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圆的半径是2cm，假设半径增加x cm时，圆的面积增加y cm2，那么y与x之间的关系表达式为 ．
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若两圆的半径分别为２cm和７cm圆心距为５cm则这两圆的位置关系是_____.
一个圆的半径增加2cm则这个圆
周长增加4cm
周长增加4πcm
面积增加4cm
2
面积增加4πcm
2
在半径为4cm的圆中挖出一个半径为xcm0
y＝πx
2
－4
y＝π(2－x)
2
y＝π(x
2
＋4)
y＝－πx
2
＋16π
当圆的半径等于2cm时圆的周长与面积的数值相等．．判断对错
圆锥的侧面积为6πcm2底面圆的半径为2cm则这个圆锥的母线长为3cm.
如果一个圆的半径由2cm增加到4cm圆的面积就增加
12.56cm
2
50.24 cm
2
37.68 cm
2
甲圆的半径是2cm乙圆的半径是4cm甲圆的周长比乙圆周长
小2cm
小6.18cm
小12.56cm
小37.68cm
圆的半径是2cm假设半径增加xcm时圆的面积增加ycm2那么y与x之间的关系表达式为．
圆的半径是1cm当半径增加xcm时圆的面积将增加ycm2则y与x之间的函数关系为．
一圆锥的底面半径为1cm母线长2cm则该圆锥的侧面积为cm2.
已知两圆外切圆心距为6cm其中一圆的半径为2cm则另一圆的半径为cm.
已知圆柱的侧面积是6πcm2若圆柱的底面圆的半径为xcm高为ycm则y与x的函数关系式是
一圆锥的底面半径为1cm母线长2cm则该圆锥的侧面积为2πcm2.
下列选项中面积最小的是
直径3cm的圆
半径2cm的圆
周长3.14cm的圆
圆的半径增加1cm它的直径就增加2cm． 判断对错
圆的半径由2cm增加到3cm这个圆的面积增加了cm2．
1
5
5π
π
圆的半径增加2cm它的直径也增加2cm．．判断对错
一个半径为2cm的圆内接正六边形的面积等于.
两圆相切圆心距为2cm一圆半径为6cm则另一圆的半径为cm．
光盘的银色部分是一个圆环内圆半径是2cm外圆半径是6cm．它的面积是多少
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TheQingmingFestivaliscelebratedwithathree﹣daynationalholidaywhosenameoriginatesfromthesayingPlantsstarttoreviveandprosperatQingminginacleanandbrightway.ThusthefestivaliscalledQingmingwhichmeanscleanandbright.1Tombsweepingaimstocommemoratefamilyancestorswhilegoingonaspringoutingallowseveryonethechancetoenjoythebeautifulsceneryandenjoytheseason. Traditionalcustoms Tombsweeping.2Onthisdaythewholefamilygathersinfrontoftheirancestraltombs.Theyofferfruitandwinetotheirancestorsandcleantheweedsfromaroundthetomb.Finallytheykowtowandprayhopingfortheirancestors'blessingfortherestoftheyear. Springouting.ThetimearoundtheQingmingFestivalisoneofthemostsuitableseasonsforaspringoutingasplantsarethrivingandflowersareblooming.Peoplecanhaveagreattimeoutdoorswiththeirfriendsandfamily.3 Traditionalfood QingtuanagreenriceballtinyenoughtofitintoyourhandisalsocalledQingmingguoorAiguo.4ItisamixtureofstickyricepowderandgreenvegetablejuicestuffedwithsweetenedbeanpasteQingtuantastessweetwiththefreshfragranceofAicaoagreenspringvegetable. IncelebrationofQingmingpeoplefromShaanximakesteamedbunsknownasHuamomadeintodifferentshapes.5Someareforpeacefulfamilylifewhileothersrepresentthewishforhealth. A.Witheachdistinctlookcomesagoodblessing B.Playingfootballandflyingkitesarepopularactivities. C.ItispopularinthesouthernregionsoftheYangtzeRiver. D.Familymembersgathertogethertocelebrateandtastethefood. E.ThetraditionoftombsweepingoriginatesfromtheQinDynasty F.Manytraditionalcustomsarepracticedtoshowrespectforourancestors. G.Thetwomainactivitiesoverthefestivalincludetombsweepingandgoingonaspringouting.
Societytellsusthatyoucan'tteachanolddognewtricks.Butitdoesn'thavetobethatway.AnewstudypublishedinHumanDevelopmentpointsoutthatusingachildlikeapproachtolearningcanhelppeopleofanyagetakeonandrisetonewchallenges.1 Venture冒险outsideyourcomfortzone.Asadultswetendtousesimilarskillsdayinanddayout:Wetakejobsinfieldswerealreadygoodatdrivethesameroutestothesameplacesandfallintoroutineswe'recomfortablewith.2.Switchingtosomethingmorechallengingmayhavemorecognitivebenefits. 3.Afearofmakingmistakesisanotherreasonadultsaresoslowtolearnnewthings;ifwetryandfailwecanfacecriticismlosemoneyorgetfired.That'swhyit'simportanttobuildupasupportnetworkofpeople﹣atworkandathome﹣whoallowyoutomakemistakesandlearnfromthem. Makeaseriouscommitmentanddon'tgiveup.4.Ifyoucanafforditspendingmoneyonanewpursuit﹣forexamplebookingatriptoRometopracticeyourItalian﹣mightalsomakeithardertothrowinthetowel. Learnmorethanonethingatonce.Wetendtozeroinononehobbyoroneskill.Butdividingthattimeandenergyintothreeorfourareaswillstretchyourbraininalldifferentdirections.5Forexamplemaybeyoustartedlearninganewlanguagein2018andthisyearyouaddsinginglessonsandnextyearyoutrysomethingelse.Youcanaddthingsgraduallybasedonwhatyoucanhandle. A.Turntoyourfriendsandfamily. B.Thefollowingstrategieswilldothetrick. C.Surroundyourselfwithencouragingpeople. D.Tellingfriendsaboutyournewgoalcanhelpkeepyoumotivated. E.Butallthisfamiliaritylimitsthepartsofthebrainwe'reusingregularly. F.Thatdoesn'tmeanyoushouldstartallthenewchallengesallatoncethough. G.Sofeelingcomfortablecanreducestressandmakeyouhappierandmoreproductive.
TOKYOJune8Xinhua﹣﹣TheBeijingOrganizingCommitteeofthe2022OlympicandParalympicsWinterGamesheldapromotioneventintheJapanesecapitalTokyoonSaturdaytointroducethelatestdevelopmentsinpreparationfortheBeijingWinterOlympics. ThepromotioneventwhichusedanexhibitionwallandtheCharmingBeijingphotoexhibitiontoshowcasethepreparationsofBeijing2022waspartofBeijingWeekaseriesofactivitiestocommemoratethe40thanniversaryoftheestablishmentofsister﹣cityrelationsbetweenBeijingandTokyo. Ontheexhibitionwallwithanareaof33squaremetersBeijing2022organizersshowcasedfiveaspectsincludingtheBeijingWinterOlympicsvisionBeijing'swintersportstraditionemblem2íofBeijing2022competitionplanningandtheNationalSpeedSkatingOval. AtthesametimeoldphotosoftheChineseandJapaneseicehockeyteamsechoedthe40thanniversaryoftheestablishmentofsister﹣cityrelationsbetweenthetwocitiesandthethemeoftheBeijingWinterOlympics. ThepromotionvideosoftheBeijing2022emblemsaswellasotherrelatedvideoclipsdrewgreatinterestoftheaudience. TheCharmingBeijingphotoexhibitiondisplayedsomeoftheWinterOlympicvenuesshowingtheprogressofthepreparationsfortheBeijingWinterOlympics. MeanwhilesandtableVRglassesandtheBeijingWinterOlympicsBrochurearealsoprovidedtolettheaudiencevisuallyexperiencetheuniquecharmoftheNationalSpeedSkatingOvalandthefeaturesofothercompetitionvenues. ChangYuDirectorGeneraloftheMediaandCommunicationsDepartmentoftheBeijingWinterOlympicOrganizingCommitteeintroducedtheprogressofthepreparations2022andthevisionofcooperationbetweenBeijing2022andTokyo2020. ChangYusaidthattheBeijingWinterOlympicsOrganizingCommitteestayscommittedtowiththeaimofdeliveringahostingtheGamesinagreeninclusiveopenandcleanmannerwithanaimofdeliveringafantasticextraordinaryandexcellentOlympiceventtotheworld. TheBeijingWinterOlympicswillopenonFebruary42022.whichwillfeaturesports15disciplinesand109events. 1Howwasthepromotioneventcarriedout AByadvertisingonTVinBeijingandTokyo. B.BysendingoffbrochurestocitizensinTokyo. C.Byprovidingvariousvisualexperiences D.ThroughtoursallaroundTokyo. 2Theunderlinedwordcommemorateinparagraph2isclosestinmeaningto A.celebrate B.appreciate C.compare D.combine 3WhatcanbeinferredfromChangYu'sintroduction A.BeijingwillhosttheOlympicsearlierthanTokyo. B.Beijingiswellpreparedforthe2022event C.Beijing2022provesagreatsuccess. D.Beijing2022willbeenvironmental﹣friendly. 4Whichofthefollowingcanbethetitleofthispassage A.TheSister﹣CityAnniversarybetweenBeijingandTokyo B.Beijing2022PromotionEventinTokyo C.BeijingandTokyoFriendshipForever D.PreparationsforBeijing2022Olympic
假定英语课上老师要求同桌之间交换修改作文请你修改你同桌写的以下作文.文中共有10处语言错误每句中最多有两处.每处错误仅涉及一个单词的增加删除或修改. 增加:在缺词处加一个漏字符号∧并在其下面写出该加的词. 删除:把多余的词用斜线\划掉. 修改:在错的词下画一横线并在该词下面写出修改后的词. 注意: 1.每处错误及其修改均仅限一词 2.只允许修改10处多者从第1处起不计分. ItwasasunnydaybutIwenttoXishanParkforaspringouting.ThemomentwhenIenteredtheparkavarietyofbeautifulflowersandgreentreescameintosight.AttractingbythebeautyIcouldn'thelptakingphotosAsIwanderedalongthepathenjoyingthebeautifulviewInoticedanythingunpleasant.Twoschoolgirlsjumpedoverthefencetopickflowers.Obviouslytheydidn'trealizethattheirbehaviorhasdonegreatdamagetobeautyofthepark.WithouthesitationIwentupandstoppedherpolitely.Feelingquiteembarrassedthetwogirlscameoutimmediate.Thentheytookpicturesinsidethefence.SeeingthatIsmiledandeverythinglookednicerinmyeye
Beijingroastduckwhichishonoredasbyfar1deliciousdishintheworldhaswonfamebothathomeandabroad.Nowadaysanincreasingnumberof2foreignertravelingtoBeijingfallinlovewith3. Preparingqualityroastduck4bealongcomplicatedprocessofmanystepsfromselectingtheduckatthebeginningto5serveittothedinersattheend.Eachstepiscarefullytakentoguaranteetheroastduckisattractivein6appearredincolorfragrantandhotwiththinsteamwhenserved.Intherestaurantducksareroastedupontheorderofthediners.Afteraroastduckisreadyitisbroughttothedinersinfrontof7achefwillskillfullyslicethejuicymeateachpiecewithwell﹣cookedskin8attach.Youcandiptheslicesofduckintosweetsauce酱andwrapthemeatwithsomespringonionsinsideathinpancakeandonlythendoesonefinallytakeabite!Normallytheremainingbonesoftheduck9cookslowlyinacloseddishformakingdeliciouscream﹣whitesoup.Allgoeswellwithwinethusmakingthedinner10unforgettablefull﹣duckbanquet宴会.
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DerekRabeloisnottheonlysurfertoconquerHawaii'sfamousPipelinebigwavebreakbutwhileallothersusetheirsighttodoitthisyoungprofessionalsurfermustrelyonlyonhisothersenses.That'sbecauseheiscompletelyblind. WhenDerekwasbornover24yearsagohegothisnamefromDerekHothefirstHawaiiansurfingworldchampion.AsurfingenthusiasthimselfErnestodreamedthathissonwouldsharethetalentofhisuncle.aprofessionalsurfer.UnfortunatelyDerekwasborncompletelyblindbutthisdidn'tstophisfamilyfrombelievingthathecoulddoanythinghewantedevenifthatmeantbecomingasurfer. Atage2DerekreceivedabodyboardandthebeachesofGuarapariBrazilbecamehisbackyard.Hewasalwayscomfortableinthewaterandsurfingwasinhisbloodbuthedidn'tactuallytryridingawaveuntilheturned17whenhisfatherboughthimasurfboard.HisfathertaughthimthebasicsandencouragehimtokeeppracticingbutaftersuccessfullystandinguponthesurfboardDerekknewheneededtobecomemuchbetterifhewasgoingtoachieveErnesto'sdreamandbecomeaprofessionalsurfer.SohejoinedthePraisdoMorrosurfschoolwherehestudiedundercoachFabioMaru. StandinguponasurfboardandconqueringsmallwavesisonethingwhilegatheringthecouragetotakeonHawaii'sboard﹣breakingPipelineisanother.Butthat'sexactlywhatDerekRabelosetouttodojustmonthsafterlearninghowtosurf.Everyonetoldhimitwastoodangerousbuthefelthecoulddoit.AndhedidearningthepraiseoffamousprofessionalsurferslikeKellySlaterandMickfanning.Now24RabelohasbeensurfingthePipelineeverywintersince. 1Whatdoesthefirstparagraphtellus A.Goodeyesightisnecessaryforbecominggoodsurfer. B.NobodyhaseverconqueredHawaii'sbigwavebreak. C.DerekRabelodreamstoconquerHawaii'sbigwavebreak. D.DerekRabeloistheonlyblindprofessionalsurfertoconquerHawaii'sbigwavebreak. 2HowdidErnestobehaveafterDerekwasborn A.Heneverlostconfidenceinhim. B.Henamedhimafterhisuncle. C.Hesenthimtosurfingchampion. D.Hestartedhisowninterestinsurfing. 3AfterDerekwasabletostanduponthesurfboardhe. A.begantotryridingawave B.wasnolongerafraidofwater C.realizedhestillhadalongwaytogo D.knewhisfathersdreamhadcometrue 4WhichofthefollowingwordscanbestdescribeDerekaccordingtothelastparagraph A.Skillfulbutproud. B.Braveandconfident. C.Courageousbutstubborn D.Thoughtfulandmodest.
XuLizhena74﹣year﹣oldladyhasbeenactingasatourguidefornearly20yearsinYangShuoGuiLin1isacityknownbothinChinaandabroadforitsbeautifullandscape2sheattendedonlyprimaryschoolwhenshewasyoungShecannowspeakapproximately11foreignlanguages3fluent. Since20yearsagotourists4showaffectionforYangShuoincludingagreatmanyforeignersInordertomakea5liveXuLizhenbegantosellwater.Howevershecouldhardlymakeanymoneyatfirstbecauseforeignersdidn'tunderstandheraccent.Shetriedtoimitatethe6pronounceoftheforeignerstakenotesandlearnthem7heart.IfshecameacrosstouristswhocanspeakbothChineseandaforeignlanguageshewouldaskthemtotranslatetheirwordsmanytimessothatshecouldrememberthem8well.Itisinthiswaythattheoldgrannymasters11languagessuchasEnglishFrenchRussianKorean.Nowshehasnodifficultyatall9communicatewithforeignfriendsinsimpleoralEnglish.Sheisalso10refertoasMotherMoonforherkindnessamongtourists.
Withoutreducingfunanyonecanhostabirthdaypartyonatightbudget.SanFranciscotheEastBayandSouthBayinparticulararefullofonlyfound﹣herelocationsthatcanmakethedayspecial.AdayatGreatAmericatourofSBCParkandabaseballgameoraprivatepartyattheOaklandChabotSpaceandScienceCenterareexperiencesuniquetoBayAreafamilies. Thesepartiesarethemostfunbecauseabudgetforcesyoutobecreativewithwhatyou'vegot.Thekeyhereistofindaspotthatisfreeorcheap. Afewplacestoconsiderarepublicparks﹣findoneswithage﹣appropriateplaystructuresthatarerelativelysafe.Inthesummerlocatealocalpoolwithplentyoflifeguardsandhavethosehandyparentscomealongasguests.Andasyouplanconsideryourguests'abilitiesandcomfortlevels.Ifyourchildlovestoice﹣skatebutherfriendshateitmaybeshecanchooseadifferentactivityormainlychoosetodothisasafamilybirthdayouting. Zoosarerelativelyinexpensiveaswell.TheSanFranciscoZoocharges﹩11peradultand﹩5foreachchildages3﹣11and﹩8for12﹣17.TheOaklandZooadmitsadultsfor﹩9andkids﹩5.50forages2﹣14. Museumsandaquariums水族馆oftenhaveafreeadmissionday.YoucantakekidstotheSteinhartAquariumforfreethefirstWednesdayofeachmonth.ThesamegoesfortheExploratoriumalsoinSanFrancisco.ThedeYoungMuseumisalsofreeforallvisitorsthefirstTuesdayofeverymonth.Italsochargesallkidsnothingwhoare12andunderdaily.Organizeyourfreemuseumdaysduringschoolbreaksorholidaysandyou'llsavealot. 1WhatcanyoudoattheOklandChabotSpaceandScienceCenter A.Holdaparty B.AdmireGreatAmerica C.Watchanationalbaseballgame D.LearnaboutthehistoryofSanFrancisco 1Whichofthefollowingisalwaysfreeforakidunder12 A.TheOaklandZoo B.TheExploratorium C.TheSanFranciscoZoo. D.ThedeYoungMuseum 3Whattypeofwritingisthistext A.Abudgetreport B.Atravelguide. C.Abookreview D.Amuseumbrochure
不等式﹣x+1＞0的正整数解是．
AtthefarendofIslingtonRoadinNewtonMassachusettslivesalittlegirlnearanddeartotheneighborhood.Two﹣year﹣oldSamanthaSavitzis1butshelovestotalktoanyonewhoknowssignlanguage.Andherwholepersonalitychangeswhenit'ssomeonewhocan2withher. Herdesireforcommunicationhasbeen3obvioustoeveryoneintheneighborhood.WheneverSamtriestobeneighborlythey4themselveslostforwords.Sotheyneedto5morethanabasicconversationwiththechildinthecommunity. Unfortunatelythisisn'tsomethingyoucan6withease.You'dneedthewholecommunitytolearnsignlanguage7foralittle2﹣year﹣oldgirl.Youcan't8neighborstodothat.Youcanonlyappreciatethemwhentheydo. OntheirownSam'sneighborsgottogether9aninstructorandarenowfully10anAmericanSignLanguageclass.Eventheparentsofdeafchildrendon't11tolearnsignlanguage.NowSamhasawhole12tocommunicatewithher. Andthislevelofinclusionwillalmostcertainlyguaranteeahappiermore13Sam.Herparentssaystherearen'twordsinanylanguagetoexpresstheir14.Infactthey'realreadyseeinga15intheirdaughter.Thefirstthingshesaystousis‘friend'saidhermotherIthinkyourheartwould16justasminedid. SometimesitfeelslikeAmericaislosingits17ofcommunity﹣butthenyouhearaboutaplacelikethiswhereittakesawholevillageto18achild.Nowthevillageisaliveandishereto19usthatwhatmakesagoodneighborhoodisnothingmorethangood20. 1A.blind B.deaf C.lame D.dull 2A.communicate B.sing C.play D.quarrel 3A.cheerfully B.peacefully C.painfully D.doubtfully 4A.make B.find C.let D.have 5A.strikeup B.putoff C.gothrough D.takein 6A.confirm B.trust C.discover D.solve 7A.still B.even C.just D.also 8A.educate B.expect C.wish D.help 9A.trained B.taught C.hired D.dismissed 10A.trappedin B.involvedin C.awareof D.equippedwith 11A.agree B.plan C.promise D.bother 12A.school B.community C.family D.club 13A.well﹣fed B.well﹣known C.well﹣behaved D.well﹣adjusted 14A.sympathy B.dilemma C.gratitude D.love 15A.complaint B.fault C.difference D.commitment 16A.melt B.race C.break D.burst 17A.control B.credit C.sign D.sense 18A.raise B.feed C.tell D.request 19A.urge B.warn C.guide D.remind 20A.neighbors B.friends C.partners D.colleagues
72hoursinBeijing TravelingtoChinaisnolongeraluxuryformanyforeignpassportholders.TheChinesegovernmenthaspermitteda72﹣hourvisa﹣freepolicythatoffersaccesstovisitorsfrom53countriesincludingtheUSFranceandAustria.LetsstartwiththecapitalofChinaBeijingHere'sapickofthebestinBeijing! MutianyuGreatWall YourtriptoBeijingisn'treallycompletewithoutseeingoneoftheNewSevenWondersoftheWorldtheGreatWallofChinaTheMutianyusectionoftheGreatWallisbyfarthemostwell﹣preservedofall.TakingaonehourbusrideMutianyuwouldbeyourideallocationforahalf﹣dayofhikingawayfromthelargecrowdsinthecity.AlsotheauthoritieshaveallowedtouriststopaintgraffitionaspecificsectionoftheGreatWallsince2014.TheGreatWallwasdesignatedaUNESCOWorldHeritagesitein1987. 798ArtZone Thiswouldbeonthetopofmylist!Namedafterthe798factorythatwasbuiltinthe1950stheartzoneishometovariousgalleriesdesignstudiosartexhibitionspacesfashionableshopsandbars.Youcouldeasilyspendhalfyourdaywanderingaroundthecomplexfeelingthecontrastofthepresentandthepast. SummerPalace LocatedinnorthwesternBeijingtheSummerPalaceisbyfarthecity'smostwell﹣preservedroyalpark.WithitshugelakeandhilltopviewsthepalaceoffersyouapastoralescapeintothelandscapeoftraditionalChinesepaintings.TheSummerPalacewasaddedtotheUNESCOWorldHeritageListin1998. SichuanProvincialRestaurant WhileinBeijingapartfromtryingthecity'sbest﹣knownPekingducktheSichuanprovincialrestaurantisoneofplaceswhereyoucanenjoyregionaldeliciousfood.ItoffersoneofChina'seightgreatcuisinesSichuanwhichrangesfromMapotofutospicychicken. 1WhichofthefollowingistrueabouttheMutianyuGreatWall A.Itisthemostwell﹣preservedpartoftheGreatWall. B.Youcanpaintgraffitianywhere. C.Youneedahalf﹣daytogetthere. D.ItwasdesignatedaUNESCOWorldHeritagesitein2014. 2WhenwastheSummerPalaceaddedtotheUNESCOWorldHeritageList A.In1950. B.In1987. C.In1998. D.In2014. 3WhichplaceistheauthorsfirstchoicewhenvisitingBeijing A.MutianyuGreatWall. B.SummerPalace. C.798ArtZone. D.SichuanProvincialRestaurant.
1解方程+＝2 2如图在菱形ABCD中AE⊥BC于EAF⊥CD于F．求证△ABE≌△ACF．
It'sonceagainbeendeclaredtheworld'smostpopularmuseum.1.itmaynotbea2 thingfortheLouvre卢浮宫inParis. Themuseumbrokeitsown3in2018welcoming10.2million4andclaimingthetopspotinanindexoftheworld'smost﹣visitedmuseums. ButtheLouvre'suptick小幅上升invisitorsis5toomuchformanyofitsworkers 6byreceptionandsecuritystaffoverthenumberoftourists7throughitsdoorshavehitopeninghoursthroughouttheweek. TheLouvreissuffocating令人窒的theworkersunionsaidinastatement.Thepublichasincreasedbymorethan20%since2009butthepalacehasnotgrownit8. Themuseumwas9onMondayandopenedlaterthanadvertisedonWednesdayduetoa10withthedissatisfiedworkers.visitorshave11outsidethebuildingthroughouttheweekandthosewithoutbookingshavebeen12. Althoughtensionswithitsworkers13themuseum'sbottomlineislooking14.TheLouvrebrokeits201215recordlastyearmarkingadramatic16fromasharpdownturninvisitsin2017thatwasduetoasuddendecreasein17inParis. Thesocialmediathatare18aboutBeyoncéandJayZ'smusic19filmedatthemuseummayhaveplayedintothatincrease. ButwhilevisitornumbersroseattheLouvreoverallattendancewasrelatively20amongthetop20museumsintheworldlastyear.Attendancegrewamongthetop20byjust0.1%from2017to2018. 1A.Moreover B.However C.Finally D.Eventually 2A.splendid B.skeptical C.tough D.sad 3A.promise B.rule C.record D.law 4A.musicians B.artists C.visitors D.volunteers 5A.acquiring B.suffering C.blaming D.proving 6A.strikes B.quarrels C.fights D.contests 7A.flooding B.jumping C.crawling D.slipping 8A.stopped B.added C.started D.paused 9A.decorated B.repaired C.visited D.closed 10A.lecture B.meeting C.speech D.lesson 11A.queued Bdined C.helped D.served 12A.turnedup B.turnedover C.turnedaway D.turnedon 13A.dieout B.payoff C.fadeaway D.goon 14A.healthy B.funny C.tiny D.cozy 15A.quality B.attendance C.photo D.worker 16A.alarm B.attack C.recovery D.prediction 17A.paintings B.products C.population D.tourism 18A.innocent B.selfish C.crazy D.generous 19A.concert B.video C.festival D.industry 20A.high B.huge C.round D.flat
黑白两种颜色的正六边形地砖按如图所示的规律拼成若干个图案则第n个图案中有白色地砖块．用含n的代数式表示
假定英语课上老师要求同桌之间交换修改作文请你修改你同桌写的以下作文.文中共有10处语言错误每句中最多有两处.每处错误仅涉及一个单词的增加删除或修改. 增加:在缺词处加一个漏字符号并在其下面写出该加的词. 删除:把多余的词用斜线\划掉. 修改:在错的词下划一横线并在该词下面写出修改后的词. 注意:1.每处错误及其修改均仅限一词; 只允许修改10处多者从第11处起不计分. TosupporttheactivitynameGreenTravelStartwithMeItalktomyparentsaboutmyideas.Theywereverysupportivesaytheywouldnotdriveworkfromthenon.InthefollowingweeksastheypromisedIwenttoschoolbybikeeverydaywhilemyparentswenttoworkbybus.Thoughweweretiredbutweallfelthappily.LastFridaytheclassmeetingwasheld.Someparentswereinvitedincludingmyfatherandmother.Wesharedourthoughtduringthemeeting.Allofusheldthesameviewwhichenvironmentalprotectionissoimportantforourlife.
Outof89sitesgivenspecialprotectionduetothequalityoftheirlandscapeplanningpermissionforturbines轮机hasbeenapprovedat14. AffectedareasrangefromCornwalltotheLakeDistricttheOuterHebridesandtheShetlandIslands.Peopleclaimthattheprojectswouldspoilmuch﹣lovedviewsandhavecalledforclearerrulesonwherewindfarmscanandcannotbebuilt. Environmentalistshavecalledforachangeintheplanningsystemandsaythecurrentarrangementhasledtoafree﹣to﹣allamongwindfarmdevelopersInCornwallplanstobuild20turbineseach415ftinheight﹣tallerthanBigBenorStPaul'sCathedral﹣onlandnexttoBodminMoorhavebeenapprovedbythelocalcouncildespiteoppositionfromFriendsoftheEarththeRSPBandNaturalEngland.ExpertshavesaidtheturbineswillbevisiblefrommuchofBodminMoorandwillhaveahugeimpactonadistinctiveareaoflandseape. Theareaisalsohometomorethanonemillionstarlings八哥鸟andtothousandsofgoldenplover千鸟aprotectedspecies.Conservationistsestimatethat16000starlingsanddozensofgoldenploverwouldbekilledeveryyearbytheturbines ArthurBoytthechairmanoftheStopTurbinesinNorthCorwallcampaigngroupsaidThisareaofCornwallisfamousforthesceneryandtheviews.Itisawildandbeautifulareaofcountryside.Thewindfarmwouldviolatewhatisaverypeacefuldistinctandbeautifullandscapeandreduceittoinsignificancebehindthoseturbines. ButCharlesAnglinoftheBritishWindEnergyAssociationwhichrepresentstheindustrysaiddecisionsshouldbemadeonacase﹣by﹣casebasis. HesaidhebiggestthreattotheUk'sandtheworldshabitatsandwildlifeisdisastrousclimatechange.Todoanythingaboutthatwehavetochangethewayweuseandproduceenergyandthatdoesmeanexpandingtheamountofrenewableenergyweuse. Thelocalimpactisveryimportantbutit'spartofthewiderimpact.Wewouldbeshootingourselvesinthefootifwerejectedwindoutofhandbecauseofpurelylocalconsiderations. 1Accordingtothepassagewhatwillbeinfluencedbythebuildingofturbines A.Thelivingplacesoflocalanimals. B.Quietandnaturalscenery. C.Beautifullandscape. D.Alloftheabove. 2ThepurposeofmentioningtwofamouslandmarksBigBenandStPaul'sCathedralisto. A.makeadvertisementsforBritishtourism. B.showhowhighthesetwobuildingsare. C.comparetheheightofturbinestothem. D.expresstheauthorssurpriseattheheight. 3WhatcanweInferfromCharlesAnglinswords A.Anaturaldisasteriscoming. B.Theimpactshouldbeconsideredfirst. C.Weshouldmakedecisionsbasedontheconditions. D.Expansionofrenewableenergyisthesolutiontoclimatechange. 4What'sthemainideaofthepassage A.ClimatechangeonEarthistooserious. B.Peoplecallforrulesonthebuildingofturbines. C.BuildingturbineshasarousedargumentsinBritain. D.Alotoforganizationsaretakingactionstoprotectourenvironment.
小明和小刚用如图所示的两个转盘做游戏游戏规则如下分别旋转两个转盘当两个转盘所转到的数字之积为奇数时小明得2分当所转到的数字之积为偶数时小刚得1分．这个游戏对双方公平吗若公平说明理由．若不公平如何修改规则才能使游戏对双方公平
画一个正方体的三种平面展开图要求展开图是中心对称图形． 画出的图是正方体的展开图但不是中心对称图形每种可得2分．
DaveMerryandhistoolshavebeenthroughalottogether.ThetoolshelpedDavenow80repairhishomeinSt.PaulMinnesotawhereheandhiswifeAnnetteMerrylivedfor46yearsandraisedthreechildren.Thetablesawthejointerplanethedrillpressandthedozensofotherpowerandhandtoolshadprideofplaceinhiscarefullyorganizedworkshop.'Ihadawholesetupanditwasbeautiful'saysDavearetiredengineer.ButthenAnnetteexperiencedastroke中风thatleftherrelyingonawalkertogetaroundandtheMerrysdecidedtomoveintoassistedliving.Dave'sworkshopwasobviouslyaminorconsiderationgivenAnnette'sconditionbutthefamilyknewthatgivingitupontopofeverythingelsewouldhurt.ItwastheMerrys'daughterwhocameupwithapossiblesolution.She'dheardaboutsomepeoplewhoweresettingupatoollibrary﹣anonprofitfacilitythatwouldlendouttoolsjustasaregularlibrarylendsbooks.MightDadbeinterestedindonatinghis'Isaidyes'Davesays.ThepeoplecreatingtheSt.PaulToolLibrarywerethrilled.Theyhadexpecteditwouldtakeayeartocollectenoughtoolstomaketheirfacilityfullyfunctional.Insteadittookoneday:thedayDavedonatedhis.Thelibrary'sfoundersdroveovertotheMerrys'houseandpickedeverythingupthemselves.ThelibraryishousedinthebasementoftheAmericanCanFactory.Memberspayanannualfeefrom﹩20to﹩120forunlimitedtooluseandavaryingnumberofvisitstotheworkshop.Andtheygetanextrabenefit:DaveMerry.'Almosteverytimewe'reopenDave'shere'saysoneofthefoundersPeterHoh.'Itmeansalottometobeabletogoandusemytools'Davesays.'ButitmeansjustasmuchtohelpDIYersusethetoolsproperly.'AsHohputsit'Thisishisworkshopnow.'1WhatdoweknowaboutDaveMerryA.HehadfewDIYtools.B.Hekepthistoolswell.C.Heownedatoollibrary.D.Heusedawalkingstickafterstroke.2HowdidthedaughterhelpherparentsA.ShetookoverDad'sworkshop.B.SheofferedDadusefulinformation.C.Shemovedthemintoassistedliving.D.ShesoldDad'stoolstoatoollibrary.3WhatisavailabletothevisitorstotheSt.PaulToolLibraryA.Freeuseofthetools.B.AvisittotheMerrys'house.C.Dave'sinstructionsforusingthetools.D.Hoh'sshareoftheprofitfromthelibrary.4WhatcanbeasuitabletitleforthetextA.ArtofLivingB.SettingupaLibraryC.AFamily﹣runLibraryD.RecyclingThroughDonating
把两个全等的直角三角板ABC和EFG叠放在一起使三角板EFG的直角顶点G与三角板ABC的斜边中点O重合其中∠B＝∠F＝30°斜边AB和EF长均为4． 1当EG⊥AC于点KGF⊥BC于点H时如图①求GHGK的值 2现将三角板EFG由图①所示的位置绕O点沿逆时针方向旋转旋转角α满足条件0°＜α＜30°如图②EG交AC于点KGF交BC于点HGHGK的值是否改变证明你发现的结论 3三角板EFG由图①所示的位置绕O点逆时针旋转一周是否存在某位置使△BFG是等腰三角形若存在请直接写出相应的旋转角α精确到0.1°cos73.2°≈0.29若不存在说明理由．
WealwaysknewourdaughterKendallwasgoingbeaperformerofsomesort.She1peopleinoursmalltownbyputtingonshowsandsingingonourfrontporchwhenshewasonlythreeorfour. WhenKendallwasfivewebeganto2thatshewasblinkingalotandclearingherthroat3.Wehadhertestedforallergiesbutthedoctorsaidshewasn'tallergictoanythingatall.Aftertheproblem4wetookhertoourlocalchildren's5whereshewasdiagnosedwithTourette'sSyndrome. Itwasprettydevastating令人悲痛的becauseotherchildrenconstantlymadefunofherandsadlyevenateacher6her.Sheonlyhadoneortwofriendsbutthatwasokaybecausetheywere﹣﹣andcontinuetobe﹣﹣realthekindwho7hernomatterwhat.ThroughallthisKendallcontinuedtosingandentertain.Toour8herproblemdisappearedwhenshesang. In2005whenKendallwassixteen.wethoughtshewasprettymuchoutofthewoods﹣oratleastheadinginthatdirection9asifTourette'sSyndromewasn'tenoughforabeautifulyounggirltodealwithastrangeaccidenthappenedAtabirthdaypartyKendallwasseriouslyhurtinagameandwas10tothehospitalwhereshespentthenextweekparalyzedfromtheneckdown.Ironicallyherbiggest11wasn'twhethershewouldwalkagainbutwhethershewouldbeabletoaudition试镜forAmericanIdol. Sometimesweall12becauseofthepainwewitnessedButonthedayKendallwalkedintothestadiumtoauditionforAmericanIdol﹣an13threemonthsafterheraccident﹣wecriedtearsof14.AndourtearsturnedintoshoutswhenshewasgivenagoldentickettoHollywood. Kendalliseighteennowlivingeverydaytoits15.She'srecordedaCD.She'salsoonCMT'sMusicCityMadnessforanoriginalsongandvideoandishavingsomegoodsuccess. Whenshewasalittlegirltryinghardtobestrongshelooked16atme.herbigeyesfilledwithtearsandaskedmewhyshehadtohaveTourette'sSyndrome.Myheart17tomaketheworldrightformychild.ButIlookedrightbackatherandtoldherthe18asIseeit. KendallGodgaveyoua19heartanangelicvoiceastrongmindandabeautifulappearance.Withallofthat.hehadtomakeit20foreveryoneelse. 1A.treated B.entertained C.attracted D.showed 2A.notice B.know C.assume D.predict 3A.regularly B.fluently C.loudly D.frequently 4A.improved B.changed C.worsened D.arose 5A.school B.hospital C.museum D.charity 6A.helped B.comforted C.abused D.teased 7A.stickby B.turnto C.lookafter D.associatewith 8A.luck B.sorrow C.delight D.disappointment 9A.Therefore B.However C.Anyway D.Besides 10A.walked B.accompanied C.rushed D.invited 11A.concern B.dream C.problem D.disease 12A.laughed B.worried C.panicked D.cried 13A.mere B.uneasy C.precious D.desperate 14A.sadness B.despair C.joy D.regret 15A.happiest B.fullest C.simplest D.busiest 16A.down B.around C.forward D.up 17A.ached B.relieved C.lightened D.moved 18A.way B.story C.news D.truth 19A.sick B.broken C.pure D.fragile 20A.right B.similar C.different D.fair
假定英语课上老师要求同桌之间交换修改作文请你修改你同桌写的以下作文.文中共有10处语言错误每句中最多有两处.每处错误仅涉及一个单词的增加删除和修改. 增加:在缺词处加一个漏字符号∧并在其下面写出该加的词. 删除:把多余的词用斜线\划掉. 修改:在错的词下划一横线并在该词下面写出修改后的词. DearTom HowisitgoingKnowingthatyouareinterestinginChinesecalligraphyI'mwritingtotellyouit'smypleasuretohelpyoulearnthem. AsIhavebeenpracticingitformanyyearsIhavemuchvaluableexperienceandknowexactwhatyouneedforcalligraphy.SoIwillpreparesometoolthatareofgreatuseforyoulikethewritingbrushinkandpaperthatarenecessaryforpracticingcalligraphy.AsyouknowIhadpianolessonsfromMondaytoSunday.IwillbefreeonSundayafternoon.Thusyoucancometomyhomeat2:00p.m.oneverySundayifitisconvenientforyou. I'msurethatbylearnChinesecalligraphyyouwillhaveagoodunderstandingofChineseculturethaneverbefore.I'mlookingforwardyourreply. Yourssincerely LiHua
假如你是李华你的笔友Peter听说高考即将来临想了解一下你们如何备战高考请你回一封邮件说明相关情视内容包括: 1.想方设法掌握知识; 2.保持精力充沛 …… 注意:1.词数100左右 2.可以适当增加细节以使行文连贯; 3.开头和结尾已给出不计入总词数. DearPeter Iammorethandelightedtohearfromyou. Lookingforwardtoyourearlyreply! Yours LiHua
IntheworldofdigitalhealthSiliconValley﹣basedMindstrongstandsout.Ithasaremarkableteamandtensofmillionsoffunding.Italsohasafascinatingidea﹣itsappbasedonmentalfunctioningresearchcanhelpdetecttroublingmentalhealthpatternsbycollectingdataonaperson'ssmartphoneusage﹣howquicklytheytypeforinstance. Thecompany'sappcollectsinformationabouthowpeoplearetypingandrunsitthroughamachinelearningalgorithm计算程序todeterminewhichdatacanpredicttheiremotionalstate.Theideaistousethatdatatoestablishanormalpattern﹣soitcanbecomparedwithsomeone'stypinghabitsonanygivenday.Ifthehabitschangeslowerormoreanxiousthannormaltheappcanwarnahealthcareprovider. ThepromiseofthistechnologyhasmadeMindstrongincrediblypopularsinceitwaslaunchedlastyear;alreadymorethanadozencountiesinCaliforniahaveagreedtoapplythecompany'sapptopatients.DoestheappliveuptoitspromiseThere'snowaytotell.Almostnooneoutsidethecompanyhasanyideawhetheritworksleadingsomeexpertstowonderifthetechnologyisreadyfortherealworld.Iwouldn'twasteallthattimeandmoneyinthewilduntiltheygetsurethatsomeofthosethingsareasspecificastheyhopetheyaresaidRosalindPicardaresearcheratMITMediaLabwhoisfamiliarwithMindstrong'swork. Ithaspassedthegold﹣standardclinicaltestsfordepressionandanxietysaidDr.PaulDagumthecompany'sfounder.We'reconfidentandwe'realreadyseeingsomereallyexcitingresults.Mindstrongofficialssaidthatamongtheirmostencouragingresultsisthatitsappcanevenpredicthowapersonwillfeelnextweekkindoflikeaweatherappforyourmood.Foraclinicianorsomeonelookingafterapatienttheyknowthatitcouldbeveryverypowerful.Dagumsaid. 1WhatcanMindstrongsappdo A.Improveitsusers'mentalhealth B.Getitsuserstotypemorequickly. C.Discoveritsusers'mentalstate. D.Workoutthecausesofitsuser'trouble 2Whatisthesecondparagraphmainlyabout A.Thewaysofcollectingdata. B.Theapp'sworkingprinciple. C.Theanalysisoftypinghabits D.Thedevelopmentoftheapp 3WhatisRosalindPicard'sattitudetowardstheapp A.Skeptical B.Positive C.Uncaring D.Defensive 4WhatcanweinferaboutDagum'sopinionontheapp A.Theapphasapowerfuleffectonanxiety. B.Theappcanalsopredictweatherconditions. C.Careproviderscouldbeadvocatesoftheapp. D.Doctorsbenefitmorefromtheappthantheirpatients.
假定你是李华你的美国朋友Peter正在你们学校开展为期两周的交流活动.请你给他写封邮件邀请他一起去郊游欣赏中国美丽乡村.内容包括: 1.时间和地点; 2.特色乡村文化体验如赏美景看演出品美食等 注意: 1.词数100左右; 2.可以适当增加细节以使行文连贯.
WhenIwasaboyourextendedimmigrantfamilywouldsometimesgatheratmyaunt'stinyhouseoverthesummer.Relativesfromalloverthecountrywouldcomeintovisit.Theadultswouldcrowdtogetherinthelivingroomtotalkandcatchuponeachother'slives.Andthekidswouldbesentoutintothefrontyardtoplaywhendinnerwasslowlycookedforallofus. Thosewerethedaysbeforevideogamessmartphonesandmotorizedtoyssoweoftenendedupplayinganoldgame.Irememberoneofthosemomentsespecially.AsIwastheyoungestandsmallestofallthekidsthereIgotcaughtfirstandcouldn'tcatchanyoneelse.MybrothersandcousinswerealltoofastformeandIgrewmoreandmorefrustrated.Ifinallyfellmyfacefirstintothedirt.Igotupwithtearsforminginmyeyes.ThenIsawoneofmyfemalecousinsSusanstandingthere.Shestartedtorunbutwasgoingmuchslowerthanbefore.Ieasilycaughtupandseizedher.ThensheturnedtomesmiledandsaidI'mit!Youdbetterrun!Iranofflaughingwithgleewhilesheturnedandstartedtochaseothers. NowIseehowheractofkindnessthatdaysavedmefromsadnessandreturnedmetojoy.Itdidn'tmatterthatwehardlyeversaweachother.Iknowwearefamilyandshelovesme. Inherwonderfulbook:BoxofButterfliesRomaDowneywritesWearealloneweallbelongtoeachotherandweareonebig.beautifulfamily.Perhapsitistimethatweallstartedtotreateachotherthatway.Perhapsitistimethatwesharedourloveourkindnessourlaughterandourjoywitheveryonewithoutfear.Perhapsitistimetofinallyandforeverbringthisworldtogetherinonebigfamilyreunion. 1Whentheadultswerechattingthekidswould. A.playvideogames B.sitinthefrontyard C.learntocookdinner D.playtraditionalgames 2TheauthorwasabletocatchSusanbecause A.theothersrantoofast B.theauthorwasgoodatrunning C.Susangaveherachance D.Susanwantedtochaseothers 3Whatcanbeinferredfromthepassage A.TheauthorisgratefulforhatSusandidtoher. B.TheauthorcantmeetSusananymore. C.Theauthorurgesotherstolovetheirfamily. D.Theauthorbelievestheworldwillbecomeabigfamily 4Whatcouldbethebesttitleofthepassage A.Amemoryofmychildhood. B.Sharingofgoodnessunitesus C.Kindnessbrightensourlife. D.Agooddeedisinvaluable
如图作等边△ABC取AC的中点D以AD为边向△ABC形外作等边△ADE取AE的中点G再以EG为边作等边△EFG如此反复当作出第6个三角形时若AB＝4整个图形的外围周长是．
“白象”方便面的主要配料如下其中蛋白质含量丰富的是
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