工商银行考试英语部分专项练习

英语部分专项练习（一）Part I Reading Comprehension Directions: There are 4 reading passages in this part. Each

英语部分专项练习（一） PartIReadingComprehension Directions:Thereare4readingpassagesinthispart.Eachpassageis followedbysomequestionsorunfinishedstatements.Foreachofthemthere arefourchoicesmarkedA.,B.,C.andD.Youshoulddecideonthebest choiceandmarkthecorrespondingletterontheAnswerSheetwithasingle linethroughthecenter. Questions1to5arebasedonthefollowingpassage: Ifthesalinityofoceanwaterisanalyzed,itisfoundtovaryonlyslightlyfrom placetoplace.Nevertheless,someofthesesmallchangesareimportant. Therearethreebasicprocessesthatcauseachangeinoceanicsalinity.One oftheseistheofwaterfromtheoceanbymeansof subtraction evaporation—conversionofliquidwatertowatervapors.Inthismanner,the salinityisincreased,sincethesaltsstaybehind.Ifthisiscarriedtothe extreme,ofcourse,whitecrystalsofsaltwouldbeleftbehind;this,bytheway, ishowmuchofthetablesaltweuseisactuallyobtained. Theoppositeofevaporationisprecipitation,suchasrain,bywhichwateris addedtotheocean.Heretheoceanisbeingdilutedsothatthesalinityis decreased.Thismayoccurinareasofhighrainfallorincoastalregionswhere riversflowintotheocean.Thussalinitymaybeincreasedbythesubtraction ofwaterbyevaporation,ordecreasedbytheadditionoffreshwaterby precipitationorrunoff. Normally,inwherethesunisverystrong,theoceansalinityis tropicalregions somewhatthanitisinotherpartsoftheworldwherethereisnotas higher muchevaporation.Similarly,incoastalregionswhereriversdilutethesea, salinityissomewhatlowerthaninotheroceanicareas. Athirdprocessbywhichsalinitymaybealteredisassociatedwiththe formationandmeltingofseaice.Whenseawaterisfrozen,thedissolved materialsareleftbehind.Inthismanner,seawaterdirectlybeneathfreshly formedseaicehasahighersalinitythanitdidbeforetheiceappeared.Of course,whenthisicemelts,itwelltendtodecreasethesalinityofthe surroundingwater. IntheWeddellSea,offAntarctica,thedensestwaterintheoceansisformed asaresultofthisfreezingprocess,whichincreasesthesalinityofcoldwater. Thisheavywatersinksandisfoundinthedeeperportionsofoceansofthe world. 1.Whatisthemaintopicofthepassage? A.Wheredowegetourtablesalt? B.Oceanicsalinityintropicalregions C.Threebasicprocessesthatalteroceanicsalinity D.Variationsofsalinityindifferentpartsoftheocean 2.Accordingtotheauthor,theoceanicsalinityisusuallylowerin_____.