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若曲线f（x）=ax2+lnx存在垂直于y轴的切线，则实数a的取值范围是（）.
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若曲线fx＝ax5＋lnx存在垂直于y轴的切线则实数a的取值范围是________.
若曲线fx=ax2-lnx存在垂直于y轴的切线则实数a的取值范围是．
函数fx=lnx+ax存在与直线2x﹣y=0平行的切线则实数a的取值范围是
设函数fx＝ax＋sinx＋cosx.若函数fx的图象上存在不同的两点A.B.使得曲线y＝fx在点A
已知函数fx=lnx+ax2+bab∈R.Ⅰ若曲线y=fx在x=1处的切线为y=﹣1求函数fx的单调
若曲线y=lnx+ax2a为常数不存在斜率为负数的切线则实数a的取值范围是
（﹣
，+∞）
[﹣
，+∞）
（0，+∞）
[0，+∞）
.若曲线fx=ax3+lnx存在垂直于y轴的切线则实数a的取值范围是.
若曲线fx=ax2+lnx存在垂直于y轴的切线则实数a的取值范围是．
若函数fx=x2-ax+lnx存在垂直于y轴的切线则实数a的取值范围是.
已知函数fx=e﹣2x﹣axa为常数的图象与y轴交于点A曲线y=fx在点A处的切线垂直于直线x+2y
已知a为常数若曲线y=ax2+3x﹣lnx存在与直线x+y﹣1=0垂直的切线则实数a的取值范围是
[﹣
，+∞）
（﹣∞，﹣
]
[﹣1，+∞）
（﹣∞，﹣1]
设函数fx=ex﹣ax2﹣ex+b其中e为自然对数的底数.SX030301Ⅰ若曲线fx在y轴上的截距
已知函数fx＝x3＋1－ax2－aa＋2x＋bab∈R..1若函数fx的图象过原点且在原点处的切线斜
若函数fx＝x2－ax＋lnx存在垂直于y轴的切线则实数a的取值范围是___
已知函数fx＝x3＋1－ax2－aa＋2x＋bab∈R..1若函数fx的图像过原点且在原点处的切线斜
函数fx=lnx+ax存在与直线2x﹣y=0平行的切线则实数a的取值范围是
（﹣∞，2]
（﹣∞，2）
[0，+∞）
（2，+∞）
已知函数fx＝ex＋axgx＝exlnx.e≈2.71828.1设曲线y＝fx在x＝1处的切线与直线
已知函数fx＝x2－ax＋2lnxa∈R.Ⅰ若曲线y＝fx在1f1处的切线垂直于直线y＝x求函数fx
设函数fx＝ax＋sinx＋cosx.若函数fx的图象上存在不同的两点A.B.使得曲线y＝fx在点A
若曲线fx＝ax3＋lnx存在垂直于y轴的切线则实数a的取值范围是________.
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WhenDavewaseighteenheboughtasecondhandcarfor200sothathecouldtraveltoandfromworkmore1thanbybus.Itworkedquitewellforafewyearsbutthenitgotsooldanditwascostinghim2muchinrepairsthathedecidedthathehadbetter3it. Heaskedamonghisfriendstoseeifanyonewasparticularly4tobuyacheapcarbuttheyallknewthatitwasfallingtopiecesso5ofthemhadanydesiretobuyit.Dave’sfriendSamsawthathewas6whentheymetoneeveningandsaid"What’s7Dave" DavetoldhimandSamanswered"WellwhataboutadvertisingitinthepaperYoumay8moreforitthatwaythanthecostoftheadvertisement!"ThinkingthatSam’s9wassensibleheputanadvertisementinaneveningpaperwhichread"Forsale:smallcar10verylittlepetrolonlytwoowners.Bargainat50."Fortwodaysaftertheadvertisementfirstappearedtherewasno11.ButthenonSaturdayeveninghehadanenquiry.Amanrangupandsaidhewouldliketo12himaboutthecar."Allright"Davesaidfeelinghappy.Heaskedthemanwhetherteno’clockthenextmorningwouldbe13ornot."Fine"themansaid"andI’ll14mywife.Weintendtogoforarideinitto15it." ThenextmorningataquartertotenDaveparkedthecarinthesquareoutsidehisfrontdoor16towaitthereforthepeoplewhohad17hisadvertisement.EvenDavehadto18thatthecarreallylookedlikeawreck.Thensoonafterhehadgotthecarasclean19itcouldbeapolicecarstoppedjustbehindhimandapolicemangotout.HelookedatDave’scarandthensaid"Haveyoureportedthis20tousyetsir/ 13.
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WhenDavewaseighteenheboughtasecondhandcarfor200sothathecouldtraveltoandfromworkmore1thanbybus.Itworkedquitewellforafewyearsbutthenitgotsooldanditwascostinghim2muchinrepairsthathedecidedthathehadbetter3it. Heaskedamonghisfriendstoseeifanyonewasparticularly4tobuyacheapcarbuttheyallknewthatitwasfallingtopiecesso5ofthemhadanydesiretobuyit.Dave’sfriendSamsawthathewas6whentheymetoneeveningandsaid"What’s7Dave" DavetoldhimandSamanswered"WellwhataboutadvertisingitinthepaperYoumay8moreforitthatwaythanthecostoftheadvertisement!"ThinkingthatSam’s9wassensibleheputanadvertisementinaneveningpaperwhichread"Forsale:smallcar10verylittlepetrolonlytwoowners.Bargainat50."Fortwodaysaftertheadvertisementfirstappearedtherewasno11.ButthenonSaturdayeveninghehadanenquiry.Amanrangupandsaidhewouldliketo12himaboutthecar."Allright"Davesaidfeelinghappy.Heaskedthemanwhetherteno’clockthenextmorningwouldbe13ornot."Fine"themansaid"andI’ll14mywife.Weintendtogoforarideinitto15it." ThenextmorningataquartertotenDaveparkedthecarinthesquareoutsidehisfrontdoor16towaitthereforthepeoplewhohad17hisadvertisement.EvenDavehadto18thatthecarreallylookedlikeawreck.Thensoonafterhehadgotthecarasclean19itcouldbeapolicecarstoppedjustbehindhimandapolicemangotout.HelookedatDave’scarandthensaid"Haveyoureportedthis20tousyetsir/ 1.
Solongasteachersfailtodistinguishdifferbetweenteachingandlearningtheywillcontinuetoundertaketodoforchildrenthatwhichonlychildrencandoforthemselves.Teachingchildrentoreadisnotpassingreadingontothem.Itiscertainlynotendlesshoursspentinactivitiesaboutreading.Douglasinsiststhat"readingcannotbetaughtdirectlyandschoolsshouldstoptryingtodotheimpossible". Teachingandlearningaretwoentirelydifferentprocesses.Theydifferinkindandfunction.Thefunctionofteachingistocreatetheconditionsandtheclimatethatwillmakeitpossibleforchildrentoplancleverlythemostefficientsystemforteachingthemselvestoread.Teachingisalsoapublicactivity.Itcanbeseenandobserved. Learningtoreadinvolvesallthateachindividualdoestounderstandtheworldofprintedlanguage.Almostallofitisprivateforlearningisanoccupationofthemindandthatprocessisnotopentopublicscrutiny. IfteacherandlearnerrolesarenotinterchangeablewhatthencanbedonethroughteachingthatwillaidthechildinthelongsearchforknowledgeSmithhasoneprincipleruleforallteachinginstructions."Makelearningtoreadeasywhichmeansmakingreadingameaningfulenjoyableandfrequentexperienceforchildren." Whentherolesofteacherandlearnerareseenforwhattheyareandwhenbothteacherandlearnerfulfillthemproperlythenmuchofthepressureandfeelingoffailureforbothisgotridof.Learningtoreadismadeeasierwhenteacherscreateanenvironmentwherechildrenaregiventhechancetosolvetheproblemoflearningtoreadbylearning. Theteachingofreadingwillbesuccessfulif.
Therearetwotypesofpeopleintheworld.Althoughtheyhaveequaldegreeofhealthandwealthandothercomfortsoflifeonebecomeshappyandtheotherbecomesunhappy.Thisarisesfromthedifferentwaysinwhichtheyconsiderthingspersonseventsandtheresultingeffectsupontheirminds. Peoplewhoaretobehappyfixtheirattentionontheconvenienceofthings;thepleasantpartsofconversationthewellprepareddishesthegoodnessofthewineandthefineweather.Theyenjoyallthecheerfulthings.Thosewhoaretobeunhappythinkandspeakonlyoftheoppositethings.Thereforetheyarecontinuallydissatisfied.Bytheirremarkstheysourthepleasureofsocietyoffendhurtmanypeopleandmakethemselvesdisagreeableeverywhere.Ifthisturnofmindwasfoundedinnaturesuchunhappypersonswouldbethemoretobepitied.Theintentionofcriticizingandbeingdislikedisperhapstakenupbyimitation.Itgrowsintoahabitunknowntoitspossessors.Thehabitmaybestrongbutitmaybecuredwhenthosewhohaveitrealizeitsbadeffectsontheirinterestsandtastes.Ihopethislittlewarningmayheofservicetothemandhelpthemchangethishabit. Althoughinfactitischieflyanactoftheimaginationithasseriousresultsinlifesinceitbringsondeepsorrowandbadluck.Thosepeopleoffendmanyothers;nobodylovesthemandnoonetreatsthemwithmorethanthemostcommonpolitenessandrespect.Thisfrequentlyputstheminbadtemperanddrawsthemintoarguments.Iftheyaimatgettingsomeadvantagesinsocialpositionorfortunenobodywishesthemsuccess.Norwillanyonestartasteporspeakawordtofavortheirhopes.Iftheybringonthemselvespublicobjectionsnoonewilldefendorexcusethemandmanywilljointocriticizetheirwrongdoings.Theseshouldchangethisbadhabitandbepleasedwithwhatispleasingwithoutworryingneedlesslyaboutthemselvesandothers.Iftheydonotitwillbegoodforotherstoavoidanycontactwiththem.Otherwiseitcanbedisagreeableandsometimesveryinconvenientespeciallywhenonebecomesmixedupintheirquarrels. Inthispassagethewritermainly.
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Therearetwotypesofpeopleintheworld.Althoughtheyhaveequaldegreeofhealthandwealthandothercomfortsoflifeonebecomeshappyandtheotherbecomesunhappy.Thisarisesfromthedifferentwaysinwhichtheyconsiderthingspersonseventsandtheresultingeffectsupontheirminds. Peoplewhoaretobehappyfixtheirattentionontheconvenienceofthings;thepleasantpartsofconversationthewellprepareddishesthegoodnessofthewineandthefineweather.Theyenjoyallthecheerfulthings.Thosewhoaretobeunhappythinkandspeakonlyoftheoppositethings.Thereforetheyarecontinuallydissatisfied.Bytheirremarkstheysourthepleasureofsocietyoffendhurtmanypeopleandmakethemselvesdisagreeableeverywhere.Ifthisturnofmindwasfoundedinnaturesuchunhappypersonswouldbethemoretobepitied.Theintentionofcriticizingandbeingdislikedisperhapstakenupbyimitation.Itgrowsintoahabitunknowntoitspossessors.Thehabitmaybestrongbutitmaybecuredwhenthosewhohaveitrealizeitsbadeffectsontheirinterestsandtastes.Ihopethislittlewarningmayheofservicetothemandhelpthemchangethishabit. Althoughinfactitischieflyanactoftheimaginationithasseriousresultsinlifesinceitbringsondeepsorrowandbadluck.Thosepeopleoffendmanyothers;nobodylovesthemandnoonetreatsthemwithmorethanthemostcommonpolitenessandrespect.Thisfrequentlyputstheminbadtemperanddrawsthemintoarguments.Iftheyaimatgettingsomeadvantagesinsocialpositionorfortunenobodywishesthemsuccess.Norwillanyonestartasteporspeakawordtofavortheirhopes.Iftheybringonthemselvespublicobjectionsnoonewilldefendorexcusethemandmanywilljointocriticizetheirwrongdoings.Theseshouldchangethisbadhabitandbepleasedwithwhatispleasingwithoutworryingneedlesslyaboutthemselvesandothers.Iftheydonotitwillbegoodforotherstoavoidanycontactwiththem.Otherwiseitcanbedisagreeableandsometimesveryinconvenientespeciallywhenonebecomesmixedupintheirquarrels. Wecanconcludefromthepassagethat.
HowtoprotectchildrenWebfansfromunsuitablematerialon-linewhileencouragingthemtousetheInternethaslongbeendiscussedintheUS.ForsomeparentstheInternetcanseemlikeajunglefilledwithdangerfortheirchildren.ButjunglescontainwondersaswellasdangersandwithgoodguidessomeeducationandafewprecautionsthewildsoftheInternetcanbesafelynavigated.Kidshavetobeon-line.Ifwetellourkidstheycan’thaveaccesstotheInternetwe’recuttingthemofffromtheirfuturesaidanexpert.Mostkidshavestartedtousesearchengines.ManyofthemaregreatforfindingtonsofinterestingInternetsitesandtheycanalsolocateplaceswhereyoumightnotwantyourkidstogo.Therearesearchenginesdesignedjustforkids.Acertainsoftwarecontainsonlysitesthathavebeenselectedassafe.Themostpopularwaytolimitaccesswouldbetousewhatisknownasacontentscreener.Butthiscan’tbewhollyreliableandthebestthingparentscandoistotalktotheirkidsandletthemknowwhatisOKornotOKtoseeordoontheInternet.AnotherwayisthatmumordadisnearbywhenthechildissurfingtheInternet.Afewothertips·Don’tputthePCinachild’sroombutkeepitinanareawheremumordadcankeepaneyeonthings.ThatalsomakestheInternetmoreofafamilyactivity.·Askyourchildwhatheorshehasbeendoingandaboutanyfriendstheymakeon-line.·Tellyourchildnottogiveon-linestrangerspersonalinformationespeciallylikeaddressandphonenumber.·Andtellyourchildrennevertotalktoanyonetheymeeton-lineoverthephonesendthemanythingacceptanythingfromthemoragreetomeetwiththemunlessyougoalong.Thebestwaytoprotectchildrenfromimpropermaterialis______.
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WhenDavewaseighteenheboughtasecondhandcarfor200sothathecouldtraveltoandfromworkmore1thanbybus.Itworkedquitewellforafewyearsbutthenitgotsooldanditwascostinghim2muchinrepairsthathedecidedthathehadbetter3it. Heaskedamonghisfriendstoseeifanyonewasparticularly4tobuyacheapcarbuttheyallknewthatitwasfallingtopiecesso5ofthemhadanydesiretobuyit.Dave’sfriendSamsawthathewas6whentheymetoneeveningandsaid"What’s7Dave" DavetoldhimandSamanswered"WellwhataboutadvertisingitinthepaperYoumay8moreforitthatwaythanthecostoftheadvertisement!"ThinkingthatSam’s9wassensibleheputanadvertisementinaneveningpaperwhichread"Forsale:smallcar10verylittlepetrolonlytwoowners.Bargainat50."Fortwodaysaftertheadvertisementfirstappearedtherewasno11.ButthenonSaturdayeveninghehadanenquiry.Amanrangupandsaidhewouldliketo12himaboutthecar."Allright"Davesaidfeelinghappy.Heaskedthemanwhetherteno’clockthenextmorningwouldbe13ornot."Fine"themansaid"andI’ll14mywife.Weintendtogoforarideinitto15it." ThenextmorningataquartertotenDaveparkedthecarinthesquareoutsidehisfrontdoor16towaitthereforthepeoplewhohad17hisadvertisement.EvenDavehadto18thatthecarreallylookedlikeawreck.Thensoonafterhehadgotthecarasclean19itcouldbeapolicecarstoppedjustbehindhimandapolicemangotout.HelookedatDave’scarandthensaid"Haveyoureportedthis20tousyetsir/ 9.
WhenDavewaseighteenheboughtasecondhandcarfor200sothathecouldtraveltoandfromworkmore1thanbybus.Itworkedquitewellforafewyearsbutthenitgotsooldanditwascostinghim2muchinrepairsthathedecidedthathehadbetter3it. Heaskedamonghisfriendstoseeifanyonewasparticularly4tobuyacheapcarbuttheyallknewthatitwasfallingtopiecesso5ofthemhadanydesiretobuyit.Dave’sfriendSamsawthathewas6whentheymetoneeveningandsaid"What’s7Dave" DavetoldhimandSamanswered"WellwhataboutadvertisingitinthepaperYoumay8moreforitthatwaythanthecostoftheadvertisement!"ThinkingthatSam’s9wassensibleheputanadvertisementinaneveningpaperwhichread"Forsale:smallcar10verylittlepetrolonlytwoowners.Bargainat50."Fortwodaysaftertheadvertisementfirstappearedtherewasno11.ButthenonSaturdayeveninghehadanenquiry.Amanrangupandsaidhewouldliketo12himaboutthecar."Allright"Davesaidfeelinghappy.Heaskedthemanwhetherteno’clockthenextmorningwouldbe13ornot."Fine"themansaid"andI’ll14mywife.Weintendtogoforarideinitto15it." ThenextmorningataquartertotenDaveparkedthecarinthesquareoutsidehisfrontdoor16towaitthereforthepeoplewhohad17hisadvertisement.EvenDavehadto18thatthecarreallylookedlikeawreck.Thensoonafterhehadgotthecarasclean19itcouldbeapolicecarstoppedjustbehindhimandapolicemangotout.HelookedatDave’scarandthensaid"Haveyoureportedthis20tousyetsir/ 3.
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Therearetwotypesofpeopleintheworld.Althoughtheyhaveequaldegreeofhealthandwealthandothercomfortsoflifeonebecomeshappyandtheotherbecomesunhappy.Thisarisesfromthedifferentwaysinwhichtheyconsiderthingspersonseventsandtheresultingeffectsupontheirminds. Peoplewhoaretobehappyfixtheirattentionontheconvenienceofthings;thepleasantpartsofconversationthewellprepareddishesthegoodnessofthewineandthefineweather.Theyenjoyallthecheerfulthings.Thosewhoaretobeunhappythinkandspeakonlyoftheoppositethings.Thereforetheyarecontinuallydissatisfied.Bytheirremarkstheysourthepleasureofsocietyoffendhurtmanypeopleandmakethemselvesdisagreeableeverywhere.Ifthisturnofmindwasfoundedinnaturesuchunhappypersonswouldbethemoretobepitied.Theintentionofcriticizingandbeingdislikedisperhapstakenupbyimitation.Itgrowsintoahabitunknowntoitspossessors.Thehabitmaybestrongbutitmaybecuredwhenthosewhohaveitrealizeitsbadeffectsontheirinterestsandtastes.Ihopethislittlewarningmayheofservicetothemandhelpthemchangethishabit. Althoughinfactitischieflyanactoftheimaginationithasseriousresultsinlifesinceitbringsondeepsorrowandbadluck.Thosepeopleoffendmanyothers;nobodylovesthemandnoonetreatsthemwithmorethanthemostcommonpolitenessandrespect.Thisfrequentlyputstheminbadtemperanddrawsthemintoarguments.Iftheyaimatgettingsomeadvantagesinsocialpositionorfortunenobodywishesthemsuccess.Norwillanyonestartasteporspeakawordtofavortheirhopes.Iftheybringonthemselvespublicobjectionsnoonewilldefendorexcusethemandmanywilljointocriticizetheirwrongdoings.Theseshouldchangethisbadhabitandbepleasedwithwhatispleasingwithoutworryingneedlesslyaboutthemselvesandothers.Iftheydonotitwillbegoodforotherstoavoidanycontactwiththem.Otherwiseitcanbedisagreeableandsometimesveryinconvenientespeciallywhenonebecomesmixedupintheirquarrels. Peoplewhoareunhappy.
WhenDavewaseighteenheboughtasecondhandcarfor200sothathecouldtraveltoandfromworkmore1thanbybus.Itworkedquitewellforafewyearsbutthenitgotsooldanditwascostinghim2muchinrepairsthathedecidedthathehadbetter3it. Heaskedamonghisfriendstoseeifanyonewasparticularly4tobuyacheapcarbuttheyallknewthatitwasfallingtopiecesso5ofthemhadanydesiretobuyit.Dave’sfriendSamsawthathewas6whentheymetoneeveningandsaid"What’s7Dave" DavetoldhimandSamanswered"WellwhataboutadvertisingitinthepaperYoumay8moreforitthatwaythanthecostoftheadvertisement!"ThinkingthatSam’s9wassensibleheputanadvertisementinaneveningpaperwhichread"Forsale:smallcar10verylittlepetrolonlytwoowners.Bargainat50."Fortwodaysaftertheadvertisementfirstappearedtherewasno11.ButthenonSaturdayeveninghehadanenquiry.Amanrangupandsaidhewouldliketo12himaboutthecar."Allright"Davesaidfeelinghappy.Heaskedthemanwhetherteno’clockthenextmorningwouldbe13ornot."Fine"themansaid"andI’ll14mywife.Weintendtogoforarideinitto15it." ThenextmorningataquartertotenDaveparkedthecarinthesquareoutsidehisfrontdoor16towaitthereforthepeoplewhohad17hisadvertisement.EvenDavehadto18thatthecarreallylookedlikeawreck.Thensoonafterhehadgotthecarasclean19itcouldbeapolicecarstoppedjustbehindhimandapolicemangotout.HelookedatDave’scarandthensaid"Haveyoureportedthis20tousyetsir/ 7.
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Solongasteachersfailtodistinguishdifferbetweenteachingandlearningtheywillcontinuetoundertaketodoforchildrenthatwhichonlychildrencandoforthemselves.Teachingchildrentoreadisnotpassingreadingontothem.Itiscertainlynotendlesshoursspentinactivitiesaboutreading.Douglasinsiststhat"readingcannotbetaughtdirectlyandschoolsshouldstoptryingtodotheimpossible". Teachingandlearningaretwoentirelydifferentprocesses.Theydifferinkindandfunction.Thefunctionofteachingistocreatetheconditionsandtheclimatethatwillmakeitpossibleforchildrentoplancleverlythemostefficientsystemforteachingthemselvestoread.Teachingisalsoapublicactivity.Itcanbeseenandobserved. Learningtoreadinvolvesallthateachindividualdoestounderstandtheworldofprintedlanguage.Almostallofitisprivateforlearningisanoccupationofthemindandthatprocessisnotopentopublicscrutiny. IfteacherandlearnerrolesarenotinterchangeablewhatthencanbedonethroughteachingthatwillaidthechildinthelongsearchforknowledgeSmithhasoneprincipleruleforallteachinginstructions."Makelearningtoreadeasywhichmeansmakingreadingameaningfulenjoyableandfrequentexperienceforchildren." Whentherolesofteacherandlearnerareseenforwhattheyareandwhenbothteacherandlearnerfulfillthemproperlythenmuchofthepressureandfeelingoffailureforbothisgotridof.Learningtoreadismadeeasierwhenteacherscreateanenvironmentwherechildrenaregiventhechancetosolvetheproblemoflearningtoreadbylearning. Themainideaofthepassageisthat.
WhenDavewaseighteenheboughtasecondhandcarfor200sothathecouldtraveltoandfromworkmore1thanbybus.Itworkedquitewellforafewyearsbutthenitgotsooldanditwascostinghim2muchinrepairsthathedecidedthathehadbetter3it. Heaskedamonghisfriendstoseeifanyonewasparticularly4tobuyacheapcarbuttheyallknewthatitwasfallingtopiecesso5ofthemhadanydesiretobuyit.Dave’sfriendSamsawthathewas6whentheymetoneeveningandsaid"What’s7Dave" DavetoldhimandSamanswered"WellwhataboutadvertisingitinthepaperYoumay8moreforitthatwaythanthecostoftheadvertisement!"ThinkingthatSam’s9wassensibleheputanadvertisementinaneveningpaperwhichread"Forsale:smallcar10verylittlepetrolonlytwoowners.Bargainat50."Fortwodaysaftertheadvertisementfirstappearedtherewasno11.ButthenonSaturdayeveninghehadanenquiry.Amanrangupandsaidhewouldliketo12himaboutthecar."Allright"Davesaidfeelinghappy.Heaskedthemanwhetherteno’clockthenextmorningwouldbe13ornot."Fine"themansaid"andI’ll14mywife.Weintendtogoforarideinitto15it." ThenextmorningataquartertotenDaveparkedthecarinthesquareoutsidehisfrontdoor16towaitthereforthepeoplewhohad17hisadvertisement.EvenDavehadto18thatthecarreallylookedlikeawreck.Thensoonafterhehadgotthecarasclean19itcouldbeapolicecarstoppedjustbehindhimandapolicemangotout.HelookedatDave’scarandthensaid"Haveyoureportedthis20tousyetsir/ 11.
WhenDavewaseighteenheboughtasecondhandcarfor200sothathecouldtraveltoandfromworkmore1thanbybus.Itworkedquitewellforafewyearsbutthenitgotsooldanditwascostinghim2muchinrepairsthathedecidedthathehadbetter3it. Heaskedamonghisfriendstoseeifanyonewasparticularly4tobuyacheapcarbuttheyallknewthatitwasfallingtopiecesso5ofthemhadanydesiretobuyit.Dave’sfriendSamsawthathewas6whentheymetoneeveningandsaid"What’s7Dave" DavetoldhimandSamanswered"WellwhataboutadvertisingitinthepaperYoumay8moreforitthatwaythanthecostoftheadvertisement!"ThinkingthatSam’s9wassensibleheputanadvertisementinaneveningpaperwhichread"Forsale:smallcar10verylittlepetrolonlytwoowners.Bargainat50."Fortwodaysaftertheadvertisementfirstappearedtherewasno11.ButthenonSaturdayeveninghehadanenquiry.Amanrangupandsaidhewouldliketo12himaboutthecar."Allright"Davesaidfeelinghappy.Heaskedthemanwhetherteno’clockthenextmorningwouldbe13ornot."Fine"themansaid"andI’ll14mywife.Weintendtogoforarideinitto15it." ThenextmorningataquartertotenDaveparkedthecarinthesquareoutsidehisfrontdoor16towaitthereforthepeoplewhohad17hisadvertisement.EvenDavehadto18thatthecarreallylookedlikeawreck.Thensoonafterhehadgotthecarasclean19itcouldbeapolicecarstoppedjustbehindhimandapolicemangotout.HelookedatDave’scarandthensaid"Haveyoureportedthis20tousyetsir/ 5.
IndustrialpollutionisnotonlyaproblemforthecountriesofEuropeandNorthAmericabutalsoanextremelyseriousprobleminsomedevelopingcountries.Forthesecountrieseconomicgrowthisaveryimportantaim.Theywanttointroduceindustriesandsotheyputfewcontrolsontheindustrieswhichcausepollution.Cubataoanindustrialtownof85000peopleinBrazilisanexampleoftheconnectionbetweenindustrialdevelopmentandpollution.In1954Cubataohadnoindustry.Todayithasmorethantwentylargefactorieswhichproducemanypollutants.Thepeopleofthetownaresufferingfromthepoisonousmatterintheirenvironmentandthebadeffectscanbeclearlyseen.Birthshortcomingsareextremelycommon.AmongchildrenandadultslungproblemsaresometimestwelvetimesmorecommoninCubataothaninotherplaces.ItistruethatBrazillikemanyothercountrieshaslawsagainstpollutionbuttheselawsarenotenforcedstrictlyenough.Itischeaperforcompaniestotakenonoticeofthelawsandpaythefinesthantobuytheexpensiveequipmentthatwillreducethepollution.Itisclearthereforethateconomicgrowthismoreimportanttothegovernmentthantothehealthoftheworkers.HowevertheresponsibilitydoesnotcompletelyliewiththeBraziliangovernment.TheexampleofCubataoshowsthatinternationalcompaniesarenotactinginaresponsiblewayeither.AnumberofthefactoriesinthetownareownedbylargecompaniesfromFranceItalyandtheUS.TheyaredoingthingsinBrazilthattheywouldnotbeabletodoathome.Iftheycausedthesameamountofpollutionathometheywouldbeseverelypunishedorevenputoutofbusiness.WhydosomeforeigncompaniesliketosetuptheirplantsinBrazil
Mrs.HuaskedLiuFangand______totakepartintheEnglishmeeting.
教师应如何适应现代社会发展对英语课程的要求
Syntaxisthestudyof______.
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