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先化简，再求值：，其中a满足a2+3a＝5．
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先化简再求值其中.
先化简再求值÷x+3﹣其中x=﹣5.
先化简再求值其中a=﹣5.
先化简再求值其中
先化简再求值其中a满足a2+3a=5．
先化简再求值其中x满足x2﹣4x+3=0.
先化简再求值其中x＝－5.
先化简再求值÷a+2﹣其中a满足a2+3a=5.
先化简再求值a＋2a－2＋a1－a其中a＝5.
先化简再求值其中x=－2y=5.
先化简再求值其中x是满足－2≤x≤2的整数.
先化简再求值•其中a=5.
先化简再求值其中ab满足＋|b－|＝0.
先化简再求值其中x满足方程x2＋4x－5＝0.
先化简再求值其中=5.
先化简再求值a+2a﹣2+a1﹣a其中a=5．
先化简再求值{a+b2﹣a﹣b2}•a其中a=﹣1b=5.
先化简再求值其中x满足x2-x-1=0.
先化简再求值:其中x的值满足方程.
先化简再求值其中a=﹣5.
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已知am=3an=2则a2m-n的值为
25分假定你是李华.你在网上得知在你市留学的Larson最近总是失眠你决定给予他帮助.就此请你用英语给他写封电子邮件内容包括: 1.进行安慰; 2.询问失眠的具体原因; 3.约定地点以便当面详谈. 注意: 1.词数100左右; 2.可以适当增加细节以使行文连贯.
8分WhenIwas12yearsoldIalreadyknewthatmyteenyearsweregoingtobetheworstyearsatmylife.Iwasatotaloutsiderbullied欺凌atschool.Ifeltcompletelyaloneinmysmalltown. ButbystartingtodovolunteerworkwhenIwas14Iturnedmyproblemintoapassionforhelpingothers.Theopportunitytopracticekindnessmademefeellikemylifehadagreaterpurpose.ThemorepositiveenergyIsharedthemorekindnessandappreciationIreceived.Irealizedthatmypurposeinlifewouldbetoreachouttopeoplespecificallyteenagersandhelpthemfeellessalone. Booksweremytimefriendsbackthen.Iwassothankfulthattheauthorswrotethosebooks.Thekindnesstheyofferedmewiththeirbookssavedmylife.OneofmybiggestdreamswastobecomeanauthorsoIcouldwritebooksthatwouldhelpotherteenagersthewaythosebookshelpedme. AftersurvivingterribleexperiencesatschoolandathomeImadeachoicetotaketheoptimisticpositiveroadinthenextstepsofmyjourney.MydreamcareeriswhatIamdoingnow.Ihavebeenafull﹣timeauthorofteennovelssince2007andamgratefulforthisamazingopportunitytoreachouttoreaderseverysingleday. KindnesssavedmewhenIneededhelpthemost.Evensmallactsofkindnesscanchangesomeone'slife.Youneverknowwhatsomeoneelseisgoingthrough.Butbypracticingdailykindnessyoubecomeanarchitectofpositivechange. 1Whatwastheauthor'slifelikewhenhewas12 A.Boring. B.Peaceful. C.Unhappy. D.Meaningful. 2Howdidthevolunteerworkbenefittheauthor A.Itmadehimpopularinhistown. B.Ithelpedhimfindthemeaningoflife. C.Ithelpedhimunderstandothers'livesbetter. D.Ithelpedhimfallinlovewithreading. 3Whydidtheauthorchoosewritingashisjob A.Hewasinspiredbyhisteacher. B.Hecouldpasspositiveenergytoreaders. C.Hewantedtosharehisschoolexperiences. D.Hefoundhehadatalentforwriting. 4Whatdoestheauthorsuggestreadersdointhelastparagraph A.Saynotobulliesbravely. B.Inspireotherstomakepositivechanges. C.Treatotherswithkindnessindailylife. D.Learntocaremoreaboutothers'feelings.
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如图数轴上表示1的对应点分别为点A点B．若点A是BC的中点则点C所表示的数为 A． B． C． D．
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求下列各式中未知数的值|a-2|=
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若=2=-3则b-a的值是
计算-3a42-a·a3·a4-a10÷a2
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计算
30分Bookshavegreatpower.Betweentheir1readerscanbetransportedtoanywhereimaginableandbecomejustaboutanyone…oranything.Unfortunatelymanychildrenallovertheworlddon'thave2tobooks. ForseveralyearsnowMariaKellerateenagerfromMinneapolisMinnesotahasbeentryingto3thatfact. Whenshewas8yearsoldMariaalready4reading.Shealsonoticedthatsomeofher5didn'treadasmuchasshedid.Whenshe6hermotherwhythatwashermothersaidthattheymightnotbeableto7books.Mariahadneverthoughtofthis.Shecouldn't8thatsomechildrendidn'thavebedtimestoriesreadtothemandshebecame9tochangethis. Withhermother'shelpMaria10ReadIndeedwhichisanon﹣profitorganizationdedicated致力于tocollectinganddistributingbookstochildren11. DuringtheearlystagesofReadIndeedMariasetthe12ofcollectinganddistributing1millionbooksbythetimeshewas18. Itdidn'ttakelongto13thatgoal﹣todateshehascollectedover2.4millionbooksandhas14themtomanystatesandcountriesaroundtheworld. ShesaidIcannotlivewithout15.AsIcontinuemymission使命Ihavelearnedthatthe16ofkidswhohavenobooksisinthehundredsofmillions.SoIjustcan't17evenafterreachingmy18goalof1millionbooks. Sherecentlysetanewgoal:to19donationstokidsinneedineverystateintheUSandeverycountryintheworld.Shekeepstrackofher20onalargemapatthewarehouse仓库whereherbooksarestoredandsorted. 1A.themes B.pages C.blanks D.columns 2A.access B.time C.power D.regard 3A.accept B.introduce C.change D.understand 4A.imagined B.advised C.escaped D.loved 5A.classmates B.students C.teachers D.relatives 6A.showed B.asked C.required D.reminded 7A.choose B.spare C.afford D.keep 8A.decide B.explain C.believe D.agree 9A.excited B.worried C.satisfied D.determined 10A.contacted B.created C.studied D.discovered 11A.insafety B.indanger C.introuble D.inneed 12A.goal B.point C.rule D.limit 13A.set B.get C.reach D.start 14A.sold B.shipped C.lent D.returned 15A.food B.water C.friends D.books 16A.number B.variety C.reasons D.doubts 17A.setoff B.getaway C.dropoff D.giveup 18A.common B.original C.important D.distant 19A.distribute B.collect C.attach D.devote 20A.experience B.research C.progress D.investment
8分Mostofusaretaughttopayattentiontowhatissaid﹣thewords.Wordsdoprovideuswithsomeinformationbutmeaningsarederivedfromsomanyothersourcesthatitwouldhinder阻碍oureffectivenessasapartnertoarelationshiptorelytooheavilyonwordsalone.Wordsareusedtodescribeonlyasmallpartofthemanyideasweassociatewithanygivenmessage.Sometimeswecangaininsightintosomeofthoseassociationsifwelistenformorethanwords. Wedon'talwayssaywhatwemeanormeanwhatwesay.Sometimesourwordsdon'tmeananythingexceptI'mlettingoffsomesteamsodon'ttakeitseriously.Idon'treallywantyoutopaycloseattentiontowhatI'msaying.JustpayattentiontowhatI'mfeeling.Mostlywemeanseveralthingsatonce.ApersonwantingtopurchaseahousesaystothecurrentownerThisstephastobefixedbeforeI'llbuy.TheownersaysIt'sbeenlikethatforyears.Actuallythestephasn'tbeenlikethatforyearsbuttheunspokenmessageis:Idon'twanttofixit.Weputupwithit.Whycan'tyouThesearchforamoreexpansiveviewofmeaningcanbedevelopedofexaminingamessageintermsofwhosaiditwhenitoccurredtherelatedconditionsorsituationandhowitwassaid. Whenamessageoccurscanalsorevealassociatedmeaning.Letusassumetwocouplesdoexactlythesameamountofkissingandarguing.Butonecouplealwayskissesafteranargumentandtheothercouplealwaysarguesafterakiss.Theorderingofthebehaviorsmaymeanagreatdealmorethanthefrequencyofthebehavior. Wewoulddowelltolistenforhowmessagesarepresented.ThewordsIfsurehasbeennicetohaveyouovercanbesaidwithemphasisandexcitementorritualistically例行公事地.Thephrasecanbesaidonceorrepeatedseveraltimes.Andthemeaningsweassociatewiththephrasewillchangeaccordingly.Sometimesifwesaysomethinginfrequentlyitassumesmoreimportance;sometimesthemorewesaysomethingthelessimportanceitassumes. 1Whatdoesthepassagemainlytellus A.Wordsprovidelistenerswiththemostimportantinformation. B.Listenerscangaininsightiftheylistenforwordscarefully. C.Thecomprehensionofamessageisinfluencedbyafewfactors. D.Whenmessagesarepresentedisofgreatimportance. 2WhatdoestheunderlinedsentenceI'mlettingoffsomesteaminPara.2probablymean A.I'mjustkidding. B.I'mjustcallingyourattention. C.I'msayingtheopposite. D.I'mgivingsomeimportantinformation. 3Whyshouldn'tpeoplerelytoomuchonwordsalone A.Wordsareusedtodescribeabigpartofthemanyideas. B.Wordsalwayssuccessfullyrepresentwhatwesay. C.Listenersmaynotdevelophealthyrelationships. D.Listenerswillfailtounderstandtheunspokenlanguage. 4HowdoestheauthordevelopPara.3 A.Byraisingquestions. B.Bylistingdata. C.Bygivingexamples. D.Byanalyzingcausesandeffects.
8分MarylandisexpectedtobecomethefirststateoftheUSAtobanfoam泡沫橡胶foodpackagingtakeoutcontainersandcups.Thenewproposedlawpassedbothofthestate'slegislativebodies立法机关thisweekwithenoughvotestooverrideapotentialrejectionsignedbyGov.LarryHoganwhohasnotpubliclysignaledwhetherhesupportedthelawornot.Thelawwouldbecomethelatestinagrowingeffortworldwidetobankindsofsingle﹣useplasticproductsduetotheirimpactsontheenvironment. WiththestatewidepreviousbaneffortMaryland'stwocountiesPrinceGeorgeandMontgomeryhadalreadybannedfoampackaging.Del.BrookeLiermanwhointroducedsimilarlegislationlastyearandin2017sayschangingpublicopinionhelpedherthirdattemptsucceed. Ithinkwehavereachedadangerpointshesays.Peopleareseeinghowcommonsingle﹣useplasticsareandthattheyarenotrecyclableandnevergoingaway.Peoplearebeginningtounderstandtheimportanceoflivingmoresustainably. Thenewlawwouldbanfoamfoodpackagingforproductspackagedin﹣stateincludingrestaurantscafesfoodtrucksandgrocerystores.Thefinalversionofthebillincludesexceptionssuchasmeat.ThebanwouldgointoforceonJuly12020andwouldcarryfinesof﹩250. ThelegislationwasopposedbytheMarylandRetailersAssociationwhichwarnedthatoutlawingfoampackagingcouldhurtsmallbusinessesbyhighercosts.Foampackagingremainspopularamongrestaurantsandthefoodindustrybecauseitislightweightinexpensiveandkeepsfoodanddrinkshot. Foamfoodcontainershavebeenbannedincitiesorcountiesin11statesincludingSeattlePortlandWashingtonD.C.SanFranciscoandnumerousothercitiesinCalifornia.AbaninNewYorkCitytookeffectatthebeginningofthisyearafteralonglegalbattleendedlastsummer. 1HowdidMarylandcarryoutthebanoffoamfoodpackaging A.Bypassinganewlaw. B.Byfiningfoampackagingusers. C.Byclosingsomelocalcompanies. D.Byteachingpeopletofocusontheenvironment. 2Whatdoestheunderlinedwordoverrideinparagraph1mean A.Explain. B.Prove. C.Reject. D.Tolerate. 3WhatisthekeytothethirdsuccessaccordingtoDel.BrookeLierman A.Learningfromothercities. B.Gettingmedium'ssupport. C.Changingpublicopinion. D.Hurtingsmallbusinesses. 4Whatcanwelearnfromthetext A.Foamfoodpackageswilldisappearintheworld. B.PeopleinMarylandsupportthelawabsolutely. C.Foamfoodpackageshaven'tanyadvantageatall. D.MeatwillbeallowedtobesoldinfoamfoodpackagesinAmerica.
已知5x-1的平方根是±34x+2y+1的立方根是1求4x-2y的平方根．
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25分假如你是一名高二的学生名叫李华.请你就本校食堂存在的问题向校长写一封投诉信.内容包括: 1.投诉的原因; 2.投诉的具体问题2﹣3点; 3.提出合理的建议. 注意:1.词数100左右;开头和结尾已经给出不计入字数; 2.可以适当增加细节以使行文连贯. DearHeadmaster I'mLiHuaaSenior2student. SincerelyYours LiHua
30分OnemonthagoSarahboughtalipstick口红shehaddesired.It'snot1butitmadeherhappybecauseitwastheonethatshehadbeen2sinceshesawit.Everymorningwhenshe3hermakeupeverythingseemsbrandnewduetothislipstick.Itfeelslikethatthewholedayisfullof4.Sarahhaslongbeenaccustomedto5herselfthroughshopping.Andthisdesireformaterialpossession6hertoworkhard.Shefeels7aboutthis.Her8keepsgettingbetterallbecauseofthiskindofdesire.Buthermotherthinksquite9.Severaldaysagowhenhermothercametoknowthe10ofthelipsticktheykept11foralmostawholeday.Hermotherthoughtthatitwas12wrongtospendsomuchonsuchmeaninglessitemswhileSarahthoughthermotherwastotally13aboutit.WhatSarahdidn'tknowwasthathermotherhadoncebeenalittlegirlwhohad14inpovertyandstarvation.Thatlittlegirlcouldnotfindenoughclothesto15inwinter.Thatgirlneededtolearnhowtospendeverypenny16itweretwoinordertosurvive.It'sjust17thattwopeoplecan'tunderstandeachotherevenformotheranddaughterbecauseeverybody's18isdifferent.Trytobepatientwiththepeoplearoundyou.Trytogetto19them.Trytostandintheirshoes.Ifyoucannotlistentopeoplehowcanyou20themtolistentoyou1A.dear B.cheap C.famous D.handy2A.longingfor B.headingfor C.leavingfor D.payingfor3A.putsoff B.putsaway C.putson D.putsback4A.anxiety B.hate C.laughter D.hope5A.rewarding B.devoting C.adapting D.forgiving6A.warns B.persuades C.begs D.drives7A.cautious B.good C.stressed D.negative8A.career B.relationship C.life D.study9A.firmly B.differently C.logically D.obviously10A.quality B.brand C.material D.price11A.waiting B.quarreling C.shopping D.gossiping12A.probably B.approximately C.slightly D.completely13A.unreasonable B.uncomfortable C.enthusiastic D.curious14A.turnedup B.brokenup C.grownup D.keptup15A.wear B.sell C.exchange D.clean16A.eventhough B.incase C.asif D.sothat17A.unlikely B.necessary C.strange D.natural18A.experience B.knowledge C.character D.family19A.move B.forgive C.know D.copy20A.force B.expect C.order D.advise
10分Itisimportanttoteachyourdogtoguardyouandtheothermembersofyourfamilytofightagainstdanger.Herearesometipsonhowtotrainyourdogtoprotectyou. 1. Itisveryimportanttointroduceyourdogtootherpeopleandletitinteractwiththem.Agoodguarddogisfriendlytothepeoplearoundit.Thisexerciseisveryimportantbecauseitwillhelpthedogdistinguishbetweengoodpeopleandbadpeople.2. Usepropercommands Adogactsaccordingtohowithasbeentrained.Theonlywaytodothisisthroughcom﹣mandsandyourownbodyactionsandsounds.CommandthedogtoattackbysayingthewordAttackloudly.SoonwheneveryouusethecommandAttack!yourdogwillunderstandthatitneedstofightthethingyouarepointingat.3youmustalsotrainittostoptheattack. Teachnightguarding Teachyourdogtokeepacheckonthehousebytakingitaroundthehouseandmakingitsniffthearea.Youwillneedtodothisacoupleoftimessothatthedogunderstandsthatitneedstokeepacheckeverynight.4.Itwillcheckthehouseandreturnbackindoors. Rewarditforitsgoodbehavior GivingrewardssuchasapatahugverbalpraiseGooddog!ortreatsisanexcellentwayoflettingthedogknowthatyouarehappywithitsbehavior.5itisyourdutytomakesureyourdogisrewardedforitsgoodbehaviorandpunishedforitsbadbehavior.PunishmentinvolvesscoldingthedogbyusingthecommandBaddog!orNoverybad!Thiswillhelpthedoglearnthatitmustn'tdocertainthings. A.Sinceyouarethemaster B.Encouragecommunication C.Whileyouaretrainingthedogtoattack D.Trainanolderdogtoprotectitsmaster E.Afterafewdaysthedogwillbegintocheckonitsown F.Peoplewhoaregoodwillbethosewhoareallowedtocomeclosetoit G.Ifyourdogdoesnotcomeinsideyouwillneedtocommandittogetback
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处语言错误每句中最多有两处.每处错误仅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. I'vehadmanydreamssinceIwasachild.Nowmydreamistoopensacafe.Thoughitmayappearsimpleitrequiredalotofideasandefforts.WhatIwantisnotjustanordinarilycafebutaveryspecialone.IwantmycafehaveaspecialthemesuchaslikeTangDynasty.Inthecafecustomerswillenjoyyourselvesinthehistoricalenvironmentwhatiscreatedforthem.IfIsucceedinmanageoneIwillopenmore.Iwishtohaveachainofcafesinmanydifferentcity.Eachofmycafeswillhaveadifferentthemeandanuniquestyle.
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