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某小组同学通过实验研究FeCl3溶液与Cu粉发生的氧化还原反应．实验记录如表：下列说法不正确的是（ ）
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高三下学期化学《》真题及答案
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某校化学兴趣小组探究SO2与FeCl3溶液的反应所用装置如下图所示夹持仪器已略去1实验前应先检查装置
物质氧化性还原性的强弱不仅与物质的结构有关还与物质的浓度和反应温度有关下列各组物质①Cu与HNO3溶
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物质氧化性还原性的强弱不仅与物质的结构有关还与物质的浓度和反应温度有关下列各组物质①Cu与HNO3溶
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物质氧化性还原性的强弱不仅与物质的结构有关还与物质的浓度和反应温度等有关下列各组物质①Cu与HNO3
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物质氧化性还原性的强弱不仅与物质的结构有关还与物质的浓度和反应温度等有关下列各组物质①Cu与HNO3
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物质氧化性还原性的强弱不仅与物质的结构有关还与物质的浓度和反应温度有关下列各组物质由于溶液浓度不同而
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物质氧化性还原性的强弱不仅与物质的结构有关还与物质的浓度和反应温度等有关下列各组物质:①Cu与HNO
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物质氧化性还原性的强弱不仅与物质的结构有关还与物质的浓度和反应温度等有关下列各组物质①Cu与HNO3
物质氧化性还原性的强弱不仅与物质的结构有关还与物质的浓度和反应温度等有关下列各组物质①Cu与HNO3
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物质氧化性还原性的强弱不仅与物质的结构有关还与物质的浓度和反应温度等有关下列各组物质①Cu与HNO3
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物质氧化性还原性的强弱不仅与物质的结构有关还与物质的浓度和反应温度等有关下列各组物质①Cu与HNO3
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物质氧化性还原性的强弱不仅与物质的结构有关还与物质的浓度和反应温度等有关下列各组物质①Cu与HNO3
铁和铝是日常生活中用途广泛的金属I..1向AlCl3溶液中滴加氨水溶液生成白色胶状沉淀则发生反应的离
物质氧化性还原性的强弱不仅与物质的结构有关还与物质的浓度和反应温度有关下列各组物质①Cu与HNO3溶
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物质氧化性还原性的强弱不仅与物质的结构有关还与物质的浓度和反应温度有关下列各组物质由于浓度不同而能发
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在下列有FeCl3溶液参加的反应中与Fe3＋发生氧化还原反应的是①FeCl3与Cu反应②FeCl3与
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下列单质或化合物性质的描述正确的是
NaHSO4水溶液显中性
SiO2与酸、碱均不反应
NO2溶于水时发生氧化还原反应
Fe在足量Cl2中燃烧生成和FeCl2和FeCl3
物质氧化性还原性的强弱不仅与物质的结构有关还与物质的浓度和反应温度有关下列各组物质①Cu与HNO3溶
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物质氧化性还原性的强弱不仅与物质的结构有关还与物质的浓度和反应温度等有关下列各组物质①Cu和HNO3
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物质氧化性还原性的强弱不仅与物质的结构有关还与物质的浓度和反应温度等有关下列各组物质①Cu与HNO3
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将适量等长度等体积的相同土豆条均分为三组分别置于等体积的甲乙丙溶液中一段时间甲溶液与丙溶液的溶质是同种物质直至b时后均同时放回相应溶液的低浓度溶液中一段时间．实验期间持续观察土豆条体积变化并计算相对体积结果如图以下说法正确的是
PracticalWaystoShowRespectforaFriend ●Showrespectfortheirlifechoicesanddecisions 1.Theywillmakedifferentlifechoiceshavedifferentviewsonpoliticsandreligionandactdifferentlyinmanyways.Thisdoesn'tmeantheycan'tbeyourfriend.Itmeansthatyou'llneedtotakeastepbackreservejudgmentandshowrespect. ●Givethemthebenefitofthedoubt Assumptions猜疑canbeadangerousthing.2.Berespectfulandgivethemthebenefitofthedoubtwhenyoudon'tdo.Thisalonewillhelpyoustayintheirgoodgraces好感. ●Givefriendsyourfullattention Oneofthebestwaystoshowrespectforsomeoneistolistentothemfully.Allowthemtopauseconveynonverbalcommunicationcluescollecttheirthoughtsandgetitallout.Toooftenfriendslistenwithhalfanearorjumpintheminutetheirfriendpauseswithanevenworsestory3.Whenyourfriendistalkingpayattention. ●4 Treatyourfriendsrespectfullywhenyouarguewiththem.Makeyourfriendshipasafeplacebynotembarrassingyourfriendorexpressingyourprivatedisagreementsinfrontofotherpeople.Bepubliclysupportiveandkindtoyourfriendssotheyknowyouvalueyourfriendshipwiththem. ●Showupbethereanddowhatyousayyou'regoingtodo 5.Sojustshowyourfriendthebestkindofrespectbybeingontimekeepingpromisesandbeingtheonefriendtheycanalwayscounton.That'sthewaytotrulyshowrespect. A.Acceptthatpeoplearen'talwaysgoingtobejustlikeyou. B.Noonelikesanunreliablefriendwhosaysthey'llbethereandthendoesn'tshow. C.Tellyourfriendswhatyouthinkaboutthemdirectly. D.Thistypeofbehaviorisverydisrespectful. E.Infactyoucandoeverythingbutacceptthedifferences. F.Ifyou'reindoubtaboutsomethingaskyourfriend. G.Consideryourfriendshipapreciousgift.
Alargebodyofresearchhasbeendevelopedinrecentyearstoexplainmanyaspectsofwillpower.Mostoftheresearchersexploringself﹣controldosowithanobviousgoalinmindHowcanwillpowerbestrengthened?Ifwillpoweristrulyalimitedresourceastheresearchsuggestswhatcanbedonetomakeitstaystrong? Avoidingtemptation__isaneffectivemethodformaintainingself﹣controlwhichiscalledtheoutofsightoutofmindprinciple.Onerecentstudyforinstancefoundofficeworkerslessattractedtocandyinthedeskdrawerthanthatontopoftheirdesksinplainsight. Theresearchsuggestingthatwepossessalimitedreservoirofself﹣controlraisesatroublingquestion.Whenwefacetoomanytemptationsarewetofail?Notnecessarily.Researchersdon'tbelievethatone'swillpowerisevercompletelyexhausted.Ratherpeopleappeartoholdsomewillpowerinreservesavedforfuturedemands.Therightmotivationallowsustotapintothosereservesallowingustocarryonevenwhenourself﹣controlstrengthhasbeenrundown.Highmotivationmighthelpovercomeweakenedwillpower﹣atleasttoapoint. Willpowermayalsobemadelessvulnerable脆弱tobeingexhaustedinthefirstplace.Researcherswhostudyself﹣controloftendescribeitasbeinglikeamusclethatgetstiredwithheavyuse.Butthereisanotheraspecttothemusclecomparisontheysay.Whilemusclesbecomeexhaustedbyexerciseintheshorttermtheyarestrengthenedbyregularexerciseinthelongterm.Similarlyregularpracticesofself﹣controlmayimprovewillpowerstrength. Theevidencefromwillpower﹣exhaustionstudiesalsosuggeststhatmakingalistofresolutionsonNewYear'sEveistheworstpossibleapproach.Beingexhaustedinoneareacanreducewillpowerinotherareassoitmakesmoresensetofocusonasinglegoalatatime.Inotherwordsdon'ttrytoquitsmokingadoptahealthydietandstartanewexerciseplanatthesametime.Takinggoalsonebyoneisabetterapproach.OnceagoodhabitisinplaceBaumeistersaysyou'llnolongerneedtodrawonyourwillpowertomaintainthebehavior.Eventuallyhealthyhabitswillbecomeroutineandwon'trequiremakingdecisionsatall. 1Fromthestudiesinthepassagewelearnthat. A.peoplehaveunlimitedself﹣control B.highmotivationensuresone'ssuccess C.willpowerishardlycompletelyexhausted D.toomanytemptationsoftenleadtofailure 2TheunderlinedphrasetapintoinParagraph3mostprobablymeans. A.makeuseof B.runoutof C.build D.increase 3Theauthorcomparesself﹣controltomuscles. A.toprovethelong﹣termeffectofwillpower B.toshowthesignificanceofregularexercise C.toarguethatself﹣controlcanheeasilyusedup D.toexplainthebenefitsofpracticingself﹣control 4Todevelopagoodhabitwhichofthefollowingdoestheauthorprefer? A.Iwillgiveupdessertanddoexercise. B.Iwillsetthreegoalsthisnewsemester. C.IwillreadanEnglishnoveleverymonth. D.Iwillkeepmyselffromanytemptation.
血糖浓度保持动态平衡对机体生命活动具有重要作用如右图为胰岛素作用机理模式图请分析回答 l胰岛素的生理功能是能促进组织细胞加速摄取和葡萄糖从而使血糖浓度降低． 2胰岛素属于一种信息分子除激素外人体内还有举一例也为信息分子胰岛素与靶细胞表面的受体结合后发挥作用受体的化学本质是． 3当正常人处于饥饿状态时血液中胰岛分泌的写激素名称含量增多它与胰岛素相互共同维持血糖含量的稳定． 4人体感染某病毒时胰岛B细胞会被自己的免疫细胞破坏引起I型糖尿病在免疫上这类疾病可称为II型糖尿病表现为组织细胞表面受体受损对胰岛素敏感性降低现有甲正常乙I型丙II型三人一次口服较多葡萄糖后三人的胰岛素分泌量由高到低的顺序是．
ToeducateagirlistoeducateathousandpeoplesaysMaimounaSamakéamotherofsixchildrenincludingfivegirls.Ifyouputoneseedinthegroundandraincomesitwillgrowtoproducemanyseeds. Samakéoneof2000residentslivesinasmallvillageSounkalainoneoftheworld'spoorestcountries.NowshehasachancetoseethiswishcometruethankstoBuildOnanAmericannon﹣profitorganizationthatisbuildingaschoolinhercommunity. For17yearsBuildOnhasbeensendingAmericanhighschoolstudentsoverseastocreateschoolsinplaceswhereliteracy文化andformaleducationareusuallyoutofreach.Theorganizationhasbuiltabout300schoolsinMaliMalawiNepalSenegalNicaraguaandHaiti.ItsgoalistogetyoungAmericansinmostlyurbanareastogetinvolvedineducation.Atthesametimeitcanbringliteracytochildrenandadultsinpoorvillagesinthedevelopingworld. Sounkala'scurrentschoolonlyhasabout70childrenmudfloorspoorlightingfewdesksandanabsenceofbooksmeanthattheschoolisnotthemostideallearningenvironment.ThereforetheycertainlycoulduseBuildOn'shelp. Samakéhasn'tbeentoschoolbutshewantsabetterfutureforherfivedaughtersincludingRamatou12andMariam10.WhenawomanattendsschoolshewillteachwhatshelearnstoherchildrensaidRamatouwhowantstobecomeadoctor.Shewillalsoknowhowtotakebettercareofherfamily. BuildOntriestobuildschoolsforgradesonetothree.Ifthingsgowelloverthosethreeyearstheyreturntohelpbuildanotherschoolforgradesfourtosixandthensetupeveningadultliteracyclasses. RamatouandMariamwillnotlearninsidethewallsofBuildOnschoolsincetheyarealreadyinthesixthgradebutSamakéhopesthattheywillbeabletoattendeveningclassestocontinuelearning. 1WhichofthefollowingaspectsofBuildOnisNOTmentionedinthetext? A.Itssourcesoffunding. B.Itshistory. C.Itsgoal. D.Itsapproach 2AccordingtothetextWhatkindofschoolisBuildOnmostlikelytohelp? A.inavillageinadevelopedcountry B.inanurbanareainadevelopingcountry C.inaruralareainadevelopingcountry D.inanearthquake﹣strickenareainadevelopedcountry 3WhatdoweknowaboutSamakéandherfamily? A.Mariamisinthesixthgrade. B.Samakéiswell﹣educated. C.Ramatouisadoctor. D.Samakéonlyhasdaughters. 4What'sthemainideaofthepassage? A.Awoman'sdreamofgoingtoschool. B.People'seducationconditionsinpoorareas C.BuildOn'sgreatcontributionstoeducationandlife. D.Anorganizationthathelpsbuildschoolsforpeopleinpoorareas
Lookingforsomeplacesoutofthisworldtovisitonvacation?Herearefourcoolplacestovisit. KennedySpaceCenterVisitorComplex LocatedintheeastofOrlandoFloridait'sconsideredasthegreatestspaceadventureonEarth.Youcanmeetastronautseatspacefoodwatchmoviesaboutpastspacemissionsandifyou'reluckygettowatchanewlaunchdependingonthespaceprogram'sschedule.Remembertotakeenoughmoneyforadmissionandvarioussouvenirsintheworld'slargeststoredevotedtospacesouvenirsandNASAclothingandequipmentwhichmightcostafortune. AmericanMuseumofNaturalHistory It'sanimportantscientificandculturalinstitutionwithextremelyimpressiveexhibitionsandcollectionsabouthumanculturesthenaturalworldandtheuniverse.Themuseumlookslikeahugeglassboxwithahugeglobeenclosedwhichisquiteattractivetopeople.ItcontainsspaceandastronomyexhibitsamodelsolarsystemandthebeautifulHaydenPlanetarium天文馆. NewMexicoMuseumofSpaceHistory NobodywouldexpectsuchacoolspacemuseuminthedesertnearWhiteSandsNewMexicobutinfactthereisone!Thismuseumrecordsthearea'sspacehistory.Admissionticketsareavailableonthewebsiteanditoffersdiscountsforseniorcitizensandyoungstersunderage12. LowellObservatory TheLowellObservatorylocatedonMarsHilloverlookingFlagstaffwasbuiltinthelate1800sbyMassachusettsastronomyenthusiastPercivalLowelltohelphimstudyMars.VisitorstoLowellObservatorycanseethedomevisitClydeTombaugh'stombtaketoursandparticipateinastronomycamps.Theobservatoryisatanaltitudeofabout7200feetsobringsunscreendrinklotsofwaterandtakefrequentbreaks. 1WhatwillyouprobablyfaceinKennedySpaceCenterVisitorComplex? A.Riskysurrounding. B.Adventurousastronomycamps. C.Terriblespacefood. D.Relativelyhighconsumption. 2WhatisspecialaboutNewMexicoMuseumofSpaceHistory? A.Itssize. B.Itshistory. C.Itslocation. D.Itsbudget. 3Wherearevisitorsadvisedtohavemorerest? A.InKennedySpaceCenterVisitorComplex. B.InAmericanMuseumofNaturalHistory. C.InNewMexicoMuseumofSpaceHistory. D.InLowellObservatory.
ItseemsasifChristmasandtheirbirthdayaren'tenough.Kidshaveanotherdaywhichrevolves围绕aroundthem.TherearealotoffunnyactivitiesinShanghaiespeciallyforfamiliesasChildren'sDayfallson1stJune. IndooractivitiesatBigE BigEisagreatplaceforkids.Allkindsofballgamescanbefoundhere.ThisSundaytherearesomeotherinterestingactivitiesfreemoviesandamagicshowwiththreesessions场between9amand6pm. TheWizardofOzatKerryHotel IfeatingandrelaxingiswhatyourfamilyareinterestedinKerryHotelshouldbeyourfavouriteplace.TheCOOKandTheMEATbothofferexcellentbrunch早午餐everyweekend.BesidesTheBREWwillorganizeTheWizardofOzforchildreninarepeatofitsspecialEasterperformance. BrunchatCityBistro Ifyou'relookingforarestaurantwithamorerelaxingatmosphereandlowerpricethaneitherTheCOOKorTheMEATthengotoCityBistro.AspecialdiscountonitsbrunchthisSundayhasneverhappenedbefore.Whileparentsareenjoyingthefoodtheirchildrencanplayinthekids'cornerandletparentscatchtheirbreath. Children'sexhibitionatGalleryG1 IfgoingoutforbrunchistooregularfamiliescantrysomethingalittlemoreculturalatGalleryG1.Thereisanexhibitionofchildren'sartworknamedMySkywhichwillbedisplayedthisweekend.Therearealsoanumberofartistic艺术的activitiesforkidstotry. GetcreativeatPetitChameleon PetitChameleonattheDaycarecentreisorganizinganewactivitynamedArtfromtheStarttoshowkids'creativeability.TheeventisaboutancientGreece.OnSundayyouwillseekidsmaketheirownarmors盔甲. 1TheCOOKandTheMEATare. A.funnyactivities B.activitycenters C.greatperformers D.famousrestaurants 2HowdoesCityBistroattractpeople? A.Byprovidingfreeperformance. B.Byofferingkidsmanyfreetoys. C.Byservingbrunchatalowerprice. D.Byhelpingtakecareofkidsforpeople. 3WhereshouldchildrenwholovesportsgoonChildren'sDay? A.BigE. B.KerryHotel. C.CityBistro. D.GalleryG1.
Foodisnecessaryforofferingenergytoourbodiesbutsometimeswebuytoomuchofitatthestore.Whenyourfoodstartstogobadtherearemanyotherwaysyoucanstillmakeuseofitinsteadofthrowingitaway. Beforethrowingawayoldbananasyoucanusethepeels皮toshineupmetalsandleathers.Pressthepeelagainstthesurfacemoveitbackwardsandforwardsandthenpolishcleanitwithanoldcloth.Bananameatisalsogoodforreducingwrinkles.Putabitonthosetroublespotsletitsitforawhileandthenwashitoffandyourwrinkleswillgoaway.Lemonsaregreatforlighteningskinandhair.Ifyouhavetroublewithsomeskindiseaseslikeredspotsonyourfaceputabitoffreshlemonjuiceonthemandleaveitovernight.You'llnoticeadifferenceinthemorning.Appleswillhelpripen使成熟tomatoesquicklywhentheyareplacedtogetherinapaperbagandorangepeelsaregreatfirestartersforyournextbackyardcampfireparty. Ifyourdogorcatbringshomefleasusingsaltisagreatwaytogetridofthemaroundthehouse.Justpoursaltintothevacuumcleaner真空吸尘器.Letitsitthenvacuumupthefleas.Thesaltcankillthefleas.Besuretothrowawaythevacuumbagoremptythevacuumbinimmediatelyorsomeofthefleascanclimbout. Beerisagreathairlightener.Ifyouareoutoflemonstrydippingyourhairinbeerbeforegoingoutside.Justdon'tforgettowashitoutafterwards.Milkisgreatforremovingdirtymarksespeciallyifitissometypeofink. Asyoucanseetherearemanyotherusesforeverydayfoodsaroundthehouse.Sonexttimebeforethrowingfoodawaythinkingitisofnousestopforamomentandthinkaboutalltheirusestalkedabouthere. 1Howmanywayswemakeusefruitaretalkedaboutinthepassage? A.3 B.4 C.5 D.6 2WhichoftheAllowingcanbeusedtolightenyourhair? A.Lemonsandbeer. B.Bananasandlemon. C.Orangesandbeer D.Milkandlemon. 3WhatdoestheunderlinedwordtheyinParagraphsreferto? A.Apples B.Tomatoes C.Applestomatoesandapaperbag D.Applesandtomatoes. 4What'sthewriterattitudetosurprisinguseofeverydayfood? A.Negative B.Positive C.Concerned D.Careful
下丘脑是人体生命活动调节的枢纽如图表示不同刺激引起下丘脑对内环境稳态的调节过程．回答问题 1人体在寒冷环境中激素填图中字母的分泌量明显增加细胞呼吸增强以增加产热量同时皮肤发生的生理反应是． 2人进食后血糖浓度升高刺激下丘脑的神经细胞引起的膜内电位变化是最终导致血液中激素D的含量选填“升高”或“降低”该激素的生理作用是． 3研究发现尼古丁能增加人体细胞对D的敏感性增强D对血糖的调节作用．为验证上述结论将实验鼠随机均分为AB两组每天分别注射一定量的尼古丁溶液生理盐水相同且适宜条件下饲养3周．然后给各鼠注射等量的葡萄糖溶液测定半小时后两组鼠血液中D浓度的变化．该实验中给小鼠注射葡萄糖的最终目的是实验后AB两组鼠血液中D浓度的大小关系是．若将实验中的“测定D浓度”改为“测定血糖浓度”实验过程需将“给各鼠注射等量的葡萄糖溶液”修改为．
Myelephantadventuresbeganin1984whenwithourone﹣year﹣olddaughtermyhusbandandIcrossedthejungleinajeepslickingbehindalorryforcomfortandcompany.Theelephantsstandinglikewatchersoneithersideoftheforesthighwayhadusprayingforoursafety.Oneelephantmadeloudnoiseandangrilypawed抓thegroundwarningusoff.Weracedawaybeforetheycouldattack. Itwaswisetokeepelephantsatadistance.Weheardstoriesoftouristswhosejeepswereoverturnedandacoupleofphotographerswerekilledbecausetheymovedtooclose.Elephantsaremisleadinganimals.Theygivepeopleanimpressionofbeingquietandkindsotouriststhinkit'ssafetopicnicinthejungle丛林.Yetangryelephantshaveknockedthemdowninsecondsbeforetheycouldtakeoff. Elephantsmightmakelifeunpredictableanddangerous.It'sdifficultforinexperiencedenvironmentaliststoevenbegintograspthisreality.I'veheardcitypeoplesayWehumansareencroaching侵害ontheirforests.Butwhat'sthesolution? Whenapoorfarmerborrowsheavilytoplantacrophe'lldoanythingtoprotectitHislifedependsonitElephantsruininganabout﹣to﹣be﹣harvestedcomfieldcannotexpecttobewelcomedlikespecialguests.Thebattlebetweenbeastandfarmerisviolent. Expertsareworkingonsolutionstohuman﹣elephantconflicts冲突.Somearesuretofailtoliketheplanstobuildelectricfencesaroundhumansettlements.Elephantsrapidlyfigurethemoutandcomeinaroundandoverthem. Therearemorequestionsthananswersforsure.ButasmyhusbandsaidMorepeopledieincaraccidentseverysingledayineverycityontheearth.Buttheywon'ttakecarsofftheroadswillthey?Soweneedtoseekpracticalwaysofpreventingelephantaccidents. 1Whatisthewriter'spurposeinwritingParagraph1? A.Totellreadersherfamily'sexperienceofelephantadventure. B.Toshowreaderselephantsareangryanddangerous C.Tointroducethetopicofthewholepassage. D.Todescribehowherfamilykeepawayfromelephants. 2Whydotouriststhinkitissafetopicnicinthejungle? A.Theythinkelephantsarequietandkind. B.Theyhaven'theardthestoriesofelephantkillingpeople. C.Theylikeelephantstoomuch. D.Theythinktheycanraceawayinseconds. 3Whatdocsapoorfarmerdotoprotecthiscrop? A.Welcomeelephantlikespecialguests. B.Fightwithelephantsforhisharvest. C.Stopplantingcrops. D.Dependonelephantsforhislife. 4Whatcanwelearnfromthelasttwoparagraphs? A.Itisagoodideatobuildelectricfencesaroundhumansettlements. B.Itisimpossibletofindasolutiontosettlehuman﹣elephantconflict. C.Weshouldfirstreducecaraccidentstopreventelephantaccidents. D.Itisourdulytoprotectelephantsratherthankillthem.
Wildlifehasbeengreatlythreatenedinthemodernage.Therearespecies物种thatare1everyday.Thewhite﹣napedcraneisatypicalexample.Soscientistsaretryingtheirbestto2thespeciesfromgoingoutofexistence. ChrisandTimworkatazoohelpingendangeredcraneswiththeir3.Emmaafemalecranehasbeenintheir4sinceshearrivedin2004. BornataninternationalcranefoundationEmmawas5byhumancaretakers.Thisledtoanunexpected6thoughshehadawonderfultimethere.Emmahad7takenherselfasacraneandbecomedeeplyattachedtohumans.She8tolivewithmalecranesandevenhada9forkillingsomeofthemwhichmadeit10forhertobecomeamother. 11thetwozookeepersdidn'twanttoseetheextinction灭绝ofthispreciousspecies.Withtheirpatienceandeffortstheysuccessfullydevelopeda12ofartificialbreeding人工繁殖andnaturalreproduction.This13Emmatogivebirthtofivebabycranes. Thetwokeepersareproudoftheirproductivework.Butbeforetheycanbe14moreeffortsmustbemadebecausethepopulationofthecraneinthewildisonthe15andmanyotherspeciesappearheadedtowardextinction.16noteveryonehasrealizedthatwildlifehasthoughtsfeelingsandmostimportantlyequalrightstosurvive. Howcanwe17theever﹣wideninggapthatseparatesusfromotheranimals?ChrisandTimofferedusthe18humanbeingstookitforgrantedthattheir19heldallthesolutionsbutmaybetheirheartscanbeabetter20. 1A.growing B.migrating C.competing D.disappearing 2A.ban B.save C.split D.remove 3A.abortion B.recreation C.reproduction D.administration 4A.care B.eye C.mind D.story 5A.found B.chosen C.raised D.seized 6A.bonus B.consequence C.victory D.sacrifice 7A.never B.always C.unluckily D.cheerfully 8A.liked B.refused C.decided D.hesitated 9A.gift B.skill C.concern D.reputation 10A.illegal B.inspiring C.important D.impossible 11A.Therefore B.Moreover C.However D.Instead 12A.combination B.collection C.strategy D.system 13A.forced B.forbade C.taught D.enabled 14A.defeated B.grateful C.assured D.tolerant 15A.list B.rise C.agenda D.decline 16A.Incontrast B.Afterall C.Bytheway D.Onthecontrary 17A.leave B.bridge C.open D.identify 18A.course B.excuse C.answer D.reward 19A.brains B.behaviors C.services D.projects 20A.guide B.treat C.example D.companion
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. Ihavereceivedandreadyourletterinwhichyoumentionthatyouwantedtoloseweightbydiet. Itisonlynaturallythatyounggirlsatyouragehopetolookbeautiful.Howeverinmyopinionhealthyismoreimportantthanbeauty.Forastudentstudyingisthefirstthingtoconsiderwhileappearanceissecond.Sodonotletothers'opinionstoaffectyournormallife.Thereforeifyoudowanttoloseweightitisagoodideatodoitbygettingmoreexerciseandchangingunhealthyeatinghabits.Themostimportantthingishowyoukeepahealthystateofmindasitwillhelpwithourstudiesandwillalsohelpyouovercomedifficultiesindieting. IhopemyadviceswillbehelpfultoyouandI'mlookingforwardtoyournextletter.
研究人员利用小鼠的单倍体ES细胞只有一个染色体组成功培育出转基因小鼠．其主要技术流程如图所示请分析回答下列问题 注ⅠⅡⅢⅣ代表四种限制酶．箭头指向的位置为限制酶的切割位置Ampr是氨芐青霉素抗性基因Neor是G418抗性基因． 1利用PCR技术可以扩增目的基因PCR反应体系中除含绶冲液模板DNAdNTP包含dATPdCTPdGTPdTTP引物以外还应含有引物应选用下图中的填图中标号． 2在基因工程操作步骤中过程①②称为．已知氨芐青霉素不能有效杀死小鼠细胞而一定浓度的G418能有效杀死不具有Neor的小鼠细胞．结合上图推测过程①选用的2种限制酶是选填图中的编号③处的培养液应添加填“氨芐青霉素”或“G418” 3细胞乙与类似图中桑椹胚需通过技术移入__小鼠子宫内继续发育进行该操作前需对受体小鼠进行处理．
小型犬浣熊为树栖动物属于食肉类动物也吃无花果和植物花粉等如图为小型犬浣熊种群相关曲线说法不正确的是
下列关于细胞增殖的叙述中正确的是
Attheageof14JamesHarrisonhadamajorchestoperationandherequired13units3.4gallonsofbloodafterwards.Theblooddonationssavedhislifeandhedecidedthatonceheturned18hewouldbegindonatingbloodasregularlyashecould. Morethan60yearsandalmost1200donationslaterHarrisonwhosebloodcontainsanantibody抗体thathassavedthelivesof2.4millionbabiesfrommiscarriages流产retiredasablooddonoronMay11.Harrison'sbloodisvaluablebecausehenaturallyproducesRh﹣negativebloodwhichcontainsRh﹣positiveantibodies.Hisbloodhasbeenusedtocreateanti﹣DinAustraliasince1967. Everybottleofanti﹣DevermadeinAustraliahasJamesinitRobynBarlowtheRhprogramdirectortoldtheSydneyMorningHerald.It'sanamazingthing.Hehassavedmillionsofbabies.Icryjustthinkingaboutit.SincethenHarrisonhasdonatedbetween500and800millilitersofbloodalmosteveryweek.He'smade1162donationsfromhisrightarmand10fromhisleft. I'dkeepgoingiftheyletmeHarrisontoldtheHerald.Hisdoctorssaiditwastimetostopthedonations﹣andtheycertainlydon'ttakethemlightly.Theyhadalreadyextendedtheagelimitforblooddonationsforhimandthey'recuttinghimoffnowtoprotecthishealth.Hemadehisfinaldonationsurroundedbysomeofthemothersandbabieswhohisbloodhelpedsave. Harrison'sretirementisablowtotheRhtreatmentprograminAustralia.Only160donorssupporttheprogramandfindingnewdonorshasproventobedifficult.ButHarrison'sretirementfromgivingblooddoesn'tmeanhe'scompletelyoutofthegame.ScientistsarecollectingandcataloginghisDNAtocreatealibraryofantibodiesandwhitebloodcellsthatcouldbethefutureoftheanti﹣DprograminAustralia. 1WhatdoweknowaboutJamesHarrison? A.Hesaved2.4millionpoorpeople. B.Heistoretireasablooddonor. C.Heisaverygratefulblooddonor. D.Hedonatesbloodnearlyeveryday. 2Whatistheauthor'spurposeofwritingParagraph4? A.TostateHarrison'sdecisiontocontinuedonatingblood. B.TodescribehowHarrison'sdonationscometoanend. C.TointroducesomebabiessavedbyHarrison'sblood. D.TopraiseHarrisonforhiscooperationwiththedoctors. 3WhatcanweinferfromthepassageaboutHarrison? A.AfterhisretirementtheRhprogramwillfail. B.Newdonorsareeasytofindinashorttime. C.HecontinuestocontributetotheRhprogram. D.HisDNAiskeptinalibraryforfuturestudy. 4Whichofthefollowingcanbethebesttitleforthetext? A.AUniqueManwithaRareBloodType B.TheBloodSavingMillionsofBabies C.ASpecialBloodproducer D.TheManwiththeGoldenArm
假定你是李华你的朋友Peter想了解你校于五月举办的中国传统文化艺术节.请你给Peter写封回信内容包括 1.举办艺术节的目的 2.介绍你最喜欢的一个艺术节活动 3.邀请Peter参加并告之艺术节活动的时间. 注意1.词数100左右 2.可以适当增加细节以使行文连贯.
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