1、Unit 4 Isnt It Wonderful?,Passage B The Invention of the Microwave Oven,Review,1. blog 微博 2. electronic products 电子产品3. be out of 不在.4. recharge 充电5. disposable 一次性的.6. programme 程序7. in ones opinion 按照某人的看法,a Microwave oven,？,Who is the inventor of the microwave oven?,Percy Spencer(1894-1970)中文名：珀西
2、.斯本塞 美国人，发明家，微波炉的发明者。,The Invention of the Microwave Oven,New words and Expressions,1. generate 产生 2. high-frequency 高频率的3. melt 熔化 4. engineer 工程师5. curious 好奇的 6. rise( rose , risen ) 增加7. explode( explosion) 爆炸 8. light (lighted/lit, lighted/lit) 照亮9. scientific 科学的 10. conclusion 结论11. exposure
3、暴露 12. thus 因此 13. practical 实际的 14. domestic 家用的15. feed (fed, fed ) 提供（原料）16. intrigue v.引发的好奇心 intrigued 好奇的17. electromagnetic 电磁的,New words and Expressions,1. have no idea 不知道2. get close to 靠近3. pop out 喷出4. be joined by 和.一道5. light up 闪亮，发光6. work on 从事7. large quantities of 大量的8. come on th
4、e market 面市/上市,Fast Reading,When Was the microwave oven invented ?,In 1946,Careful Reading Sum up the important events in the invention of the microwave oven, using the clues on the left.,Notes:,1.Intrigued, Spencer placed popcorn kernels near the electronic tube , soon popcorn was popping out over
5、the lab floor. 好近旁奇之下，斯宾塞将爆米花谷粒放在电子管近旁，很快爆米花蹦的实验室里满地都是。A. intrigued 是形容词，“着迷的，好奇的”。 The boy was intrigued by the legend of dragons. B. pop是动词，“发出砰砰声” The balloon popped when the cat put its paw on it.,Notes:,3 . Engineers went to work on Spencers hot new idea, developing and refining it for practica
6、l use. 工程师们开始忙于斯宾塞的这个新主意，对之进行开发和完善，使之能够具有实际用途。A. work on sth. “努力改善” You should work on your skills in public speaking . 你应该努力提高你公开演讲的能力。B. practical “实际/用的” Thats a clever invention, but not very practical.,Notes:,2. Spencer designed a metal box with a hole into which he fed microwave power. 斯宾塞设计了
7、一个金属盒，在上面开了一个洞，他从这个洞里将微波能导入盒中。 A. feed 喂养 We brought along pieces of old bread and fed the birds. B. 本句中“提供（原料） The fire is dying. Will you feed it with some wood?火快灭了，你能给里面添点儿柴吗？,Careful Reading Read the passage again and choose the best answer,1. Spencers chocolate bar started to melt when it was_
8、. a. near an electronic oven b. far away from an electronic tube. c. near an electronic tube.,Careful Reading Read the passage again and choose the best answer,2. What event confirmed Spencer that microwave energy could cook food quickly? a. The exploding egg. b. The popcorn kernels . c. The colleag
9、ue .,Careful Reading Read the passage again and choose the best answer,3. What did Spencer feed into the metal box besides food? a. High pressure. b. An electromagnetic field . c. Microwave power,Careful Reading Read the passage again and choose the best answer,4. What happened when food was placed
10、in the box and microwave energy was fed in ? a. The temperature of the food rose. b. The temperature of the food remained the same . c. The temperature of the food dropped., Sum up,1. Words and Expressions 2. Time 3. Inventor4. Procedures,1. Finish the related exercise on the exercise-book . 2. Try your best to remember the words and expressions appeared during our class.,Homework :,Thanks,
