1、人教课标 高二 必修 5 Unit 1,Listening on Page 41,Unit 1 Great scientists,Robert Briggs is very interestedin biology and especially in the study of plants. Today he is telling his friend Zhang Wei some exciting news. Before you listen to the tape discuss with your partner how you would find out the name of a
2、 flower.,New words in the listening passage:species 种类parrot 鹦鹉blackbird 乌鸦,Now listen to the tape. 1. Which of the following statements describes what this listening passage is about? Give your reasons.,A. This is about a man who wants to name a flower.B. This is about a man who finds a flower and
3、wants to own it. C. This is about a man who finds a flower and wants to know if it is a new species of flower.,It does not give enough information.,B is inaccurate.,Listen to the tape again and complete the following passage.To find the name of an unknown flower first you should ask your _ teacher t
4、o help you. He /She will look in a special _ written by Carl Linnaeus. He lived in _ from _ to _.,biology,book,Sweden,1707,1778,He was very important because he solved a _ problem for biology.,serious,Listen to the tape for the third time and answer these questions.,1. If Robert Briggs finds the flo
5、wer in the book, what does that mean? It means that his flower has already been identified and has a name.2. How would he know if his lily is a new species?He would know by checking his lily against other lilies in the specialist book. If his lily is different it will be a new species.,3. Why do pla
6、nts all have two names?All plants have two names just like people. The first is the group of flowers they belong to and is like the family name. The second is the kind of flower within that group and is like a given/personal name.,4. What was the serious problem for biology that Linnaeus solved?Befo
7、re Linnaeus there was no way of finding out whether a plant was new or not. This caused problems because different scientists claimed that they had found and named flowers first. After he organized his system it was easy to discover whether a plant was new or not and so who had the right to name it.
8、,Listening Task,on Page 44,Make a list of all the great mathematicians that you know of or have learned about. What do you know of their achievements?,Discussion,Leonhard Euler (1707-1783),Nationality Swiss Fields Mathematician and Physicist,pure (纯的) symbol (符号) (圆周率) sine (正弦) cosine (余弦) topology
9、 (拓扑学) angle (角) diagram (图表),Read the words below and learn to pronounce them correctly.,pure (纯的) symbol (符号) (圆周率) sine (正弦) cosine (余弦) topology (拓扑学) angle (角) diagram (图表),Listen to Part 1 and tick the words below that Euler introduced into mathematics.,Listen to Part 2 and fill in the chart b
10、elow.,topology,introduced many new symbols into mathswrote more books than anyone before or sincediscovered a new branch of mathematics,What was the problem of the city of Konigsberg?,It had a river running through it. The centre of Konigsberg is an island and as it passes the island the river breaks into two parts. Seven bridges were built so that the people of the city could get from one part to another. The people wondered if you could walk around the city so that you would cross each bridge only once.,