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如图，固定的水平光滑平行轨道左端接有一个R＝2Ω的定值电阻，右端与竖直面内的圆弧形光滑金属轨道NP、N′P′平滑连接于N、N′点，两圆弧轨道的半径均为r＝0.5m，水平轨道间距L＝1m，矩形MNN′...
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高三下学期物理《》真题及答案
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如图所示有两根和水平方向成α角的光滑平行的金属轨道上端接有可变电阻R.下端足够长空间有垂直于轨道平面
如果
增大，v
m
将变大 B.如果 α 增大，v
m
将变大
如果R.增大，v
m
将变大
如果R.增大，v
m
将变小
如图所示电阻r=0.3Ω质量m=0.1kg的金属CD垂直跨搁在位于水平面上的两条平行光滑金属轨道上两
如图所示相距为L.的两条足够长的光滑平行金属导轨与水平面的夹角为θ上端接有阻值为R.的定值电阻匀强磁
如图所示光滑半圆轨道竖直放置半径为R.一水平轨道与圆轨道相切在水平光滑轨道上停着一个质量为M.=0.
如图所示光滑金属直轨道MN和PQ固定在同一水平面内MNPQ平行且足够长两轨道间的宽度L=0.5m轨道
如图11所示abcd为平行金属板两板左端与电阻不计的光滑平行金属轨道相连两板右端接有电阻R匀强磁场垂
如图光滑金属直轨道MN和PQ固定在同一水平面内MNPQ平行且足够长轨道的宽L.＝0.5m.轨道左端接
如图所示水平光滑的平行金属导轨左端接有电阻R.匀强磁场B.竖直向下分布在导轨所在的空间内质量一定的金
如图所示水平光滑的平行金属导轨左端接有电阻R.匀强磁场B.竖直向下分布在导轨所在的空间内质量一定的金
回路中产生的内能不相等
棒运动的加速度相等.
安培力做功相等
通过棒横截面的电量相等.
如图所示左端接有阻值为R.的电阻一质量m长度L.的金属棒MN放置在导轨上棒的电阻为r整个装置置于竖直
如图所示两条相距l=0.20m的平行光滑金属导轨中间水平两端翘起中间水平部分MNPQ长为d=1.50
如图所示光滑金属直轨道MN和PQ固定在同一水平面内MNPQ平行且足够长两轨道间的宽度L.＝0.50m
如图一端接有定值电阻的平行金属轨道固定在水平面内通有恒定电流的长直绝缘导线垂直并紧靠轨道固定导体棒与
F
M
向右
F
N
向左
F
M
逐渐增大
F
M
逐渐减小
如图所示两根相互平行间距为L.的光滑轨道固定在水平面上左端接一个阻值为R.的电阻轨道电阻不计质量为m
如图所示有两根和水平方向成θ角的光滑平行的金属轨道上端接有可变电阻R.下端足够长空间有垂直于轨道平面
如果只增大θ，v
m
将变大
如果只增大B.，v
m
将变大
如果只增大R.，v
m
将变小
如果只减小m，v
m
将变大
如图所示空间存在竖直向上的匀强磁场磁感应强度B=0.50T两条光滑的平行金属导轨固定在同一水平面内导
如图所示光滑半圆轨道竖直放置半径为R.一水平轨道与圆轨道相切在水平光滑轨道上停着一个质量为M.=0.
江苏省镇江市2017高三三模CDEF是水平放置的电阻可忽略的光滑水平金属导轨两导轨距离水平地面高度为
如图所示一端接有定值电阻的平行金属轨道固定在水平面内通有恒定电流的长直绝缘导线垂直并紧靠轨道固定导体
F
M
向右
F
N
向左
F
M
逐渐增大
F
N
逐渐减小
如图所示光滑半圆轨道竖直放置半径为R.一水平轨道与圆轨道相切在水平光滑轨道上停着一个质量为M.=0.
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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.
已知复数z满足1+i•z＝1﹣i则z的共轭复数＝
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.
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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