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甲、乙两地间的直线公路长为400千米．一辆轿车和一辆货车分别沿该公路从甲、乙两地以各自的速度匀速相向而行，货车比轿车早出发1小时，途中轿车出现了故障，停下维修，货车仍继续行驶．1小时后轿车故障被排除...
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甲乙两地之间的公路路程是804千米一辆货车和一辆轿车同时从两地出发相向而行途中货车停车修理了1.2
甲乙两地相距858千米一辆货车和一辆客车同时从两地相对开出．货车的速度是65千米/小时客车的速度是
甲乙两地相距840千米一辆货车和一辆客车分别从甲乙两地同时相向开出经过6小时相遇．客车每小时比货车快
甲乙两地相距120千米一辆客车和一辆货车分别同时从甲乙两地相对开出小时相遇已知客车每小时行80千米求
一辆汽车和一辆轿车分别从甲乙两地同时开出相向而行．汽车每小时行48千米轿车每小时行63千米它们2小时
一辆卡车和一辆货车分别从甲乙两地同时相对开出5小时相遇．客车每小时行80千米货车每小时行90千米．甲
甲乙两地相距300千米一辆货车和一辆轿车先后从甲地出发向乙地如图线段OA表示货车离甲地距离y千米与时
甲乙两地的公路长285千米一辆客车和一辆货车分别从甲乙两地同时出发相向而行经过3小时两车相遇已知客车
甲乙两地相距355千米一辆客车和一辆货车分别从甲城和乙城相对开出2.5小时相遇．已知货车每小时形式
一辆客车和一辆货车同时从甲乙两地相向而行2小时后在距中点21千米处相遇．已知货车和客车的速度比是5
甲乙两地相距540千米一辆货车与一辆客车同时从两地相对开出4小时后两车相遇货车与客车的速度比是78
甲乙两地相距380千米一辆轿车和一辆货车同时从甲乙两地相对开出．轿车每小时行51.5千米经过3小时后
一辆客车从甲地开往到乙地每小时行驶50千米一辆货车从乙地开往甲地每小时行驶40千米．两车同时出发然后
甲乙两地相距296千米一辆轿车和一辆客车分别从两地出发相向而行．轿车先行56千米后客车再出发．轿车
甲地到乙地的高速公路大约长440千米一辆轿车和一辆客车同时两地出发相向而行．轿车每小时行驶120千米
一辆轿车和一辆摩托车分别从甲乙两地相向而行两地相距500千米摩托车上午8点出发每小时行40千米轿车
AB两城相距108千米一辆轿车和一辆货车同时从AB两地相向开出．轿车每小时行75km0.8小时后两
一辆货车和一辆客车从甲乙两地相对开出货车每小时行46.8千米客车每小时行63.4千米4.8小时后相
一辆货车和轿车同时从A地前往B地已知货车与轿车速度之比为35轿车到达B地后立即返回在距离8地20千米
35
40
70
80
一辆客车和一辆货车同时从甲乙两地相对开出3小时后相遇．货车每小时行80km货车与客车的速度比是45甲
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数2的倒数是
无论他编造了多少借口他都得为因自己失误而造成的后果买单.nomatter.
Postingaphotoofthefoodyou'reabouttoeatonWeChathasbecomeadailyritual惯例;仪式formany.Oftenthisfoodinthephotoisn'tasappealingtothoselookingatitbutscientistsarenowclaimingtakingaphotoofyourfoodbeforeyoueatitmakesittastebetter. ResearchersatUniversityofMinnesota'sCarlsonSchoolofManagementclaimtakingaphotoputsyouinthemomentandindoingsoheightensyour41.Thepersontakingthephotowillonsomelevelfeelthemotivationtocontinuethepractice. Researcherswonderedaboutthepowerofritualsafternoticingthefunny42thatpeopleoftenperformbeforeeatinganddrinking.Theyconductedexperimentstoinvestigatewhetherthesekindsofhabitualbehaviourinfluencestaste. Inthefirstexperimentsomeparticipantswereaskedtoeatapieceofchocolatefollowingadetailedsetof43:‘Withoutunwrappingthechocolatebarbreakitinhalf.Unwraphalfofthebarandeatit.Thenunwraptheotherhalfandeatit.'Theotherparticipantswere44instructedtorelaxforashortamountoftimeandtheneatthechocolatebarhowevertheywanted. Theresultsshowedthatthosewhohadperformedtheritualratedthechocolatemore45enjoyeditmoreandwerewillingtopaymoreforthechocolatethantheothergroup. Asecondexperiment46thesefindingsshowingthat47movementsdon'tproduceamoreenjoyableeatingexperience.Thedataalso48thatalongerdelaybetweenritualandconsumptionenhancedtheseeffectsevenwithacommonfoodlikecarrots. Whiletheseritualsmayseeminsignificanttheresearchersnotethattheeffectstheyproducearequiteamazing.Andwhileritualsare49beforemealtimestheycouldplayaroleinother50too.
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.每处错误仅涉最一个单词的增加删除或修改.增加:把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.Inourlifeweoftenregretwhatwedidandwhichwecouldn'tdo.Actuallyitdoesn'tbenefitusatall.Asformostofuswemissedmanychancetoearnmoremoneytogetahighpositionandtorealizeourdreams.Weoftenregretthatwedon'tseizethoseopportunitiesthusfeelupset.AlthoughwedoknowregrettingthePastisnobenefitbutwestillcan'thelpdoingitToavoidtheproblembelowweneedtopaymoreattentiontowhatyouaredoingnowmakingusbusierandhavingnotimetorecallthepast.Moreoverwe'dbettersetreasonablygoalsonebyone.Onlybydoingsocanwestruggleforourfuturebetter.
正因为是他被任命为经理该公司在过去的十年中迅速发展为广告业巨头.It.
ThereweresomanynightswhenIasayoungboyhadtowatchhelplesslyasmyfatherverballyandphysicallyabusedmymother.Icanstillrecallthesmellofalcoholseethefearinmymother'seyesandfeelthehopelessmiserythatcomeswhenweseepeoplewelovehurtingeachotherinincomprehensibleways. Iwouldnotwishthatexperienceonanyoneespeciallynotachild.IfIsettledowninthosememoriesIcanfeelmyselfwantingtohurtmyfatherbackinthesamewayshehurtsmymotherandinwaysofwhichIwasincapableasasmallboy.Iseemymother'sfaceandIseethisgentlehumanbeingwhomIlovedsoverymuchandwhodidnothingtodeservethepainimposeduponher. WhenIrecallthisstoryIrealizehowdifficulttheprocessofforgivingtrulyis.IntellectuallyIknowmyfathercausedpainbecausehewasinpain.SpirituallyIknowmyfaithtellsmemyfatherdeservestobeforgivenasGodforgiveusall.Butitisstilldifficult.Thesufferingswehavewitnessedorexperiencedliveoninourmemories.Evenyearslatertheycancauseusfreshpaineachtimewerecallthem. AreyouhurtandsufferingIstheinjuryneworisitanoldunhealedwoundKnowthatwhatwasdonetoyouwaswrongunfairandundeserved.Youarerighttobeoutraged.Anditisperfectlynormaltowanttohurtbackwhenyouhavebeenhurt.Buthurtingbackrarelysatisfies.Wethinkitwillbutitdoesn't.IfIslapyouafteryouslapmeitdoesnotlessenthestingIfeelonmyownfacenordoesitweakenmysadnessastothefactyouhavestruckme.Revengegivesatbestonlymomentaryrelieffromouremotionalpain.Theonlywaytoexperiencehealingandpeaceistoforgive.Untilwecanforgiveweremainlockedinourpainandlockedoutofthepossibilityofexperiencinghealingandfreedom;lockedoutofthepossibilityofbeingatpeace. Withoutforgivenessweremaintiedtothepersonwhoharmedus.Weareboundwithchainsofbitternesstrapped.Untilwecanforgivethepersonwhoharmedusthatpersonwillholdthekeystoourhappiness;thatpersonwillbeourjailer监狱看守. Whenweforgivewetakebackcontrolofourownfateandourfeelings.Webecomeourownliberators.Forgivenessinotherwordsisthebestformofself﹣interest.Thisistruebothspirituallyandscientifically.Wedon'tforgivetohelptheotherperson.Wedon'tforgiveforothers.Weforgiveforourselves. 66.Whydidthewritermentionthestoryofhisfather'sabuseofhismom A.Becausehelovedhismomandwantedtofightbacksomeday. B.Becausehisfatherfinallyrealizedhisownmistakeandwasforgiven. C.Becausewitnessinghismom'ssufferingisstillhurtinghimandhasnowaytorelieve. D.Becausehefeltthathewasspirituallyrelievedfromthepainthroughforgiveness. 67.Thewriterwrotethearticleinordertotellpeoplethat. A.wemayneverhealourpainsorsufferingsintheheartunlesswelearntoforgive B.weshouldneverforgetthesufferingsburiedinourhearts C.wemaygettiedtothepersonwhoharmedusallthroughlife D.weshouldn'tworryaboutthepainswecausedsinceforgivingisalwayseasierthanimagined 68.Whatisthe4thparagraphmainlyabout A.Hurtingbackdoesnogoodtorelievingone'sownhurtsbutforgiving. B.Ifsomeoneslapsyouyoujustslapbackwhichwilllessenyourpain. C.Thesufferingswehavewitnessedorexperiencedwillliveoninourmemoriesforever. D.Afterbeinghurtifonewantstoexperiencehealingandfreedomheshouldforgetthehurt. 69.Whichofthefollowingstatementsistheclosestinmeaningtotheunderlinedsentence A.Inordertohelpothersweshouldstopforgivingandfightback. B.Thepurposeofourforgivingisnottohelpotherpeople. C.Ourforgivingisalsousefultohelpingothersthoughtheymayhavehurtus. D.Onlybyforgivingotherscanwehelpthemtobegoodpeople.
Jacklookedupandsawinthedistanceredandgreennavigationlightscomingtowardsthemandknewitmustbeanavalpatrol巡逻boatbecauseofitsspeed.Asthehummingoftheboat'spowerfulenginesdrewcloserJackbentdown. Jackthenletoutafrightenedcryasthebrilliantbeamofasearchlightbrokethedarknessandsweptthefishingboatfromheadtotail.ByitsreflectedlightJackcouldclearlyseethesimilarlooksonthefacesofotherbentones. Jackknewthatifthepatrolboatcamecloseenoughitsmenwouldsurelyseethepeoplehiddeninthefishingboat.TocollecthimselfheleanedhisheadalittlesothathecouldseeDerekstandingintheheadoftheboatholdingthetiller舵柄.Derekmanagedtowavebackatthepatrolboatasifhehadnotacareintheworld.Howimperturbablehewas! SomeoneonboardthepatrolboatswitchedonaloudspeakerandavoicemadeharshandthinbyitshorndemandedWhereareyoubound DerekshruggedandshoutedbackTellmewherethefishrunandI'lltellyouwhereIambound.Thenoiseofidlingenginesdrownedhisvoice. Sayagain!barkedthespeaker. Anywherewherethere'sfish!Derekshoutedback.Therewasapause.Theboatsdriftedclosertoeachother. Whyaren'tyoushowingnavigationlights JackwatchedasDerekpretendedtolookpuzzledandleantoutoverthesideasiftoseewhattheysaidweretrue.Theymusthaveblownoutheapologizedwithashrug.I'lllightthemagainassoonasyoustoprockingmeaboutlikethis. AboardthepatrolboatthecaptainwaswonderingifitwouldbeworthwhilesearchingthisoldfishingboatforstowawaysashowmanybreathingsoulscouldsuchashabbyboathideTheradiosuddenlycackled.Abruptlywithoutanotherwordbeingexchangedthelightwentoutandthepatrolboatstarteditsenginesspeedingoffintothedarkleavingthefishingboatfloatingaboutinthewater. 66.Jackletoutascaredcrybecausehe. A.sawsomethinginthesea B.wasafraidofbeingdiscovered C.wasblindedbythebrightlights D.wasscaredbythefacesofcompanions. 67.Thepatrolboatcaptaindidnotsearchthefishingboatashe. A.didn'tfinditworthwhile B.lookeddownupontheshabbyoldfishingboat C.trustedDerekverymuch. D.wascalledtoanotherplaceviatheradio 68.Theunderlinedwordimperturbableinthepassageisclosestinmeaningto. A.anxious B.nervous C.calm D.sociable 69.WhichofthefollowingstatementsisTRUEaccordingtothepassage A.Derekdidn'trealizethatJackandothershidinthefishingboat. B.ThecaptainwassuspiciousofwhatDerektoldhim. C.Thepatrolboatapproachedthefishingboattoinspectillegalgoods. D.DereksucceededincoveringupfortheJackandothersontheboat.
如图已知在△ABC中DEF分别是ABBCAC的中点连结DFEFBF． 1求证四边形BEFD是平行四边形 2若∠AFB＝90°AB＝6求四边形BEFD的周长．
Theorangutan红毛猩猩themostinactiveofthegreatapeshasunusuallystableDNAtoo.Researchershavejustcompletedthesequencing序列oftheentiregenome基因组ofourorange﹣hairedrelativeandtheyhavefoundtotheirsurprisethatitsDNAhaschangedmuchlessdramaticallyovertimethanhasthatofhumansorchimpanzees.TheorangutanisveryuniquesaysDevinLockeastructuralgeneticistheadingtheorangutansequencingproject.Theorangutangenomehadoneotherbigsurprise.LockeandcolleaguessequencedsixSumatranandfiveBorneanorangutanswhichareclassifiedasdifferentspecies.Theapeshavebeenphysicallyseparatedforatleast21000years﹣thelasttimelandbridgesbetweenthetwoislandsexisted﹣andearlierstudiesestimatedthattheybecamedistinctspeciesmorethan1millionyearsago.ButthenewanalysisreportedonlinetodayinNaturerewriteshistory:itappearstheypartedwaysjust400000yearsago.MostpreviousstudiesusedsmallsetsofmarkersandalimitedamountofDNAsequencesaysLocke.Thestatisticalpowerissomuchgreaterwhenyouhavethewholegenomeavailable.Theorangutannowjoinschimpanzeesandhumansasthethirdgreatapetohaveitsgenomesequenced.TheorangutangenomeisawonderfulresourcesaysevolutionarygeneticistSvantePääbooftheMaxPlanckInstituteforEvolutionaryAnthropologyinLeipzigGermany.ItwillhelpclarifyhoweachpartofhumanandAfricanapegenomesarerelatedtoeachotherandevolved.Suchinsightsarealreadycomingin.Orangutansoriginatedsome12millionto16millionyearsagogivingtheirgenomesmuchmoretimetoevolvethanthoseofhumansandchimpanzeeswhichsplitintotheirownlineages血统5millionto6millionyearsago.Butacomparisonofthethreegenomesshowsthathumansandchimpanzeesloseorgainnewgenesattwicetherateoforangutans.ThereasonmayhavetodowithstretchesofDNAcalledretrotransposons.Thesekeydriversofevolutionjumparoundthegenomecreatingnewgenesdamagingexistingonesoralteringgeneregulation.ThenewdatarevealthatcommonretrotransposonsknownasAluelementshavemovedaroundtheorangutangenomemuchlessthantheyhaveinthehumanandchimpanzeegenomes.Idon'twanttosaythat‘Aluretrotranspositionevents'areshutoffinorangutansbutthey'vebeencoveredupsaysLocke.Theresearchersalsodiscoveredthatovertimethestructureoforangutanchromosomes染色体haschangedlittlewhichmaybelinkedtotheAluelementfinding.Otherresearchershavesuggestedthatthestrongandhealthystructuralvariationinhumansandchimpsmayhavestimulatedincreasedintelligence.ButLockenotesthatorangutansarealsohighlyintelligent.Iforangutanshavehadverylittlestructuralvariationmaybethisdecouplesstructuralvariationfromintelligencehesays.AseparatebutrelatedstudypublishedtodayinGenomeResearchreportsyetanotherunexpectedfindingfromacomparisonofthethreegreatapegenomes.AteamledbyMikkelH.SchierupandThomasMailundofAarhusUniversityinDenmarkbothco﹣authorsoftheNaturereportdiscoveredthatsomeregionsofthehumangenomemorecloselyresembletheorangutanthanthechimpanzee.ThisreflectsthefactthatatthetimehumanssplitofffromacommonancestorwithchimpsbothspecieshadthesameancestralorangutanDNA.Buthumansandchimpanzeeshaveevolvedseparatelyformillionsofyears.IntheprocesschimpsformysteriousreasonslostsomeorangutanDNAthathumanskeptpossessionof.Moresurprisesaresuretocomeasresearcherscomparethegenomesofevenmoreapes.Projectstosequencetheothertwogreatapesgorillasandbonobosareunderway.74.OrangutansfromtwoislandsSumatranandBorneanbecamedifferentspeciessince.A.atleast21000yearsagoB.over1millionyearsagoC.some12millionto16millionyearsagoD.400000yearsago75.WhichofthefollowingstatementsisTRUEaccordingtothispassageA.ComparedwiththeDNAoforangutanchimpanzee'sislesschangedovertime.B.Onlythreeapes'genomeshavebeensequenceduptonow.C.Humans'ancestorssteppedontheirwayofevolution12to16millionsyearsago.D.Chimpanzeesgainnewgenesfasterthanorangutansdoinevolution.76.Thereasonoforangutan'slittlechangeinDNAisthat.A.thisspeciesisnotasactiveinintelligenceashumansorchimpanzees.B.thenewlyidentifiedAluelementsisbelievedtohaveplayedaspecialroleC.AluretrotranspositionsinorangutanareshutoffduringthecourseofevolutionD.orangutan'slowintelligencefailstostimulatethechangeofitsDNA77.Someregionofhumangenomeismoresimilartothatoforangutanthanchimp'sbecause.A.humanandorangutansharethesameancestorbutchimpdoesn'tB.humansandchimpanzeeshaveevolvedseparatelyformillionsofyearsC.chimpsfailedtohangontoorangutanDNAforsomeunknownreasonbuthumandidn'tD.chimpsdidn'tactasactivelyashumansresultingintheirlosingsomecriticalorangutanDNA.
Beingskinnyisnotbeautifulbutbeinghealthyis.Mostyoungpeopleunfortunately25convincethatbeingthinandthereforebeingstylishisamajorwayofmaintainingself﹣worth.Tomakethematterworsetheymighttakethissofarthattheyarelikelytoendup26eatingdisorders. Eatingdisordersarepsychologicalillnessesdefinedbyabnormaleatinghabits27mayinvolveeitherinsufficientortoomuchfoodintaketothedamageofanindividual'sphysicalandmentalhealth.Bulimianervosa暴食症andanorexianervosa食欲匮乏arethe28commonformsofeatingdisorders. 29diagnosedwithanorexianervosaarewellunderahealthybodyweight.Butpatientswithbulimianervosamayhaveabodyweightthatfallswithintherangefromnormaltooverweight.30primarilythoughtofasaffectingfemaleseatingdisordersinfluencemalesaswell. Theprecisecauseofeatingdisordersisnotentirelyunderstoodbut31isagreedthatthediseaseislinkedtoothermedicalconditionsandsituations.Besidesculturalidealizationofthinnessandyouthfulnessalsocontributesto32reduceweightforcefully.Theproblemhasaffectedalargepopulationworldwide.
Asyougetolderitfeelsliketimetendstomovefaster.AsDanArielyexplainsoveratTheWallStreetJournalwetendtofallintofamiliarroutines25weageandthatmakestimemovequickly. Weperceivetimeassomethinglikeastackofmemoriessothelessnewexperiencesyouhavethe26likelyyouaretofillinthosememorieswithinterestingthings. Timedoesgobyormoreaccuratelyitfeelsasiftimeisgoingbymorequicklytheolderweget. Inthefirstfewyearsofourlivesanythingwesenseordoisbrandnewandmanyofourexperiencesareuniquesotheyremainfirmlyinourmemories.Butas27yearsgobyweencounterfewerandfewernewexperiences﹣bothbecausewe28accomplishalotandbecauseweareslavestoourdailyroutines. Forexampletrytoremember29happenedtoyoueverydaylastweekchancesarethatnothingextraordinaryhappenedsoyouwillbehard﹣pressedtorecallthespecificthingsyoudidonMondayTuesdayetc. WhatcanwedoaboutthisMaybeweneedsomenewappthatwillencourageustotryoutnewexperiencespointoutthingswe'veneverdonerecommenddisheswe'venevertastedandsuggestplaceswe'veneverbeen.Suchanapp30makeourlivesmorevariedencourageustotrynewthingsslowdownthepassageoftimeandincreaseourhappiness. 31suchanapparrivestrytodoatleastonenewthingeveryweek.It'snottoodifficulttopush32todonewthings.
如图已知在平面直角坐标系xOy中直线y＝x﹣1分别交x轴y轴于点A和点B分别交反比例函数y1＝k＞0x＞0y2＝x＜0的图象于点C和点D过点C作CE⊥x轴于点E连结OCOD．若△COE的面积与△DOB的面积相等则k的值是．
语言运用需要足够的词汇量为基础.base.
Adropinthesun'sradiationcancausecoldwintersinpartsofNorthAmericaandEuropescientistssayafindingthatcouldimprovelong﹣rangeforecastsandhelpcountries41forstorms. Scientistshaveknownforalongtimethatthesunhasan11﹣yearcycleduringwhichradiationfromthesunreachesan42thenfalls.Butdetectingaclearlinkofthecycletotheweatherhasprovedmuch43. OurresearchnoticesalinkbetweensolaractivitiesandregionalwinterclimateleadauthorSarahInesonoftheUKMetOfficetoldthereportersinanemail. Herteamfocusedonthedatafromtherecentminimumsolarradiationperiodduring2008﹣10whichwasan44calmperiodforthesunbutatthesametime45wintersintheU.SandEuropewererecordedwhichbroughttroublestomanybusinessesandmadepeople'slivesdifficult. Theresearchersfoundthatareductioninradiationfromthesuncanaffectwindpatterns46coldwinters. Whileradiationlevelswon'ttelluswhattheday﹣to﹣dayweatherwillbetheyprovidetheexciting47ofimprovedpredictionforwinterconditionsformonthsandevenyearsahead.Thesepredictionsplayanimportantroleinlong﹣termweatherplanningInesonsaid. Ineson'steamusedthedatainacomplexcomputerto48long﹣termweatherpatterns.Itsuccessfullyreproducedwhatscientistshadobservedhappeningintheupperatmosphereduringchangesinsolarradiation.Morestudywasneededthough.Thekey49intheexperimentlayinthesatellitedatausedbecauseitspans跨度onlyafewyears.Sotherearestillquestionsconcerningwhetherthecurrentresearchresultsareaccurateandwhethertheycanbe50toothersolarcyclesshesaid.
如图已知正五边形ABCDE内接于⊙O连结BD则∠ABD的度数是
分解因式x2﹣9＝．
Tradehasaprettybadnameinsomequarters.Traderobspoorpeopleofaproperlivingandkeepsthemtrappedinpoverty.Thereisawidelyheldpopularviewthattradeisunfair. Thoughmanyclaimthatafreertradewouldchangethecurrentindecentreputationofworldmarketthecure﹣allfreetradeisthedreamofmosttextbookeconomists.InfactFreetradehasbeenusedsuccessfullybypowerfulcountriestolandtheirmass﹣producedgoodsonfreshoverseasdumpinggroundsandsqueezeoutlocalhouseholdbusinessesandcraftsmanship. Athomethestoryisdifferent.Largefirmshavelittleappetiteforfreetradeandcompetitionintheirownbackyard.Theyprefertoenjoytheadvantagesandprotectionsforwhichtheyhavecarefullyearned.Freethusfiercecompetitionhaslittleappealforthosewhounderstandthattheywillmakemoreprofitiftheycancornerthemarketwhetherathomeorabroad. Bycontrastmakingtradefairerisaboutaddressingbothoutcomesandprocessesoftrade.Fairnessisnotjustmoralrequest.Itaffectsbehaviour.Actuallytheconceptoffairnessincreasessteadilyassocietiesachievegreatermarketuprightness:Businessmenfromuprightsocietiesarewillingtopunishthosewhodonotplayfairevenifthisiscostlytothemselves. Fairertraderatherthanfreertradecouldpartlymendmal﹣administeringofresourcesincertainareas.ThoughthoughtofasevileconomicpoliciesinthewestworldcarefullyplannedspecialpreferencesandprotectionismcouldbeusedintelligentlytohelptoblocktheeconomicrobberyoftherichclassinAfricancountriesandtoimprovethelivesofthebottombillion. Fairnessisalsoimportantinthecontroloftrade.ThecurrentInternationaltradenegotiationshaveresultedinrulesfavouringthepowerful.Therulesaremadeinnegotiationsinwhichthecountriesincontrolcalltheshotsanddonotalwaysdosoingoodfaith.Industrializedcountrieswereoftenfoundtohaveobtaineddefiniteandfar﹣reachingcommitmentsfromdevelopingcountriesinexchangeforvaguepromisessuchastoliberaliseagriculturewhichtheyhavenotkept.Ontheotherhandtheessenceofthefairtradeliesinthepromisethateverypartybenefitfromthebusinessrichorpoorpowerfulorweak. Makingtradefairerisimportanttoavoidafurtherpublichateagainsttrade.Itisalsoimportantsoasbettertobalancetradegoalswithotherimportantnationalgoalssuchasenvironmentalandsocialprotection.Finallytheso﹣calledfreetradesystemneedstobemadefairersothatitdoesnotblockcompetitionandcrushinnovationandbusinessspirit.Itneedstoofferamorelevelplayingfieldtocommercialnewcomersandcompetitorsinrichandpoorcountriesalike. 74.Freetradeisaconceptatrichcountries'serviceto. A.openupnewmarketsabroad B.definetradeintheeconomictextbooks C.dumppollutantsinpoorcountries D.learntheskillsfromlocalhouseholdbusinesses. 75.Thekeymechanismoffairtradeis. A.punishingtherichcountrieswhentheycheatthepoorcountries B.makingsurethatrichcountriesprovidemorechancesforpoorcountries C.promotingspecialpreferencesandprotectionisminpoorareas D.guaranteeingthecommoninterestsofallthedealers 76.Theunderlinedwordmal﹣administeringinthepassageisclosestinmeaningto. A.macro﹣management B.overallcollection C.unevendistribution D.negativemining 77.WhichofthefollowingstatementsisTRUEaccordingtothepassage A.Largefirmsearnhugeprofitsfromfreetradeondomesticmarkets. B.Honestdealerswouldsacrificetheirowninteresttodisciplinethedishonest. C.Specialpreferencesandprotectionismareoccasionallyadoptedinwesterncountries. D.Afairertradehelpstoeasecompetitionbetweentherichandthepoor.
已知抛物线y＝2x2﹣4x+c与x轴有两个不同的交点． 1求c的取值范围 2若抛物线y＝2x2﹣4x+c经过点A2m和点B3n试比较m与n的大小并说明理由．
Pickingauniversityisatenseperiodofaskingyourselfwhichinstitutionismostrelevant.That'swhyuniversityrankingsplaysuchavitalroleinstudentssearchingfortheirnextacademicdirection.Rankingsarealsoaninescapablepartofthereputationandbrandimageofuniversities.Nouniversitywebsiteiscompletewithouttheclaimtobeinthetop100forsomethingorotherreportedtheBBC.Thereasonissimple:Rankingshelpthemtoattractstudentsstaffandresearchinvestment. Currentlytherearenumbersofuniversityrankingsandeachhasitsownlistofcriteria.Butthemaincategoriesarethesame:academicreputationgraduates'performanceandfacultyresources. Howeverexpertspointouttherankingprocessisn'tentirelyreliable.MarkKantrowitzaUSfinancialaidresearchersaiduniversityrankingsweremostlyjustforshow.HewroteinTheNewYorkTimes.Itmaygiveyourparentsbetterbraggingrightsbutthat'saboutit. Moreoverit'snotdifficulttoseethelimitationsofuniversityrankings.Manyrankingsfocusonthenumberoftimesresearchworkiscited引用byotherresearchers.IthelpsBritishandUSuniversitiestodominateglobalrankingsbecauseEnglishisthefavoredlanguageofacademiaJohnO'LearyamemberoftheQSacademicadvisoryboardtoldTheGunrdian.AlsorankingssuchasQSmainlyfocusonthequalitiesoftheuniversityratherthanitsstudents.AnyuniversityrankingislikelytohelpstudentsmakebetterdecisionsaboutwheretostudybuttheneedtobalancethemwithothermorehumanfactorsisalsoimportantsaidPhilMossaneducationandadmissionsconsultant.Advicefromgraduatesorcurrentstudentscanbeasvaluableinprovidingagenuineinsightintotheexperienceorqualityofaparticulardegreeprogram.Itcanalsoaddanelementthatrankingscanneverconvey﹣﹣theactualemotionofauniversityexperience. 32.WhydouniversitiesconsiderrankingsimportantA A.Rankingsmakethemmoreappealing. B.Rankingsarestudents'onlyreference. C.Rankingscanincreasetheiracademiclevel. D.Rankingshelpthemcompletetheirwebsites. 33.WhatdoestheunderlinedItinparagraph4refertoC A.Acadenucresearchwork. B.Thenumberofresearches. C.Thewayofrankinguniversities. D.Thelimitationofuniversityranking. 34.AccordingtoJohnO'LearywhathelpsBritishandUSuniversitiesrankwellA A.ThewideuseofEnglishinacademia. B.Theiroutstandingqualities. C.Theirgraduates'excellentperformance. D.Theacademia'sfavortothem. 35.BesidesrankingwhatdoesPhilMosssuggestyoushouldrefertoifyou'repickingauniversityD A.Investmentineducation. B.Guidancefromprofessors. C.Informationonwebsites. D.Suggestionsfromstudents.
参与本次工业展览会的观众无不对一家参展商所推广的家庭自动报警系统赞不绝口.who.
学校进行广播操比赛如图是20位评委给某班的评分情况统计图则该班的平均得分是分．
已知圆锥的底面半径为5cm母线长为13cm则这个圆锥的侧面积是
这部滑稽的电影的确分散了我注意力让我暂时忘记了这些难题.which.
NotbeingsurewhereIwanttostartthisIwillsaythatIlostmymombackinAprilofthisyear.Shewasninety﹣two.41Iwasnotexpectingherto42andIdon'tthinkshewasexpectingiteither.Iwasveryclosetomymombeinganonlychild.Wedidhave43onthesurfacebutwestillhadacloserelationship44those. Beingnewlymarriedlessthanayearandhavingmovedacoupleoftimes45Ihavehadmorechangesrecentlyinmylifethanatanyotherpointofmyfifty﹣fouryears.StabilityisoneofthegiftsthatMom46meandithadsomany47thatIwasn'tawareofuntilnow.MyhusbandandIhavemadesome48toMom'shomeandwillbemovingattheendofnextweek.Itisnowourhomebutitstillhasmy49heartinit.It'swhereIgrewupandtherearemany50thatwilllivetherewithus.AtthesametimeIamlookingforwardto51someveryhappyandmemorableoneswithmyhusband. Mom52suchabigpartinmylife.Ourliveswere53wovenbecauseshegavemehervalueswhichhavebecomestrongly54inthewomanIamtoday.Idon'thaveanychildrenwhomIcould55theseonto.HoweverMother'svaluesaffectmeeverydaywiththe56IhavewithotherswhetherIknowthemornot.IhopeMomwouldbe57ofwhoIamwhatI'vebecomebecauseofherandof58Iamgoingtolivewithmy59.ShegavemeeverythingIneededtoknowinlife:respectothersandgivehelptootherswho60itmost.IloveyouMomandIwillneverforgetyou. 41.A.However B.Otherwise C.Moreover D.Though 42.A.passout B.passaway C.passby D.passdown 43.A.promises B.agreements C.differences D.similarities 44.A.intermsof B.incaseof C.inneedof D.inspiteof 45.A.once B.since C.though D.either 46.A.saved B.brought C.gave D.taught 47.A.ideas B.thoughts C.meanings D.benefits 48.A.studies B.decisions C.changes D.remarks 49.A.son's B.father's C.mom's D.husband's 50.Amemories B.chances C.choices D.dreams 51.A.receiving B.promising C.making D.supplying 52.A.affected B.played C.controlled D.managed 53.A.brightly B.lightly C.roughly D.tightly 54.A.intended B.designed C.rooted D.admitted 55.A.hold B.pass C.drive D.reply 56A.contact B.interest C.trouble D.effect 57.A.free B.proud C.full D.certain 58.A.what B.where C.why D.when 59.A.life B.children C.husband D.time 60.A.hunt B.need C.treat D.consider
在数学拓展课上小明发现若一条直线经过平行四边形对角线的交点则这条直线平分该平行四边形的面积．如图是由5个边长为1的小正方形拼成的图形P是其中4个小正方形的公共顶点小强在小明的启发下将该图形沿着过点P的某条直线剪一刀把它剪成了面积相等的两部分则剪痕的长度是
计算+正确的结果是
温州地区常受台风侵袭为测量风速小明设计了一台简易风速仪其工作原理如图甲所示．装有挡风板和滑片P的轻质滑块与轻质弹簧套在滑杆MN上弹簧左端固定右端与滑块相连．挡风板的挡风面积为0.2米2均匀电阻丝AB长为20厘米阻值为10欧电源电压U0恒为6伏保护电阻R0为14欧电压表量程0～3伏．弹簧弹力F与弹簧长度改变量x的关系如图乙所示．无风时滑片P在A处有风时滑块移动稳定后读出电压表示数计算并查阅下表数据可知风速及风级． 表中风压p是指与风向垂直的受风面上单位面积增加的压力即单位面积受到的风力．测量时保证风垂直吹在挡风板上不计一切摩擦阻力． 1在滑片P左移的过程中电路的总电阻．选填“变大”“不变”或“变小” 2当电压表示数U为2伏时风速仪所测的风为几级写出计算过程 3小明想在风速仪的电压表上直接标出风速查阅资料后获知该挡风板所受的风力与风速的平方成正比．经计算他画出了风速v与电压表示数U的关系曲线如图丙所示．后因保护电阻R0损坏他将其换成了阻值为5欧的电阻请你在图丙坐标系中大致画出更换电阻后的风速v与电压表示数U的关系曲线并在曲线上标出所能测量的最大风速的对应点Q．
计算﹣23+×8．
众所周知大量砍树对自然平衡有灾难性的影响.As.
AroundfouryearsagoIreceivedacallfromtheprincipalofourschoolastotheParentsViewtalkthenextmorning.Heaskedmetospeaktothegroup.Afterthecallmywholebodybecamefeverishandpanicky.Thetimefromhiscalltothenextmorningseemedlikeyears.ThewholenightIcouldnotsleepwithmanyominousapprehensionsinmind.OneofthemwastocalltheprincipalwithregretandtellhimthatIcouldnotcome.FinallyIgatheredsomecourage.IthoughtIfImissthisopportunitysurelytheschoolwillneverinvitemeagaintoanyoftheirprograms.Ireachedtheschoolintime.Beforemyturncamemywholebodywastrembling.WhenmyturncameandIstartedspeakingmyheartbeatincreasedandmymouthwentdry.Iwasn'tevenabletoreadthewrittenspeechproperly.IwasnotawareofwhereIwasstandingandwhatIwasreading.ThatwasthedaywhenIrealizedmybiggestweaknessPublicSpeaking.AftermyspeechImetwiththeprincipalandexplainedwhathappenedtome.Hetoldmethatthishappenstoeveryone.Evengreatspeakerfacedthesamethingswhentheystarted.HesuggestedthatIcomeagainnexttime.AroundonemonthlaterIwasinvitedtorefertoatopiconMotivation.ThistimeIwasfeelingcomfortable.MyspeechwasnotonlyappreciatedbytheprincipalaswellastheteachersbecauseIwasabletogetmyideaacrosstothem.Theyencouragedandpraisedmyefforts.AfterdeliveringissuccessfullyIbecamemoreconfident.lsaidtomyselfIfIcanspeakinfrontofsuchalearnedaudienceliketheprincipalwhoeducatesothersIcannowspeakinfrontofotherstoo.IstarteddeliveringlecturesinmyplantonvarioustopicslikeSelfMotivationPersonalityDevelopmentPersonalExcellenceSpokenEnglishandPresentationSkills.Thishasbecomeapassionforme.Ilearnedthateverythingispossibleifwehavethecouragetotakethefirststep.24.WhichofthefollowingisthehesttitleforthepassageAA.PracticeMakesaManaBetterSpeechmakerB.PublicSpeakingMakesaManEmbarrassed.C.PrincipalProvidestheBestChances.D.SpokenEnglishDevelopsinMaltingSpeeches.25.TheauthorhadbadfeelingsbeforethespeechbecauseD.A.hedislikedtheideaofgivingalectureB.hehadgotahighfeverbeforethatC.heregrettedacceptingtheinvitationD.hefearedhecouldn'tperformitproperly26.WhatdoestheunderlinedpartominousapprehensionsinthefirstparagraphmeanBA.Unluckyopportunities.B.Negativeideas.C.Curiousviews.D.Happycomments.27.WhatcanweconcludefromthepassageCA.Nothingistobegotwithoutpainsbutpoverty.B.Knowledgemakeshumbleignorancemakesproud.C.Ajourneyofathousandmilesbeginswithasinglestep.D.Necessityisthemotherofinvention.
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