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椭圆的左焦点为F1,右焦点为F2点P在椭圆上,如果线段PF1的中点在y轴上,那么|PF1|是|PF2|的()
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已知点F1F2是椭圆+=1a>b>0的左右焦点在此椭圆上存在点P.使∠F1PF2=60°且|PF1|
设椭圆的左右焦点分别为F1F2右顶点为A上定点为B已知 设P为椭圆上异于其顶点的一点以线段
椭圆+=1的焦点为F1F2点P.在椭圆上.若|PF1|=4则|PF2|=________∠F1PF2
椭圆x2/12+y2/3=1的焦点为F1和F2点P.在椭圆上如果线段PF1的中点在y轴上那么|PF1
7倍
5倍
4倍
3倍
已知m>1直线x-my-m2/2=0椭圆C://x2/m2+y2=1F1F2分别为椭圆C的左右焦点.
椭圆+=1的焦点为F1和F2点P.在椭圆上如果线段PF1的中点在y轴上那么|PF1|是|PF2|的
7倍
5倍
4倍
3倍
P.是椭圆上一点F.1F.2分别是椭圆的左右焦点若|PF1|·|PF2|=12则∠F.1PF2的大小
30°
60°
120°
150°
已知椭圆C.=1a>b>0的离心率为且经过点1F1F2是椭圆的左右焦点.1求椭圆C.的方程2点P.在
椭圆+=1的焦点为F.1F2点P.在椭圆上若PF1=4则∠F.1PF2的大小为.
已知椭圆的左右焦点分别是F1F2P.是椭圆上一点若|PF1|=3|PF2|则点P.到左准线的距离是
2
4
6
8
已知椭圆的左右焦点分别为F.1F.2点P.为椭圆上一点且∠PF1F.2=30°∠PF2F.1=60°
如图已知F1F2是椭圆C.a>b>0的左右焦点点P.在椭圆C.上线段PF2与圆相切于点Q.且点Q.为
如图已知F1为椭圆的左焦点A.B.分别为椭圆的右顶点和上顶点P.为椭圆上的点.若PF1⊥F1APO∥
如图已知F1F2是椭圆C.a>b>0的左右焦点点P.在椭圆C.上线段PF2与圆相切于点Q.且点Q.为
已知F1F2是椭圆C.的左右焦点点P.在椭圆上且满足PF1=2PF2∠PF1F2=30°则椭圆的离心
已知F1F2分别是椭圆C.的左右焦点点P.在椭圆上且满足PF1=2PF2∠PF1F2=30°则椭圆的
设椭圆的左右焦点分别为F1F2右顶点为A上定点为B已知 求椭圆的离心率
已知F1F2分别为椭圆=1a>b>0左右焦点点P1y0在椭圆上且PF2⊥x轴△PF1F2的周长为61
已知F是椭圆的左焦点AB为椭圆C的左右顶点点P在椭圆C上且PF⊥x轴过点A的直线与线段PF交与点M
已知有公共焦点的椭圆与双曲线的中心为原点焦点在x轴上左右焦点分别为F.1F.2且它们在第一象限的交点
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C Statusesaremarveloushumaninventionsthatenableustogetalongwithoneanotherandtodeterminewherewe"fit"insociety.Aswegoaboutoureverydayliveswementallyattempttoplacepeopleintermoftheirstatuses.Forexamplewemustjudgewhetherthepeopleinlibraryisareaderoralibrarianwhetherthetelephonecallerisafriendorasalesmanwhethertheunfamiliarpersononourpropertyisathieforameterreaderandsoon. Thestatusesweassumeoftenvarywiththepeopleweencounterandchangethroughoutlife.Mostofuscanatveryhighspeedassumethestatusesthatvarioussituationsrequire.Muchofsocialinteractionconsistsofidentifyingandselectingamongappropriatestatusesandallowingotherpeopletoassumetheirstatusesinrelationtous.Thismeansthatwefitouractionstothoseofotherpeoplebasedonaconstantmentalprocessofappraisalandinterpretation.Althoughsomeofusfindthetaskmoredifficultthanothersmostofusperformitrathereffortlessly. Statuseshasbeencomparedtoready-madeclothes.Withincertainlimitsthebuyercanchoosestyleandfabric.ButanAmericanisnotfreetochoosethecostumeofaChinesepeasantorthatofaHinduprince.Wemustchoosefromamongtheclothingpresentedbyfitaswellasbyourpocket-boob.Havingmadeachoicefromminoradjustmentswetendtobelimitedtowhatthestoreschoiceamongthemislimited. Accordingtothewriterpeopleoftenassumedifferentstatuses
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C Statusesaremarveloushumaninventionsthatenableustogetalongwithoneanotherandtodeterminewherewe"fit"insociety.Aswegoaboutoureverydayliveswementallyattempttoplacepeopleintermoftheirstatuses.Forexamplewemustjudgewhetherthepeopleinlibraryisareaderoralibrarianwhetherthetelephonecallerisafriendorasalesmanwhethertheunfamiliarpersononourpropertyisathieforameterreaderandsoon. Thestatusesweassumeoftenvarywiththepeopleweencounterandchangethroughoutlife.Mostofuscanatveryhighspeedassumethestatusesthatvarioussituationsrequire.Muchofsocialinteractionconsistsofidentifyingandselectingamongappropriatestatusesandallowingotherpeopletoassumetheirstatusesinrelationtous.Thismeansthatwefitouractionstothoseofotherpeoplebasedonaconstantmentalprocessofappraisalandinterpretation.Althoughsomeofusfindthetaskmoredifficultthanothersmostofusperformitrathereffortlessly. Statuseshasbeencomparedtoready-madeclothes.Withincertainlimitsthebuyercanchoosestyleandfabric.ButanAmericanisnotfreetochoosethecostumeofaChinesepeasantorthatofaHinduprince.Wemustchoosefromamongtheclothingpresentedbyfitaswellasbyourpocket-boob.Havingmadeachoicefromminoradjustmentswetendtobelimitedtowhatthestoreschoiceamongthemislimited. Inthelastsentenceofthesecondparagraphthepronounitrefersto
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E Manypeoplebelievetheglarefromsnowcausessnowblindnenss.Yetdarkglassesornottheyfindthemselvessufferingfromheadachesandwateringeyesandevensnowblindnesswhenex-posedtoseveralhoursof"snowlight". TheUnitedStatesarmyhasnowdeterminedthatglarefromsnowdoesnotcausesnowblindnessintroopsinasnow-coveredcountry.Ratheraman’seyesfrequentlyfindnothingtofocusoninabroadexpanseofbarrensnow-coveredterrain.Sohisgazecontinuallyshiftsandjumpsbackandforthovertheentirelandscapeinsearchofsomethingtolookat.Findingnothinghourafterhourtheeyesneverstopsearchingandtheeyeballsbecomesoreandtheeyemusclesache.Natureoffsetsthisirritationbyproducingmoreandfluidwhichcoverstheeyeball.Thefluidcoverstheeyeballinincreasingquantityuntilvisionblursthenisobservedandtheresultistotaleventhoughtemporarysnowblindness. Experimentsledthearmytoasimplemethodofovercomingthisproblem.Scoutsaheadofamainbodyoftroopsaretrainedtoshakesnowfromevergreenbushescreatingadottedlineastheycrosscompletelysnow-coveredlandscape.Eventhescoutsthemselvesthrowlightweightdarkcoloredobjectsaheadonwhichtheytoocanfocus.Themenfollowingcanthenseesomething.Theirgazeisarrested.Theireyesfocusonabushandhavingfoundsomethingtoseestopscouringthesnow-blanketedlanscape.Byfocusingtheirattentionononeobjectatatimethemencancrossthesnowwithoutbecominghopelesslysnowblindorlost.Inthiswaytheproblemofcrossingasolidwhiteterrainisovercome. Thescoutsshakesnowfromevergreenbushesinorderto
"It’snouseMum"saidJohnny."I’mjustnogoodatdancing." "You’vegottokeeptrying.Tonightwillbe16dear.TryaturnwiththatprettyLisette." Johnny17EverySaturdaynightusedtobethebestoftheweek.Heandhisparentswenttothe18attheClubwherehisheroAlcideplayedtheaccordion手风琴withtheband.Butlatelyeverythinghadchanged.NowthatJohnnywasolderhewas19todancewithagirl! 20JohnnyandhisparentsarrivedattheClubmusichadalreadystarted.Johnnygotuphis21toapproachLisette.“MayIhavethisdance”Johnnyasked.“That’sallright”saidLisette.JohnnystruggledtokeepupwithLisette’s22stepsbuthewasalwaysonebeatbehindher.ThenJohnnyheardhisfriendPierresay"Look!Johnnyhastwoleftfeet!"23burstfromthecrowd.Johnny24andranoutsidedeterminednevertogotoanotherdance. ThenextSaturdayAlcide25toJohnny’shouseforsomepotatoes.HehappenedtohearJohnnyplayingtheaccordion.Alcide’seyes26"Bringthataccordionandplaysomesongsto-night"Alcidesaid.ThenhedroveoffleavingJohnnystaringopen-mouthed27him. AttheClubJohnnyscannedthecrowdforLisetteand28her.ThebandplayedforalongtimebeforeAlcidesaid"DearfriendsIgota29foryoutonight.YoungJohnnyisgoingtojoinus!"30Johnnysteppedupontheplatformhiseyesonthefloor.Hebegantoplayandtheband31behindhim.Whenthesongendedheheardcheers.Johnnykeptplayinguntilthedancewas32"Youdidafinejobtonight.PlaywithusagainnextSaturdaynight"Alcidesaid."Yessir!"saidJohnny.33hewentoutsideJohnnysawLisetteandherfriendsnearthedoor.Lisettestepped34smiling."Youplayedreallygoodtonight!"shesaid. "Thankyou"Johnnyblushed脸红.AshewalkedonPierre35movedoutofthewayforhimtopass. Johnnypattedhisaccordion.CometothinkofitinhiswholelifehehadneveronceseenAlcideoutonthedancefloor. 19
D Howshouldoneinvestasumofmoneyinthesedaysofinflation通货膨胀Leftinabankitwillhardlykeepitsvaluehoweverhightheinterestrateis.OnlyabravemanoraveryrichonedarestobuyandsellontheStockMarket.Todayitseemsthatoneofthebestwaystoprotectyoursavingsandevenincreaseyourwealthistobuybeautifulobjectsfromthepast.HereIamgoingtooffersomeadviceoncollectingantiqueclockswhichIpersonallyconsiderareamongthemostinterestingofantiques. Isometimeswonderwhatabeingfromanotherplanetmightreportbackaboutourwayoflife."TheplanetEarthisruledbyamysteriouscreaturethatsitsorstandsinaroomandmakesastrangetickingsound.Ithasafacewithtwelveblackmarksandtwohands.Mencandonothingwithoutitspermissionanditfastensitsyoungroundpeople’swristssothateverywheremengotheyarestillunderitscontrol.ThiscreatureistherealmasterofEarthandmenareitsslaves." Whetherornotweareslavesoftimetodaydependsonourcultureandpersonalitybutitisbelievedthatmanyyearsagokingskeptspecialslavestotellthetime.Certainmenwereverycleveratmeasuringthetimeofdayaccordingtothebeatingoftheirownhearts.Theyweremadetostandinafixedplaceandeveryhourorsowouldshoutthetime.Soitseemsthatthefirstclockswerehumanbeings. Howevermenquicklyfoundmoreconvenientandreliablewaysoftellingthetime.Theylearnedtousetheshadowscastbythesun.Theymarkedthehoursoncandlesusedsandinhour-glassesandinventedwater-clocks.Indeedanyseriousstudentofantiquesshouldspendasmuchtimeaspossiblevisitingpalacesstatelyhomesandmuseumstoseesomeofthefinestexamplesofclocksfromthepast. Antiqueclockscouldbeveryexpensivebutoneofthejoysofcollectingclocksisthatitisstillpossibletofindquitecheaponesforyourownhome.Afterallifyouaregoingtoberuledbythetimewhynotinvestinairantiqueclockandperhapsmakeafutureprofit WhichofthefollowingisNOTmentionedasawaytomeasurethetime
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"It’snouseMum"saidJohnny."I’mjustnogoodatdancing." "You’vegottokeeptrying.Tonightwillbe16dear.TryaturnwiththatprettyLisette." Johnny17EverySaturdaynightusedtobethebestoftheweek.Heandhisparentswenttothe18attheClubwherehisheroAlcideplayedtheaccordion手风琴withtheband.Butlatelyeverythinghadchanged.NowthatJohnnywasolderhewas19todancewithagirl! 20JohnnyandhisparentsarrivedattheClubmusichadalreadystarted.Johnnygotuphis21toapproachLisette.“MayIhavethisdance”Johnnyasked.“That’sallright”saidLisette.JohnnystruggledtokeepupwithLisette’s22stepsbuthewasalwaysonebeatbehindher.ThenJohnnyheardhisfriendPierresay"Look!Johnnyhastwoleftfeet!"23burstfromthecrowd.Johnny24andranoutsidedeterminednevertogotoanotherdance. ThenextSaturdayAlcide25toJohnny’shouseforsomepotatoes.HehappenedtohearJohnnyplayingtheaccordion.Alcide’seyes26"Bringthataccordionandplaysomesongsto-night"Alcidesaid.ThenhedroveoffleavingJohnnystaringopen-mouthed27him. AttheClubJohnnyscannedthecrowdforLisetteand28her.ThebandplayedforalongtimebeforeAlcidesaid"DearfriendsIgota29foryoutonight.YoungJohnnyisgoingtojoinus!"30Johnnysteppedupontheplatformhiseyesonthefloor.Hebegantoplayandtheband31behindhim.Whenthesongendedheheardcheers.Johnnykeptplayinguntilthedancewas32"Youdidafinejobtonight.PlaywithusagainnextSaturdaynight"Alcidesaid."Yessir!"saidJohnny.33hewentoutsideJohnnysawLisetteandherfriendsnearthedoor.Lisettestepped34smiling."Youplayedreallygoodtonight!"shesaid. "Thankyou"Johnnyblushed脸红.AshewalkedonPierre35movedoutofthewayforhimtopass. Johnnypattedhisaccordion.CometothinkofitinhiswholelifehehadneveronceseenAlcideoutonthedancefloor. 21
______thepolicethoughthewasthemostlikelyonesincetheyhadnoexactproofaboutittheycouldnotarresthim.
D Howshouldoneinvestasumofmoneyinthesedaysofinflation通货膨胀Leftinabankitwillhardlykeepitsvaluehoweverhightheinterestrateis.OnlyabravemanoraveryrichonedarestobuyandsellontheStockMarket.Todayitseemsthatoneofthebestwaystoprotectyoursavingsandevenincreaseyourwealthistobuybeautifulobjectsfromthepast.HereIamgoingtooffersomeadviceoncollectingantiqueclockswhichIpersonallyconsiderareamongthemostinterestingofantiques. Isometimeswonderwhatabeingfromanotherplanetmightreportbackaboutourwayoflife."TheplanetEarthisruledbyamysteriouscreaturethatsitsorstandsinaroomandmakesastrangetickingsound.Ithasafacewithtwelveblackmarksandtwohands.Mencandonothingwithoutitspermissionanditfastensitsyoungroundpeople’swristssothateverywheremengotheyarestillunderitscontrol.ThiscreatureistherealmasterofEarthandmenareitsslaves." Whetherornotweareslavesoftimetodaydependsonourcultureandpersonalitybutitisbelievedthatmanyyearsagokingskeptspecialslavestotellthetime.Certainmenwereverycleveratmeasuringthetimeofdayaccordingtothebeatingoftheirownhearts.Theyweremadetostandinafixedplaceandeveryhourorsowouldshoutthetime.Soitseemsthatthefirstclockswerehumanbeings. Howevermenquicklyfoundmoreconvenientandreliablewaysoftellingthetime.Theylearnedtousetheshadowscastbythesun.Theymarkedthehoursoncandlesusedsandinhour-glassesandinventedwater-clocks.Indeedanyseriousstudentofantiquesshouldspendasmuchtimeaspossiblevisitingpalacesstatelyhomesandmuseumstoseesomeofthefinestexamplesofclocksfromthepast. Antiqueclockscouldbeveryexpensivebutoneofthejoysofcollectingclocksisthatitisstillpossibletofindquitecheaponesforyourownhome.Afterallifyouaregoingtoberuledbythetimewhynotinvestinairantiqueclockandperhapsmakeafutureprofit Thepurposeofthepassageis
E Manypeoplebelievetheglarefromsnowcausessnowblindnenss.Yetdarkglassesornottheyfindthemselvessufferingfromheadachesandwateringeyesandevensnowblindnesswhenex-posedtoseveralhoursof"snowlight". TheUnitedStatesarmyhasnowdeterminedthatglarefromsnowdoesnotcausesnowblindnessintroopsinasnow-coveredcountry.Ratheraman’seyesfrequentlyfindnothingtofocusoninabroadexpanseofbarrensnow-coveredterrain.Sohisgazecontinuallyshiftsandjumpsbackandforthovertheentirelandscapeinsearchofsomethingtolookat.Findingnothinghourafterhourtheeyesneverstopsearchingandtheeyeballsbecomesoreandtheeyemusclesache.Natureoffsetsthisirritationbyproducingmoreandfluidwhichcoverstheeyeball.Thefluidcoverstheeyeballinincreasingquantityuntilvisionblursthenisobservedandtheresultistotaleventhoughtemporarysnowblindness. Experimentsledthearmytoasimplemethodofovercomingthisproblem.Scoutsaheadofamainbodyoftroopsaretrainedtoshakesnowfromevergreenbushescreatingadottedlineastheycrosscompletelysnow-coveredlandscape.Eventhescoutsthemselvesthrowlightweightdarkcoloredobjectsaheadonwhichtheytoocanfocus.Themenfollowingcanthenseesomething.Theirgazeisarrested.Theireyesfocusonabushandhavingfoundsomethingtoseestopscouringthesnow-blanketedlanscape.Byfocusingtheirattentionononeobjectatatimethemencancrossthesnowwithoutbecominghopelesslysnowblindorlost.Inthiswaytheproblemofcrossingasolidwhiteterrainisovercome. Whentheeyesaresoretearsareproducedto
B Treesshouldonlybepruned修剪whenthereisagoodandclearreasonfordoingsoandfortunatelythenumberofsuchreasonsissmall.Pruninginvolvescuttingawayofovergrownandunwantedbranchesandtheinexperiencedgardenercanbeencouragedbythethoughtthatmoredamageresultsfromdoingitunnecessarilythanfromleavingthetreestogrowintheirownways. Firstpruningmaybedonetomakesurethattreeshaveadesiredshapeorsize.Theobjectmaybetogetatreeoftherightheightandatthesametimetohelpthegrowthofsmallsidebrancheswhichwillthickenitsappearanceorgiveitaspecialshape.Secondlypruningmaybedonetomakethetreehealthier.Youmaycutoutdiseasedordeadwoodorbranchesthatarerubbingagainsteachotherandthuscausingwounds.Thehealthofatreemaybeencouragedbyremovingthebranchesthatarelockingupthecentreandsopreventingthefreemovementofair. Oneresultofpruningisthatanopenwouldisleftonthetreeandthisprovidesaneasyentryfordiseasesbutitisawoundthatwillheal愈合.Oftenthereisaracebetweenthehealingandthediseaseastowhetherthetreewillliveordieorthatthereisaperiodwhenthetreeisatrisk.Itshouldbetheaimofeverygardenertoreducetheriskasfaraspossible.Itisessentialtomaketheareawhichhasbeenprunedsmoothandcleanforhealingwillbesloweddownbyroughness.Youshouldallowthecutsurfacetdryforafewhoursandthenpaintitwithoneofthesubstancesavailablefromgardenshopsproducedespeciallyforthispurpose.Pruningisusuallydoneinwinterforthenyoucanseetheshapeofthetreeclearlywithouttheinterference妨碍fromtheleavesanditistooveryunlikelythatthecutsyoumakewillbleed.Ifthisdoeshappenitisofcourseimpossibletopaintthemproperly. Whyisaspecialmaterialpaintedonthetree
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Afooltakesinallthelumberofeverysortthathecomesacrosssothattheknowledgewhichmightbeusefultohimgetscrowdedoutoratbestjumbledupwithalotofotherthingssothathehasdifficultyinlayinghishanduponit.
苏格拉底法又称为
"It’snouseMum"saidJohnny."I’mjustnogoodatdancing." "You’vegottokeeptrying.Tonightwillbe16dear.TryaturnwiththatprettyLisette." Johnny17EverySaturdaynightusedtobethebestoftheweek.Heandhisparentswenttothe18attheClubwherehisheroAlcideplayedtheaccordion手风琴withtheband.Butlatelyeverythinghadchanged.NowthatJohnnywasolderhewas19todancewithagirl! 20JohnnyandhisparentsarrivedattheClubmusichadalreadystarted.Johnnygotuphis21toapproachLisette.“MayIhavethisdance”Johnnyasked.“That’sallright”saidLisette.JohnnystruggledtokeepupwithLisette’s22stepsbuthewasalwaysonebeatbehindher.ThenJohnnyheardhisfriendPierresay"Look!Johnnyhastwoleftfeet!"23burstfromthecrowd.Johnny24andranoutsidedeterminednevertogotoanotherdance. ThenextSaturdayAlcide25toJohnny’shouseforsomepotatoes.HehappenedtohearJohnnyplayingtheaccordion.Alcide’seyes26"Bringthataccordionandplaysomesongsto-night"Alcidesaid.ThenhedroveoffleavingJohnnystaringopen-mouthed27him. AttheClubJohnnyscannedthecrowdforLisetteand28her.ThebandplayedforalongtimebeforeAlcidesaid"DearfriendsIgota29foryoutonight.YoungJohnnyisgoingtojoinus!"30Johnnysteppedupontheplatformhiseyesonthefloor.Hebegantoplayandtheband31behindhim.Whenthesongendedheheardcheers.Johnnykeptplayinguntilthedancewas32"Youdidafinejobtonight.PlaywithusagainnextSaturdaynight"Alcidesaid."Yessir!"saidJohnny.33hewentoutsideJohnnysawLisetteandherfriendsnearthedoor.Lisettestepped34smiling."Youplayedreallygoodtonight!"shesaid. "Thankyou"Johnnyblushed脸红.AshewalkedonPierre35movedoutofthewayforhimtopass. Johnnypattedhisaccordion.CometothinkofitinhiswholelifehehadneveronceseenAlcideoutonthedancefloor. 25
D Howshouldoneinvestasumofmoneyinthesedaysofinflation通货膨胀Leftinabankitwillhardlykeepitsvaluehoweverhightheinterestrateis.OnlyabravemanoraveryrichonedarestobuyandsellontheStockMarket.Todayitseemsthatoneofthebestwaystoprotectyoursavingsandevenincreaseyourwealthistobuybeautifulobjectsfromthepast.HereIamgoingtooffersomeadviceoncollectingantiqueclockswhichIpersonallyconsiderareamongthemostinterestingofantiques. Isometimeswonderwhatabeingfromanotherplanetmightreportbackaboutourwayoflife."TheplanetEarthisruledbyamysteriouscreaturethatsitsorstandsinaroomandmakesastrangetickingsound.Ithasafacewithtwelveblackmarksandtwohands.Mencandonothingwithoutitspermissionanditfastensitsyoungroundpeople’swristssothateverywheremengotheyarestillunderitscontrol.ThiscreatureistherealmasterofEarthandmenareitsslaves." Whetherornotweareslavesoftimetodaydependsonourcultureandpersonalitybutitisbelievedthatmanyyearsagokingskeptspecialslavestotellthetime.Certainmenwereverycleveratmeasuringthetimeofdayaccordingtothebeatingoftheirownhearts.Theyweremadetostandinafixedplaceandeveryhourorsowouldshoutthetime.Soitseemsthatthefirstclockswerehumanbeings. Howevermenquicklyfoundmoreconvenientandreliablewaysoftellingthetime.Theylearnedtousetheshadowscastbythesun.Theymarkedthehoursoncandlesusedsandinhour-glassesandinventedwater-clocks.Indeedanyseriousstudentofantiquesshouldspendasmuchtimeaspossiblevisitingpalacesstatelyhomesandmuseumstoseesomeofthefinestexamplesofclocksfromthepast. Antiqueclockscouldbeveryexpensivebutoneofthejoysofcollectingclocksisthatitisstillpossibletofindquitecheaponesforyourownhome.Afterallifyouaregoingtoberuledbythetimewhynotinvestinairantiqueclockandperhapsmakeafutureprofit Accordingtothepassagecollectingantiqueclocks
"It’snouseMum"saidJohnny."I’mjustnogoodatdancing." "You’vegottokeeptrying.Tonightwillbe16dear.TryaturnwiththatprettyLisette." Johnny17EverySaturdaynightusedtobethebestoftheweek.Heandhisparentswenttothe18attheClubwherehisheroAlcideplayedtheaccordion手风琴withtheband.Butlatelyeverythinghadchanged.NowthatJohnnywasolderhewas19todancewithagirl! 20JohnnyandhisparentsarrivedattheClubmusichadalreadystarted.Johnnygotuphis21toapproachLisette.“MayIhavethisdance”Johnnyasked.“That’sallright”saidLisette.JohnnystruggledtokeepupwithLisette’s22stepsbuthewasalwaysonebeatbehindher.ThenJohnnyheardhisfriendPierresay"Look!Johnnyhastwoleftfeet!"23burstfromthecrowd.Johnny24andranoutsidedeterminednevertogotoanotherdance. ThenextSaturdayAlcide25toJohnny’shouseforsomepotatoes.HehappenedtohearJohnnyplayingtheaccordion.Alcide’seyes26"Bringthataccordionandplaysomesongsto-night"Alcidesaid.ThenhedroveoffleavingJohnnystaringopen-mouthed27him. AttheClubJohnnyscannedthecrowdforLisetteand28her.ThebandplayedforalongtimebeforeAlcidesaid"DearfriendsIgota29foryoutonight.YoungJohnnyisgoingtojoinus!"30Johnnysteppedupontheplatformhiseyesonthefloor.Hebegantoplayandtheband31behindhim.Whenthesongendedheheardcheers.Johnnykeptplayinguntilthedancewas32"Youdidafinejobtonight.PlaywithusagainnextSaturdaynight"Alcidesaid."Yessir!"saidJohnny.33hewentoutsideJohnnysawLisetteandherfriendsnearthedoor.Lisettestepped34smiling."Youplayedreallygoodtonight!"shesaid. "Thankyou"Johnnyblushed脸红.AshewalkedonPierre35movedoutofthewayforhimtopass. Johnnypattedhisaccordion.CometothinkofitinhiswholelifehehadneveronceseenAlcideoutonthedancefloor. 17
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Hedidnotregretsayingwhathedidbutfeltthathe______itdifferently.
Ifyouleavetheclubyouwillnotbe______backin.
"It’snouseMum"saidJohnny."I’mjustnogoodatdancing." "You’vegottokeeptrying.Tonightwillbe16dear.TryaturnwiththatprettyLisette." Johnny17EverySaturdaynightusedtobethebestoftheweek.Heandhisparentswenttothe18attheClubwherehisheroAlcideplayedtheaccordion手风琴withtheband.Butlatelyeverythinghadchanged.NowthatJohnnywasolderhewas19todancewithagirl! 20JohnnyandhisparentsarrivedattheClubmusichadalreadystarted.Johnnygotuphis21toapproachLisette.“MayIhavethisdance”Johnnyasked.“That’sallright”saidLisette.JohnnystruggledtokeepupwithLisette’s22stepsbuthewasalwaysonebeatbehindher.ThenJohnnyheardhisfriendPierresay"Look!Johnnyhastwoleftfeet!"23burstfromthecrowd.Johnny24andranoutsidedeterminednevertogotoanotherdance. ThenextSaturdayAlcide25toJohnny’shouseforsomepotatoes.HehappenedtohearJohnnyplayingtheaccordion.Alcide’seyes26"Bringthataccordionandplaysomesongsto-night"Alcidesaid.ThenhedroveoffleavingJohnnystaringopen-mouthed27him. AttheClubJohnnyscannedthecrowdforLisetteand28her.ThebandplayedforalongtimebeforeAlcidesaid"DearfriendsIgota29foryoutonight.YoungJohnnyisgoingtojoinus!"30Johnnysteppedupontheplatformhiseyesonthefloor.Hebegantoplayandtheband31behindhim.Whenthesongendedheheardcheers.Johnnykeptplayinguntilthedancewas32"Youdidafinejobtonight.PlaywithusagainnextSaturdaynight"Alcidesaid."Yessir!"saidJohnny.33hewentoutsideJohnnysawLisetteandherfriendsnearthedoor.Lisettestepped34smiling."Youplayedreallygoodtonight!"shesaid. "Thankyou"Johnnyblushed脸红.AshewalkedonPierre35movedoutofthewayforhimtopass. Johnnypattedhisaccordion.CometothinkofitinhiswholelifehehadneveronceseenAlcideoutonthedancefloor. 23
Sostartlingwouldhisresultsappeartotheuninitiatethatuntiltheylearnedtheprocessesbywhichhehadarrivedatthemtheymightwellconsiderhimasanecromancer.
B Treesshouldonlybepruned修剪whenthereisagoodandclearreasonfordoingsoandfortunatelythenumberofsuchreasonsissmall.Pruninginvolvescuttingawayofovergrownandunwantedbranchesandtheinexperiencedgardenercanbeencouragedbythethoughtthatmoredamageresultsfromdoingitunnecessarilythanfromleavingthetreestogrowintheirownways. Firstpruningmaybedonetomakesurethattreeshaveadesiredshapeorsize.Theobjectmaybetogetatreeoftherightheightandatthesametimetohelpthegrowthofsmallsidebrancheswhichwillthickenitsappearanceorgiveitaspecialshape.Secondlypruningmaybedonetomakethetreehealthier.Youmaycutoutdiseasedordeadwoodorbranchesthatarerubbingagainsteachotherandthuscausingwounds.Thehealthofatreemaybeencouragedbyremovingthebranchesthatarelockingupthecentreandsopreventingthefreemovementofair. Oneresultofpruningisthatanopenwouldisleftonthetreeandthisprovidesaneasyentryfordiseasesbutitisawoundthatwillheal愈合.Oftenthereisaracebetweenthehealingandthediseaseastowhetherthetreewillliveordieorthatthereisaperiodwhenthetreeisatrisk.Itshouldbetheaimofeverygardenertoreducetheriskasfaraspossible.Itisessentialtomaketheareawhichhasbeenprunedsmoothandcleanforhealingwillbesloweddownbyroughness.Youshouldallowthecutsurfacetdryforafewhoursandthenpaintitwithoneofthesubstancesavailablefromgardenshopsproducedespeciallyforthispurpose.Pruningisusuallydoneinwinterforthenyoucanseetheshapeofthetreeclearlywithouttheinterference妨碍fromtheleavesanditistooveryunlikelythatthecutsyoumakewillbleed.Ifthisdoeshappenitisofcourseimpossibletopaintthemproperly. Whatwastheauthor’spurposewhenwritingthispassage
Becauseofthefinancialcrisisdaysaregone______local5-starhotelscharged6000yuanforonenight.
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