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育龙网核心提示: I。ReadingComprehension30%,1markeach)Passage1Asthehorizonsofsciencehaveexpanded,twomaingroupsof
I。ReadingComprehension30%,1markeach)Passage1Asthehorizonsofsciencehaveexpanded,twomaingroupsofscientistshaveemerged。Oneisthepurescientist;theother,theappliedscientist。Thepureortheoreticalscientistdoesoriginalresearchinordertounderstandthebasiclawsofnaturethatgovernourworld。Theappliedscientistadaptsthisknowledgetopracticalproblems。Neitherismoreimportantthantheother,however,forthetwogroupsareverymuchrelated。Sometimes,however,theappliedscientistfindstheproblemforthetheoreticalscientisttoworkon。Letstakeaparticularproblemoftheaircraftindustry:heat-resistantmetals。Manyofthemetalsandalloyswhichperformsatisfactorilyinacarcannotbeusedinajet-propelledplane。Newalloysmustbeused,becausethejetengineoperatesatamuchhighertemperaturethananautomobileengine。Theturbinewheelinaturbojetmustwithstandtemperaturesashighas1,600degreesFahrenheit,soaircraftdesignershadtoturntotheresearchmetallurgistforthedevelopmentofmetalsandalloysthatwoulddothejobinjet-propelledplanes。Dividingscientistsintotwogroupsisonlyonebroadwayofclassifyingthem,however。Whenscientificknowledgewasverylimited,therewasnoneedformentospecialize。Today,withthegreatbodyofscientificknowledge,scientistsspecializeinmanydifferentfields。Withineachfield,thereisevenfurthersubdivision。And,withfinerandfinersubdivisions,thevariousscienceshavebecomemoreandmoreinterrelateduntilnoonebranchisentirelyindependentoftheothers。Manynewspecialties--geophysicsandbiochemistry,forexample--haveresultedfromcombiningtheknowledgeoftwoormoresciences。1。Theappliedscientist______。A。isnotalwaysinterestedinpracticalproblemsB。providesthebasicknowledgeforpracticeC。appliestheresultsofresearchtopracticeD。doesoriginalresearchtounderstandthebasiclawsofnature2。Theexamplegiveninthepassageillustrateshow___。A。purescienceoperatesindependentlyofappliedscienceB。theappliedscientistdiscoversthebasiclawsofnatureC。appliedsciencedefinesalltheareasinwhichbasicresearchisdoneD。appliedsciencesuggestsproblemsforthebasicscientist3。Theproblemdiscussedinthesecondparagraphcalledfor____。A。selectingthebesthear-resistantmetalfromexistingmetalsB。developingaturbinewheelcapableofgeneratingheatupto1,600degreesFahrenheitC。developingmetalsandalloysthatwouldwithstandterrifictemperaturesD。causingthejetenginetooperateathighertemperatures4。Finermadfinersubdivisioninthefieldofsciencehasresultedin_____。A。greaterindependenceofeachscienceB。greaterinterdependenceofallthevarioussciencesC。theeradicationoftheneedforspecialistsD。theneedforonlyonclassificationofscientists5。Thehorizonsofsciencehaveexpandedmeansthat____。A。thehorizonchangesitssizefromyeartoyearB。sciencehasdevelopedmorefieldsofendeavorC。scientistshavemadegreatprogressinstudyingthehorizonD。scientistscanseefurtheroutintospace