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1、请看清答案顺序再做！《科技英语》资料PartIReadingComprehensionPassage1Geologyisanaturalscience.Withitmencandiscoverallkindsofusefulminerals.Geologystudiestheearth.Butofthethreespheres,theatmosphere,thehydrosphereandthelithosphere,itonlydirectlystudiesthelithosphere.Itstudiesthecompositionanddistrib
2、utionofmaterialintheearth’scrust.Itstudiesalsotheformation,changesanddevelopmentofrocksandmineralsintheearth’scrust.Geologyisaverycomplexscience.Therearemanybranchesingeology.Mineralogyisthescienceoftheminerals.Petrologyisthescienceoftherocks.Geomorphologydealswithoriginoflandsca
3、pesandchangesinthem.Historicalgeologytracestheevolutionanddevelopmentoftheearthandoftheanimalsandplantsonit.Stratigraphystudiesthesequenceoftherocksintheearth’scrust.Paleontologydealswiththeancientanimalsandplants.Thesearejustafewofthemostimportantbranchesofgeology.Geologyisavery
4、importantscience.Wedependupongeologyforthediscoveryofmineraldepositsneededbythevariousindustries.Alotofmineralsareusedasfuelandrawmaterials.Withoutthemindustrializationisimpossible.Mineralsarealsousedasfertilizersinagriculture.Chinaisveryrichinmineraldepositsofallkinds.Thestudyof
5、geologywillhelpustodiscoverthem.Petroleumoccurswidelyintheearthasgas,liquid,semisolid,orsolid,orinmorethanoneofthesestatesatasingleplace.Chemicallyanypetroleumisanextremelycomplexmixtureofhydrocarbon(hydrogenandcarbon)compounds,withminoramountsofnitrogen,oxygen,andsulfurasimpurit
6、ies.Liquidpetroleum,whichiscalledcrudeoiltodistinguishitfromrefinedoil,isthemostimportantcommercially.Itconsistschieflyoftheliquidhydrocarbons,withvaryingamountsofdissolvedgases,bitumens,andimpurities.Petroleumgas,commonlycallednaturalgastodistinguishitfrommanufacturedgas,consist
7、softhelighterparaffinhydrocarbons,ofwhichthemostabundantismethanegas(CH4).Thesemisolidandsolidformsofpetroleumconsistoftheheavyhydrocarbonsandbitumens.Geologyplaysanimportantroleinthesearchforoilandnaturalgas.Fourprerequisitesarenecessaryforoil(andgas)toaccumulateincommercialquan
8、titiesinanarea:(1)Theoiloriginatesinasou
