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在数轴上，m点表示的数3，那么与m点相距4个单位长度的点所表示的数的相反数是
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在数轴上的点A.表示的数为2.5则与A.点相距3个单位长度的点表示的数是.
数轴上的点A.表示的数是+1.5那么与点A.相距3个单位长度的点表示的数是.
在数轴上点P表示的数是2那么在同一数轴上与点P相距5个单位的点表示的数是_________.
在数轴上与表示－2的数相距4个单位长度的点对应的数是
已知数轴上表示的点为M.那么在数轴上与点M.相距3个单位的点所对应的数是__________.
在数轴上表示点A.的数是3则与点A.相距4个单位长度的点表示的数是_________
若数轴上表示2的点为M.那么在数轴上与点M.相距4个单位的点所对应的数是__________.
已知数轴上表示-5的点为M那么在数轴上与点M相距3个单位的点所对应的数是．
在数轴上的点M对应的数是那么与M相距1个单位长度的点N所对应的数是多少
数轴上的点M.表示－5在同一数轴上与点M.相距3个单位的点表示的数是________.
在数轴上点A.所表示的数为2那么到点A.的距离等于3个单位长度的点所表示的数是
在数轴上距表示-1的点相距4个单位长度的点表示的数是.
数轴上表示的点为M.那么在数轴上与点M.相距3个单位的点所对应的数是.
在数轴上点A对应的数是那么在数轴上与点A相距3个单位长度的点表示的数是．
数轴上的点
表示的数是+2，那么与点A.相距5个单位长度的点表示的数是【 】 A.5
±5
7
7 或﹣3
数轴上点A.所对应数的是－3那么与点A.相距4个单位长度的点所表示的数是
在数轴上点A.所表示的数为2那么到点A.的距离等于3个单位长度的点所表示的数是.
在数轴上与表示的点相距3个单位长度的点所表示的数是
在数轴上点A表示的数是﹣5．那么在数轴上与点A相距4个单位长度的点所表示的数．
若点A.在数轴上对应的有理数为－2那么与A.点相距5个单位长度的点所对应的有理数是
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WhenIwasyoungeachmorningIwokeupandwouldfindmyfathernowherearoundthehouse.Heusuallygotupearlybefore1andbeganmilkingthecowandcleaningthefarmyard.Insummerhegotup2earliertomopthegrassandwatertheflowersandvegetablesinthegarden.OnceIhelpedmyfatherto3weeds杂草fromthecornfield.Itwaslong4Ifeltverytiredbutthefieldridge田垄seemed5.FinallyItotallythrewmyself6inthefieldfeeling7.Mydadseemedtohave8mymind.HecameupandsaidFarmingisbackbreakingandreallytakes9andsweatbutin10thesweetharvestwillbeworththe11.EncouragedbyhiswordsIstruggledtomyfeet.Myfather12andaddedRomeisnotbuiltina13butitcanbebuiltinhundredsofdays.Sowhenever14withahugeprojectjustbreakitinto15partsandthencompleteitonebyone.Finallyyouwillbeamazedatyour16.HearingwhathesaidIwasgreatly17andcontinuedremovingtheweedsfrompatchtopatch.BelieveitornotattheendofthedayI18inweedinghalfanacreofcornfield. NowIhavetrieddifferentjobsandfinally19downabigrestaurant.Inmylifetimemyfather'sdevotiontohisjobandhisspecialworkingmethodscanalwaysencourageandguideme20allkindsofdifficulties. 1A.dark B.dawn C.noon D.midnight 2A.less B.equally C.even D.extremely 3A.forbid B.throw C.drop D.remove 4A.before B.whenever C.since D.until 5A.changeable B.endless C.faraway D.boring 6A.open B.flat C.away D.aside 7A.angry B.disappointed C.hopeless D.embarrassed 8A.read B.disturbed C.spoken D.seen 9A.pains B.time C.courage D.patience 10A.winter B.spring C.summer D.fall 11A.strength B.effort C.cost D.risk 12A.smiled B.regretted C.sighed D.followed 13A.second B.month C.day D.year 14A.faced B.discouraged C.dealt D.worked 15A.good B.various C.small D.large 16A.result B.achievement C.failure D.change 17A.inspired B.shocked C.delighted D.puzzled 18A.managed B.failed C.succeeded D.avoided 19A.settled B.broke C.bent D.pulled 20A.around B.to C.with D.through
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.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. 修改在错的词下画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. DearMary I'mpleasingthatyouwillcometoChinatostudythelanguageandculture.LivinginChinamightseemalittlestrangeatfirstsoI'msureyou'llsoonlikeit. Chinesepeopleisveryfriendlyandeasygoingsoifyouaresociableitwillbeeasilyforyoutogetusedtothelifehere.I'llintroduceyoumyfamilyandfriendandyouwon'tfeellonelyI'msure.Besideit'llhelpmetolearnChineseandChineseculture. InthewordI'lltrymybesttomakeyoufeelatmyhomeandI'mlookingforwardtomeetingyou. Yours John.
Momwantedonlyonethingforherbirthday.Canyoufindmeanothercopyofthissong?sheaskedandhandedmeaworn﹣outcassettetape.IknewexactlywhatwasrecordedonitMyRedeemer救世主.Iheardthesongplayedatleastathousandtimeswhilegrowingup.Aftersomanyyearsthecassettetapewastoowornouttobeused.IpromisedherIwouldfindareplacement. MyRedeemerbecameMom'sfavoritesongaftermyyoungerbrotherTimwaskilledbyadrunkdriverin1973.TheonlythingthathelpedhercalmdownwasthesoulfulsoundofMyRedeemerfromthelocalradiostation. Werecordeditonacassettetapesoshecouldlistentoitanytimeshewantedbutnoneofusknewwhothesoloist独唱者was.ThesedaysIthoughtthesongwouldbeeasytofindout.IwenthomeandsearchedtheInternet.SeveralsongswiththattitlepoppedupbutnoneofthemwastheoneMomloved.Igotfrustrated. Mom'sbirthdaydrewnearandthenonedayIwasdrivinghomelisteningtoourlocalradiostation.Afamiliartunecameon.ItwasMyRedeemer!AssoonasIcouldIphonedthestation.IgotalineonthesoloistwhowascalledAlanParks.ItypedhisnameintoGoogleandfoundhishomenumberinSouthCarolina.MinuteslaterIwastellinghimhowmuchhisrecordingmeanttoMom.HeofferedtoshiptwoCDsouttomepersonally.Igavehimmyaddress. RedLionPennsylvania?hesaid.DoyouknowtheLogans?Theyareourneighbors!I'vebeenfriendswiththemfor25yearsAlansaid.They'llbeatmyconcertatYorkGospelChapelonApril17th.Wouldyouandyourmomcometoo?Wesurewould.MomwasexcitedtohearAlansingMyRedeemertoherliveinconcert﹣ontheeveningofher87thbirthday. 24.WhywasthesongMyRedeemersoimportanttotheauthor'smother? A.Itcouldcomforthersadandpainfulmood. B.Itremindedherofthelovefromherhusband. C.Itwasgiventoherbyaveryimportantfriend. D.Itwastheonlythingthattheauthor'sbrotherlefther. 25.WhatdoestheunderlinedpartgotalineoninParagraph3mean? A.Talkedhappilywith. B.Thoughtalotabout. C.Maderequestof. D.Gotinformationabout. 26.WhatcanwelearnaboutAlanParksfromthispassage? A.HelivedinRedLionPennsylvania. B.Heisakindandwarm﹣heartedmusician. C.Heofferedtogivetheauthortwocassettetapes. D.Hewouldsingfortheauthor'smomontheradiostation. 27.Whichofthefollowingismostsurprising? A.AlanParksandtheauthorlivedinthesameneighborhood. B.AlanParkshappenedtogettoknowtheauthor'smother. C.Theauthor'smotherwenttotheconcertonherbirthday. D.Theauthor'smotherbecamegoodfriendswithAlanParks.
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Most7﹣year﹣oldgirlsareplayingBarbieandjumpingrope.ThoughSailorGutzlermayhaveenjoyedthose41shewasalsoanactiveparticipantin42activitieswithherfather.Hewasapilotandhetaughther43skills.Sheactuallyusedthese44whenherfamily'stwin﹣engineplane45upsidedowninruralKentucky.They'dbeentraveling46toIllinoisincoldweatherfromaChristmasvacationinKeyWestFlorida. Sailorhadbrokenbonesbutwhenshecouldn't47herfathermothersisterorcousinafterthecrashshe48herselffromtheremainslitastickontheburningwingoftheplaneandwalked49foramilethroughthecolddarknessofthewoodedKentucky50. Sailor51thenearesthousehopingtogethelpforher52.Shetoldthewomanwhoansweredthe53thatshe'dbeeninan54andthatherparentsweredead. Thoughthetemperaturewas5℃belowzeroSailorwaswearingclothingmeantforthe 55Floridaandonlyhadononesock.56she'sasurvivor. Thoughherfatherhadbeen57sincehewas16andwasaflight58formorethan4000hoursdisasterstillstruck.Hehadmadethesameexact59manytimesbutstilltheweatherwon.60he'dtaughthisdaughterwhattodoandshedidit. 41.A.ropes B.sports C.activities D.dolls 42.A.outdoor B.social C.school D.daily 43.A.repair B.flight C.communication D.survival 44.A.skills B.tricks C.thoughts D.activities 45.A.flew B.landed C.swung D.appeared 46.A.around B.home C.abroad D.everywhere 47.A.wakeup B.strugglefor C.calloutto D.getcontactwith 48.A.hid B.supported C.pulled D.protected 49.A.fast B.steadily C.heavily D.endlessly 50.A.countryside B.tunnel C.wonderland D.desert 51.A.gotreadyfor B.wentonfor C.madeitto D.lookedforwardto 52.A.fear B.loss C.plane D.family 53.A.question B.request C.girl D.door 54.A.crash B.attack C.holiday D.dilemma 55.A.remote B.warm C.rainy D.famous 56.A.Actually B.Besides C.Finally D.Still 57.A.practicing B.flying C.studying D.fighting 58.A.agent B.planner C.steward D.instructor 59.A.decision B.trip C.mistake D.plan 60.A.Previously B.Accidentally C.Fortunately D.Amazingly
Forfamiliesonvacationaplaygroundprovidesawelcomebreak.Itcanalsoprovideaglimpseintothelocalculturefromthesetupoftheparktothewaysfamiliesinteract.Herearethedesignsthatliveuptothatchallenge. FruitandScentPlaygroundStockholm Isthereapickyeateronasteadydietofchickenfingersandcheese?PerhapsatriptoSweden'sFruitandScentPlaygroundwillchangehisorherculinary烹饪的tune.ThisplaygroundfeaturesabananaslideanorangeseesawpearhutsawatermelonjunglegymandapairofcherryswingsalldesignedbypublicartistJohanFernerStrom.Nowwhocansayyoucan'tplaywithyourfood? NishiRokugoParkTokyo LocatedbetweencentralTokyoandthecityofKawasakiNishiRokugocombinesrecycledrubbertires橡胶轮胎withtraditionalplaygroundequipment.Intotalmorethan3000tiresofdifferentsizesareusedtocreatetunnelsbridgestallsculpturesforclimbingandofcoursetireswings.There'slittleshadesoyoucanvisithereintheearlymorningorlateafternoonforthemostcomfortableweatherandbesuretowearyourplayclothes. BicentennialChildren'sParkSantiagoChile BicentennialChildren'splaygroundinMetropolitanParkwasbuilttocelebrate200yearsofChileanindependenceandimprovethelivesofSantiagocitizens.Dozensofslidesarebuiltintotheslopecreatingadesigncompletelycomplementary互为补充的ofthesurroundinglandscape.Fountainsoffersomerelieffromthesunandampleseatinggivesparentsaplacetorelax. 1WhatcanbelearnedaboutFruitandScentPlayground? A.ItislocatedinTokyoJapan. B.Itsdesignwasledbysomeartists. C.Itisaimedatbalancingpeople'sdiet. D.Itsfacilitiesaremodeledafterfruits. 2WhenvisitingNishiRokugoParkitisbetterto. A.wearthickprotectiveclothes B.avoidmomentswhenit'shot C.takeumbrellasandraincoats D.watchoutfortheequipment 3WhydoestheauthorrecommendBicentennialChildren'sPark? A.Itbecomespartofthesurroundings. B.Itwasbuilttoimprovepeople'slives. C.Itamuseskidsandhelpsparentsgetrelaxed. D.Itprovidesslidesforbothchildrenandadults.
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Youcantellalotaboutpeoplebylookingattheirhair﹣notjustwhethertheybrushsprayorblow﹣dry.Scientistshavefoundawaytousehairtofigureoutwhereapersonisfromandwherethatpersonhasbeen.Thefindingcouldhelpsolvecrimesamongotherusefulapplications. Wateriscentraltothenewtechnique.Theliquidmakesupmorethanhalfanadulthuman'sbodyweight.Ourbodiesbreakwaterdownintohydrogen氢andoxygen.Atomsofthesetwoelementsendupinourtissuesfingernailsandhair. Butnotallwateristhesame.Hydrogenandoxygenatomscanvaryinhowmuchtheyweigh.Inthecaseofhydrogenforexampletherearethreetypesaccordingtotheirweights.Eachtypeiscalledahydrogenisotope同位素.Anddependingonwhereyoulivetapwatercontainsdifferentisotopes. Canhairrecordthisinformation?That'swhatJamesR.EhleringeranenvironmentalchemistattheUniversityofUtahwondered.Tofinditoutheandhiscolleaguescollectedhairfromhairstylistsin65citiesacrosstheUnitedStates.Eventhoughpeopledrinkalotofbottledwaterthesedaystheresearchershavefoundthatpeople'shairhasthesameisotopesasfoundinlocaltapwater.That'sprobablybecausepeopleusuallycooktheirfoodwiththelocalwater. Authoritiescannowusetheinformationtoanalyzehairsamplesfromcriminalsorcrimevictimsandnarrowtheirsearchforclues.ForexampleonehairsampleusedinEhleringer'sstudycamefromamanwhohadmovedfromSanFranciscotoSaltLakeCity.Ashishairgrewitreflectedhischangeinlocation. 1WhatdoweknowaboutthehydrogenisotopesaccordingtoParagraph3? A.Theyareclassifiedbysize. B.Eachtypeofthemdiffersinweight. C.Theycanimprovethequalityoftapwater. D.Someofthemcannotcombinewithoxygen. 2Whyisitpossibletoknowwherepeoplearefrombyanalyzingtheirhair? A.Peopleusethesamebottledwater. B.Peoplewashtheirhairindifferentways. C.People'shairisaffectedbytheweatheroftheplacestheystay. D.People'hairindicatesthetypeofwaterintheplacestheystay. 3Thelastparagraphismainlytoshow. A.howtorecognizecriminals B.howtocollecthairsamples C.theusefulnessofhairanalysis D.theprocessofEhleringer'sstudy 4Whichofthefollowingcanbethebesttitleforthepassage? A.Watercomposition B.Changeyourhair C.Hairdetectives D.Nowayout
如图所示在一个小烧杯里加入研细的20gBaOH2•8H2O晶体． 1将此小烧杯放在事先滴有3～4滴水的玻璃片上然后向小烧杯中加入10gNH4Cl晶体并用玻璃棒快速搅拌．实验中要用玻璃棒搅拌的原因是． 2写出有关反应的化学方程式该反应填“是”或“不是”氧化还原反应． 3该实验中观察到的现象除产生刺激性气味的气体及反应混合物呈糊状以外还有． 4通过最后一个现象可以说明该反应为填“吸”或“放”热反应这是由于反应物的总能量填“大于”或“小于”生成物的总能量．
下列每组中各物质内既有离子键又有共价键的一组是
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. Ms.Trumpismyhistoryteacher.Shelovesasubjectthatsheteachesandhasacompletelyknowledgeofittoo.Historycomesaliveinhisclasswherenoonetalksaboutsomethingbutthetopic.Shelikestoteachbytellingstorieswhatalwaysmakesherlessonssointerestingbuteasytounderstand.Ms.Trumpalsohasagoodknowledgeofothersubjectandoftenlinksittowhatsheteachesabout.Thebestpartaboutheristhatshe'salwaysnicetothosestudentswhoneedsmoretimetograspthesubjectencouragingthemaskquestionssothattheycanunderstandthesubjectbetter.
100mL浓度为2mol•L﹣1的盐酸跟过量的锌片反应为加快反应速率又基本不影响生成氢气的总量可采用的方法是
HowtoManageYourPhone'sDataUse Smartphonesgiveyouaccesstoawealthofinformationandmediabutmostnetworksputalimitontheamountofdatayoucanuseeachmonth.Atypicalphonecontractincludesadataallowanceofbetween500MBand10GBpermonth.1Youseeyourusagecanmountupsurprisinglyquickly﹣watchingafilmonthephoneisabout700MBinSDanhourofstreamingTVisaround500MBor60﹣140MBforthesameofradiochattingonSkypeforanhourisaround40MB.2 •IfpossiblewaituntilyoucanconnecttofreeWi﹣Fibeforeusingyourphone'sdatafeatures. •Whenyouareontheroaduseyourcar'sGPSnotyourphonetofindtheway.3ButmapsarepreloadedinaGPSmakingthisfreetouse. •4Manyofthesearefundedbyadsthatpopuponyourscreen.Everyadhastodownloadthroughyournetworkusingupyourdataallowance. •Ifyouregularlyneedtousealotofdataonyourphoneconsideradata﹣compressing压缩appsuchasOnavowww.onavo.com.5Soyouuselessofyourmonthlyallowance.Youmayhavetosubscribetosuchcompressionservicessoyou'llneedtoweighupwhetherit'sworththecost. A.Themoredatathehigherthemonthlycost. B.RemembertousefreeWi﹣Fianywhereyougo. C.Trythesetipstobettermanageyourdatause. D.Itcompressesdatabeforeitisfedtoyourphone. E.Butyoumightenduppayingmorethanexpected. F.Thephonehastodownloadmapdataasyoumove. G.Becarefulofhowmanyfreegamesyouplayonthephone.
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