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(Teacher shows the screen and deals with them with the whole class.) engineering /,endVI′nIErIN/ n. 工程;工程学;设计;建造 solar /′sEJlE(r)/ adj. 太阳的;日光的 significant /sIɡ′nIfIkEnt/ adj. 意义重大的;重要的;有意义的 mankind /,mAn′kaInd/ n. 人类 △Neil Armstrong /′ni:l′B:mstrEBN/ 尼尔·阿姆斯特朗(美国宇航员) △Alexander G Bell /,AlIg′zB:ndE′dVi:′bel/ 亚历山大·贝尔(美国发明家) △Ray Tomlinson /′reI′tBmlInsn/ 雷·汤姆林森(美国计算机工程师) constitution /kCnstI′tju:Fn/ n. 宪法 △eureka /jJE′ri:kE/ interj. 我找到了! CStep Ⅱ Warming up T:Now,please tell us what scientific achievements you think have changed the world? Ss:Electricity,cars,aeroplanes,telephones,radio and television. T:Anything else? Ss:The Theory of Gravity,the Internet,solar energy… T:Quite right.Besides,some other ones like genetic engineering and cloning are also changing the world. (Teacher writes all the scientific achievements mentioned above on the blackboard and says the following.) T:Now,please look at the blackboard and tell which one do you think is the most significant?And why? S1:I think electricity is the most significant,because it is a basic part of nature and it is one of our most widely used forms of energy. S2:I think solar energy is the most significant,because it helps us save lots of natural sources of energy like coals,electricity,natural gas and oil. S3:I think cars and aeroplanes are the most significant.They make the world a smaller place,which makes many things easy to do. S4:I think the achievement of Genetic Engineering is significant.Not only has it given a glimpse into the extraordinary complexity of the structure of human DNA but it has also demonstrated the huge potential of cooperative scientific endeavour organized on an international basis.It has already produced important medical breakthroughs. Ss:… T:Wonderful.You all did a good job.Are there any other scientific achievements that you think are important?What are they? Ss:The invention of steam engine,the discovery of “uranium” the invention of computer,the invention of telephone… T:Do these achievements have anything in common? Ss:Yes. T:What do they have in common? Ss:They are all important and useful for the development of mankind and society. T:That’s right.Next,let’s do some listening about scientific achievement. (责任编辑：admin) |