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如图，在直三棱柱ABC-A1B1C1中，D为AC的中点． （1）求证：AB1∥面BC1D （2）若AB=BC=BB1，∠ABC=，求CC1与面BC1D所成角的正弦值．
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高二下学期数学《》真题及答案
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如图在直三棱柱ABC﹣A.1B.1C.1中AB=AC=5BB1=BC=6D.E.分别是AA1和B.1
已知直三棱柱ABC-A.1B.1C.1中AB=3AC=4AB⊥ACAA1=2则该三棱柱内切球的表面积
侧棱垂直底面的三棱柱叫直三棱柱.已知直三棱柱ABC－A.1B.1C.1底面△ABC中CA＝CB＝1∠
如图所示在直三棱柱ABCA1B.1C.1中AB＝BC＝BB1＝2∠ABC＝90°E.F.分别为AA1
如图在直三棱柱ABCA.1B.1C.1中若BC⊥AC∠BAC＝AC＝4M.为AA1的中点点P.为B
如图在直三棱柱ABC﹣A1B.1C.1中AC⊥BC点D是AB的中点.求证1AC⊥BC12AC1∥平面
如图直三棱柱ABC-A1B1C1中D.E分别是ABBB1的中点.1证明BC1//平面A.1CD;2设
如图在直三棱柱ABC﹣A1B1C1中AC⊥BC点D.是AB的中点.求证1AC⊥BC12AC1∥平面B
如图在直三棱柱ABC―A.1B.1C.1中∠ACB=90°点D.是AB的中点.1求证AC⊥BC12
如图在直三棱柱ABC﹣A.1B.1C.1中AC=3BC=4AB=5AA1=4点D.为AB的中点.Ⅰ求
如图在直三棱柱ABC－A.1B.1C.1中AC＝3BC＝4AA1＝4点D.是AB的中点I.求证AC⊥
如图所示的空间直角坐标系直三棱柱ABCA1B.1C.1中|C.1C.|＝|CB|＝|CA|＝2AC⊥
在三棱柱ABC-A1B1C1中A.1在底面上的射影在线段AC上底面△ABC是以∠B为直角的等腰三角形
如图在斜三棱柱ABCA1B.1C.1中∠BAC＝90°BC1⊥AC则C.1在底面ABC上的射影H.必
直线AB上
直线BC上
直线AC上
△ABC内部
如图在三棱柱ABCA1B.1C.1中D.E.F.分别是ABACAA1的中点设三棱锥FADE的体积为V
如图在三棱柱ABCA1B.1C.1中E.F.G.H.分别是ABACA.1B.1A.1C.1的中点求证
如图直三棱柱ABCA1B.1C.1中D.E.分别是ABBB1的中点.1证明BC1∥平面A.1CD2设
如图在直三棱柱ABCA1B1C1中D.为棱BC上一点.1若AB＝ACD.为棱BC的中点求证平面ADC
如图直三棱柱ABC—A1B1C1中AB⊥ACDE分别为AA1B1C的中点DE⊥平面BCC1．1证明A
如图直三棱柱ABC—A1B1C1中AB⊥ACDE分别为AA1B1C的中点DE⊥平面BCC1．1证明A
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Itisessentialtolearnhowtocommunicatewithpeoplefromotherculturesinordertobuildgoodrelationswiththem. 1 Alittleknowledgecangoalongway.Ifyouhavetimebeforemeetingwithsomeonefromanotherculturetrytotaketimetolearnthebasicdosanddon'tsofthatculture.Youcanfindinformationonthisfrominternetsources. Berespectfulandtolerant Eachculturehasitsownsetofdominantvalues主导价值观beliefsandprejudices.Youshouldn'tjudgepeoplebasedonthesedifferences.2Youmayevenlearnsomethingnew. Speakclearlyandslowlyifnecessary. Donotshoutortreatothersasthoughtheydonotunderstand.Raisingyourvoicedoesnotmakeyoueasiertounderstand.3Communicationdifficultiesarisefromdifferencesnotbecauseofmattersofintelligence. Avoidslangunlessyouareabsolutelysure. 4What'sworseitmayberegardedasveryoffensive.Itisbesttoavoidthemaltogetherunlessyouareabsolutelysureyouknowhowtousethemproperly. Understandrulesregardingtouching. Someculturesmayexpectmorephysicalcontactbetweenpeoplewhencommunicatingthanotherculturesdo.5Don'ttakeitasoffensiveifanothercultureismoreorlessphysicalthanyouareusedto.Ifyouareuncomfortableletothersknow. A.Usingnon﹣standardlanguageimproperlycanmakeyouhardtounderstand. B.Insteadrespectthemforwhattheyareandtoleratethem. C.Itiscommonfordifferentculturestousefacialexpressionsdifferently. D.Learnabouttheculturebeforehand. E.Forexamplesomeculturesmayshakeortouchhandsmorewillinglythanothers. F.Thisisbecausecertainposturescanbeseenasoffensivetoothers. G.Donottreatotherpeopleasthoughtheyareunintelligent.
Areyoufacingasituationthatlooksimpossibletofix? In1969thepollutionwasterriblealongtheCuyahogaRivernearClevelandOhio.It1beunimaginablethatitcouldeverbecleanedup.Theriverwassopollutedthatit2actualcaughtfireandburned.Nowyearslaterthisriverisoneof3mostoutstandingexamplesofenvironmentalcleanup. Buttheriverwasn'tchangedinafewdays4evenafewmonths.Ittookyearsofwork5reducetheindustrialpollutionandcleanthewater.Finallythathardworkpaidoffandnowthewaterintheriveris6cleanthanever. Maybeyouarefacinganimpossiblesituation.Maybeyouhaveahabit7isdrivingyourfamilycrazy.Possiblyyoudrinktoomuchordon'tknowhowtocontrolyourcreditcarduse.Whenyoufacesuchanimpossiblesituationdon'tyouwantaquickfixandsomethingtochangeimmediately? Whilethereare8amazestoriesofinstanttransformationformostofusthe9changearegradualandrequirealotofeffortandworklikecleaningupapollutedriver.Justbe10patience.
关于x的方程x2+2m﹣1x﹣4m＝0的两个实数根分别是x1x2且x1﹣x2＝2则m的值是．
Fournationalparksworththetrip CarlsbadCavernsNational ParkNewMexico InCarlsbadCavernstherearemorethan119cavesincludingthemaincavewiththemile﹣longBigRoomwalkinside.TheparkissetalongNewMexico'squietsouthernborder.MaketimetoalsoexplorethesurroundingChihuahuanDeserthometothemostdiversecollectionofcactus仙人掌species物种intheworld'sdeserts.InsummervisitorscanwatchhalfamillionBrazilianfree﹣tailedbatsfilltheeveningskies. Tel575﹣785﹣2232 Price﹩10perpersonkids15andunderfree ChannelIslandsNationalPark California JustoffthecoastofVenturathefivePacificChannelIslandsoffer160milesofpristine原始的coastline.Youcanreachtheislandsbyboatorplane.OncethereyoucanseegraywhalesRisso'sdolphinsandelephantsealswhileonawhale﹣watchingtourorsearchfortherarenativespeciessuchasislandfoxes. Tel805﹣658﹣5730 Pricefree IsleRoyaleNationalPark Michigan IsleRoyaleisa570000﹣acreislandinthenorthwestofMichigan'sLakeSuperior.Eachsummervisitorsgotherebyferryorseaplanetoexploretheisland's19th﹣centuryshipwrecks沉船learnabouttroutandwhitefishorpaddletheplentifulwaterwaysbyboat. Tel906﹣482﹣0984 Price﹩4perpersonkids10andunderfree DryTortugasNationalPark Florida DryTortugas﹣﹣﹣aremoteislandabout70mileswestofKeyWestandduenorthofHavana﹣﹣﹣﹣isanidealplaceforswimmers.Infactthemajorityofthepark's100squaremilesareactuallyunderwater.VisitorscantakeaboatferryorseaplanetoDryTortugaswherethey'lldiscovershipwrecksseaturtlesandnearly300typesofbirds. Tel305﹣242﹣7700 Price﹩10perpersonforsevendayskids16andunderfree 1HowmuchshouldacouplewithtwolittlebabiespayforCarlsbadCavernsNationalPark? A.﹩40. B.﹩30. C.﹩20. D.﹩10. 2Whichplaceisthebestchoiceforsomeonefondofboating? A.Florida. B.Michigan. C.California. D.NewMexico. 3Whichparkshouldaswimminglovervisit? A.IsleRoyaleNationalPark. B.DryTortugasNationalPark. C.ChannelIslandsNationalPark. D.CarlsbadCavernsNationalPark.
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1计算﹣12019+﹣﹣2﹣|2﹣|+4sin60° 2先化简再求值1﹣÷其中a＝+2
WhentheQueenofEnglandandtheRoyalFamilygearupfortheirlatestpublicgalaorpartyatBuckinghumPalaceinvitedguestsmightnoticethatsomethinghaschanged.Whentheyenjoyrefreshments茶点intheroyalresidencetheywillfindtheuseofplasticmaterialsgreatlyreduced.Gonearetheplasticstrawstraysandplates.TheQueenishopingwithheractionstocallattentiontotheimportantissueofplasticwasteintheworldtoday.Indeedit'sabouttimethatworldgotitsacttogethertofacethisissue. Eachyeartheworldproducesaround300milliontonsofplasticwaste.Ofthatamountonlyabout10percentisrecycled.Mostofplasticwastefindsitswayintolandfills垃圾填埋场butasignificantamountofit﹣around30milliontons﹣endsupintheworld'soceanseveryyear.Thesenumbersarescary.Andtheyshouldbebecausethereispotentialforplasticwastetodestroythewholeworld. AtMidwayAtollinthePacificOceanfloatsamassofplastic.Thealbatrossbird信天翁thatcallstheislandhomeregularlyconsumestheplasticthinkingitisfood.Thisiskillingofftheseendangeredbirds.Thebodiesofdeadbirdsrotrevealingpiecesofplasticintheirstomachs. Scientistspredictthattherewillbemoreplasticthanfishbyweightintheoceanby2050.Thefishlikethealbatrossconsumetheplasticpieceswhichendupinthefoodthatweeat.Between14to16percentoftheworld'sanimalproteincomesfromthesea.Overonebillionpeoplerelyonseafoodastheirprimaryfoodsource.Plasticwastecouldliterallydestroythelivesofbillionsofpeopleworldwide. Thetimetodealwiththisworldwideepidemic流行病haslongbeenoverdue.TheQueenisleadingbyexample.Everyoneofusneedstofollowherlead.Ifwedon'tplasticwon'tjustbewhatweusetoeat﹣﹣itwillbeonthemenuaswell. 1Accordingtothearticleofplasticwastefindsitswayintotheworld'soceaneveryyear. A.one﹣tenth B.one﹣ninth C.one﹣eighth D.one﹣fifth 2Accordingtothearticlewhichofthefollowingstatementsistrue? A.Fishermensuffermostfromplasticpollution. B.Puttingplasticwasteinlandfillsisenvironmentallyfriendly. C.Thealbatrossbirdisendangeredpartlyduetoplasticpollution. D.Alargernumberofplasticparticlesthanfishwillbefoundintheoceanby2050. 3Whatdoestheunderlinedwordoverdueinthelastparagraphmean? A.ignored B.appreciated C.concerned D.delayed 4Whatistheauthor'spurposeofwritingthearticle? A.Tosolvetheproblemofplasticpollution. B.TopraisetheQueenofEnglandandtheRoyalFamily. C.Toarousepeople'sinterestinoceanprotection. D.Toraisepeople'sawarenessofplasticpollution.
定义符号min{ab}的含义为当a≥b时min{ab}＝b．当a＜b时min{ab}＝a．若当﹣2≤x≤3min{x2﹣2x﹣15mx+1}＝x2﹣2x﹣15则实数m的取值范围是．
Notlongbeforemydaughter'sshoeswerescratched划破withaknife.Sheburstintotears.Itookthemtotheshoemaker's. Theyoungapprentice学徒glancedatthe1andsaidNothingIcandoexcept2theupper.HismasterlookedatthemandsaidIfyou3meIwilladdmorescratchesonboththeshoes. Iwas4andaskedwhy. HeexplainedAsiftheopeningweremade5foraspecialstyle. Ididn'tfullyunderstandhim6Idecidedtoleavetheshoes. TwodayslaterIdroppedbyfromworkto7theshoes.Ifoundmorescratchesoneachshoealltheopeningswerepatched缝补bysoftredleatherthestitches针脚weretwistedwiththeappearancelookingmore8andinterestingthanever.Icouldn'thelppraisingthemaster's9. Anothertimemysister'sblousewastornleavingalargeopening.Mywifecheckedit10andthensaidLetmetakeithomeand11it. ThreedayslaterseeingitagainIwasgreatly12allthetornpartstookonalookoficecrystal水晶attachedtoitwasasnowmanmadeoffloweryrags.Isighedwith13It'samazing! Iwas14bythatshoemaker.Patchesareconsideredtobe15butaskillfulcraftsman工匠canmakeittakeonakindof16.repliedmywife. Herwordsinspired启发memoreperfectionisimpossibletoachievein17patchesappearinthe18ofinjurydisabilityordisease.Sinceyoucan'tchangetheexistenceofwoundyoushouldnot19people'ssympathy同情bydisclosingthewoundwhichismeaningless.Justsew缝the20bypatchesandproduceamostbeautifulfloweronitandthatisthesignificanceoflife. 1A.scar B.opening C.hole D.mark 2A.replace B.remove C.throw D.tear 3A.tell B.show C.agree D.trust 4A.delighted B.confused C.excited D.astonished 5A.onpurpose B.bychance C.inparticular D.inturn 6A.so B.and C.as D.but 7A.bring B.collect C.see D.return 8A.successful B.skillful C.attractive D.positive 9A.skill B.drill C.performance D.strength 10A.anxiously B.suddenly C.carefully D.delightedly 11A.wash B.iron C.save D.mend 12A.puzzled B.disappointed C.surprised D.touched 13A.anger B.regret C.praise D.care 14A.encouraged B.inspired C.moved D.attracted 15A.common B.beautiful C.ugly D.rare 16A.difference B.perfection C.newness D.change 17A.future B.mind C.life D.place 18A.form B.name C.shape D.need 19A.treat B.accept C.ignore D.expect 20A.wound B.pain C.injury D.disability
温度由﹣4℃上升7℃是
分解因式x3﹣9x＝．
如图点A点B分别在y轴x轴上OA＝OB点E为AB的中点连接OE并延长交反比例函数y＝x＞0的图象于点C过点C作CD⊥x轴于点D点D关于直线AB的对称点恰好在反比例函数图象上则OE﹣EC＝．
假定英语课上老师要求同桌之间交换修改作文请你修改你同桌写的以下作文.文中共有10处语言错误每句中最多有两处.每处错误仅涉及一个单词的增加删除或修改. 增加在缺词处加一个漏字符号∧并在其下面写出该加的词. 删除把多余的词用斜线\划掉. 修改在错的词下划一横线并在该词下面写出修改后的词. 注意 1.每处错误及其修改均仅限一词 2.只允许修改10处多者从第11处起不计分. LastweekIgotthefirstprizeintheEnglishSpeechContestholdinourschoolthatmademeveryexcited.IusedtobetooshynottospeakEnglishinpublic.ItwasSusanwhoasksmetopracticeseveraltimesinherofficeandcorrectedmypronunciationandintonation.BesidessheencouragedmebeconfidentandbravewhetherIwantedtoshowmytalentbeforeothers.Ifollowedheradvices.ThatwaswhyIwonthefirstprize.Iamdeepmovedbywhathehasdoneforme.Ioweherathousandthankswithherkindness.
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Manypeopleseemtolovepotatoeshowevertheyarecooked.Buthaveyoueveraskedyourselfwheretheycamefrom? ItallstartedinPeru.Therepeoplegrewpotatoesover2000yearsago.Theyweren'tliketheonesweknowtoday.1ThefirstEuropeanstotrytoplantpotatoesweretheSpanish.In1537Spanishexplorersdiscoveredpeopleeatingwhattheycalledpapas.TheybroughtthisstrangevegetablebacktoSpaininthe1550s. Peoplegenerallydidn'tlikethepotato.LotsofothervegetableswereintroducedintoEuropeatthesametimeliketomatoesandsweetpotatoesandpeoplepreferredthosetotheunattractivepotatoes.2VeryslowlytheyspreadthroughEurope.ThereisastorythatKingLouisXVIofFrancelikedthepotatoandplantedtheminhisroyalgarden.3 Sowhataboutchips?WelltheBelgiansclaimthattheyinventedfriedpotatoesalthoughnobodyreallyknowsforsure.ThefirstmentionofchipsinEnglandisbythewriterCharlesDickensin1859.4TheAmericanscallthemFrenchfriesbecausesoldiersfromAmericawenttoFranceduringtheFirstWorldWarandlovedthedish.NowtheAmericanseatovertwentymilliontonsofchipsayear. CrispsareanAmericaninventionalthoughtheycallthemchips.EverybodyagreesthatanativeAmericanchefGeorgeCrummadethefirstcrispsin1853.Onedayadifficultcustomerwantedfriedpotatoesslicedthinly.Whentheyarrivedhesaidtheyweren'tthinenough5IntheendCrumgotannoyedandslicedthepotatoesasthinlyashecouldandfriedthemandthenaddedlotsofsalt.Thedishwasanimmediatesuccess. Nexttimeyouareinyourfavouritefastfoodplaceeatingchipswithyourfriendsamazethemwithyourpotatoknowledge! A.Hekeptsendingthembacktobecookedagain. B.Theoriginalpotatoesweresmallerandtastedbitter. C.Theywerefoundtobeagoodsourceofvitaminssurprisingly. D.Hementionedchipsofpotatofriedinoilinoneofhisbooks. E.Heaskedthefriedpotatoestobemixedwithbutterandcheese. F.Ordinarypeoplestolethemandplantedthemintheirowngardens. G.Theyweregiventoslavesandprisonersbecausetheyweresocheap.
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FlorenceNightingalewasnamedafterherbirthplaceFlorence.Italy.WhenshewasalmostayearoldshereturnedwithherfamilytoEngland. Florenceoftenhelpedhermotherdeliver运送foodtothepoorandsick.1Herfamilywasshockedbecausenursingwasnotarespectedprofession职业. ButFlorencewasdetermined.Shestudiedbooksonmedicine.LatershevisitedhospitalsinFranceGermanyandIrelandandlearnedeverythingshecould.2 In1854BritainwasatwarwithRussiaFlorencewenttotheBritishhospitalinScutariandshewasshocked.Thehospitalleftmenlyingonthefloorandratswererunningeverywhere.3Manysoldiersdiedbeforereceivinghelp. Thedoctorswouldn'tlistentoFlorencebecausetheydidn'tliketheideaofwomeninarmyhospitals﹣untiloneday500unexpectedcasualties伤亡者arrived.4Florencemadechangesmakingsurethemenwerewashedandtheirinjurieswerecaredfor.Everynightshewouldcheckthepatientswithherlamp. Whenshereturnedhomeafterthewarafundhadbeensetupinherhonor.Manyofthesoldiersshehadnursedhadmadecontributions捐款.NowshecouldsetuptheNightingaleTrainingSchoolinLondon. AfteryearsofhardworkFlorenceNightingalesawcleanerandmorecheerfulhospitals.5Allofthiswasbecauseoftheladywiththelamp. A.Nursingbecameanhonoredprofession. B.Therewasnorunningwaterandnoheat. C.Sheknewshehadmuchtolearnaboutnursing. D.Florencesawthesoldiers'healthhadimproved. E.Asshegrewoldershedecidedtobecomeanurse. F.TheysoonrealizedthatFlorencecouldgiveahand. G.Uponreturninghomeshewasanexpertonhospitalmanagement.
物理学的发展离不开广大物理学家不懈的探索和无私的奉献．德国物理学家最先通过实验归纳出一段导体中电流与电压和电阻之间的定量关系为了纪念他做出的杰出贡献人们将他的名字命名为的单位．
已知如图所示在矩形ABCD中点E在BC边上△AEF＝90° 1如图①已知点F在CD边上AD＝AE＝5AB＝4求DF的长 2如图②已知AE＝EFG为AF的中点试探究线段ABBEBG的数量关系 3如图③点E在矩形ABCD的BC边的延长线上AE与BG相交于O点其他条件与2保持不变AD＝5AB＝4CE＝1求△AOG的面积．
如图直线y＝2x+6与反比例函数y＝𝑘＞0的图象交于点A1m与x轴交于点B平行于x轴的直线y＝n0＜n＜6交反比例函数的图象于点M交AB于点N连接BM． 1求m的值和反比例函数的表达式 2观察图象直接写出当x＞0时不等式2x+6＜0的解集 3当n为何值时△BMN的面积最大最大值是多少
如图在△ABC中点DE分别在ABAC上∠AED＝∠BAB＝2AE若△ADE的面积为2则四边形BCED的面积为．
当k＜0时一次函数y＝kx﹣k的图象不经过
Mekongfreshwaterirrawaddydolphin短吻海豚isanendangeredspecies濒危物种throughoutAsiawithreducingnumbersinhabiting栖息stretchesoftheMekonginCambodiaandLaosandBangladesh.Thedolphincanliveupto30yearsgrowupto2.5minlengthandcanweigh150kg. Fortunatelyfortravelersthedolphinshavebecomeapopulartouristattractioninrecentyearsprovidingavitaldevelopmenttothelocaleconomy.Kratieasleepyprovincialcapital7hoursbybusfromPhnomPenhisthebestplacetoseethem.TheirrawaddydolphinsliveindeepMekongpoolallyearroundandcanbefoundatKampivillage15kmnorthofKratietownwhichhasbecomeasymbolofthetown'srejuvenationafteryearsofwarandneglect.ThetriptoseethedolphincanbestartedatanytimeofthedayfromKraietownandtravelupstreamaround30minutesbycaralongaquietpavedroadtoKampiariversidefishingvillage. Thedolphinscanusuallybeseenrightfromtheriverbankbutit'sworthwhile值得的totakeaspottingcruiseinoneofthewoodenlong﹣tailboatsavailableforhire.Theirrawaddydolphinswon'tcomerightuptotheboatliketheirgregarious群居的salt﹣watercousinsbuttheyareeasytofindlyinglazilyaboutonthesurfaceorbreakingwaterwithadistinctivepuffofspraywhilechasingfish. Theboattripindriveseasonisonly60minutes.Theboatmenwillturnoffthemotortoapproachthedolphinsandsailwithwoodenoarsorsimplymakefasttoaclumpoffbrushwhendolphinsarenearby.Injustoveranhourontheboatyouwillseethedolphinsoverahundredtimesatarangecloseenoughtodistinguish辨别betweenindividualanimals. 1Whatisthemainideaofthefirstparagraph? A.Generalinformationofirrawaddydolph. B.Theprotectionofirrawaddydolphins. C.Thedistributionofirrawaddydolphins. D.Thegrowthofirrawaddydolphins. 2TheunderlinedwordrejuvenationinParagraph2probablymeans. A.destruction B.reunion C.recovery D.reform 3Whichofthefollowingisthecorrectroutetoseeirrawaddydolphins? A.Kampi→PhnomPenh→Kratie B.PhnomPenh→Kampi→Kratie C.Kratie→phnomPenh→Kampi D.PhnomPenh→Kratie→Kampi 4Whatcanwelearnfromthelastparagraph? A.Irrawaddydolphinscanbewatchedclosely. B.Irrawaddydolphinsarenotafraidofpeople. C.Irrawaddydolphinsliketocomerightuptotheboat. D.Irrawaddydolphinsdon'tliveingroups.
如图在平面直角坐标系中△ABC的顶点A在第一象限点BC的坐标分别为2161∠BAC＝90°AB＝AC直线AB交y轴于点P若△ABC与△A′B′C′关于点P成中心对称则点A′的坐标为
InthewatersoffBrisbaneAustraliaasevenfootlongsandtigersharkswimsinpain.Atwofootlongspikesticksoutofherside.It'sapieceoffishingequipmentthatthesharkatecarelessly.Aftertravelingintoherbodythespikepunctured刺throughtheshark'sstomach. Amanswimminginthewaternoticestheshark.ThenhewarnsSeaWorldMarineParkinthenearbytownofGoldCoast.SeaWorldsendsa12personteamfromitsrescuecentertowherethesharkwasdiscoveredinMoretonBayMarinePark.Soontheyfindherlyingontheseafloor.She'lldiewithouthelpsaysTrevorLongleaderoftherescuecenter. Usinganonboardcrane吊车therescuersmovethesharkintotheirboat's13footlongtank缸.ThenDr.DavidBlydegivesthesharkpainmedicineandperformsanoperationtoremovethespike.AfterthattheteamsailswiththesharktoSeaWorld33milesaway.Theyplacethefishina49footlongtankandwaittoseeifshegetsbetter. Togivetheshark'sstomachtimetogetbettersheisn'tfedforthefirstfewdays.AweekafterheroperationLongoffersthesharkasmalldeadfish.Theanimalrefusestoeat.Butdayslaterwhenhedropsanotherfishintohertankthesharkenjoyshermeal.Bynowtheshark'swoundsaregettingbetter. TwoweeksafterherrescuetheytakethesharkbacktotheboatandreturnhertoMoretonBayMarinePark.Asthefishisloweredbythecranetothewater'ssurfacetworescuersjumpintotheoceanandguideherintothesea.FromtheboatLongwatchesherswimaway.ThesharkhasanotherchanceLongsays. 1Whathappenstothesandtigershark? A.Sheisunluckyandgetshurtbadly. B.Shehasnothingtoeatforafewdays. C.SheswimsinSeaWorldandlosesherway. D.Sheisseriouslyillbecauseofseawater. 2AccordingtothetextSeaWorld. A.helpsprotectandsaveanimals B.is33milesawayfromGoldCoast C.hasn'tenoughspaceforanothershark D.hasneverperformedoperationsonsharks 3HowdoesLongfeelwhenfeedingthesharkforthefirsttimeaftertheoperation? A.Veryproud. B.Quiteworried. C.Reallyrelaxed. D.Extremelyafraid. 4Whatwouldbethebesttitleforthetext? A.Dangersfromsharks B.Sandtigersharkrescue C.MoretonBayMarinePark D.ArescueteamfromSeaWorld
TheIsleofSkyeisagreatdestinationforwildlifewatchers.Listedbelowaresomeofthebirdstobeseenwhilevisitingtheisland.Ifyouarekeentoseeasmuchaspossibleduringyourstayitwouldbeworthjoiningawildlifetour. SeaEagle Thewhite﹣tailedeaglecommonlyknownastheSeaEagleisthelargestbirdofpreyinBritainandisonlyfoundonthewestcoastofScotland. Theadultseaeaglehasawingspanof8﹣footandeatsfishrabbitsandothersmallbirds.Thebirdsdiedoutbecausetheywerecaughtandkilledbyfarmers.In1975theSeaEaglewerereintroducedtotheIsleofRumfromNorway.SincethentherareEagleshavegonefromstrengthtostrengthnowwithhundredsofbirdsaroundwestcoastofScotland. Gannet ThegannetisthelargestseabirdinScotlandwithanadultbirdhavingaswingspanofupto6﹣foot.Gannetsarefamousforthewaytheycatchfish.Whentheyspotaschooloffishfromtheairtheyfoldtheirwingsbackanddiveintothewaterathighspeed.Thisisdramatictowatch. Puffin Thepuffinisasmallseabirdthatismadefamousbyitsparrot﹣likemouth.Theyareadivingbirdandanimpressiveswimmerwhenhuntingfish. GoldenEagle Agoldeneagleisnearthetopofanybirdwatcherslist.TheIsleofSkyeisagreatplacetoseetheminthewild.Withaswingspanofupto8﹣foottheyareoneofthelargestbirdsofpreyinBritain.Theirdietincludesmicerabbitsandfishandannoyinglyforthelocalfarmersastheyhavebeenknowntotakewholelambs! 1Howdowildlifewatchersfeelwhenwatchingthegannetcatchfish? A.Verycurious. B.Veryfrightened. C.Veryexcited. D.Veryannoyed. 2Whosedietdothelocalfarmershate? A.Aseaeagle's. B.Agannet's. C.Apuffin's. D.Agoldeneagle's. 3Whatdothefourbirdshaveincommon? A.Theyareallrarebirds. B.Theyalleatfish. C.Theyarealldivingbirds. D.Theyallhavelargeswingspans.
JohnMichaelThomas14Florida WhenJohnMichaelThomasdecidedtohonorhisfriendandclassmateElizabethBuckleywhodiedfromcancerherememberedhowmuchshelovedpeacocks孔雀. Hewantedtobuildalifesizedpeacockfountain喷泉inElizabeth'sfavoriteparkinthecity.Hethoughtitcouldbeaplaceforpeopletorelaxandbeinspired. JohnMichaelraised﹩52000tobuildthefountain. BarrettEngland13Utah ThewheelsbegantoturnforBarrettEnglandwhenheheardaboutKarmaBikeShopaplacewhereyoungpeoplecanearnafreebikebyreadingandperformingcommunity社区service. BarrettvisitedKarma'sownerwithhisideaHewouldcollectandrepairusedbikesanddonate捐赠themtotheshop. Heexpectedtogetabout10donatedbikes.IntheendBarrettreceived39. ZacharyBlohm15Wisconsin The25yearoldplaygroundatanelementaryschoolnearMilwaukeeWis.wassosmallthatonly70ofits575studentscouldplayonitatatime. That'swhenZacharyBlohmsavedthedayHeandsomevolunteersbuiltahugeplayground.ToraisemoneyZacplannedTshirtandbakesalessoldticketsandmore.Heheldmonthlymoneyraisingeventsformorethanayear.Overallhecollected﹩130000﹣enoughtofinishhisproject. JackZimmerman16NewJersey Forsomepeoplefindingamealisassimpleasopeningtherefrigerator.Formorethan366000hungrykidsinNewJerseyit'snotthateasy. Thatfactdidn'tsitwellwithJackZimmermanwhoorganizedadrivetolessenchildhoodhungerinhisstate.Hisgoalcreate40000packagedmealsthatcouldbedonatedtothoseinneed.OngamedayJackandhisvolunteersstartedtheirwork.Afterthefinalcounttheteamhadpackaged47124meals﹣wellaboveJack'sgoal. 1Thepeacockfountainwasbuiltinapark. A.toinspirepeople B.fortheloveofanimals C.inmemoryofateenager D.toencourageacancersufferer 2WhatdidBarrettdoforKarmaBikeShop? A.Hedonatedbikestoit. B.Herepairedbikesthere. C.Hehelpeditwincustomers. D.Heofferedareadingservicethere. 3Whatdothefourpeoplehaveincommon? A.They'retopstudents. B.Theycareaboutothers. C.Theylikevariouspublicactivities. D.They'remoneyraisersforthepoor.
如图▱ABCD的对角线ACBD相交于点OE是AB中点且AE+EO＝4则▱ABCD的周长为
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