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Directions: You are the leader of an English Corner. Write an invitation letter to ask an internati...
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Text2Thereisnothinglikethejoyoffindingoutthatsomethingsinfulisactuallygoodforyouwhetherit’ssexchocolateoraglassoffinezedwine--orforthatmatterbeerwhiskyorasatisfyingaperitif.We’velongheardexcitinghintsthatredwinehasuniquebenefitsfortheheart.Butthesamesunnyreputationforhearthealthisnowstartingtoshineonallliquor."Nomatterwhereyoulookthedominantalcoholicbeverageisbeneficial--whetherit’sredwineinFranceandItalysakeinJapanorbeerinGermany"saysDr.WalterWillettchairofnutritionattheHarvardSchoolofPublicHealth.Thishasledresearcherstoaninescapableconclusion.Ashealthfulascomponentsofredwinemaybetheprimarybenefitmustcomefromethanolitself.Inshortit’sthealcoholstupid.Butdon’tgooverboard.Protectioncomesonlywithlighttomoderateintake--twodrinksadayformenoramiserlyoneadayforwomen.ThemajorbenefitofalcoholseemstocomefromitsabilitytoboostlevelsofHDLthegoodcholesterolthathelpskeeparteriesclearofplaque.EthanoldoesthatbysignalingthelivertomakemoreofasubstancecalledApoAlthemajorproteininHDL.Theeffectscanbestriking."Dependingontheindividualyoucangetincreasesof10to30percentinHDLinaweek"saysHarvardepidemiologistEricRimm.Alcoholalsomakesbloodlessstickyandlesslikelytoformclotsthatcauseheartattacksandstrokes.Italsoappearstohavemildanti-inflammatoryeffects.Anditenhancesinsulinsensitivity--whichmayexplainwhymoderatealcoholconsumptioncorrelateswithalowerincidenceoftype2diabetes.ButalcoholisadietaryJekyllandHyde.Heavyintakecanraisebloodpressureincreaseirregularheartbeatandleadtoheartfailure.Themostsoberingnewsconcernscancer.Arecentanalysisof156studiesfoundthatasalcoholintakeincreasessodorisksoftumorsinthemouthandliver.Evenmoderatedrinkingcanboostbreast-cancerriskasmallamount.IsmoderatedrinkingworththerisksForsomepeople--pregnantwomenpeoplewithliverdiseaseorahistoryofalcoholism--theanswerisno.Butformostofusthebenefitswillprobablyoutweighthehazards.Whetheryousipwinebeerorspiritsyourheartmaythankyou. ItcanbeinferredfromPara3that
Text3IssittingintrafficasinevitableasdeathandtaxesPerhapsnot.Manycountriesnowhavededicatedtraffic-monitoringcentreslinkedtonetworksofcamerasandsensors.Throwintraffic-spottingaircraftaccidentreportsandtheknownpositionsofbusesfittedwithsatellite-positioninggearanditispossibletoseeexactlywhatishappeningontheroads.Driverscouldswitchfrombusytoquietroutesandavoidcongestion-ifonlytheyhadaccesstothisinformation.Andnowtheydo.SystemssuchastheTrafficMessageChannelandtheVehicleInformationandCommunicationSystemVICSinEuropeandJapanrespectivelypipe.datafromtrafficcentresintoin-carnavigationsystemsviaFMradiosignals.Driverscanseewherethetrafficisandtrytoavoidit.HondaaJapanesecarmakerevencombinesVICSdatawithpositiondatafrom150000vehiclesbelongingtomembersofitsPremiumClubsothattheycanchoosethefastestlaneonacongestedroadsaysDavidSchrierofABIResearchaconsultancy.MeanwhileITISaBritishcompanyisoneofseveralfirmsexperimentingwithmobile-phonesignalstomonitortrafficonroadsthatlacksensorsorcameras.Itssoftwarehooksintoamobileoperator’snetworkandusesastatisticalapproachtodeducetrafficspeedsasphonesare"handedoff"fromonecelltowertoanother.ThedatamustbecleaneduptoexcludepedestriansandcyclistsbutthisideahasgreatpotentialsaysMrSchrier.Anotherwaytododgetrafficistopredictwhereandwhenitwillform.InRedmondWashingtonattheheadquartersofMicrosoftemployeeshavebeentestingatraffic-predictionsystemcalledJamBayes.Usersregistertheirroutepreferencesandthenreceivealertsbye-mailortextmessagewarningthemofimpendingtrafficjam.JamBayesusesatechniquecalledBayesianmodelingtocombinereal-timetrafficdatawithhistoricaltrendsweatherinformationandalistofcalendareventssuchasholidays.EricHorvitzofMicrosoftwhodevelopedthesystemsaysitisaccurate75%ofthetimeand3000employeesuseitdaily.AsystemcalledBeat-the-TrafficdevelopedbyTriangleSoftwareofCampbellCaliforniawithfundingfromtheNationalScienceFoundationgoesfurther.Itnotonlywarnsdriversofimpendingtrafficbutalsosuggestsanalternativerouteviae-mailortextmessage.AndreGueziecthefirm’sbossthinkstrafficforecastswillbecomeasprevalentasweatherforecasts.IndeedinJuneKXTVNews10aTVstationinSacramentoCaliforniabeganshowingTriangle’strafficforecastsforthecomingweek. Theuseofmobile-phonesignalsinmonitoringtrafficis
Text3IssittingintrafficasinevitableasdeathandtaxesPerhapsnot.Manycountriesnowhavededicatedtraffic-monitoringcentreslinkedtonetworksofcamerasandsensors.Throwintraffic-spottingaircraftaccidentreportsandtheknownpositionsofbusesfittedwithsatellite-positioninggearanditispossibletoseeexactlywhatishappeningontheroads.Driverscouldswitchfrombusytoquietroutesandavoidcongestion-ifonlytheyhadaccesstothisinformation.Andnowtheydo.SystemssuchastheTrafficMessageChannelandtheVehicleInformationandCommunicationSystemVICSinEuropeandJapanrespectivelypipe.datafromtrafficcentresintoin-carnavigationsystemsviaFMradiosignals.Driverscanseewherethetrafficisandtrytoavoidit.HondaaJapanesecarmakerevencombinesVICSdatawithpositiondatafrom150000vehiclesbelongingtomembersofitsPremiumClubsothattheycanchoosethefastestlaneonacongestedroadsaysDavidSchrierofABIResearchaconsultancy.MeanwhileITISaBritishcompanyisoneofseveralfirmsexperimentingwithmobile-phonesignalstomonitortrafficonroadsthatlacksensorsorcameras.Itssoftwarehooksintoamobileoperator’snetworkandusesastatisticalapproachtodeducetrafficspeedsasphonesare"handedoff"fromonecelltowertoanother.ThedatamustbecleaneduptoexcludepedestriansandcyclistsbutthisideahasgreatpotentialsaysMrSchrier.Anotherwaytododgetrafficistopredictwhereandwhenitwillform.InRedmondWashingtonattheheadquartersofMicrosoftemployeeshavebeentestingatraffic-predictionsystemcalledJamBayes.Usersregistertheirroutepreferencesandthenreceivealertsbye-mailortextmessagewarningthemofimpendingtrafficjam.JamBayesusesatechniquecalledBayesianmodelingtocombinereal-timetrafficdatawithhistoricaltrendsweatherinformationandalistofcalendareventssuchasholidays.EricHorvitzofMicrosoftwhodevelopedthesystemsaysitisaccurate75%ofthetimeand3000employeesuseitdaily.AsystemcalledBeat-the-TrafficdevelopedbyTriangleSoftwareofCampbellCaliforniawithfundingfromtheNationalScienceFoundationgoesfurther.Itnotonlywarnsdriversofimpendingtrafficbutalsosuggestsanalternativerouteviae-mailortextmessage.AndreGueziecthefirm’sbossthinkstrafficforecastswillbecomeasprevalentasweatherforecasts.IndeedinJuneKXTVNews10aTVstationinSacramentoCaliforniabeganshowingTriangle’strafficforecastsforthecomingweek. Toknowwhatisexactlyhappeningontheroadswedon'tneedto
SectionⅠUseofEnglishDirections:Readthefollowingtext.Choosethebestwordsforeachnumberedblankandmark[A][B][C]or[D]onANSWERSHEET1.Manymobileoperatorsalreadyofferaselectionoftelevisionchannelsorindividualshowswhicharesent1acrosstheirthird-generation3Gnetworks.InSouthKoreatelevisionisalsosenttomobilephonesviasatelliteandterrestrialbroadcastnetworkswhichisfarmore2thansendingvideoacrossmobilenetworks;similarbroadcastswillbegininJapaninApril.Similarmobile-TVnetworkswillalsobebuiltinFinlandandAmericaandarebeing3inmanyothercountries.MeanwhileAppleComputerwhich4avideo-capableversionofitsiPodportablemusicplayerinthisOctoberis5abargainwithtelevisionnetworkstoexpandthe6ofshowsthatcanbepurchased7viewingonthedevice.AndmobileTVwasoneofthebig8attheworld’slargesttechnologyfairtheConsumerElectronicShow.9allthisactivityhoweverthe10formobileTVareunclear.Forastartnobody11knowsifconsumerswillpayforitthoughsurveyssuggesttheyliketheidea.One12agencyofthefieldsaystherewillbe125mmobile-TVusersby2010butmanyothermobiletechnologiesinspiredhighhopesandthenfailedto13uptoexpectations.And14peopledowantTVonthemovethereis15uncertaintyinthreeareas:technologybusinessmodelsandthe16itself.The17formobileTVisvastinshortbut18isthedegreeofuncertaintyoverhowitshouldactuallybeputintopractice.Mostobserversdonotexpectwidespread19ofmobileTVifitcomesatalluntil2008attheearliestsincebuildingtherequiredecosystemoftechnologypartnershipsandcontentwill20sometime. Readthefollowingtext.ChoosethebestwordsforeachnumberedblankandmarkABCorDonANSWERSHEET1.7
由于金融产品的市场价格如证券价格金融衍生产品价格的变动而使金融机构面临损失的风险是
第三窗口贷款发放的主体是
SectionⅠUseofEnglishDirections:Readthefollowingtext.Choosethebestwordsforeachnumberedblankandmark[A][B][C]or[D]onANSWERSHEET1.Manymobileoperatorsalreadyofferaselectionoftelevisionchannelsorindividualshowswhicharesent1acrosstheirthird-generation3Gnetworks.InSouthKoreatelevisionisalsosenttomobilephonesviasatelliteandterrestrialbroadcastnetworkswhichisfarmore2thansendingvideoacrossmobilenetworks;similarbroadcastswillbegininJapaninApril.Similarmobile-TVnetworkswillalsobebuiltinFinlandandAmericaandarebeing3inmanyothercountries.MeanwhileAppleComputerwhich4avideo-capableversionofitsiPodportablemusicplayerinthisOctoberis5abargainwithtelevisionnetworkstoexpandthe6ofshowsthatcanbepurchased7viewingonthedevice.AndmobileTVwasoneofthebig8attheworld’slargesttechnologyfairtheConsumerElectronicShow.9allthisactivityhoweverthe10formobileTVareunclear.Forastartnobody11knowsifconsumerswillpayforitthoughsurveyssuggesttheyliketheidea.One12agencyofthefieldsaystherewillbe125mmobile-TVusersby2010butmanyothermobiletechnologiesinspiredhighhopesandthenfailedto13uptoexpectations.And14peopledowantTVonthemovethereis15uncertaintyinthreeareas:technologybusinessmodelsandthe16itself.The17formobileTVisvastinshortbut18isthedegreeofuncertaintyoverhowitshouldactuallybeputintopractice.Mostobserversdonotexpectwidespread19ofmobileTVifitcomesatalluntil2008attheearliestsincebuildingtherequiredecosystemoftechnologypartnershipsandcontentwill20sometime. Readthefollowingtext.ChoosethebestwordsforeachnumberedblankandmarkABCorDonANSWERSHEET1.1
Text2Thereisnothinglikethejoyoffindingoutthatsomethingsinfulisactuallygoodforyouwhetherit’ssexchocolateoraglassoffinezedwine--orforthatmatterbeerwhiskyorasatisfyingaperitif.We’velongheardexcitinghintsthatredwinehasuniquebenefitsfortheheart.Butthesamesunnyreputationforhearthealthisnowstartingtoshineonallliquor."Nomatterwhereyoulookthedominantalcoholicbeverageisbeneficial--whetherit’sredwineinFranceandItalysakeinJapanorbeerinGermany"saysDr.WalterWillettchairofnutritionattheHarvardSchoolofPublicHealth.Thishasledresearcherstoaninescapableconclusion.Ashealthfulascomponentsofredwinemaybetheprimarybenefitmustcomefromethanolitself.Inshortit’sthealcoholstupid.Butdon’tgooverboard.Protectioncomesonlywithlighttomoderateintake--twodrinksadayformenoramiserlyoneadayforwomen.ThemajorbenefitofalcoholseemstocomefromitsabilitytoboostlevelsofHDLthegoodcholesterolthathelpskeeparteriesclearofplaque.EthanoldoesthatbysignalingthelivertomakemoreofasubstancecalledApoAlthemajorproteininHDL.Theeffectscanbestriking."Dependingontheindividualyoucangetincreasesof10to30percentinHDLinaweek"saysHarvardepidemiologistEricRimm.Alcoholalsomakesbloodlessstickyandlesslikelytoformclotsthatcauseheartattacksandstrokes.Italsoappearstohavemildanti-inflammatoryeffects.Anditenhancesinsulinsensitivity--whichmayexplainwhymoderatealcoholconsumptioncorrelateswithalowerincidenceoftype2diabetes.ButalcoholisadietaryJekyllandHyde.Heavyintakecanraisebloodpressureincreaseirregularheartbeatandleadtoheartfailure.Themostsoberingnewsconcernscancer.Arecentanalysisof156studiesfoundthatasalcoholintakeincreasessodorisksoftumorsinthemouthandliver.Evenmoderatedrinkingcanboostbreast-cancerriskasmallamount.IsmoderatedrinkingworththerisksForsomepeople--pregnantwomenpeoplewithliverdiseaseorahistoryofalcoholism--theanswerisno.Butformostofusthebenefitswillprobablyoutweighthehazards.Whetheryousipwinebeerorspiritsyourheartmaythankyou. AccordingtoDr.WalterWillettforgoodhealthpeoplecoulddrink
采取价格上限政策可能造成的福利效应是
国际宏观政策协调的主要内容是什么其主要障碍是什么
Text4Thescourgethat’splaguingcruiselines--andcausingthousandsoftouriststorethinktheirholidaytravelplans--didn’tstartthisyearnordiditevenstartonaship.ItbeganasfarastheCentersforDiseaseControlCDCcantellinNorwalkU.S.inOctober1968when116elementaryschoolchildrenandteacherssuddenlybecameiii.TheCDCinvestigatedandthecausewasdiscoveredtobeasmallsphericalpreviouslyunclassifiedvirusthatscientistsnamedappropriatelyenoughtheNorwalkvirus.Flashforward34yearsandNorwalk-likevirusesthere’sawholefamilyofthemarealloverthenewsasoneoceanlinerafteranotherlimpsintoportwithpassengerscomplainingofnauseaandvomiting.TheCDCwhichgetscalledinwhenevermorethan2%ofavessel’spassengerscomedownwiththesamediseaseidentifiedNorwalkastheinfectiousagentandoversawthoroughshipcleaning--whichtothedismayoftheownersofthecruiselineshaven’tmadetheproblemgoaway.SoareweinthemiddleofanoceangoingepidemicNotaccordingtoDaveForneychiefoftheCDC’svessel-sanitationprogram.Heseesthiskindofthingallthetime;asimilaroutbreakonseveralshipsinAlaskalastyeargotalmostnopress.Infacthesaysasfarasgastrointestinalillnessgoesfewerpeoplemaybegettingsickthisyearthanlast.Norwalk-likevirusesitturnsoutareextremelycommon--perhapssecondonlytocoldviruses-andtheytendtobreakoutwheneverpeoplecongregateinclosequartersformorethantwoorthreedays.Oceangoingpleasureshipsprovideexcellentbreedinggroundsbutsodoschoolshotelscampsnursinghomesandhospitals."Wheneverwelookforthisvirus"saysDr.MarcWiddowsonaCDCepidemiologist"wefindit."Justlastweek100studentsof500attheVarsityAcresElementarySchoolinCalgaryCanadastayedhomesick.SchooltrickHardly.TheNorwalkvirushadstruckagain.Ifoceancruisesareyourideaoffundon’tdespair.Thismightevenbeagreattimetogoshippingforabargain.Theshipshavebeencleaned.Thefoodandwaterhavebeenexaminedandfoundvirusfree.AccordingtotheCDCitwasprobablythepassengerswhobroughtthevirusaboard.Ofcourseifyouareiiiorrecoveringfromastomachbugyoumightdoeverybodyafavorandputoffyourtraveluntiltheinfectiousperiodhaspasseditcantakeacoupleofweeks.Toreduceyourchancesofgettingsickthebestthingtodoiswashyourhands--frequentlyandthoroughly--andkeepthemoutof’yourmouth.Onemorething:iflikemeyouarepronetomotionsicknessdon’tforgettopackyourDramamine. Wecanlearnfromthefourthparagraphthat
SectionⅠUseofEnglishDirections:Readthefollowingtext.Choosethebestwordsforeachnumberedblankandmark[A][B][C]or[D]onANSWERSHEET1.Manymobileoperatorsalreadyofferaselectionoftelevisionchannelsorindividualshowswhicharesent1acrosstheirthird-generation3Gnetworks.InSouthKoreatelevisionisalsosenttomobilephonesviasatelliteandterrestrialbroadcastnetworkswhichisfarmore2thansendingvideoacrossmobilenetworks;similarbroadcastswillbegininJapaninApril.Similarmobile-TVnetworkswillalsobebuiltinFinlandandAmericaandarebeing3inmanyothercountries.MeanwhileAppleComputerwhich4avideo-capableversionofitsiPodportablemusicplayerinthisOctoberis5abargainwithtelevisionnetworkstoexpandthe6ofshowsthatcanbepurchased7viewingonthedevice.AndmobileTVwasoneofthebig8attheworld’slargesttechnologyfairtheConsumerElectronicShow.9allthisactivityhoweverthe10formobileTVareunclear.Forastartnobody11knowsifconsumerswillpayforitthoughsurveyssuggesttheyliketheidea.One12agencyofthefieldsaystherewillbe125mmobile-TVusersby2010butmanyothermobiletechnologiesinspiredhighhopesandthenfailedto13uptoexpectations.And14peopledowantTVonthemovethereis15uncertaintyinthreeareas:technologybusinessmodelsandthe16itself.The17formobileTVisvastinshortbut18isthedegreeofuncertaintyoverhowitshouldactuallybeputintopractice.Mostobserversdonotexpectwidespread19ofmobileTVifitcomesatalluntil2008attheearliestsincebuildingtherequiredecosystemoftechnologypartnershipsandcontentwill20sometime. Readthefollowingtext.ChoosethebestwordsforeachnumberedblankandmarkABCorDonANSWERSHEET1.15
比较两个投资顾问的业绩一个的平均收益率为19%而另一个为16%但是前者的β值为1.5后者的β值为1 1你能判断哪个投资顾问更善于预测个股吗不考虑市场的总体趋势 2如果国库券利率为6%这一期间市场收益率为14%哪个投资者在选股方面更出色 3如果国库券利率为3%这一期间的市场收益率是15%呢
SectionⅡReadingComprehensionPartADirections:Readthefollowingfourtexts.Answerthequestionsbeloweachtextbychoosing[A][B][C]or[D].MarkyouranswersonANSWERSHEET1.Text1Worldoilproductionisabouttoreachapeakandgointoitsfinaldecline.Foryearsahandfulofpetroleumgeologistsincludingmehavebeenpredictingpeakoilbefore2007butinaneraofcheapoilfewpeoplelistened.Latelyseveralmajoroilcompaniesseemtohavegotthemessage.OneofChevron’sadssaystheworldiscurrentlyburning2bbl.ofoilforeverybarrelofnewoildiscovered.ExxonMobilsays1987wasthelastyearthatwefoundmoreoilworldwidethanweburned.ShellreportsthatitwillexpanditsCanadianoil-sandsoperationsbutelsewherewillfocusonfindingnaturalgasandnotoil.ItsoundsasthoughShelliskissingtheoilbusinessgoodbye.M.KingHubbertageophysicistcorrectlypredictedin1956thatoilproductionintheU.S.wouldpeakintheearly1970s--themomentnowknownas"Hubbert’sPeak"Ibelieveworldoilproductionisabouttoreachasimilarpeak.Findingoilislikefishinginapond.Afterseveralmonthsyounoticethatyouarenotcatchingasmanyfish.Youcouldbuyanexpensiveflyrod-newtechnology.Oryoucoulddecidethatyouhavealreadycaughtmostofthefishinthepond.Althoughincreasedoilpriceswhichoughttospurinvestmentinoilproductionandnewtechnologyhelptheycan’tworkmagic.Recentdiscoveriesaremodestatbest.TheoilsandsinCanadaandVenezuelaareextensivehuttheCanadianoperationstoconvertthedepositsintotransportableoilconsumelargeamountsofnaturalgaswhichisinshortsupply.AndtechnologycannoteliminatethedifficultyHubbertidentified:therateofproducingoildependsonthefractionofoilthathasnotyetbeenproduced.Inotherwordsthefewerthefishinthepondtheharderitistocatchone.Peakproductionoccursatthehalfwaypoint.Basedontheavailabledataaboutnewoilfieldsthereare2013billionbbl.oftotalproducibleoil.Addinguptheoilproducedfromthebirthoftheindustryuntiltodaywewillreachthedreaded1006.5-billion-bbl.halfwaymarklatethisyear.FortwoyearsI’vebeenpredictingthatworldoilproductionwouldreachitspeakonThanksgivingDay2005.TodaywithhighoilpricespushingvirtuallyalloilproducerstopullupeverybarreltheycansweatoutofthegroundIthinkitmighthappenevenearlier. Theauthorusesthesimileoffishandpondtoexplainthat
SectionⅠUseofEnglishDirections:Readthefollowingtext.Choosethebestwordsforeachnumberedblankandmark[A][B][C]or[D]onANSWERSHEET1.Manymobileoperatorsalreadyofferaselectionoftelevisionchannelsorindividualshowswhicharesent1acrosstheirthird-generation3Gnetworks.InSouthKoreatelevisionisalsosenttomobilephonesviasatelliteandterrestrialbroadcastnetworkswhichisfarmore2thansendingvideoacrossmobilenetworks;similarbroadcastswillbegininJapaninApril.Similarmobile-TVnetworkswillalsobebuiltinFinlandandAmericaandarebeing3inmanyothercountries.MeanwhileAppleComputerwhich4avideo-capableversionofitsiPodportablemusicplayerinthisOctoberis5abargainwithtelevisionnetworkstoexpandthe6ofshowsthatcanbepurchased7viewingonthedevice.AndmobileTVwasoneofthebig8attheworld’slargesttechnologyfairtheConsumerElectronicShow.9allthisactivityhoweverthe10formobileTVareunclear.Forastartnobody11knowsifconsumerswillpayforitthoughsurveyssuggesttheyliketheidea.One12agencyofthefieldsaystherewillbe125mmobile-TVusersby2010butmanyothermobiletechnologiesinspiredhighhopesandthenfailedto13uptoexpectations.And14peopledowantTVonthemovethereis15uncertaintyinthreeareas:technologybusinessmodelsandthe16itself.The17formobileTVisvastinshortbut18isthedegreeofuncertaintyoverhowitshouldactuallybeputintopractice.Mostobserversdonotexpectwidespread19ofmobileTVifitcomesatalluntil2008attheearliestsincebuildingtherequiredecosystemoftechnologypartnershipsandcontentwill20sometime. Readthefollowingtext.ChoosethebestwordsforeachnumberedblankandmarkABCorDonANSWERSHEET1.13
SectionⅠUseofEnglishDirections:Readthefollowingtext.Choosethebestwordsforeachnumberedblankandmark[A][B][C]or[D]onANSWERSHEET1.Manymobileoperatorsalreadyofferaselectionoftelevisionchannelsorindividualshowswhicharesent1acrosstheirthird-generation3Gnetworks.InSouthKoreatelevisionisalsosenttomobilephonesviasatelliteandterrestrialbroadcastnetworkswhichisfarmore2thansendingvideoacrossmobilenetworks;similarbroadcastswillbegininJapaninApril.Similarmobile-TVnetworkswillalsobebuiltinFinlandandAmericaandarebeing3inmanyothercountries.MeanwhileAppleComputerwhich4avideo-capableversionofitsiPodportablemusicplayerinthisOctoberis5abargainwithtelevisionnetworkstoexpandthe6ofshowsthatcanbepurchased7viewingonthedevice.AndmobileTVwasoneofthebig8attheworld’slargesttechnologyfairtheConsumerElectronicShow.9allthisactivityhoweverthe10formobileTVareunclear.Forastartnobody11knowsifconsumerswillpayforitthoughsurveyssuggesttheyliketheidea.One12agencyofthefieldsaystherewillbe125mmobile-TVusersby2010butmanyothermobiletechnologiesinspiredhighhopesandthenfailedto13uptoexpectations.And14peopledowantTVonthemovethereis15uncertaintyinthreeareas:technologybusinessmodelsandthe16itself.The17formobileTVisvastinshortbut18isthedegreeofuncertaintyoverhowitshouldactuallybeputintopractice.Mostobserversdonotexpectwidespread19ofmobileTVifitcomesatalluntil2008attheearliestsincebuildingtherequiredecosystemoftechnologypartnershipsandcontentwill20sometime. Readthefollowingtext.ChoosethebestwordsforeachnumberedblankandmarkABCorDonANSWERSHEET1.3
SectionⅠUseofEnglishDirections:Readthefollowingtext.Choosethebestwordsforeachnumberedblankandmark[A][B][C]or[D]onANSWERSHEET1.Manymobileoperatorsalreadyofferaselectionoftelevisionchannelsorindividualshowswhicharesent1acrosstheirthird-generation3Gnetworks.InSouthKoreatelevisionisalsosenttomobilephonesviasatelliteandterrestrialbroadcastnetworkswhichisfarmore2thansendingvideoacrossmobilenetworks;similarbroadcastswillbegininJapaninApril.Similarmobile-TVnetworkswillalsobebuiltinFinlandandAmericaandarebeing3inmanyothercountries.MeanwhileAppleComputerwhich4avideo-capableversionofitsiPodportablemusicplayerinthisOctoberis5abargainwithtelevisionnetworkstoexpandthe6ofshowsthatcanbepurchased7viewingonthedevice.AndmobileTVwasoneofthebig8attheworld’slargesttechnologyfairtheConsumerElectronicShow.9allthisactivityhoweverthe10formobileTVareunclear.Forastartnobody11knowsifconsumerswillpayforitthoughsurveyssuggesttheyliketheidea.One12agencyofthefieldsaystherewillbe125mmobile-TVusersby2010butmanyothermobiletechnologiesinspiredhighhopesandthenfailedto13uptoexpectations.And14peopledowantTVonthemovethereis15uncertaintyinthreeareas:technologybusinessmodelsandthe16itself.The17formobileTVisvastinshortbut18isthedegreeofuncertaintyoverhowitshouldactuallybeputintopractice.Mostobserversdonotexpectwidespread19ofmobileTVifitcomesatalluntil2008attheearliestsincebuildingtherequiredecosystemoftechnologypartnershipsandcontentwill20sometime. Readthefollowingtext.ChoosethebestwordsforeachnumberedblankandmarkABCorDonANSWERSHEET1.19
一垄断厂商以常数平均成本和边际成本AC=MC=3生产该垄断者面临以下市场需求曲线Q=30-P1计算该垄断者的利润最大化价格和产量并计算出其利润为多少2假设第二个厂商加入该市场两厂商形成古诺Cournot竞争记Q1为第一个厂商的产量Q2为第二个厂商的产量现在市场需求函数为Q1+Q2=30-P设第一个厂商的边际成本仍为3第二个厂商的边际成本为6试求各厂商的反应曲线3计算古诺均衡求出市场价格和各厂商的利润4为什么古诺竞争中两厂商的总产量比第一个厂商作为垄断者时的产量要高
SectionⅠUseofEnglishDirections:Readthefollowingtext.Choosethebestwordsforeachnumberedblankandmark[A][B][C]or[D]onANSWERSHEET1.Manymobileoperatorsalreadyofferaselectionoftelevisionchannelsorindividualshowswhicharesent1acrosstheirthird-generation3Gnetworks.InSouthKoreatelevisionisalsosenttomobilephonesviasatelliteandterrestrialbroadcastnetworkswhichisfarmore2thansendingvideoacrossmobilenetworks;similarbroadcastswillbegininJapaninApril.Similarmobile-TVnetworkswillalsobebuiltinFinlandandAmericaandarebeing3inmanyothercountries.MeanwhileAppleComputerwhich4avideo-capableversionofitsiPodportablemusicplayerinthisOctoberis5abargainwithtelevisionnetworkstoexpandthe6ofshowsthatcanbepurchased7viewingonthedevice.AndmobileTVwasoneofthebig8attheworld’slargesttechnologyfairtheConsumerElectronicShow.9allthisactivityhoweverthe10formobileTVareunclear.Forastartnobody11knowsifconsumerswillpayforitthoughsurveyssuggesttheyliketheidea.One12agencyofthefieldsaystherewillbe125mmobile-TVusersby2010butmanyothermobiletechnologiesinspiredhighhopesandthenfailedto13uptoexpectations.And14peopledowantTVonthemovethereis15uncertaintyinthreeareas:technologybusinessmodelsandthe16itself.The17formobileTVisvastinshortbut18isthedegreeofuncertaintyoverhowitshouldactuallybeputintopractice.Mostobserversdonotexpectwidespread19ofmobileTVifitcomesatalluntil2008attheearliestsincebuildingtherequiredecosystemoftechnologypartnershipsandcontentwill20sometime. Readthefollowingtext.ChoosethebestwordsforeachnumberedblankandmarkABCorDonANSWERSHEET1.9
SectionⅠUseofEnglishDirections:Readthefollowingtext.Choosethebestwordsforeachnumberedblankandmark[A][B][C]or[D]onANSWERSHEET1.Manymobileoperatorsalreadyofferaselectionoftelevisionchannelsorindividualshowswhicharesent1acrosstheirthird-generation3Gnetworks.InSouthKoreatelevisionisalsosenttomobilephonesviasatelliteandterrestrialbroadcastnetworkswhichisfarmore2thansendingvideoacrossmobilenetworks;similarbroadcastswillbegininJapaninApril.Similarmobile-TVnetworkswillalsobebuiltinFinlandandAmericaandarebeing3inmanyothercountries.MeanwhileAppleComputerwhich4avideo-capableversionofitsiPodportablemusicplayerinthisOctoberis5abargainwithtelevisionnetworkstoexpandthe6ofshowsthatcanbepurchased7viewingonthedevice.AndmobileTVwasoneofthebig8attheworld’slargesttechnologyfairtheConsumerElectronicShow.9allthisactivityhoweverthe10formobileTVareunclear.Forastartnobody11knowsifconsumerswillpayforitthoughsurveyssuggesttheyliketheidea.One12agencyofthefieldsaystherewillbe125mmobile-TVusersby2010butmanyothermobiletechnologiesinspiredhighhopesandthenfailedto13uptoexpectations.And14peopledowantTVonthemovethereis15uncertaintyinthreeareas:technologybusinessmodelsandthe16itself.The17formobileTVisvastinshortbut18isthedegreeofuncertaintyoverhowitshouldactuallybeputintopractice.Mostobserversdonotexpectwidespread19ofmobileTVifitcomesatalluntil2008attheearliestsincebuildingtherequiredecosystemoftechnologypartnershipsandcontentwill20sometime. Readthefollowingtext.ChoosethebestwordsforeachnumberedblankandmarkABCorDonANSWERSHEET1.11
SectionⅡReadingComprehensionPartADirections:Readthefollowingfourtexts.Answerthequestionsbeloweachtextbychoosing[A][B][C]or[D].MarkyouranswersonANSWERSHEET1.Text1Worldoilproductionisabouttoreachapeakandgointoitsfinaldecline.Foryearsahandfulofpetroleumgeologistsincludingmehavebeenpredictingpeakoilbefore2007butinaneraofcheapoilfewpeoplelistened.Latelyseveralmajoroilcompaniesseemtohavegotthemessage.OneofChevron’sadssaystheworldiscurrentlyburning2bbl.ofoilforeverybarrelofnewoildiscovered.ExxonMobilsays1987wasthelastyearthatwefoundmoreoilworldwidethanweburned.ShellreportsthatitwillexpanditsCanadianoil-sandsoperationsbutelsewherewillfocusonfindingnaturalgasandnotoil.ItsoundsasthoughShelliskissingtheoilbusinessgoodbye.M.KingHubbertageophysicistcorrectlypredictedin1956thatoilproductionintheU.S.wouldpeakintheearly1970s--themomentnowknownas"Hubbert’sPeak"Ibelieveworldoilproductionisabouttoreachasimilarpeak.Findingoilislikefishinginapond.Afterseveralmonthsyounoticethatyouarenotcatchingasmanyfish.Youcouldbuyanexpensiveflyrod-newtechnology.Oryoucoulddecidethatyouhavealreadycaughtmostofthefishinthepond.Althoughincreasedoilpriceswhichoughttospurinvestmentinoilproductionandnewtechnologyhelptheycan’tworkmagic.Recentdiscoveriesaremodestatbest.TheoilsandsinCanadaandVenezuelaareextensivehuttheCanadianoperationstoconvertthedepositsintotransportableoilconsumelargeamountsofnaturalgaswhichisinshortsupply.AndtechnologycannoteliminatethedifficultyHubbertidentified:therateofproducingoildependsonthefractionofoilthathasnotyetbeenproduced.Inotherwordsthefewerthefishinthepondtheharderitistocatchone.Peakproductionoccursatthehalfwaypoint.Basedontheavailabledataaboutnewoilfieldsthereare2013billionbbl.oftotalproducibleoil.Addinguptheoilproducedfromthebirthoftheindustryuntiltodaywewillreachthedreaded1006.5-billion-bbl.halfwaymarklatethisyear.FortwoyearsI’vebeenpredictingthatworldoilproductionwouldreachitspeakonThanksgivingDay2005.TodaywithhighoilpricespushingvirtuallyalloilproducerstopullupeverybarreltheycansweatoutofthegroundIthinkitmighthappenevenearlier. ThephraseHubbert'sPeakLine9Paragraph1hererefersto
设c1c2和c3分别表示协议价格为X1X2X3的欧式看涨期权的价格其中X3＞X2＞X1且X3-X2=X2-X1所有期权的到期日相同请证明c2≤0.5c1+c3
Text3IssittingintrafficasinevitableasdeathandtaxesPerhapsnot.Manycountriesnowhavededicatedtraffic-monitoringcentreslinkedtonetworksofcamerasandsensors.Throwintraffic-spottingaircraftaccidentreportsandtheknownpositionsofbusesfittedwithsatellite-positioninggearanditispossibletoseeexactlywhatishappeningontheroads.Driverscouldswitchfrombusytoquietroutesandavoidcongestion-ifonlytheyhadaccesstothisinformation.Andnowtheydo.SystemssuchastheTrafficMessageChannelandtheVehicleInformationandCommunicationSystemVICSinEuropeandJapanrespectivelypipe.datafromtrafficcentresintoin-carnavigationsystemsviaFMradiosignals.Driverscanseewherethetrafficisandtrytoavoidit.HondaaJapanesecarmakerevencombinesVICSdatawithpositiondatafrom150000vehiclesbelongingtomembersofitsPremiumClubsothattheycanchoosethefastestlaneonacongestedroadsaysDavidSchrierofABIResearchaconsultancy.MeanwhileITISaBritishcompanyisoneofseveralfirmsexperimentingwithmobile-phonesignalstomonitortrafficonroadsthatlacksensorsorcameras.Itssoftwarehooksintoamobileoperator’snetworkandusesastatisticalapproachtodeducetrafficspeedsasphonesare"handedoff"fromonecelltowertoanother.ThedatamustbecleaneduptoexcludepedestriansandcyclistsbutthisideahasgreatpotentialsaysMrSchrier.Anotherwaytododgetrafficistopredictwhereandwhenitwillform.InRedmondWashingtonattheheadquartersofMicrosoftemployeeshavebeentestingatraffic-predictionsystemcalledJamBayes.Usersregistertheirroutepreferencesandthenreceivealertsbye-mailortextmessagewarningthemofimpendingtrafficjam.JamBayesusesatechniquecalledBayesianmodelingtocombinereal-timetrafficdatawithhistoricaltrendsweatherinformationandalistofcalendareventssuchasholidays.EricHorvitzofMicrosoftwhodevelopedthesystemsaysitisaccurate75%ofthetimeand3000employeesuseitdaily.AsystemcalledBeat-the-TrafficdevelopedbyTriangleSoftwareofCampbellCaliforniawithfundingfromtheNationalScienceFoundationgoesfurther.Itnotonlywarnsdriversofimpendingtrafficbutalsosuggestsanalternativerouteviae-mailortextmessage.AndreGueziecthefirm’sbossthinkstrafficforecastswillbecomeasprevalentasweatherforecasts.IndeedinJuneKXTVNews10aTVstationinSacramentoCaliforniabeganshowingTriangle’strafficforecastsforthecomingweek. JamBayesisdifferentfromthepreviouslymentionedtechnologiesasit
SectionⅠUseofEnglishDirections:Readthefollowingtext.Choosethebestwordsforeachnumberedblankandmark[A][B][C]or[D]onANSWERSHEET1.Manymobileoperatorsalreadyofferaselectionoftelevisionchannelsorindividualshowswhicharesent1acrosstheirthird-generation3Gnetworks.InSouthKoreatelevisionisalsosenttomobilephonesviasatelliteandterrestrialbroadcastnetworkswhichisfarmore2thansendingvideoacrossmobilenetworks;similarbroadcastswillbegininJapaninApril.Similarmobile-TVnetworkswillalsobebuiltinFinlandandAmericaandarebeing3inmanyothercountries.MeanwhileAppleComputerwhich4avideo-capableversionofitsiPodportablemusicplayerinthisOctoberis5abargainwithtelevisionnetworkstoexpandthe6ofshowsthatcanbepurchased7viewingonthedevice.AndmobileTVwasoneofthebig8attheworld’slargesttechnologyfairtheConsumerElectronicShow.9allthisactivityhoweverthe10formobileTVareunclear.Forastartnobody11knowsifconsumerswillpayforitthoughsurveyssuggesttheyliketheidea.One12agencyofthefieldsaystherewillbe125mmobile-TVusersby2010butmanyothermobiletechnologiesinspiredhighhopesandthenfailedto13uptoexpectations.And14peopledowantTVonthemovethereis15uncertaintyinthreeareas:technologybusinessmodelsandthe16itself.The17formobileTVisvastinshortbut18isthedegreeofuncertaintyoverhowitshouldactuallybeputintopractice.Mostobserversdonotexpectwidespread19ofmobileTVifitcomesatalluntil2008attheearliestsincebuildingtherequiredecosystemoftechnologypartnershipsandcontentwill20sometime. Readthefollowingtext.ChoosethebestwordsforeachnumberedblankandmarkABCorDonANSWERSHEET1.17
SectionⅡReadingComprehensionPartADirections:Readthefollowingfourtexts.Answerthequestionsbeloweachtextbychoosing[A][B][C]or[D].MarkyouranswersonANSWERSHEET1.Text1Worldoilproductionisabouttoreachapeakandgointoitsfinaldecline.Foryearsahandfulofpetroleumgeologistsincludingmehavebeenpredictingpeakoilbefore2007butinaneraofcheapoilfewpeoplelistened.Latelyseveralmajoroilcompaniesseemtohavegotthemessage.OneofChevron’sadssaystheworldiscurrentlyburning2bbl.ofoilforeverybarrelofnewoildiscovered.ExxonMobilsays1987wasthelastyearthatwefoundmoreoilworldwidethanweburned.ShellreportsthatitwillexpanditsCanadianoil-sandsoperationsbutelsewherewillfocusonfindingnaturalgasandnotoil.ItsoundsasthoughShelliskissingtheoilbusinessgoodbye.M.KingHubbertageophysicistcorrectlypredictedin1956thatoilproductionintheU.S.wouldpeakintheearly1970s--themomentnowknownas"Hubbert’sPeak"Ibelieveworldoilproductionisabouttoreachasimilarpeak.Findingoilislikefishinginapond.Afterseveralmonthsyounoticethatyouarenotcatchingasmanyfish.Youcouldbuyanexpensiveflyrod-newtechnology.Oryoucoulddecidethatyouhavealreadycaughtmostofthefishinthepond.Althoughincreasedoilpriceswhichoughttospurinvestmentinoilproductionandnewtechnologyhelptheycan’tworkmagic.Recentdiscoveriesaremodestatbest.TheoilsandsinCanadaandVenezuelaareextensivehuttheCanadianoperationstoconvertthedepositsintotransportableoilconsumelargeamountsofnaturalgaswhichisinshortsupply.AndtechnologycannoteliminatethedifficultyHubbertidentified:therateofproducingoildependsonthefractionofoilthathasnotyetbeenproduced.Inotherwordsthefewerthefishinthepondtheharderitistocatchone.Peakproductionoccursatthehalfwaypoint.Basedontheavailabledataaboutnewoilfieldsthereare2013billionbbl.oftotalproducibleoil.Addinguptheoilproducedfromthebirthoftheindustryuntiltodaywewillreachthedreaded1006.5-billion-bbl.halfwaymarklatethisyear.FortwoyearsI’vebeenpredictingthatworldoilproductionwouldreachitspeakonThanksgivingDay2005.TodaywithhighoilpricespushingvirtuallyalloilproducerstopullupeverybarreltheycansweatoutofthegroundIthinkitmighthappenevenearlier. Whatdoestheauthormeanbysayingtherecentdiscoveriesaremodest
下列哪种现象可以作为反对半强式效率市场假说的证据
下列命题不正确的是
SectionⅠUseofEnglishDirections:Readthefollowingtext.Choosethebestwordsforeachnumberedblankandmark[A][B][C]or[D]onANSWERSHEET1.Manymobileoperatorsalreadyofferaselectionoftelevisionchannelsorindividualshowswhicharesent1acrosstheirthird-generation3Gnetworks.InSouthKoreatelevisionisalsosenttomobilephonesviasatelliteandterrestrialbroadcastnetworkswhichisfarmore2thansendingvideoacrossmobilenetworks;similarbroadcastswillbegininJapaninApril.Similarmobile-TVnetworkswillalsobebuiltinFinlandandAmericaandarebeing3inmanyothercountries.MeanwhileAppleComputerwhich4avideo-capableversionofitsiPodportablemusicplayerinthisOctoberis5abargainwithtelevisionnetworkstoexpandthe6ofshowsthatcanbepurchased7viewingonthedevice.AndmobileTVwasoneofthebig8attheworld’slargesttechnologyfairtheConsumerElectronicShow.9allthisactivityhoweverthe10formobileTVareunclear.Forastartnobody11knowsifconsumerswillpayforitthoughsurveyssuggesttheyliketheidea.One12agencyofthefieldsaystherewillbe125mmobile-TVusersby2010butmanyothermobiletechnologiesinspiredhighhopesandthenfailedto13uptoexpectations.And14peopledowantTVonthemovethereis15uncertaintyinthreeareas:technologybusinessmodelsandthe16itself.The17formobileTVisvastinshortbut18isthedegreeofuncertaintyoverhowitshouldactuallybeputintopractice.Mostobserversdonotexpectwidespread19ofmobileTVifitcomesatalluntil2008attheearliestsincebuildingtherequiredecosystemoftechnologypartnershipsandcontentwill20sometime. Readthefollowingtext.ChoosethebestwordsforeachnumberedblankandmarkABCorDonANSWERSHEET1.5
如果资源的配置是帕累托有效的那么
某公司2006年10月1日发行一可转换债券规定5年到期还本付息发行后6个月可转换债券的持有者可以自行决定是否转换为该公司的股票该可转换债券的有效期限为
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