专题限时训练(二十六)[科普知识型阅读理解(二)](限时：25分钟)(一)Studyingvolcanoesisademandingprofession.HazelRymerfrequentlyhastostrugglethroughrainforests,climbtothetopofmountains,thenclimb200metresintothecraterofactivevolcanoes.Butthe38yearoldvolcanologistdoesherbesttomakeitsoundlessalarmingthanitis.“Drivingtoworkismorerisky，”sheinsists.“AndthedeepestIgointothecraterofavolcanoisabout300metres，”sheadds,tryingtomakeitallsoundasordinaryastakingthedogforawalk.Hazelhasbeenstudyingvolcanoesforalongtime,soit'snotsurprisingthatsheisusedtothedanger.Herinterestinvolcanoesbeganatschool.AteachergaveherabookaboutPompeii.“IrememberreadingabouttheeruptionofVesuviusandthedestructionofthecity，”sheexplains.“ThethoughtofallthosepeoplejustfrozenintimehadquiteaneffectonmeandIamstillexcitedbytheirdangerousbeautytoday.”Nowadays,volcanoesaregettingmoreandmoreunpredictable.Therehavebeenmanychangesinsealevelcausedbyglobalwarmingandmeltingicecaps.Thesehaveresultedinsomedormantvolcanoeserupting,sostudyingthemismoredangerousthaneverbefore.Hazelsaysthatalthoughshedoesn'ttakeanyunnecessaryrisk,shehashadsomefrighteningmoments.HerworstexperiencewasontheslopesofMountEtnainSicily,whenshewasslowlysurroundedbylava.“Ihadachoiceofwalkingtenhourstogetaroundthelavafloworjustwalkingacrossit，”sheexplains.Shechosetopickapathacrossthecoolerrocksinthelavastream.“Iguessitwasfivemetres.Theflowwas1，000℃，soifyouhesitatedyourbootswouldbegintomelt.Itwasscary,butitreallywasapracticaldecision—therewasn'ttimetodoanythingelse.”Andwhataboutthefuture?“Ihaven'tbeentothevolcanoesinIndonesiayet.AndIwouldlovetospendsometimeworkingintheAntarctic，”shesays.“Iwouldalsoliketoknowwhyquietlavaflowseruptfromsomevolcanoesandwhyothervolcanoesgobang.”Inotherwords,HazelRymerwon'tbeexchanginghervolcanoesfortherelativesafetyofDrivingtoworkjustyet.1.Hazel'sclaimthat“Drivingtoworkismorerisky”thanexploringvolcanoesshowsthat________.A.peoplehaveexaggeratedthedangersofvolcanoesinthepastB.HazeldoesnotreallyunderstandthedangeroussituationssheputsherselfinC.therearemanybaddriversintheplacewhereHazellivesD.Hazelisbeingmodestandunderstatingthedangersshefaces2.WhendidHazelfirstbecomeinterestedinvolcanoes?A.WhenshewasvisitingItaly.B.Whenshewasatschool.C.Whenshewastwenty.D.WhenshesawVesuvius.3.Theunderlinedword“These”(Paragraph3)refersto________.A.meltingicecapsB.volcaniceruptionsC.changesinsealevelD.highertemperatures4.WhenHazelwasonMountEtnashehadto________.A.takeadangerousrouteB.takeanunnecessaryriskC.leaveherbootsbehindD.walkfortenhoursaroundthemountain5．Inthefuture,Hazelwantsto________.A.revisitvolcanoessheknowsB.goonholidaytotheAntarcticC.findalessdangerousjobD.discovernewthingsaboutvolcanoes(二)Europe'sdeadlyoutbreakofarareformofE．coli(大肠杆菌)bacteriahasbroughtnewattentiontofoodsafetyissues.E．colibacterianaturallyliveintheintestines(肠)ofhumansandmanyanimals.MostkindsofE．coliareharmlessbutsomecanmakepeoplesick.Oneoftheproblemswhenpeoplegetsickfromfoodisthatthesimplestquestionisoftendifficultorevenimpossibletoanswer.Justwhatdidthepeopleeatthatmadethemsick?Ofcourse,onewaytoavoidsuchproblemsistokeepdangerousorganismsoutofthefoodsupply.This_is_easier_said_than_done,_butscientistskeeplookingfornewways.ScientistsintheUnitedStateshavedevelopedanexperimentalsystemthatusesahightechoptical(光学的)scanner.Theinspectionsystemis...
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