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1、单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,*,本资料仅供参考，不能作为科学依据。谢谢。本资料仅供参考，不能作为科学依据。本资料仅供参考，不能作为科学依据。谢谢。不能作为科学依据。,unit 5 The Villain in the Atmosphere,Isaac Asimov,1/17,There is one gas present in the air we breathe that,is,essential,to,life.Unfortunately,one can have too much of a good thing and t
2、he growth in,carbon dioxide,threatens,to,warm up,our planet to,a dangerous extent,.Isaac Asimov,introduces,us,to,this,villain,in the atmosphere,explaining how it works and what can be done about it.,2/17,The villain in the atmosphere is carbon dioxide.,It,does not,seem to,be a villain.It is not very
3、poisonous,and it is present in the atmosphere in so small a quantity-only 0.034 precent-that it,does,us,no,harm,.,3/17,Whats more,that small,quantity of,carbon dioxide in the air is essential to life.Plants absorb carbon dioxide and,convert,it into,their own,tissue,which,serve as,the basic food,sup
4、ply for,all of animal life(including human beings,of course).In the process they,liberate,oxygen,which is also necessary for all animal life.,4/17,essential,Essential,:a.absolutely necessary;extremely important,必不可少；非常主要；必需，基本,Food is essential to life.,食物是维持生命不可或缺。,Her most essential quality is kin
5、dness.,她最主要品质是厚道。,essential,necessary,requisite,都含有“必要”意义，能够相互通用；但,essential,语气最强，表示“必不可少”，,necessary,次之，,requisite,语气最弱。,n.,要素，关键点,One of the essential for success is diligent.,成功要素之一是勤奋。,5/17,introduce to,introduce.to.,把,.,介绍给,.,He introduced his friend to me.,他把他朋友介绍给我,。,6/17,threaten,threaten,:,
6、威胁，恫吓，预示,.,恶兆，使有,.,危险,His father threatened to beat the boy if he stole again.,男孩父亲威胁他说假如他再偷东西话，就要揍他。,7/17,poisonous,poisonous,:a.containing or producing poison 1有毒，有害，恶毒,This medicine is poisonous if taken in large quantities.,这种药若服用过量是有害,。the remaining poisonous influence 余毒 be poisonous to sbs mi
7、nd 对某人思想有害 a poisonous rumor 恶毒谣言 give sb.,a,poisonous look 恶狠狠地看某人一眼2 讨厌，令人不悦，使人无法忍受,The heat is simply poisonous.,热得令人无法忍受。,8/17,poison,Poison,:n.1 毒药，毒物,u,se poison as an antidote(解毒剂)to poison 以毒攻毒,drink poison to quench(抑制)ones thirst,饮鸩止渴,2【作定语】poison gas 毒气 a poison pen 写匿名信人 3vt.使中毒，放毒于，毒杀，毒
8、害，伤害,Some one tried to poison our dogs food.,有些人企图在狗食中下毒。,poison sbs mind 毒害某人思想 poison the friendship of 破坏.情谊4a.hate each other like poison 相互恨透,Whats your poison?,(口)你要喝点什么？,9/17,do harm,d,o(sbs)harm,:cause damage or injury to(sb.)对（某人）造成损害（或伤害）,Staying up does,us,harm.,熬夜对我们健康造成伤害。,10/17,whats m
9、ore,whats more,而且,He is a tractor driver and,whats more a good sportsman.,他是一个拖拉机手，而且还是一个好运动员。,11/17,convert,convert:,v.change from one form or use to another(,使,),转变,(,使,),变成，变换，常与,into,连用,That building has been converted into a shool.,那座楼改成学校了,。,convert coal to gas,将煤转化为煤气,12/17,tissue,tissue,:n.S
10、ubstance that animal and plant cells are made of;piece of soft thin paper used esp.for wiping your nose,组织，手巾纸，薄包装纸，棉纸,She used paper tissues to blow her nose.,她用棉纸擤鼻子。,a tissues of lies,一整套谎话,13/17,serve as,serve as,:vt.be used for a particular purpose,起,.,作用，被用作，作,.,之用，,The sofa served the boy as/
11、for a bed.,那张沙发用作男孩床。,Vi.,可作,.,之用,The box served as a table.,那只箱子用作桌子,。,This tool served for many purposes,.,这件工含有很多用途。,14/17,supply for,supply for,:vt.1,供给，提供,The school supplies book for/to the children.,学校提供孩子们书籍,。,2,补充，满足,Its hard to supply the demand for more and better houses.,要满足人们对于更多更加好房子需求是极难。,3,供给量，,【,惯用复,】,What supplies will we need for our mountain climb?,我们登山需要那些生活用具？,15/17,liberate,liberate,:vt.free(sb./sth.)from a situation in which they are restricted in some way,释放，解放，解救,liberate slaves,解放奴隶,His hometown was liberated in 1948.,他故乡是在,1948,年解放。,16/17,谢谢,17/17,
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