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在“用DIS测电源的电动势和内阻”的实验，图（a）为实验电路图，定值电阻R0＝1Ω，R为滑动变阻器，图（b）为实验的实物连接图． （1）请用笔画线代替导线，按图（a）的连接完成该实物连接图 ...
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高三下学期物理《》真题及答案
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如图甲是测定电源电动势和内阻实验的电路图根据实验测得的几组I.U.数据作出U.﹣I.图象如图乙所示由
为测量一电源的电动势及内阻利用一个电阻箱一只开关若干导线和改装好的电压表此表用符号V1V2V3与一个
为测量一电源的电动势及内阻根据以上实验原理电路图进行实验读出电压表示数为1.50V时电阻箱值为15.
在测定电源的电动势和内阻的实验中用测出的数据画出了电源的U.一I.图象如图若E.r分别表示电池的电动
在实验室用伏安法测定电源的电动势和内阻现备有如下实验器材被测电源一节干电池电压表电流表滑动变阻器开关
2017河南天一大联考用伏安法测定电源的电动势和内阻所给器材如图甲所示已知电源的内阻很小.1请完成正
某同学设计了一个如图a所示的实验电路用以测定电源电动势和内阻使用的实验器材为待测干电池组电动势约3V
下面是在测某电池的电动势和内电阻的实验中记录的六组数据请在直角坐标系中画出U-I图象并根据图象算出待
某同学在测电源电动势和内阻实验中得到的U.—I.图线如图所示.则电源的电动势E.=V内阻r=____
图1为测定电源的电动势和内阻实验的电路图.图2是根据实验数据作出的路端电压U与电流I的U﹣I图象通过
下图是测定电源电动势和内阻的电路图如果在实验中当伏特表示数为1.4V时安培表示数为0.1A当伏特表示
利用如下实验仪器测量某电源的电动势E.和内电阻rA.电源电动势E.约为4.5V内电阻r约为1.5ΩB
如图11a所示是某同学用伏安法测电源的电动势和内阻的实验原理图及依实验所得的数据画出的坐标图如图11
某同学设计了一个如图1所示的实验电路用以测定电源电动势和内阻使用的实验器材为待测干电池组电动势约3V
在测定电源电动势和内阻的实验中某同学根据实验数据作出了正确的U.－t图象如图4所示其中图线斜率绝对值
短路电流
电源内阻
电源电动势
全电路电阻
某学生测量电源的电动势E.及内阻r所需的实验器材如图2所示.1在图1画出实验电路原理图.2用笔画线代
如图所示是测量干电池的电动势和内电阻的实验器材1画出实验电路图2用实线代替导线将实验器材连成实验电路
在测电源电动势和内阻的实验中根据实验数据作出的U-I图如右由图可知电源的电动势为E.=____V电源
9分在测一节干电池电动势和内阻的实验中某同学利用如图a所示的电路进行实验则电流表应选择量程填0.6A
小王同学用伏安法测某电源的电动势和内电阻实验原理图如图甲所示.请在图乙中用笔迹替代导线连接实验图.
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Ifyou'replanninganItalianvacationthereisawealthofinformationonlinethatyoucanaccessforfree.FindoutwheretogoandwhattoseewithanItalyblog. YounginRome Thisisagreatsitefortheyoungertravelers.Itscontentisprovidedbylocals.YounginRomemostlycentersonthingstodoandsee.Artexhibitionseventsandconcertstakeupmostofthefocus.ThereisalsoadailywordofthedaypostwhichwillhelpyouexpandyourItalianvocabulary. FodorsTravelBlog YoucanbenefitfromsomegreattipsfromFodorsTravelBlog.AwidevarietyofdestinationsarecoveredincludingItaly.CheckoutgreatpoststohelpyoufigureoutwhattodoandwhatnottodoinItaly.Ifyou'revisitingotherdestinationsinEuropethisisaveryhelpfulresource. ItalyBeyondtheObvious Thisisablogfortravelerswhowanttostayoffthebeatenpath.YouseemoreofthecultureofItalybykeepingclearorpopulartouristdestinations.TherearedescriptionsofWalkingandbikingsuggestions. SelectItalyBlog ThesiteoffersadviceonEuropeantravel.Therearealsopostsabouteventsandexhibitionsinthecountry.Thisisacompanyblogforatravelbusinesssoitalsooffersservices.Howeveryoudon'tneedtouseitsservicestotakeadvantageofthegreatadviceoffered. DreamtoItalyBlog ThisblogcoversnewsandcurrenteventsinItaly.YoucanfindseveraldifferentthingstodosuchastakingaclassatanItaliancookingschool.ThesitealsohasinformationonItalianrealestate房地产ifIwanttomakeyourvacationpermanent. 21.Whatisthepurposeofthispassage? A.ToencouragepeopletotourItaly. B.TogivetraveltipsforvisitingItaly. C.TointroducesomeattractionsinItaly. D.TorecommendsomeItalytravelblogs. 22.WhatdoFodorTravelBlogandSelectItalyBloghaveincommon? A.BothoffertraveladviceonEuropeantravelsincludingItaly. B.BothhaveavarietyofpostsabouteventsandexhibitionsinItaly. C.Bothhavehelpfulresourcesofferinggreattraveltipsandsevices. D.BothfocusonArtexhibitionseventsandconcertsItaly. 23.Ifyoudislikecrowdedtouristdestinationsyoumaygetusefulinformationfrom. A.DreamofItalyBlog B.YounginRome C.ItalyBeyondtheObvious D.SelectItalyBlog.
Ifyourlifefeelslikeitislackingthepowerthatyouwantandthemotivationthatyouneedsometimes61youhavetodoisshiftyourpointofview. Yourlifecanbeenhancedandyourhappiness62richwhenyou63choicetochangeyourperspective.Don't64yourfuturetochanceorwaitforthingstogetbettermysteriouslyontheirown.Youmustgointhedirectionofyourhopesandaspirations.Begintobuildyour65confidentandworkthroughproblemsratherthanavoidthem.Rememberthatpowerisnot66necessarytocontroloversituationsbutthe67abletodealwithwhatevercomesyourway. Alwaysbelievethatgoodthingsarepossibleandrememberthatmistakescanbelessonsthatleadto68discover.Takeyourfearandtransformitintotrust;learntoriseaboveanxietyanddoubt.Turnyourworryhoursintoproductivehours.Taketheenergythatyouhavewastedanddirectittowardeveryworthwhileeffortthatyoucanbeinvolvedin. Youwillseebeautifulthingshappenwhenyouallow69toexperiencethejoysoflife.Youwillfindhappinesswhenyouadoptpositivethinkingintoyourdailyroutineandmake70animportantpartofyourworld.
Theholidaysdon'thavetobehardonyourfigure.WeaskedpastwinnersofNBC'sTheBiggestLoserhowtheylosttheirweight. 1.Don'tlettheweatherstopyou. Thewinterwasfrighteningmeaway﹣IwasafraidIwouldn'tbeabletoexercise.SoI'mlearningtoplayicehockey曲棍球!Tokeepyourselfgoingfindthingsthatarefunforyou. ﹣HelenPhillipsseason7 2.Getbackupafteryoufall. Ilost214poundsonTheBiggestLoserbutfinallytheweightstartedtoreturnbecauseIstoppedmakingtheeffort.Ihadtoremember:goingtothegymisnotapunishment﹣it'ssomethingIdobecauseIcareaboutmyself. ﹣ErikChopinseason3 3.Rememberthatageisjustanumber. BeforeIwentontheshowIsatonthesofaandlivedmylifethroughtheTV.NowinadditiontoicehockeyI'vetriedrunningandI'vebecomearunner﹣andI'm50yearsold!Ifyouwanttolosetheweightaskyourself:isitthatIcan'torthatIwon't? ﹣HelenPhillips 4.Setsmallgoalsandcelebratewhenyoureachthem. Ineededgoalsdifferentthingstogoafterinaday﹣adistancethatyoucancoveroraweightgoal.WithoutthemIwasn'tcelebratingmyselfenoughandIgotreallygoodatbeatingmyselfup. ﹣AliVincent 5.Squeeze挤itin. WhenI'minthestoreI'lldolungesupanddownexercise.Inthecheckoutlineyoucoulddosquats.IusedtoworryaboutwhatpeoplethoughtofmebutIdon'tcareanymore.IknowI'mgoingtogetthelastlaugh. ﹣AliVincent 21.Whichofthefollowingpersonsadvisesustogobacktothegymoftenafterlosingweight? A.HelenPhillips B.ErikChopin C.AliVincent D.None 22.AccordingtothepassagewecaninferTheBiggestLoseristo. A.exerciseyourself B.maketheweightoff C.havefun D.playicehockey 23.AliVincentwantstoadvise. A.takingexerciseinwinterdays. B.gettingreallygoodatbeatingyourselfup. C.settingsmallgoalsandcelebratingwhenwesucceed. D.sittingonthecouchandlivingourlifethroughtheTV. 24.Thispassagemostlikelycomesfrom. A.ahealthreport B.anovelonlosingweight C.asciencemagazine D.anewspaper.
假定你是李华你的美国朋友Jack因爸爸过度饮酒而感到非常苦恼就此请你用英语给他写一封邮件.主要内容包括:1.表示安慰;2.给出建议;3.寄予希望. 注意:1.词数100左右;2.可以适当增加细节以使行文流畅;3.开头和结尾已给出不计入总词数. DearJack I'msorrytohearthatyourfatherisaddictedtodrinking. Bestwishes.I'mlookingforwardtoyourreply. Yours LiHua.
Sevenyearsagobackin2010somereportscoveredastorythattheworld'slongestrailwaytunnelwasunderconstructioninSwitzerland.Atthatpointithadalreadybeenunderconstructionforoveradecade.Ithadbeenvotedtobebuiltnearlyaquarterofacenturyago!Theideatobuilditcoulddatebacktonearly70yearsago﹣aboutasoldassomeofyourgrandparents! Yesterdayitwasfinallyready! It's35mileslongandruns7500feetbeneaththeSwissAlpsafamousmountainrangeinSwitzerland.Itevenrunsunderanoldtunnelthatwastherebefore.Ittookatotalof17yearstobuildatacostof$12billion128milliontonsofrockweredug.Twomilliontruckloadsofearthwereremoved! ThetunnelconnectsnorthernandsouthernEurope.TheopeningofthistunnelwassuchabigdealthattheGermany'sleaderChancellorAngelaMerkelFrance'spresidentFrancoisHollandeandItaly'sprimeministerMatteoRenziwerealltheretocelebrateaswasAustria'schancellorChristianKern. It'scalledtheGotthardBaseTunnel.Eventually325freightandpassengertrainswillgothroughthetunnelrelievingalotoftrafficontheroadwaysthereandmakingitamoreenvironmentallyfriendlyoption.TheGotthardBaseTunnelisawonderofengineering!Makeuswanttovisitit! 24.WhendidpeoplefirsthavetheideaofbuildingtheTunnel? A.About70yearsago. B.Halfacenturyago. C.Twentyfiveyearsago. D.Sevenyearsago. 25.WhatcanwelearnabouttheTunnel? A.Itusedtobeanoldtunnel. B.Ithasjustbeencompleted. C.ItconnectsallEuropeancountries. D.Itrunsoverarangeofmountains. 26.WhatmaybethepurposeofbuildingtheTunnel? A.Toimprovetraffic. B.Toincreaseemployment. C.Toattractdonation. D.Tostoppollution. 27.WhatcanbeinferredabouttheTunnel? A.Itwillcauseconflictsamongcountries. B.Itwillbeoflittlebenefittothelocals. C.Itmaydodamagetotheenvironment. D.Itmaybecomeatouristattraction.
下列抛物线有最高点还是最低点写出这些点的坐标抛物线y=-4x²+3x有最填高或低点该点的坐标是
WheretoDrink CafeSanBernardo Jointable﹣tennisandpool﹣playingport.CafeSanBernardohasbeenrunningsince1912.TheVillaCrespodivebaralsooffersuptablefootballfor￡4anhour.Serviceisefficient;withlastordersat5am.Thedailyhappyhourbetween6pmand9pmincludes60minutesplayingyourgameofchoiceplusahalf﹣bottleofredwineandacornpiefor￡9. ●AvenueCorrientes5436VillaCrespo541148053956cafesanbernardo.com MSalumeria&Enoteca Tradingonlyinwinewithastorysommelier侍酒师MarianaTortachoosesnewwaysonadailybasisandkeepsalistofaround250labels.There'snowinemenu﹣simplytakeyourbottlefromtheshelf. ●Open11:00am﹣11:30pmElSalvador5777PalermoHollywood541147789016onFacebook NegroCuevadeCafe CoffeehasfounditsplaceinBuenosAires.WhileLAB:TostadoresTheShelterandCoffeeTownarefamousnewplacesNegroCuevadeCafeisoneofthebestdowntown.ItservesEcuadorianColombianandBrazilianbeansanditsattractingcakesincludecroissant. ●Open9:30am﹣7:00pmSuipacha637Microcentro541143223000negrocuevadecafe.com LaCalle HeadtotheNicetoVegaaddressandyou'llbefacedwithapizza.Don'tworryit'stherightplace.LaGuitarritaisthefronttohiddenbarLaCalle.Orderthehousecocktailspecialcandyandpreparetosinguntildawnwithahigh﹣energyyoungcrowd. ●Open8:00pm﹣2:00amNicetoVega4942PalermoSoho541139141972onFacebook 21.Whichnumbershouldyoucallifyouwanttodosomesports? A.541147789016. B.541148553956. C.541143223000. D.541139141972. 22.WhencanyougotoMSalumeria&Enoteca? A.Allday. B.1:00am. C.3:00pm. D.10:00am. 23.WhatmakesLaCalledifferent? AItshavingspecialcandy. B.Itshavingnowinemenu. C.Itsallowingyoutoplaygames. D.Itsopeningforthelongesttime. 24.Whatlstheauthor'spurposeinwritingthetext? A.Toshowwineculture. B.Tointroducesomewinebars. C.Tohelppeoplechoosedrinks. D.Toshowhowtoenjoyyourself.
已知两个正数的和是60它们的积最大是多少提示设其中的一个正数为x将它们的积表示为x的函数
HowtoSleepBetter Ifyou'rehavingtroublegettinggoodsleepthroughthenightturningwakingupmorethanonceforexamplethistextwilltellyouwhatyoucandotoensureapeacefulnight'ssleep. 1.Getonschedule.Changingyoursleepingtimebymorethananhourcanseverelydisturbyoursleepquality.36Forexampleifyounormallywakeupat6amonweekdaystogettoworkyoumightgotobedaround10pmbecausethat'swhenyoustarttofeelsleepyandit'salsoagoodtimetoensure8hoursofsleep.Ifontheweekendyousleepuntil9amyouprobablywon'tbeabletofallasleepthatnightuntilIam. 2.Bemindfulofwhatyoueatordrinkbeforebed.37Digestionslowsdownwhileasleepandafullstomachmayinterruptsleep.Similarlyyoushouldavoidgoingtobedonanemptystomachasacompletelyemptystomachmayequallydisturbyoursleepingpatterns. 3.38Exposuretolightduringthetimewhenyou'resupposedtobesleepingcandestroyyourbody'sinternalclock.Turnyourlightofforuseaverydim暗淡的nightlight.39TheyincludewindowsLEDclocksandcomputerlights. 4.Changeyoursleepingposition.Youmaythinkthatit'simpossibletocontrolwhatpositionyousleepinsinceyouaren'tfullyawareofwhatyouaredoingbutitispossibleanditcanmakeaconsiderabledifference.40 A.Trytoavoidallsourcesoflight. B.Keeptheroomasdarkaspossible. C.Makenoteofunusualcircumstances. D.Waitatleastthreehoursafterdinnerbeforegoingtosleep. E.Sleepisconsideredtobeadequateonlywhenthereisnodaytimesleepiness. F.Inotherwordssuddenchangeofsleepingtimewillaffectyourbiologicalclock. G.Ifyouwakeupinthemiddleofthenightmakeanefforttohaveacomfortableposition.
Hereisatruestory.Amancameoutofhishometoadmirehisnewtruck.Tohissurprisehisthree﹣year﹣oldsonwashappilyscraping刮theshinypaintofthetruck61useasharpknife.Themanrantohissonanddrovehimaway.62scaretheboyranawayquickly.Unfortunatelytheboyfelldownandhurthisrighthand63seriouswiththeknifestickingintohisfingers.Thefatherrushedhissontothehospitalimmediately. Althoughthedoctortrieddesperately64savetheinjuredfingershefinallyhadtocutthemoff.Whentheboywokeupfromthe65operateheinnocentlysaidDaddyI'msorryaboutyourtruck.ThenheaskedBut66aremyfingersgoingtogrowback?Thefatherbegancryingsadly67hisheaddown. Thinkaboutthisstorythenexttimesomeone68steponyourfeetoryouwishtotakerevenge报仇.Thinkfirstbeforeyouloseyourpatiencewithsomeoneyoulove.Truckscan69repairbutbrokenbonesandhurtfeelingsoftencan't.Toooftenwefailtorecognize70differencebetweenthepersonandtheperformance.Weforgetthatforgivenessisgreaterthanrevenge.
求下列函数的最大值或最小值．y=1﹣2x﹣x2．
SCIENTISTSstudyit;anincreasingnumberofself﹣helpbookstellusthewaytofindit.InfactthepursuitofhappinesshasbeencalledtheultimategoalinlifebycountlesstalksTVshowsandnewspaperandmagazinecolumns.Howeverhappinessasitwasbeforeisstillhardtofind. USpsychologistEdDienerauthorofHappiness:UnlockingtheMysteriesofPsychologicalWealthmayhavetheanswer:acombinationoflifesatisfactionandhavingmorepositivethannegativeemotions.Howeverthismaysoundstraightforwardenoughbutitstilldoesn'texplainwhatdeterminespeople'shappiness.AndasTheWashingtonPostarguedinanarticleearlierthismonthcreatingadefinitionofhappinessthatistrueforpeoplearoundtheworldcanseemasdifficultasbeinghappy.Forexamplewhoishappier:someonewhohasenoughmoneytobuyanewmobilephoneorsomeonewhohasafamilydinnerafteryearsawayfromhome? Neverthelessasmanysurveyssuggestoneofthemostimportantpartsofhappinessiswealth.TheUN'sWorldHappinessReport2015showsthatcountrieswiththehighestlevelsofhappinessaredevelopedoneswithSwitzerlandIcelandandDenmarkmakingupthetopthree.ButontheotherhandBhutanoneofthepoorestcountriesintheworldwasnamedthehappiestcountryinAsiaandtheeighthhappiestintheworldinresearchbyBusinessWeekin2012. Perhapsthebiggestproblemishowtheideaofhappinessvariesindifferentculturesandlanguages. AsTheWashingtonPostnotedthewordhappycanrefertodifferentthingsinEnglish.Itmightmeanabriefmoodyoufeelwhensomeonesurprisesyouwithagiftoryouthinkoffriendsandfamily.Oritcouldrefertosatisfactionwithyourlife.Butnotalllanguagesrefertohappinessthesameway.InDanishforexamplehappinessisoftentranslatedaslykkeatermthatcandescribeeverydaywell﹣beingthatmightcomefromanicecupofcoffeeorasliceofbreadwithcheese.InChinesethewordforhappinessisxingfuwhichisusedtodescribeagoodlifeandalifewithmeaning.Foragoodmoodhoweverkuaileisusedmoreoften. AnotherdifferenceintheperceptionofhappinessasTheWashingtonPostputitisthatWesterncountriestendtohavequiteanindividualisticviewofhumanlife.InChinaandmanyotherAsiancountriessocialrelationshipswithfamilyinparticularareoneofthemostimportantfactorsinaperson'swell﹣being. Soareyouhappy?Andwhatmakesyouhappy? 32.WhatdoeshappinessinChinesemeanaccordingtothearticle? A.Individualisticviewofhumanlife. B.Everydaywell﹣being. C.Acombinationofsatisfaction. D.Agoodlifewithmeaning. 33.HowdoChinesepeopleandpeoplefromWesterncountriesviewhappinessdifferently? A.WealthisregardedasthemostimportantsourceofhappinessinWesterncountries. B.Socialinteractionplaysamoreimportantroleinaperson'swell﹣beinginWesterncountriesthaninChina. C.Familybondsarebelievedtobecloselyconnectedtoaperson'swell﹣beinginChina. D.ChinesepeoplegetmorehappinessfromtheirpersonalachievementsthanpeoplefromWesterncountriesdo. 34.Howisthearticlemainlydeveloped? A.Bygivingexamples. B.Byanalyzingcauseandeffect. C.Byfollowingtheorderoftime. D.Byaskingandansweringquestions. 35.Whichoneistrueaccordingtothearticle? A.Itishardertofindhappinessthanever. B.Alllanguagesdon'tlookathappinessinthesameway. C.It'ssafetosaythathappinessliesinwealth. D.It'snothardtogiveauniversaldefinitionofhappinessacrosstheworld.
TeathemosttypicalEnglishdrinkbecameestablishedinBritainbecauseoftheinfluenceofaforeignprincessCatherineofBraganzathequeenofCharlesII.AsaloverofteasinceherchildhoodinPortugalshebroughttea﹣drinkingtotheEnglishroyalcourtandsetatrendforthebeverageinthe17thcentury.ThefashionsoonspreadbeyondthecircleofthenobilitytothemiddleclassesandteabecameapopulardrinkattheLondoncoffeehouseswherepeoplemettodobusinessanddiscusseventsoftheday.ManyemployersservedacupofteatotheirworkersinthemiddleofthemorningthusinventingalastingBritishinstitutiontheteabreak.HoweverdrinkingteainsocialsettingsoutsidetheworkplacewasbeyondthemeansofthemajorityofBritishpeople.Itcamewithahighpricetagandteawastaxedaswell. Around1800theseventhDuchessofBedfordAnneMariabeganthepopularpractice ofafternoonteaaceremonytakingplaceataboutfouro'clock.Untilthenpeopledidnot usuallyeatordrinkanythingbetweenlunchanddinner.Atapproximatelythesametimethe EarlofSandwichpopularizedanewwayofeatingbread﹣inthinsliceswithsomethinglikejamorcucumbersbetweenthem.BeforelongasmallmealattheendoftheafternooninvolvingteaandsandwicheshadbecomepartoftheBritishwayoflife. Asteabecamemuchcheaperduringthe19thcenturyitspopularityspreadrightthroughallcornersoftheBritishsociety.ThusteabecameBritain'sfavoritedrink.Inworking﹣classhouseholdsitwasservedwiththemainmealofthedayeatenwhenworkersreturnedhomeafteraday'slabor.Thismealhasbecomeknownashightea.Todayteacanbedrunkatanytimeofthedayandaccountsforovertwo﹣fifthsofalldrinksconsumedinBritain﹣withtheexceptionofwater. 1Whatismainlydiscussedaboutteainthetext? A.ItsdevelopmentinBritain. B.Itstraditionalwaysofdrinking. C.Itsinfluencearoundtheworld. D.ItspopularityinEurope. 2Whatdoestheunderlinedwordsthebeverageprobablyreferto? A.Teadrinking. B.Asmallmeal. C.Awayofeatingbread. D.Achoiceofdrinks. 3WhywasteaunabletobeacceptedasacommondrinkinBritaininthe17thcentury? A.ItwasmerelyservedinLondon. B.Itwastaxedasanalcoholicdrink. C.Itwasforbiddeninbusinesssettings. D.Itwastooexpensiveformostpeople. 4Howisthetextorganized? A.Bycauseandeffect. B.Bycomparison. C.Intimeorder. D.Infrequencyorder.
你的美国朋友Rose要来中国参加汉语演讲比赛.她对比赛感到非常紧张特意发来电子邮件向你求助.请据此并结合下面的写作提示给她回一封信. 要点:1.赛前如何准备; 2.比赛中的注意事项; 3.祝她好运. DearRose Yourssincerely LiHua.
第一节短文改错 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11处起不计分. StudyingintheUKhavebeenagoodexperienceforme.WhenIfirstarrived.IfindlifeveryhardasIdidn'tknowanybodyhere.butIsoongottoknowotherChinesestudentattheuniversity.LaterIbecameinterestingincommunicatingwithpeoplefromvariousculturesandImadefewerfriends. Duringmystudy.Ichosetoliveinwithmyclassmatesinthedormitory.Ithinkit'sbetterthanlivinginBritishfamilybecauseIcanmeetpeoplefromdifferentcountrieseasy.Thecourseshereareexcellent.Ienjoythewaytheteachersgivelessons.WeareencouragedtothinkforyourselveswhichisquitedifferentfromthatIhaveexperiencedbefore.
用长为6m的铝合金型材做一个形状如图所示的矩形窗框窗框的高与宽各为多少时才能使它的透光面积最大最大透光面积是多少铝合金型材宽度不计
DearCarolyn MysisterstepandIgetalonggreat…aslongasourparentsaren'taround.Whenmymomandherdadaretheresheismeaneasilyoffendedeasilyoffensiveandit'sawful. We'vebeentalkingaboutplanningavacationforallofuswithmyyoungsontoDisneyWorldandit'salreadygottencontentious矛盾的.AverylargepartofmewantstosuggestthatwebreakthisupandjustgotoDisneywithmemysisterandmyson.ButifmyparentsgotheywillpayandIcan'treallyaffordtogoonmyown.MysistercoulddefinitelyaffordtopayforallofusbutIdon'tthinkIshouldaskforthat. Anyadvice?ThisissosoobviouslyabadideabutIdon'tknowhowtopullthisoff设法做成withoutlotsofhurtfeelings.IguessIcanjustgowithitandputupwiththeangerinexchangeforafreetriptoDisney?Ugh. ********************************************************************************** Familyvacationdisaster ThemostobviousOption1istobackoutofthetrip.Sayyou'renotcomfortablebeingpaidforandwouldliketopostponeuntilyoucansaveupforit. Option2istobemorestraightforwardwithyoursister:Idon'tknowifyou'venoticedthesamethingbutweseemtogetalongbetterwhentheparentsaren'taround.Butyouhavetobecarefulnottolaytheblameonher. Option3istogoonthetripasplannedbutwithadifferentattitudetowardyoursister.Someonewhoactsthewayyoudescribeisobviouslystressed.Canyouthinkofwhy?Canyoufindempathy感同身受;同感;共鸣? Canyouhelp?Ormaybejustcanyougetawaywhenitgetsbad? EvenifyougowithOption1or3fileaway2foranothertimetheunderlyingtensionbetweenyouthatspoilsyourtimewithyourparentsmustbeaddressed. 25.Fromthefirstletteritcanbeconcludedthatthewriterofthefirstletter. A.can'taffordtogoforatriptoDisneyalone B.isgoingtogoonavacationwithhersister C.hasgreatfunwithherparents D.willgotoDisneywithouthersister 26.FromthesecondletterwelearnthatFamilyvacationdisaster. A.shouldcancelthetripimmediatelyunlessshemakeupwithherparents B.shouldblamehersisterfornotgoingforthetrip C.shouldknowthathersisterisunderstressinfrontoftheirparents D.shouldfindempathywithherparents 27.WhatdoweknowaboutCarolyn? A.CarolynistheonewhowantstogoonatriptoDisney. B.Carolynisacolumnwriterwhohelpspeopleintrouble. C.Carolynisapersonwhoreceiveletter. D.CarolynisaworkerinDisney.
求下列函数的最大值或最小值y=100-5x²
Antsaretroublesomebestknownforitchybitesandruiningpicnics.ButanewspeciesofcrazyantistakingoverTexas.Insomewaystheyappeartobeworsethanfireantsandthere'snogoodwaytostopthem.Theseantsmovefastandareplentifulinsomeareas. ThecrazyantsfirstspranginPearlandin2002andhavebeenbecomingmoreandmoreofaproblemeversince.Aninvasionofthesecanbesoextremethatit'shardtocallitjustanuisanceUniversityofTexasentomologistEdwardLeBruntoldTheAustinAmerican﹣Statesman.Theantshavebeenknowntocrawlintoandruintelevisionsappliancesandotherelectronicdevices.NooneisentirelysurewhyHesaid. DavidOiaresearchentomologistattheDepartmentofAgriculturetoldTheNewYorkTimesin2013thestrangeideathattheantsareactuallyattractedtotheelectricityitselfcan'tberuledout. ThecrazyantsorRaspberryants﹣yepthat'sactuallywhattheyarecalled﹣arefoundin23Texascounties.Theantshaveverylittlevenom毒液butdocauseaslightstingwhentheybite.Mostlythoughthey'reahazardtoelectricalequipment. Theyarearelativelynewspeciesintheregionandlittleisknownabouthowtocontrolorkillthepopulation.Andunfortunatelytheredoesn'tseemtobemuchthatcanbedoneaboutthemrightnow.Soforthemomentthebestadviceisnottostayclosetoantpilesandgroupsandhopethatnonemakeitinsidetocrawlaroundtheelectronics. 28.WhatdotheantsdoinTexas? A.Bitesomepeople. B.Damagelocalcrops. C.Destroyappliances. D.Polluteenvironment. 29.TheunderlinedwordnuisanceinParagraph2isclosestinmeaningto. A.story B.visit C.problem D.failure 30.Whenmeetingwithantpileswe'dbetter. A.killthemall B.controlthem C.drivethemaway D.stayawayfromthem 31.Whatcanweknowfromthetext? A.ThecrazyantsfirstappearedinTexasin2013. B.ThecrazyantscausehugetosstothepeopleinTexas. C.Thegovernmentistakingmeasurestodealwiththeant. D.DavidOiissurewhytheantsruinelectronicdevices.
求下列函数的最大值或最小值．y=-6x2+12x．
Meaningfulrelationshipsmakelifemoreenjoyable.Inordertoattractanidealmateyou'llneedtospendsometimepreparingyourselftomakesureyou'rereadytobeinarelationshipwithanewperson. Definewhatanidealrelationshipmeanstoyou.Asyousetouttocreateyouridealrelationshipmakesureyouconsiderwhatyouwantfromit.36Ifyouwantattentionandaffectiontookforsomeonewhogivesyouthat. 37Oftenoneofthebiggestthingsthatcangetinthewayofyourfuturehappinessisyourpast.Inordertomoveforwardinyourlifeyouneedtosaygoodbyetoanythingyoumaybestrugglingwithfromyourpast.Creatinganidealrelationshiprequirescommitmenttothepossibilitiesofthefuturenotbitternessaboutthepast. Bepositive.Noonewantstobearoundsomeonewhoisbad﹣temperedorpessimisticallthetime.38Ifyouwanttofindanidealrelationshiptrytopicturethefutureasfullofopportunities.Nobodyisperfectbutbeingpositiveaboutyourselfandyourlifewillbeattractivetopotentialpartners. Worktowardspositivechangesinyourlife.39Oftenthesecharacterquirks怪癖arewhatmakepeoplelovableandmemorable.Yourfamilyandfriendsshouldloveyouinspiteofyourflaws.40Ofcourseyoushouldn'tchangeyourselfforsomeoneelseunlessitisapositivechangethatyouwanttomakeforyourself. A.Letgoofthepast. B.Everyonehasfaults. C.Welcomeyourfuturechallenges. D.Optimismattractsmoreoptimism. E.Workontalkingthingsoutevenwhenyou'reupsetatoneanother. F.Howevertherearethingsyouneedtoworkontoattractyouridealpartner. G.Ifyouarelookingforstabilityandsecuritysearchforapartnerwiththosequalities.
Andrewwasgoingforasalesjobinterview.Heknewhehadthe61littleexperiencetogetthejob.Infacthewasn'tevensurehowhe'dgottheinterview.62hedidknowwasthathewasverythankfulfortheopportunitygiventohim. Thoughtheinterview63gowellitwasimpressedonhimagainthat64comparewiththeothercandidateshedidn'thavetheabilitytogetthejob.Asheleftthebuildinghegavethereceptionist65envelope.Insidewasathank﹣younotefortheman66hadjustinterviewedhimthankinghimforhistimeandfortheopportunity. ThateveningAndrewgotacall67tellhimthathe'dgotthejob.Hisnewemployerknew68clearthatitwasn'tAndrew'squalificationsthatgothimthejobbuthisthank﹣younote.IfAndrewwasabletobethankfulatthisstagehewouldbeabletobuildpositiverelationshipswithhis69customerwhichwasexactlywhatthecompanywaslooking70.BeinggratefulwonAndrewthejob.
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短文.短文中共有10处错误每句中最多有两处.错误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∧并在此符号下面写出该加的词. 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; 2.只允许修改10处多者从第11处起不计分. LastSundayIwenttothemarketwithmymothertobuysomefreshlyvegetables.Mymotherspentalongtimebargainingbeforeshepaidforvegetablesshehadchosen.Shewantedtogetitatthelowestpricebecauseofshethoughtshecouldsavesomemoneyinthisway.Beforecomingbackshecookedsuchmanydishesthatwecouldn'teatthemall.Sowehadtothrowsomefoodsaway.Asaresultthemoneywewastedwasmuchthanthatsavedfrombargaining.Icouldn'thelpfeelconcerned.Ithinkthebestwaytosavemoneywastostopwasting.
下列抛物线有最高点还是最低点写出这些点的坐标抛物线y=4x²-4x+1有最填高或低点该点的坐标是
第一节完形填空 Ispentlastsummervolunteeringatahospital.Itwasagiftto41somanyamazingpeopleandI'dliketoshareoneofthesemoments.OnedayIwascalledtoaroomwherean42womanwasstaying.UsuallyIhelpedwith43whowerereadytoleave.Insteadshe44togotothegiftshop.Igota45helpedherintoitandheadeddowntotheentrance. Whenwegotthereitwasn'topenyet.Aftera30﹣minute46weenteredthegiftshop.AsIpushedheraroundIcouldseethe47inherfaceasshelookedateverythinghappytobeoutofherroom.She48somewindowdecorationsandthensawchocolates. Sheaskedmetopushherinthat49andthenIhelpedher50allthedifferentchocolatearrangements.51shedecidedonthreedifferentboxes. Shetoldmetowritethenumbers12and3ontheboxes.She52thatthenursesweretakingsuchgoodcareofhersoshe53chocolatesforeachofthethreeshiftsofnurses.Aswegavethecurrentshiftofnursestheirboxofchocolatethey54offeredsometomebeforetakingsomethemselves. Therewere55allaround.Witnessingtheoldlady's56andgettingtheopportunitytospendtimewithsomeonewhogotsomuchjoyfromlifewasa57initself.Ihavesomanymorestoriesandeachpersonmadeanimpactonmylife.I've58thathealthhasawayofbringingpeopletogether.59isablessingandbeinginaplacewherehealthisso60andappreciatedisunlikeanythingelse. 41.A.introduce B.meet C.attract D.describe 42.A.elderly B.strange C.important D.famous 43.A.nurses B.kids C.patients D.parents 44.A.pretended B.wanted C.failed D.promised 45.A.car B.shoppingcart C.wheelchair D.bike 46.A.ride B.walk C.drive D.wait 47.A.relief B.anxiety C.joy D.puzzle 48.A.chose B.made C.used D.received 49.A.manner B.case C.direction D.point 50.A.preparefor B.makeup C.figureout D.1ookthrough 51.A.Suddenly B.Eventually C.Fortunately D.Actually 52.A.explained B.declared C.expected D.imagined 53.A.exchanged B.designed C.tasted D.bought 54.A.infact B.ataloss C.inturn D.atease 55.A.whispers B.smiles C.shouts D.cheers 56.A.kindness B.choice C.decision D.1oneliness 57.A.1esson B.chance C.gift D.fact 58.A.concluded B.imagined C.predicted D.1earned 59.A.Health B.Luck C.Virtue D.Praise 60.A.tested B.valued C.maintained D.promoted
Peoplewhoseemtohavealltheluckarenotusuallyblessedbyalargeamountofgoodfortune.Theysimplyhaveahealthyattitudewhichenablesthemtomakethemostofsituations.Herearesometipsforcreatingyourownluck. 1.BeGratefulForWhatYouHave. Somepeoplearealreadyluckyandtheyjustdon'knowit.36Forexampleyouhaveahappyfamilysomewonderfulfriendsaroofoveryourheadandfoodonthetable.Byacknowledgingthesethingsregularlyyoucaninstantlyfeelluckier. 2.SeetheGoodinthePast Peoplesometimescomplainabouttheirpastforholdingthemback.Theyblametheirparentsortheirschoolingfornotsettingthemupforsuccess.Buthavingadifficultlifedevelopsstrengthsandqualitiesyoumightneverhavegotifyouhadn'tbeenthroughthosetoughsituations.37 3.BeGenerous Ifyouwantpeopletogiveyouopportunitiesyouhavetoconsiderwhatyoucandoforothers.38Begenerouswithyourtimeandattentionandyou'llbesurprisedhowmanyluckyopportunitiespeoplemayofferyou. 4.BeOpentoNewthings Luckdoesn'tjusthappenuponus﹣itcomestouswhenwe'reopen.39LearningnewskillsvisitinganewplaceortryingaDewhobbyareallgreatwaysofexpandingyouropportunitiesandyourmindset. 5.TakeAction 40Takestepstowardsyourgoalsanddreamsandgreeteverychallengewithapositivemindset.Youwillfindyoucreatemoreluckineverydaylife. A.Youcannotexpecttoreceiveifyounevergive. B.Sobegratefulforthegoodthatcamefromyourpast. C.Manypeoplespendtimethinkingaboutwhattheydon'thave. D.You'llnevercreateanyluckifyousittherewaitingforittocome. E.Tryingsomethingnewisagreatwayofgettingmoreopportunities. F.Butoftensuccesscomesfromgreatdeterminationratherthangoodluck. G.Lookathowluckyyoualreadyareinsteadoffocusingonwhat'slacking.
Thetermhelicopterparentsreferstoastyleofparentswhoareoverfocusedontheirchildren. Helicopterparentsarealwaysmakingabigpushtoprovidechildrenwitheveryopportunitytosucceedfrombabystepsatage1homeworkatage8collegeapplicationatage18employmentissuesatage25tofamilyproblemsatage3040orevenolder.Theyconstantlyshadowthechildalwaysdirectinghisbehaviorallowinghimzeroalonetime. Helicopterparentingcandevelopforanumberofreasons.Worriesabouttheeconomythejobmarketandtheworldingeneralcanpushparentstowardtakingmorecontrolovertheirchild'slifeinanattempttoprotectthem.Adultswhofeltunlovedorignoredaschildrencanovercompensatewiththeirownchildren.Whenparentsseeotheroverinvolvedparentsitcancauseasimilarresponse.Theyfeelthatiftheydon'tinvolvethemselvesintheirchildren'slivestheyarebadparents. Themainproblemwithhelicopterparentingisthatitcanbackfire.TogiveanexamplethehousewhereMarylivedwithroommateswasbrokenintoandthingswerestolen.Marycalledthelandlord房东toinstallanalarmsystembutbeforeshecouldfinishthenegotiations协商hermotherrushedinanddemandedaction.Ifeltlikemymotherruinedmycommunicationwithourlandlord.Wecouldhavegottenitdoneourselves.ShewaswellintendedbutonlymademefeelannoyedanddefeatedsaysMary. Obviouslyoverparentingismotivatedwiththeideaofdoinggoodthingsbutitdoestheexactopposite.Inthelongrunparentsareactuallydamagingtheirchild'sbasicskillstodealwithmattersindependently.Itmakesthechildfeellackinginconfidencelesscompetentindealingwiththestressesoflifeontheirown.They'rewinningthebattlebutactuallylosingthewar. 29.What'sthepurposeofhelicopterparents'overparenting? A.Todosomethinggoodfortheirchildren. B.Tomaketheirchildrennotignored. C.Tohelptheirchildrenfindagoodjob. D.Togetridofthepressurefromotherparents. 30.Whatcanwelearnfromthepassage? A.Childrenwhohavehelicopterparentsliveahardlife. B.Helicopterparentingonlyhappenstoveryyoungchildren. C.Helicopterparentscanprotecttheirchildrenagainstallproblems. D.Helicopterparentsdotheirchildrengreatharminthelongrun. 31.Whatwillpossiblybediscussedintheparagraphthatfollows? A.Thebadeffectsofhelicopterparenting. B.Howwecanavoidbeinghelicopterparents. C.Differentopinionsabouthelicopterparenting. D.Thereasonsforthedevelopmentofhelicopterparents. 32.Whatistheauthor'sattitudetowardshelicopterparenting? A.Uninterested. B.Objective. C.Positive. D.Disapproving.
MymotherandIneverhadoneofthosenicedressinmatchingmother﹣daughterclothesrelationships.Intheconfuseduncertainmindofateenagerthis41toShedoesn'tcareunderstandorloveme.42Iwasquitesurethatshehadnoideawhatlovewasreallyallabout.43shewasmoppingthefloorscookingmealsandraisingfivechildrenIwaslisteningtothemusicreadingpoetryandexperiencingthe44oflove. Asthewinterofmysixteenyear45thetensionbetweenusgrew.LookingbacknowIrealizethatItookeveryopportunitytolashoutat抨击herinan46tolessenmyowninsecurity.AndthatisexactlywhatIdidwhensheunpackedthatoldgreencoatofhers.Well﹣wornand47IdirectlytoldherthatIcouldnotbelieveshewould48itforanotherseason.ShebegantosaysomethingaboutnothavingthemoneyforanewcoatbutIwasalreadysayingphraseslikeWhenIamolderIwillhaveabeautifulandrich﹣lookingcoat.Iwouldn'tbe49deadwearingaraglikethat. Christmasmorningwasalwaysan50timeinourhouseandthatyearwasnoexception.Thesoundoflaughterkidsyellingandpaperrippingfilledthelivingroom.ThoughItriedtokeepcalmIwas51toseewhatSantahadbrought.Onelargebrightlywrappedboxwithmyname52myattention.Iquicklytoreitopen.InsidewasthemostbeautifulIhadeverseen.Brownsuede绒面革大衣withawhitefurcollaritwasnicerthananythingIhad53dreamtofowning. LookingupIcaughtmymother's54.IthoughtoftheoldgreencoatandinstantlyI55howpreciousthisgiftreallywas.Mymotherknewwhatacoatlikethiswouldmeantomeandshewaswillingto56heroldcoatsothatIcouldhaveit.Hereyesgleamedwithjoyasifitwereshewhohadreceivedtheverybestgift.57thetruemeaningoflovewascleartome. IwishIcouldtellyouourrelationship58changedintoalovingandgivingoneafterthatdaybutthatonlyhappensinthemovies.Westillfoughtandfound59witheachotherbutIalways60aspecialplaceinmyheartwhereIlovedherandIknewthatshelovedme. 41.A.translated B.handed C.awarded D.brought 42.A.Really B.Actually C.Obviously D.Slightly 43.A.Although B.Once C.If D.While 44.A.excitement B.disappointment C.surprise D.satisfaction 45.A.approached B.advanced C.changed D.left 46.A.effect B.effort C.order D.experiment 47.A.outoforder B.outofplace C.outoftime D.outofstyle 48.A.keep B.choose C.wear D.remain 49.A.grasped B.seized C.caught D.held 50.A.satisfactory B.thrilling C.moving D.astonishing 51.A.concerned B.upset C.worried D.anxious 52.A.pushed B.pulled C.drew D.paid 53.A.already B.ever C.even D.still 54.A.eyes B.attention C.head D.coat 55.A.thought B.realized C.admitted D.spotted 56.A.getawaywith B.comeupwith C.makedowith D.catchupwith 57.A.Suddenly B.Finally C.Clearly D.Indeed 58.A.terribly B.beautifully C.wonderfully D.magically 59.A.proof B.mistake C.error D.fault 60.A.carried B.settled C.held D.stayed
假设你是红星中学高三1班学生李华.在高考前剩下的日子里你的朋友Peter想了解你的计划请你给他写一封回信.信的内容包括: 1.你的计划和愿望是什么? 2.你打算如何实现你的愿望. 注意: 1.词数100左右; 2.可以适当增加细节以便行文连贯; 3.短文中不能出现与本人相关的信息. DearPeter Yours LiHua.
ThereareprobablynopeopleonEarthwholiketogossipasmuchastheBritish.Ifpryinginto打探other'sliveswereanOlympicsportthenTeamGBwouldsurelytakethegoldmedal. AndwhentheBritishcan'twatchthelivesofrealpeopletheyhaveanothersourceofentertainmenttofallbackon﹣thesoapopera.BritishsoapoperasareverydifferentfromUSTVdramas.Foronetheyarenormallylongerrunning.ThetwomostpopularCoronationStreetandEast﹣endershavebeenrunningfor48and24yearsrespectively.Botharebroadcastseveraltimesaweeksoremarkablytherehavebeenmorethan7000episodesofCoronationStreet. ThemostobviousdifferenceisthatunlikeUSdramastheBritishsoapoperasfocusontherealworld.Thereislittleglamour魅力thestarsarerarelyrichandtheynormallyhaveboringjobs.Perhapstheappealisthatthelivesofthecharactersoftenmirrorthelivesoftheaudience﹣butwithsomedramaadded.Thismeanstheviewercanrelatetothecharactersandfeelthepainandhappinesstheygothroughontheshow. BecausethesesoapoperaslastfordecadesthecastiseverchangingTheshowsrarelyfocusononeortwomaincharacters.Liketherealworldpeoplecomeandgoallthetime.Howeverthereareexceptions.Street'swilliamRoach76hasplayedtheroleofKenBarlowsincetheveryfirstepisodeoftheshowin1960andheisstillaregular. Thechoiceofwhichsoapoperayoufollowisoftencultural:PeoplefromthenorthofBritishtendtowatchCoronationStreetasitissetinManchester.PeoplefromthesouthgenerallypreferEast﹣enderswhichissetintheeastofLondon.Theshowisgenerallyconsideredgrittierandisaimedatayoungeraudience. 28.WhatisthemaindifferencebetweenAmericandramasandBritishsoapoperas? A.Americandramasarelonger. B.Britishsoapoperasarelonger. C.Americandramasdealwithdangerousthings. D.Britishsoapoperasdealwithrealpeople. 29.WhydoBritishpeopleliketowatchsuchoperas? A.Theycanfindtheirownlifefromtheoperas. B.Theycanenjoytheoperasintheirfreetime. C.Theycanwatchtheoperasformanyyears. D.Theycareaboutthefateofthecharactersintheoperas. 30.Theunderlinedworldepisodesinthe2ndparagraphprobablymeans. A.plays B.pages C.issues D.parts 31.OnecharacteristicofBritishoperasisthat. A.thecharactersplaythesameroleforalongtime B.thecharactersintheplayoftenchange C.peopledon'tknowwhatwillhappennext D.thereisonlyoneortwocharactersinthem.
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