首页
试卷库
试题库
当前位置：
X题卡
>
所有题目
>
题目详情
假设你是新华中学的学生会__.近来,随着网络的普及,学生的汉字书写能力降低.为了保护传统民族文化﹣﹣汉字,校学生会提出倡议.请你根据以下内容提示,写一封倡议书. 内容要点： 1.少上网,多读书,...
查看本题答案
包含此试题的试卷
高二下学期英语《》真题及答案
点击查看
你可能感兴趣的试题
假如你是新华中学学生会__李华学校安排你给给即将到你校任教的外籍教师Peter推荐一名学生助手ass
假设你是新华中学的学生会__近来随着网络的普及学生的汉字书写能力降低为了保护传统民族文化——汉字校学
华中师范大学学生会始于年公立华中大学学生会
假设你是红星中学学生会__李华你校交换生Jim在给你的email中提到他对学生会组织的活动感兴趣并希
中美中学生交流项目安排一批美国中学生来华一周体验中国文化现网上挑选适合住宿的家庭homestayfa
假设你是南昌十九中学生会__李华你校将于3月17日接待来自于德国某中学的学生访问团你受学校委托负责安
某大学学生会换届选举张华和其他四个竞选者报名竞选学生会__一职其他四个竞选者都没有同时具备张华所有的
其他四个竞选者都有一些缺点
张华是最优秀的学生，具备当选学生会__的条件
其他四个竞选者都有不如张华的地方
张华具有其他四个竞选者的所有优点
第二节写作满分30分中美中学生交流项目安排一批美国中学生来华一周体验中国文化现网上挑选适合住宿的家庭
假设你是红星中学学生会__李华你校交换生Jim在给你的email中提到他对学生会组织的活动感兴趣并希
你是学生会__有个同学生病了要你尽快筹集一笔钱你怎么办
假设你是红星中学学生会__李华你校交换生Jim在给你的email中提到他对学生会组织的活动感兴趣并希
最近你当选为学校学生会__有学生向你反映学校计算机太少不够用你怎样解决这个问题?
假设你是新华中学的学生会__近来随着网络的普及学生的汉字书写能力降低为了保护传统民族文化——汉字校学
假设你是新华中学的学生李华你校计划于下周六上午主办题为MyDream的英语演讲比赛你准备参加请你根据
学生志愿者纷纷退出志愿活动学生会__也不愿再组织学生参加你该如何跟学生会__沟通
假设你是新华中学的学生会__近来随着网络的普及学生的汉字书写能力降低为了保护传统民族文化---汉字校
书面表达满分15分国外某网站website将举办新一轮网上讲座活动正面向全球中学生征集话题topic
学生志愿者纷纷退出志愿活动学生会__也不愿再组织学生参加你该如何跟学生会__沟通?
@B.
@D.
假设你是新华中学高二3班学生李华请你以MyDreamingSeniorYear理想高三为题写一篇10
假设你是新华中学的学生会__李华你校打算邀请某大学知名学者王教授来学校参加毕业典礼并做演讲来鼓励学生
热门试题
更多
如图所示家系中的遗传病是由位于两对常染色休上的等位人基因控制的．当两种显性基因同时存在时个体才不会患病．若图中Ⅱ﹣5和Ⅱ﹣6子代中患病纯合子的概率为据此分析下列判断正确的是
EditorsnoteWhetherpeopleareoverworkedrecentlymadeheadlineswhenseveralinternetcompanybossessaidtheonlywayforemployeestoachievesuccessisthroughharderworkandlongerhours.Forumreaderssharetheiropinions. Cecilia Workingtoomanyhoursonlymeansyouarctime﹣wastingandinefficient低效的.Thismeansittakesyoulongertoproducesomethingthansomeoneelse. Agoodmanagerknowshowtoencouragehisemployeestoworklotheirfullabilityinsteadofexpectingthemtoworklateeveniftheydon'thavesomethingtodo.Peoplewhostayintheirofficeuntillatehatetheirjobsanditaffectstheirperformanceaswellasotherwaysoftheirlife. Rosemary Overworkingisjustmodemslavery.Inmanycountriesoverworkingwouldbeattackedbecauseitshowspoorworkperformanceandthebosswouldpreferyouworkinabetterway7hoursandthengobackhomethan8hourswithpoorperformance. NervyNowadaysit'shardforayoungpersontobuildagoodfutureforpressuresareonhisorhershouldershousingchildrenparentsthemselvesetc.Buteveryonemustkeepworkinghardtohavethemonthewaytothegoodfuturewhichisnotcertain.What'ssureisthatifyou'relazyanddon'tworkhardnogoodfuturewillcome. Sunny Idon'tthinkanyonewantstoworkovertimeThefactisthecompetitionissoextremeifyoudon'tworkhardsomeonewilleasilyandwillinglyreplaceyouespeciallyintheITindustry.Employeesaretoldtheyneedtoworklongerhoursortheywon'tgetraised.Itistimetogiveupthecultureofoverworking. 1WhatwillhappenifCeciliaisforcedtooverwork? A.Shewillperformtoherfullability. B.Shewillfeelunhappytodoit. C.Shewillasktheemployertodoit. D.Shewillencourageotherworkerstodoit. 2Whoseideaisalittlebitdifferentfromtheothers? A.Cecilia. B.Rosemary. C.Nervy D.Sunny. 3Inwhichpartofthenewspapercanyoufindthepassage? A.Culture. B.Business. C.Lifestyle. D.Opinion.
已知数列{an}满足a1＝1若则数列{an}的通项an＝
一幼儿园有10个班每个班有30名同学每个班同学随机编号为01﹣30为了了解他们家长对幼儿园管理方面的要求对每班第19号同学的家长进行调查这里运用的抽样方法是
我国魏晋时期的数学家刘徽创立了用圆内接正多边形面积无限逼近圆面积的方法称为“割圆术”为圆周率的研究提供了科学的方法．在半径为1的圆内任取一点则该点取自圆内接正十二边形外的概率为
Havingtroubledistinguishingonefurrypandafromanother?Afacialrecognitionappwillmakeiteasyforyou.TheappisdevelopedbytheChinaConservationandResearchCenterforGiantPandasalongwithresearchersinSingaporeNanyangTechnologicalUniversityandSichuanNormalUniversity. Theimageanalysisresearchbeganin2017.Adatabasenowcontainsabout120000imagesand10000videoclipsofgiantpandas.Closeto10000pandapictureshavebeenanalyzedandmarked.Usingthedatabaseresearchersareabletocarryoutautomaticfacialrecognitiononpandafacestotelloneanimalfromanotherthecentersaid. It'snotjustagimmick噱头fortouriststhough.PandaresearchershopealgorithmsandAItechnologywillhelpthemanalyzedataonpandasbothincaptivity圈养andthewild.Theappanddatabasewillhelpusgathermorepreciseandwell﹣roundeddataonthepopulationdistributionagesgenderratiobirthanddeathsofwildpandaswholiveindeepmountainsandarehardtotracksaidChenPengaresearcherwiththebasewhoco﹣authoredapaperonGiantPandaFaceRecognitionUsingSmallDatabase.ItwilldefinitelyhelpusimproveefficiencyandeffectivenessinconservationandmanagementoftheanimalsChensaid. Chinahascarriedoutfourscientificfieldresearchprojectofgiantpandasinthewild.Thegiantpandawasscientificallydiscovered150yearsagoandnamedinthecityofYa'anSichuan.Itremainsoneoftheworld'smostendangeredspecies.Thenumberofcaptivepandaswas548globallyasofNovemberlastyear.Fewerthan2000pandasliveinthewildmostlyintheprovincesofSichuanandShaanxi. 1Howmanypandashavebeencarefullyrecordedaccordingtothepassage? A.120000. B.10000. C.2000. D.548. 2Withthehelpoftheappanddatabasewecangetinformationaboutpandasexpect. A.thepopulation B.theirages C.thebirthanddeathsofwildpandas D.theweight 3Whatcanwelearnfromthepassage? A.TheAItechnologymakesnodifferencetotheprotectionofpandas. B.Atpresenttheappisnotpracticalfortourists. C.Morepandasliveinthewildratherthanincaptivity. D.Pandasarethemostendangeredspeciesaroundtheworld.
Notre﹣DamedeParisacathedralchurchinParisisthemostfamousoftheGothiccathedralsoftheMiddleAges.FortheFrenchitrepresentssomethingimmortalever﹣presentandunchanginglikeamountain.BuiltoveralmosttwocenturiestheNotre﹣DameisasPresidentEmmanuelMacronsaidwheretheFrenchlivedalltheirgreatmoments.SoldiersprayedherebeforeleavingfortheCrusadesNapoleonBonapartewascrownedhereitsurvivedtheFrenchRevolutiontwoWorldWarsandtheNazioccupation.Itiswheremenbendtheirkneestoprofessloveandthousandsoftouriststakephotoseveryday. Afirewhosecausewasnotidentifiedyetengulfed吞没onApril15ththecathedral'supperstructure.Morethan400firefighterstookpartinthe15﹣hourbattletocontroltheblaze火苗thattriggeredsorrowovertheglobe.Theextentofthedamageisstillunknownbutthefiredestroyedmuchofthegothiccathedral'swood﹣timberedroofandspire塔尖.ThecathedralwillcertainlyberestoredtheFrenchgovernmentpromisesbutthesightofflamesbringingdownthespiremovedtheworldinamannerfarexceedingitsreligioussignificance. FrenchCultureMinisterFranckRiesteronThursdaysaidthegovernmentwoulddrawalltheconsequencesfromthehugeflamesthatdestroyedthecenturies﹣oldNotreDameCathedraladdingmeasurestoprotectthenationalheritagewereonthetable.StafffromthefiredepartmentthecultureministryandthecitytownhallrushedtotheCathedralwhenthefirestartedtoprotectthemainartworksthatwereinside.TheartworkswhichincluderelicssuchastheChrist'scrownofthornsandFrenchkingSaint﹣Louis's13thcenturytunicwerefirstmovedtothecitytownhallandwillnowbetransferredtothenearbyLouvreMuseum.theministertoldLeParisiannewspaperinaninterviewwithoutgivingdetailsonthepossiblemeasures. 1WhatcanwelearnabouttheNotre﹣DamedeParis? A.Itisthemostwell﹣knowncathedral. B.MostoftheFrenchthinklittleofit. C.ItwasbuiltbyNapoleonBonaparte. D.It'sstillinexistenceaftertwoWorldWars. 2TheunderlinedwordtriggeredinParagraph2canbereplacedby. A.destroyed. B.avoided. C.caused. D.prevented 3WhatistrueabouttheCathedralintheaccident? A.Onlythespirewasbroughtdownbytheflames. B.Itwascompletelyburntinthefire. C.Thegildedcrownofthornsinitwasgoneforever. D.ThecauseoftheaccidenttotheCathedralwasstillunknown. 4AccordingtoFranckRiesterwhathasalreadydonebythegovernment? A.Rebuildthecathedral. B.Rescuetheartworksinsidethecathedral. C.TransfertherelicstothenearbyLouvreMuseum. D.Releasethecauseofthefiretothepublic.
AsInternetusersbecomemoredependentontheInternettostoreinformationarepeoplerememberingless?Ifyouknowyourcomputerwillsaveinformationwhystoreitinyourownpersonalmemoryyourbrain?ExpertsarewonderingiftheInternetischangingwhatwerememberandhow. InarecentstudyProfessorBetsySparrowconductedsomeexperiments.SheandherresearchteamwantedtoknowhowtheInternetischangingmemory.Inthefirstexperimenttheygavepeople40unimportantfactstotypeintoacomputer.Thefirstgroupofpeopleunderstoodthatthecomputerwouldsavetheinformation.Thesecondgroupunderstoodthatthecomputerwouldnotsaveit.Laterthesecondgrouprememberedtheinformationbetter.Peopleinthefirstgroupknewtheycouldfindtheinformationagainsotheydidnottrytorememberit. Inanotherexperimenttheresearchersgavepeoplefactstorememberandtoldthemwheretofindtheinformationonthecomputer.Theinformationwasinaspecificcomputerfolder文件夹.Surprisinglypeoplelaterrememberedthefolderlocation位置betterthanthefacts.WhenpeopleusetheInternettheydonotremembertheinformation.Rathertheyrememberhowtofindit.Thisiscalledtransactivememory交互记忆. AccordingtoSparrowwearenotbecomingpeoplewithpoormemoriesasaresultoftheInternet.Insteadcomputerusersaredevelopingstrongertransactivememoriesthatispeoplearelearninghowtoorganizehugequantitiesofinformationsothattheyareabletoaccessitatalaterdate.Thisdoesn'tmeanwearebecomingeithermoreorlessintelligentbutthereisnodoubtthatthewayweusememoryischanging. 1Thepassagebeginswithtwoquestionsto. A.introducethemaintopic B.showtheauthor'sattitude C.describehowtousetheInternet D.explainhowtostoreinformation 2Whatcanwelearnaboutthefirstexperiment? A.TheSparrow'steamtypedtheinformationintoacomputer. B.Thetwogroupsrememberedtheinformationequallywell. C.Thefirstgroupdidnottrytoremembertheinformation. D.Thesecondgroupdidnotunderstandtheinformation. 3Intransactivememorypeople. A.keeptheinformationinmind B.changethequantityofinformation C.organizeinformationlikeacomputer D.rememberhowtofindtheinformation 4WhatistheeffectoftheInternetaccordingtoSparrow'sresearch? A.Weareusingmemorydifferently. B.Wearebecomingmoreintelligent. C.Wehavepoorermemoriesthanbefore. D.Weneedabetterwaytoaccessinformation.
OneSaturdayafternoonmymotherwasdrivinghome.Onthehalfwayafter1hercreditcardtobuysomethingatthestorenearthegasstationsheputherwalletonthetopofhercarjustforamomentto2myphonecall.Andthenobviouslyshe3anddroveoff.Whenarrivinghomesherealizedthatandthoughtthatthe4ofgettingitagainwassmall. Shewasso5surprisedwhenshefounda6onherdoorfromapersonwhosaidheandhisfriendfoundherwalletafewhoursearlier.PatrickandCatherinesawthewalletinthemiddleoftheroadafew7fromthegasstation.Theystoppedtheircarto8.Itwasfilledwithallthethingsonenaturallykeptinawalletincludingsome9andothercashhowevernophonenumber.10thistheymanagedtogetan11frommymother'sdrivinglicenceandwithouthesitationtheydecidedtodrivetoourhometo12it. Wheymymotherwenttogetherwallet.shewasso13andgrateful.She14togivethemsomemoneyasan15ofgratitudebuttheyrefusedsayingthattheywerejustgladto16mymotherhelp. Theywerenaturally17andtheyhadfirm18intheGoldenRuleaswell.Theydrovetoourhomebecausetheyrealizedtheunpleasantandupsetexperiencetheexperiencethelossofawalletandallitscontentscould19.Ithinktheywerereally20andhelpful. 1A.pullingout B.standingfor C.payingfor D.sortingout 2A.make B.answer C.hear D.send 3A.sank B.explored C.forgot D.inspected 4A.amount B.expectation C.thought D.chance 5A.curiously B.joyfully C.willingly D.strangely 6A.sign B.signal C.note D.postcard 7A.seconds B.hours C.squares D.blocks 8A.pickitup B.lookitup C.takeitout D.putitout 9A.pictures B.envelopes C.bills D.medals 10A.Insteadof B.Becauseof C.Despite D.Without 11A.number B.photograph C.address D.distance 12A.get B.check C.exchange D.return 13A.hopeless B.relieved C.fortunate D.warm﹣hearted 14A.planned B.advised C.demanded D.instructed 15A.feeling B.mood C.present D.expression 16A.offer B.share C.trust D.seek 17A.honest B.selfish C.logical D.creative 18A.courage B.faith C.support D.devotion 19A.remove B.deserve C.value D.cause 20A.humorous B.independent C.polite D.considerate
已知等差数列{an}的前n项和Sn若S4＝26Sn＝260Sn﹣4＝126n＞4则n＝
假设你是李华你们学校的民乐团将于近期进行演出你的美国外交Terry对中国民乐很感兴趣请你写封邮件邀请他观看演出.内容包括 1.演出的时间地点 2.演出的曲目数量级时长 3.乐团的简要介绍 注意 1.词数100左右 2.可以适当增加细节以使行文连贯. 参考词汇folkorchestra民乐团symphony曲目
松果体可通过褪黑素的周期性分泌向中枢神经系统发放“时间信号”从而影响机体时间生物效应如睡眠与觉醒．如图表示光暗信号通过视网膜→神经中枢→松果体途径调控人体睡眠过程的示意图．请回答 1当神经末梢有神经冲动传来时突触前膜内的受到刺激释放去甲肾上腺素引起松果体细胞分泌褪黑素．褪黑素分泌的调节方式是与褪黑素调节睡眠相比该调节方式的反应速度． 2下丘脑除与生物节律的控制有关外还有等神经中枢． 3研究发现褪黑素还能促进BT淋巴细胞的增殖．B细胞在填场所中成熟并可增殖分化成．由此判断等病症患者不适合使用外源褪黑索．
TheSouthernOceaniswellknownforitsstormswhichcansinkshipsandcausefloodingondistantislands.Nowanewstudysuggeststhebiggestwavestherealreadytheworld'slargest﹣aregettingbiggerthankstofasterwinds. Forthepast33yearsglobalsatelliteshavebeencollectingdataonoceanwaves﹣andthewindsthatdrivethem.Butexplainingthedataisdifficultdifferentsatellitescangivedifferentwindspeeds. ToreducethosedifferencesIanYoungandAugustine'sRibaldattheUniversityofMelbourneinAustraliacomparedinformationfromdifferentsatellitesandcorrectedtheirdataagainstanindependentdatasetcollectedbyaglobalnetworkofbuoys浮标floatingintheocean.Whentheyweredoneatrendstoodoutsince1985oceanwindspeedsinmostoftheworldhaveincreasedbetween1centimeterand2centimeterspersecondperyearleadingtoincreasesinwaveheightinmanyplaces. IntheSouthernOceanthetrendisparticularlystrong.Forexamplealthoughwindspeedstherehaveincreasedby2centimeterspersecondeachyearthespeedofthetop10%fastestwindshasincreasedby5centimeterspersecondperyear.Andalthoughaverage平均的waveheightstherehaveincreasedbyjust0.3centimetersperyearthetop10%highesthasgrownbyanaverageof1centimeterperyearagrowthof30centimeterssince1985theyreporttodayinScience. YoungandRibaldhavedoneagoodjobofcross﹣checkinganddouble﹣checkingfromthethreedifferenttypesofsatelliteinstrumentsaysOleJohanattheUniversityofBergeninNorway.ButheaddsitmightbeoptimistictothinkthatthedatanowcontainnoerrorsConfirmingtheireIlikelyrequiremoreworkhebelieves. 1Whatcausedtheworld'slargestwavesintheSouthernOcean? A.Thesatellites B.Thestorms C.Thewinds D.Thefloods 2WhichofthefollowingcanbestexplaintrendunderlinedinParagraph3? A.deepthought B.novelmethod C.specialgoal D.generaldirection 3WhatcanbelearnedfromthestudyintheSouthernOcean? A.Waveheightshaverisenby2centimeterssince1985. B.Windsspeedshavegrownby30centimeterseachyear. C.Thetopwaveheightshaveslowlyfallensince1985. D.Thetopfastestwindspeedshavebeenonherise. 4WhatdocsOleJohan'saltitudetowardsthenewstudy? A.Hethinkshighlyofit. B.Hetakesnointerestinit. C.Heshowsconcernaboutit. D.Hesaysnotoit.
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错误.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. 修改在错的词下面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. DuringtheNationalDayholidayIpaidavisitmygrandmainthecountryside.IthasbeenalmosttwoyearssinceIlastsawher.Inmymemorymygrandmawasahardworkingbutstrongwomanfullofenergy.Whenevershesawmeshealwayshuggedmedeep.ButwhenIgaveherahugthistimeIfoundthatshewasmuchshortandthinnerthanbefore.Herbackwasbecomebentandherhairsturnedwhite.Butluckilyshewasstillhealth.Shecouldlaughlikeachild.Tomyhappyshecouldcooksomedeliciousfoodforme.Ilovemygrandma.Iknowhewillalwaysbetherehelpingmeandlovingme.
小鼠的弯曲尾B对正常尾b显性．让正常尾雌鼠与弯曲尾雄鼠杂交子一代弯曲尾♀正常尾♂＝11．遗传学家将一个本身不控制具体性状的DNA片段“M”导入到子一代弯曲尾雌鼠的体细胞中通过DNA重组和克隆技术获得一只转基因正常尾小鼠已知“M”和B基因同时存在时表现为正常尾b基因的表达不受“M”的影响小鼠的受精卵中Bb基因都不存在时将导致胚胎致死．请回答 1写出正常尾雌鼠与弯曲尾雄鼠杂交实验的遗传图解．． 2遗传学家认为“M”插入到小鼠染色体上的位置有4种可能如图．为确定“M”具体的插入位置进行了相应的杂交实验．不考虑交叉互换 实验方案让该转基因正常尾小鼠与非转基因正常尾雄鼠杂交统计子代的表现型种类及比例．结果与结论 ①若子代则“M”的插入位置属于第1种可能性 ②若子代则“M”的插入位置属于第2种可能性 ③若子代则“M”的插入位置属于第3种可能性 ④若子代则“M”的插入位置属于第4种可能性．
高三学生甲和乙近五次月考数学成绩单位分的茎叶图如图则下列说法错误的是
Goodtimemanagementallowsanindividualtocompletemoreinashinerperiodoflimeandleadslocareersuccess.1. Makeaplan Thebestwaytoachievesuccessistomakeaplan.Thisstartsasalistofallthetasksthatareimportantforachievingyourgoals.2it'snotasgoodasyouthinkitis. Avoiddistractions分心 Takealongandhardlookatyourrelationshipwithe﹣mailsandsocialmedia.Althoughtheyareimportanttoeverydaycommunicationtheymayneedmuchmoreattentionthantheydeserve3asyouworkonataskthatrequiresyourfullattention. Learntosayno Manybusinessleadersputalotoftheirsuccessdowntosimplysayingno.Thatistheyputtheireffortsinthefewareasthatreallymatterandhavethecouragetosaynotoeverythingelse. Giveyourselfabreak Takingbreaksisgoodforyourbrain.Don'tbehardonyourselfyouwillactuallyperformbetterifyoutakebreaksanddevelopalifeoutsidestudy.4whenyouarenotworking. Theydonotneedtobeanswereduntilthenextworkingday.Theworldwillnotendifyoudelayopeningsomee﹣mails. Updated更新yourplan Yourplanlistwillneedtoberegularlyupdatedparticularlywhenthingsarenotgoingwell.5theycanbringtheirexperienceandwisdomtotheproblem. A.Trytoavoidlookingatyourworke﹣mails B.Itslikelythatyouneedagoodrestsometimes C.Considershuttingthemoffcompletely D.Hereissomeadviceonhowtobettermanageyourtime E.Makingaplanisimportantforyoutoachieveyourgoals F.Workwithyouradviserstoformupdatedlistoftasks G.Writethemdownanddon'tjustrelyonyourmemory
Cloningisanapproachto1makeanexactcopyofanotheranimalorplantwhichinourdailylifehappensquiteoften.Ithastwomajoruses.2isthatgardenerstakecuttingsfromgrowingplantstomakenewones.Theotheristhatitis3valueformedicalresearchonanimals.Theprocessofcloningisadifficulttask4undertake. ThefirstsuccessfulcloneDollythesheep5arouseworldwide6curiousandconcernbecauseofitsscientificandethicalimplications影响.ShewasthefirstmammaltobeclonedfromadultDNA7takefromanadultcell.Dolly'sappearanceraisedastormof8objectandhadagreateffect9themediaandpublicimagination.Differentpeoplehavedifferentopinionsonit.Howeverscientistsstillwonder10cloningwillhelporharmusandwhereitisleadingus.
设则下列不等式恒成立的是
截至2017年9月30日我国累计报告艾滋病病例264302例防艾迫在眉睫．科学工作者从HIV感染自愈者体内采取相应免疫细胞使之与骨髓瘤细胞结合生产HIV的抗体具体过程见图．请回答相关问题 1HIV自愈者免疫细胞是指甲乙丙中只含杂交瘤细胞的是②过程表示将乙细胞接种到多孔培养板上其目的是筛选获得具有特点的抗HIV抗体的杂交瘤细胞． 2HIV病毒专一侵染T淋巴细胞的原因是． 3转基因技术被运用到了HIV的疫苗的研制工作中该技术操作的关键步骤是为使目的基因在受体中高效表达需要把目的基因片段插入到表达载体的之间． 4用DNA﹣RNA分子杂交技术确定目的基因是否完成了转录翻译． 5科学工作者发现一种D蛋白其31号位的色氨酸替换成酪氨酸后就能与HIV表面的糖蛋白结合从而使HIV病毒失去侵染T细胞的能力若利用该蛋白防治艾滋病用到的现代生物技术有．
破伤风由破伤风杆菌引起窄而深的皮肤伤口如刺伤易营造厌氧环境有利于破伤风杆菌生长并分泌外毒素对机体造成伤害．回答下列问题 1人体皮肤形成伤口说明免疫系统保卫人体的第道防线受损．侵入机体的破伤风外毒素被吞噬细胞摄取处理后传递给T细胞进而刺激B细胞增殖分化在此过程中引起B细胞增殖分化的两个条件分别是和． 2破伤风是可以通过注射破伤风疫苗预防的．与未接种破伤风疫苗的人比较破伤风外毒素侵入已经接种破伤风疫苗的人体后会更快地被清除掉其主要原因是． 3对于没有接种过破伤风疫苗的伤者应尽早皮下注射破伤风抗毒血清．破伤风抗毒血清中起关键作用的物质是抗外毒素球蛋白其作用是．
执行如下的程序框图则输出的k的值为．
Itwasanotherfrustratingday.Icamehomefromschoolchangedmyclothesandgotreadyforwork.Iworkedatalocalrestaurantintown. Iwenttoworkfeelingdown.It'sthesamethingoverandoveragaindealingwithcustomerswhocomplainabouttheirfood﹣﹣﹣howthepieceofpiethattheyareservedistoobigortoosmall.Threeelderlyladieswalkedinandsatbythewindow.Iwasworkingsince500p.m.andwewerequitebusy.ButtheseelderlywomenwerewatchingmeasIwasworkingreallyhardtomakesureeverytablewascleanandreadyforthenextcustomers. WhentheywerefinishedwiththeirmealsItooktheirplatesbacktothekitchen.TheytalkedtomeforawhileaboutschoolhowIwasdoingwhichgradeIwasinandwhatIplannedtodointhefuture. AstheywereleavingtheywalkedpastmeandoneofthemsaidtomeinaconfidentandgentlevoiceYouaregoingplaces.TheylefttherestaurantandIwasprettymuchinawe.Ihadtearsinmyeyesbecausetheygavemeareasontobelieveinmyself.Theypickedmyspiritupfrombeingdownandgavemeareasontokeeponworkinghardandtogiveitmyall. 1Fromthepassagewelearnthattheauthor. A.hadaparttimejob B.workedintherestaurantallday C.lovedhisjobatfirst D.didverywellinhislessons 2TheunderlinedsentenceYouaregoingplaces.inthetextprobablymeans. A.You'regoingonatrip. B.Youshouldgotoabetterplace. C.You'llbesuccessful D.You'reintherightplace. 3Theauthorfeltsadbecause. A.hedidn'twanttoworkthere B.itwasdifficulttomakethecustomershappy C.hehadtodothesamethingagainandagain D.theworkwastoohardforateenager 4Thepassagetellsusthat. A.encouragementcanbeimportantforyoursuccess B.everyoneshouldtreatelderpeoplegently C.peopledoingallkindsofjobsshouldberespected D.studentsshouldmakemoneytosupportthemselves
RecentlyIhavebeenamazedatthevideos1filmbyLisawhoisthedaughterofLandLina73﹣year﹣oldChinesewoman.TheycomefromGuangdong. NowLisaiiworkinginNewYork.Hermother2start…Slaywithherthreeyearsago.Lanlikes3traditionChinesedishesandenjoyscookingthem.butwithlime4goby.shebecomesolderandolder5shedoesn'tpassthemevertothenextgenerationcertaindisheswilljustbegone.6aresult.LisahasagoodideathatshecanfilmsomevideosashermotherCakesOneofThevideosin7LandexplainsTherecipe食谱inTalismansthedialectleavesagreat8impressonme. SheisfamousonIntegralAlthoughshecan'tunderstandwhy.Lan9considerasanonlinemotherfigureandcookingteachersinceLisapostedthevideosorttheInternet. Whenweliveinourhomecountryallthefoodthatweloveis10easytofindthatweneverlearnhowtomakeit.Theminutewemovewemovewewishwerememberedhowourmadeit.
Smilingisagreatwaytomakeyourselfstandoutwhilehelpingyourbodytofunctionbetter.Itisjustonefunwaytolivelongerreadabouttheothersandtryasmanyasyoucan.1 1.Smilingmakesusattractive 2Thereisanattractionfactor.Wewanttoknowasmilingpersonandfigureoutwhatissogood.Frownsandsorrowsallpushpeopleaway﹣﹣butasmiledrawsthemin.Whensomeoneissmilingtheylightenuptheroomchangethemoodsofothersandmakethingshappier.Smilealotandyouwilldrawpeopletoyou. 2.3 Stresscanreallyshowupinourfaceswhilesmilinghelpstopreventusfromlookingtiredworndownandoverwhelmed.Whenyouarestresseditisofgreatsignificancetotaketimetoputonasmilewhichcantrickthebodyintohelpingyouchangeyourmood.Thestressshouldbereducedandyou'llbebetterabletotakeaction. 3.SmilingLowersYourBloodPressure Whenyousmilethereisameasurablereductioninyourbloodpressure.4 Sitforafewminutestakeareading.Thensmileforaminuteandtakeanotherreadingwhilestillsmiling.Doyounoticeadifference? 4.SmilingMakesYouSeemSuccessful Smilingpeopleappearmoreconfidentaremorelikelytobepromotedandmorelikelytobeapproached.5 Nexttimeyouarefeelingdowntryputtingonasmile.There'sagoodchanceyourmoodwillchangeforthebetter. A.Themusclesweusetosmileliftthefacemakingapersonappearyounger. B.SmilingRelievesStress C.Herearesomereasonstokeepsmilinginyourdailylife. D.Giveitatryifyouhaveabloodpressuremonitorathome. E.Putonasmileatmeetingsandappointmentsandpeoplewillreacttoyoudifferently. F.WhenwesmileourbodyissendingtherestofusamessagethatLifeisGood! G.Wearedrawntopeoplewhosmile.
下列与神经调节有关的叙述不正确的是
埃博拉病毒EBO呈纤维状EBO衣壳外有包膜包膜上有5种蛋白棘突VP系列蛋白和GP蛋白其中GP蛋白最为关键能被宿主细胞强烈识别．请回答下列问题 1要获得编码GP蛋白抗原的基因疫苗首先要提取出病原体的RNA并利用RNA经合成DNA构建cDNA文库．cDNA文库中的基因选填“可以”“不可以”“部分”进行物种间的基因交流． 2为了从牛分泌的乳汁中提取GP蛋白需将GP蛋白基因通过方法导入牛受精卵中．在基因导入牛受体细胞前基因的首段必须含有使其仅能在牛的乳腺细胞中特异性表达的驱动转录过程．转基因牛是否培育成功可以通过技术从分子水平上进行检测． 3以GP蛋白作为疫苗比利用毒性减弱的埃博拉病毒作疫苗更安全其原因是． 4科研人员利用经EBO免疫后小鼠的与小鼠的骨髓瘤细胞进行融合以形成杂交瘤细胞培养后可以获得纯净的单一品种抗体其特点是可以用此抗体与药物制成“生物导弹”抗击EBO．
在锐角△ABC中角ABC的对边分别为abc其外接圆半径为R满足3R2＝a2+c2﹣2accosB角B的平分线交AC于点D且BD＝1则＝．
下列关于酶及其实验的叙述正确的是
研究人员对河北省某地的森林/草原过渡地带的鸟类进行调查获取了某些数据．请结合所学知识回答下列问题． 1调查鸟类的丰富度和相互之间的关系属于填“种群”或“群落”或“生态系统”水平的研究范畴．调査结果显示森林的鸟类有68种灌木的鸟类有38种草原的鸟类有25种分析其原因主要是森林复杂的结构为鸟类的生存提供了更加多样的食物和避免了生活习性相近的鸟类之间过分激烈的． 2调査表明森林中各种鸟类的种群密度也比较稳定这从一个侧面反映出森林具有较强的． 3某个食虫鸟种群的能量流动关系如下表所示单位×102J/m2•a． 该食虫鸟种群用于生长发育繁殖的能量为该种群与其捕食者之间的能量传递效率约为．
热门题库
更多
高三上学期英语
高二下学期英语
教案备课库
高三下学期英语
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
国际法
教案备课库
教案备课库
教案备课库
教案备课库
维修电工
教案备课库
湘公网安备 43130202000226号