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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
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erwalks.Inmilitaryactions,search-and-rescueoperations,andscientificfieldstudies,peoplerelyincreasinglyoncellphones,globalpositioningsystem(GPS)5receivers,night-visiongoggles,andotherbattery-powereddevicestogetaroundanddotheirwork..Thebackpack'selectricity-generatingfeaturecoulddramaticallyreducetheamountofawearer'sloadnowdevotedtosparebatteries,reportRomeandhiscolleaguesintheSept.9Science6.Thebackpack'selectricity-creatingpowersdependonspringsusedtohangaclothpackfromitsmetalframe.Theframesitsagainstthewearer'sback,andthewholepackmovesupanddownasthepersonwalks.Agearmechanismconvertsverticalmovementsofthepacktorotarymotionsofanelectricalgenerator,producingupto7.4watts.
Unexpectedly,testsshowedthatwearersofthenewbackpackaltertheirgaitsinresponsetothepack'soscillations,sothattheycarryloadsmorefortablyandwithlesseffortthantheydoordinarybackpacks.Becauseofthatsurprisingadvantage,Romeplanstomercializebothelectricandnon-electricversionsofthebackpack.
Thebackpackcouldbeespeciallyusefulforsoldiers,scientists,mountaineers,andemergencyworkerswhotypicallycarryheavybackpacks.Fortherestofus,power-generatingbackpackscouldmakeitpossibletowalk,playvideogames,watchTV,andlistentomusic,allatthesametime.Electricity-generatingpacksaren'tonthemarketyet,butifyoudogetoneeventually,justmakesuretolookbothwaysbeforecrossingthestreet！
词汇:
backpack/(b(kp(k/n.背包watt/w(t/n.瓦(特)receiver/r((si(v(/n.接收机gait/(e(t/n.步态,步法night-visiongoggle夜视镜oscillation/((s((le(((n/n.摆动spring/(pr((/n.弹簧mercialize/k((m((((la(z/v.商业化vertical/(v((((k(l/adj.垂直的mountaineer/(ma(nt((n((/n.登山运动员rotary/(r((t(r(/adj.旋转的注释:
MP3:Inter上最流行的音乐格式,最早起源于1987年德国一家公司的EU147数字传输计划,它利用MPEGAudioLayer3的技术,将声音文件用1:12左右的压缩率压缩,变成容量较小的音乐文件,使传输和储存更为便捷,更利于互联网用户在网上试听或下载到个人计算机.
Philadelphia:费城[美国宾夕法尼亚州东南部港市]
WoodsHole:美国马萨诸塞州的一个渔村,也是许多重要研究机构所在地,如:theMarineBiologicalLaboratory,theSeaEducationAssociation以及theWoodsHoleOceanographicInstitution,
Mass.:Massachusetts的缩写:马萨诸塞州,美国东北部的一个州.
globalpositioningsystem(GPS):全球定位系统
Science:美国的Science杂志为国际上着名的自然科学综合类学术期刊,在世界学术界享有盛誉.Science杂志创刊于1880年,该杂志具有新闻杂志和学术期刊的双重特点,每周除向世界各地发布有关科学技术和科技政策的重要新闻外,还发表全球科技研究最显着突破的研究论文和报告.
练习:
1.Backpacksareconvenientbecause
A)theycanbeverylarge
B)theycanholdasmanythingsasyouwanttocarry.
C)yourhandsarefreedtodootherthings.
D)youdonothavetocarrythingswithyou.
2.WhatisthemostimportantfeatureofthebackpackinventedbyLawrenceC.Romeandhiscolleagues
A)Itproduceselectricityforelectronicdeviceswhilethewearerwalks.
B)Itcanbeusedascellphones,GPSinthemilitaryactionsorfieldstudies.
C)Itissmallandconvenient.
D)Itislightandeasytocarry.
3.Theword"springs"inParagraph3means
A)asmallstreamofwaterflowingnaturallyfromtheearth.
B)theseasonoftheyear,occurringbetweenwinterandsummer.
C)theactoraninstanceofjumpingorleaping.
D)alengthofmetalwoundaround,whichreturnstoitsoriginalshapeafterbeingpushed.
4.AccordingtoParagraph4,whatdoesRomeplantodo
A)Tomakethebackpackmorefortableforthewearer.
B)Toputthebackpackonthemarket.
C)Totesttheadvantageofthebackpack.
D)Topromotethebackpackinanewspaperorontelevision.
5.Whatisimpliedin"ifyoudogetoneeventually,justmakesuretolookbothwaysbeforecrossingthestreet！"
A)Youwillbetooexcitedtowatchthetraffic.
B)Enjoyingelectronicdeviceswhilewalkingmayinvitetrafficaccidents.
C)Itisnotpossibleforyoutogetsuchabackpack.
D)Itiswiseofyoutohavesuchabackpack.
答案与题解:
1.C第一段告诉我们,因为背包可以装许多东西,所以可以将双手解放出来做其它事情:tofreeyourhandstodootherthings.
2.A第二段的第一句说,LawrenceC.Rome及其同事们发明的这种背包,当背着背包走路时,会有电能产生,该段最后一句告诉我们,背包的这种性能可减少背包的重量,因为不必携带备用电池.
3.D"springs"在此是弹簧的意思.spring是一个多义词:泉水(A),春天(B),弹跳(C).
4.B第四段最后一句的意思是:Rome计划将这种背包商业化,即,推向市场.A,C,D在文中均未提到.D的意思是为背包做广告.
5.B这个句子的字面意思是:如果你终于得到这样的背包,过马路时一定要两面都看看.也就是说,不要因为同时玩着游戏,听着音乐,看着电视,太专注以致不注意来往车辆了.
2.FlyingtheHyper1Skies(C级)
(替换2007年用书理工类阅读理解第六篇:LivewithComputer)
Alittleairplanehasgivennewmeaningtotheterm"goinghyper."
TheHyper-X2recentlybroketherecordforair-breathingjetplaneswhenittraveledatahypersonicspeedofseventimesthespeedofsound.That'sabout5,000milesperhour.Atthisspeed,you'dgetaroundtheworld–flyingalongtheequator–inlessthan5hours.
Thehyper-Xisanunmanned,experimentalaircraftjust12feetlong.Itachieveshypersonicspeedusingaspecialsortofengineknownasascramjet3.Itmaysoundlikesomethingfromaicbook,butengineershavebeenexperimentingwithscramjetssincethe1960s.
Foranenginetoburnfuelandpr
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