职业学校英语第四册文PPT课件

1、第一段课文和词组 percy spencer had no idea what might happen when he brought candy with him into his microwave lab in 1946.when the American engineer let his chocolate bar get too close to an electronic tube that generated high-frequency radio waves,it started to melt. microwave 微波 makr()wev 过去式 microwaved

2、过去分词 microwaved 现在分词 microwaving engineer 工程师 endn generated 发生的den,retd high-frequency 高频率的；高周波的haifri:kwnsi第1页/共8页第一段语法let sb do sth(让某人做某事）let out 放掉 ; 发出 ; 泄露 ; 放走 let down 放下 ; 使失望 ; 降低 ; 放低 let alone 更别提 ; 更不用说 ; 不干涉 ; 不打扰 when the American engineer let his chocolate bar get too close to an el

3、ectronic tube that generated high-frequency radio waves,it started to melt 当美国工程师让他的巧克力太接近电子管产生高频无线电波,它开始融化 本句中，when引导了一个状语从句，其中有一个用that引导的定语从句that generates high-frequency radio waves，该从句修饰tube第2页/共8页第二段课文和词组IntriguedIntrigued,spencer placed,spencer placed popcorn popcorn kernels kernels near the e

4、lectronic near the electronic tubetube,soon ,soon popcorn was popping out over the lab floor.the next moring,spencer popcorn was popping out over the lab floor.the next moring,spencer decided to put the electronic tube near an egg.spencer was joined by a decided to put the electronic tube near an eg

5、g.spencer was joined by a curiouscurious colleague,and they both watched as the egg began to shake. colleague,and they both watched as the egg began to shake.the the rapid temperature rapid temperature rise rise within the egg was causing within the egg was causing tremendous tremendous pressurepres

6、sure,the curious colleague moved in for a closer look just as the ,the curious colleague moved in for a closer look just as the eggegg exploded exploded and and splashed splashed all over his amazed face.the face of spencer all over his amazed face.the face of spencer lit up with a lit up with a log

7、ical scientific conclusionlogical scientific conclusion:the melted candy bar,the :the melted candy bar,the popcorn,and now the exploding egg,were all caused bypopcorn,and now the exploding egg,were all caused by exposure exposure t to o microwave energy.microwave energy.thusthus,if an egg can be coo

8、ked that quickly,why not ,if an egg can be cooked that quickly,why not other foods? other foods? Intrigued 好奇的；被迷住了的 ntridpopcorn 爆米花，爆玉米花 ppknkernels 核心程序，核心 knl (kernel的复数形式） tube 电子管 tjub 过去式 tubed 过去分词 tubed 现在分词 tubing curious 好奇的 kjrs 比较级 more curious 最高级 most curioustremendous 极大 trmends 比较级

9、more tremendous 最高级 most tremendousexploded 爆炸了的 kspldd （explode的过去分词）splashed 散点 spltlogical 合逻辑的 ldk()l 比较级 more logical 最高级 most logical scientific 科学的 santfk 比较级 more scientific 最高级 most scientific conclusion 结论 knklu()nexposure 暴露 ksp; ek-第3页/共8页第二段语法 decide on决定；选定 decide for 作对有利的决定；赞成做某事 dec

10、ide to do 决定做某事 the rapid temperature rise within the egg was causing tremendous pressure鸡蛋内的温度迅速升高，造成巨大的压力本句中，rise是名词，the rapid temperature rise within the egg修饰rise，谓语是was causing tremendous pressure第4页/共8页第三段课文和词组 spencer designed a spencer designed a metal metal box with a box with a holehole in

11、to which he fed into which he fed microwave power .microwave power .the energy enering the box was unable to the energy enering the box was unable to escape,thus creating an escape,thus creating an electromagnetic electromagnetic field when food was field when food was placed in the box and microwav

12、e energy fed in,the temperature of placed in the box and microwave energy fed in,the temperature of the food rose very the food rose very rapidly.rapidly.Dr.spencer had invented the microwave Dr.spencer had invented the microwave ovenoven metal metal 金属；合金 met()l 过去式 metalled或-aled 过去分词 metalled或-al

13、ed 现在分词 metalling或-aling hole hole 洞 hl 过去式 holed 过去分词 holed 现在分词 holing electromagneticelectromagnetic adj. 电磁的 rapidly adv. rapidly adv. 迅速地；很快地；立即 rpdl 第5页/共8页第四段语法 make use of make use of 使用，利用使用，利用 in use in use 在使用中在使用中 use in use in 用于；用于；的效用的效用 use for use for 某物有什么作用；用于某物有什么作用；用于 engineers went to work on spencers hot new idea,developing and refinin