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下列不等式在a<b<0的条件下不能成立的是().
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下列不等式在a
a
-1
>b
-1
a
b
2
2
a
>b
设αβ是第二象限的角且sinα<sinβ则下列不等式能成立的是
cosα<cosβ
tanα<tanβ
cotα>cotβ
secα<secβ
已知a<b<0则下列不等式中不能成立的是
|a|>|b|
a
2
>b
2
下列不等式在a<b<0的条件下不能成立的是
A
B
C
D
下列不等式在a<b<0的条件下不能成立的是
选项A
选项B
选项C
选项D
若a
>
>
|a|>|b|
a
2
>b
2
设αβ是第二象限的角且sinα<sinβ则下列不等式能成立的是.
cosα<cosβ
tanα<tanβ
cotα>cotβ
secα<secβ
已知a
a
2
>b
2
下列不等式在a<b<0的条件下不能成立的是.
a-1<b-1
a2>b2
若a>0b>0a+b=2则下列不等式对一切满足条件的ab恒成立的是写出所有正确命题的编号.
若a<b<0则下列不等式不能成立的是
|a|>|b|
a
2
>ab
若a<b<0则下列不等式不能成立的是
|a|>|b|
a
2
>ab
下列不等式在a<b<0的条件下不能成立的是
选项A
选项B
选项C
选项D
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Behindourhouseisthestartofafascinatingtrail小径.Thistrailisoneoftheoldroadsthatwindthroughuntoldmilesofforest.My36BeansandIwalkthetrailfrequently.NormallyBeanssniffsalongsidethetrailtofollowthesmellofadeertrackorexploresomecauseknownonlytohim. Beansisawhitedogquitehandsomeandverysmart.Henotonlyunderstandswhatwetellhimbutalsooftenmakessoundsasifheweretryingto37back. Onemorningwetookadifferentroutewhichledustoanunfamiliartrail.Iwassurethistrailwouldeventuallyleadustoourfamiliar38.Butno.Weseemedtobefaroffcourse.AftertwohoursIsuddenlyrealizedthatBeansprobably39thewayhome.SoIurged"Beanstakemehome."Herandownanewtrail.Butitmerelyledtoanintersection岔道口oftrails. Soonitbecame40thatweweregettingnowhere.Ibegantopicturetherestofthedayinthe41withoutfoodordrink.Wehadwalkedabouttenmiles.ButBeansseemedtotally42Thesniffingandexploringwasgoingwellforhim. Finallywe43acrossroadnearahighway.LadyLucksuggestedIshouldturnleft.Wedidand44reachedacottagebesideafield.Iknockedonthedoorandexplainedmysituationtoanoldman.Helaughedandthendroveushome. SinceouradventureI45thatBeansprobablyknewallalonghowtogethome. Hewasjusthavingtoomuchfanexploringnewtrails. 44
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Iwillalwaysremembermymother’slastfewdaysinthisworld.OnFebruary14th2000myclasswentonafieldtriptothebeach.Ihadsomuchfun.Whenwereturnedtoschoolmyteachertoldmetogototheheadmaster’soffice.WhenIgotintotheofficeIsawapoliceofficer.SuddenlyIrealizedsomethingwaswrong.Thepoliceofficertoldmewhathadhappenedandwewenttopickmysisterup.Afterthatwewenttothehospitalandwaited.Timewentslowly.Finallywegottoseeourmother.Itwasterrible.Onthenextdaytheheadmastercameandtoldmytwoteacherswhathadhappened.Iwastakingarestthatday.Iknewithadsomethingtodowithmymother.Ikeptthinkingthatsheeitherdiedorhadgottenbetter.HowIwishedthatshehadgottenbetter.Whenmyteachertookmeoutsidemysisterranuptome.ShestartedcryingShe’sgone.Teresamommy’sgone.She’sdead.Icouldn’tbelieveit.Wejumpedintothecaranddrovestraighttothehospital.Mostofmyfamilywerethere.Thesilencewasterrible.IknewIhadtosaygoodbye.TodaywhenIlookbackIstillmissmymotherverymuchbutIknowthatIwilllive.Mymotherwasastrongmotherwhohadthebiggestheart.Mymotherwasanangelwalkingontheearth.Iwillalwaysrememberherasliving.WhensomeoneisaskedwhotheirheroistheyusuallysaysomeonefamouslikeMichaelJordanorBritneySpears.WhensomeoneasksmewhomyheroisItellthemmymother.Mymotherliveseveryday.Thatiswhatmakesheratruehero.Thewritermustthinkhermotherisa______woman.
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Behindourhouseisthestartofafascinatingtrail小径.Thistrailisoneoftheoldroadsthatwindthroughuntoldmilesofforest.My36BeansandIwalkthetrailfrequently.NormallyBeanssniffsalongsidethetrailtofollowthesmellofadeertrackorexploresomecauseknownonlytohim. Beansisawhitedogquitehandsomeandverysmart.Henotonlyunderstandswhatwetellhimbutalsooftenmakessoundsasifheweretryingto37back. Onemorningwetookadifferentroutewhichledustoanunfamiliartrail.Iwassurethistrailwouldeventuallyleadustoourfamiliar38.Butno.Weseemedtobefaroffcourse.AftertwohoursIsuddenlyrealizedthatBeansprobably39thewayhome.SoIurged"Beanstakemehome."Herandownanewtrail.Butitmerelyledtoanintersection岔道口oftrails. Soonitbecame40thatweweregettingnowhere.Ibegantopicturetherestofthedayinthe41withoutfoodordrink.Wehadwalkedabouttenmiles.ButBeansseemedtotally42Thesniffingandexploringwasgoingwellforhim. Finallywe43acrossroadnearahighway.LadyLucksuggestedIshouldturnleft.Wedidand44reachedacottagebesideafield.Iknockedonthedoorandexplainedmysituationtoanoldman.Helaughedandthendroveushome. SinceouradventureI45thatBeansprobablyknewallalonghowtogethome. Hewasjusthavingtoomuchfanexploringnewtrails. 38
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EddieMcKayaonceforgottenpilotisasubjectofgreatinteresttoagroupofhistorystudentsinCanada.ItallstartedwhenGrahamBroadaprofessorattheUniversityofWesternOntariofoundMcKay’snameinafootnoteinabookaboutuniversityhistory.MckaywasincludedinalistofuniversityalumniwhohadservedduringtheFirstWorldWarbuthisnamewasunfamiliartoBroadaspecialistinmilitaryhistory.OutofcuriosityBroadspenthoursatthelocalarchivesinafruitlesssearchforinformationonMcKay.Tiredanddiscouragedhefinallygaveup.OnhiswayoutBroad’sglancehappenedtofallonanexhibitingcaseshowingsomeoldnewspapers.Hiseyewasdrawntoanoldpictureofayoungmaninarugbyuniform.Ashereadthewordsbesidethepictureheexperiencedathrillingrealization.AfterlookingforhimalldaytherehewasstaringupatmeoutoftheexhibitingcasesaidBroad.ExcitedbythefindBroadaskedhisstudentstocontinuehissearch.Theycombedoldnewspapersandothermaterialsforclues.Graduallyapicturecameintoview.CaptainAlfredEdwinMcKayjoinedtheBritishRoyalFlyingCorpsin1916.HedownedtenenemyplanesoutlivedhisentiresquadronasaWW1flyerspentsometimeasaflyinginstructorinEnglandthenreturnedtothefrontwherehewaseventuallyshotdownoverBelgiumandkilledinDecember1917.Butthere’smoretohisstory.Forabrieftimein1916hewasprobablythemostfamouspilotintheworldsaysBroad.HewascreditedwithdowningOswaldBoelckethemostfamousGermanpilotatthetime.YetinaletterhomeMcKayrefusedtotakecreditsayingthatBoelckehadactuallycrashedintoanotherGermanplane.McKay’swarrecordsweredestroyedduringWorldWarTwoairbombingonLondon-anexplanationforwhyhewasallbutforgotten.ButnowthankstotheeffortsofBroadandhisstudentsamarkerinMcKay’smemorywasplacedontheuniversitygroundsinNovember2007.IfoundmyeyesfillingwithtearsasIreadtheword’deceased’nexttohisnamesaidCoreyEverrettastudentwhofoundapictureofMckayinhisuniform.ThiswassuchasimpleexampleofthefactthathehadbeenastudentjustlikeusbutinsteadoffinishinghistimeatWesternhechosetofightanddieforhiscountry./WhatdidthestudentsfindoutaboutMcKay
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Behindourhouseisthestartofafascinatingtrail小径.Thistrailisoneoftheoldroadsthatwindthroughuntoldmilesofforest.My36BeansandIwalkthetrailfrequently.NormallyBeanssniffsalongsidethetrailtofollowthesmellofadeertrackorexploresomecauseknownonlytohim. Beansisawhitedogquitehandsomeandverysmart.Henotonlyunderstandswhatwetellhimbutalsooftenmakessoundsasifheweretryingto37back. Onemorningwetookadifferentroutewhichledustoanunfamiliartrail.Iwassurethistrailwouldeventuallyleadustoourfamiliar38.Butno.Weseemedtobefaroffcourse.AftertwohoursIsuddenlyrealizedthatBeansprobably39thewayhome.SoIurged"Beanstakemehome."Herandownanewtrail.Butitmerelyledtoanintersection岔道口oftrails. Soonitbecame40thatweweregettingnowhere.Ibegantopicturetherestofthedayinthe41withoutfoodordrink.Wehadwalkedabouttenmiles.ButBeansseemedtotally42Thesniffingandexploringwasgoingwellforhim. Finallywe43acrossroadnearahighway.LadyLucksuggestedIshouldturnleft.Wedidand44reachedacottagebesideafield.Iknockedonthedoorandexplainedmysituationtoanoldman.Helaughedandthendroveushome. SinceouradventureI45thatBeansprobablyknewallalonghowtogethome. Hewasjusthavingtoomuchfanexploringnewtrails. 40
Ranch.ItwasnearLosAngelesinCaliforniA.AfewyearslaterHollywoodwasoneofthefamousplacesintheworld.Atthebeginningofthe20thcenturytherewasabigfarmcalledHollywood.Fromthe1910’stothe1950’sHollywoodwasthefilmcenteroftheworld.Everyfamilyknewthenamesofitsfilmstars—CharlieChaplinGretaGarboBergmanandhundredsmore.ThereasonwhypeoplewenttoHollywoodtomakefilmswasthesun.AtfirstpeoplemadefilmsinNewYorkontheeastcoastoftheUnitedStates.ButthentheyheardaboutLosAngeleswherethereare350daysofthesuneveryyear.Astheymadeallthefilmsbysunlightthewestcoastwasamuchbetterplacetowork.AlsonearHollywoodyoucanfindmountainsandseaanddesert.Theydidnothavetotravelfartomakeanykindoffilm.WhenTVbecamepopularHollywoodstartedmakingfilmsfortelevision.Theninthe1970’stheydiscoveredpeoplestillwenttothecinematoseebigexpensivefilms.NowadaystheyarestillmakingfilmsinHollywoodandpeopleseethemallovertheworld.Whowasnotmentionedasafilmstarinthepassage______.
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Behindourhouseisthestartofafascinatingtrail小径.Thistrailisoneoftheoldroadsthatwindthroughuntoldmilesofforest.My36BeansandIwalkthetrailfrequently.NormallyBeanssniffsalongsidethetrailtofollowthesmellofadeertrackorexploresomecauseknownonlytohim. Beansisawhitedogquitehandsomeandverysmart.Henotonlyunderstandswhatwetellhimbutalsooftenmakessoundsasifheweretryingto37back. Onemorningwetookadifferentroutewhichledustoanunfamiliartrail.Iwassurethistrailwouldeventuallyleadustoourfamiliar38.Butno.Weseemedtobefaroffcourse.AftertwohoursIsuddenlyrealizedthatBeansprobably39thewayhome.SoIurged"Beanstakemehome."Herandownanewtrail.Butitmerelyledtoanintersection岔道口oftrails. Soonitbecame40thatweweregettingnowhere.Ibegantopicturetherestofthedayinthe41withoutfoodordrink.Wehadwalkedabouttenmiles.ButBeansseemedtotally42Thesniffingandexploringwasgoingwellforhim. Finallywe43acrossroadnearahighway.LadyLucksuggestedIshouldturnleft.Wedidand44reachedacottagebesideafield.Iknockedonthedoorandexplainedmysituationtoanoldman.Helaughedandthendroveushome. SinceouradventureI45thatBeansprobablyknewallalonghowtogethome. Hewasjusthavingtoomuchfanexploringnewtrails. 42
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Iwillalwaysremembermymother’slastfewdaysinthisworld.OnFebruary14th2000myclasswentonafieldtriptothebeach.Ihadsomuchfun.Whenwereturnedtoschoolmyteachertoldmetogototheheadmaster’soffice.WhenIgotintotheofficeIsawapoliceofficer.SuddenlyIrealizedsomethingwaswrong.Thepoliceofficertoldmewhathadhappenedandwewenttopickmysisterup.Afterthatwewenttothehospitalandwaited.Timewentslowly.Finallywegottoseeourmother.Itwasterrible.Onthenextdaytheheadmastercameandtoldmytwoteacherswhathadhappened.Iwastakingarestthatday.Iknewithadsomethingtodowithmymother.Ikeptthinkingthatsheeitherdiedorhadgottenbetter.HowIwishedthatshehadgottenbetter.Whenmyteachertookmeoutsidemysisterranuptome.ShestartedcryingShe’sgone.Teresamommy’sgone.She’sdead.Icouldn’tbelieveit.Wejumpedintothecaranddrovestraighttothehospital.Mostofmyfamilywerethere.Thesilencewasterrible.IknewIhadtosaygoodbye.TodaywhenIlookbackIstillmissmymotherverymuchbutIknowthatIwilllive.Mymotherwasastrongmotherwhohadthebiggestheart.Mymotherwasanangelwalkingontheearth.Iwillalwaysrememberherasliving.WhensomeoneisaskedwhotheirheroistheyusuallysaysomeonefamouslikeMichaelJordanorBritneySpears.WhensomeoneasksmewhomyheroisItellthemmymother.Mymotherliveseveryday.Thatiswhatmakesheratruehero.Whatdidtheheadmastertellthetwoteachersonthenextday______
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EddieMcKayaonceforgottenpilotisasubjectofgreatinteresttoagroupofhistorystudentsinCanada.ItallstartedwhenGrahamBroadaprofessorattheUniversityofWesternOntariofoundMcKay’snameinafootnoteinabookaboutuniversityhistory.MckaywasincludedinalistofuniversityalumniwhohadservedduringtheFirstWorldWarbuthisnamewasunfamiliartoBroadaspecialistinmilitaryhistory.OutofcuriosityBroadspenthoursatthelocalarchivesinafruitlesssearchforinformationonMcKay.Tiredanddiscouragedhefinallygaveup.OnhiswayoutBroad’sglancehappenedtofallonanexhibitingcaseshowingsomeoldnewspapers.Hiseyewasdrawntoanoldpictureofayoungmaninarugbyuniform.Ashereadthewordsbesidethepictureheexperiencedathrillingrealization.AfterlookingforhimalldaytherehewasstaringupatmeoutoftheexhibitingcasesaidBroad.ExcitedbythefindBroadaskedhisstudentstocontinuehissearch.Theycombedoldnewspapersandothermaterialsforclues.Graduallyapicturecameintoview.CaptainAlfredEdwinMcKayjoinedtheBritishRoyalFlyingCorpsin1916.HedownedtenenemyplanesoutlivedhisentiresquadronasaWW1flyerspentsometimeasaflyinginstructorinEnglandthenreturnedtothefrontwherehewaseventuallyshotdownoverBelgiumandkilledinDecember1917.Butthere’smoretohisstory.Forabrieftimein1916hewasprobablythemostfamouspilotintheworldsaysBroad.HewascreditedwithdowningOswaldBoelckethemostfamousGermanpilotatthetime.YetinaletterhomeMcKayrefusedtotakecreditsayingthatBoelckehadactuallycrashedintoanotherGermanplane.McKay’swarrecordsweredestroyedduringWorldWarTwoairbombingonLondon-anexplanationforwhyhewasallbutforgotten.ButnowthankstotheeffortsofBroadandhisstudentsamarkerinMcKay’smemorywasplacedontheuniversitygroundsinNovember2007.IfoundmyeyesfillingwithtearsasIreadtheword’deceased’nexttohisnamesaidCoreyEverrettastudentwhofoundapictureofMckayinhisuniform.ThiswassuchasimpleexampleofthefactthathehadbeenastudentjustlikeusbutinsteadoffinishinghistimeatWesternhechosetofightanddieforhiscountry./WecanlearnfromthelastparagraphthatMcKay______.
Ranch.ItwasnearLosAngelesinCaliforniA.AfewyearslaterHollywoodwasoneofthefamousplacesintheworld.Atthebeginningofthe20thcenturytherewasabigfarmcalledHollywood.Fromthe1910’stothe1950’sHollywoodwasthefilmcenteroftheworld.Everyfamilyknewthenamesofitsfilmstars—CharlieChaplinGretaGarboBergmanandhundredsmore.ThereasonwhypeoplewenttoHollywoodtomakefilmswasthesun.AtfirstpeoplemadefilmsinNewYorkontheeastcoastoftheUnitedStates.ButthentheyheardaboutLosAngeleswherethereare350daysofthesuneveryyear.Astheymadeallthefilmsbysunlightthewestcoastwasamuchbetterplacetowork.AlsonearHollywoodyoucanfindmountainsandseaanddesert.Theydidnothavetotravelfartomakeanykindoffilm.WhenTVbecamepopularHollywoodstartedmakingfilmsfortelevision.Theninthe1970’stheydiscoveredpeoplestillwenttothecinematoseebigexpensivefilms.NowadaystheyarestillmakingfilmsinHollywoodandpeopleseethemallovertheworld.Whichstatementistrue
Behindourhouseisthestartofafascinatingtrail小径.Thistrailisoneoftheoldroadsthatwindthroughuntoldmilesofforest.My36BeansandIwalkthetrailfrequently.NormallyBeanssniffsalongsidethetrailtofollowthesmellofadeertrackorexploresomecauseknownonlytohim. Beansisawhitedogquitehandsomeandverysmart.Henotonlyunderstandswhatwetellhimbutalsooftenmakessoundsasifheweretryingto37back. Onemorningwetookadifferentroutewhichledustoanunfamiliartrail.Iwassurethistrailwouldeventuallyleadustoourfamiliar38.Butno.Weseemedtobefaroffcourse.AftertwohoursIsuddenlyrealizedthatBeansprobably39thewayhome.SoIurged"Beanstakemehome."Herandownanewtrail.Butitmerelyledtoanintersection岔道口oftrails. Soonitbecame40thatweweregettingnowhere.Ibegantopicturetherestofthedayinthe41withoutfoodordrink.Wehadwalkedabouttenmiles.ButBeansseemedtotally42Thesniffingandexploringwasgoingwellforhim. Finallywe43acrossroadnearahighway.LadyLucksuggestedIshouldturnleft.Wedidand44reachedacottagebesideafield.Iknockedonthedoorandexplainedmysituationtoanoldman.Helaughedandthendroveushome. SinceouradventureI45thatBeansprobablyknewallalonghowtogethome. Hewasjusthavingtoomuchfanexploringnewtrails. 36
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