GRE-issue写作之自己总结的万能例子

RenaissanceForexample,thehelplessfatecanbefeltfromthetragedyworks,writtenbyShakespeare.MonaLisa,createdbyBeethoven,revealedthemysteriousandimplicitsmile.Althoughworkscompletedbydifferentartistsandwritersrevealedslightvariationsintheaccess,performingform,andsocialaspectfocusingon,asfarascommonthemeandhiddenideaswereconcerned,theobvioussimilriestoeachotherseemedmuchmorethananyoftheminutedifferences,namely,resistingthefeudalizationandcorruptinstitutionandenlighteningfreedomofhumanbeing.Thisiscalled“Renaissance”inthehistory.Geneticengineering迄今为止，基因工程还没有用于人体，但已在从细菌到家畜的几乎所有非人生命物体上做了实验，并取得了成功。事实上，所有用于治疗糖尿病的胰岛素都来自一种细菌，其ＤＮＡ中被插入人类可产生胰岛素的基因，细菌便可自行复制胰岛素。基因工程技术使得许多植物具有了抗病虫害和抗除草剂的能力；在美国，大约有一半的大豆和四分之一的玉米都是转基因的。目前，是否该在农业中采用转基因动植物已成为人们争论的焦点：支持者认为，转基因的农产品更容易生长，也含有更多的营养（甚至药物），有助于减缓世界范围内的饥荒和疾病；而反对者则认为，在农产品中引入新的基因会产生副作用，尤其是会破坏环境。诚然，仍有许多基因的功能及其协同工作的方式不为人类所知，但想到利用基因工程可使番茄具有抗癌作用、使鲑鱼长得比自然界中的大几倍、使宠物不再会引起过敏，许多人便希望也可以对人类基因做类似的修改。毕竟，胚胎遗传病筛查、基因修复和基因工程等技术不仅可用于治疗疾病，也为改变诸如眼睛的颜色、智力等其他人类特性提供了可能。比如，运用此技术，可使患儿的父母生一个和患儿骨髓匹配的孩子，然后再通过骨髓移植来治愈患儿。Sofar,geneticengineeringhasnotbeenusedinhuman,butithasachievedsuccessfulexperimentinalmostalltheobjectsonnon-humanlife--frombacteriatolivestockalready.Infact,alltheinsulintreatmentfordiabetescomefromakindofbacteriawhichcanbeinsertedintoahumangenestomakecopiesofinsulinbybacteriaoneself.Geneticengineeringtechnologymakesmanyplantshavethedisease-resistantabilityandherbicide,IntheUSA,abouthalfofsoybeanandaquarterofcornisgeneticallymodified.Atpresent,whetherthetransgenicplantsusedinagriculturehasbecomethefocusofdebate,transgenicsupportersthink:theagriculturalisfastertogrowth,andeasiertocontainmorenutrition(evenmedicine),tohelpslowdownworldwidefamineanddisease,Butopponentsargued,introducingnewgenesintoagriculturalwilloccursideeffects,especiallydestroytheenvironment.Advantage:Admittedly,ethicistrejectedtheinnovativedevelopmentofgeneticengineeringbecause,althoughitresolvedsomeproblems,italsoproducednewcomplications.Nevertheless,therearestillmanygenesfunctionandworkprinciplebeyondhumanknowledge,butusinggeneticengineeringcanmakethetomatoeshaveanti-cancereffects,makethesalmonbiggerthaninnature,andalsomakepetnolongerallergy,manypeopleareexpecttodosimilarhumangeneticmodification.Afterall,geneengineeringtechnologycannotonlycurethedisease,alsomakemostpossibilityforchangehumancharacteristics,suchaseyecolor,intelligenceandothers.Forexample,byusingthistechnology,itispossibletomaketheparentspregnanttobornababywhosebonematchesoneneedshomogenousbone,andthenthroughthebonemarrowtransplantstocurepatients.Wesaidtheadvantagesanddisadvantagesofbiologicaltechnology,ismainlyreferstothegeneticengineering.弊:1)克隆将减少遗传变异，通过克隆产生的个体具有同样的遗传基因，同样的疾病敏感性，一种疾病就可以毁灭整个由克隆产生的群体。可以设想，如果一个国家的牛群都是同一个克隆产物，一种并不严重的病毒就可能毁灭全国的畜牧业。2)克隆技术的使用将使人们倾向于大量繁殖现有种群中最有利用价值的个体，而不是按自然规律促进整个种群的优胜劣汰。从这个意义上说，克隆技术干扰了自然进化过程.7)克隆技术对家庭关系带来的影响也将是巨大的。一个由父亲的DNA克隆生成的孩子可以看作父亲的双胞胎兄弟，只不过延迟了几十年出生而已。很难设想，当一个人发现自己只不过是另外一个人的完全复制品，他（或她）会有什么感受？所以说,科学技术有时就是一把双刃剑,有利也有没弊,没有标准答案!就看人们这样利用了!Disadvantages:1)geneticengineeringwouldreducethegeneticvariationofindividualsandownthesamediseasessensitivity,asaresult,adiseasecandestroywholecolonybycloning.Sowecanimaginethat,ifanationisthesameclonedcattle,akindoftheviruscoulddestroytheanimalhusbandry.2)Theuseofgeneticengineeringwillmakepeopletendtopropagatethemostvalueindividualwithinexistingcolony,ratherthanthenaturallawofsurvival.Inthissense,thecloningtechnologywillinterrupttheprocessionofnaturalevolution.Interference7)geneticengineeringwillleadagreatinfluenceonfamilyrelationships.AfatheroftheDNAcanbeseenastwinbrothers,butonlydelayedfordecades.Itishardtoimaginethat,whenamanfoundhimselfwasjustanotherman'sfullyreproductions,whatfeelingswillheorshehave?So,scienceandtechnologyisadouble-edgedsword,sometimes,therearenoharmandnostandardanswer!Justlooklikepeopletouse!GalileoGalileo,Italianastronomerandphysicist,discoveredlawofuniformaccelerationoffallingbodies.Forexample,Galileo,thegreatastronomerandphysicistinXcentury,overthrowedthefamoustheory,establishedover2000yearsagobygreatpeople—Aritle,throughtheexperienceandthusledtodiscoverlawofuniformaccelerationoffallingbodies.Therefore,thequestiononthesciencemightusuallycontributetheunexpecteddevotiontotheprogressofscience,notobstacleone.Bearinggeneration“垮掉的一代”是美国战后的一代，他们成长在一个循环发生战争的世界上，他们中的一些成为了一种新的文化的杰出代表，即“垮掉”哲学。他们的思想在绝对自由的躯体里得以升华，在美国战后忧伤失望让人窒息的精神“荒原”时代拔地腾空而起，划破了迷茫的天空，给人们以极大震撼的同时也给了人们面对现实的勇气，在很程度上决定当时社会的发展趋势。BeatgenerationisindicatedthatAmericanwhogrewupinacycleofworldwar,butsomeofthembecameaoutstandingrepresentativesoftendencyofnewculture,namedthecollapsephilosophy.Theirthoughtisupdatedinabsolutefreedombody,skyrocketedinthewastelanderawhichmakethepeoplefeeldisappointedduringtheworldwartwo,rippedoutoftheskyandovertopeoplewithgreatshockalsogivespeoplethecourageoffacingreality,certainly,theydeterminedthesocialdevelopmenttrendatthattime..Thatcherism撒切尔主义ThatcherisminferredtothepoliciesputforwardbyMargaretThatcher,thefirstwomanprimeministerinEnglandin1979.themaincontentsofherpoliciesincludedthereturntoprivateownershi