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A、B、C三种固体物质的溶解度曲线如图所示，据图回答下列问题： （1）在 ℃时，A和C的溶解度相等． （2）溶解度随温度升高而降低的是 ．（填字母序号，下同） （3）最适合采用冷却热饱...
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甲乙丙三种固体物质的溶解度曲线如图所示请回答下列问题1a3℃时三种物质的溶解度由大到小的顺序是___
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HighlightsofIceland Day1 OurrepresentativewillmeetyouattheairportandabuswillbringyoutoyourhotelinthecapitalReykjavik.Aftercheckinginyourguidewillleadyoutovisitsomeofthecity'shighlights. Day2 WetourIceland^GoldenCircletakinginThingvellirNationalParkandgullfossWaterfallandseeTrokkurwhichspouts喷射a100﹣footjetofwaterintotheairevery3﹣5minutes. Day3 Day3isleftfreesothatyoucantryoutouroptionaltours.ExploretheThorsmorkValleyonajeepride.Anotheroptionistodriveoutontotheglaciers冰川andtakeasnowmobiletour.Whale﹣watchingboattripsarealsoavailablefromReykjavikharbour. Day4 Thetourendsatthecityairport. UsefulInformation •ThelocalcurrencyistheIcelandicKronaISK.Theoptionaltoursonday3costextraandaminimumof4peopleisrequiredforboththejeepandsnowmobilingtours. CurrentcostsThorsmorkJeeptour27000ISKsnowmobiletour34200ISKwhale﹣watchingsummeronly9000ISK. •Tippingisvoluntarybutisexpectedinthispartoftheworldforworkersinthetourismindustry. •Youmusthavetravelinsurancetotravelonourtours.Youcanarrangeforthisyourselforbuyitthroughourcompany. •Youcaneitherbookaflightwithusorarrangeyourownflight.Ifyouchoosethelatteryouwillhavetomakeyourownwaytothehoteldetailsofwhichwillbesenttoyouinadvance. 1OnwhichdaycanthetouristsseeGullfossWaterfall? A.Day1. B.Day2. C.Day3. D.Day4. 2Whatcanbelearnedaboutthewhale﹣watchingtour? A.Itisoneoftheoptionaltours. B.Itisavailableallyearround. C.Itcostsmorethanthesnowmobiletour. D.Itrequiresatleastfourpeopleforeachtour. 3Whatisrequiredofthetourists? A.Tippingtheirguides. B.Bookingaflightwiththetourcompany. C.Reachingtheirhotelinadvance. D.Buyingtravelinsurance.
吃饺子是中国北方人过春节重要的传统习俗之一饺子用到的食材中富含蛋白质的是
ATennesseewomancelebratedherbirthdaywithabittersweetgiftfrombeyondthegrave﹣﹣flowersfromherfatherwhodiedfiveyearsago. MichaelWilliamSellerspre﹣paidforabouquetof1tobedeliveredtohisdaughterBaileyevery2untilsheturned21.AndonFridayBailey3thegiftherlastfromherdad. Mydad4whenIwas16fromcancerandbeforehediedhepre﹣paidflowerssoIcouldreceivethemeveryyearonmybirthdaytheshe.Thisismy21stbirthdayflowersandthe5. Baileysaidthespecialgiftmadebirthdays6.SincethatdayI'vehatedmybirthday7healwaysmadeitsospecialBaileysaidIwasespecially8my21stbecauseIknewitwouldbethelastyear. Baileysaidthisyear'sgiftandbirthdaycardwereespecially9.Ibrokedownshesaid.Thatletterwasvery10andsadallatthesametime. Thisismylastlovelettertoherfather11.Idonotwantyoutodropanother12formeforIamina13place.Healsotoldhertoalwaysrespecthermotherandstay14toherself.Behappyandlivelifetothefullesthewrote.Iwillbewithforeverjust15andIwillbe. Thatwasmydadshesaid.Hewastryingtomakemybirthday16. Socialmediausers17thepostcallingitbothheartwarmingandheartbreaking. Otherspraisedherfathercallinghimaan18ofwhatagoodmanislike Hewouldbevery19Baileysaidhe'dbeveryproudthatit20alotofpeople. 1A.flowers B.cakes C.presents D.grapes 2A.wedding B.birthday C.funeral D.exam 3A.sold B.cheated C.received D.threw 4A.passeddown B.passedout C.passedby D.passedaway 5A.first B.last C.best D.most 6A.tough B.happy C.natural D.honest 7A.because B.but C.so D.if 8A.liking B.expecting C.hating D.preparing 9A.expensive B.careful C.beautiful D.meaningful 10A.difficult B.sweet C.fortunate D.selfish 11A.smiled B.forgot C.wrote D.sighed 12A.coin B.hair C.tear D.leaf 13A.better B.hotter C.colder D.worse 14A.hard B.wealthy C.foolish D.true 15A.walkaround B.putforward C.lookaround D.giveup 16A.tiring B.amazing C.boring D.embarrassing 17A.respondedto B.ledto C.contributedto D.cameto 18A.joke B.story C.prize D.example 19Avivid B.proud C.nervous D.ashamed 20A.knocked B.fired C.informed D.touched
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Forhealthyadultsexpertssaythateatingalotoffruitisunlikelytogetyouintotroubleaslongasit'spartof1normaldiet. Themainconcernwithovereatingfruitis2itnaturalsugaryetresearchhasalwayslinkedwhole﹣fruiteatingtoa3reduceriskforobesityandotherdiseases.That'sbecausewholefruithasafewbuilt﹣in4advaniagethatseemtoreduceanysugar﹣drivenhealthrisks.Itcontainstwokindsoffiberwhichformabarrierontheinsideofthesmallintestine肠.Thisbarrierlimitstherateofsugarabsorbingsothattheliver肝isnotharmedjustlikestoppingalargewave5buildinganunderwaterwall.Fruitfiberalso6helpfoodreachthefinalpartofyoursmallintestinesoonersoyoutendtofeelfull7quickaftereatingfruit.Asaresultthechancesyouwillovereatfruitarerelativelylow. Somefruitsmaybebetter8eatthanothers.Forexampleberrieshavebeenlinkedtobothbetterheartandbetterbrainhealth.9grapesmayneedmoreself﹣control.They'remainlylittlebagsofsugar. Ifyoulovewholefruitthere'slittleevidencetoshow10eatingit一evenawholelotofit﹣isbadforyourhealth.
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ThePalaceMuseumiscelebratingitsupcoming600thanniversary.Itsnewattempt1fillyoungergenerationswithcultureisafabulousmixofcelebritiesancienthistoryandmoderntechnology.ThePalaceMuseumishometo2rough1.86millionprecioushistoricalrelics遗迹andamong3theNorthSongDynastymasterpieceAlongtheRiverduringtheQingmingFestivalpaintedbyZhangZeduan4considertobeofgreatvalue.ThepaintinghassuchareputationofbeingChina'sMonaLisa5millionsofvisitorsareattractedtoenjoyit.The6originmasterpieceisstatic静态的anditseemsthatthegeneralpublicrarelyknows7thepaintingisattemptingtoconvey.Since2000thePalaceMuseum8cooperatewithtechnologycompaniestomakethesesilenthistoricalrelicscomealive.Thedigitalizedversionoftheworkcanbeshownonthegiantscreeninanexhibitionroom.Visitors9wearVRglasseswilltakeaboatandexploretheneighborhoodoftheBianRiver.Thankstomoderntechnologyalltheprecioushistoricalrelicswillbebrought10lifewiththeirobscure晦涩的wordseasiertounderstand.
下列变化中不属于化学变化的是
Helpfultipsforcollege﹣boundseniors Researchingacollegeisoneofthemosttime﹣consumingtasksthatyou'llencounter.1Forexamplewhatclassesandfacilitiesthecollegehastoofferandwhatsportsitoffers.Afternarrowingyourchoicestoagroupofcollegesyou'llhavetostarttoresearchtheseindepth.2Heorshemaybeabletohelpyoufindthingsaboutthecollegesthatyoucouldnotgetyourself. Knowingwhatyouwanttostudyisanotherkeytolookingforacollege.3ByknowingwhatIwanttodoIcanthenlookatcollegesthatI'vebeenthinkingaboutapplyingtoandnarrowmychoicesdown.Ifacollegedoesn'thavethecoursesIneedthenit'sdefinitelyoutofthepicture. Anotherkeythingtolookforisthecollege'stestingrequirements.4SomecollegesalsorequireanSATIItestincertainareasforexampleEnglishorMath.Remembertolookatacollege'sGPArequirementstoo.Youmayfindacollegewherethere'severythingyouwantbutyourGPAisn'thighenoughtobeconsidered.Inthiscaseyoumayneedtoattendajuniorcollegeforoneortwoyears. 5Atthispointyoumaywanttohavealongdiscussionwithyourparentsandfindouthowmuchthey'rewillingandabletospendoncollege.Ifitisn'tenoughtocoveryourfulltuitionthenyoumaywanttoapplyforfinancialaidorascholarship.Andyourfinaloptionmaybelookingforacollegethatdoesn'tcostasmuch. A.AllcollegesrequireanSAToranACTtest. B.Andlastlybutdefinitelynottheleastistuition. C.Lookforacollegenowifyouplanonattendingone. D.Youneedtofindoutmanybasicsaboutpossiblecolleges. E.Ifyouwillbeaseniorinthenearfuturethisarticleisforyou. F.Iplantomajorinbusinessmanagementandminorincomputerapplications. G.Ifyouhaveacollegecounseloratyourschoolthiswouldbeagoodtimetoaskforadvice.
假定你是校学生会__李华上周你校组织一个文化交流团到英国某高中进行文化交流现已回国.请你代表你校交流团给英国活动负责人David写一封信内容包括1.感谢对方的招待2.此行的体验和收获3.邀请对方暑假来中国体验中国文化.注意1.字数100左右开头结尾已为你写好不计入总词数2.可以适当增加细节以使行文连贯.DearDavidWehavebeenbackhomesafelyfromEngland.YoursLiHua
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ItwasdaysorevenweekssinceIhadbeenleftontheisland.MyonlycompanionwasadogcalledPhillywhichhadsurvivedtheshipwreck.Memoriesofwhathappenedwerestillfresh. Themagnificenceoftheshiphadgivenusallafalsesenseofsecurity.Asthefirstsignsofthestormstartedourcaptainannouncedit'snothingmuchjustanotherstorm.Yethewaswrong!Thestormhittheshipsobadlythatlargeholesweremadeatthesidesoftheship.Asthefreezingwaterstartedrushinginourshipwasconsumedquicklybythedarkwater. MytrainofthoughtwasdisturbedbyPhillylickingmyhanddearly.Areyouhungry?Ispokemyfirstwordseversincetheshipwreckoccurred.Woofwoof!BarkedPhillyenthusiastically.Atthismomentmystomachgavealoudgrowltoo.Icouldnotrememberwhenmylastmealwasprobablyaten﹣coursedinnerontheship.AsIhadneverfishedbeforeIthoughtmaybeIcouldtrysomethingsimplerlikepickingfruits.WithPhillyatmysidearmedwithasharpbranchwewalkedintotheforestontheislandtogether.SuddenlyIthoughtIheardnoises.Couldtherebeanyoneelseonthisisland?Iwondered.Aswewerelookingforfruittreeswechancedupononethatboreyellowjuicy﹣lookingfruit.Phillystartedbarking﹣wehadcompany.Itwasadark﹣skinnedwomanholdingasharpspeardressedinfurandgrass.Ibackedawayfromherafraidthatshewouldbeaggressive.ThenIsawthatshewastryingtosaveus.Pointingherspearatthefruittreesheshookherheadstrongly. InoddedathertoshowIunderstoodwhatshewassaying.SignalingtoustofollowhersheturnedtowalkalongasmallpaththatIhadnevernoticed.Attheendofthesmallpaththerewasasmallvillage.Tearsofjoyfilledmyeyes. 1Whathappenedtotheshipthewriterhadbeenon? A.Itwasfrozeninthesea. B.Itwasturnedoverbythestorm. C.Itwasdesertedbecauseitwasinsecure. D.Itsankduetothedamagecausedbythestorm. 2AccordingtothepassagewhichofthefollowingcanbestdescribePhilly? A.Activeandfriendly. B.Caringbutaggressive. C.Smartandfaithful. D.Noisybutenthusiastic. 3Whydidthewriterwalkintotheforest? A.Totakeshelterfromthestorm. B.Togotoasmallvillage. C.Tofindsomeoneforhelp. D.Tolookforsomethingtoeat. 4Thewomanmostprobablytriedtotellthewriterthat. A.thefruittreewasn'tthebestchoice B.thefruitwasunfitforeating C.thewriterwasn'tallowedtopickthefruit D.shewasn'tafraidofthewriter
区分下列各组物质的两种方法都合理的是
假定英语课上英语老师要求同桌之间互相修改作文请你修改你同桌的以下作文. 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. 删除把多余的词用斜线\划掉. 增加在缺词处加一个漏字符号∧并在该词下面写出该加的词. 修改在错的词下划一横线在该词下面写出修改后的词. 注意1每处错误及修改均仅限一词. 2只允许修改10处多者从11处起不计分. Dearfriends ItisagreathonortosharewithyoumyexperienceinmakingEnglishspeeches. TotellatruthmyspokenEnglishusedtobeabigheadacheforme.DuetomyterriblepronunciationIoftengotmisunderstoodorevenlaughedbyothers.Ineversucceedinspeechcompetitions.ThereforeIrefusedtogiveup.EverydayIspenttwohourslistentoEnglishprogramstoimprovemyoralskills.Tomyjoymyeffortwasfinallypaidoff.Imadesteadilyprogressandmanagedtowinprizesinsomespeechcompetition. Soproblemscanhelpusgrowifwedealwithitbravelyandproperly.ThisiswhichI'velearnedfrommyexperience.
向一定质量AgNO3和CuNO32的混合溶液中加入Zn溶液质量与加入Zn的质量关系如图所示．下列说法不正确的是
PTSD战后创伤issadlyacommonaffliction折磨formanysoldierswhohavewitnessedconflictaninvisiblewoundthatcontinuestocauseincrediblesufferinglongafterthegunshavefallensilent. AlotofuscomehomewithoutrealizingwearebringingthewarhomewithussaidJoshMarinoaveteran退伍兵oftheIraqwarwhosufferedtheeffectsofPTSDofsuicide. Ididn'twanttodealwithitanymoreMarinosaid.Hewroteagoodbyenotegrabbedaknifeandwentoutsideforafinalcigaretteintherain.Butthenfromthedeepestdepthofdespaircamehope.Meowingoutofthebushesnexttohimcameastrayblackandwhitekitten小猫whichaccordingtoMarinojustwalkedupandstartedrubbingupagainstmylegandletmepethim.IcametolifeagainandIbrokedowncrying.Iburstintotears. Fromthisaccidentalencountereverythingchanged.MarinofoundanewpurposeinlifethroughthefriendlycatwhohenamedScoutandwhohecreditswithsavinghislife.IstoppedthinkingaboutallmyproblemsandstartedthinkingaboutallhisproblemsandwhatIcoulddotohelphimMarinosaid.Thebondbetweenthemwasinstantbutthatwasn'ttheendofthestory. MarinohasmadeavideoofhisandScout'sremarkablestoryofhealingandheartbreakwhichyoucanwatchontheInternet.Thestoryisdedicatedtoshowinghowanimalscanhelphumansthroughtoughtimesaswellashumanscanhelpthem.Itisabeautifulstorythatissuretotugatyourheartstringsshowingjusthowpowerfulthebondbetweenhumansandanimalscanbe.Weloveitandwehopeyoudotoo! 1Whatcanwegetfromthefirsttwoparagraphs? A.TakingpartintheIraqwarhadbadeffectsonJoshMarino. B.JoshMarinowoundedbadlyduringtheIraqwar. C.PTSDisakindofdiseasewhichcannotbecurednow. D.PTSDusuallyhappensafterthesoldiersdroptheirguns. 2WhydidJoshMarinosuddenlyburstintotearsaccordingtothepassage? A.Hejustcouldn'thelpcrying. B.Thelittlecatgavehimhopetotreasurelife. C.Thewildlittlecatattackedhimsobadly. D.Hesuddenlyrealizedthatthecatcametohelphimonpurpose. 3Whatisthebesttitleforthepassage? A.PTSD﹣adiseasecuredbyasoldier. B.Themanandthecat. C.Arescuebetweenasoldierandacat. D.Howcanacatbeusedtostopsuicide.
人体胃液中的酸是写化学式下同地壳中含量居前两位的元素所形成化合物为．
化学是以实验为基础的科学实验是科学探究的重要途径． 1氢氧化钠可以和酸或某些盐发生复分解反应．复分解反应发生的条件是． 2图1曲线是盐酸和氢氧化钠溶液反应得到的图象． ①该反应的化学方程式为． ②某同学取一滴c点时的溶液滴在洁净的玻璃片上加热蒸干得到白色晶体对于其成分甲同学认为是氢氧化钠和氯化钠乙同学认为是氯化钠丙同学认为是氯化钠和氯化氢．你认为哪位同学的判断正确并说明原因． 3下列仪器常用于实验室制气体的发生装置． ①实验室用A装置制取氧气该反应的化学方程为． ②实验室用石灰石和稀盐酸制取二氧化碳若气体发生装置选用图2中的B装置请简述检验该装置气密性的方法． 4图3装置可做一氧化碳还原氧化铁的实验并检验生成的气体产物． 1实验时B装置中发生的现象为． 2C装置中反应的化学方程式为． 5某同学用该装置进行实验若用200g含氧化铁质量分数为80%的赤铁矿理论上可以炼得纯铁的质量是多少
Whenadisasterstrikeshumanitarianagencies人道主义机构likeTheWorldFoodProgrammeWFPneedinformationmorethananythingelse.Theyneedaclearpictureofthedamagetoroadsandbridgesforexampletobeabletotakequickaction. WFPhaspublishedapictureofdamagetotheepicenter震中oftheearthquakewhichstruckHaiti.Thepicturewhichhasbeenproducedintheformofasatellite﹣basedmapshowsgreatdamagetotheepicenterwhere90%ofthebuildingsweredestroyed.Inthemaponepixel像素standsforhalfameterofland.That'saverycloselookofhowthingsareontheground.Ithelpedrescueteamsalot. WFP'sEmergencyPreparednessandResponseBranchproducedaseriesofclearmapsshowingthedamageofHaiti.ThemapshavebeenproducedinpartnershipwitharesearchanddevelopmentinstitutecalledInformationTechnologyforHumanitarianAssistanceCooperationandActionITHACA.TheorganizationwassetupyearsagoespeciallytoworkwithWFPinbringingdevelopmentsofsatellitetechnologyintoitsresponsetodisasters.Justafewyearsagothiswouldhavemeanthavingtowaitforhelicopterstooverflyareasandforhumanbeingstophysicallyseethedamage.Thesatelliteswhichoperatearoundhighaboveourheadsareofgreathelp.Theyareabletoseethroughcloudswhichishelpfulwhenweatherconditionspreventtheuseofopticalinstruments光学仪器. NowbothWFPandITHACAhaveteamsworkingaroundtheclocktomakeuseofmorenewtechnologiestohelppeopleactivelydealwithnaturaldisasters.Deathsandinjuriesfromnaturaldisasterscanbereducedifthedisastercanbepredicted.Severaldisasterpredictiontechnologieshavebeendevelopedovertheyears.WearealsoworkinghardtoprovideamoreeffectiveinstrumenttopredictnaturaldisasterssaidRiccardoRoscellipresidentofITHACA. 1AccordingtoParagraph1whatdoesWFPextremelyneedafteradisaster? A.Doctorsandvolunteers. B.Medicalandfoodsupplies. C.Theinformationaboutthedamage. D.Thedetailsaboutthecausesofthedisaster. 2WhatdoestheauthormainlywanttoshowuswhenhementionstheHaitianearthquakeinParagraph2? A.Thesatellite﹣basedmapisuseful. B.Itwasaveryseriousearthquake. C.Itcausedmanyinjuriesanddeaths. D.Thepictureofthedamageisunclear. 3Whatistheuniqueadvantageofthesatellitescomparedwithopticalinstruments? A.Theycanbeusedasthesubstitutionofhelicopters. B.Theycanreducedeathsandinjuriesfromnaturaldisasters. C.Theycanbeoperatedaroundhighaboveourheads. D.Theycanseethroughcloudsinbadweatherconditions. 4WhatcanwelearnfromRiccardoRoscelli'swordsinthelastparagraph? A.Itisnoteasyforpeopletopredictnaturaldisasters. B.Naturaldisasterscancausemoreterribleconsequences. C.Theyaretryingtofindoutabetterdisasterpredictioninstrument. D.Theyhavestudieddisasterpredictiontechnologiesforyears.
我国科学家研制出一种新型镁锂合金．该材料具有超轻等特性．下列说法正确的是
HalloweenComingOut Amanwasshotinthefaceduringabankrobbery.Thatwasthenewsaboutmefiveyearsago.FromthenonIneverlookedina1itevenscaredmyselfwhenseeingmydestroyedface.Ilivedinmyhousealonewithoutoutsidecontact.ButonenightIwasmakingan2.ItwasHalloween. Whatafittingnightformeto3!Ilongedforhumancontact.WhenmypumpkinlanternsmiledatoothywelcomeinmyfrontdoorIheardfootstepsandgiggling咯咯的笑aschildrencameclosetomyhouse. Trickortreattheycried. Myhandsstartedto4.Iopenedthedoorandgavethema5smilethroughmydamagedlipsbeneatharoughscarwheremynoseonce6. Doyouwantatrickordoyouwantatreat?Myvoicesoundedmorelikeaghost.The7expressiononthechildren'sfacessuggestedeverything. Treat!They8pickedacandyortwofrommybucketandrantothe9oftheirparents. Iclosedthedoorandpressedmybackagainstit.IfeltdizzybutI10it.Thenthebellrang.Trickortreat.a11voicecametome.IopenedthedoortofindasmallgirlwearingaShirleyTemplemask. HiShirley.Ispokequietlynotto12her.Aren'tyoubeautifultonight? ShestaredatherfeetandshookherheadNo. Yesyouare.You'reShirleyTemplethemostbeautifulgirlintheworld. Shelookedupatmeandpulledher13totheside.Seeingherdeformed变形的facemyheartmissedabeat. WellIthinkyouarebeautifuldarling.Isaidgently. Atthewordshereyesconnectedwithmine.Anuncertainhandreachedtowardmybucketandtookonepieceofcandy.Thankyou.Hervoicewasa14.Sheturnedandrantohermother.Inoddedmyheadtohermotherandgavethembotha15. Iclosedmydoorandturnedoffmygatelamp.My16lifebeganagain. ThenextmorningIheardmydoorbellring.Itriedtoignoreit17itrangagain.IwenttothedoorandcalledoutWho'sthere? It'sShirleyTempleandherMom. Iopenedthedoorinafew18andlooked.Itwasthewomanandherdaughterwithouthermask.BeforeIspokethemothersaidMygirlsaidshewantedtomeetyou.Iwatchedtearsstartto19inthemother'seyes.Thisisherfirsttimeoutsidewithouthermask. Ipulledthedooropenandthatwasalsothefirsttimeinfiveyearsformetoinvitesomeoneintomy20. 1A.mirror B.wallet C.pocket D.bank 2A.expectation B.appointment C.introduction D.exception 3A.act B.stay C.appear D.flee 4A.shake B.cross C.dance D.tap 5A.bitter B.friendly C.simple D.quiet 6A.lived B.sat C.breathed D.slept 7A.moved B.excited C.shocked D.puzzled 8A.easily B.politely C.sadly D.quickly 9A.security B.shadow C.defense D.sight 10A.finished B.promoted C.got D.did 11A.thin B.loud C.claim D.clear 12A.interrupt B.scare C.discourage D.cheat 13A.gloves B.hat C.mask D.glasses 14A.whistle B.whisper C.signal D.sigh 15A.glance B.wave C.hand D.surprise 16A.busy B.social C.meaningful D.lonely 17A.for B.so C.but D.or 18A.seconds B.efforts C.inches D.steps 19A.well B.dry C.freeze D.fix 20A.future B.story C.mind D.life.
人类使用材料的变化标志文明的进步下列制得材料的方法与化学反应无关的是
氢氧化钠溶液和二氧化碳反应没有明显现象为验证CO2与NaOH能够发生反应某同学按如图组装实验装置并进行实验． 1有时药品滴加顺序会影响实验现象．如果观察到的现象是“气球先膨胀后变瘪”则加入试剂的顺序应该是填序号． A．先加入盐酸再加入氢氧化钠溶液B．先加入氢氧化钠溶液再加入盐酸 2对于“气球先膨胀”后溶液中溶质的成分同学们有下列猜想①只有Na2CO3②Na2CO3和NaOH的混合物假设猜想②正确猜想①不正确．请写出证明猜想②正确的实验步骤和现象．提示Na2CO3溶液呈碱性 3写出气球“后变瘪”的化学方程式．
ABC三种物质的溶解度曲线如图所示． 1t2℃时把50gA放入50g水中能得到A的饱和溶液其中溶质和溶液的质量比为． 2将t2℃时ABC三种物质的饱和溶液降温至t1℃所得溶液的溶质质量分数的大小关系是． 3将C的饱和溶液变为不饱和溶液可采用的方法．
Theideaofrobotrulersfriendsandlovershasbeenatopicofsciencefictionnovelsforyears. Butaccordingtoonemathematicalmodelofhowourbrainscreateconsciousnessemotionalmachineswillneverexist. Thisisbecausecomputerscan'thandleanyprocessthatcompletelyintegrates整合informationsotheycannotbeconsciousorfeeloneexpertsays. AmathematicalmodelforconsciousnessdevelopedbyGiulioTononiattheUniversityofWisconsin﹣Madisonsaysthattheabilitytointegrateinformationisakeyfeatureofconsciousness. Hebelievesthatintegratedinformationcan'tbebrokendownintosmallerpiecesinconsciousmindsbecausethebraincontextualizes将……融入背景information. Forexamplewhenweseearedcircleourbrainsdon'tseetheshapeasacolourlesscircleplusashapelesscolouredareaNewScientistreported.Insteadweseeitasawhole﹣aredcircleweunderstandthewiderpicture. It'seasyenoughformachinestoeditacollectionofindividualimages图象butmemoriesaremadeupofabankofintertwined相互交织的imagesandexperiencesandcannotbechangedinthesameway. Researchershaveusedmathematicstoshowthatcomputerscannothandlethecomplexprocessesneededtofitpiecesofinformationtogetherperfectly. Thereforeifconsciousnessisbasedontheintegrationoflotsofpiecesofinformationcomputerscan'tbeconsciousandcan'texperienceemotionslikehumans. ProfessorPhilMaguireoftheNationalUniversityofIrelandinMaynoothsaysthatconsciousnesscannotbecreatedinaphysicalmachineinlimitedtimeusinglimitedmemory. Itdoesn'tnecessarilymeanthatthereissomemagicgoingoninthebrainthatinvolvessomeforcesthatcan'tbeexplainedphysically.Itisjustsocomplexthatit'sbeyondourabilitiestochangeithesaid. Hisresearchmaymeanthatlonelyhumanswillnotfindlovewitharobottheyareunlikelytobemadetheirslaveseither. 1Whydoexpertsthinkemotionalmachineswon'texist? A.Machinescan'tsolveproblems. B.Machinescan'tintegrateinformation. C.Machinescan'thandleinformation. D.Machinescan'tcommunicatewithpeople. 2TheexamplementionedinParagraph6isusedtoshow. A.machinescannotfeel B.thebrainhasconsciousness C.machinescanrecognizeshapesandcolors D.thebraincancontextualizeinformation 3Itcanbelearnedfromthetextthat. A.theideaofrobotloverswon'tcometrue B.machinescaneditintertwinedimages C.robotscanfitpiecesofinformationtogetherperfectly D.computerscanexperienceemotionslikehumansoneday 4Whatwouldbethebesttitleforthetext? A.Howrobotswork B.Robotswillneverhavefeelings C.Willrobotsbecomepeople'sfriends? D.Whatwillrobotsbelikeinthefuture?
化学与生活密切相关． 1洗涤剂除油污的原理是 2炒菜用的铁锅手柄是用填“热固性”或“热塑性”塑料做成的 3“漂白粉”的有效成分为次氯酸钙[CaClO2]在空气中它能吸收二氧化碳和水蒸气生成两种化合物其中一种是具有漂白和杀菌作用的次氯酸HClO另一种是白色不溶于水的固体该反应的化学方程式为．
化学与生产生活密切相关．下列说法不正确的是
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