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下列化合物在一定条件下，既能发生消去反应，又能发生水解反应的是（ ）
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下列物质中在一定条件下既能发生水解反应又能发生银镜反应的是
蔗糖
葡萄糖
乙酸乙酯
麦芽糖
下列物质中在一定条件下既能发生银镜反应又能发生水解反应的是
甲酸甲酯
蔗糖
葡萄糖
淀粉
下列物质中在一定条件下既能发生消去反应又能发生水解反应的是
一氯甲烷
乙醇
溴乙烷
下列化合物中既能发生消去反应又能发生水解反应的是
一氯甲烷
氯乙烷
乙醇
乙酸乙酯
下列关于有机物的说法正确的是
糖类、油脂、蛋白质在一定条件下均可以水解
有机物命名为：2-甲基-1-丙醇
2-氯丁烷发生消去反应的生成物无异构体
油酸甘油酯既能发生水解反应又能发生氢化反应
下列化合物在一定的条件下既能发生消去反应又能发生水解反应的是
①②
②③④
①②③④
②
下列化合物中既能发生消去反应又能发生水解反应的是
①③④
①④
②③④
②④
下列化合物中既能发生消去反应又能发生水解反应的是
氯仿
一氯甲烷
乙醇
氯乙烷
下列物质中在一定条件下既能发生银镜反应又能发生水解反应的是
葡萄糖
蔗糖
乙酸乙酯
麦芽糖
下列化合物在一定条件下既能发生消去反应又能发生水解反应的是
CH
3
Cl
下列说法不正确的是
石油的分馏和煤的干熘不都是物理变化
乙炔与苯都可发生氧化反应
甲烷、乙醇在一定条件下都能发生取代反应
淀粉、油脂、蛋白质等天然有机高分子化合物在一定条件下都能发生水解反应
下列化合物中既能发生消去反应又能发生水解反应的是
氯仿
一氯甲烷
乙醇
氯乙烷
下列物质在一定条件下既能发生水解反应又能发生银镜反应的是
葡萄糖
麦芽糖
纤维素
甲酸丙酯
下列物质中在一定条件下既能发生银镜反应又能发生水解反应的是
葡萄糖
淀粉
甲酸甲酯
油脂
下列化合物在一定条件下既能发生消去反应又能发生水解反应的是
①②
②③④
②
①②③④
下列化合物中能够发生消去反应又能发生水解反应的是
一氯甲烷
二氯甲烷
氯乙烷
乙醇
下列化合物中既能发生消去反应又能发生水解反应的是
氯仿
氯甲烷
乙醇
氯乙烷
下列物质中在一定条件下既能发生水解反应又能发生银镜反应的是
麦芽糖
葡萄糖
蔗糖
乙酸乙酯
下列物质中在一定条件下既能发生消去反应又能发生水解反应的是
一氯甲烷
乙醇
溴乙烷
下列物质中在一定条件下既能发生银镜反应又能发生水解反应的是
甲酸甲酯
蔗糖
葡萄糖
麦芽糖
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4分全副武装的警察总在__后最先到达现场的人群之中.among
8分YouAreWhatYouEatGeneticengineeringisthescientificchangeofthegeneticmaterialinalivingorganism.Itallowsscientiststoidentifyspecificgenestoremovethemfromanorganism'schromosomes染色体improvethemanalyzethemandpossiblyclonethemandtothenreinsertthechangedgeneintotheoriginalorganismoracompletelydifferentorganism.Unliketraditionalbreeding繁殖whereadesiredqualitywouldbebredwithinthesamespeciesgeneticengineeringcaninsertdesiredonesintoorganismsofdifferentspecies.Wow﹣﹣DidyoucatchthatGeneticengineeringcreatesmanypositivecontributionstoagriculture.ForexamplebygeneticallyengineeredGEfoodsanti﹣canceragentsmineralsandvitaminscanbeincreased.Improvedtasteshelflifeandbettertransportareallpossible.AlsoGEplantscanincreasepestandbacterialresistancethereforemakingthefoodsafeforconsumers.Butsomearguethatthepossiblenegativeeffectsoutweighthepositivesandcriticsarestartingtovoicetheirconcerns.UnlikeEuropeintheUnitedStateslabelingisnotrequiredongeneticallyengineeredfoodsoronfoodsthatcontaingeneticallyengineeredproducts.MostAmericansdonotrealizethattheyareinfacteatingGEfoods.Thepublicisalsoconcernedabouttheunknownhealthrisks.Withlimitedunderstandingofgenesscientistscannotpredictpossibleeffects.BecausemostgenesintroducedintoGEplantscomefromsourcesnotintroducedintothehumanbodyitisimpossibletoknowiftheywillcausereactions.Moreoverduetothelackoflabelingifallergies过敏developitwillbeextremelydifficulttofindtheoriginofthem.Thereisalsoamajormoralquestioninmanyminds.Formanytheconflictisnotifitissafeornotbutitdisturbsthembecauseitisunnaturalandunnecessary.Wearecurrentlyproducingoneandahalftimestheamountoffoodneededtofeedtheworldyetoneinsevenpeoplearestarving.GEfoodisunnecessaryandfailstoaddresstherootofhunger.Manybelievethattheonlypeoplewhowillbenefitarethecorporationsthatproduceit.ScientistscannotforeseethepossibleeffectsofGEfoodsyetweeatthemeverydaywithoutevenknowingit.WealreadyhaveenoughfoodsowhycreatemorethatcouldbepotentiallyharmfultoustotheEarthandtoallwildlifeIthinkthatthebenefitsareamazingbutuntilweknowforsurehowthesefoodswillaffectustheyarenotworththerisk.1Accordingtothepassagetraditionalbreedingisdifferentfromgeneticengineeringbecause.A.traditionalbreedingchangesthegenesinthesamespeciesB.traditionalbreedingchangesthegenesindifferentspeciesC.traditionalbreedingtakesplacewithinthesamespeciesD.traditionalbreedingismorescientific2'Thelackoflabeling'inParagraph4indicates.A.informationconcerninggenesourcesisunavailabletocustomersB.itiscurrentlypossibletofindtheoriginsofsomeallergiesC.scientiststrytohidepotentialdangersfromcustomersD.theUSgovernmentisresponsibleforGEfood3AccordingtoParagraph5GEfoodisunnecessarybecause.A.itwon'thelpsolvetheproblemofhungerintheworldB.therearepotentialdangersinproducingGEfoodC.we'renowproducingmorefoodthanbeforeD.customerswillbenefitfromGEfood4Whatistheauthor'sattitudetowardsgeneticengineeringA.Welcoming.B.Disapproving.C.Unconcerned.D.Optimistic.
8分DearSallyIrecentlybecameengaged.Ilovemyfiancé未婚夫alotbutwearegettingintoalotofarguments1ourweddingplans.Iwouldpreferasmallweddingjustourimmediatefamilyandclosestfriends.IthinkitissuchaspecialmomentandIonlywantthepeoplewhoaremostimportanttobenearus.Idon'twanttobesurroundedbypeoplenotreally2careaboutus.Hewantsthewholeworldtobethere﹣﹣themailcarrierthebakerthebutcher!!!Myfiancésaysaweddingdayis3importantdayinanyone'slife.Hewantstosharehisjoywitheveryone.It'snotaquestionwhetherwecanafforditalthoughIdoworryabouthowmuchaweddingcostsandIwouldrathersavethemoneyforahouse.Idislike4fightbutIjustdon'tfeelcomfortablewithhisplans.﹣﹣NervousDearNervousPlanningweddings5beverystressful.Eachpersonhasclearideasabout6hisorherperfectweddingwouldbe.Eachpersonhasdreamsandhopesforthatday.Nowitis7goodtimetopracticecompromising妥协withyourhusband﹣to﹣be.Neitheroneofyoushouldbeunhappyonyourweddingday.Ifyougetyourwayyourhusbandwillbeunhappy.Ifhegetshiswayitsounds8youwillbeunhappy.Whydon'tthetwoofyoutalkaboutacompromisePerhapsamedium﹣sizedweddingPerhapstwoweddings﹣﹣asmallintimateceremonyandalargereceptionYouwillhavetocompromisemanytimesinyourmarriedlife.Youbothcanstartnow.﹣﹣Sally
1分Linglingsaidactionfilms. A.thatshedoesn'tlike B.ifsheliked C.doesshelike D.shedidn'tlike
15分Onedayawolfhadabone1stickinhisthroatunexpectedlyand2suffergreatestpain.Heran3anddownaskingeveryanimalhemettoremovethebonefromhimatthesametime4suggestarewardtothesuccessfuloperator.Acrane鹤movedby5promiseventuredherlongneckdownthewolf'sthroatanddrewoutthebone.Shethenaskedforthepromisedreward.Toherquestionthewolfshowinghisteethwith6uglysmilerepliedUngratefulcreature!Youputyourheadintoawolf'smouthandtookitoutin7safe.8dareyouaskformorerewardthanthis Those9areonlyinthehopeofareturnmustnotbesurprisedwhentheycomefacetofacewithbadmen.Whattheymeetwitharemorelaughs10thanks.
10分 Youneverseehimbutthey'rewithyoueverytimeyoufly.Theyrecordwhereyouaregoinghowfastyou'retravelingandwhethereverythingonyourairplaneis1normally.Theirabilitytowithstand承受almostany2makesthemseemlikesomethingoutofamagicbook.They'reknownastheblackbox. WhenplanesfallfromtheskyasaYemeniairlinerdidonitswaytoComorosIslandsintheIndiaOceanJune302009theblackboxisthebestbetfor3whatwentwrong.SowhenaFrenchsubmarine潜水艇detectedthedevice's4fivedayslaterthediscoverymarkedahugesteptowarddeterminingthecauseofatragedyinwhich152passengerswerekilled. In1958AustralianscientistDavidWarrendevelopedaflight﹣memoryrecorderthatwould5basicinformationlikealtitudeanddirection.ThatwasthefirstmodeforablackboxwhichbecamearequirementonallU.S.6flightsby1960.Earlymodelsoftenfailedtowithstandcrasheshoweversoin1965theboxwascompletelyredesignedandmovedtothebackoftheplane﹣thearealeastaffectedbyimpact﹣fromits7positioninthelandingwells起落架舱.ThesameyeartheFederalAviationAuthorityrequiredthattheboxeswhichwerenever8blackbepaintedorangeoryellowtoaidvisibility. Modernairplaneshavetwoblackboxes:avoicerecorderwhichisdesignedtotrackpilots'conversationsandaflight﹣datarecorderwhichismeantto9fuellevelsenginenoisesandotheroperatingfunctionsthathelpinvestigatorsreconstructtheaircraft'sfinalmoments.Placedinaninsulated隔绝的caseandsurroundedbyaquarter﹣inch﹣thickpanelsofstainlesssteeltheboxescanwithstandhuge10andtemperaturesupto2000℉.Whenindeepwaterthey'realsoabletosendsignalsfromdepthsof20000ft.ExpertsbelievetheboxesfromAirFranceFlight447whichcrashednearBrazilonJune12009areinwaternearlythatdeepbutstatisticssaythey'restilllikelytoturnup.Intheapproximately20deep﹣seacrashesoverthepast30yearsonlyoneplane'sblackboxeswereneverrecovered.
8分Shynessisthecauseofmuchunhappinessforagreatmanypeople.Shypeopleareanxiousandself﹣conscious;thatistheyareconcernedabouttheirownappearanceandactionstoomuch.Negativethoughtsareconstantlyoccurringintheirminds:WhatkindofimpressionamImakingDotheylikemeDoIsoundstupidAmIwearingunattractiveclothesItisobviousthatsuchuncomfortablefeelingsmustaffectpeopleunfavorably.Aperson'sself﹣conceptisreflectedinthewayheorshebehavesandthewayapersonbehavesaffectsotherpeople'sreactions.Ingeneralthewaypeoplethinkaboutthemselveshasadeepeffectonallareasoftheirlives.Shypeoplewhohavelowself﹣respectarelikelytobepassiveandeasilyinfluencedbyothers.Theyneedfaiththattheyaredoingtherightthing.Shypeopleareverysensitivetocriticism.Itmakesthemfeelinferior.Theyalsofinditdifficulttobepleasedbypraisesbecausetheybelievetheyareunworthyofpraise.Ashypersonmayrespondtoapraisewithastatementlikethisone:You'rejustsayingthattomakemefeelgoodIknowit'snottrue.Itisclearthatwhileself﹣awarenessisahealthyqualityoverdoingitisharmful.CanshynessbecompletelygotridoforatleastreducedFortunatelypeoplecanovercomeshynesswithdeterminationsinceshynessgoeshandinhandwithlackofselfrespect.Itisimportantforpeopletoaccepttheirweaknessaswellastheirstrengths.Eachoneofushashisorherowncharacteristics.Weareinterestedinourownpersonalways.Thebetterweunderstandourselvestheeasieritbecomestoliveuptoourchancesforarichandsuccessfullife.1Thefirstparagraphismainlyabout.A.thecauseofshynessB.theeffectofshynessonpeopleC.thefeelingsofshypeopleD.thequestionsinthemindsofshypeople2Accordingtothewriterself﹣awarenessis.A.harmfultopeopleB.aweakpointofshypeopleC.thecauseofunhappinessD.agoodcharacteristic3Whatistheshypeople'sreactiontopraiseA.Theyarepleasedbyit.B.Theyfeelitisnottrue.C.Theyareverysensitivetoit.D.Theyfeeltheyareworthyofit.4Wecanlearnfromthepassagethatshynesscan.A.blockourchancesforasuccessfullifeB.helpustoliveuptoourfulldevelopmentC.enableustounderstandourselvesbetterD.havenothingtodowithlackofselfrespect
10分HaveyouconsideredhowyoucanplanaweekendgetawayonabudgetItisthegrowingtrendforhardworkingAmericanstotakeseveralweekendtripsoverthecourseofayearinsteadofonelargeweek﹣longvacation.Thereareavarietyofthingstoseetoanddowithoutspendingalongtimeoralotofmoneydoingit.Sohowcanyouafunandunforgettableweekendgetawaywithabudget1LeavingonThursdayswillallowmuchcheaperpricesonplaneticketshotelroomsrentalcarsandvacationpackages.Avoidtravelingonholidayweekends.PricesareraisedandthingsarebookedearlyandsoldoutonweekendsduringtheholidayssuchasMemorialDayNationalDayThanksgivingandLaborDay.2Considertravelinglastminute.Althoughitmaybehardtoplanespeciallyifchildrenareinvolvedmanyplacessuchashotelsandairlinesoffergreatdiscountedratesforlastminutebookings.3Findcheapthingstodo.Someofthesemayincludenationalorstateparksamusementparksstatefairsandcamping.Saveevenmoremoneybyfindingsomethingnearbywithindrivingdistanceinsteadofflying.Havearelaxingweekendbygettingmuchrest.Don'tcram塞满alotofthingstodointoaweekendtrip.Notonlywillthissavemoneybutitwillofferarefreshingpick﹣upandnotfindthetravelermoretiredafterthetripthanbefore.4Traveltoplacesduringdowntimes.DestinationssuchastheCaribbeanandskiresortsoffermanyfunactivitiesduringthesummerwhichisnotpeaktravelingtime.5A.Bewellpreparedbeforehand.B.Sodon'tplanaholidayweekend.C.Travelingabroadwillincreaseyourtravelcost.D.Travelinglastminutecansaveyousomemoney.E.Priceswillbemuchlowerduringthesetimes.F.StarttheweekendonThursdayinsteadofFridaytosavemoney.G.Spendtheweekendinthewoodsreadinganovelorbaskinginthesun.
6分Myson.ThephrasefeltdifficultandstrangethefirsttimeIsaiditandIhadtopracticeitathousandtimes.Istartedsayingthewordstomyselfthedaywhentheultrasound超声波toldmewewerehavingababy. Finallymysonwasborn. Thenursecameoutofthedeliveryroomholdingatinyhowlinghumanbeingwrappedinawhitesheethissmallhandsanddelicatefingersshakingnervously. BabySanchezsheaskedlookingattheroomfullofexpectantfathers. Istoodupholdingmybreath. Sheshowedmemybaby.MysonIwhispered.Thelittleguyscreamedwaaaaaaaaaah. ButinmyheartIheardhimcryoutDaaaaaaad!Idon'tcareifeveryoneintheroomwillsaytheydidn'thearmybabysaythat.IcalledhimMysonandhecalledmeDadandthat'sthat. PeopleaskmeWhatdidIfeelatthatmomentIcan'tevenbegintoanswer.I'mawriteryetItryhardtofindtherightwords.Joyfulisn'tpowerfulenough.Bliss狂喜isnotsweetenough.Peacefulisn'tcalmenough.Happyisn'ttenseenough. AftermysonwastakenawaytothenurseryIsatdownandshutmyeyes.Buttearsescapedthemaway.Thensuddenlymy80﹣year﹣oldfatherenteredandweembraced拥抱. DadIwhispered. Mysonmyheartheardhimsaying. Suddenlythepast33yearsfoldedintothepresentandIwasnowthebabybundledinwhitewithmyfatherstandingoverme. MysonIimaginedhimsaying. Daaaaaaaaaad!Icriedmylittlelungsout. AtthatpointIknewIwasgoingtobeagreatfather.Theoldmaninfrontofmeseemedtoagree.Hesmiledandwewalkedoutoftheroominsearchofthelittlehumanbeingthatwouldchangeourlivesforever. 1Theauthorcouldn'ttellhowhefeltatthemomentbecause. A.hewasawriter B.hewastooexcited C.hewastoonervous D.it'safeelingtoohardtoexpress 2WecanlearnthefollowingfromthepassageEXCEPTthat. A.theauthorgothisfirstbaby B.heprobablyhadalungdisease C.theauthordidn'treallyhearDaaaaadfromhisbaby D.thebabywouldchangetheauthor'slife 3Whywasthewritersurehewasgoingtobeagreatfather A.Becausehissonissogifted. B.Becausehehadmuchexperienceinbringingupchildren. C.Becausehisfatherpromisedtohelphim. D.Becausehisfatherhadalreadysethimagoodexample.
2分鸡蛋对我们的健康有益. Eggsareourhealth.
30分IwasshoppinginasupermarketlastnightwhenIsawahomelesswomanwithatrolley手推车fullofallherthings.Shewassittinginsidetokeep1.Iwentuptoherandtriedtogiveher2forsomethingtoeat.Shewouldn't3it.IsaidIwantedtohelpher4shesaidthatifenoughmoneywasgiventoherthatdayandshehadmoneyonherotherhomelesspeoplewould5itfromherwhilesheslept. I6thatIwantedtohelpherandaskedifIcouldbuyhersomethingwarm.7shesaidno.Shethankedmeandsaidhow8shewasthatIhadspokentoherandoffered9.WeintroducedourselvesandshesaidthatwhenIsawherthenexttimeshewould10accepthelp. Iwalkedoutintothecoldwinter11andgavethemoneytoahomelessmanwhowasfreezing.Iaskedhimhisname12IalwayswanttoknowandItoldhimmine.HappearedtohavehadadrinkingordrugproblembutIwas13thatheacceptedmyhelp. Ihadthis14thatstayedwithme.IfeltthatIhadbeeninthepresenceofsomeonereallyspecialearlier.Ialways15whatitwouldbeliketobeinahomelessperson'sshoesIknowhow16IamandhowgratefulIamforwhatI17inmylife. Ilearnedavaluable18fromtheladyImet:Notall19peoplewilltakemoneyorhelpiftheyfeelenoughhasbeengiventothemthatday.Shewasgratefulfortheday.IwillmakesureI20heragain. 1Acalm B.warm C.healthy D.energetic 2A.time B.freedom C.money D.choice 3A.take B.make C.eat D.receive 4A.and B.or C.so D.but 5A.spend B.steal C.find D.hide 6A.agreed B.wondered C.apologized D.explained 7A.Again B.Besides C.Instead D.Thus 8A.proud B.curious C.regretful D.grateful 9A.help B.food C.strength D.advice 10A.generously B.willingly C.slightly D.politely 11A.morning B.noon C.afternoon D.night 12A.unless B.when C.because D.though 13A.glad B.sure C.astonished D.puzzled 14A.hope B.feeling C.belief D.courage 15A.expect B.believe C.imagine D.remember 16A.lucky B.unique C.serious D.confident 17A.observe B.own C.support D.respect 18A.fact B.quality C.lesson D.subject 19A.lonely B.hungry C.helpless D.homeless 20A.call B.ask C.meet D.follow
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