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倾斜角为且在x轴上的截距为a的直线被圆（x+a）2+y2＝4所截得的弦长为2，则a＝ ．
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高二上学期数学《》真题及答案
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已知直线的倾斜角为45°在y轴上的截距为2则此直线方程为
y=x+2
y=x﹣2
y=﹣x+2
y=﹣x﹣2
已知直线lx+ay+2=0的倾斜角为则直线l在y轴上的截距为
﹣2
2
﹣
在x轴上的截距为2且倾斜角为135°的直线方程为
ｙ＝－ｘ＋２
ｙ＝－ｘ－２
ｙ＝ｘ＋２
ｙ＝ｘ－２
已知直线的倾斜角为45°在y轴上的截距为2则此直线方程为
y=-x-2
y=x-2
y=-x+2
y=x+2
直线x+y+1=0的倾斜角与在y轴上的截距分别是
135°，1
45°，－1
45°，1
135°，－1
当m为何值时直线2m2＋m－3x＋m2－my＝4m－1.1倾斜角为2在x轴上的截距为1.
求倾斜角是直线y=-x+1倾斜角的且分别满足下列条件的直线方程1经过点-12在y轴上的截距是-5.
已知直线y＝－x＋5的倾斜角是直线l的倾斜角的大小的5倍分别求满足下列条件的直线l的方程.1过点P.
若直线l经过点A.12且在x轴上的截距的取值范围是-13则倾斜角的取值范围是.
直线ly－1＝kx＋2的倾斜角为135°则直线l在y轴上的截距是
1
－1
－2
过原点且倾斜角为60°的直线被圆x2+y2-4y=0所截的弦长为__________
已知直线l的纵截距为-1倾斜角是直线l13x+4y-1=0的倾斜角的一半求直线l的方程.
分别求满足下列条件的直线方程.倾斜角为60°且在y轴上的截距为－3.
2011～2012·北京朝阳一模过原点且倾斜角为60°的直线被圆x2＋y2－4x＝0所截得的弦长为_
已知直线的倾斜角为45°在y轴上的截距为2则此直线方程为
y＝﹣x﹣2
y＝x﹣2
y＝x+2
y＝﹣x﹣2
已知直线l过点10且倾斜角为直线l0x－2y－2＝0的倾斜角的2倍则直线l的方程为
4x－3y－3＝0
3x－4y－3＝0
3x－4y－4＝0
4x－3y－4＝0
已知直线l经过点A.12且倾斜角是直线y=2x+3的倾斜角的2倍那么直线l的方程为.
已知直线的倾斜角是60°在y轴上的截距是5则该直线的方程为________.
直线mx＋ny＋3＝0在y轴上截距为－3而且它的倾斜角是直线x－y＝3倾斜角的2倍则
m＝－，n＝1
m＝－，n＝－3
m＝，n＝－3
m＝，n＝1
直线Ax＋By－1＝0在y轴上的截距是－1而且它的倾斜角是直线x－y＝3的倾斜角的2倍求A.B.的值
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TheancientChinesedividedthesun'sannualcircularmovementinto24parts．Eachpartwascalled1specificSolarTerm节气．ThecriteriafortheformationofofTwenty﹣fourSolarTermsweredevelopedthroughtheobservationofchangesofseasonsastronomyandothernatural2phenomenoninthisregionandhavebeenprogressivelyappliednationwide． It3startfromtheBeginningofSpringandendswiththeGreaterCold4moveincycles．Thetheoryspreadsfromgenerationtogenerationandis5traditionalusedtodirectproductionanddailyroutines．Itinparticularremains6importancetofarmersforguidingtheirpractices7isusedwidelybycommunitiesandsharedbymanyracialgroupsinChina．SomefestivalsinChinaarecloselyassociated8thesolarterm．Itmayalsobereferencedinchildren'ssongsfolksongsandoldsayingsThesevariousfunctionsofthesolartermhavestrengthened9itpositionasaformofintangibleculturalheritage非物质文化遗产andhavemadeagreat10contributetothecommunity'sculturalidentity．
Asafive﹣year﹣oldIdidn'tknowhowpoorwewere．We'djustmovedtoManhattanand1nobodythere．Myfathercouldn'tbehomethatChristmasEve．MymotherandIworkedallafternoonmakingtreedecorations．WeweregoingtogettheChristmastreeintheeveningwhentheir2usuallydropped．AftersunsetwewalkedtoaparkinglotwhereChristmastreeswere3． Howmuchisyourcheapesttreemymotheraskedasalesman． Thirtydollars． HersmiledisappearedNothingfor4'' Ijustworkhere．Ihaveno5tochangetheprice． 6themanpointedatapileofbranchesinthecomerofthelot．7thatpileofcuttingsBehinditisatreethatwecan'tsell．Youcanhaveitforfree．Wethankedhimrepeatedlybeforehurryingtothe8ofthepileanddiscoveredasmalltreewithfewbranches． Mymother9Canwetakesomeofthesebranches Takeitallifyoulike． Wepulledthetreeandsomebrancheshomeand10theminthelivingroom．Icouldn'timaginehowwecouldhangmanydecorationsonthealmost11tree．Gotosleepnow．Santawill12thetreeforus．mymothersaid． Iwokeatdawnandrushedintothelivingroom．Tomy13thetreehadfilledout．Andithadabeautiful14shape．Thedecorationsshoneinthemorninglight．Outof15Iexaminedthetreeclosely．Mymotherhadusedwiresfromclotheshangerstofix16branchestoitstrunk．She'd17trimmed修剪itwithscissorstogetitsperfectshape． Weekslatermyfather18．WhenItoldhimaboutthe19helookedatitandtearsfilledhiseyes．SincethenI'vespentmanywonderfulholidaysbutthatChristmasremainsmy20． 1A．met B．knew C．recognized D．remembered 2A．sales B．orders C．demands D．prices 3A．sold B．cut C．planted D．designed 4A．more B．better C．less D．worse 5A．duty B．reason C．interest D．right 6A．Strangely B．Suddenly C．Unfortunately D．Willingly 7A．Want B．Forget C．See D．Understand 8A．back B．top C．front D．bottom 9A．heldout B．brokeout C．tookout D．calledout 10A．placed B．hid C．combined D．threw 11A．leafless B．priceless C．branchless D．meaningless 12A．protect B．decorate C．explore D．preserve 13A．surprise B．credit C．despair D．pride 14A．legal B．formal C．similar D．natural 15A．concern B．curiosity C．necessity D．expectation 16A．rotten B．donated C．abandoned D．damaged 17A．carefully B．stubbornly C．randomly D．unwillingly 18A．gotdown B．succeeded C．returned D．cameover 19A．branch B．tree C．festival D．salesman 20A．secret B．pain C．regret D．favorite
Attentioneveryone!MissDalrymplelookedatherclassoften﹣year﹣olds．TodaywearegoingtocreateaspecialcardforFather'sDaywhichfallsonthisweekend．Thenshebusiedherselfhandingoutthepaperandartmaterialstohernoisypupils． Theywereamixedpunch．Somecamefromtherichsideofthetownbutthemajoritieswerefromparentswhostruggledtogetjobs．Soshehadnotbeeneagertocarryoutthisactivity． Thinkaboutallthethingsthatyourdaddoesthatmakehimspecialshesaidloudlyassheapproachedthelasttable．Youcanwriteapoemorshortstorythinkingofthepositivecharacteristicsthatmakeyourdadspecial．Thewrittenpartofthisactivityshouldbecompletedbeforeyoustarttodecorateyourcard． Andrewlookedattheblankpage．HehadnevermetspokentoorbeenhuggedbyhisdadsohowcouldhewriteabouthimOncewhenhewaslookinginhisgrandma'sphotoboxhehadseenanoldblackandwhitephotobutitwasbadlycreased弄皱anddifficulttorecognizeanyclearfeatures．Shehadquicklytakenitfromhimandburieditdeeplyamongtherestnevertobefoundagain．Afterthinkingforawhilehewrote DearDad YouareapersonIdonotknowandwouldprobablynotrecognizeasIonlysawanoldphotoofyoualongtimeago．IthinkandwonderaboutyouoftenespeciallywhenIhavenoonetotalktoabouttheSaturdayfixtures体育活动．OnedaywhenIgrowupIwilldoanInternetsearchtofindyoubutIamnotsurewhetherIwillbesuccessfulasseveralattemptsbytheChildSupportAgencyhavenotbeensuccessful．HappyFather'sDayDad． Love Andrew 1WhatdidMissDalrympleaskherstudentstodo A．Handoutthepaperandartmaterials． B．Makeaspecialcardfortheirfathers． C．MakeacelebrationplanforFather'sDay． D．Carryoutaschoolactivityontheweekend． 2WhatdoestheunderlinedsentenceinParagraph2indicate A．Thestudentswerenotwillingtofinishthetask． B．Thestudentswereeagertocarryouttheactivity． C．Thestudentsdidn'tgetalongwellwitheachother． D．Thestudents'familyconditionswerequitedifferent． 3WhydidAndrewhavedifficultyinmakingaspecialcardforhisfather A．Becausehehadneverseenhisfather． B．Becausehisfatherwasnotasuccessfulman． C．Becauseheforgotallthethingshisfatherdid． D．Becauseheandhisgrandmadidn'tlikehisfather． 4WhatcanwelearnfromAndrew'sletter A．Andrew'sfatherhasbeendead． B．Andrew'sfathercan'trecognizehim． C．Andrewiseagertomeethisfather． D．Andrewissureoffindinghisfather．
Toforgiveisavirtuebutnoonehaseversaiditiseasy．Whensomeonehasdeeplyhurtyouitcanbeextremelydifficulttoletgoofyourhate．1．Anditcanbesurprisinglybeneficialtoyourphysicalandmentalhealth．Peoplewhoforgiveshowlesssadnessangerandstressandmorehopefulnessaccordingtoarecentresearch． HowshouldyoustarttoforgiveTrythefollowingsteps Calmyourself．2．Youcantakeacoupleofbreathsandthinkofsomethingthatgivesyoupleasureabeautifulsceneinnatureorsomeoneyoulove． Don'twaitforanapology．3．Theymayhavewantedtohurtyouortheyjustdon'tseethingsthesameway．Ifyouwaitforpeopletoapologizeyoucouldbewaitinganawfullylongtime．Keepinmindthatforgivenessdoesnotnecessarilymeanbecomingfriendsagainwiththepersonwhoupsetyou． Takethecontrolawayfromyouroffender冒犯者．Rethinkingaboutyourhurtgivespowertothepersonwhocausedyourpain．Insteadoffocusingonyourwoundedfeelingslearntolookforthelovebeautyandkindnessaroundyou． 4．Ifyouunderstandyouroffenderyoumayrealizethatheorshewasactingoutofunawarenessfearandevenlove．Youmaywanttowritealettertoyourselffromyouroffender'spointofview． Don'tforgettoforgiveyourself．5．Butitcanrobyouofyourself﹣confidenceifyoudon'tdoit． A．Whyshouldyouforgive B．Howeverforgivenessispossible C．Recognizethebenefitsofforgiveness D．Trytoseethingsfromyouroffender'sangle E．Forsomepeopleforgivingthemselvesisthebiggestchallenge F．Tomakeyourangerdieawaytryasimplestress﹣managementtechnique G．Manytimesthepersonwhohurtyoudoesnotintendtoapologize
H2R为二元弱酸向一定体积的0.1mol/L的H2R溶液中逐滴加入一定浓度的NaOH溶液溶液中不同形态的粒子H2RHR﹣R2﹣的物质的量分数aX随pH的变化曲线如图所示[aX＝]．下列说法错误的是
假设你是红星中学高三学生李华．北京冬奥组委会正在招募志愿者其职责为接待各国运动员及宣传中国文化组委会要求志愿者能够熟练运用英语请你用英文写一封申请信． 内容包括1．申请原因 2．你的优势 3．相关经历 注意1．词数不少于50 2．开头结尾已给出不计入总词数 DearSir/Madame IhavelearnedthatvolunteersforBeijingWinterOlympicGamesareneeded． Yourssincerely LiHua
短周期主族元素RXYZ的原子序数依次增大化合物MN均由这四种元素组成且M的相对分子质量比N小16．分别向M和N中加入烧碱溶液并加热二者均可产生能使湿润的红色石蕊试纸变蓝的气体．将M溶液和N溶液混合后产生的气体通入品红溶液中溶液变无色加热该无色溶液无色溶液又恢复红色．下列说法错误的是
ⅣA族元素cSiGeSnPb及其化合物在材料等方面有重要用途．回答下列问题 1Pb的价层电子排布图为 2CeC14的中心原子的价层电子对数为分子的立体构型为．GeCl4可水解生成一种氧化物和一种无氧酸其化学反应方程式为 3四卤化硅SiX4的沸点和二卤化铅PbX2的熔点如下图所示． ①SiX4的沸点依FClBrI次序升高的原因是． ②结合SiX4的沸点和PbX2的熔点的变化规律可推断依FClBrI次序PbX2中化学键的离子性填“增强”“不变”或“减弱”下同共价性． 4碳的另一种单质C60可以与钾形成低温超导化合物晶胞结构如下图所示． 此化合物可看成是K填充在C60形成的所有四面体间隙和八面体间隙之中其四面体间隙数目为．另有一种碱金属x相对原子质量为M与C60可形成类似化合物但X只填充C60形成的八面体间隙的一半此化合物的化学式为其晶胞参数为1.4nm晶体密度为g•cm﹣3用含M和阿伏伽德罗常数的值NA的式子表示
Bullying霸凌cantakeavarietyofformsfromtheverbaltothephysicalaswellasindirectformssuchasbeingexcludedfromsocialgroups．Bullyingisclearlyunpleasantandcanmakethechildexperiencingitfeelunworthyanddepressed．Inextremecasesitcanevenleadtosuicidethoughthisisthankfullyrare． Untilrecentlynotmuchwasknownaboutthetopicandlittlehelpwasavailabletoteacherstodealwithbullying．Perhapsasaconsequenceschoolswouldoftendenytheproblem．Thereisnobullyingatthisschoolhasbeenacommonanswerifaskedalmostcertainlyuntrue．FortunatelymoreschoolsarenowsayingThereisnotmuchbullyingherebutwhenitoccurswehaveaclearpolicyfordealingwithit．Threefactorsareinvolvedinthischange．Firstisanawarenessoftheseverityoftheproblem．SecondanumberofresourcestohelptacklebullyinghavebecomeavailableinBritain．ForexampletheScottishCouncilforResearchinEducationproducedapackageofmaterialsActionAgainstBullyingcirculatedtoallschoolsinEnglandandWalesaswellasinScotland．InIrelandGuidelinesonCounteringBullyingBehaviourinPost﹣PrimarySchoolswaspublishedtoo．Thirdthereisevidencethatthesematerialsworkandthatschoolscanachievesomething． Evidencesuggeststhatakeystepistodevelopapolicyonbullyingsayingclearlywhatbullyingmeansandgivingexplicitguidelinesonwhatwillbedoneifitoccurswhatrecordswillbekeptwhowillbeinformedandwhatpunishmentswillbeemployed．Thepolicyshouldbedevelopedthroughconsultationoveraperiodoftime．Pupilsparentsandstaffshouldfeeltheyhavebeeninvolvedinthepolicy．Otheractionscanbetakentobackupthepolicy．Therearewaysofdealingwiththetopicthroughthecurriculumusingvideodramaandliterature．Butcurriculumworkalonemayonlyhaveshort﹣termeffectsitshouldbeanadditiontopolicywork．Therearealsowaysofworkingwithindividualpupilsorinsmallgroups．Workintheplaygroundisimportanttoo．Onehelpfulstepistotrainlunchtimesupervisorstodistinguishbullyingfromplayfulfightingandhelpthembreakupconflicts．Anotherpossibilityistoimprovetheplaygroundenvironmentsothatpupilsarelesslikelytobeledintobullyingfromboredomorfrustration． Withthesedevelopmentsschoolscanexpectthatatleastthemostseriouskindsofbullyingcanlargelybeprevented．Themoreeffortisputinandthewiderthewholeschoolisinvolvedthemoresubstantialtheresultsarelikelytobe．Thereductioninbullyingandtheconsequentimprovementinpupilhappinessissurelyaworthwhileobjective． 1ThewriterthinksthattheresponseThereisnobullyingatthisschoolshows． A．bullyingcanbeeasilydealtwith B．bullyingdoesn‟texistintheschool C．theschoolknowsnothingaboutbullying D．theschoollackstheknowledgeandresourcesaboutbullying 2Fromparagraph2wecanlearnthat． A．reasonsfortheincreasedrateofbullyingareclear B．inthepreviousyearsBritishgovernmentpolicyfailed C．developmentsindealingwithbullyinghaveledtoasolution D．thereisnoresearchintohowcommonbullyingisinBritishschools 3Accordingtothepassagewhatisthemostimportantpartofreducingbullying A．Developapolicythroughconsultation． B．Dealwiththetopicthroughthecurriculum． C．Workwithindividualpupilsorinsmallgroups． D．Givedetailedguidelinesontherightthingstodo． 4Whichofthefollowingisthemostsuitabletitleforthepassage A．Bullyingwhatparentscando B．Bullyingaretheschoolstoblame C．Bullyingthelinkwithacademicfailure D．Bullyingfromnowayouttoprevention
Arecentexperimentprovesthatbeescansavetimeandenergywhentheyflyaroundtodifferentflowers． DrNigelRainefromtheRoyalHollowayUniversityofLondonhasalwaysbeeninterestedinfindingoutwhyanimalbehaveliketheydo．Heisalsointerestedinbees．ItwasnotasurprisewhenheandsomeotherscientistsfromQueenMaryUniversityofLondondiscoveredthatbeescanquicklysolveaproblemthattakescomputersmanydays． Flowersmakepollen花粉andwhenbeesvisitthemtheycarrythepollentootherflowers．Theplantsneedthepollentomakeseedsthatwillgrow．DrRainenotesthatwegetalotofourfoodfromplantssoitisimportanttoknowhowthebeesmovearoundandtakethepollenbetweenflowers．Thescientistswantedtoexaminethejourneythatthebeestakeandhowtheysaveenergywhentheydothis．TheycompletedtheexperimentontheroofofQueenMaryUniversityusingartificialflowersandalargeamountofnectarasweetliquidproducedbyflowers．Theytaughtonebeetovisitalltheflowersinoneplaceatthesametime．Whenthebeegottoknowthelocationoftheflowerswelltheysawhowitflewaroundandreturnedhomewiththenectar．Afterthistheychangedthelocationsoftheflowers．Thescientiststhoughtthebeewouldfollowtherouteitknewalready．Thiswouldmeanthatitfollowedalongerroutethanitneededtoandsoitwouldusemoreenergy．Theywatchedthebeecarefullyasittravelledbetweentheflowersintheirnewlocationandtheymadenotes．Butintheexperimentthebeechangeditsrouteandflewashorterdistance． Theproblemthatthebeesolvedissimilartoamathspuzzlecalledthe‘travellingsalesmanproblem'．Asalesmanwhogoestodifferentplacestosellthingswantstotraveltheshortestdistance．Buthehastocalculatethelengthofmanypossibleroutestoknowwhichoneistheshortest．Acomputercancalculatethisbuttheexperimentshowsbeescandothesamecalculationquicklywithatinybrain．Scientistsareveryinterestedinhowtheydothis．Itwouldhelpustounderstandhowpollenismovedaround．Inadditioniftheyfindthisoutitcouldhelpustoimprovecommunicationnetworks．Thismighthelphumanstoreducetrafficjamswhenthereisanaccidentforexample． 1Theunderlinedwordnectarinthethirdparagraphmeans． A．powder B．honey C．vitamin D．water 2Theresearcher'sexperimentfound． A．beescouldmanagetoavoidaccidents B．beesshowedsignsofbeingveryintelligent C．beescouldtakethesameroutetheyknewbefore D．beeswerefasteratcalculatingdistancethancomputers 3Accordingtothelastparagraphthenextstepofthestudyistodiscoverhow． A．pollenismovedaround B．trafficjamscanbereduced C．beescancalculatesoquickly D．communicationnetworksareimproved 4Wheredoesthispassageprobablycomefrom A．Anovel． B．Awebsite． C．Asciencemagazine． D．Anadvertisement．
TheTrueStoryofaYoungMan WhenReginaldLindsayreceivedascholarshiptoMorehouseCollegeinAtlantaGeorgiain1967whathewantedmostwasnotajobwithagoodsalarybutachancetobeamemberofCongressasasouthernrepresentative．AfterearninghisdegreeatHarvardLawSchoolin1970hereturnedtotheSouthtopracticelawamongthepoor．Iwanttohelpthemunderstandwhattheirrightsareandtohelpthemachievethemhesaid．ThenheranforpoliticalofficeatthelocalandstateleveluntilhewasreadytotryforCongress． Reggrewupinalow﹣incomeNegrosectionofBirminghamAlabama．BroughtupbyhisgrandparentsafterhisparentsweredivorcedwhilehewasveryyoungReghadbeenlivingthroughaperiodoffar﹣reachingprogressinracerelations．Inthesummerof1968ReghimselfbecameagoodexampleofthisprogresswhenhebecamethefirstNegrostudentappointedtoaspecialnewprogram．TheprogramintroducedbrightyoungstudentstotheworkingsoftheGeorgiaStategovernmentandencouragedthemtoseekemploymentthereafterfinishingtheireducation．I'vebeenluckyhesaid．Iseemtohavebeenintherightplaceattherighttime． ButluckwasonlypartofReg'sstoryforhemadethemostofopportunitiesthatcamehisway．Helearnedtoreadinkindergartenandbeganvisitingthepubliclibraryregularlytoborrowbooks．Hisgrandparentsencouragedhimthoughneitherofthemhadmucheducationandtheyboughthimasetofencyclopedias．Ilovedthosebooksheremembered．Iusedtocomedownstairsbeforebreakfastandreadshortarticles．IenjoyedreadingaboutfamousmenandthenIwouldpretendtobeoneofthem．Iguessitwaspartlyachildishgameandpartlyanescape．Itwasn'ttoomuchfuntobeaNegrowhenIwasakid．Whilestudyingforhisbachelor'sdegreeatMorehouseCollegeRegworkedonseveralpoliticalcampaignshelpingcandidatesgetelectedtogovernmentoffices．AtthesametimehemaintainedaBaveragewhilemajoringinpoliticalscience． WithjusttwomoreyearstocompleteatHarvardLawSchoolwhichalsogavehimascholarshipRegmadeagoodstartonhisprofessionalcareer．HesaidThegoodlifeformeisthekindoflifewhereIcanfindsatisfactioninpublicservice．Thenin1975hewastheMassachusettsstatecommissionerofpublicutilitiesandfrom1993to2009hewasjudgeoftheUnitedStatesDistrictCourtfortheDistrictofMassachusetts． 1AfterearninghisdegreefromHarvardLawSchoolReginaldplannedto． A．returntohishometowntofindajobwithagoodsalary B．gobacktotheSouthtohelpthepoorunderstandtheirrights C．runforlocalofficetomakeprogressonthecivilrightsmovement D．tryforCongressbyencouragingthepoortojoinaneducationprogram 2InwhatwaydidReginald'sgrandparentsencouragehimtoread A．Theysenthimtokindergarten． B．Theyledhimtopubliclibrary． C．Theyboughthimencyclopedias． D．Theyborrowedmanybooksforhim． 3WhichofthefollowingwordscanbestdescribeReginald A．Enthusiasticandcareful． B．Cooperativeandmodest． C．Ambitiousandhardworking． D．Courageousandgenerous．
碳九芳烃是一种混合物异丙苯就是其中的一种．工业上可用异丙苯氧化法生产苯酚和丙酮其反应和工艺流程示意图如下．下列有关说法正确的是
TheresearchersfromtheUniversityofLiverpoolhavenowspottedsmokeringsintheoceanwhichhavethepowertosuckinthesmallmarinecreaturesandhavethepotentialtocarrythemathighspeedforalongdistance． Intheoceanthevasteddies旋涡spanuptohundredsofkilometersacrossandareacommoneventrelatively．Butnowtotheresearchers'surprisethesegianteddieswhichwerenamedsmokeringslaterwerespottedspinning旋转inoppositedirectionstravellinguptotentimesthespeedofthenormaleddies．Thesmokeringsarecutinhalfbytheseasurfaceduetowhichtheresearcherscouldseethetwoendsofthehalfringontheseasurface． DescribedinaresearchpaperpublishedinthejournalGeophysicalResearchLettersthesmokeringswerediscoveredbyanalyzingsealevelmeasurementstogetherwithseasurfacetemperatureimagesfromthesametimeandplacetakenfromsatellites． WhatwefoundwasapairofeddiesspinninginoppositedirectionsandlinkedtoeachothersothattheytraveledtogetherallthewayacrosstheTasmanSeatakingsixmonthstodoit''sharedChrisHughesleadauthorofthestudypublishedinthejournalGeophysicalResearchLetters．Thesmokeringsrequireanareaofcalmwatertoexpandwhichitselfisquiteunusual．IhavelookedatotherareasofotheroceansbutIhaveonlyseenthemintheoceansaroundAustraliaplusoneintheSouthAtlanticheadded． Thesmokeringsrequireacalmwaterareatoformwhichisquiteuniqueinitself．Theteamsaidthattherearestillalotofthingsthattheyneedtounderstandabouthowtheselinkededdiesturnintoone．Theyguessthattheseeddiesmightjoinupwhentwosmokeringshiteachotherintheocean． 1Whathasmadetheresearchersamazed A．Thevasteddiescanspanuptohundredsofkilometers． B．Thegianteddiesspininoppositedirections． C．Thesmokeringscomeintobeingontheseasurface． D．Thesmokeringshavekilledsomanymarinecreatures． 2Howdidtheresearchersfindthesmokerings A．Bytakingacloselookattheseasurface． B．Byobservingthephenomenainthesky． C．Byanalyzingthedatafromthesatellites． D．Bymeasuringthesealevelmovements． 3WhatdoesChrisHughes'wordsimplyinthetext A．TheTasinanSeaistooroughtocreatesmokerings． B．Thebirthofsmokeringsneedsauniquesetting． C．Nooneactuallyknowswheretheeddiesform． D．SmokeringsappearacrosstheSouthAtlantic． 4Whatisthebesttitleforthetext A．Smokeringsthreateningmarinecreatures． B．OceansnearAustraliainfluencedbysmokerings． C．Theformationofsmokerings． D．Smokeringsdiscoveredintheocean．
Self﹣confidencemotivation动机supportandknowledgearethemainfactorsdeterminingifonesucceedsorfails．Eachofthesefactorsinfluencesourchancesofsuccessinadifferentway．1． Lackofself﹣confidenceisprobablythemostdreadfulenemyofsuccess．2Eventhemostcapablepersonissuretofailwithsuchanattitude．Ifitisyourcasetooimprovingyourself﹣confidenceisamust． Motivationisequallyasimportantasself﹣confidence．3Youmayevennottrytoachievethegoalthatliesbeforeyou．Itisimportanttofindoutwhatisthebestmotivationforyou．Ifyouhavetodosomethingthatdoesnotmotivateyoujusttreatyourselfwitharewardafteryousucceed．Ofcoursethisrewardshouldconsistofsomethingthatwillmotivateyoutopursue追求asuccess． 4Whileitisnotamustforsucceedinginyourgoalsalackofsupportcanoftenleadtofailure．Itisalsotruethatsomepeoplecannotsucceedwithoutapropersupportfromtheirsurroundings．Thesepeopleoftenlosetheirmotivationorworsetheirself﹣confidence．Ifyouknowsuchapersonsupportinghimorherisarightthingtodo．Alsosurroundyourselfwiththerightpeople．Youwillseetheresultssoon． Pursuingrealisticgoalsisalsoimportantforasuccess．Youshouldalwaysmakesurethatyourgoalsareachievable．5Unrealisticgoalsusuallyleadtoafastfailureandalsomakemanypeopleembarrassed． A．Asweknowmanypeopletrybutdonotsucceed． B．Considerallyourknowledgeandskillswhensettingupagoal． C．Motivationissomethinginyourselfthatcanpushyouforwards． D．Thereareseveralmainreasonswhysomepeoplecannotsucceed． E．Supportivefamilyandcollectiveworkplacearealsoveryimportant． F．Withoutityouwillnotpushyourselftowardsabetterperformance． G．Thinkingyouarenotgoodenoughtoachieveyourgoalsisthesameasdecidingthatyouwillnotsucceed．
DidTheEarthMoveForYou Eleven﹣year﹣oldAngelasufferedfromadiseaseinvolvinghernervoussystem．Shewasunableto1andhermovementwasrestrictedinotherwaysaswell．Thedoctorsdidnotholdoutmuch2ofhereverrecoveringfromthisillness．They3she'dspendtherestofherlifeinawheelchair．Theysaidthat4ifanywereabletocomebacktonormalaftercatchingthisdisease．Butthelittlegirlwasbraveandconfident．Therelyinginherhospitalbedshewould5toanyonewho'dlistenthatshewasdefinitelygoingtobewalkingagainsomeday． ShewasthensenttoaspecializedrehabilitationhospitalintheSanFranciscoBayarea．Whatevertherapies治疗方法couldbe6tohercasewereused．Thingsdidn'tworkasthetherapistsexpected．Stilltheywerecharmedbyher7spirit．Theytaughtherabout8aboutseeingherselfwalking．Ifitwoulddonothingelseitwould9giveherhopeandsomething10todointhelongwakinghoursinherbed．Angelawouldworkashardaspossibleinphysicaltherapyinwhirlpoolsandinexercisesessions．Andsheworkedjustashardlyingthere11doingherimagingvisualizingherselfmovingmovingmoving! Onedayasshewastwistingwithallher12toimagineherlegsmovingagainitseemedasthougha13thinghappenedThebedmoved!Itbegantomovearoundtheroom!She14outLookwhatI'mdoing!Look!Look!I15it!Imoved! Ofcourseatthisverymomenteveryoneelseinthehospitalwasscreamingtooandrunningfor16．Peoplewerescreamingequipmentwas17andglasswasbreaking．YouseeitwastherecentSanFranciscoearthquake．Butdon'ttellthattoAngela．She's18thatshedidit．Andnowonlyafewyearslatershe‟sbackinschool． 19herowntwolegs．Nocrutches拐杖nowheelchair．YouseeanyonewhocanshaketheearthbetweenSanFranciscoandOaklandcanconqueralittledisease．Youneverknowwhat‟saroundthecorneruntilyoutakea20step． 1A．hear B．speak C．walk D．see 2A．pride B．hope C．regret D．pity 3A．predicted B．forgot C．denied D．promised 4A．some B．few C．many D．all 5A．apologize B．appeal C．refer D．swear 6A．applied B．appointed C．compared D．explained 7A．competitive B．independent C．sensitive D．undefeatable 8A．concentrating B．summarizing C．picturing D．sorting 9A．inadvance B．forsomereason C．onthecontrary D．atleast 10A．positive B．attractive C．familiar D．boring 11A．gratefully B．faithfully C．hopelessly D．royally 12A．might B．interest C．fame D．need 13A．normal B．magical C．funny D．simple 14A．found B．screamed C．turned D．counted 15A．understood B．refused C．made D．decided 16A．cover B．comfort C．freedom D．office 17A．exploding B．working C．self﹣repairing D．falling 18A．persuaded B．ashamed C．convinced D．worried 19A．By B．With C．On D．For 20A．cautious B．reasonable C．final D．further
我国明代本草纲目中收载药物1892种其中“烧酒”条目下写道“自元时始创其法用浓酒和糟入甑指蒸锅蒸令气上用器承滴露．”下列物质的分离和提纯可采用文中提到的“法“的是
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． It'shardbeinganastronaut'sson．Imeaneverybodyexpectsyoutobespeciallyorperfect．ButI'msimpleanaveragestudentandI'maveragetoowhenitcomestoplaybasketballfootballandbaseball．Ioftenwonderhowmyfatherneverhasasonlikeme．He'ssooutstandingandhedoeswelleverything．Inhighschoolheiscaptainofthefootballteamandeditoroftheschoolnewspapers．WelltotellyouthetruthIdohaveatalentwhatnobodyknowsabout．Iwritepoemsandstoriesorkeeptheminarednotebookinitsbottomdeskdrawer．Idreamaboutbeingafamouswriter．
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