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已知某传染性疾病的病原体为RNA病毒，该病毒表面的P蛋白为主要抗原．根据图1回答问题： （1）过程①指的是 ．从过程①到提取分离出P基因的具体操作中，源自不同生物的DNA之所以能够重组的原因是...
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高三下学期生物《》真题及答案
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人类在预防与诊疗传染性疾病过程中经常使用疫苗和抗体已知某传染性疾病的病原体为RNA病毒该病毒表面的A
人类在预防与诊疗传染性疾病过程中经常使用疫苗和抗体已知某传染性疾病的病原体为RNA病毒该病毒表面的A
人类在预防与诊疗传染性疾病过程中经常使用疫苗和抗体已知某传染性疾病的病原体为RNA病毒该病毒表面的A
人类在预防与诊疗传染性疾病过程中经常使用疫苗和抗体已知某传染性疾病的病原体为RNA病毒该病毒表面的A
人类在预防与诊疗传染性疾病过程中经常使用疫苗和抗体已知某传染性疾病的病原体为RNA病毒该病毒表面的A
人类在预防与诊疗传染性疾病的过程中经常使用疫苗和抗体已知某传染性疾病的病原体为RNA病毒该病毒表面的
人类在预防与诊疗传染性疾病过程中经常使用疫苗和抗体已知某传染性疾病的病原体为RNA病毒该病毒表面的A
人类在预防与诊疗传染性疾病过程中经常使用疫苗和抗体已知某传染性疾病的病原体为RNA病毒该病毒表面的A
6.人类在预防与诊疗传染性疾病过程中经常使用疫苗和抗体已知某传染性疾病的病原体为RNA病毒该病毒表面
人类在预防与诊疗传染性疾病过程中经常使用疫苗和抗体已知某传染性疾病的病原体为RNA病毒该病毒表面的A
人类在预防与诊疗传染性疾病过程中经常使用疫苗和抗体已知某传染性疾病的病原体为RNA病毒该病毒表面的A
人类在预防与诊疗传染性疾病的过程中经常使用疫苗和抗体已知某传染性疾病的病原体为RNA病毒该病毒表面的
人类在预防与诊疗传染性疾病过程中经常使用疫苗和抗体已知某传染性疾病的病原体为RNA病毒该病毒表面的A
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人类在预防与诊疗传染性疾病过程中经常使用疫苗和抗体已知某传染性疾病的病原体为RNA病毒该病毒表面的A
人类在预防与诊疗传染性疾病过程中经常使用疫苗和抗体已知某传染性疾病的病原体为RNA病毒该病毒表面的A
人类在预防与诊疗传染性疾病的过程中经常使用疫苗和抗体已知某传染性疾病的病原体为RNA病毒该病毒表面的
人类在预防与诊疗传染性疾病过程中经常使用疫苗和抗体已知某传染性疾病的病原体为RNA病毒该病毒表面的A
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人类在预防与诊疗传染性疾病的过程中经常使用疫苗和抗体已知某传染性疾病的病原体为RNA病毒该病毒表面的
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WhenOliverSacks82diedonAug30athishomeinNewYorkCitytheworldwassaddenedbythelossofabrilliantneurologist神经学者andatrulybeautifulmind. London﹣bornSackswasmostfamousforhiswriting.AForbesobituary讣告callshimoneofthegreatestwritersofscienceofthepast50years.Maybethegreatest. Inhisbest﹣selling1985bookTheManWhoMistookHisWifeforaHatSacksdescribedamanwhocouldnottellthedifferencebetweenhiswife'sfaceandhishatbecausehisbrainhaddifficultytellingwhathesaw. In2006Discovermagazinerankeditamongthe25greatestsciencebooksofalltimedeclaringLotsofneuroscientistsnowlookingintothemysteriesofthehumanbraincite列举thisbookastheirgreatestinspiration/ His1973bookAwakeningsisaboutagroupofpatientswhowerefrozeninadecades﹣longsleepuntilSackstriedanewtreatment.Thebookledtoa1990movieinwhichSackswasactedbyRobinWilliams.Itwasnominated提名forthreeAcademyAwards. AnotherbookAnAnthropologistonMarspublishedin1995describedcaseslikethatofapainterwholosthiscolorvisioninacaraccidentbutfoundnewcreativepowerinblack﹣and﹣whiteimages.Sacksalsowrotethestoryofa50﹣year﹣oldmanwhosuddenlyregainedsightafternearlyalifetimeofblindness.Theexperiencewasadisaster.Theman'sbraincouldnotmakesenseofthevisualworld.Afterafullandrichlifeasablindpersonhebecameaverydisabledandmiserable悲惨的sightedmanSackswrote.Whenhewentblindagainhewasrathergladofit. DespitethedramaandunusualstoriesSacks'bookswerenotmeanttobefreakshows.OliverSackshumanizesillness…hewritesofbodyandmindandfromeveryoneofhiscasestudiesthereshowsafeelingofrespectforthepatientandfortheillnessRoaldHoffmannaNobelPrize﹣winningchemistsaidin2001. WhenSacksreceivedtheLewisThomasPrizeforsciencewritingin2002thecitation荣誉状declareduSackspressesustofollowhimintounknownareasofhumanexperienceandforcesustorealizeoncetherethatwearefacingonlyourselves. 1ThefollowingstatementsarewrongEXCEPT. A.TheManWhoMistookHisWifeforaHatwasrankedamongthe25greatestsciencebooks B.AnthropologistonMarsledtoamovieinwhichSackswasactedbyRobinWilliams C.Sacksrecordedamanwhoregainedsightafteralifetimeblindness D.Awakeningsisoftencitedbyneuroscientiststoprovethemysteryofhumanbrain 2WhywasSackscalledoneofthegreatestwritersofscienceoverthepast50years? A.HewasborninLondonandmostfamousforhiswriting. B.Hewroteaseriesofbookstheinfluenceofwhichwasgreat. C.Hewasabrilliantneurologistandhadatrulybeautifulmind. D.HereceivedtheLewisThomasPrizeforsciencewritingin2002. 3Whichofthefollowingistrueaccordingtothepassage? A.OliverSackslosthiscolorvisioninacaraccident. B.OliverSackswontheNobelPrizein2002. C.Awakeningswasfilmedin1973inwhichRobinWilliamsactedasSacks. D.OliverSacksshowedrespectforhumanityinhisbooks. 4Thepassageismainlyabout. A.theawardsOliverSacks'won B.thelifeexperiencesofOliverSacks C.theinfluenceofOliverSacks'works D.thereasonswhyOliverSackssucceeded
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Lifegettingyoudown?Learntobounceback Thatwhichdoesnotkillusmakesusstronger.Nietzschesaid.Thereareanumberofwaysthatcangetusthroughtoughtimeshelpustobouncebackandmakeushappier.1. Findsomethingyoucancontrol. 2Buttakingsmallpositivestepsinanyareaofourlifecanhavearippleeffectenablingustomoveforwardintheproblemarea. 3. Asaspecieswetendtofocusonwhat'swrongratherthanwhat'sright.Butwecanbenefitalotfrompayingattentiontowhat'sgoingright.Psychologistshaveshownconsciouslyfocusingonthesegoodthingshelpstoincreaseourexperienceofpositiveemotions. Checkyourthinking. 4LeadingpsychologistMartinSeligmanfoundthatthewayweinterpretthecausesofeverydaysetbackscanhaveasignificantimpactonourabilitytocopeandourphysicalhealth.Healsoshowedwecanlearnmoreresilient有弹性的thinkingstyles. Distractyourself. Whenwearetrappedinaproblemitishardtothinkcreativelyaboutwaystodealwithit.Itoftenhelpstotaketimeoutfromthethingsyouareworryingabout.5Notonlydoesthisgiveusabreakfromwhatwe'redoingandourworriesit'salsogreatforourminds. A.Alwaysdosomethingthatisright. B.It'struethattherearelotsofthingswecan'tcontrol. C.Aneffectivewayoftakingtimeoutisexercise. D.Nexttimeyouarefeelingstressedorstuckgivethematry. E.Focusonwhat'sright. F.Nexttimesomethinggoeswrongforyoupauseforamoment. G.Thewaywethinkcandestroyourownresilience.
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ThehugeT﹣rex霸王龙bendsoveralargetriceratops三角龙lyingonhissidebelow.WithitsmouthopenwidetheT﹣rexlooksreadytokillthetriceratopswithafinalbitetothetriceratops'sneck.ThedisplaywillbefoundattheNationalMuseumofNaturalHistory. ThemuseumhassoughtahugeT﹣rexskeleton骨架formanyyears.Beforeitusedamodelofone.ButmuseumdirectorKirkJohnsonsaysthatwasnevergoodenough.It'sbeenkindofdeeplyembarrassingtobethenationalmuseumandNOThaveaT﹣rexhesaid.TheT﹣rexdisplayisnowthecenterpieceofthemuseum'snewestshowwhichwillbeavailabletothepubliconJuly15. ThatT﹣rexnamedSuewasfoundinSouthDakota.Officialsatthemuseumbuiltaspecialareafortheskeleton.ItincludesagiftstoreofallthingsrelatedtoSue.SueevenhasherownTwitteraccountandamediapresentationofherlifestory. InmoderntimesmovieslikeJurassicPark侏罗纪公园havehelpedgrowdinosaurinterestforanewgenerationofyoungfans.ButsuchmoviesdescribetheT﹣rexesasmostlyhugestupidanddangerousanimalswhicharetruethreatinthefighting:quickintelligentandaggressivehuntersingroups. 1WhatisdescribedinParagraph1? A.HowaT﹣rexhuntsinthewild. B.HowaT﹣rexwillbedisplayedinamuseum. C.HowaT﹣rexispaintedinapicture. D.HowaT﹣rexisfilmedinamovie. 2WhatdoweknowabouttheT﹣rexskeleton? A.ItwasfoundinAustralia. B.Ithasbeenopentothepublic. C.Itisvaluedbythemuseum. D.Itisstillamodelone. 3Whatcanbeinferredfromthelastparagraph? A.Moviesaboutdinosaursshouldbereduced. B.Theyounggenerationdislikesdinosaurs. C.TheT﹣rexisakindofhugestupiddinosaur. D.Somemoviesaremisleadinginaway.
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MentionthewordsuperheroandtheimagesthatcometomindareoffictionalcharacterslikeSpidermanWonderWomanorBatman.HoweverphotographerJoshRossihasusedhiscameratoshowtheworld'srealsuperheroes﹣youngchildrenwhoarebattlingseverediseasesanddisabilities. Theeventleadingtothecreativeprojectbeganin2016whenRossifulfilledhisthenthree﹣year﹣olddaughter'sdreamofbecomingWonderWoman.ThankstothehandmadecostumeandRossi'simpressivePhotoshopskillsthephotoshootinstantlybecameahit. SinceitwasWonderWomanthatbroughtabouttheideaRossidecidedtofocusonthesuperheroesthatwillappearalongsideherintheupcomingmovieJusticeLeague.Tomakethephotoshootmoremeaningfultothekidshematchedeachchildwithasuperherowithwhomtheyhadthemostincommon. Thefirstmemberofthereal﹣lifeJusticeLeaguewasKaydenKinckle.Thefive﹣year﹣oldusesprosthetics假肢towalkbecausebothhislegshadtobecutoffduetoaborndisorder.ToRossiKayden'sperfectsuperherowasCyborgwhowasahealthyboybeforeaterribleaccidentlefthiminjuredforcinghisfathertokeephimalivewithroboticparts. TeaganPettitwasbornwithonlyhalfaheartandhasalreadygonethroughthreeopen﹣heartsurgeries.AccordingtoRossithenine﹣year﹣oldfitsthebillforSupermanbecausetheybothhaveaweakheart.ThefictionalsuperherogrowsweakwhennearKryptonite氪whileTeagen'shalfheartistooweaktocontrolhisbodytemperature.ThephotographersaysSupermanandTeaganbothhaveheartsofsteel! 1WhatledRossitobeginhisheartwarmingproject? A.Hewasabigfanofsuperheroes. B.HephotographedhisdaughterasWonderWoman. C.Hewasaskedbymanyparentstofilmtheirchildren. D.Hewantedtoadvertisetheupcomingmovie. 2KaydenissimilartoaccordingtoRossi. A.Cyborg. B.WonderWoman. C.Teagan. D.Batman. 3Whatdoestheunderlinedphrasefitsthebillforinthelastparagraphmean? A.loves. B.matches. C.orders. D.watches. 4Whatcanbeasuitabletitleforthetext? A.ASuperheroPhotographer B.FictionalSuperheroes C.FansofSuperheroes D.Real﹣lifeSuperheroes
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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.错误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Λ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. Iwasgoinghomebybikeinacoldafternoonwhenmybikebrokedown.AsIwaswonderinghowtodoanoldmancameover.Heofferedtohelpmeandsoonmybikerepaired.Ithankedhimbutaskedhowtorewardhim.Sheshookhisheadandthentoldmeastoryabouthowaboyhadhelpedhimtwoyearbefore.Hisstorymovedmedeep.Ilookedatthemanwithmyeyesfillingwithtears.Ineverthoughthecouldkeepsuchalittleincidentinthemindforyears.OnlythendoIbegintobelievethatonegoodturndeservesanother.
阅读下面短文根据所给情节进行续写使之构成一个完整的故事. SaraSavickremembersonespecialEasterwhenshewasnineyearsold.Herparentsgaveherababyducklinginayellowbasket. MomsaidlaterthatsheboughtthelittleduckbecauseshefeltsorryforitrecalledSara.ThepeopleatthepetstorecoloredthefeatherspinkforEaster.SaranamedtheduckPinky. Sara'smotherreallydidn'tthinkthebabyduckwouldsurviveverylong.ButtohersurprisePinkygrewandgotstrongerandstronger.Soonthelittleducklingwasahealthyhungryduckwithwhitefeathers. WefedPinkyoatmealcookedanduncookedandsmallpiecesofvegetablessaidSara.PinkylivedinsidethehousewithSaraandherfamily.ShespeciallyfanciedtakingbathswithSara.EveryonetreatedPinkyasafamilymember. Butjustwheneverythingappearedtobeperfectthenightofthetalkcame.Sara'sMomandDadsatherdownexplainingthatthebestthingforPinkywastoliveanormalducklifewithotherducks.Itwasnotnaturalforduckstoliveindoorswithafamilyherfathertoldher.HeaddedPinkyneededtoswiminpondsanddoallthesamethingsthatducksinthewilddo. Sarastartedtocryknowingwhatwasgoingtohappen.Sara'sparentsdecidedtotakePinkytoaparkwhichwastwomilesaway.Therewasapondwithalotofotherducks.PinkywouldhavethechancetoliveanaturallifeandSaracouldstillvisither. ThebigdaycameSaraandherparentsputPinkyinaboxanddrovetothepark.SarasaidthatPinkydidnotlookhappy;maybePinkywasconvincedthatshewasahumannotaduck. 注意: 1.所续写短文的词数应为l50左右; 2.至少使用5个短文中标有下划线的关键词语; 3.续写部分分为两段每段的开头语已为你写好; 4.续写完成后请用下划线标出你所使用的关键词语. Paragraph1 EveryonewassadwhentheyleftPinkyatthepondevenSara'sfather. Paragraph2 ThenextmorningwhenlookingoutofthekitchenwindowSaracouldn'tbelievehereyes!
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Ifyouwearglasseschancesareyouaresmarter.ResearchpublishedinthefamousBritishjournalNatureCommunicationshasfoundthatpeoplewhodisplayedhigherlevelsofintelligencewerealmost30percentmorelikelytowearglasses. Thescientistsstudiedthegenesofthousandsofpeoplebetweentheagesof16and102.Thestudyshowedintelligencecanbeconnectedtophysicalcharacteristics.Onecharacteristicwaseyesight.In3outof10peoplewhoweremoreintelligenttherewasahigherchancetheyneedglasses.Scientistsalsosaidbeingsmarterhasotherbenefits.Itisconnectedtobetterhealth. Itisimportanttoremembertheseareconnectionswhicharenotprovencauses.Scientistscallthiscorrelation.Justbecausesomethingisconnectedtosomethingelsedoesnotmeanoneofthosethingscausedtheother.Andit'sworthnotingthatwhatconstitutes构成intelligenceissubjectiveandcanbedifficultifnotimpossibletomeasure. Forgetgenesthough.Plentyofproofshowswearingglassesmakespeoplethinkyouaremoreintelligentevenifyoudonotneedglasses.Anumberofstudieshavefoundpeoplewhowearglassesareseenassmarterhard﹣workingandhonest.Manylawyersusethisideatohelpwintheircases.LawyerHarveySlovisexplainedthis.Glassessoftentheirappearancehesaid.Sometimestherehasbeenahugeamountofproofshowingthatpeoplehewasdefendingbrokethelaw.Hehadthemwearglassesandtheyweren'tfoundguilty. GlassesarealsousedtoshowsomeoneisintelligentinmoviesandonTVIdeasaboutpeoplewhowearglasseshavebeguntoshift.Peoplewhodonotneedglassessometimeswearthemforfashiononly.Theywanttolookworldlyorcool.Butnoteveryoneisimpressedbythisideathough.GQmagazinesaidpeoplewhowearglassesforfashionaretryingtoohardtolooksmartandhip时髦的.Howeverthathasn'tstoppedmanycelebrities名人fromhappilywearingglasseseveniftheydonotneedthem.JustenBieberisjustonehigh﹣profilefanoffashionglasses. 1Whatdoesthenewstudyshow? A.Peoplewearingglassesaresmarter. B.Peoplewearingglassesarehealthier. C.Wearingglassescanmakepeoplecleverer. D.WearingglassesisassociatedwithhigherIQ. 2WhatdoestheunderlinedwordcorrelationinParagraph3mean? A.Shift. B.Link. C.Proof. D.Consequence. 3Whydosomelawyersasktheirclientstowearglassesincourt? A.Becauseitcancreateamoralimage. B.Becauseitcanmisleadthewitnesses. C.Becauseitcanhighlightclients'qualities. D.Becauseitcanprovetheclients'innocence. 4Whatisthegeneralattitudetothosewhowearglassesforfashion? A.Positive. B.Negative. C.Mixed. D.Indifferent.
人体细胞的生活环境称为内环境内环境是指
ForalongtimeIthoughtapresentandagiftwerenodifferent.Igrewupinahouseholdwherepresents1specialoccasionssaytherewerealwayspresentsforChristmasandourbirthdays. SowhenImarriedGarywhodidnotgivepresentsona2basisIhadtomakeanadjustment.Garydidnotwhollyavoidgift﹣givingthough.3noticinghowmanyhoursIspendonthe4hebroughthomeashoulderpad垫肩forthetelephonereceiver.Butmostlyhe5holidaysletaloneshopforearringsto6tomeshowinghisaffection. Itriedtochangehim7.IboughtbooksforhisbirthdaysandknittedhimhatsandsweatersforChristmas.8IbegantotellhimwhatIwantedgiving9instructionsbutgotnowhere. Lastyearwhenthesnowstorm10ourtownandhewasonbusinessIusedhispresent﹣roadscraper铲土机to11bothourdriveandourneighbor'sthinkinghow12earringswouldhavebeen.GaryhadwiselychosennotthethingI13butthethingthatheknewIwouldneed. I14begantounderstandthedifferencebetweenapresentandagift.Apresentisjustathing.Butagiftisbroaderandoftencannotbe15.Itisasmallactofkindnessthe16tobendtoanother'sneedsthesacrificeoftimeandeffort.17isagift.Anyexpressionofitfreelygivenisan18fromtheheartthatisimmeasurablybetterthanapresent. MyinsistenceonpresentsmusthaveseemedtoGaryalackof19.forthegiftshehadbeengivingallalongbutheneverstoppedgivingthem. GarywillbehomethisChristmasbutIdon't20apresent.Ialreadyhavethegreatestgift. 1A.marked B.involved C.expressed D.displayed 2A.daily B.rare C.temporary D.regular 3A.Therefore B.Once C.Then D.Besides 4A.gardening B.cooking C.telephone D.Internet 5A.missed B.hated C.abandoned D.ignored 6A.serve B.refer C.present D.relate 7A.bytradition B.byforce C.byexample D.bychance 8A.Yet B.Even C.Thus D.Still 9A.useful B.simple C.specific D.interesting 10A.struck B.disappeared C.melted D.passed 11A.clearup B.tearup C.buildup D.speedup 12A.priceless B.useless C.weightless D.colorless 13A.valued B.prepared C.preserved D.desired 14A.eventually B.definitely C.simply D.totally 15A.obtained B.discovered C.measured D.observed 16A.happiness B.willingness C.wisdom D.freedom 17A.Love B.Passion C.Insistence D.Motivation 18A.sharing B.offering C.following D.experiencing 19A.desire B.concern C.preparation D.appreciation 20A.purchase B.order C.expect D.evaluate
TopMusicFestivals Festivalseasonisjustkickingoffandthereisalottolookforwardtointheupcomingmonths. FireflyMusicFestival Manypeoplehaven'tthoughtofgoingtoDelawareforasummervacationbutmid﹣Juneisagreattimetoplanthistripifyoulovemusic.Headlinersforthisyear'sshowareTheWeekendMuseTwenty﹣OnePilotsChancetheRapperandBobDylan. Date:June15﹣182017 Location:DoverDelawareUSA MusicType:Rock Price:＄79﹣＄2499 RoskildeFestival ThisDenmarkmusicfestivalhasbeenalocaltraditionsince1971.Therewillbeninestagesforthisyear'seventstohostgroupsliketheFooFightersBlink182andTheLumineers.What'sinterestingaboutthisfestivalisthatinadditiontothebigheadlinersyoucanalsogettoknowup﹣and﹣comingregionalartistsfromDenmarkSwedenandNorway. Date:June24﹣July12017 Location:RoskildeDenmark MusicType:Rockemergingregionalartists Price:DKK995﹣DKK1995around＄144﹣＄289 SecretSolstice WithlongdarkandcoldwintersnobodycelebratessummerquitelikeIcelanders.ToseeforyourselfplanatriptoIcelandthisJunetocheckouttheSecretSolsticefestival.NotonlywillyouenjoyseeingbandslikeRadioheadandAfrikaBambaataabutyoucanalsoexperiencetheother﹣worldlylandscapesandgeothermal地热的springsnearbyaswell. Date:June15﹣182017 Location:ReykjavikIceland MusicType:EclecticIndie Price:€149﹣€1599around＄160﹣＄1725 MontrealJazzFestival AlljazzloversoweittothemselvestocheckouttheMontrealJazzFestivalatleastonceinalifetime.ThiseventbringstogethersomeofthebestnamesinjazzmusicaswellasdiverseR&Bfunk骤停打击乐andsoulartists. Date:June28﹣July82017 Location:MontrealQuebecCanada MusicType:JazzR&BSoulFunk Price:＄27.25﹣＄210.25 1Whatiscommontothemusicfestivalsmentionedinthetext? A.TheyareheldinEurope. B.Theirmusictypesarerockandhip﹣hop. C.Theyaregivenintheopenair. D.Theytakeplaceinsummer. 2WhatcanweinferaboutDelawarefromthetext? A.Itisthecityofmusic. B.Itisnotasummerdestination. C.ItisthehomeofBobDylan. D.Itisacityofhighexpense. 3WhatisthepurposeofIcelanderstoholdtheSecretSolsticefestival? A.Towelcomesummer. B.Tomemorizethepastwinter. C.Tocelebratethecomingofspring. D.Toadvisethelocalbeautifullandscapes.
WhenMr.WangaChinesecalligraphy书法masterandpainterinvitedmetohisstudioIgotextremely1delight.Whatatreat! Hisapartmentdoublesashisstudio2hecreatescalligraphyworksandpaintingsaswell.Thelivingroomhasalongdeskwithacollectionof3brushofvaryingsizestwobiginkpotsandapairofpaperweights. Mr.Wangshowedhislatestworkascroll卷轴oftheGreatWallatBadaling4winditswayalongthesteephillswhich5recognizeasaWorldHeritageSitebytheUnitedNationsin1987.Thebeautyoftheseven﹣meter﹣longscrollpaintingwasbeyond6describe. Hetoldmesomeonehadofferedalargeamountofmoneyforthepaintingbutherefused7partwithitashewantedtodonatetotheNationalMuseum. AfterthatMr.WanginvitedmetopracticecalligraphyanditwasthefirsttimethatIhad8trueexperiencedthebeautyoftheline.Itwasthen9InoticedMr.Wangappearedtohaveahealthybody.Iwonderedifpracticingcalligraphykepthimsofit.Whetherthatistrueonethingiscertain;asMr.Wangput10Onlydoonethinganddoitwell﹣﹣﹣that'sthesecrettosuccess
Earlierthismonthastudyshowedthatbeescanteachthemselvestoplayfootball.Theycanlearnbywatchingandratherthancopywhattheyhaveseenchangeittomakeitbetter.Beesalsohaveaclevertrickforhelpingtheirfriendsfindlunch.Newresearchshowsthatbeesleavesmellylittlefootprintsonflowersthathelpthemknowwhatflowerstheyandtheirfamilymembershaverecentlyvisited. ThediscoverywasmadebyscientistsfromUniversityofBristolwhoreportthesesmellyfootprintshelpbeesdistinguishbetweentheirownscent气味thescentofarelativeandthescentofastranger.Andbyusingthisabilitybeescanimprovetheirsuccessatfindinggoodsourcesofafoodandavoidflowersthathavealreadybeenvisitedandminedofnutrients. TheBristolteamperformedthreeseparateexperimentswithbumblebees大黄蜂inwhichtheywererepeatedlyexposedtorewardingandunrewardingflowersatthesametimethathadfootprintsfromdifferentbeesattachedtothem.Eachflowertypeeithercarriedscent﹣marksfrombumblebeesofdifferingrelatednessorwereunmarked.Themarkswereeitherthebee'sownmarkssistersfromtheirnestorstrangersfromanothernest. Thestudyshowsthatnotonlycanbumblebeestellthemarksoftheirownnestmatesfromstrangersbuttheycanalsodiscriminatebetweenthesmelloftheirownfootprintsandthoseoftheirnestmatesisterswhichcouldhelpthemtorememberwhichflowerstheyhavevisitedrecently.Butitdoesn'texplainhowtheyusethatinthewild.Theymaydetectthefootprintsoftheirfriendsandkeepmovingonsincethatflowermaybetappedout.Ortheymaysmellabitoffamiliarfootsmellanddiveinseeingitasamarkerthatnectar花蜜ispresent. 1WhatcanweinferaboutbeesinParagraph1? A.Theyaresmartlearners. B.Theyhavestrongfamilyties. C.Theyenjoysmellyfootprints. D.Theylikeplayingtricksonothers. 2WhatdoesthisabilityinParagraph2referto? A.Findinggoodsourcesoffood. B.Followingotherbees'footprints. C.Tellingthesmellsoffootprintsapart. D.Recognizingdifferenttypesofflowers. 3Whatcanwelearnfromthefindingsoftheexperiments? A.It'seasierforBumblebeestorecognizetheirfriends. B.It'sunclearhowbumblebeesusetheirabilityinthewild. C.Bumblebees'memorycanbesignificantlyimproved. D.Bumblebees'footprintscangivethemasenseofidentity. 4Whatisthemainideaofthetext? A.Differentflowersattractdifferentbees. B.Beeshaveanewtrickofsurvivinginthewild. C.Bumblebeesmaysmellfootprintstokeeptrackoffood. D.Bumblebeescangiveoffuniquescentstoattractothers.
FourTipsforHighSchoolGraduates Overthree﹣millionhighschoolstudentsaregraduatingthisspringintheUnitedStates.Manyofthemwillheadtouniversityinthefall.Thetransition过渡fromhighschooltocollegeisamajoroneandsuccessfuladjustmenttocollegehaslifelonginfluences. Maybeyouareabouttomakethistransitionyourselforhavechildrenwhoareabouttoleavethenest.1Ifyouknowsomeonewhoismakingthistransitionorknowparentsguidingtheirsoon﹣to﹣beadultkidsthroughthistimepleasetakeamomenttosharethiscollectionofresearch﹣basedtipswiththem. Beopentomakingnewfriendsassoonasyousetfootoncampus.Evenduringorientation迎新会!2Yoursuccessincollegedependsinpartonsurroundingyourselfwithotherswhocansupportyouandhelpyouhavefun. 3Successfuladjustmentisaboutreachingoutforhelpwhenyouneedit.Thismeanstryingtofindtheanswersonyourownfirstbutthencontactingthosewhocanhelpyouwhenyoucan't.Thatiswhattheyaretherefor! Leanonyourfamily.Familysupportcangiveyoucomfortwhenclassesgethardoryouarestressedaboutfinals.4Strongsupportfromfamilyislinkedtolowerlonelinessanddepressionduringthefirstyearofcollegeandhigheracademicadjustmentincludingmotivationandconcentration. Beconfident.Feelinganxietyaboutcommunicatingwithfellowsprofessorsandspeakingupinclassisassociatedwithloweradaptationduringthetransitiontocollege.Oneofthebestwaystoincreaseyourcommunicationconfidenceistopractice!5 A.Thislistisforyou. B.Themoreyouspeakupinclasstheeasieritbecomes. C.Don'tbeafraidtotalktoyourprofessorsorteachingassistants. D.Joiningclubsisalsolinkedtofeelingsofbelongingatcollege. E.Yourprofessorsandteachingassistantswanttoseeyousucceedintheirclasses. F.Almosteveryoneisinthesameboatasyouarehopingtomakefriendsquickly. G.Familymemberscangiveyouadviceandhelpyousolveproblemsifyouneedhelp.
农民用一定浓度的植物激素类似物除去麦田中的杂草一般使用的是
TheCreatorofMiddleEarth JohnRonaldReuelTolkienbetterknownasJ.R.R.Tolkienwasbornin1892inSouthAfrica.Hisparentshadmovedtherelookingfor1betterjobforhisfather.Threeyears2latehismothertookhimonatriptoEnglandtovisitfamily. Whiletheywereawaytheyreceivedterriblenewsthathisfatherhaddied. 3growupwithoutafathermusthavebeendifficultforTolkien.Worsestillwhenhewasonlytwelveyearsoldhismotheralsopassedaway.Asachildhehadagreatpassionforlanguageandin1908hewenttoOxfordUniversity4studylanguagesandliterature.In1915hejoinedthearmyandfoughtinthebattleagainsttheGermans.Butsoonhebecametooilltofightandreturned5Englandthefollowingyear.Hedidn'thavea6satisfychildhoodhimselfsoaroundin1933storyofahobbit霍比特人hespentmuchtimetellinghischildrenfantasy7calledBilbo.Hefirstputitinwritingin19368turnedouttobeasurprisinghit. Thepublisheraskedhimtowriteanother.Hedidsoandin1948publishedTheLordoftheRingswhich9publishinthreevolumesbetween1954and1955. Tolkien10ageeighty﹣onediedin1973.
已知某种水果果皮红色H对黄色h为显性果肉酸味R对甜昧r为显性这两对相对性状的遗传遵循基因自由组合定律．现有基因型为HhRrhhrr的两个个体杂交其子代的表现型比例是
如图为中心法则图解其中表示翻译过程的是
不科学的生活方式使得有“富贵病”之称的糖尿病患者日益增多．当糖尿病病情严重时通常需要注射的药物是
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