阅读理解题主要考查考生对书面语篇的整体领悟能力和接受及处理具体信息的能力。试题的取材，密切联系当前我国和世界经济、科技等方面的变化，有关数据的来源真实可信。因此科普知识类文章是每年的必考题。分析历年的科普类文章我们不难发现以下特点：1．文章逻辑性强，条理清楚，语法结构简单，用语通俗。2．文章内容注重科技领域的新发现。内容新颖，从而使文章显得陌生，内容抽象复杂。3．命题方面注意对具体细节的准确理解和以之为依据的推理判断。4．以人们的日常行为或饮食健康入手，探讨利弊，诠释过程，阐述概念。ScienceDaily(June18,2012)Anexperimentalvaccine(疫苗)developedtopreventoutbreaksofMarburg(马尔堡病毒)hemorrhagic(出血的)fevercontinuestoshowpromiseinmonkeysasanemergencytreatmentforaccidentalexposurestothevirusthatcausesthedisease.ThereisnolicensedtreatmentforMarburginfection，whichhasahighfatalityrate.Inastudyofrhesusmacaques(恒河猴)，5of6monkeyssurvivedafataldoseofMarburgviruswhentreated24hoursafterinfection，and2of6survivedwhentreated48hoursafterinfection.BecauserhesusmacaquestypicallydieofMarburginfectionfasterthanhumans，thepost­exposuretreatmentwindowmightbeextendedevenfurtherinhumans，thestudyauthorssay.Thestudy，overseenbyascientificteamfromtheNationalInstitutesofHealthandthreeothergroupswithexpertiseinviralhemorrhagicfevers，waspostedonlinebythejournalEmergingInfectiousDiseases.“Developingsafe，effective，andrapidlyeffectivepost­exposuretreatmentsforfiloviruses(丝状病毒)isanimportantscientificpriorityforourInstitute，”saysAnthonyS．Fauci，M.D.，directorofNIH'sNationalInstituteofAllergyandInfectiousDiseases(NIAID)．“Thevaccineusedinthisstudyisamongseveralnovelapproachestotreatingfilovirusesthatshowgreatpotential.”ThefactthatthreeoftherhesusmacaquesinthecurrentstudyshowedevidenceofMarburgvirusinperiodicbloodtests，butlaterclearedthevirusfromtheirsystemsandsurvived，isparticularlysatisfyingtoDr.FeldmannandTomGeisbert，Ph.D.，ofBostonUniversity.Inaddition,14daysafterinfection，alloftherhesusmacaquesthatsurvivedshowedmoderatetohighlevelsofantibodies(抗体)againstMarburgvirus.Thescientistsviewthisasproofthatthevaccineworkedashoped.1．Whatwouldbethebesttitleofthispassage?A．EvidenceofMarburgVirusinPeriodicBloodTestsB．SeveralNovelApproachestoTreatingFilovirusesC．ALethalDoseofMarburgVirusinHumansD．ExperimentalMarburgVaccinePreventsDiseaseTwoDaysAfterInfecti