypetheword'touch'fourtimesusingthesmartkeyboard.Datacollectedfromthedevicecouldbeusedtorecognizedifferentparticipantsbasedonhowtheytypedwithverylowerrorrates.Theresearcherssaythatthekeyboardshouldbeprettystraightforwardtocommercializeandismostlymadeofinexpensiveplastic﹣likeparts.Theteamhopestomakeittomarketinthenearfuture.1Whydotheresearchersdevelopthesmartkeyboard?A.Toreducepressureonkeys.B.Toimproveaccuracyintyping.C.Toreplacethepasswordsystem.D.Tocutthecostofe﹣spaceprotection.2Whatmakestheinventionofthesmartkeyboardpossible?A.Computersaremucheasiertooperate.B.Fingerprintscanningtechniquesdevelopfast.C.Typingpatternsvaryfrompersontoperson.D.Datasecuritymeasuresareguaranteed.3Whatdotheresearchersexpectofthesmartkeyboard?A.It'llbeenvironment﹣friendly.B.It'llreachconsumerssoon.C.It'llbemadeofplastics.D.It'llhelpspeeduptyping.4Whereisthistextmostlikelyfrom?A.Adiary.B.Aguidebook.C.Anovel.D.Amagazine.
ThepolarbearisfoundintheArcticCircleandsomebiglandmassesasfarsouthasNewfoundland.Whiletheyarerarenorthof88°thereisevidence1theyrangeallthewayacrosstheArcticandasfarsouthasJamesBayinCanada.Itisdifficulttofigureoutaglobalpopulationofpolarbearsasmuchoftherangehasbeen2poorstudied;howeverbiologistscalculatethatthereareabout20000﹣25000polarbearsworldwide. Modernmethods3trackingpolarbearpopulationshavebeenemployedonlysincethemid﹣1980sandareexpensive4performconsistentlyoveralargearea.InrecentyearssomeInuitpeopleinNunayut5reportincreasesinbearsightingsaroundhumansettlementsleadingtoa6believethatpopulationsareincreasing.Scientistshaverespondedby7notethathungrybearsmaybecongregating聚集aroundhumansettlementsleadingtotheillusion错觉thatpopulationsare8highthantheyactuallyare.Of9nineteenrecognizedpolarbearsubpopulationsthreearedecliningsix10bestableoneisincreasingandninelackenoughdata.
已知i为虚数单位则复数=
IfAmericanwaterwayshadeverbeenvotedontheyearbooktheBuffaloRivercouldeasilyhavebeennamedUgliest.Itcouldbehardtofindhopethere.Ittookdecadesforpublicperceptionoftherivertoshift.Butactivistcitizenswhocollaboratedwithindustrygovernmentandenviron﹣ment～groups.nevergaveupontheirpollutedriver﹣theBuffaloRivergraduallywentfrombeingconsideredalostcausetoaplaceworthfighringfor.Andbynowthecleaned﹣upwaterisoneofBuffalo'Sbiggestattractions.Bythe1960stheriverwasseenasoneoftheworstsourcesofpollutionpouringintotheGreatLakes.TheBuffaloRiverhadcaughtfiremanytimes.Thesurfacehadanoilylayerandanyfishcaughttherewerenoteatable.Thewaterway'sfatestartedshiftinginthemid﹣1960s.StanleySpisiakwasalocalPolish﹣Americanjewelerbydaybutbyeveninghewasthekindofguywho'dchasedowndumpers垃圾车hespottedontheBuffaloRiver.By1966hefoundhimselfwinningtheNationalWildlifeFederation's'WaterConservationistoftheYear'award.Andbeforelonghegotanickname:'Mr.BuffaloRiver.'Buttherewasonlysomuchhecoulddo﹣theriverwasstilldeclaredbiologicallydeadin1969.JillSpisiakJedlickaishisgreat﹣grandniece.Shepicksupwhereheleftoffbydirectingtheriver'sprotectororganizationBuffaloNiagaraWaterkeeper.ProfessorSchneeklothandsevenfriendsfoundedtheorganizationasanall﹣volunteernonprofitin1989afterorganizingthefirstrivercleanupthatyear.Todaythegroupemploys27full﹣timeworkersandhashelpedoverseetheBuffaloRiver's＄100millionrestoration.SofartheBuffaloRiver'swaterqualityhasrestoredbutitisstillanongoingissueassewage污水canoverflowintotheriverafterstorms.Habitatrestorationcontinuesaswell;fishandplantingsarestillbeingsampledtomeasurehowwellit'sgone.1WhatdidtheBuffaloRiverusetobe?A.Awaterwayontheyearbook.B.Afiverheavilypolluted.C.AgreatattractionofBuffalo's.D.Aplaceworthfightingfor.2WhywasMr.Spisiaknamed'Mr.BuffaloRiver'?A.Becausehisfateshiftedinthe1960s.B.BecausehespotteddumpersontheRiver.C.Becausehesparednoeffortstoprotecttheriver.D.Becausetheriverwasdeclaredbiologicallydead.3Howlongdidittakeforthefivertorestore?A.Morethanhalfacentury.B.Justfourdecades.C.About30years.D.Only27years.4Whatcanbeasuitabletitleforthistext?A.TherestorationoftheBuffaloRiverB.StanleySpisiak:The'Mr.BuffaloRiver'C.ThefutureoftheBuffaloRiverD.Riverprotection:Alongwaytogo
Onourwaytothehouseitwasraining1hardthatwecouldn'thelpwonderinghowlongitwouldtake2getthere.ItwasinthemiddleofPearlCity. Wewerefirstgreetedwiththebarkingbyapack3dogsseventobeexact.Theywerewelltrainedbytheirmasters4hadgreatexperiencewithcaringfortheseanimals.Ourhostssharedmanyoftheirexperiencesand5recommendwonderfulplacestoeatshopandvisit.Forbreakfastwewereabletoeatpapaya木瓜andotherfruitsfromtheirtreesinthebackyard. Whentheywerefreefromworktheyinvitedustolocaleventsandletusknowofaninteresting6competetowatchtogetherwiththestorybehindit.Theyalsosharedwithusmany7traditionstoriesaboutHawaiithatwere8hugepopularwithtourists.Onthelastdayofourweek﹣longstaywe9invitetoattendaprivateconcertonabeautifulfarmontheNorthShoreunderthestars10listentomusiciansandmeetinginterestinglocals.
已知在△ABC中角ABC的对边分别为abc满足=． 1求∠A的大小 2若a=b=2求△ABC的面积．
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处错误每句中最多有两处.错误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. LastJulymyparentsandIwenttovisitmyauntanduncle.Atthedayofourflightwehadtowakeupveryearly.Whenwecheckedourbaginwefoundoneofthembrokenbutfortunatewewereonourwayontime.MyfavoriteexperiencewasourvisittoMountRainierwhichwasnothinglikeIhaveexpected. WhenweleftmyauntlentussunhatsbutIthoughtitwouldbeveryhot.ImaginehersurprisewhenIfoundthemountaintopcoveringwithsnow.Wewalkedalongasmallpathbeyondthemaintrailsincreaseourchancesofseeingwildlife.Smallwildflowersgrewupthroughthesnowunderneaththatwecouldhearasmallstream.Littleanimalsstoodstilltoavoidfrombeingnoticed.ItwasthemostbeautifulsightthatIhadeverseen.
在直角坐标系xOy中直线l的参数方程为t为参数以坐标原点为极点x轴的正半轴为极轴建立极坐标系圆C的极坐标方程为． 1若l与C相交于AB两点P﹣20求|PA|•|PB| 2圆M的圆心在极轴上且圆M经过极点若l被圆M截得的弦长为1求圆M的半径．
Morethan40percentofthespeciesthathelpwithpollination植物传粉areunderthreatduetothepollutedenvironment.Sosomeresearchershavebeensearchingforwaystoprotectthebeesandothercrucialpollinatorswhilesomeengineershavethoughtperhapsanarmyofroboticpollinatorscouldkeephumanswell﹣suppliedinthesefoods.Ateamofresearchershasrecentlydesignedasmalldronecapableofpollinatingflowers.Theytestedtheirdeviceonthelargepinkflowersoflilies.Anditworked.Excitingasthissuccesswasitisonlythefirststep.Theteamhasyettofigureouthowtoapplytheconceptonthemassivescale.Couldafleetofrobo﹣pollinatorsreplacethebees?'Althoughtheanswerisn'tastraightforwardnoitwouldbeachallengingleaptogofromthisonelittledronepollinatingonelargeflowertoanarmyofdronesspreadingacrossfieldsofcrops'saysScottSwintonanagriculturaleconomistatMichiganStateUniversity.'Thesuccessfulpollinationwasfascinating'ScottSwintonsays'butthedeviceitselfmightdamagetheflowers.Iwonderhowyoumakesureyou'renotdoingmoreharmthangoodtoflowerswhenyouhaveadrone.''Furthermore'hepointsout'alilyisaparticularlyeasyflowerforadronetopollinate.Tomakethismorebroadlyapplicableforsmallerandmorecomplexflowerstructuresthedroneswouldneedtobeparticularlyagile.'StillJoshuaCampbellanexpertattheUniversityofFloridasays'Pollinationsystemsareextremelycomplexandwillalwaysrequireinsects.Thereisnosubstituteforbees.''Asforthetechnologyitselfitisapromisingnewdevelopmentinexistingdronetechnology'headded.Yethestillseessomehurdlesaheadbeforedronescanbeappliedonalargescale.1Whatmakesthosescientistsinventpollinatingdrones?A.Therearenosatisfyingpollinators.B.Humansneedmorefoodsupplies.C.Pollinatingspeciesarebeingendangered.D.Dronetechnologyiswell﹣developednow.2WhatproblemdoesScottthinkscientistshavetosolvefortherobo﹣pollinators?A.Makingthemlooklikebees.B.Usingtheminquantity.C.Keepingthemflyingnon﹣stop.D.Instructingthemtotellplants.3Theunderlinedword'agile'inPara6canbereplacedby''.A.cheapB.catchyC.lovelyD.smart4What'sthebesttitleforthepassage?A.Willpollinatingdronestakeoverforhoneybees?B.Whatisleadingpollinatinghoneybeestodecline?C.Whydoespollinatingneedamoney﹣savingoption?D.Howdidresearchersinventpollinatingdrones?
Inanonlineclassdevelopinghealthypatternsofcommunicationwithprofessorsisveryimportant.1WhileIhaveonlylistedtwoofeachthereareobviouslymanyothersituationsthatcanarise.Studentsshouldbeabletoextendthelogic逻辑ofeachtotheirparticularcircumstance. Do's •2Questionsaboutsubjectcontentaregenerallywelcomed.Beforeaskingquestionsaboutthecoursedesignreadthesyllabus教学大纲andlearningmanagementsysteminformationtobesuretheanswerisn'thidinginplainsight. •Participateindiscussionforums论坛blogsandotheropen﹣endedforumsfordialogue.3Besuretostayontopicandnotofferirrelevantinformation.Makeapointandmakeitsafeforotherstodothesame. Don'ts •Don'tsharepersonalinformationorstories.Professorsarenottrainednursesfinancialaidexpertsoryourbestfriends.Ifyouareinneedofadeadlineextensionsimplyexplainthesituationtotheprofessor.4 •Don'topenlyexpressannoyanceataprofessororclass.5Whenastudentattacksaprofessoronthesocialmediathelanguageusedactuallysaysmoreaboutthestudent.Ifthereistrulyaconcernaboutaprofessor'sprofessionalismorabilitybesuretouseonlinecourseevaluationstocalmlyofferyourcomments. A.That'swhattheyarefor. B.Turntoanonlineinstructorforhelp. C.Ifmoreinformationisneededtheywillask. D.Rememberthatonlineprofessorsgetalotofemails. E.Belowaresomecommondo'sanddon'tsforonlinelearners. F.Everyonehastakenanot﹣so﹣greatclassatonetimeoranother. G.Askquestionsbutmakesuretheyaregoodthoughtfulquestions.
IsFreshAirReallyGoodforYou? Weallgrewuphearingpeopletellustogooutandgetsomefreshair.1AccordingtorecentstudiestheanswerisabigYESiftheairqualityinyourcampingareaisgood. 2Iftheairyou'rebreathingisclean﹣whichitwouldbeifyou'reawayfromthesmogofcities﹣thentheairisfilledwithlife﹣givingenergizingoxygen.Ifyouexerciseoutofdoorsyourbodywilllearntobreathemoredeeplyallowingevenmoreoxygentogettoyourmuscles肌肉andyourbrain. Recentlypeoplehavebegunstudyingtheconnectionbetweenthenaturalworldandhealing治愈.3Intheseplacespatientscangotobenearnatureduringtheirrecovery.Itturnsoutthatjustlookingatgreengrowingthingscanreducestresslowerbloodpressureandputpeopleintoabettermood情绪.Greeneryisgoodforus.HospitalpatientsWhoseetreebranchesouttheirwindowarelikelytorecoveratafasterratethanpatientswhoseebuildingsorskyinstead.4Itgivesusagreatfeelingofpeace. 5Whilethesun'srayscanageandharmourskintheyalsogiveisbeneficialVitaminD.TomakesureyougetenoughVitaminD﹣butstillprotectyourskin﹣putonsunscreenrightasyouheadoutside.Ittakessunscreenaboutfifteenminutestostartworkingandthat'splentyoftimeforyourskintoabsorbaday'sworthofVitaminD. A.Freshaircleansourlungs. B.Sowhatareyouwaitingfor? C.Beinginnaturerefreshesus. D.Anothersidebenefitofgettingfreshairissunlight. E.Butisfreshairreallyasgoodforyouasyourmotheralwayssaid? F.Justasimportantlywetendtoassociateairwithhealthcare. G.AllacrossthecountryrecoverycentershavebegunbuildingHealingGardens.
2019年两会已经胜利召开由于互联网技术发展迅速给我们国家生产力水平及百姓日常生活都带来了巨大的变化__表中互联网大咖互联网公司的最高领导者明显增多．透过他们在两会中的议案提案和建议发现提及最多的是电商互联网人工智能专利漏洞精品采购科技服务业等行业的创新与发展．为了深入研究这些提案的背景及可操作性有关方面拟组建3个不同研究方向的深度研究小组在参加两会的互联网大咖中选定张近东马化腾李彦宏雷军4位大咖作为深度研究小组特邀专家分配到各小组要求每个小组至少有一名特邀专家则不同的分配方案有
OPENINGSANDPREVIEWSAnimalsOutofPaperYolo!ProductionsandtheGreatGriffonpresenttheplaybyRajivJosephinwhichanorigami折纸术artistinvitesateenagetalentandhisteacherintoherstudio.MerriMilwedirects.Inpreviews.OpensFeb.12.WestParkPresbyterianChurch165W.86thSt.212﹣868﹣4444.TheAudienceHelenMirrenstarsintheplaybyPeterMorganaboutQueenElizabethIIoftheUKandherprivatemeetingswithtwelvePrimeMinistersinthecourseofsixtyyears.StephenDaldrydirects.AlsostarringDylanBakerandJudithIvey.PreviewsbeginFeb.14.Schoenfeld236W.45thSt.212﹣239﹣6200.HamiltonLin﹣ManuelMirandawrotethismusicalaboutAlexanderHamiltoninwhichthebirthofAmericaispresentedasanimmigrantstory.ThomasKaildirects.Inpreviews.OpensFeb.17.Public425LafayetteSt.212﹣967﹣7555.OntheTwentiethCenturyKristinChenowethandPeterGallagherstarinthemusicalcomedybyBettyComdenandAdolphGreenaboutaBroadwayproducerwhotriestowinamoviestar'sloveduringacross﹣countrytrainjourney.ScottEllisdirectsforRoundaboutTheatreCompany.PreviewsbeginFeb.12.AmericanAirlinesTheatre227W.42ndSt.212﹣719﹣1300.1WhatistheplaybyRajivJosephprobablyabout?A.Atypeofart.B.Ateenager'sstudio.C.Agreatteacher.D.Agroupofanimals.2WhoisthedirectorofTheAudience?A.HelenMirren.B.PeterMorgan.C.DylanBaker.D.StephenDaldry.3WhichplaywillyougotoifyouareinterestedinAmericanhistory?A.AnimalsOutofPaper.B.TheAudience.C.Hamilton.D.OntheTwentiethCentury.
已知F1F2是双曲C=1a＞0b＞0的左右焦点B是虚轴的端点直线F1B与C的两条渐近线分别交于点PQ线段PQ的垂直平分线与x轴交于点M2c0则C的离心率是
党的十八大以来__从全面建成小康社会全局出发把扶贫工作摆在治国理政的突出位置全面打响脱贫攻坚战2018年6月中__国务院关于打赢脱贫攻坚战三年行动的指导意见发布对精准脱贫这一攻坚战做出了新的部署2019年3月十三届全国人大二次会议召开3月7日国务院扶贫办刘永富回答记者问时表示“我国脱贫攻坚取得显著成就贫困人口从2012年的9899万人减少到2018年的1660万人连续6年平均每年减贫1300多万人．并表示“今年再努力一年攻坚克难再减少贫困人口1000万人以上再摘帽300个县左右．” 根据某市所在地区的收入水平消费水平等情况拟将家庭年收入低于1.2万元的家庭确定为“贫困户”该市扶贫办为了打好精准脱贫攻坚战在所辖某县的100万户家庭中随机抽取200户家庭对其2018年的全年收入进行调查抽查结果如下频率分布直方图 1求这200户家庭的全年收人的样本平均值和方差s2同一组中的数据用该组区间的中点值作代表 2由直方图可以认为这200户家庭收入Z近似服从正态分布Nμσ2其中μ近似为样本平均数σ2近似为样本方差s2． i利用该正态分布求PZ＜1.2 ii若从该县100万户中随机抽取100户记X为这100户家庭中“贫困户的数量利用i的结果求EX 附若Z～Nμσ2则Pμ﹣σ＜Z＜μ+σ=0.683Pμ﹣2σ＜Z＜μ+2σ=0.954．
Beforethe1830smostnewspapersweresoldthroughannualsubscriptionsinAmericausually﹩8to﹩10ayear.Today﹩8or﹩10seemsasmallamountofmoneybutatthattimetheseamountswereforbiddingtomostcitizens.Accordinglynewspaperswerereadalmostonlybyrichpeopleinpoliticsorthetrades.Inadditionmostnewspapershadlittleinthemthatwouldappealtoamassaudience.Theyweredullandvisuallyforbidding.Buttherevolutionthatwastakingplaceinthe1830swouldchangeallthat.Thetrendthenwastowardthe'pennypaper'﹣atermreferringtopapersmadewidelyavailabletothepublic.Itmeantanyinexpensivenewspaper;perhapsmoreimportantlyitmeantnewspapersthatcouldbeboughtinsinglecopiesonthestreet.Thisdevelopmentdidnottakeplaceovernight.Ithadbeenpossiblebutnoteasytobuysinglecopiesofnewspapersbefore1830butthisusuallymeantthereaderhadtogodowntotheprinter'sofficetopurchaseacopy.Streetsaleswerealmostunknown.Howeverwithinafewyearsstreetsalesofnewspaperswouldbecommonplaceineasterncities.Atfirstthepriceofsinglecopieswasseldomapenny﹣usuallytwoorthreecentswascharged﹣andsomeoftheolderwell﹣knownpaperschargedfiveorsixcents.Butthephrase'pennypaper'caughtthepublic'sfancyandsoontherewouldbepapersthatdidindeedsellforonlyapenny.Thisnewtrendofnewspapersfor'themanonthestreet'didnotbeginwell.Someoftheearlyventures企业wereimmediatefailures.Publishersalreadyinbusinesspeoplewhowereownersofsuccessfulpapershadlittledesiretochangethetradition.Ittookafewyouthfulanddaringbusinessmentogettheballrolling.1WhichofthefollowingbestdescribesnewspapersinAmericabeforethe1830s?A.Academic.B.Unattractive.C.Inexpensive.D.Confidential.2Whatdidstreetsalesmeantonewspapers?A.Theywouldbepricedhigher.B.Theywoulddisappearfromcities.C.Theycouldhavemorereaders.D.Theycouldregainpublictrust.3Whowerethenewspapersofthenewtrendtargetedat?A.Localpoliticians.B.Commonpeople.C.Youngpublishers.D.Richbusinessmen.4Whatcanwesayaboutthebirthofthepennypaper?A.Itwasadifficultprocess.B.Itwasatemporarysuccess.C.Itwasarobberyofthepoor.D.Itwasadisasterforprinters.
假定你是李华你校将举办音乐节.请写封邮件邀请你的英国朋友Allen参加内容包括: 1.时间; 2.活动安排; 3.欢迎他表演节目. 注意: 1.词数100左右; 2.可以适当增加细节以使行文连贯.
Itwasthebiggestnightofmylife一openingnight.Hoursof1anddailyrehearsalshadgoneintothisproduction.Ihadrecitedmylineathousandtimes2thatmyonesentencewouldbethehighlightoftheshow. Asa7﹣year﹣oldboyIwas3toperforminanactualmusical.ThenightbeforeIhad4mycostumeonthebed:awhiteshirtbluejeans?andmyhandmadenecklace. My5wasgoingtobespeciallydone.Mylipswouldbeinbeautifulred.Iwas6preparedtobetheshiningstarinmyclass'sperformanceofthemusicalOneBigHappyFamily. Alittletimebeforetheplaythebackstagewascomplete7.MyfriendandIdressedinourcostumesweregiggling.Childrenwererunningaroundmadly.Somewere8aboutforgettinglines;othersweresingingvarioussongsoutoftune.Itwasabiggroupof9secondgradersabouttomaketheirfirstperformance. Soonthebigmomentcameandweallfiledontothestage10theaudienceofparentsandrelatives.The11beganandmysecondgradeclassstartedsingingwithsweetseven﹣year﹣oldvoices.Isangmylittleheart12hopingtomaketheshowasperfectasI'd13. Myturntospeak!Thekidstandingnexttomehandedoverthemicrophonetome.AsIstartedtospeakInoticedsomethinghadgonehorribly14一themicrophonewasnotturnedon.Thebloodrushedtomyfaceimmediately.15Iturneditoverandswitchedthedeviceon.AftersayingmylineasquicklyaspossibleIhandedthemicrophoneoffandIjustfeltthatIhad16. Everybodyisexcellent!''theteacher17usinthebackstage.I'msorryMissAlex.Isaidtoher.18tobesorryaboutHoney.ShesmiledtomeNoteverysurpriseinourlifeisalwayssopleasant.Youdidagoodjob! Ifeltso19inaminuteandIcanhardlywaittotellmydadandmumthestoryoftheunpleasant20. 1A.experiments B.preparations C.descriptions D.introductions 2A.informed B.confirmed C.amazed D.convinced 3A.eager B.grateful C.scared D.accustomed 4A.laidout B.hungup C.turnedout D.madeup 5A.head B.heart C.hair D.feet 6A.deliberately B.thoroughly C.possibly D.nervously 7A.party B.silence C.tension D.chaos 8A.panicking B.arguing C.greeting D.thinking 9A.relaxed B.timid C.excited D.confused 10A.leaving B.facing C.playing D.greeting 11A.show B.line C.rehearsal D.practice 12A.in B.down C.of D.out 13A.found B.imagined C.declared D.calculated 14A.blank B.wrong C.numb D.mad 15A.Impatient B.Enthusiastic C.Embarrassed D.Determined 16A.pickedup B.mixedup C.cheeredup D.messedup 17A.admired B.criticized C.praised D.taught 18A.Everything B.Something C.Nothing D.Anything 19A.proud B.relieved C.puzzled D.interested 20A.surprise B.lesson C.program D.performance
如图在多面体ABCDEF中四边形ADEF为正方形AD∥BCAD⊥ABAD＝2BC＝1． 1证明平面ADEF⊥平面ABF． 2若AF⊥平面ABCD二面角A﹣BC﹣E为30°三棱锥A﹣BDF的外接球的球心为O求二面角A﹣CD﹣O的余弦值．
设a=b=2c=log32则
定义在R上的偶函数fx对任意的实数x有fx+1=﹣fx当x∈[﹣10时fx=﹣x2．若函数gx=fx﹣logax在x∈0+∞上有且仅有三个零点则a的取值范围为．
若实数xy满足则z=x﹣2y的最大值为．
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.错误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. Laughingisoneoflife'smostsimplepleasure.Itisfree.Youcandoitanywhere.Liketheflulaughtercanspreadeasyamongpeople.Oftenwhenwehearsomeonelaughingincrowdedroomorapackedtrainwestartlaughingtoo﹣evenifwehavenoideahow. Infactmentalhealthcanaffectonphysicalhealth.ThereforeLaughteristhebestmedicinedoesnotmeanthatIshouldnottakemedicinewhenyou'resick.Itsimplymeansthathaveapositiveoutlookmighthelpeaseyourtroublesbutmakeyoucheerful.Besidesmakingotherslaughwithyouisalsoanactwhatisjoyfulandkind.
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