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如图甲是灯泡L和电阻R的I﹣U关系图象，灯丝电阻受温度的影响，温度越高其电阻越大．将L和R以两种不同的方式接在同一电源上，如图乙和两．若乙图中U1：U2＝m，丙图中I1：I2＝n，则下列关系式中正确...
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如图甲所示的电路小灯泡L.标有6V3.6WR.为滑动变阻器电源电压保持不变闭合开关S.后滑片P.从b
如图甲是灯泡L和电阻R的I﹣U关系图象灯丝电阻受温度的影响温度越高其电阻越大．将L和R以两种不同的
m＝n
mn＜1
mn＝1
mn＞1
在图甲所示的电路中已知电源为电压可调的直流电源R0是滑动变阻器R.是定值电阻图丙是灯泡L.的U.﹣I
某小组用如图所示的电路实物装置测绘额定电压为4.0V的小灯泡的伏安特性曲线其中小灯泡的电阻约为几欧电
如图甲是灯泡L.和电阻R.的I.-U.关系图像灯丝电阻受温度的影响温度越高电阻越大.将L.和R.以两
m=n
m=
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如图甲是灯泡L.和电阻R.的I.-U.关系图像灯丝电阻受温度的影响温度越高电阻越大.将L.和R.以两
m=n
m=
m＜
m＞
2015•岳阳如图甲是电阻R.和灯泡L.的U-I图像由图可知电阻R.的阻值是Ω若将电阻R.和灯泡串联
小宇用如图甲所示电路对一只标有0.8A字样的小灯泡L.进行了测试电源电压恒为9V电阻箱R.0的阻值可
如图甲是灯泡L.和电阻R.的I.-U.关系图像灯丝电阻受温度的影响温度越高电阻越大.将L.和R.以两
m=n
m=
m＜
m＞
图甲是利用伏安法测小灯泡电阻的实验电路图图乙是根据实验数据画出的通过小灯泡的电流I.与它两端电压U.
如图甲是灯泡L.和电阻R.的I.-U.关系图像灯丝电阻受温度的影响温度越高电阻越大.将L.和R.以两
m=n
m=
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2015·岳阳如图甲所示是电阻R.和灯泡L.的U.－I.图像由图可知电阻R.的阻值是________
如图甲所示是电阻R.和小灯泡L.的U.﹣I.图象由图可知电阻R.的阻值是__________Ω若将电
如图甲所示为分别测量小灯泡L.和定值电阻R.后得到的I.﹣U.关系图象.把灯泡L.和电阻R.接在电源
小明要分别测量如图甲所示的三个定值电阻和规格为3.8V小灯泡的阻值电源电压均为4.5N.1请参照测定
某同学用图甲所示的电路测绘额定电压为3.0V的小灯泡伏安特性曲线并研究小灯泡实际功率及灯丝温度等问题
小宇用如图甲所示电路对一只标有0.8A字样的小灯泡L.进行了测试电源电压恒为9V电阻箱R.0的阻值可
2.00分如图甲是灯泡L和电阻R的I﹣U关系图象灯丝电阻受温度的影响温度越高其电阻越大．将L和R以
m=n
mn＜1
mn=1
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如图7所示是分别测量定值电阻R.和小灯泡L.两端电压和通过的电流后得到的U.－I.关系图象由图可知定
如图所示甲为定值电阻R的U﹣I图象乙为小灯泡的电阻RL的U﹣I图象将定值电阻R和小灯泡RL串联在电
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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. Highschoolisatimewhichwemaymeetmanygoodteachers.WhenIwasinSeniorOneImetmychemistryteachercallingJohnwhodevotedhimselfinteaching.Hetriedhisbesttomakeherclasseslively.Heusuallymadegoodpreparationsforthelessonsandwasstrictwithustoo.Wheneverwemademistakesinourhomeworkhewouldaskustocorrectingthem.Iwasusedtobepoorinchemistry.Heoftenhelpsmewithmystudiesverypatient.BecauseofhishelpImaderapidprogressesandcaughtupwiththeclass.Hewasalwaysverykindtoeverystudent.Asexperiencedteacherhewasrespectedandlovedbyallthestudents.
设数列{an}的前n项和为Sn已知S2＝6an+1＝4Sn+1n∈N*． I求通项an Ⅱ设bn＝an﹣n﹣4求数列{|bn|}的前n项和Tn．
从abc中任取两个字母排成一列则不同的排列种数为
AlabamaPriester'sPecans DessertintheSouthbasicallystartsandendswithanooey﹣gooeypecan核桃pie.EspeciallyinAlabamawherethepecanistheofficialstatenut.WhilethereareplentyoffarmsthatpickandpackagepecansperhapsthemostfamousisPriester'safamily﹣runbusinessthat'sbeensupplyingAlabamawithitsfavoritenutsforoversevendecades. AlaskaSalmonjerky Forgetbeefjerky肉干﹣inAlaskait'sallaboutthesalmonjerky.Hometofivedifferentspeciesoftheflavorfulfishkingredpinksilverandchumthenorthernmoststateproducesnearlyone﹣thirdofthewildsalmonconsumedaroundtheworld.BonusSalmonisoneofthesevenhealthiestfishyoucaneat. ArizonaSaguarocactus Thelargestcactus仙人掌intheUnitedStatesthesaguarocactusisfoundonlyinArizona'sSonoranDesert.Livingtobeupto200yearsoldthecactiwhoseflowerisalsothestate'sfloweraregenerallyaround30feettallandcangrowunlimitedarms.Wanttoseeforyourself?Visitoneofthese10outstandingdesertescapesinAmerica. CaliforniaWineGuide Itisn'tcalledWineCountryfornoreason.NorthernCaliforniaspecificallyNapaValleyandSonomaValleyproduceover60000registeredwinelabelsmakingvino酒类产品thestate'smostvaluableagriculturalproduct.Ifyou'relookingforthemostpopularvarietals优质酿酒葡萄汁thetoptwofrequentlyplantedgrapesarechardonnayandcabernetsauvignon. 1HowlonghasthePriester'sfarmlasted? A.About7years. B.About30years. C.About70years. D.About200years. 2Whichstateisfamousforsalmon? A.Alaska. B.Arizona. C.Alabama. D.California. 3Wheredoesthetextprobablycomefrom? A.Alibraryguide. B.Anewsreport. C.Aprojecthandbook. D.Atravelguide.
Onenight1winterabearcameintothecityinVancouverCanada.Itwalkedthroughthecitystreetspasthousesshopsandoffices.Thenit2findsomefoodinbinsoutsidearestaurantandstartedeating.Inthemorning.someonesawthebearandcalledthepolice.Thepolicecamewithavet兽医fromthecityzoo.Theyputthebearinalorryandtookittothemountainsoutsidethecity3luckythebearwassafe.But4happensinothercountrieswhenbiganimalscomeintocities?InVancouveritisunusual5seeabearbutinsomecitiesyoucanseebiganimalsonthecitystreetseveryday.Biganimalsusuallycomeintocitiestofindfood.InCapeTowninSouthAfricababoons狒狒comeintothecitywhentheyare6hunger.Humanfoodisverybadforthebaboons7toothbecauseithasalotofsugar.NowthereareBaboonMonitorsworkinginCapeTown.8theyjobistofindbaboonsinthecityandreturnthemtothecountryside.InBerlininGermanypigssometimescomeintothecityforfood.Theyeatflowersandplantsinparksandgardens.Sometimestheyeatvegetablesfromgardens9theywalkinthestreetcausingaccidents.Somepeoplelikethepigsandtheygivethemfoodandwatertodrink.Otherpeopledonotlikethepigsandtheywantthegovernmentandthepolicetostopthem10enterthecity.
Travelingbysubwaycansometimesbequiteanadventureespeciallyduringrushhour.Therearethetimeswhenyouhavetoavoidcupsofcoffeethatcouldspill溅onyou.Thesmellsofsomepassengers'foodareverystrongtoo.AccordingtotheBeijingsubwaypassengerregulationswhichwentintoeffectonMay15thpassengersexceptbabiesandthesickarenolongerallowedtoeatordrinkonthesubway.Violators违反者whodonotstopafterbeingaskedtowillbeaskedtogetoff.Theviolationwillalsoberecordedintheviolators'creditrecord Somesupporttherule.Thereasonisthatthesmelloffoodanddrinkcanannoyotherpassengers.ThesmelloffoodfillsthecarriagecausingpeoplediscomfortespeciallyinthehotsummerBesideseatingonthesubwayproducesrubbish.AndonsubwaytrainspeopleoftenspilltheirdrinkssaidZhengYiou17astudentfromHefei. Howeverothersquestionthisrule.Somecitizenslivesofarfromtheirworkplacesthattheyhavelimitedtimetohavebreakfastbeforetheygotowork.EatingwhiletheytravelsavesthemtimeanddecreasesthechancethattheywillbelateforworkHeSonglina17﹣year﹣oldstudentfromChengdusaidAndsomepeoplelikethosewithlow﹣bloodsugarlevelsgetsickiftheycan'teatwhentheymust. OtherChinesecitieslikeNanjingandChengduhavesimilarregulations.Someforeigncitiesalsobaneatinganddrinkingonthesubway.ForexampleeatinganddrinkinghavelongbeenbannedonthesubwayinWashingtonDC.Singaporefinespeoplewhoeatordrinkonthesubwayupto500SingaporedollarswhichisRMB2417yuan. ChenYanyanaprofessorfromBeijingUniversityofTechnologybelievedweshouldconsidertheneedofsomepeopletoeatordrinkonthesubway.Commuters上班族andtravelersaresometimestoobusytoeat.MaybewecouldlearnfromTokyowheretherearemanysubwaystationsequippedwithservicesallowingpassengerstoeatanddrinkshesaid. 1InwhichcitywassubwaypassengerregulationscarriedoutonMay15th? A.Chengdu. B.Nanjing. C.WashingtonDC. D.Beijing. 2What'sthepunishmentforthepassengerswhobreaktherulesinSingapore? A.Eatingonthesubway. B.Drinkingonthesubway. C.Beingfinedupto2417yuan. D.Beingaskedtogetoffthetrain. 3WhatisChenYanyan'sattitudetoeatingordrinkingonthesubway? A.Worried. B.Sympathetic. C.Doubtful. D.Uninterested 4Whatwouldbethebesttitleforthetext? A.FoodandDrinkBannedonSubway. B.TheAdventureofSubwayTraveling C.WaystoEatandDrinkonSubway. D.TheServicesonSubwayStations
已知等差数列{an}的前n项和为sn且a₂＝2a6＝6． 1求an 2求Sn
12345中任取2个不同的数事件A＝“取到的2个数之和为偶数”事件B＝“取到的2个数均为偶数”则PB|A等于．
SheriStrailyneverknewhowfarlife'shighwaycouldtakeheruntilherdreamforherchildrenhelpedherfindoutGrowingupSheri1thoughtforamomentthatshe'd2ittocollege.3shetookajobdrivingatractortrailer.4yearspassedSherifellinlovemarriedandhadthreechildren.Becauseshewantedtobeclosetohomeshe5toadeskjobatthetruckingcompany.ButonedayafterworkwhileSheriwas6herkidsplayingshebegantothink'IwantthemtoachievesomuchbuthowcanIaffordtogivethemthe7they'llneedlikecollege?'Thenitcametohershewastheonewhoneeded8first.'9forit'herhusbandencouragedher.SoSherienrolledattheUniversityofDenver'sWomen'sCollege10lethertakeallofherclassesonweekendssoshe11stillwork.ThoughSherilovedher12shemissedhome.Sheriwouldstayathomeonweekends.13makethetwo﹣hourtriptoschool.'IwishIwerehomewithSteveandthe14'she'dthink.ButEriceightRyansevenandKristinfive15theirmomalltheway.'16doyourbest'theysaid.SherididgettingstraightA'sassheentereda17inbusinessadministration.Nowsheis18theUniversityofDenverLawSchoolonameritscholarship.'Ithasn'tbeen19'wroteSheri'butit's20formeandmyfamily.'1A.ever B.just C.never D.even2A.hit B.make C.admit D.have3A.Then B.Therefore C.Instead D.Natuarally4A.Since B.With C.While D.As5A.switched B.returned C.asked D.sought6A.finding B.noticing C.seeing D.watching7A.career B.money C.jobs D.opportunities8A.school B.college C.help D.assistance9A.Go B.Search C.Get D.Come10A.that B.where C.which D.as11A.need B.must C.should D.could12A.teachers B.classmates C.studies D.job13A.Ratherthan B.Otherthan C.Aswellas D.Lessthan14A.husband B.relatives C.parents D.kids15A.opposed B.backed C.agreed D.liked16A.Rarely B.Just C.Still D.Never17A.degree B.work C.job D.interview18A.learning B.attending C.enjoying D.joining19A.difficult B.unusual C.easy D.ordinary20A.rewarding B.interesting C.moving D.demanding
甲乙两人参加一次英语口语考试已知在备选的10道试题中．甲能答对其中的6道乙能答对其中的8道規定每次考试都从备选题中随机抽出3道题进行测试至少答对2道题才算合格则甲乙两人至少有一人考试合格的概率为
在5件产品中有3件一等品和2件二等品从中任取2件那么以为概率的事件是
AfewyearsagowhenIbeganwritingabouteducationschoolleadersdidn'tworrymuchaboutteachers.Theybelievedalonglineofnewteacherswaited.Notanylongerasdistrictsstruggletofillmathscienceworldlanguageandspecialeducationjobs. A2017LearningPolicyInstitutestudyfound90percentofopenteachingpostsaretheresultofpeopleleavingtheprofession.Whileretirementsplayarolethereportnotedtwo﹣thirdsofteachersleaveforotherreasonsmostsayingdissatisfactionswiththejob. Howcandistrictssupportteachersandpersuadenewonestoenterthefield? EducationprofessorPeterSmagorinskysaidThebestwayIknowoftosupportteachersistolistentothem.Teachersknowbetterthananyonehowschoolsworkwhatkidsneedwhatteachersneedtodotheirbestwork.Butkidsandteacherswon'talwaysagreeandyouwillgetoppositesuggestions.Butatleasttheyfeelrecognizedconsultedlistenedtoandrespected. HighschoolprincipalBetsyBockmansaidWhatItrytoinformFirstlyeveryone'sjobistodoallwecaneverydaytosupportstudents.SecondlyfortheemployeeswhoarenotteachersatGradyourjobistoremoveeverysinglebarrierthatkeepsteachersfromteaching. Makethejobofteachingeasier. Vice﹣presidentGaryMcGiboneysaidTeachersdevelopwellinaschoolwithapositiveschoolclimatewheretheydon'tfeelalonewhichiswhatteachersdesperatelywantandneed. Myownviewisthatmostwanttodotheirbestfortheirstudentsbutoftenfeelattackedwhentoldtheyneedtoimprove.TogrowdevelopandkeepeffectiveteachersGeorgiaschoolsmustfirstcreateacultureinwhichteacherstrustthatleaderswantthemtosucceed. 1Whydotoomanyteachersleavetheirprofession? A.Theleadersdon'tcareaboutthem. B.Therearetoomanytrainedteachers. C.Mostaren'tsatisfiedwiththeirjobs. D.Manyteachershavealreadyretired. 2WhatdoesPrincipalBetsyBockmantrytotellus? A.Theschool'swholeeffortistomaketeachingeasier B.Schoolsshouldlistentotheteachers'suggestions. C.Whattheteacherswantshouldbeconcernedbyothers. D.Schoolleadersmustshowrespectfortheteachers'thoughts. 3Whatisthepurposeofthelastpartofthetext? A.Toshowtheauthor'sconcernfortheteachers. B.TocriticizethestateofGeorgia'seducation. C.Toasktheteacherstodotheirbestforthestudents. D.Tocallontheschooltocreateaculturefortheteachers. 4Whatdoesthepassagemainlytalkabout? A.Whytheschoolsareshortofgoodteachers. B.Howtokeepenoughandeffectiveteachers. C.Whatweshoulddototeachthestudentswell. D.Howtodealwithteacher﹣studentrelationship.
已知随机变量X+Y＝8若X～B100.6则EYDY分别是
如图要测底部不能到达的电视塔AB的高度在C点测得塔顶A的仰角是45°在D点测得塔顶A的仰角是30°并测得水平面上的∠BCD＝120°CD＝40m求电视塔AB的高度．
Travelingwithkidsregardlessoftheageisaterriblethingfornewparents.Responsibilityishighandtravelexpensesmightbeunexpectedatanypointofthetrip.Ifyouareplanningyourfirstroadtriporvacationwithchildrenthereareseveralimportantthingstoconsider.Getachildlocator.1andmanyparentssometimeslosetheirkidsPopulartouristdestinationsareovercrowdedtoo.Soifyouareafraidoflosingyourchildrengetachildlocatortobeawareofwhereyourkidsaregoingwhentheyaccidentallygetlost.2Youdonotneedtopacktonsoftoyssweetsandatabletfullofgamesinordertokeepyourlittleonesentrained.Youcanencouragethemtocreateatraveljournalorsmashbookreadtelleachotherstoriesorgivethemacameratocapturethemostpreciousmomentsduringyourtrip.34Thisisamustevenduringtheshortestroadtrip.Youcanhandleaheadachebutyourchildcan't.Ifyoudonotknowwhattoputinyourfirstaidkit急救箱.consultyourchildren'sdoctorbecauseallchildrenaredifferentandthemedicineseither.Apartfromtheabovemoneypassportavoidingheavyluggagepickafamily﹣friendlydestinationandfamilyfriendlyaccommodationarealsoneeded.Travelingwithkidsisexcitingandinteresting.Yourfirsttripmightnotbesoexcitingbutwithacarefulpreparationyourfamilytripwillbethemostmemorableone.5A.KeepthemcarefulB.KeepthementertainedC.Packasmallkid﹣friendlyfirstaidkit.D.BoardgamesmightbeagodchoicetooE.Airportsandtrainstationsareusuallyovercrowded.F.Avoidingyourlittleonesinthepanningofthetripisagoodidea.G.Involveyourlittleonesintheplanningofthetripwhichwillhelpyou
PM2.5是指悬浮在空气中的空气动力学当量直径小于或等于2.5微米的颗粒物也称为可入肺颗粒物根据现行国家标准GB3095﹣2012PM2.5日均值在35微克/立方米以下空气质量为一级在35微克/立方米～75毫克/立方米之间空气质量为二级在75微克/立方米以上空气质量为超标．从某自然保护区2012年全年每天的PM2.5监测值数据中随机地抽取10天的数据作为样本监测值频数如表所示 1从这10天的PM2.5日均值监测数据中随机抽取3天求恰有1天空气质量达到一级的概率 2从这10天的数据中任取3天数据记ξ表示抽到PM2.5监测数据超标的天数求ξ的分布列 3以这10天的PM2.5日均值来估计一年的空气质量状况则一年按366天算中平均有多少天的空气质量达到一级或二级．精确到整数
OnMarch252010KateandDavidOggheardthewordseveryparentdreadsTheirnewbornwasn'tgoingtomakeit.Theirtwins﹣﹣agirlandaboy﹣﹣wereborn14weeksprematureweighingjustovertwopoundseach.Doctorshadtriedtosavetheboyfor20minutesbutsawnoimprovement.Hisheartbeatwasnearlygoneandhe'dstoppedbreathing.Thebabyhadjustmomentstolive. IsawhimgaspbutthedoctorsaiditwasnouseKatesaid.Iknowitsoundsstupidbutifhewasstillgaspingthatwasasignoflife.Iwasn'tgoingtogiveupeasily. Stillthecoupleknewthiswaslikelygoodbye.InanefforttocherishherlastminuteswiththetinyboyKateaskedtoholdhim. IwantedtomeethimandforhimtoknowusKatesaid.We'dresignedourselvestothefactthatweweregoingtolosehimandwewerejusttryingtomakethemostofthoselastpreciousmoments. KateunwrappedtheboywhomthecouplehadalreadynamedJamiefromhishospitalblanketandorderedDavidtotakehisshirtoffandjointheminbed.Thefirst﹣timeparentswantedtheirsontobeaswarmaspossibleandhopedtheskin﹣to﹣skincontactwouldimprovehiscondition.Theyalsotalkedtohim. WeweretryingtohavehimKatesaid.Weexplainedhisnameandthathehadatwinandhowhardwehadtriedtohavehim. Thensomethingmiraculoushappened.Jamiegaspedagain﹣﹣andthenhestartedbreathing.Finallyhereachedforhisfather'sfinger.Thecouple'slostboyhadmadeit. EightyearslaterJamieandhissisterEmilyarehappyandhealthy. 1FromwhatcanwetellthatJamiewasstillalive? A.Hisheartbeat. B.Hispulse. C.Hisgasp. D.Hisunderweight. 2Whydidtheparentsliewiththebabyboyinonebed? A.Thefamilywantedtostaytogetherandkeepwarm. B.Thefamilywantedtohavetheirprivatespace. C.Theparentsweresotiredandwantedtorest. D.TheparentswantedtospendthelastminuteswithJamie. 3Whatcanbethebesttitleforthepassage? A.PrematureTwins B.Life﹣givingTouch C.First﹣timeParents D.LastPreciousMoments
从5名男生和4名女生中选出3名学生参加一项活动要求至少一名女生参加不同的选法种数是
DuringmymiddleschoolyearsIwasveryallergictoEnglishgrammar.1thetwoincidentsI2laterchangedmyviewaboutlearningEnglish.3IthinkitisreallyfuntolearnEnglishgrammar.ItoccurredwhileIwas4inthemysteriousworldofiPhone.MyEnglishteacherwrotetwosentencesonthe51Thekingwouldwearnoclotheswhichmakehimappeardifferentlyfromothers.2Thekingwouldwearnoclotheswhichmakehimappeardifferentlyfromothers.Glancingatthetwo6Ithoughttheteachermusthavemadeamistake7thesetwosentenceswerethesame.Suddenlytheclassburstintoaloudlaughter.OnlythendidI8thataddingacommacouldshowabigdifferencein9.Afterwardsomething10happenedtome11.AtthebeginningofmyEnglishclassonedaytheteacher12ourhomeworkassignment.Tomy13myteacherhad14out﹣lyinthesentence‘IstudiedEnglishhardly'.'Isn't‘hardly'anadverb?'Iaskedmyself.LaterofcourseI15whatwaswrong.Iwasassumingeveryadjectiveaddedwith﹣lystill16themeaningofthatadjective.NottillthendidIfindoutthat‘hardly'17meant‘almostnot'sowhatIhad18madeaworldofdifferencefromwhatIwantedtosay.InconclusionwhatIexperiencedenablesmeto19Englishistrulyamysteriousworldofart.What20itistolearnEnglishgrammar!1A.However B.Besides C.Therefore D.Instead2A.witnessed B.heard C.experienced D.described3A.Then B.Soon C.Now D.Later4A.shocked B.absorbed C.rooted D.trapped5A.phone B.door C.window D.blackboard6A.sentences B.words C.phrases D.questions7A.whether B.because C.when D.if8A.ask B.wish C.realize D.hope9A.life B.form C.time D.meaning10A.interesting B.exciting C.strange D.awkward11A.before B.together C.yet D.again12A.checked B.returned C.found D.finished13A.disappointment B.joy C.surprise D.relief14A.handed B.worked C.carried D.crossed15A.figuredout B.gaveaway C.searchedfor D.talkedabout16A.creates B.hides C.explains D.keeps17A.finally B.gradually C.actually D.frequently18A.written B.known C.said D.seen19A.expect B.understand C.respond D.introduce20A.trouble B.fun C.difference D.magic
已知5x﹣n． Ⅰ当n＝6时求 ①展开式中的中间一项 ②展开式中常数项的值． Ⅱ若展开式中各项系数之和比各二项式系数之和大于240求展开式中含x项的系数．
ItwasaFridaynightandIwas1arestaurantwashingdishes.Aplate2throughmywetfingersandfellontothefloorin3.Myfaceflushed发红andinsideIwasscreaming'Whyme!?'asifmy4wouldmaketheplatewholeagain.Thebrokenplatewasonlyoneofthemany5fightinginsideme.Therewereadozen6smallerbuturgentconcerns.Formeitwasimpossibletogetsomemuch7restorsomestudytimebeforeacomingexam.Ihadto8withthefamilyexpenses开销.SoIgotbacktowork.Itwas12a.m.whenIfinallyfinishedmywork.Igotonthe9homeandtookoutmynotestostudy.Igotthe10looksfrompeopleoutofbarsbecauseIwasstudyingonabusinthemiddleofthenight.Their11didn'tbothermeatall.Iknewsomethinghadtochangeinmyfamilyandit12tometobeginit.FortunatelyIalsoknewIhaddesireand13inmyblood.MygrandfatherwasamongthefirstMexicanimmigrantswho14inL.A..BothofmyparentsleftMexicointheirearlyteenageyearsandbeganworkinglong15asacookandamaid.Thespiritwas16generationswhichhelpedmebothinschoolandatwork.AsIwalkedthroughthefrontdoorathomeIsawmymotherhadfallenasleep17medespiteherownlongday.Inmybedroomwatchingmybrothersbreatheslowlymademefeelmybody'stiredness.HoweveritwouldbeawhilebeforeIcould18theminsleep.Ihadanessay19earlythenextmorningandMs.DePaolodoesn't20latework.1A.inthemiddleof B.inthefrontof C.inthecornerof D.inthebackof2A.slipped B.flew C.jumped D.slowed3A.slices B.pieces C.blocks D.sheets4A.scream B.cry C.voice D.shout5A.tasks B.difficulties C.worries D.matters6A.another B.others C.other D.some7A.excited B.attracted C.delayed D.needed8A.increase B.workout C.cutdown D.helpout9A.taxi B.bus C.subway D.train10A.strange B.casual C.friendly D.formal11A.observation B.stares C.laughter D.ignorance12A.felt B.jumped C.threw D.fell13A.promise B.wish C.courage D.ability14A.settled B.moved C.lived D.worked15A.years B.days C.hours D.minutes16A.handedin B.passeddown C.passedaway D.turnedto17A.waitingfor B.watchingon C.callingup D.searchingfor18A.take B.join C.hold D.keep19A.ready B.written C.due D.finished20A.receive B.check C.accept D.assess
在△ABC中已知内角ABC所对的边分别为abc已知a＝1B＝45°△ABC的面积S＝2． 1求边c的长 2求△ABC的外接圆的半径R．
Inmostartmuseumsthepaintingsonthewalljustlookflatbutsometimesvisitorscomeacrossanimagethatappearstobethree﹣dimensional.Theartisthascleverlyusedcolorslinesandshadingtogivethepaintingsomedepthmakingitmorerealistic.Theartistictechniqueofcreatingthree﹣dimensionalimagesofsomethingonaflatsurfaceiscalledtrompeI'oeil.TodaysomeartistsareadaptingtheideaoftrompeI'oeiltomakethingsbecomeinvisiblewhichiscalledcamouflageart. Innatureusingcamouflagenotonlyallowsinsectsandanimalstohidefromtheirnaturalenemiesbutalsoallowsthemtogetcloseenoughtosurpriseotherinsectsorsmalleranimalsthattheywanttocatchandeat.Artistsarenothidingorpreparingtoattack.Insteadtheyareusingtheideaofcamouflagetomakeurbanspaceslooknicerortomakestatementswiththeirart. Itisnotdifficulttofindthingsthatwewouldliketomakedisappearsuchasthedullwallofalargeindustrialbuildingorthepolescarryingelectricitywires.Artistscanmakethesethingsmoreinterestingandinsomecaseslessvisible.Inmanyurbanareaslargebuildingshavebeenpaintedwithamazingpicturesthattrickoureyes.Thusordinarybrickwallsaretransformedintointerestingworksofart. Someartistsincludecamouflageintheirworktosaysomethingaboutthemodernworldwelivein.ForexampleAmericanartistTrinaMerrycamouflagespeoplesothattheydisappearinthelandscapesshe photographs.HerlatestseriesNewYorkCityblends融合womenandtheirenvironmenttocreateimagesthatcloselyexaminetherelationshipbetweenpeopleandwheretheylive.MyseriesshowsrespectforBigApplewomenwhofeeltheneedtoblendinwitheveryoneelseinNewYorkMerrysays.Ithinkmanywomenmoveherehopingtoliveacitylifewhentherealityisthatmostwomenhavetochangetheirfancydesignerheelsonthesubwayformorepracticalsneakers. 1Whichofthefollowingwordsbestdescribecamouflageart? A.Flat. B.Invisible. C.Dull. D.Disappointing. 2Whatisthepurposeofusingcamouflageinnature? A.Tomakeanimalslooknicer. B.Toexpresspeople'sartisticconcept. C.Tosurprisesmalleranimalsorinsects. D.Toprotectanimalsfromnaturalenemies. 3Fromthelastparagraphweknowthat. A.Merryfeeltheneedtofitinwithothersinthecity B.mostwomenwearfancydressesintheirdailylifeinthecity C.womeninNewYorkhavesucceededinbeingapartofthecity D.NewYorkcitycanpartlymirrorpeople'slifeinmodernsociety 4Thisarticleismainlyabout. A.aformofart B.theseriesofpaintings C.afamousartist D.thewomeninNewYork
Iwillneverforgetthedarknessthepainandstrongdesiretodie. NovemberarrivedgreyandbusyandgoingintoanevenmorestressfulDecemberIwasfilledwithanxiousthoughts.Avisittomyfather'sgraveisoftenagoodchancetocryandwhenIleaveIfeelalittle moreatpeace.Butthistimewasdifferent.IdrovehomeandeverynightfortherestofthatweekIcried. OnSaturdayIwatchedaTVprogramteachingbakingandthenIstartedtolearn.BytheendoftheweekendIhadatablecoveredwithsweettreats.Ipackagedthemupintinsattachedalabeltoeachofthemwithwinterloveonitanddroppedthemoffonafewofmyneighbors'porches.Itshockedmehowmuchitlightenedmymoodseeingasmallpackagelostonaporch.ThethanksIreceivedlaterfromtheneighborsmademelightup.Itfeltsogoodanditdistractedmefrommydarkthoughts. ByJanuaryIhaddevelopedaroutineonSundayI'dbakecookiesandpackagethemupandonMondayI'ddeliverthem.EveryweekIaddedafewdifferentpeopletomydeliveryroute.Thenthingsstartedshowinguponmydoorstep﹣ahomemadecupapairofsockswithcookiesandevenagiftcertificatefromthelocalbookstore.Everysingleonemeltedmyheart.ButwhatIreallyappreciatedwashowpeoplebegantosharetheirownstoriesofmentalhealthwithme.Thereisnogreaterhonorthantobetrustedwithanother'slife.Iwasoverwhelmedbytheloveandcareofmycommunity.Ithumbledmethatsomethingsosimplehadcreatedsuchincrediblekindness. Iwasshiftingintoanewseasonoflightwhilelettinggoofaseasonofdarkness.Itremindedmethatthereisbeautyinbeingkindandthatlifeistoughbutthereisaquietstrengthinknowingyouarenotalone. 1Whatcanweknowabouttheauthorfromthefirsttwoparagraphs? A.Shefeltlifewastoopainfultolive. B.Shewasinabadphysicalcondition. C.Shewasstressedduetoherfather'sdeath. D.Sherecoveredaftervisitingherfather'sgrave. 2Aftershestartedsharingcookieswithneighborstheauthor. A.gainedtrustandcarefromthem B.addedotherthingstoherdeliverylist C.feltherlifewasnolongerbusyorstressful D.foundsomeofthemhadmorementalproblemsthanher 3Whatisthemainpurposeofthispassage? A.Toexpressgratitudetocaringneighbors. B.Tosharehowbeingkindhelpedherregainhope. C.Tospeakofthebenefitsofbakingcookiesathome. D.Toshowtheimportanceofatrustedcommunity.
某英文报社正在开展环保大讨论向你约稿.请以垃圾分类为主题按照以下要点发表你的观点 1.意义 2.现状 3.建议 注意1.词数100左右 2.文章标题已拟好不计入总次数. 3.参考词汇垃圾分类garbageclassification OnGarbageClassification Yours LiHua
Tenzinglefthishomewhenhewastentoworkandhelphismotherwhowaslookingaftertheir2﹣acreancestralfarmafterhisfather'sdeath.HedidtemporaryjobsforthefirstfewyearsandthenjoinedaMalaysianconstructionfirmwherehelearnttodriverepairmachinesworkontheInternetandevenspeakEnglishfluently. Inthose13yearsIlearnteverything﹣drivingmechanicworkandhowtosetupasmallfactory.ThismademegainmuchconfidencetodoalmostalljobssaysTenzing. HoweverashismotherwasgettingolderonDecember122006TenzingreturnedtohishometowninAssam.Havingvisitedseveralfarmshecametoknowthatteacouldbeeasilyexportedandmanyteacompanieswerebuyingteasohealsodecidedtogrowteaonhisfarm.Butashisfamilyhadnevergrownteahehadnoideahowtodoit. Beingalayman外行inthisfieldTenzingwenttomeetwithmanyteaexpertsandfollowedtheirinstructions.Butwheneverliesprayedpesticide农药onhisfarmhe'dgetaheadacheandfeelindisposed.SohestartedlookingforalternativesTenzingdidhisresearchonlineandfinallyin2007heconnectedwithpeoplefromaCanadiannon﹣governmentalorganizationandinvitedthemtohisfarmwheretheytrainedhim.ThusTenzingstartedgrowingteaorganically. TodayTenzinghas25acresoflandinwhich7.5acresisusedforteaplantingandhegrowsalmostalltypesoffruitsandvegetables.Hissuccessinspiredmanyandfarmersfromotherpartsofthecountryalsostartedcomingtohisfarmtolearnorganicfarming.Hehastrainedabout30000farmerssofar.Everyyearalmost100touristsvisithisfarmfromvariouspartsoftheworldliketheUKAustraliaGermanyetc. 1WhatcanweknowaboutTenzing? A.Hewasmistreatedatayoungage. B.Helivedahappychildhood. C.Hereceivedmuchformaleducation. D.Hehadgreatlearningability. 2WhydidTenzingwanttogrowteaonhisfarm? A.Teasoldverywellatthattime. B.Hismotherwasgettingolder. C.Hislandwasbestforteagrowth. D.Hewastiredoftemporaryjobs. 3WhatdoestheunderlinedwordindisposedinParagraph4probablymean? A.Unfair. B.Motivated C.Uncomfortable. D.Touched. 4WhatcanbeinferredaboutTenzing'sfarmaccordingtothelastparagraph? A.Ithasbeenthebiggestonearound. B.Itisfamousnationallyandglobally. C.Itismadeuseofmostlytogrowtea. D.Ithasbecomeahottouristattraction.
某省实行高考改革考生除参加语文数学英语统一考试外还需从物理化学生物政治历史地理6科中选考3科．学生甲想报考某高校的医学专业．就必须要从物理生物攻治3科中至少选1科则学生甲的选考方法种数为用数字作答
若数列{an}满足an+1＝且a1＝则a10＝
假如你是李华你约好昨天去公交车站接你的朋友Dylan但你却迟到了10分钟令他很失望.请用英语给他写一封道歉信要点如下 1.向他表示道歉2.表达你对此事的认识3.请求他的原谅. 注意1.词数80左右 2.可以适当增加细节以使行文连贯 3.开头和结尾已为你写好不计入总词数. DearDylan Yours LiHua
In2013Tallinn爱沙尼亚首都塔林becametheworld'sfirstcapitalcitytoofferpeoplefreepublictransport.LastyearEstonia爱沙尼亚settheaimtobecomethefirstcountrywithfreepublictransportnationwide.Busesarenowfreeofchargein11ofits15counties. Tallinn'scitygovernmentcameupwiththeideaoffreetransportin2008.Eventhoughthecitypaidmorethan70%ofpublic﹣transportcoststicketpriceswerestilltoohighforpoorerpeople.Crowdednesshadalsobecomeaproblem.Since1991thenumberofpeopleowningcarshasdoubled. Opponents反对者thoughttheideaunaffordableandcritics批评者predictedthetransportsystemwouldbecomeovercrowdedandlackmoney. Surprisinglypublictransporthasimproveddespitea€12millionhittothesystem'sfinancesfromlostticketsales.Tallinn'spopulationhasgrownleadingtoanincreaseinlocaltaxintake.Additionalrevenue财政收入comesfromtouristswhostillhavetobuytickets.TheuseofpublictransportinTallinnhasgoneupby10%whilethenumberofcarsinthecityhasgonedownby10%meaninglesscongestion. NowothercountriesarelookingatEstonia'sexperience.TallinnofficialssaytheyhavehadinterestfromFranceSwedenPolandItalyandGermany.Otherplaceshavealreadyintroducedfreepublictransportforcertaingroupsoratcertaintimes.InEngland1/3ofallbustripsarefare﹣freeespeciallyforpensioners领养老金者Walesrunsfreetravelatweekendstoimprovetourism.Butsofarfullfare﹣freetravelisrare.ThecityofHasseltinBelgiumranfreepublictransportfor16yearsbeforereintroducingfaresbecauseofincreasingcosts. 1Whichofthefollowingplacesoffersfullfare﹣freepublictransport? A.Hasselt B.Estonia C.Wales D.Tallinn 2WhatideadidtheopponentsandcriticsshareaboutTallinn'sfreepublictransport? A.Thegovernmentwouldn'thaveenoughmoneytocarryitout. B.Itwouldn'thelpwiththecity'sovercrowdedness. C.Itwouldleadtotheheavylossfromticketsales. D.Yearslaterthecitywouldreintroducefaresfrompeople. 3Whatdoestheunderlinedwordinparagraph4mean? A.pollution B.population C.crowdedness D.income 4WhydoyouthinksomanycountriesshowinterestinEstonia'sexperience? A.Itoffersmorejobopportunitiesforpeople. B.Ithelpstosolvethetrafficproblemincities. C.Itencouragespeopletostopdriving. D.Itattractsmoretouriststotakebuses.
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