a＝2，b＝3，c＝5则a，b，c的大小关系为（　　）

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今有①盐酸②醋酸③硫酸三种稀溶液用序号回答下列问题1.若三种酸的物质的量浓度相等A.三种溶液中的大小

.sin1sin2sin3的大小关系为

sin 1sin 2sin 3sin3

设a＝log32b＝ln2c＝5－则abc大小关系为______.

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3 4 7 5

设a＝lg2＋lg5b＝exx

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c＜b＜a c＜a＜b b＜a＜c b＜c＜a 　

若A=1+2x4B=x2+2x3那么A和B的大小关系为______．

如图所示a为地球赤道上的物体b为沿地球表面附近做匀速圆周运动的人造卫星c为地球同步卫星关于abc做匀

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Twothingschangedmylife:mymotherandawhiteplasticbikebasket.Ihavethoughtlongandhardaboutitandit'strue.Iwouldbeadifferentpersonifmymomhadn'tturnedasillybicycleaccessoryintoalifelessonIcarrywithmetoday. Mymotherandfatherwereunitedintheirwayofraisingchildrenbutitmostlyfelltomymothertoactuallycarryitout.LookingbackIhonestlydon'tknowhowshedidit.Managingthefamilybudgetmusthavebeenaveryhardtask.butshemadeitlookeffortless.Ifwecomplainedaboutnothavingwhatanotherkiddidwe'dhearsomethinglikeIdon'tcarewhatso﹣and﹣sogotforhisbirthdayyouarenotgettingaTVinyourroomacarforyourbirthdayalsvishsweet16party.Wehadtoearnourallowance零用钱bydoingchoresaroundthehouse.Icanstillrememberhowlongittooktopolishthelegsofourcoffeetable.Mybrotherscannodoubtrememberhoursspentcleaningthehouse.LikethetwolittlegirlsgrowingupattheWhiteHousewemadeourownbedsnooneleftthehouseunitilthatwasdoneandpickedupafterourselves.Wehadtokeeptrackofourbelongingsandifsomethingwaslostitwasnotreplaced. Itwassummerandonedaymymotherdrovemetothebikeshoptogetatirefixed﹣﹣﹣andthereitwasinthewindowWhiteshinyplasticanddecoratedwithflowersthebasketwinkedatmeandIknew﹣﹣﹣﹣Iknew﹣﹣﹣Ihadtohaveit. It'sbeautifulmymothersaidwhenIpointeditouttoherWhataneatbasket. ItriedtoholdoffatfirstIplayeditcoolforashortwhile.ButthenIguessIcouldn'tatanditanylonger:MonpleasecanIpleasepleasegetit?I‘lldoextrachoresforaslongasyousayI'lldoanythingbutIneedthatbasketIlovethatbasket.PleaseMom.Please? Iwasdesperate. YouknowshesaidgentlyrubbingmybackwhilewebothstaredatwhatIbelieveswasthecoolestthingeverIfyousaveupyoucouldbuythisyourself. BythetimeImakeenoughit'llbugone! MaybeRogerherecouldholditforyoushesmiledatRogerthebikeguy. Hecan'tholditforthatlongMom.Someoneelsewillbuyit.PleaseMomPlease? Theremightbeanotherwayshesaid. Andsoourpayingplanunfolded.MymotherboughtthebeautifulbasketandputitsafelyinsomehidingplaceIcould'tfind.EachweekIeagerlycountedmygrowingsavingincreasedbyextraworkhereandtherewashingthecarhelpingmymothermakedinnerdeliveringorcollevtingthingsonmybikethatalreadylookednakedwithoutthebasketinfront.AndthenweekslaterIcountedre﹣countedandjumpedforjoy.Ohhappyday!Imadeit!Ifinallyhadtheexactamountwe'dagreedupon…. Dayslatertheunthinkablehappened.AneighborhoodgirlI'dplayedwithmillionsoftimesappearedwiththeexactsamebasketfixtedtohershinynewbikethatalreadyhadallthebellsandwhistles.Irodehardandfasthometotellmymotheraboutthisdisaster.Thishorribleturnofevents. Andthencamethelesson.I'vetakenwithmethroughmylife:HoneyYourbasketisextra﹣specialMomsaidgentlywipingawaymyhottears.Yourbasketisspecialbecauseyoupaidforityourself. 55.Whatcanwelearnfromthefirsttwoparagraphs? A.Thechildrenenjoyeddoinghousework. B.Theauthorcamefromswell﹣offfamily C.Themotherraisedherchildreninanunusualway D.ThechildrenwerefondoftheUSpresident'sdaughters. 56.Whentheauthorsawthebasketinthewindowshe. A.fellinlovewithit B.staredathermother C.recognizeditatonce D.wentuptothebikeguy 57.Whydidtheauthorsaymanypleasetohermother? A.Shelongedtodoextrawork. B.Shewaseagertohavethebasket. C.Shefelttiredafterstandingtoolong. D.Shewantedtobepolitetohermother. 58.ByusingnakedParagraph12theauthorseemstostressthatthebasketwas A.somethingshecouldafford B.somethingimportanttoher C.somethingimpossibletoget D.somethingshecoulddowithout 59.Totheauthoritseemedtobeahorribleturnofeventsthat A.somethingspoiledherpayingplan B.thebasketcostmorethanshehadsaved C.aneighborhoodgirlhadboughtanewbike D.someoneelsehadgotabasketofthesamekind 60.Whatisthelifelessontheauthorlearnedfromhermother? A.Savemoneyforarainyday B.Goodadviceisbeyondallprice. C.Earnyourbreadwithyoursweat D.Godhelpsthosewhohelpthemselves.
Inthe1960swhilestudyingthevolcanichistoryofYellowstoneNationalParkBobChristiansenbecamepuzzledaboutsomethingthatoddlyhadnottroubledanyonebefore:hecouldn'tfindthepark'svolcano.IthadbeenknownforalongtimethatYellowstonewasvolcanicinnature﹣that'swhataccountedforallitshotspringsandothersteamyfeatures.ButChristiansencouldn'tfindtheYellowstonevolcanoanywhere. Mostofuswhenwetalkaboutvolcanoesthinkoftheclassiccone圆锥体shapesofaFujiorKilimanjarowhicharecreatedwheneruptingmagma岩浆pilesup.Thesecanformremarkablyquickly.In1943aMexicanfarmerwassurprisedtoseesmokerisingfromasmallpartofhisland.Inoneweekhewastheconfusedownerofaconefivehundredfeethigh.Withintwoyearsithadtoppedoutatalmostfourteenhundredfeetandwasmorethanhalfamileacross.AltogethertherearesometenthousandofthesevolcanoesonEarthallbutafewhundredofthemextinct.Thereishoweverasecondlessknowntypeofvolcanothatdoesn'tinvolvemountainbuilding.Thesearevolcanoessoexplosivethattheyburstopeninasinglebigcrackleavingbehindavastholethecaldera.YellowstoneobviouslywasofthissecondtypebutChristiansencouldn'tfindthecalderaanywhere. JustatthistimeNASAdecidedtotestsomenewhigh﹣altitudecamerasbytakingphotographsofYellowstone.Athoughtfulofficialpassedonsomeofthecopiestotheparkauthoritiesontheassumptionthattheymightmakeaniceblow﹣upforoneofthevisitors'centers.AssoonasChristiansensawthephotosherealizedwhyhehadfailedtospotthecaldera:almostthewholepark﹣22millionacres﹣wascaldera.Theexplosionhadleftaholemorethanfortymilesacross﹣muchtoohugetobeseenfromanywhereatgroundlevel.AtsometimeinthepastYellowstonemusthaveblownupwithaviolencefarbeyondthescaleofanythingknowntohumans. 1WhatpuzzledChristiansenwhenhewasstudyingYellowstone? A.Itscomplicatedgeographicalfeatures. B.Itsever﹣lastinginfluenceontourism. C.Themysterioushistoryofthepark. D.Theexactlocationofthevolcano. 2Whatdoesthesecondparagraphmainlytalkabout? A.Theshapesofvolcanoes. B.Theimpactsofvolcanoes. C.Theactivitiesofvolcanoes. D.Theheightsofvolcanoes. 3Whatdoestheunderlinedwordblow﹣upinthelastparagraphmostprobablymean? A.Hot﹣airballoon. B.Digitalcamera. C.Bigphotograph. D.Bird'sview.
Unliketraditionalgymsapp﹣backedgymsofferpeopleoptionstoexercise. A.casual B.regular C.flexible D.tight
theconvenienceofdigitalpaymentmanyseniorcitizensstartedtousesmartphones. A.Toenjoy B.Enjoying C.Tohaveenjoyed D.Enjoy
Theseating1arrangeisprobablythemostimportantpartofChinesediningetiquette礼仪.Moderndiningetiquetteisenacted进行发生accordingto2principles:themasterofthefeastandguests. Theseatofhonor2reserveforthemasterortheguestwiththehigheststatusistheonefacingeastortheentrance.Thoseofhigherpositionsitclosertothemaster.Theguestsofthelowestpositionsit3farfromtheseatofhonor. Ifroundtables4usetheseatfacingtheentranceisthehonorone.Theseatsonthelefthandsideoftheseatofhonoraresecondfourthsixthetc.inimportance5thoseontherightarethird6fiveseventhandsoonuntilthey7jointogether. Inancienttimestherewasakindoffurnitureknownas8EightImmortalstableabigsquaretablewithbenchesfortwopeopleonboth9side.Iftherewasaseatfacingtheentrancetherighthandseatwasfortheguestofhonor.Ifthemealwasoutsideorthereweretwoormoredoors10equalimportancethentherighthandseatwhenfacingeastwasthehonorseat.
Themusicianalongwithhisbandmemberstenperformancesinthelastthreemonths. A.gives B.hasgiven C.havegiven D.give
DuringthewarmyhusbandwasstationedatanarmycampinadesertinCalifornia.Iwenttolivethereinordertobe1him.Ihatedtheplace.Ihadnever2beensounhappy.Myhusbandwasorderedoutonalong﹣termdutyandIwasleftinatinyshack棚屋alone.Theheatwas3﹣almost1250Fevenintheshadeofacactus仙人掌.4asoultotalkto.Thewindblewnon﹣stopandallthefoodIateandtheevryairIbreathedwere5withsandsandsand! IwassosorryformyselfthatIwrotetomyparents.ItoldthemIwas6andcomingbackhome.IsaidIcouldn'tstanditoneminutelonger.I7beinprison!Myfatheransweredmy8withjusttwolines﹣twolinesthatwillalwayssinginmy9﹣twolinesthatcompletelychangedmylife: TwomenlookedoutfromprisonbarsOnesawthemudtheothersawthestars. Ireadthosetwolines10Iwasashamedofmyself.ImadeupmymindIwouldfindoutwhatwasgoodinmypresent11;Iwouldlookforthestars Imadefriendswiththenativesandtheir12amazedme.Theygavemepresentsoftheirfavoriteartworkswhichtheyhad13toselltotoueists.Istudiedthedelightfulformsofthecactus.Iwatchedforthedesertsunsetsand14forseashellsthathadbeenlefttheremillionsofyearsagowhenthedeserthadbeenanocean15 Whatbroughtaboutthis16changeinme?Thedeserthadn'tchanged17Ihad.Ihadchangedmy18AndbydoingsoIchangedanunhappyexperienceintothemostamazing19ofmylife.IwasexcitedbythisnewworldthatIhaddicoveredIhadlookedoutofmyself﹣creatdedprisonand20thestars 1A.off B.behind C.near D.beyond 2A.before B.already C.then D.still 3A.inflexible B.incomprehensible C.uncontrollable D.unbearable 4A.Only B.Not C.Many D.Such 5A.covered B.filled C.buried D.charged 6A.catchingup B.keepingup C.givingup D.gettingup 7A.oughtto B.mightwell C.wouldrather D.hadbetter 8A.request B.call C.question D.letter 9A.comparison B.imagination C.consideration D.memory 10A.overandover B.byandby C.upanddown D.noeandthen 11A.company B.occupation C.situation D.relationship 12A.movement B.reaction C.guidance D.purpose 13A.refused B.failed C.managed D.happened 14A.asked B.hunted C.waited D.headed 15A.floor B.surface C.rock D.level 16A.shocking B.challenging C.puzzling D.astonishing 17A.as B.but C.for D.or 18A.attitude B.principle C.identity D.standard 19A.vacation B.operation C.affair D.adventure 20A.sought B.counted C.found D.reached

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a＝2，b＝3，c＝5则a，b，c的大小关系为（ ）

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a＝2，b＝3，c＝5则a，b，c的大小关系为（　　）