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阅读理解（共20小题，每小题2分，满分40分）阅读下面的短文，从每题所给的四个选项(A、B、C、D)中，选出最佳选项。APleasebeadvisedthatNairobilikeanyotherlargecityhasasecurityandcrimeproblem.However,ifyouobservethefollowingsimpleguidelinesyouwillstayandhaveatrouble—freeseminar（研讨会）:1.Donotwearamoneybelt.Thismakesyouainstanttarget.2.Gamerasofallkindsareafavouritewithsnatchers.FeelfreetousethemwithintheStareheCampusandthehotelgroundsbutnotinthestreets.3.Ladieshandbagsarealsoaregularsnatch.Avoidcarryingone,andifyoumust,bealertandholdontoittightly.4.Jewelleryandevenglasseswithvaluableframesarealsooftentargeted.Bearthisinmind.5.Wheninavehiclekeepthedoorsalwayslocked,andthewindowsonlyslightlyopen—especiallyattrafficlights,junctionsandinslowmovingtraffic.6.Bewareofstreetchildren,theirbeggingoftenquicklytransformsintosomethingmoreunpleasant.7.Staywiththemainpartyallthetime,andavoidwanderingoffonyourown.8.Finally,thebestdefenceistobealertatalltimesandconsciousofyourenvironment.Shouldyouhaveanyproblem,queryorneedhelpatanyhourofthedayornightcallanyofthefollowingandtheywilldotheirbestforyou:56.Thisselectionmustbedeliveredby.OFFICEFLXEDHOMEFIXEDMobilePhone1KENEDYHONGO763856/76122176318207337612942FREDOKONO76122176498807336044903EDWINOTIENO761221761642/763011072701279A.theNairobecitygovernmentB.thepoliceoftheNairobeAirportC.theorganizeroftheseminarD.KennedyHongo,adetective57.Afterreadingthisnotice,visitorstoNairobemightgainanimpressionthat.A.FredOkonoandhisfellowworkmatesareverykindandhelpfulB.NairobeisalargecitywhichisverydevelopedC.thecrimeproblemisveryseriousinthecityofNairobeD.theyshouldnothavepaidavisittoNairobe,andshouldbuyaticketbackimmediately58.Thenoticetellsusthat.A.somethingunpleasantcouldhappentoyouifyouuseacameraduringtheseminarB.ladiesmustnotwearhandbagoranyjewelleryC.inthehotelsofNairobe,itmightbedangeroustostayinasingleroomD.everythingwillbeOKifyoualwayswatchoutandareclearaboutthesurroundingsBWithonlyabout1,000pandasleftintheworld,Chinaisdesperatelytryingtoclone（克隆）theanimalandsavetheendangeredspecies（物种）.That’samovesimilartowhataTexasA&MUniversityresearchershavebeenundertakingforthepastfiveyearsinaprojectcalled“Noah’sArk.Noah’sArkisaimedatcollectingeggs,embryos（胚胎）,semenandDNAofendangeredanimalsandstoringtheminliquidnitrogen.Ifcertainspeciesshouldbecomeextinct,Dr.DuaneKraemer,aprofessorinTexasA&M’sCollegeofVeterinaryMedicine,saystherewouldbeenoughofthebasicbuildingblockstoreintroducethespeciesinthefuture.Itisestimatedthatasmanyas2,000speciesofmammals,birdsreptileswillbecomeextinctinover100years.Thepanda,nativeonlytoChina,isindangerofbecomingextinctinthenext25years.Thisweek,ChinesescientistssaidtheygrewanembryobyintroducingcellsfromadeadfemalepandaintotheeggcellsofaJapanesewhiterabbit.Theyarenowtryingtoimplanttheembryointoahostanimal.Theentireprocedurecouldtakefromthreetofiveyearstocomplete.“Thenucleartransfer（核子移植）ofonespeciestoanotherisnoteasy,andthelackofavailable(capableofbeingused)pandaeggscouldbeamajorproblem,”Kraemerbelieves.“Theywillprobablyhavetodoseveralhundredtransferstoresultinonepregnancy(havingababy).Ittakesalongtimeandit’sdifficult,butthiscouldbegroundbreakingscienceifitworks.Theyarecertainlynotputtinganylivepandasatrisk,soitisworththeeffort,”addsKraemer,whoitoneoftheleadersoftheProjectatTexasA&M,thefirst-everattemptatcloningadog.“Theyaretryingtodosomethingthat’sneverbeendone,andthisisverysimilartoourworkinNoah’sArk.We’rebothtryingtosaveanimalsthatfaceextinciton.Icertainlyappreciatetheireffortandthere’salotwecanlearnformwhattheyareattemptingtodo.It’saresearchthatisverymuchneeded.59.Theaimof“Noah’sArk”projectisto.A.makeeffortstoclonetheendangeredpandasB.saveendangeredanimalsfromdyingoutC.collectDNAofendangeredanimalstostudyD.transferthenuclearofoneanimaltoanother60.AccordingtoProfessorKraemer,themajorproblemincloningpandaswouldbethelackto.A.availablepandaeggsB.hostanimalsC.qualifiedresearchersD.enoughmoney61.Thebesttitleforthepassagemaybe.A.China’sSuccessinPandasCloningB.TheFirstClonedPandaintheWorldC.ExploringthePossibilitytoClonePandasD.China—theNativePlaceofPandasForever62.Fromthepassageweknowthat.A.KraemerandhisteamhavesucceededincloningadogB.scientiststrytoimplantapanda’seggintoarabbitC.KraemerwillworkwithChinesescientistsincloneresearchesD.abouttwothousandofspecieswillprobablydieoutinacenturyCThecommoncoldistheworld’smostwidespreadillness,whichisplagues（疫病）thatfleshreceives.Themostwidespreadfallacy（谬误）ofallisthatcoldscausedbycold.Theyarenot.Theyarecausedbyviruses（病毒）passingonfrompersontoperson.Youcatchacoldbycomingintocontact,directlyorindirectly,withsomeonewhoalreadyhasone.Itcoldcausescolds,itwouldbereasonabletoexpecttheEskimostosufferfromthemforever.Buttheydonot.Andinisolatedarcticregionsexplorershavereportedbeingfreefromcoldsuntilcomingintocontactagainwithinfectedpeoplefromtheoutsideworldbywayofpackagesandmaildroppedfromairplanes.DuringtheFirstWorldWarsoldierswhospentlongperiodsinthetrenches（战壕）,coldandwet,showednoincreasedtendencytocatchcolds.IntheSecondWorldWarprisonersatthenotoriousAuschwitzconcentrationcamp（奥斯维辛集中营）,nakedandstarving,