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1、聲明本人鄭重聲明：所呈交的學位論文，是本人在指導教師的指導下，獨立進行研究所取得的成果。除文中已經注明引用的內容外，本論文不包含其他個人或集體已經發(fā)表或撰寫過的研究成果。對本文的研究做出重要貢獻的個人和集體，均已在文中以明確方式標明。本聲明的法律責任由本人承擔。論文作者簽名：冶多日期：竺!!：!：!關于學位論文使用權的說明本人完全了解太原理工大學有關保管、使用學位論文的規(guī)定，其中包括：①學校有權保管、并向有關部門送交學位論文的原件與復印件；②學校可以采用影印、縮印或其它復制手段復制并保存學位論文；③學?？稍试S學
2、位論文被查閱或借閱；④學?？梢詫W術交流為目的，復制贈送和交換學位論文；⑤學?？梢怨紝W位論文的全部或部分內容(保密學位論文在解密后遵守此規(guī)定)。簽名：——煽日期：％D。6．占導師簽名：日期：叫≥。‘、lb太原理工大學碩士學位論文ALoNGITUDINALSTUDYoFoRAI。ENGLISHLEⅪCALCHUNKSBYGRADUATESOFSCIENCEANDENGINEERINGABSTRACTSincetheterm‘‘chunking'’hasbeenbroughtintothelinguisticres
3、earchfieldin1970s’，lexicalchunkhasachievedmuchattentionoflinguists．Therealreadyexistagreatnumberoftheoreticalandempiricalfindingsinthisfield．Nevertheless，itisnotuntiltheendof20thcenturythatChineseresearchersbegantocontemplatetheuseoflexicalchunks．Anoverwhelm
4、ingconsensusamonglinguistsisthattheuseoflexicalchunkscouldimprovetheoralproficiency,despitethattherehasbeennogeneralagreementonthedefinitionandclassificationoflexicalchunkSOfar．Andthelexicalchunkapplyingteachingapproachhasbeenwidelyacceptedbyteachers．Althoug
5、htherehasbeenanincreasinginterestinstudyoflexicalchunk，researchersprefertochoosecollegestudentsorEnglishmajorgraduatesasresearchsubjects。It’Sapitythataweaknesshasexistedinstudyofuseoflexicalchunksbygraduatesofscienceandengineeringinalongitudinalview．Scienceg
6、raduates，withauniquewaysofthinkingandstudyhabits，belongtoahugecommunitywhichshouldbeattachedimportance．BasedonthedefinitionproposedbyMa(2011)andtheclassificationaccordingtonumbersofcompositionwords，thestudyattemptstoinvestigatetheuseoflexicalchunksinoralprod
7、uctionbysciencegraduates．Thepresentstudyrandomlyselects32graduatesmajoringincivilengineering，waterconservancyandHVAC(heatingventilationairconditioning)ina21keyuniversity．Thepurposeofthisstudyistoexploretheoverallcharacteristicsanddevelopmentalfeaturesoflexic
8、alchunksusein㈣6川6川同圳5Ⅲ9洲3?2刪Y太原理工大學碩士學位論文their4-peoplediscussionlinkduringthe2010-2011academicyear．Thestudytriestoanswerthefollowingquestions：(1)Fromthecross—sectionalView，whatarethegeneralchara
