2022年高中英语unit1talesoftheunexplainedwelcome精品教案牛津译林版必修 .pdf

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1、Unit 1 Tales of the unexplained Part 1: Teaching Design Aims and requirements ? Read a news story about a missing boy and a magazine article about Yeti ? Listen to a dialogue between a boss and his employee ? Talk about aliens and conduct an interview ? Write a report ? Tell a mysterious story Proce

2、duresWelcome to the UnitStep 1: Brainstorming1. Boys and girls, have you ever heard something not only interesting and attractive but also unexplained at all even with the help of modern science and technology in the world? Here are some pictures on the screen. Can you tell me what they are? The cha

3、nces for seeing a UFO are greater for those people who live in small towns or in the country and are outside late at night. UFOs. Yes, they are called UFOs, meaning unidentified flying objects.UFOs come in all shapes and sizes. Some are only small spots of light that move in strange patterns across

4、the night sky. Some can be seen in the daytime are often disk- or saucer-shaped.UFOs were once seen in different parts of China. Look at some pictures on the screen, please. Do you think such kind of things mysterious ? Are you curious about them? Besides UFOs, can you list anything more unexplained

5、 youve ever heard or seen in your daily life? They are Yetis, the Loch Ness Monster, Stonehenge and the Pyramids in Egypt. 2. Open your books and let s look at page one. Please read the instruction and focus on the five pictures and illustrations first. Then answer the following questions: Do the fi

6、ve pictures have something in common? If so, what is it? (unexplained; no satisfactory answers; mysterious; no evidence.) Can scientists explain these phenomena? How do you feel about them? Are you a bit curious? 3. Think of as many expressions as possible to answer the questions above. Try to make

7、up some sentences and read them to the class. I will also offer you some examples. They are mysterious because no satisfactory answers have been offered to explain them. Though these mysteries have puzzled people for a long time, they still show great interest in them. 精选学习资料 - - - - - - - - - 名师归纳总

8、结 - - - - - - -第 1 页，共 6 页People feel puzzled by the mysteries. 4. Report the information you have collected to the class. Your answers are quite different. Now we will use some of your answers as a prompt for a class discussion. For example, Teacher: What information have you got about UFOs? Studen

9、t A:. Teacher:Do you think Student As information interesting? What about the information youve got? Is there anything different? Student B :. 5. Please discuss the topics in pairs. Here are some questions. About UFOs:Have you ever read some reports about UFOs in China? Are you interested in UFOs? A

10、re they really from another planet? What do the letters UFO stand for? Why do you think UFOs visit our planet? About Yetis:Where are the Himalayas? Whats the weather like there? Why do some people make great efforts to climb them? (hobby; dream; challenge themselves; make discoveries; overcome diffi

11、culty,.) A Yeti is reported to be half-man and half-beast. Have you heard of it? Do you think some climbers disappearances are connected with Yetis? About Stonehenge, the pyramids and the Loch Ness Monster:Stonehenge and the pyramids in Egypt, the most famous of which is the Great Pyramid, are cultu

12、ral relics.Where were the pyramids built, on the east coast of the Nile or on the west coast? What are the reasons? Do you think the Great Pyramid is a wonder in human history? How was the Great Pyramid built? I havent heard of Stonehenge or the Loch Ness Monster. They are a bit new to me. What abou

13、t you? Would you be interested in discovering more about them? Step 2: Sharing information1. Let s deal with the questions in pairs. For the first question, you may discuss it this way: Do you believe in UFOs? What might be the most acceptable explanation for UFOs? You may give different answers suc

14、h as: -Aliens from space. -Military test aircraft. -Some UFOs are alien, some are test aircraft. -UFOs are evidence of human space travel. -UFOs are neither alien nor test aircraft. -UFOs dont exist. You can express your agreements and disagreements with each other. 精选学习资料 - - - - - - - - - 名师归纳总结 -

15、 - - - - - -第 2 页，共 6 页2. Summarize your answers and then report to the class. Sample answers1. I have a firm belief in UFOs. In fact, I have seen a few myself. UFO stands for Unidentified Flying Object, that is, an object, apparently moving in the sky, which we cannot identify. However, if you ask

16、me whether or not I believe in spacecraft carrying visitors from outer space, I would have to say no. I do not believe in them. 2. The continent of Antarctica was discovered in 1818. It was once supposed to have been covered by ice for hundreds of thousands of years. However, in 1949 scientists took

17、 samples from sediment deep beneath Antarctica, which revealed that great rivers had once flowed into Antarctica until about 6,000 years ago, Many more mysteries remain to be discovered. 3. Im always interested in the stories of UFOs and aliens. And I hope I will have the chance to meet one some day

18、. If it really happens to me, I will ask questions such as Who or what are you?, Where are you from? and How long does it take to travel from your place to our planet?. I will try my best to communicate with them, discovering what their life is like and why they have come to the earth. UFOs UFO stan

19、ds for Unidentified Flying Object. According to some witnesses, it is colorless and moves at a slow, steady speed with little noise. The Loch Ness Monster Loch Ness is a big lake in Scotland. Nessie, the Loch Ness Monster, was sighted as far back as the 6th century AD. Yetis The Yeti has been called

20、 the missing link; half-man, half-beast. It is supposed to live in the highest mountain in the world-Mount Qomolangma. Stone-henge Being one of Britains greatest national icons, it stands for mystery and power. Some people guess that it was a temple for worship. The reason why Stonehenge was built r

21、emains unknown even today. The Great Pyramid The Great Pyramid of Khufu is one of the seven wonders of the ancient Great world and the only one people can visit. It is the greatest of the Egyptian pyramids, which served as burial places for the Pharaohs. 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -

22、第 3 页，共 6 页第十三章：干燥通过本章的学习， 应熟练掌握表示湿空气性质的参数，正确应用空气的 HI图确定空气的状态点及其性质参数；熟练应用物料衡算及热量衡算解决干燥过程中的计算问题； 了解干燥过程的平衡关系和速率特征及干燥时间的计算；了解干燥器的类型及强化干燥操作的基本方法。二、本章思考题1、工业上常用的去湿方法有哪几种？态参数？11、当湿空气的总压变化时，湿空气H I 图上的各线将如何变化 ? 在 t、H相同的条件下，提高压力对干燥操作是否有利? 为什么? 12、作为干燥介质的湿空气为什么要先经预热后再送入干燥器？13、采用一定湿度的热空气干燥湿物料，被除去的水分是结合水还是非结合水

23、？为什么？14、干燥过程分哪几种阶段？它们有什么特征？15、什么叫临界含水量和平衡含水量？16、干燥时间包括几个部分？怎样计算？17、干燥哪一类物料用部分废气循环？废气的作用是什么？18、影响干燥操作的主要因素是什么？调节、控制时应注意哪些问题？三、例题例题 13-1： 已知湿空气的总压为101.3kN/m2,相对湿度为 50%， 干球温度为 20oC。试用 I-H 图求解：(a)水蒸汽分压 p；(b)湿度；精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 4 页，共 6 页(c)热焓；(d)露点 td；(e)湿球温度 tw；(f)如将含 500kg

24、/h 干空气的湿空气预热至117oC，求所需热量。解：由已知条件： 101.3kN/m2，050%，t0=20oC 在 I-H 图上定出湿空气的状态点点。(a)水蒸汽分压 p 过预热器气所获得的热量为每小时含 500kg 干空气的湿空气通过预热所获得的热量为例题 13-2：在一连续干燥器中干燥盐类结晶，每小时处理湿物料为1000kg，经干燥后物料的含水量由40%减至 5%（均为湿基），以热空气为干燥介质，初始湿度 H1为 0.009kg 水?kg-1绝干气，离开干燥器时湿度H2为 0.039kg 水?kg-1绝干气，假定干燥过程中无物料损失，试求：（1） 水分蒸发是 qm,W（kg 水?h-1

25、） ；（2） 空气消耗 qm,L（kg 绝干气? h-1） ；原湿空气消耗量 qm,L（kg 原空气?h-1） ；精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 5 页，共 6 页（3）干燥产品量 qm,G2（kg?h-1） 。解：qmG1=1000kg/h, w1=40, w2=5% H1=0.009, H2=0.039 qmGC=qmG1(1-w1)=1000(1-0.4)=600kg/h x1=0.4/0.6=0.67, x2=5/95=0.053 qmw=qmGC(x1-x2)=600(0.67-0.053)=368.6kg/h qmL(H2-H1)=qmw7.12286009.0039.06.368HHqq12mwmLqmL =qmL(1+H1)=12286.7(1+0.009)=12397.3kg/h qmGC=qmG2(1-w2) h/6kg.63105. 01600w1qq2mGCmG2精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 6 页，共 6 页