摘要:Step1 Warming-up [教学思路]:通过自我介绍.引出野生动物.再通过观看视频“wild animals 片段.让学生接触一些可爱的野生动物.并问学生们喜欢的动物.从而让学生猜一猜我最喜欢的动物. Watch it and try to answer my question. Ok? What animals can you see? Students give answers,-. T: Do you like animals? S: Yes, I do. T:What’s your favourite animal? S: My favourite animal is - Guess a riddle. I am a little fat but I am lovely. I have black and white fur. I only live in China. My favourite food is bamboo shoots and leaves. Who am I? [设计意图及信息技术运用]:通过观看流媒体.培养学生在特定环境中领悟使用语言的能 力.拓宽视野.获得乐趣.并自然地呈现出新词汇.这样不但复习了上一节课关于大熊猫的 知识.又巧妙创设了课堂学习气氛,而且有利于调动学生的学习情绪.在创设情景过程中导 出“任务 . 在这一设计中媒体的作用在于“创设情景.引发动机 .是通过“设疑-播 放-讲解 得以实现. Step2 Learning some vocabulary about wild animals [教学思路]:通过图片呈现.让学生认识野生动物并恰当的利用图片信息引出“Where does -live? What does it eat? 在学生有了一定的语言输入后.出现了不同形式的语段.让学生把听懂的说出来.1. T: We know there are many wild animals in the world. I’d like to show you more pictures about animals. Let’s go and see them, Ok? Show three animals: dolphin giraffe monkey

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  Is the world warming up? According to many reports the answer is yes.Eleven of the hottest years since 1850 appeared between 1995 and 2006.Last year, the United Nation’s Intergovernmental Panel on Climate Change(IPCC)reported the earth was about 0.75℃warmer than it was in 1850.While this doesn’t sound like a lot, a small difference in average(平均)temperature can make a big difference in climate(气候).During the last ice age, the planet was only about five degrees colder than now.

  It’s all about the speed at which temperatures are changing.In the past, temperatures moved up or down step by step.But in the 20th century, especially since 1976, temperatures have likely risen more quickly than during any century in the last 1,000 years.Warming may bring improved harvests(收获)to northern countries such as Canada and Russia.However, many species(物种)won’t like these conditions.They begin moving towards cooler places and cause lots of trouble to human world.

  The IPCC reported that human activity is very likely responsible(负责任的), by increasing the greenhouse effect(效应).Some gases cause the air to take in heat energy.Without the greenhouse effect, the earth’s average temperature would be -18℃ rather than the present comfortable 14.6 degrees.The main greenhouse gases are carbon dioxide(CO2), water vapor(蒸汽)and some other gases.Burning oil, coal and waste adds to the Carbon dioxide, and it has increased 35%since 1850.

  Many researchers have found that natural forces alone don’t explain the temperature increases over the last 30 to 40 years.Their study shows that as carbon dioxide goes up, temperatures will rise too.But some scientists don’t agree.They think the effect of human produced greenhouse gases is very small compared to the normal changes that the climate causes.

  When asked whether humans are causing the world warming, Carl Wunsch, a professor at the Massachusetts Institute of Technology says,“It seems very likely from what I’ve seen.Is it 100%sure?No.There’s something to do with natural changes.”Does that mean we should have a“wait and see”attitude(态度)?Not according to Wunsch.He points out we buy house insurance(保险)not because we are sure our homes will be on fire, but because it’s a danger we’d rather avoid.

(1)

The writer’s purpose here is ________.

[  ]

A.

to introduce a scientific study

B.

to report a serious problem

C.

to teach an important subject

D.

to describe an unusual fact

(2)

What’s the earth’s average temperature in 1850?

[  ]

A.

0.75℃.

B.

-18℃.

C.

14.6℃.

D.

13.85℃.

(3)

Which of the following is responsible for the earth’s warming up?

[  ]

A.

Human activities rather than natural changes.

B.

Natural changes rather than human activities.

C.

Both human activities and natural changes.

D.

Neither natural changes nor human activities.

(4)

What’s the best thing we should do next?

[  ]

A.

Wait for new scientific findings.

B.

Work hard on further study.

C.

Leave things as they normally are.

D.

Take more action and talk less.

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What do you think life on earth will(A)________in 100 years? More comfortable ?More high-tech? Maybe. But many scientists see a different future. (B) They say that by the year 2100 the earth will become a worse place for us to live.

   Greenhouse gases like carbon dioxide(二氧化碳)are warming up the earth, melting(熔化)ice, and raising the level of the oceans. All these changes may bring more disasters( 灾难),including earthquakes and floods( 洪涝).

   Sounds scary, doesn’t it? Luckily, things may become so bad. Most countries in the world have agreed to slow down earth warming.

   In February, the Kyoto Protocol (京都议定书)began.(C) 这是全世界141个国家间的协议。 They want to produce less greenhouse gas and slow the rising temperature. (D) By 2010,35 developed countries will cut greenhouse gas by 5 percent of the amount they produced in 1990. (E) In order to produce less greenhouse gas, countries have to use cleaner cars and fewer coal power stations. They also need to look for new types of energy(能源).Countries that signed the agreement include China, Japan, Russia and the countries in the European Union( 欧盟).

1.在(A)的空白处填入一个适当的词语:________________

2.将划线部分(B)译成汉语:___________________________

3.将划线部分(C)译成英语:________________________

4.将划线部分(D)译成汉语:______________________________

5.将划线部分(E)改写为:Countries have to use cleaner cars and fewer coal power stations _____________they can produce less greenhouse gas.

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