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已知|a|＝3，b2＝16，且|a+b|≠a+b，则代数式a﹣b的值为（ ）
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已知a-3b=2a+b-15=1则代数式a2-4ab+b2+3的值为__________
已知a+b=3ab=2求代数式a3b+2a2b2+ab3的值.
如果代数式a+b=3ab=﹣4那么代数式3ab﹣2b﹣2ab+a+1的值等于
﹣9
﹣13
﹣21
﹣25
化简求值已知a+b=4ab=－2求代数式4a－3b－2ab－a－6b－ab的值
已知a2+b2=6ab=﹣2求代数式4a2+3ab﹣b2﹣7a2﹣5ab+2b2的值.
如果代数式a+b=3ab=﹣4那么代数式3ab﹣2b﹣2ab+a+1的值等于
﹣9
﹣13
﹣21
﹣25
如果a﹣b=3ab=﹣1则代数式3ab﹣a+b﹣2的值是
在平面直角坐标系中已知点A43点B在y轴的正半轴上连结AB以AB为边作矩形ABCD其中AB⊥BC且A
化简或求值已知a＋b＝4ab＝－2求代数式4a－3b－2ab－a－6b－ab的值
已知含字母ab的代数式是3[a2+2b2+ab﹣2]﹣3a2+2b2﹣4ab﹣a﹣11化简代数式2小
已知a+b=3ab=2则代数式a﹣2b﹣2的值是
已知a=2b=-3求代数式2a2-ab+5b的值.
已知a-b=2ab=-3求代数式2a+3b-2ab-a+4b+ab的值．
已知a+b=4ab=﹣2求代数式4a﹣3b﹣2ab﹣a﹣6b﹣ab的值.
1化简代数式3-ab+2a-3a-b+3ab 2已知a=2|b|=3且a＞b求1中化简后的代数式
.已知a﹣b=1且ab=2求代数式a3b﹣2a2b2+ab3的值.
已知实数ab满足ab=1a+b=2求代数式a2b+ab2的值.
已知代数式x﹣2y的值是5则代数式﹣3x+6y+1的值是
16
﹣14
14
﹣16
已知实数ab满足ab＝1a＋b＝2求代数式a2b＋ab2的值.
已知a+b=4ab=﹣2求代数式2a﹣5b﹣2ab﹣a﹣6b﹣ab的值.
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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.
已知在平面直角坐标系xOy中直线l1分别交x轴和y轴于点A﹣30B03． 1如图1已知⊙P经过点O且与直线l1相切于点B求⊙P的直径长 2如图2已知直线l2y＝3x﹣3分别交x轴和y轴于点C和点D点Q是直线l2上的一个动点以Q为圆心2为半径画圆． ①当点Q与点C重合时求证直线l1与⊙Q相切 ②设⊙Q与直线l1相交于MN两点连结QMQN．问是否存在这样的点Q使得△QMN是等腰直角三角形若存在求出点Q的坐标若不存在请说明理由．
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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.
点点同学对数据2636465□52进行统计分析发现其中一个两位数的个位数字被黑水涂污看不到了则计算结果与被涂污数字无关的是
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．
如图P为圆O外一点PAPB分别切圆O于AB两点若PA＝3则PB＝
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.
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
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.
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