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用化学符号填空： （1）3个氧分子 ； （2）纯碱 ； （3）2个铵根离子 ； （4）钠离子的离子结构示意图 ．
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用化学符号或名称填空①一氧化二氮②2个镁离子③臭氧分子只含3个氧原子④AlOH3
用化学用语填空1汞元素______________22个氧分子______________3铁离子_
用相应的化学符号填空1n个硫原子2铜元素3两个氧分子________4水中氧元素的化合价为-2价__
用化学符号填空:12个氮原子24个硫酸根离子33个氧分子
用化学符号填空2个氧分子____碳酸根____+3价铁_______5个铜原子________
用化学符号填空钙元素Ca两个氧分子2O23个钠离子3Na+相对原子质量最小的元素H.4个铁原子4Fe
用化学符号填空13个氧分子2纯碱32个铵根离子4钠离子的原子结构示意图
用元素符号或化学式填空13个硫原子2硝酸32个氧分子43个铵根离子.
用化学用于填空.12个氢原子23个镁离子32个氧分子.
请你用适合的化学符号填空12个氧分子2氯化镁中镁显＋2价3铁离子4海水中含量最多的金属元素
用化学符号填空12个氧分子23个铁离子34个二氧化碳分子42个镁原子
请你用适合的化学符号填空12个氧分子▲2氯化镁中镁显＋2价▲3铁离子▲4海水中含量最多的金属元素▲
用化学符号填空①a个水分子②2个氢原子③2个铵根离子④纯碱
用化学符号填空15个钾原子23个镁离子32个氧分子4氧化铁中+3价的铁元素__________
请你用适合的化学符号填空12个氧分子2硫酸根离子3氧化铝中铝元素的化合价为+3
用化学符号表示1四个氧分子________________22个碳酸根离子___________3氯
用正确的化学符号填空1两个氢原子23个氧分子3氢氧根离子4氧化铁
化学用语是学习化学的基本工具请用化学符号或化学式填空12个氢原子_________2镁离子33个氧分
用正确的化学符号或文字填空13个氧分子____________2碳酸镁_______________
用元素符号或化学式填空13个硫原子2硝酸32个氧分子43个铵根离子5碳酸氢钠.
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15分LastyearmybrotherandIwenttoMiamiforavacation.Someofmyfriendswho1betherebeforesaiditwasawonderfulholidaydestination.Beforewewentwehadplannedformonths.Whenthedaycamewewereready. Afterourplanelandedwewenttothehotel.Wehadmadeourreservationsixmonths2earlybutthemanatthefrontdesksaidtherehadbeenamistake.We3tellthatourroomshadn'tbeenreservedforthatweek4fortheweekafter.Ididn'tunderstand5thiswouldhappenandmycreditcardhadalreadybeencharged6thereservation.What'sworsethehotelhadbeenfullybooked.Whenwewerewonderingwhattodothemanagercameout.Shewas7surprisehelpful.SheapologizedforthemistakeandgaveusaspareVIProomon8topfloor.Wehadneverstayedinsuchanamazingroomandweweren'tchargedextra. ThenextdaymybrotherandIwenttothebeach9wewatchedsomepeopleplayvolleyball.Wegotalittle10sunburnbutthedayhadbeensorelaxingthatwedidn'tmind.
10分Bullying欺凌isaprobleminmanyschools.Maybelotsofyouhaveevercomeacrossschoolbullies.1 Ignorethebullyandwalkaway.It'sdefinitelynotacoward'sresponse.Sometimesitcanbeharderthanlosingyourtemper.Walktallandholdyourheadhigh.2 Holdtheanger.Whodoesn'tgetreallyupsetwithabully?3Bullieswanttoknowtheyhavecontroloveryouremotions.Workoutyourangerinotherwayssuchasthroughexerciseorwritingitdown. 4Howeveryouchoosetodealwithabullydon'tusephysicalforce.Notonlyareyoushowingyourangerbutyoucanneverbesurewhatthebullywilldoinresponse.Youaremorelikelytobehurtandgetintotroubleifyouuseviolenceagainstabully.Youcanstandupforyourselfinotherwayssuchasgainingcontrolofthesituationbywalkingaway. Talkaboutit.Itmayhelptotalktoaguidanceadvisorteacherorfriend.5Talkingcanbeagoodoutletforthefearsandfrustrationsthatcanbuildwhenyou'rebeingbullied. A.Takechargeofthesituation. B.Thistypeofbodylanguagemeansyouarenoteasilyharmed. C.Herearesomethingsyoucandotofightbullying. D.Don'tgetphysical. E.Butthat'sexactlytheresponseheorsheistryingtoget. F.Someadultsbelievethatbullyingispartofgrowingup. G.Peopleabovecangiveyouthesupportyouneed.
15分Climatechangehascausedariseinsealevels.Thishasincreasedtheamountofsaltinfreshwater1useoncoastalfarms.Asaresultfarmersare2gradualunabletousefieldsclosetothesea.HoweverMarcVanRijsselbergafarmerintheNetherlandsisnowusinga3mixofseaandfreshwater4growhealthyandtastyvegetables.HeteamedupwithscientistsfromtheFreeUniversityanddividedafarm5eightnegatedareas.Separatepipespumpedfreshandseawaterandacomputerprogramcreatedwaterwitheightlevelsofsalinity含盐度.Thewaterlevelsandthelevelsofsalinitywas6controlbycomputerizedmeasuringdevicescalledsensors.Mr.VanRijsselbergsaidhewasabletoharvestvegetablesfrommostoftheeighttestingareas.Hesaidthevegetablesweresmallerthan7growninfreshwater.Buthesaidtheyalsohadmoresugarandsaltsotheytastedmuch8good.Hefoundthatpotatoesgrewbetterthantheothervegetablesinthecombinationofseaandfreshwater.Mr.VanRijsselbergsaidfourkindsofthesepotatoeswouldbesettoPakistan9thousandsofhectaresofland10damagebysalinizationlastyear.
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89岁的侯云德院士获得2017年国家最高科学技术奖这位著名的医学病毒学专家发现最小的病毒的半径仅有0.000009毫米将0.000009用科学记数法表示应是
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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. Istillrememberamathslesson.Mymathsteachercopiedachallengingproblemontheblackboardandasksthewholeclasswhethertherewouldbeonestudentwhoknewwhattoworkitout.Severalminutespassedbutthewholeclasswasincompletelysilence.AsmatteroffactIcameacrosstheprobleminabooktheotherday.HoweverIwalkedtotheblackboardandworkeditoutinnotime.Whatasurprisingexpressionwasonmymathsteacher'sface!Hefeltveryhappythathepraisedmeonpublic.SincethenmathshasbeenbecomeoneofmyfavoritesubjectandIhavealsomaderapidprogressinmaths.
8分Howfitareyourteeth?Areyoulazyaboutbrushingthem?Neverfear:Aninventorisonthecase.Anelectrictoothbrushsenseshowlongandhowwellyoubrushanditletsyoutrackyourperformanceonyourphone. TheKolibreetoothbrushwasexhibitedattheInternationalConsumerElectronicsShowinLasVegasthisweek.ItsenseshowitismovedandcansendtheinformationtoanAndroidphoneoriPhoneviaaBluetoothwirelessconnection. Thetoothbrushwillbeabletoteachyoutobrushrightdon'tforgettheinsidesoftheteeth！andmakesureyou'rebrushinglongenough.It'skindoflikehavingadentistactuallywatchyourbrushingonadaytodaybasissaysThomasServaltheFrenchinventor. Thetoothbrushwillalsobeabletotalktootherapplicationsonyourphonesodeveloperscouldforinstancecreateagamecontrolledbyyourtoothbrush.Youcouldscorepointsforbeatingmonstersamongyourteeth.WetrytomakeitsmartbutalsofunServalsays. Servalsayshewasinspiredbyhisexperienceasafather.Hewouldcomehomefromworkandaskhiskidsiftheyhadbrushedtheirteeth.TheysaidyesbutServalwouldfindtheirtoothbrushheadsdry.Hedecidedheneededabrushthatreallytoldhimhowwellhischildrenbrushed. ThecompanysaystheKolibreewillgoonsalethissummerforD|S99toD|S199dependingonfeatures.TheU.S.isthefirsttargetmarket. Servalsaysthatonedayit'llbepossibletoreplacethebrushonthehandlewithabrushingunitthatalsohasacamera.Thecameracanevenexamineholesinyourteethwhileyoubrush. 1WhichofthefollowingmightmaketheKolibreetoothbrushfun? A.Itcanbeusedtoupdatemobilephones. B.Itcanbeusedtoplaymobilephonegames. C.Itcansendmessagestootherusers. D.Itcantalktoitsdevelopers. 2WhatcanweinferaboutServal'schildren? A.Theywereunwillingtobrushtheirteeth. B.Theyoftenfailedtocleantheirtoothbrushes. C.Theypreferredtouseatoothbrushwithadryhead. D.TheylikedbrushingtheirteethafterServalcamehome. 3WhatcanwelearnaboutthefuturedevelopmentoftheKolibree? A.Thebrushhandlewillberemoved. B.Amobilephonewillbebuiltintoit. C.Itwillbeusedtofillholesinteeth. D.Itwillbeabletocheckusers'teeth. 4WhatisParagraph5mainlyabout? A.HowServalfoundouthiskidsliedtohim. B.WhyServalthoughtbrushingteethwasnecessary. C.HowServaltaughthiskidstobrushtheirteeth. D.WhatinspiredServaltoinventthetoothbrush.
矩形AOBC中OB＝8OA＝4．分别以OBOA所在直线为x轴y轴建立如图1所示的平面直角坐标系．F是BC边上一个动点不与BC重合过点F的反比例函数y＝k＞0的图象与边AC交于点E． 1当点F运动到边BC的中点时求点E的坐标 2连接EFAB求证EF∥AB 3如图2将△CEF沿EF折叠点C恰好落在边OB上的点G处求此时反比例函数的解析式．
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6分 CampAll﹣Star OneofaKindSummerCampsforKids WelcometoCampAll﹣StaryourNo.1summersportscampforkids!LocatedonthefamousKentsHillSchoolcampusbythebeautifullakeCampAll﹣Starhostskidsfromaroundtheworld.Whenthinkingaboutyournextovernightsummercampconsiderthebest﹣CampAll﹣Star! GreatSportsSummerCampsforKids CampAll﹣StarstandsoutamongthesuccessfulcampsintheU.S.Wehavethebestsportsfieldsandcourtstomakeyourchild'ssportscampexperienceasuccessfulone.Yourchildcanenjoyplayingforhoursinanyofourmorethan30sportsandactivitieseachday.Ourcampertostaffrateisthreetoonewhichmakesitpossibleforchildrentoreceivemorecarefulinstruction. Wehaveawidevarietyofactivitiesandsportstochoosefrom:fishingdancebasketballsoccerbaseballandtennis.Boysandgirlsaged8﹣16cancustomizetheirownschedulesinour234or6weeksummercampsessionforkids. TheaimofCampAll﹣Staristodevelopathleticskillsencourageabilitiesinleadershipfairplayandteamworkandprovideafunrewardingandmemorablesummersportscampexperience.Ourstaffhavetheexperienceandqualifiedtrainingnecessarytoensurethatyourchildhasasuccessfulmemorableandenjoyabletimeatoursummercamp. CallTodayAboutOurOvernightSummerCampsforKids Don'tletyourkidswasteanothersummerplayingvideogamesandsittingaround.Letthemenjoytheirtimeandgetsomeexerciseatourexcitingandfriendlysummersportscamp.Informationforourupcomingcampscanbefoundonourwebsite.Foradditionalinformationorquestionscontactustoday.WehopeyourkidscanjoinusatCampAll﹣Star! 1CampAll﹣Starstandsoutamongtheothersbecauseit. A.issurroundedbyabeautifullake B.providesvariousactivitiesandsports C.offerstimelyinformationonitswebsite D.allowschildrentoplayoutsidealldaylong 2OneofthegoalsofCampAll﹣staristo. A.firekids'imagination B.buildupkids'confidence C.developkids'leadershipskills D.promotekids'self﹣control 3Thisadvertisementisintendedfor. A.parents B.coaches C.staff D.Campers
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如图1在矩形ABCD中点E在CD上∠AEB＝90°点P从点A出发沿A→E→B的路径匀速运动到点B停止作PQ⊥CD于点Q设点P运动的路程为xPQ长为y若y与x之间的函数关系图象如图2所示当x＝6时PQ的值是
在﹣34﹣25四个数中任意两个数之积的最小值为．
的值等于
如图已知在▱ABCD中AE⊥BC于点E以点B为中心取旋转角等于∠ABC把△BAE顺时针旋转得到△BA′E′连接DA′若∠ADC＝60°AD＝5DC＝4则DA′的大小为．
已知a为整数且满足＜a＜则a的值为
先化简再求值其中x从﹣223五个数中适当选取一个．
6分 BLOODDRIVE&MARROW骨髓REGISTRATION Thesepatientsdeserveachanceatanormalhappyfutureandtheyrelyonthekindnessofstrangerstomakethathappen. ﹣DaisyIsabelle'sMother IsabelleisthedaughterofDaisyandSamanMirzaei.InJanuary2008Isabellewasdiagnosed诊断withageneticblooddisorderbetathalassemia.Isabelle'sbodyisunabletoproducehealthyredbloodcells.AsaresultIsabellehasbeenreceivingbloodtransfusions输血every4﹣6weekssinceshewas11monthsold.Alifetimeofregulartransfusionscanleadtoseriousmedicalproblems.Heronlychanceatanormalhealthylifeistohaveamarrowtransplant.IsabelleisanonlychildsodoctorshavestartedasearchforanunrelatedmarrowdonorthroughtheBeTheMatchRegistry.TheMirzaeifamilyasksthatyouconsiderhelpingpatientslikeIsabellebyregisteringtobeamarrowdonorandgivethegiftoflifethegiftofblood. HeldatWileyHall WednesdayMarch262014 BehindHeathmanDormitory/ButterfieldRd. 12:00PM﹣6:00PM Don'tforgettobringyourdriver'slicenseoranotherformofidentificationwhenyoudonate. Visitwww.ribc.orgtomakeanappointmentSponsorCode3390. FREEKingstonPizza!！! www.ribc.org800﹣283﹣8385 TheRhodeIslandBloodCenterdistributesbloodproductstohospitalsinRhodeIslandandSouthernNewEngland. 1Wecanlearnfromthepassagethat. A.theblooddriveisorganizedbyIsabelle'smother B.Isabellereceivesbloodtransfusionsregularly C.Isabellehasbeenillfor11months D.doctorswillsponsorIsabelle'sfamily 2ThosewhowanttohelppatientslikeIsabellecan. A.cometoWileyHalleveryWednesday B.visitwww.ribc.orgforanappointment C.contacttheirparentsat8002838385 D.callathospitalsinRhodeIsland 3Tobeamarrowdonoryoumust. A.bearelativeofthepatient B.carryadriver'slicense C.beatleast18yearsold D.applytoMichael'sFund
如图直线AB与CD相交于点OEO⊥CD于点OOF平分∠AOC若∠BOE∠AOC＝45则∠EOF为度．
下列计算正确的是
10分 TheiPonGeneration Todayitiscommontoseepeoplewhowalkaboutwithcoloredwireshangingfromtheirearswherevertheygo.Theymoveaboutintheirpersonalbubblessometimesunawareofwhat'shappeningaroundthem.1Outsidelifeisshutout.Soareyouoneofthem? Forme;walkingaroundinmyownpersonalbubbleisperfect.2What'sevenbetterwearingearphonesseemstogiveasignaltopeoplewhichsays;I'mnotavailableforchattingatthemoment. Supposeyou'reatworkandabouttomakeanincrediblebreakthrough?butacolleaguesuddenlyturnsup.Atthisprecisemomenttheslightestdisturbancewouldbreakyourconcentration.3OnceagainthosewireshangingfromyourearswouldbesuretogivethatGoaway!signal. 4It'sprobablypartofthegrowingupstagewhentheyjustwanttoignoretheirwholefamily.Whiletheirmothersgivethemlecturesaboutwhytheyshoulddotheir'Yes.Mum.''Problemsolved. Prettysoonnotonlywillwehaveprettycoloredwireshangingfromourears﹣butalsoourbrainswillbedirectlypluggedintosomenewhigh﹣techinstrument.We'llbeinavirtual虚拟的worldcommunicatingwitheveryoneelseorchoosingnottoaswelike.Inthisworldwewillallbepermanentlypluggedin.5Andtheyarechangingoursocialhabitsalongtheway. Intheendthereisathinlinebetweenusingtechnologyasatoolformakinglifebetterandbeingaslavetoit!It'ssostrange﹣suddenlyIdon'tfeellikewearingmyearphonesanymore. A.Ourinstrumentsarechangingquickly. B.Ialsohavewireshangingfrommyears. C.Inthehomesituationteenagerslovethesewires. D.Idon'thavetodealwiththenoisefromtheenvironment. E.AfterallIamlisteningtomyfavouritemusicandwouldrathernotbedisturbed. F.Listeningtomusicthroughearphonesistheperfectwaytoignoresuchinterruptions. G.Theywalkaroundintheirownspaceswiththeirpersonaldigitalnoisereductionsystems.
如图将△ABC绕点A旋转任意角度得到△AB'C'连接BB'CC'则BB'CC'等于
8分 YearofGiving YesterdayIstartedtheYearofGivingmyfirstdayofayear﹣longjourneyintoexploringtheactofgivingandthemeaningofcharity.IchoseDecember15asthestartingdatewhichmarkedthreeyearssincemymotherdiedfromheartdisease.ShewasoneofthemostgenerouspeoplethatIhaveeverknown.Shealwaysthoughtofothersfirstandcertainlyservesasaninspirationtome. Ihadaratherbusydayyesterdayironic具有讽刺意义的forsomeonewhoisunemployedrightnow.InthemorningIwenttothegymandunsuccessfullygotthephonecallfromtheunemploymentofficeforsomejobsearching.BeforeIknewititwasnoon.Igrabbedaquicklunchandrusheddowntoameeting.OnmywaytoConnecticutIwonderedifIwouldseesomeonethatIwouldfeelforcedtogivemyfirst10USDto.Iwasrunninglateanddecidedtodoitafterwards. AfterthemeetingIhadabouthalfanhourtofindthefirstpersonofmyYearofGiving!IdecidedtocheckoutDuPontCircle.IhadmetaguytherenamedJerryonceandthoughthewouldwillinglyacceptmy$10.Hewasn'ttherebutIdidseeamansittingbyhimselfwholookedreallylonelysoIapproachedhim.NowIhadtofigureoutwhatIwasgoingtosayIthinkIsaidsomethinglikeHicanIsitdownhere?IwouldliketoknowifIcouldgiveyou10?USDHeaskedmetorepeatwhatIhadsaidIdidthenhelookedatmefunnygotupandleft. IthenstartedwalkingsouthwhereIspottedamanstandingbythebusstoponConnecticutAve.Heappearedtobeinhis60s.Idon'tknowwhatdrewmetohimbutIthoughtIwouldmakemysecondattempt.Iwasabitnervousandaskedhimwhichbuscamebythatstop.ThenIexplainedthatIwasstartingayear﹣longprojecttogive10USDtosomeoneeverydayandthatIwantedtogivemy10USDfortodaytohim.ThegentlemanIlaterfoundoutthathisnamewasEdrespondedwithouthesitationthathecouldnotacceptmyofferandthatthereweremanypeoplemoredeservingthemoneythanhim.ThiswasexactlyoneofthethingsthatIhopedwouldhappen.Peoplewouldthinkofothersbeforethemselves. 1TheauthorsetthestartingdateonDecember15to. A.helpthecharity B.rememberhismother C.makeanexplosion D.fulfillawishofhismum 2Intheauthor'sfirstattempttogiveawaythemoney. A.hewasconsideredridiculous B.hehesitatedforalongtime C.hewasforcedtodonatethemoney D.hehadnotimetotakeaction 3Intheauthor'ssecondattemptthegentlemanrefusedhisofferbecause. A.hedidn'tneedother'shelp B.hethoughtmoreforothers C.hedidn'tcareaboutmoney D.hewantedtogetmoremoney 4Wecaninferthattheauthorwasinspiredby. A.truefriendship B.hisownkindness C.generousdonations D.human'sgoodnature
30分Inthediningroomofmygrandfather'shousestoodamassivegrandfatherclock.Mealsinthatdiningroomwerea1forfourgenerationstobecomeone.Thetablewasalways2withfoodfromwonderfulfamilyrecipes食谱allcontaining3asthemainingredient成分.Andalwaysthatgrandfatherclockstoodlikeatrustedoldfamily4sharingourhappiness.AsIwasachildtheoldclock5me.Iwatchedandlistenedtoitduringmeals.I6howatdifferenttimesofthedaythatclockwouldstrikewithawonderful7.Yearafteryeartheclockstruckapartofmy8apartofmyheart.Evenmorewonderfultomewaswhatmygrandfatherdideachday.He9woundthatclockwithaspecialandmagickeywhich10theclocktickingandstriking.Heneverletthatclockwinddownand11.Whenwegrandkidsgotalittleolderheshowedushowto12theclock.SeveraldaysaftermygrandfatherdiedIenteredthediningroomwithtearsflowing13.Theclockstooddesertedly14seemingsmallerandnotasmagnificentasbefore.Icouldn't15tolookatit.Yearslatermygrandmothergavemetheclockandthekey.Theoldhousewasquiet.Iopenedtheclockdoorwithmyshakinghand.Then16reverently虔诚地Ienteredthekeyandwoundtheclock.Itsprangto17.Tick﹣tocktick﹣tocklifeandchimeswere18intothediningroomintohouseandintomy19.Inthemovementofthehandsoftheclockmygrandfather20again.1A.party B.time C.place D.situation2A.filled B.cleared C.spread D.left3A.wine B.surprise C.love D.fish4A.friend B.guard C.solider D.lawyer5A.disappointed B.appealed C.surprised D.comforted6A.questioned B.remembered C.doubted D.wondered7A.sound B.noise C.voice D.ring8A.studies B.opinions C.memories D.brains9A.strangely B.usually C.carefully D.eagerly10A.got B.kept C.prevented D.set11A.break B.fall C.stop D.move12A.wind B.repair C.read D.clean13A.unexpectedly B.gently Cdifficultly D.freely14A.dumb B.alone C.quiet D.noisy15A.help B.bear C.hope D.insist16A.slowly B.quickly C.unwillingly D.naturally17A.feet B.hands C.sense D.life18A.breathed B.sung C.blown D.sent19A.mind B.eyes C.heart D.hands20A.survived B.lived C.showed D.left
1观察推理如图①在△ABC中∠ACB＝90°AC＝BC直线l过点C点AB在直线l的同侧垂足分别为ED．求证△AEC≌△CDB． 2类比探究如图②在Rt△ABC中∠ACB＝90°AC＝4将斜边AB绕点A逆时针旋转90°至AB′连接B′C求△AB′C的面积． 3拓展提升如图③在△EBC中∠E＝∠ECB＝60°．EC＝BC＝3点O在BC上且OC＝2动点P从点E沿射线EC以每秒1个单位长度的速度运动连接OP将线段OP绕点O逆时针旋转120°得到线段OF．要使点F恰好落在射线EB上求点P运动的时间t．
在一个不透明的口袋里有红黄蓝三种颜色的小球这些球除颜色外都相同其中有5个红球4个蓝球．若随机摸出一个蓝球的概率为则随机摸出一个黄球的概率为
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