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理工类类论文范文素材,与电力工程师职文成人相关论文范文

本论文是一篇理工类类论文范文,关于电力工程师职文成人相关研究生毕业论文开题报告范文。免费优秀的关于理工类及答案及学术期刊方面论文范文资料,适合理工类论文写作的大学硕士及本科毕业论文开题报告范文和学术职称论文参考文献下载。

尔夫大学.该校成立于1964年,是一所公立的综合性大学.在2005年加拿大综合类大学评比中,圭尔夫大学名列第3名,是全加拿大最着名的高等学府之一.

3.Ontario:安大略.加拿大中东部的一个省.

4.theWorldConservationUnion:世界自然保护联盟.全球最大,最重要的自然保护网络机构,它集合了82个国家,111个政府机构,800多个非政府组织以及来自181个国家的约1万多名科学家和专家,形成了世界环保领域里独一无二的全球性合作关系.

练习:

WhichofthefollowingaboutthesignificanceoftheresearchoncrypticspeciesisNOTtrue

A)Theresultsoftheresearchcanhelpthedevelopmentofmanyotherresearchareas.

B)Theresultsoftheresearchcanhelpthedevelopmentofbiodiversityestimates.

C)Theresultsoftheresearchcanhelpourunderstandingofinfectiousdiseaseevolution.

D)Theresultsoftheresearchcanhelpourunderstandingof"survivalofthefittest."

Whatwasscientists'understandingofcrypticspecies

A)Theyoccurredinequalnumbersinallbiogeographicalregions.

B)Theyweremostlyfoundininsectsandreptiles.

C)Theywerelikelytobeintropicalratherthantemperateregions.

D)BothBandC.

3.Doscientistsknowhowmanycrypticspeciesexist

A)Notyet.

B)Yes,theydo.

C)Theywillknowtheanswerinanotheroneortwoyears.

D)Theywillneverknowtheanswer.

4.WhichofthefollowingabouttheAfricanbushelephantandtheAfricanelephantistrue

A)TheWCUareinterbreedingthoseelephants.

B)Theyareinterbreedingspecies.

C)Theyaretwogeicallydistantspecies.

D)Theydependoneachotherforsurvival.

5.PeoplewereconfusedintheirattemptstocontrolmalariainEuropeintheearly1900s,becausescientists

A)identifiedonlyonemosquitospeciesinsteadofsixspecies.

B)thoughtonlythreemosquitospeciestransmitteddisease.

C)thoughttherewasonlyonemosquitospecies.

D)didnotknowwhatspecieswasbeingstudied.

答案与题解:

1.D短文的第一段第二句的大意是,研究结果为广泛的研究领域提供启示,包括生物多样性研究,还能帮助我们理解传染疾病及其演变.所以,选项A,B,C都是正确的,它们不是答案.选项D的"适者生存"的内容文章中没有提及,因此是本题的答案.

2.D短文的第二段第二句描述的是科学家目前的研究结果,第三段描述的是科学家在这之前对于crypticspecies的理解.本题用的是过去式,问的是过去的状况,因此,答案在第三段中,B和C是答案,所以D是正确选择.

3.A第三段和第五段提供了答案.第三段的最后一句中的Until等,noonewillknowjusthowmanycrypticspeciesexist.其意思就是人们目前还不了解.第五段的最后一句也说明了研究者目前对此尚未了解.

4.C答案在第六段中.该段举了非洲大象为例,说明什么是crypticspecies.第六段的句子"A2001studyfoundtheelephantswereactuallytwogeicallydistinct,non-interbreedingspecies"是选择C的依据.选项A不对,theWCU并没有杂交繁殖这两种象.选项B不对,短文说这两种象是非杂交物种.选项D的内容短文中找不到.

5.A短文最后一段告诉我们,由于对蚊子种类不了解,20世纪初期疟疾曾肆虐欧洲,最终,科学家才了解到蚊子这一物种不是由一个种类而是由六个种类组成.所以,应该选择A.

第四篇CompactDisks

1IfsomeonesaystoyouyourmusicCDsdon'treallyholda

理工类类论文范文素材nymusiconthem,andtheyonlyhavenumbersrecordedonthem,youmaynotbelieveit.Infact,heisrightinthatsoundisactuallyrecordedontotheCDsasspecialnumbers–adigitalcode1.ThecodeispressedontotheCDasbumpsonalongspiraltrackalmostfivekilometerslong.Thesebumpsareanaverageof0.5micronswide

2AsmalllaserbeamshinesontothebumpsastheCDturns.Thelightisreflectedbacktoareceiverthatrecordshowthelaserlightbouncesback.ThisletstheCDplayer2turnthereflectedlightbackintotheoriginalcode.Thismeansyoucanheartheoriginalcodeasmusic.

3Digitalcodesareusedwithmanytechnologies.E-mailneedsthesekindsofcodenumbers.Spaceprobesmunicatewiththeirgroundstationonearthusingdigitalcodes.Barcodesarereadasdigitalcodesinputersystems.Digitalmunicationswithcellphonesneeddigitalcodes.Weatherradiosalsotuneintospecificsignalsusingthesecodes.

4Therearemanytypesofpactdisks.OneformatiscalledCD-RWs.Theycanberecordedonandre-recordedon(rewrittenon)asyouwoulddowithafloppydisk3.AnotherformatistheCD-ROM.ThetechnologyforrecordingonthesedisksisdifferentfromotherCDs.TheseCDshaveadyelayerthattheCDwritercandarkenorleaveclear.Theclearanddarkspotsarethedigitalcode.CD-ROMstandsforCompactDisc-ReadOnlyMemory4.Thisdiskislikea"super"floppydiskthatcanholdlotsofinformation.OneCD-ROMcanholdthesameamountofdataas500floppydisks.Informationispermanentlyrecordedontoit.ComputergamesandotherprogramsareconsideredtobeCD-ROMs.

5CDswerefirstsoldtothepublicin1982.TheseCDsstillplaywellandsoundfine.CurrentCDsareexpectedtolastbetween70to200years.Ofcourse,youcanmakesureyourCDslastalongtimebytakingcareofthem.

6Sciencekeepsondeveloping.Itmaynotbemanymoreyearsbeforeapletelynewtechnologyisinvented5andintroducedtothepublicformusicrecording.Inthemeantime,thereisnodoubtyouwillcontinuetoenjoylisteningtoyourfavoritemusiconCDs6andplayingyourfavoriteputergamesonCD-ROMs.

词汇:

bump/b(mp/n.隆块,隆起floppydisk软(磁)盘spiral/(spa((r(l/adj.螺旋形的format/(f(m(t/n.格式probe/(pr((b/n.探测器dye/da(/n.染色floppy/(fl(p(/adj.松软的Permanently/(p(:m(n(ntl(/adv.永久地

注释:

1.heisrightinthatsoundisactuallyrecordedontotheCDsasspecialnumbers–adigitalcode:他说的对,因为实际上声音以特殊的数字的形式,即数码,刻录在CD碟片上.inthat是"因为",如:

Waterisessentialinthatwithoutitalllivingthingswoulddie.

(水是基本要素,因为没有水,所有生物都要死亡.)2.CDplayer:

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