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若集合A=x|-2≤x≤3,B=x|x<-1或x>4,则集合A∩B等于( )
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设fx→ax﹣1为从集合A到集合B的映射若f2=3则f3=
5
4
3
2
设集合A.={x|x2-3x+2=0}B.={x|x2-ax+a-1=0}若A.∩B.=B.求实数a
已知集合
={x|ax
2
+2x+a=0,a∈R.},若集合A.有且仅有2个子集,则实数a的取值是( ) A.1
0,1
-1, 1
-1,0,1
已知集合A.={x|ax2+2x+a=0a∈R.}若集合A.有且仅有2个子集则a的取值构成的集合为_
设集合A为函数y=ln﹣x2﹣2x+8的定义域集合B为函数y=x+x>﹣2的值域集合C为不等式ax﹣
已知二次函数fx=ax2+x有最小值不等式fx
已知fx=x2-ax+bab∈R.A.={x∈R|fx-x=0}B.={x∈R|fx-ax=0}若A
已知集合A.={x∈R|ax2-3x+2=0}.1若A.是空集求实数a的取值范围2若A.是单元素集求
设fx→ax-1为从集合A.到集合B.的映射若f2=3则f3=________.
已知二次函数fx=ax2+x若对任意x1x2∈R.恒有成立不等式的解集为A.1求集合A.2设集合若集
已知集合A.={x||x-1|≤1}B={x|x2-4ax+3a2≤0a≥0}.1当a=1时求集合A
已知集合A.={x|x2=4}B.={x|ax=2}.若B.⊆A.则实数a的取值集合是_______
设xy∈R集合A={xy|ax+by+1=0}B={xy|x2+y2=1}且A∩B是一个单元素集合若
已知a是实数若集合{x|ax=1}是任何集合的子集则a的值是.
已知集合A={x|ax2+ax+6=0}.1若1∈A求集合A2若集合A{23}求实数a的取值范围.
设集合A={x丨﹣2≤x<4}B={x丨x2﹣ax﹣4≤0}若B⊆
,则实数a的取值范围为 ( ) A.[﹣1,2]
[﹣1,2)
[0,3)
[0,3]
若集合
={x∈R|ax2+ax+1=0}其中只有一个元素,则a=( ) A.4
2
0
0或4
写出下列命题的否定和否命题:1若x2+y2=0则xy全为0;2若x=2或x=-1则x2-x-2=0;
已知集合A.={x∈R|ax2-3x+2=0}若集合A.中有两个元素求实数a取值范围的集合.
已知二次函数fx=ax2+x有最小值不等式fx
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Iwouldalmostratherseeyoudead.BobertS.CassattaleadingbankerofPhiladelphiashoutedwhenhistwenty-year-oldeldestdaughterannouncedthatshewantedtobecomeanartist.Inthe19thcenturyplayingatdrawingorpaintingondisheswasallrightforayoungladybutseriousworkinartwasnot.Andwhentheyounglady’sfamilyrackedamongthebestofPhiladelphia’ssocialfamiliessuchanideacouldnotevenbeconsidered.ThatwashowMaryCassattborn1844beganherstruggleasanartist.Shedidnottremblebeforeherfather’sangersheopposedhimwithcourageandatlastmadehimchangehismind.MaryCassattgaveuphersocialpositionandallthoughtsofathousandandafamilywhichinthosetimeswasunthinkableforayounglady.IntheendafterlongyearsofhardworkandperseveranceshebecameAmerica’smostimportantwomanartistandtheinternationallyrecognizedleadingwomanpainterofthetime.WhatinfactwasMrCassatt’smainreasoninopposinghisdaughter’swish
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/ 19.
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.
Europeanfootballisplayedin80countriesitthemostpopularsportintheworld.
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.
Syntaxisthestudyof______.
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.
Ifyouoftenfeeltiredandthedoctorcan’tfindanythingwrongwithyouyoumaybeinastateofSubhealth亚健康.Subhealthisastatebetweenhealthandillness.Mostofthesubhealthypeoplearemiddle-agedoneswhoareusuallystressedoutbecauseofworkandfamily.Andsomeofthemarestudentswhoarehavingexams.Ifyouaresubheahltyitisnotdifficultforyoutobecomewellsoon.Youshouldhavegoodlivinghabits.Forexampleyoushouldgetupearlyandgotobedearly.Andyoushouldexerciseregularly.Exercisingcankeepyouhealthy.Asformealsitisbettertoeatlesssaltandsugar.Vegetablesfruitandfishareimportanttoyourbody.Youshouldeatmoreofthem.Itisnotgoodtoeattoomuchatonemealbecauseitmaycauseunhealthychangesinthedigestivetract消化道.Andatlastabalanceddietisveryhelpfulinstayingawayfromsubhealth.Whatisthemainideaofthepassage
Achildwhohasoncebeenpleasedwithatalelikesasaruletohaveitretoldinalmostthesamewordsbutthisshouldnotleadparentstotreatprintedfairystoriesasformaltexts.Itisalwaysmuchbettertotellastorythanreaditoutofabookandifaparentcanproducewhatintheactualsituationofthetimeandthechildisanimprovementontheprintedtextsomuchthebetter. Achargemadeagainstfairytalesisthattheyharmthechildbyfrighteninghimormakinghimsadthinking.Toprovethelatteronewouldhavetoshowinacontrolledexperimentthatchildrenwhohavereadfairystoriesweremoreoftensorryforcrueltythanthosewhohadnot.AstofearsthereareIthinksomecasesofchildrenbeingdangerouslyterrifiedbysomefairystory.Oftenhoweverthisarisesfromthechildhavingheardthestoryonce.Familiaritywiththestorybyrepetitionturnsthepainoffearintothepleasureofafearfacedandmastered.Therearealsopeoplewhoobjecttofairystoriesonthegroundsthattheyarenotobjectivelytruethatgiantswitchestwo-headeddragonsmagiccarpetsetc.donotexist;andthatinsteadofbeingfondofthestrangesideinfairytalesthechildshouldbetaughttolearntherealitybystudyinghistory.IfindsuchpeopleImustsaysopeculiarthatIdonotknowhowtoarguewiththem.IftheircaseweresoundtheworldshouldbefullofmadmenattemptingtoflyfromNewYorktoPhiladelphiaonastickorcoveringatelephonewithkissesinthebeliefthatitwastheirbelovedgirl-friend.Nofairystoryeverdeclaredtobeadescriptionoftherealworldandnocleverchildhaseverbelievedthatitwas. Oneofthereasonswhysomepeoplearenotinfavoroffairytalesisthat.
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.
Mrs.HuaskedLiuFangand______totakepartintheEnglishmeeting.
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/ 15.
Wehadareallybadtimeaboutsixmonthsagobutnowthingsare.
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.
Somespidershuntonthegroundothersbuildwebstotraptheirfoodbutthegrasswaterspidercatchesitspreybyrunningalongthesurfaceofthewater.Thisspecialwaterspiderlivesonthegrassybanksofstreamswheremosquitoesdamselfliesandotherinsectscometofeedandbreed.AlthoughitisoneofthelargestspidersinNewZealandithasanunusualability.Itdoesn’tdisturbthewaterasitwaitsforitsmealandthereisbarelyaripplewhenitskimsacrossthesurfaceatlightningspeedtocatchitsprey.Grasswaterspidersdealswiftlywithlargerinsectslikedamselfliesbypullingtheirheadsunderthewaterandholdingthemthereuntiltheydrown.Afteramealthegrasswaterspiderspendsuptohalfanhourgroomingitself.Itwipesitseighteyesbrushesitsantennaeandtakesspecialcaretocleanthehairsonitsbody.Itisthehairsthattraptinybubblesofairsothatthespidercanrundownabladeofgrassandstayunderwaterforuptoanhourwhenitisfrightened.Thehairsalsokeepthespiderdryevenunderwater.Itisonlywhenthefemalespideriscaringfortheyoungthatshedoesnothuntonthewater.Aftermatingsheproducesalargeeggsacwhichshecarriesaroundforfiveweeks.Oncetheeggsstarttohatchsheattachesthesactosomebladesofgrassorathistle.Shethentearsthesacopenandreleasesthetinyspidersintothenurseryweb.Thewriterdescribesthespecialspiderasspecialbecause______.
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.
Withalotofdifficultproblemsthemanagerfeltworriedallthetime.
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.
Achildwhohasoncebeenpleasedwithatalelikesasaruletohaveitretoldinalmostthesamewordsbutthisshouldnotleadparentstotreatprintedfairystoriesasformaltexts.Itisalwaysmuchbettertotellastorythanreaditoutofabookandifaparentcanproducewhatintheactualsituationofthetimeandthechildisanimprovementontheprintedtextsomuchthebetter. Achargemadeagainstfairytalesisthattheyharmthechildbyfrighteninghimormakinghimsadthinking.Toprovethelatteronewouldhavetoshowinacontrolledexperimentthatchildrenwhohavereadfairystoriesweremoreoftensorryforcrueltythanthosewhohadnot.AstofearsthereareIthinksomecasesofchildrenbeingdangerouslyterrifiedbysomefairystory.Oftenhoweverthisarisesfromthechildhavingheardthestoryonce.Familiaritywiththestorybyrepetitionturnsthepainoffearintothepleasureofafearfacedandmastered.Therearealsopeoplewhoobjecttofairystoriesonthegroundsthattheyarenotobjectivelytruethatgiantswitchestwo-headeddragonsmagiccarpetsetc.donotexist;andthatinsteadofbeingfondofthestrangesideinfairytalesthechildshouldbetaughttolearntherealitybystudyinghistory.IfindsuchpeopleImustsaysopeculiarthatIdonotknowhowtoarguewiththem.IftheircaseweresoundtheworldshouldbefullofmadmenattemptingtoflyfromNewYorktoPhiladelphiaonastickorcoveringatelephonewithkissesinthebeliefthatitwastheirbelovedgirl-friend.Nofairystoryeverdeclaredtobeadescriptionoftherealworldandnocleverchildhaseverbelievedthatitwas. Theadvantageclaimedforrepeatingfairystoriestoyoungchildrenisthatit.
Iwouldalmostratherseeyoudead.BobertS.CassattaleadingbankerofPhiladelphiashoutedwhenhistwenty-year-oldeldestdaughterannouncedthatshewantedtobecomeanartist.Inthe19thcenturyplayingatdrawingorpaintingondisheswasallrightforayoungladybutseriousworkinartwasnot.Andwhentheyounglady’sfamilyrackedamongthebestofPhiladelphia’ssocialfamiliessuchanideacouldnotevenbeconsidered.ThatwashowMaryCassattborn1844beganherstruggleasanartist.Shedidnottremblebeforeherfather’sangersheopposedhimwithcourageandatlastmadehimchangehismind.MaryCassattgaveuphersocialpositionandallthoughtsofathousandandafamilywhichinthosetimeswasunthinkableforayounglady.IntheendafterlongyearsofhardworkandperseveranceshebecameAmerica’smostimportantwomanartistandtheinternationallyrecognizedleadingwomanpainterofthetime.WhatdoweknowaboutMaryCassatt’smarriage
WantaglanceofthefutureofhealthcareTakealookatthewaythevariousnetworksofpeopleaboutpatientcarearebeingconnectedtooneanotherandhowthisnewconnectivityisbeingexploitedtodelivermedicinetothepatient—nomatterwhereheorshemaybe.Onlinedoctorsofferingadvicebasedonnormalsymptomsarethemostobviousexample.Increasinglyhoweverremotediagnosiswillbebasedonrealphysiologicaldatafromtheactualpatient.AgroupfromtheUniversityofKentuckyhasshownthatbyusingpersonaldataassistanceplusamobilephoneitisperfectlypracticaltosendapatient’simportantsignsoverthetelephone.Withthiskindofequipmentthecryaskingwhethertherewasadoctorinthehousecouldwellbeathingofthepast.Othermedicaltechnologygroupsareworkingonapplyingtelemedicinetoruralcountrysidecare.Andatleastoneteamwantstousetelemedicineasatoolfordisasterneed—especiallyafterearthquakes.Onthewholethetrendistowardsprovidingglobalaccesstomedicaldataandexperts’opinions.Butthereisoneproblem.Bandwidthisthelimitingfactorforsendingcomplexmedicalpicturesaroundtheworld—CTphotosbeingoneofthebiggestbandwidthusers.Communicationsatellitesmaybeabletodealwiththeshort-termneedsduringdisasterssuchasearthquakesorwars.Butmedicineislookingtowardsboththesecond-generationInternetandthird-generationmobilephonesforthefutureofremotemedicalservice.Doctorshavemettodiscusscomputer-basedtoolsformedicaldiagnosistrainingandtelemedicine.Withthefallingpriceofbroadbandcommunicationsthenewtechnologiesshouldstartanewtimewhentelemedicineandthesharingofmedicalinformationexperts’opinionsanddiagnosisarecommon.Theprobleminthefourthparagraphreferstothefactthat______.
教育学
WantaglanceofthefutureofhealthcareTakealookatthewaythevariousnetworksofpeopleaboutpatientcarearebeingconnectedtooneanotherandhowthisnewconnectivityisbeingexploitedtodelivermedicinetothepatient—nomatterwhereheorshemaybe.Onlinedoctorsofferingadvicebasedonnormalsymptomsarethemostobviousexample.Increasinglyhoweverremotediagnosiswillbebasedonrealphysiologicaldatafromtheactualpatient.AgroupfromtheUniversityofKentuckyhasshownthatbyusingpersonaldataassistanceplusamobilephoneitisperfectlypracticaltosendapatient’simportantsignsoverthetelephone.Withthiskindofequipmentthecryaskingwhethertherewasadoctorinthehousecouldwellbeathingofthepast.Othermedicaltechnologygroupsareworkingonapplyingtelemedicinetoruralcountrysidecare.Andatleastoneteamwantstousetelemedicineasatoolfordisasterneed—especiallyafterearthquakes.Onthewholethetrendistowardsprovidingglobalaccesstomedicaldataandexperts’opinions.Butthereisoneproblem.Bandwidthisthelimitingfactorforsendingcomplexmedicalpicturesaroundtheworld—CTphotosbeingoneofthebiggestbandwidthusers.Communicationsatellitesmaybeabletodealwiththeshort-termneedsduringdisasterssuchasearthquakesorwars.Butmedicineislookingtowardsboththesecond-generationInternetandthird-generationmobilephonesforthefutureofremotemedicalservice.Doctorshavemettodiscusscomputer-basedtoolsformedicaldiagnosistrainingandtelemedicine.Withthefallingpriceofbroadbandcommunicationsthenewtechnologiesshouldstartanewtimewhentelemedicineandthesharingofmedicalinformationexperts’opinionsanddiagnosisarecommon.Thebasisofremotediagnosiswillbe______.
Ifyouoftenfeeltiredandthedoctorcan’tfindanythingwrongwithyouyoumaybeinastateofSubhealth亚健康.Subhealthisastatebetweenhealthandillness.Mostofthesubhealthypeoplearemiddle-agedoneswhoareusuallystressedoutbecauseofworkandfamily.Andsomeofthemarestudentswhoarehavingexams.Ifyouaresubheahltyitisnotdifficultforyoutobecomewellsoon.Youshouldhavegoodlivinghabits.Forexampleyoushouldgetupearlyandgotobedearly.Andyoushouldexerciseregularly.Exercisingcankeepyouhealthy.Asformealsitisbettertoeatlesssaltandsugar.Vegetablesfruitandfishareimportanttoyourbody.Youshouldeatmoreofthem.Itisnotgoodtoeattoomuchatonemealbecauseitmaycauseunhealthychangesinthedigestivetract消化道.Andatlastabalanceddietisveryhelpfulinstayingawayfromsubhealth.Howmayyoufeelifyou’resubhealthy
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/ 17.
Ifyouoftenfeeltiredandthedoctorcan’tfindanythingwrongwithyouyoumaybeinastateofSubhealth亚健康.Subhealthisastatebetweenhealthandillness.Mostofthesubhealthypeoplearemiddle-agedoneswhoareusuallystressedoutbecauseofworkandfamily.Andsomeofthemarestudentswhoarehavingexams.Ifyouaresubheahltyitisnotdifficultforyoutobecomewellsoon.Youshouldhavegoodlivinghabits.Forexampleyoushouldgetupearlyandgotobedearly.Andyoushouldexerciseregularly.Exercisingcankeepyouhealthy.Asformealsitisbettertoeatlesssaltandsugar.Vegetablesfruitandfishareimportanttoyourbody.Youshouldeatmoreofthem.Itisnotgoodtoeattoomuchatonemealbecauseitmaycauseunhealthychangesinthedigestivetract消化道.Andatlastabalanceddietisveryhelpfulinstayingawayfromsubhealth.Whatshouldyoudoifyouaresubhealthy
—HowaboutyourjourneytoMountEmei—Everythingwaswonderfulexceptthatourcar______twiceontheway.
—Shewaslatefortheparty. —That's shehadforgottentheexacttime.
Achildwhohasoncebeenpleasedwithatalelikesasaruletohaveitretoldinalmostthesamewordsbutthisshouldnotleadparentstotreatprintedfairystoriesasformaltexts.Itisalwaysmuchbettertotellastorythanreaditoutofabookandifaparentcanproducewhatintheactualsituationofthetimeandthechildisanimprovementontheprintedtextsomuchthebetter. Achargemadeagainstfairytalesisthattheyharmthechildbyfrighteninghimormakinghimsadthinking.Toprovethelatteronewouldhavetoshowinacontrolledexperimentthatchildrenwhohavereadfairystoriesweremoreoftensorryforcrueltythanthosewhohadnot.AstofearsthereareIthinksomecasesofchildrenbeingdangerouslyterrifiedbysomefairystory.Oftenhoweverthisarisesfromthechildhavingheardthestoryonce.Familiaritywiththestorybyrepetitionturnsthepainoffearintothepleasureofafearfacedandmastered.Therearealsopeoplewhoobjecttofairystoriesonthegroundsthattheyarenotobjectivelytruethatgiantswitchestwo-headeddragonsmagiccarpetsetc.donotexist;andthatinsteadofbeingfondofthestrangesideinfairytalesthechildshouldbetaughttolearntherealitybystudyinghistory.IfindsuchpeopleImustsaysopeculiarthatIdonotknowhowtoarguewiththem.IftheircaseweresoundtheworldshouldbefullofmadmenattemptingtoflyfromNewYorktoPhiladelphiaonastickorcoveringatelephonewithkissesinthebeliefthatitwastheirbelovedgirl-friend.Nofairystoryeverdeclaredtobeadescriptionoftherealworldandnocleverchildhaseverbelievedthatitwas. Theauthorconsidersthatafairystoryismoreeffectivewhenitis.
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