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单击鼠标编辑标题文字格式,单击鼠标编辑大纲文字格式,第二个大纲级,第三大纲级别,第四大纲级别,第五大纲级别,第六大纲级别,第七大纲级别,单击鼠标编辑标题文字格式,单击鼠标编辑大纲文字格式,第二个大纲级,第三大纲级别,第四大纲级别,第五大纲级别,第六大纲级别,第七大纲级别,单击鼠标编辑标题文字格式,单击鼠标编辑大纲文字格式,第二个大纲级,第三大纲级别,第四大纲级别,第五大纲级别,第六大纲级别,第七大纲级别,单击鼠标编辑标题文字格式,单击鼠标编辑大纲文字格式,第二个大纲级,第三大纲级别,第四大纲级别,第五大纲级别,第六大纲级别,第七大纲级别,单击鼠标编辑标题文字格式,单击鼠标编辑大纲文字格式,第二个大纲级,第三大纲级别,第四大纲级别,第五大纲级别,第六大纲级别,第七大纲级别,单击鼠标编辑标题文字格式,单击鼠标编辑大纲文字格式,第二个大纲级,第三大纲级别,第四大纲级别,第五大纲级别,第六大纲级别,第七大纲级别,单击鼠标编辑标题文字格式,单击鼠标编辑大纲文字格式,第二个大纲级,第三大纲级别,第四大纲级别,第五大纲级别,第六大纲级别,第七大纲级别,单击鼠标编辑标题文字格式,单击鼠标编辑大纲文字格式,第二个大纲级,第三大纲级别,第四大纲级别,第五大纲级别,第六大纲级别,第七大纲级别,Unit 20 New Frontier,lead-in,1.algebra,/ldbr/,n,U,代数学,;,代数,.,branch of mathematics in which letters and,symbols are used to represent quantities,2.geometry,/dmitr/,n,U,几何（学）,branch of mathematics,dealing with the properties and,relations of lines,angles,surfaces,and solids,Warm up,bacteria,/bktr/n pl(sing-ium/-m/,bacterium,)细菌.,virus,病毒,4.software,n,U,软件,data,programmes of a computer when operating it.,hardware,硬件,病毒没有细胞结构，必须依赖其他活细胞才能生活；,细菌有细胞结构，单个细胞生活,5,mass,/ms/,n,质量；团；块；,大量,（,a mass of/masses of,）,Density is the relationship between mass and volume.,密度是质量与体积间的关系。,There were,masses of,people in the shop yesterday.,昨天商店里人如潮涌。,There is,a huge mass of,work to be done.,有许许多多的工作要做。,mass media,大众传媒,the masses,群众；平民百姓,【,拓展,】,【单项选择】,He has _letters to answer.He has to work from dawn to dark.,A,much,B,a great deal of,C,masses of,D,the number of,【答案】,C,当集合名词如,crew,audience,class,family,等作主语时，,若作为一个整体看待，谓语用单数；,若着眼于组成该集体的成员或个体时，谓语用复数。,【,拓展,】,The crew on board the steamer,was,small.,在这艘汽船上的船员为数很少。,The crew,were,busy preparing.,机组人员正忙着做准备。,6,crew,n,全体机组人员,;,（轮船,飞行器,钻井平台等上的）,工作人员,.,The plane crashed,killing all its passengers and crew.,飞机失事，所有乘客和机组人员都遇难了。,用,be,动词的适当形式填空,The Wang family _moving to the south soon.,The crew _paid to do all the work on the ship.,It was late,but the audience _ increasing.,【答案】,is,are,was,7,assist,v,(,fml,),help,帮助；协助；援助,(1)assist(sb.)with sth.,在某事上帮助,(,某人,),assist(sb.)in doing sth./to do sth.,帮助,(,某人,),做某事,(2)assistant,n,助手；助理,shop assistant,(3)assistance,n,帮助；援助,I was employed to,assist,the manager with her duties.,我受雇协助经理工作。,Some of the guests,assisted,with the preparation of the food.,一些客人帮着准备食品。,【单句语法填空】,With the _(assist)of my English teacher,Ive made rapid progress in English.,这个公司生产,Oshbot,机器人来帮助商店里的顾客。,The companys“Oshbot”robot is built _ _ customers in a store.,汤姆累了，但是没有人帮助他做这项工作。,Tom was tired,，,but no one _ him,_,_ his job.,【答案】,assistance,to assist,assisted,；,in doing/to do,用,assist,的正确形式填空。,_ by an expert in the field,we soon found a solution to the problem.,My warmhearted neighbours always come to our _ every time we get into trouble.,Professor Smith,along with his five _,，,is working on the project day and night to meet the deadline.,Assisted,assistance,assistants,futurology,The study about predictions,of future developments.,-ology,学问；科学,biology,生物学,geology,地质学,archaeology,考古学,未来学,Lesson 1,futurolog,ist,fju,:,trldst,未来学家,scient,ist,art,ist,special,ist,.,2,latter,n,&,adj,.,后者；后者的；末期的；后期的,In the 18th and 19th centuries,especially the,latter,the most common theme in science fiction novels was the future.,在,18,世纪和,19,世纪，尤其是后者科幻小说中常见的主题小说是未来。,Ken and Mary came,the,latter,wearing a red dress.,肯和玛丽来了，后者,(,玛丽,),穿着红色的连衣裙。,【汉译英】,John,和,James,是兄弟。前者是教师，后者是工程师。,【答案】,John and James are brothers.The former is a teacher,the latter is an engineer.,the former,.the latter,前者,.,后者,【,拓展,】,【活学活用】,用late,later,latest,latter与lately填空。,(1)What have you been doing _？,(2)He often sits up _ playing online games.,(3)_ we learnt that this wasnt true at all.,(4)The story happened in the _ 19th century.,(5)You have to return the book by Friday at the _.,(6)Two days _，we proved these facts to be correct.,(7)Of the two,the_ is far better than the former.,lately,late,L,ate,r,l,ate,l,ate,s,t,l,ate,r,latter,3.Which is much,hand,ier,or easier to carry?,handy,convenient,方便的,desktop computer,laptop,4,shortly,adv,.,in a short time;not long;soon,不久；很快；立刻,Ms Jones will be back shortly.,琼斯女士很快就会回来。,The accident happened shortly before midday.,事故是在正午前不久发生的。,shortly after,在,之后很快,shortly before,在,之前不久,【,拓展,】,【句型转换】,Will you come here in a short time?,Are you coming here _,？,The firefighters arrived shortly after the fire broke out.,The firefighters arrived _ the fire broke out.,【答案】,shortly,soon after,5.,download,vt,.,下载,We will be able to,download,any files or,update,our computers.,我们能够下载任何档案材料或更新我们的电脑。,Games can be,downloaded,free from the Internet.,(,翻译成中文,),可以免费从网上下载游戏。,6.update,vt,.,bring(sth)up to date;modernize,更新,update production methods/computer systems,更新生产方法,/,计算机设备,.,The files need,updating,.,档案需要更新。,The library will,update,the files of the book every month.,图书馆将会每月更新书籍档案。,The software against the viruses should be _ once a week.,A.updated B.renewed,C.repaired D.got,stain,n.,污迹,stainless,adj.clean,worn,adj.,磨破了的,不锈的,9,garment,/gmnt/,n.,(fml)an article of clothing,服装；,（一件）衣服,:,a strange shapeless garment 怪模怪样的衣服,garment,(,单复数,),包括各种衣服，如时装等，还有设计等意思在内。在美国，如果说,服装,厂，一定是用garment fa
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