Unit3Inventorsandinventions话题词汇1．breakthroughn．突破；重大进展2．conveniencen．便利；方便3．electronicadj.电子的4．intelligentadj.智能的5．inventionn．发明；创造6．technicaladj.技术的；工艺的7．beinthelead领先8．followthefashion追随时尚9．inthefieldofscience在科学领域10．withthedevelopmentof随着……的发展话题佳作假设你是李华，你的朋友Jim来信询问有关车轮的情况。请你根据下表所提供的信息给他写一封回信，简要介绍车轮的发明及其影响，并谈一谈你对车轮的看法。最早出现时间大约6500年前最早出现地点亚洲发展由仅用于运输重物发展为用于轮式车辆；由木制发展为钢制影响使人可以快速搬动大大超过自身重量的物体；促成多种技术的发展与进步佳作欣赏DearJim，I’mhappytoreceiveyourletter.NowI’dliketotalkaboutthewheel.Researchershaveprovedthatthefirstwheelwasinventedabout6,500yearsagoinAsia.Atfirst，itwasonlyatoolinventedtohelppeopletransportheavythingstillitbecameapartofavehicle.Thematerialofmakingthewheelhaschangedfromwoodtosteel.Itnotonlymakesitpossibleforpeopletomovethethingsmuchheavierthanthemselvesquicklybutalsohelpswiththedevelopmentofseveralkindsoftechnologies.Ibelievetheinventionofthewheelalsomakesthedevelopmentofhumansocietyfaster.Bestwishes!Yours，LiHua名师点睛本文结构如下：1.指出说明对象——车轮的发明。2.围绕要点进行说明：(1)最早出现的时间及地点；(2)制作材料与用途的发展变化；(3)对世界的影响。3.个人评价。文中不仅出现了宾语从句、时间状语从句、过去分词短语作定语、it作形式宾语等复杂句式，还使用了atfirst，notonly...butalso等过渡性词汇，使文章条理清晰，读起来更加流畅。A．写作必记单词1．convenientadj.便利的；方便的；就近的(1)Pleasecometomyassistanceifitisconvenientforyou.(填代词)→Pleasecometomyassistanceatyourconvenience.(同义句转换)(2)Theofficeisfurnishedwithallmodernconveniences(便利设施)．2．passiveadj.被动的；消极的；被动语态的3．seizevt.抓住；捉住；夺；(疾病)侵袭(1)Thechildwasseizedwithalightfever.这个孩子有点发烧。(2)Heseizedthepickpocketbythecollar.(填介词)4．filen．文件；档案；文件夹；vt.提交；将……归档5．freezingadj.冰冻的；严寒的freezingcold极冷的burninghot炽热的6．bearvt.忍受；忍耐；负担(1)Hecan’tbearbeinglaughed/tobelaughed(laugh)at.(2)Bearinmind(记住)thatsuccesscomesfromhardwork.7．currentn．(水或气)流；电流；adj.现在的；当前的currencyn．货币；通货8．associatevt.联想；联系；n.同伴；伙伴Hewasassociatedwiththemurder，sohewasarrested.(同义句转换)→Associatedwiththemurder，hewasarrested.→Associatinghimselfwiththemurder，hewasarrested.9．practicaladj.实际的；实践的；实用的practicevt.&vi.&n．实践；练习B．阅读识记单词10．distinguishvi.&vt.显示……的差别；使……有所不同；辨别(1)distinguishedadj.卓越的；杰出的；著名的；高贵的；有尊严的(2)Distinguishedforhisknowledgeofeconomics，hewaselectedasheadoftheeconomicschool.(填介词)(3)It’simportanttodistinguishrightfromwrong.(填介词)11．mercifuladj.宽大的；仁慈的；慈悲的outofmercy出于仁慈atthemercyof任由……摆布showmercyto/havemercyon同情……12．productn．产品producevt.生产13．abruptadj.突然的；意外的abruptlyadv.突然地；唐突地14．cautionn．小心；谨慎(1)cautiousadj.小心的；谨慎的(2)withcaution小心地15．expectationn．预料；期待；期望(1)beyondone’sexpectation出乎某人的预料(2)Peopleselectnewsinexpectationof(期望；等待)areward.(2015·江苏)16．merryadj.愉快的；高兴的merrilyadv.高兴地；愉快地17．validadj.有效的；确凿的18．ripeadj.熟的；成熟的19．identificationn．鉴定；辨认；确定；身份证明identifyvt.确认；识别；鉴别identifiedadj.被识别的；经鉴定的2...
