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下列方程组中，是二元一次方程组的有（ ） ① ② ③ ④ ⑤
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请写出一个二元一次方程组
给出下面四个方程⑴任意两个方程所组成的方程组是二元一次方程组的概率是多少⑵请找出一个解是整数的二元一
一个二元一次方程和一个二元二次方程组成的二元二次方程组的解是或试写出一个符合要求的方程组______
解三元一次方程组的基本思想是通过消元先消去一个未知数将方程组转化为二元一次方程组则方程组经消元后可得
解二元一次方程组1有位同学是这么做的①+②得4x=20解得x=5代入①得y=﹣3.∴这个方程组的解为
下列方程组中属于二元一次方程组的有
请写出一个以xy为未知数的二元一次方程组且同时满足下列两个条件①由两个二元一次方程组成②方程组的解为
请你写出一个以xy为未知数的二元一次方程组且同时满足下列两个条件①由两个二元一次方程组成②方程组的
二元一次方程组及解法二元一次方程的概念含有⑨未知数并且未知项的次数是⑩的整式方程叫做二元一次方程.二
下列说法正确的是
二元一次方程只有一个解
二元一次方程组有无数个解
二元一次方程组的解必是它所含的二元一次方程的解
三元一次方程组一定由三个三元一次方程组成
下列说法正确的是
二元一次方程只有一个解
二元一次方程组有无数个解
二元一次方程组的解必是它所含的二元一次方程的解
三元一次方程组一定由三个三元一次方程组成
如果关于xy的二元一次方程组那么关于xy的二元一次方程组的解是＿＿＿
请写出一个以xy为未知数的二元一次方程组且同时满足下列两个条件:①由两个二元一次方程组成;②方程组的
请写出一个以为未知数的二元一次方程组且同时满足下列两个条件①由两个二元一次方程组成②方程组的解为这样
下列方程组中是二元一次方程组的是
解下列二元一次方程组及不等式组:1解二元一次方程组
若一个二元一次方程组的解是请写出一个符合要求的二元一次方程组____________________
解二元一次方程组的基本思想是即将二元一次方程组转化为一元一次方程．
若关于xy的二元一次方程组的解也是二元一次方程的解求t的值和这个方程组的解.
已知是二元一次方程组的解试写出一个符合条件的二元一次方程组__
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Wellbe.Ittakestime.I'msureitwillwork.
若与都是二次根式则=．
Hehadalongtelephonec withhisteacheryesterday.
已知|a-1|+=0则a²+b²=．
8分Themorningafteraneveningstruggletocareformythree﹣year﹣olddaughterIcouldn'twaittogethertoschool.Iasamotherwastiredfromtheangerandherinabilitytocommunicatebecauseofherslowedlanguagedevelopment. AsIaccompaniedherintothecarIfeltdesperate.Nothingwasrightwithourworld.She'dbeenbornaroundthesametimewhenthenationwaswitnessingthebirthofanotherGreatRecession.Myjobandmyhousehadbeenvictims.Thenthishappened.Mychild'slanguagedelaywasidentifiedbutdoctorsstruggledtoproperlyhelpherIfeltlikewebothneededtoherescued. Ireturnedthatafternoonasdisenchantedwiththelittlegirl1lovedaswhen1left.Walkingslowlytowardtheschool'splaygroundgateIfoundherpreschoolteacherracingtogreetme. Youshouldhaveseenhertoday!Hisbreathywordsweresupportedbyexcitement.Ididn'tinterrupt.Seethatclimber.Hepointedtoawoodenpieceofplaygroundequipmentthatlookedlikearockwall.Inodded.Welleverydaysinceshestartedschoolshe'striedandfailedtomakeittothetop.Hetookabreath.Andtodayshedidit! Heexpressedhisjoyjustashe'dwitnessedherconqueringMountEverest!Shecheeredandcelebrated!IwishI'drecordedit!Hiswordscomfortedme.Mydaughterhadconqueredhermountain. AssherantowardmeIrecognizedsomethingIhadn'tbefore.Isawherperseverance毅力.Isawherstrength.IsawaHero. Everydaygreatnesscelebratesordinarypeoplewhodounusualthingsinbigandsmallwaysshowingcouragekindnessloveandselflessness.Weencourageyoutoclickthesebriefaccountsandinviteyoutoshareyourownstory. 1Whydidtheauthorrushherdaughtertoschool? A.Shewasbusywithherworkasadoctor. B.Shehadafightwithherdaughterlastnight. C.Shebrokedownwhendealingwithherdaughter. D.ShehadtoselltheirhouseduetoGreatRecession. 2Whichofthefollowingbestexplainsdisenchantedunderlinedinparagraph3? A.Happy. B.Concerned. C.Careful. D.Disappointed. 3Whydidthelittlegirl'spreschoolteacherfeelexcited? A.ShesucceededinstandingonMountEverest. B.Shemanagedtoclimbupthewoodenequipment. C.Shegotthefirstplaceintheschoolsportsmeet. D.Shebegantocommunicatewithothersnormally. 4Fromwhichisthetextmostprobablytaken? A.Theradio. B.Amagazine. C.Anewspaper. D.TheInternet.
﹣27的立方根与的平方根的和是A．0 B．6 C．0或-6 D．-6
²=
Themuchyoureadthefasteryouwillbe.
判断下列各式哪些是二次根式x＞0x≥0y≥0．
如图在同一直角坐标系中二次函数的图象与两坐标轴分别交于A﹣10点B30和点C0﹣3一次函数的图象与抛物线交于BC两点．1一次函数的解析式为2当自变量x时两函数的函数值都随x增大而增大．3当自变量时一次函数值大于二次函数值．4当自变量x时两函数的函数值的积小于0．
x是怎样的实数时式子有意义
计算²=
=
若求a2009+b2009的值．
它的确提高了我说的技能.Itreally my.
=
15分ThetraditionalChineselunarcalendardividestheyearinto24solarterms.AwakeningofInsects惊蛰1fallonMar6andendsonMar20thisyear. AwakeningofInsectssignalsariseintemperatureandincreasedrainfall.Asthe2threesolarterminthelunaryear3itnamesuggeststhefactthatanimalssleepinginwinterareawakened4springthunderandthattheearthbeginstocomebacktolife.Itisthekeytimeforspringagricultural5activity.Itisalsoagoodtimeforpeopletoenjoyfunoutdoorsespeciallyforpeoplelivinginthecity.6drivetothesuburbsfishinginalakeorenjoyingthesingingbirdwillmakeforaperfectweekendinspring.Themostpopularfruitinthisseasonispears. EatingpearsaroundtheAwakeningofInsects7beawidely﹣practicedcustominChina.Astheweathergets8warmandtheairbecomesdrierpeopletendtofeeltheirmouthsandtonguesaredry9cancausecoldsorcoughs.Apearissweetjuicyandcoldmoistening湿润thelungstoarrestacough.10pearsarehighlyrecommendedduringtheAwakeningofInsects.
计算=
若|2009-a|+=a求a-2009²的值．
=
30分JohnnyandIlivedinasmallneighborhoodin1955.Wehadboughtourtwoyoungsonstwo1forChristmasandJohnnywouldassemblethemonChristmasEve. ButonChristmasEvedayJohnny2togotoBrookleyAirForceBaseinMobiletorepairajet.Ihadmyhands3withflourpreparingforChristmasdinnerand4twoenergeticboys. Iwasmakingthechocolatecakewhenan5knockedonthedoor.ItwasBeatricewhowasthe6persononourroadwithatelephone.Thebasehad7tosaythataheavytorquewrench扭矩扳手hadcomeapartinJohnny'shandmakingthehone8.Mysister﹣in﹣lawRuthandherhusbandOttotookmetothe9whilemymother﹣in﹣lawstayedwiththechildren. Wegotthereonlyto10Johnnywithacastonhisarmeagertogethomealthoughthedoctorrequiredthathe11.ItwasChristmasEveJohnny12andhehadbikestoassembleforhisboys.Thedoctorsaidhe'dconsider13himthenextmorningifJohnnycouldfindsomeonetodrivehimhome. OnChristmasmorningJohnnytriedcallingthemotorpool车辆调配所.Theysaid14mustcomefromhigherupsoJohnny15makingcalls.16abigbluecarrolleduptothehospitalaskingforthemanwhoneededa17home. Johnny'smotherandIwereputtingdinneronthetablewhenweheardthecar.Wewere18toseeJohnny.WithOtto'shelpJohnnyassembledtheboys'gifts. ThatcoldChristmasDayourheartswerefullof19forthosewhohadgonetheextramiletobringus20ontheholiday. 1A.cars B.bicycles C.phones D.toys 2A.asked B.refused C.had D.used 3A.full B.decorated C.related D.familiar 4A.searchingfor B.playingwith C.worryingabout D.lookingafter 5A.stranger B.engineer C.operator D.neighbor 6A.last B.right C.only D.first 7A.paused B.called C.decided D.intended 8A.broken B.dirty C.ugly D.abandoned 9A.base B.hospital C.destination D.station 10A.find B.supply C.assist D.equip 11A.leave B.rest C.stay D.relax 12A.believed B.imagined C.expected D.argued 13A.admiring B.dismissing C.rewarding D.assessing 14A.ideas B.demands C.orders D.policies 15A.started B.tried C.kept D.stopped 16A.Suddenly B.Finally C.Instantly D.Gradually 17A.lift B.recipe C.trip D.voyage 18A.thrilled B.embarrassed C.motivated D.terrified 19A.generosity B.consideration C.kindness D.appreciation 20A.close B.apart C.around D.together
25分假定你是李华你的笔友Peter所在的林肯中学将举办中国文化周活动他来信向你寻求活动相关建议.请你给他回信内容要点包括 1.活动内容及形式 2.说明推荐理由 注意 1.词数100左右 2.可以适当增加细节以使行文连贯 3.可能用到的词汇剪纸paper﹣cutting书法calligraphy
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. Iamalwaystellingtoworkhardtohaveagoodlifeinthefuture.HoweverIdomybesttoplaybasketballandstudy.IwanttobebasketballplayerwhenIwillgrowup.Torealizemydreams.Ipracticeplayingbasketballregularlyaimingtomakemybestshots.AlthoughI'minterestinginwatchingTVImanagetofinishmyhomeworkfirst.ItrymybestinallthetestsespecialinthemathtestbecauseIfindmathmoredifficultythananyothersubject.AnywayIwillsparenoeffortsandnevergiveinonmystudiesandIbelieveifIamsuretosucceed.
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100的平方根是
²=
=
10分Attheendofalongdayit'salltooeasytotakeahotshowerbrushyourteethandthenjumpintobed.1Asitturnsoutgoingtobedwithwethairisn'tasharmlessasyouprobablythought. Thefirstnegativeresultofsleepingwithwethairispurelycosmetic美容.2lfyoutrytostyleyourhairinthemorningaftersleepingonitwetyou'reprobablygoingtohavetroublestylingtheresultingcurliness卷曲funnywavesandflatsides. Whenyouwakeupyou'reprobablygoingtohavetore﹣wetitagaintoproperlydryitandregaincontrol.3. Sleepingwithwethairdoesnotimmediatelydamageyourhairbutitcancertainlyleadtohairbreakagebecausehairisweakestwhenwet. 4Firstyoucanswapyourcottonpillowcasesforsilkones.Silkhasamuchsmoothersurfacesoyouwon'texperienceasmuchunfortunatebreakage. Nextyoucanmakesuretosleepwithyourhairdowninsteadofupinatightponytail.Inadditionyoushouldreplaceyourtightbandswithasoftonethatisn'tgoingtoroughlypullatnight. 5Dryoilsandtexturizingmousses摩丝aresomeofthebestwaystoensureyoudon'twakeuplookinglikealionwhileprotectingyourprecioushairfromdamage. Nowthatyouknowhowbadsleepingwithwethairismakesureyou'renotmakingthesehairstylemistakes. A.Finallyneverskipoutonapplyingproduct. B.Herearesometipsthatcanhelpdryanyhairfaster. C.Thisunnecessarilyaddstimetoyourmorningroutine. D.Ifyouhaven'tnoticedtheendsofyourhairtendtodryfirst. E.Youcan'tpredicthowyourwethairisgoingtolookinthemorning. F.Buthaveyoueverthoughtabouttherisksofsleepingwithwethair? G.Ifyoumustsleepwithwethairthereareafewwaystominimizethedamage.
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