3、设函数定义在实数集上，它的图象关于直线对称，且当时，，则有(　　 )

2、已知等比数列满足，则

1、函数的定义域为(　　 )

5.Give a sample writing

One possible version:

Dear Nicolaus Copernicus,

　　 I am a student studying astronomy and I would very much like to read your new theory about the solar system. I hope you will publish it for several reasons.

　　 I understand the problems with the present theory. The way the planets move is not what you would expect if the earth was the certre of the universe. It is also odd that the brightness of some stars seems to change. So I agree with you that we need a new theory.　　　　

I know your observations have been very carefully carried out over many years. Now you must have the courage to publish them. Science can never advance unless people have the courage of their beliefs. I know you worry about what will happen if you publish your new theory. No matter how people oppose it, time will show if your ideas are right or wrong.

　　 So I hope you will feel you can publish your new theory.　　　　　　　

　　　　　　　　　　　　　　　　　　　 　　　　　　　　　　Yours sincerely,

　　　　　　　　　　　　　　　　　　　　 　　　　　　　　　　Zhang Hua

Step 4. Homework

1 　Revise the composition and hand it in tomorrow.

2 　Revise the language points for tomorrow’s quiz.

Period 7

Step 1 Quiz

　Finish then check the answers

Step 2 Exercise checking

Step 3. Talking 　(P41)

　 Imagine you are going to meet your pen-friend at the weekend party. You both need a description of the other so you can recognize each other when you meet. Now ring your pen-friend to sort out the necessary information.(Pair work) Making a telephone call---refer to the expressions on P42

Step 4. Summary to Unit 1

　 Finish the summing up chart on P8

4. Get several Ss to read their writing to the class, T gives some comments

3. Offer a period of time for Ss to write a draft

2. Writing Task: P7. Ex 3. (write a short letter asking Copernicus to publish his ideas so everyone can read them)

Go over the steps and try to follow them (P7-8)

1. Please refer to P8 Learning Tip

1. Fast reading: Listen to the tape, and find out the answers to the questions.

1). What did Copernicus think was the center of the solar system?

2). When did Copernicus publish his theory?

3) Why didn’t Copernicus publish his theory before he died?2. Reading comprehension

P7. 1.Use the reading to help you draw the two theories of the universe.

Before Copernicus’ theory

A diagram showing the solar system with the earth at its centre

Showing Copernicus’ theory

A diagram showing the solar system with the sun at its center

Step 3. Persuasive writing

2. Background

Nicolaus Copernicus was a Polish astronomer (1473-1543). Born in Torun, he began his university studies in Krakow in 1491, where he studied canon law and Latin and Greek classics. However he also had an interest in mathematics and astronomy. After obtaining his degree of Doctor of Canon Law (教会法规博士学位)in Italy in 1503, Copernicus returned home to Warmia in Poland to serve as Canon (=priest) .

　　 In 1530, Copernicus completed　 his great work De Revolutionibus (《天体运行论》).Copernicus knew that these findings would lead him into trouble with the Roman Catholic Church (罗马天主教教徒), so he wasin no hurry to publish his theory. He only published it as he lay dying in 1543.

Though Copernicus did not live to hear of its extraordinary impact, the book which first suggested that the Sun, not the Earth, is the centre of the universe is now recognized as one of the most influential scientific works of all time.

3 Get Ss to give the names of the nine planets of the solar system .

Mercury　 Venus　　　 Earth　　 Mars　 　Jupiter　　 Saturn　 Uranus　　 Neptune　 　Pluto

Can you use a good method to memorize them ?My Very Easy Method: Just Set Up Nine Planets

Step 2 Reading ----Copernicus’ Revolutionary Theory (P6-7)