选修八课文.docx

1、选修八课文Unit 1 CALIFORNIA多样性的土地California is the third largest state in the USA but has the largest population. It also has the distinction of being the most multicultural state in the USA, having attracted people from all over the world. The customs and languages of the immigrants live on in their new

2、 home. This diversity of culture is not surprising when you know the history of California.NATIVE AMERCANSExactly when the first people arrived in what we now know as California, no one really knows. However, it is likely that Native Americans were living in California at least fifteen thousand year

3、s ago. Scientists believe that these settlers crossed the Bering Strait in the Arctic to America by means of a land bridge which existed in prehistoric times. In the 16th century, after the arrival of the Europeans, the native people suffered greatly. Thousands were killed or forced into slavery. In

4、 addition, many died from the diseases brought by the Europeans. However, some survived these terrible times, and today there are more Native Americans living in California than in any other state.THE SPANISHIn the 18th century California was ruled by Spain. Spanish soldiers first arrived in South A

5、merica in the early 16th century, when they fought against the native people and took their land. Two centuries later, the Spanish had settled in most parts of South America and along the northwest coast of what we now call the United States. Of the first Spanish to go to California, the majority we

6、re religious men, whose ministry was to teach the Catholic religion to the natives. In 1821, the people of Mexico gained their independence from Spain. California then became part of Mexico. In 1846 the United States declared war on Mexico, and after the war won by the USA, Mexico had to give Califo

7、rnia to the USA. However, there is still a strong Spanish influence in the state. That is why today over 40 of Californians speak Spanish as a first or second language.RUSSIANSIn the early 1800s, Russian hunters, who had originally gone to Alaska, began settling in California. Today there are about

8、25,000 Russian-Americans living in and around San Francisco.GOLD MINERSIn 1848, not long after the American-Mexican war, gold was discovered in California. The dream of becoming rich quickly attracted people from all over the world. The nearest, and therefore the first to arrive, were South American

9、s and people from the United States. Then adventurers from Europe and Asia soon followed. In fact, few achieved their dream of becoming rich. Some died or returned home, but most remained in California to make a life for themselves despite great hardship. They settled in the new towns or on farms. B

10、y the time California elected to become the thirty-first federal state of the USA in 1850, it was already a multicultural society.LATER A RRIVALSAlthough Chinese immigrants began to arrive during the Gold Rush Period, it was the building ofthe rail network from the west to the east coast that brough

11、t even larger numbers to California in the 1860s. Today, Chinese-Americans live in all parts of California, although a large percentage have chosen to stay in the Chinatowns of Los Angeles and San Francisco.Other immigrants such as Italians, mainly fishermen but also wine makers, arrived in Californ

12、ia in the late 19th century. In 1911 immigrants from Denmark established a town of their own, which today still keeps up their Danish culture. By the 1920s the film industry was well established in Hollywood, California. The industry boom attracted Europeans including many Jewish people. Today Calif

13、ornia has the second largest Jewish population in the United States.Japanese farmers began arriving in California at the beginning of the 20th century, and since the 1980s a lot more have settled there. People from Africa have been living in California since the 1800s, when they moved north from Mex

14、ico. However, even more arrived between 1942 and 1945 to work in the ship and aircraft industries.MOST RECENT ARRIVALSIn more recent decades, California has become home to more people from Asia, including Koreans, Cambodians, Vietnamese and Laotians. Since its beginning in the 1970s, the computer in

15、dustry has attracted Indians and Pakistanis to California.THE FUTUREPeople from different parts of the world, attracted by the climate and the lifestyle, still immigrate to California. It is believed that before long the mix of nationalities will be so great that there will be no distinct major raci

16、al or cultural groups, but simply a mixture of many races and cultures.Unit 2 CLONING: WHERE IS IT LEADING US Cloning has always been with us and is here to stay. It is a way of making an exact copy of another animal or plant. It happens in plants when gardeners take cuttings from growing plants to

17、make new ones. It also happens in animals when twins identical in sex and appearance are produced from the same original egg. The fact is that these are both examples of natural clones.Cloning has two major uses. Firstly, gardeners use it all the time to produce commercial quantities of plants. Seco

18、ndly, it is valuable for research on new plant species and for medical research on animals. Cloning plants is straightforward while cloning animals is very complicated. It is a difficult task to undertake. Many attempts to clone mammals failed. But at last the determination and patience of the scien

19、tists paid off in 1996 with a breakthrough - the cloning of Dolly the sheep. The procedure works like this :On the one hand, the whole scientific world followed the progress of the first successful clone, Dolly the sheep. The fact that she seemed to develop normally was very encouraging. Then came t

20、he disturbing news that Dolly had become seriously ill. Cloning scientists were cast down to find that Dollys illnesses were more appropriate to a much older animal. Altogether Dolly lived six and a half years, half the length of the life of the original sheep. Sadly the same arbitrary fate affected

21、 other species, such as cloned mice. The questions that concerned all scientists were: Would this be a major difficulty for all cloned animals Would it happen forever Could it be solved if corrections were made in their research procedureOn the other hand, Dollys appearance raised a storm of objecti

22、ons and had a great impact on the media and public imagination. It became controversial. It suddenly opened everybodys eyes to the possibility of using cloning to cure serious illnesses and even to produce human beings.Although at present human egg cells and embryos needed for cloning research are d

23、ifficult to obtain, newspapers wrote of evil leaders hoping to clone themselves to attain their ambitions. Religious leaders also raised moral questions. Governments became nervous and more conservative. Some began to reform their legal systems and forbade research into human cloning, but other coun

24、tries like China and the UK, continued to accumulate evidence of the abundant medical aid that cloning could provide. However, scientists still wonder whether cloning will help or harm us and where it is leading us.Unit 3 When I called up my mother in the countryside on the telephone she was very up

25、set. There are some snakes in our courtyard, she told me. Snakes come near the house now and then, and they seem to have made their home here, not far from the walnut tree. Can you get rid of them please I felt very proud. Here was a chance for .me to distinguish myself by inventing something mercif

26、ul that would catch snakes but not harm them. I knew my parents would not like me to hurt these living creatures!The first thing I did was to see if there were any products that might help me, but there only seemed to be powders designed to kill snakes. A new approach was clearly needed. I set about

27、 researching the habits of snakes to find the easiest way to trap them. Luckily these reptiles are small and that made the solution easier.Prepared with some research findings, I decided on three possible approaches: firstly, removing their habitat; secondly, attracting them into a trap using male o

28、r female perfume or food; and thirdly cooling them so that they would become sleepy and could be easily caught. I decided to use the last one. I bought an ice-cream maker which was made of stainless steel. Between the outside and the inside walls of the bowl there is some jelly, which freezes when c

29、ooled. I put the bowl into the fridge and waited for 24 hours. At the same time I prepared some ice-cubes.The next morning I got up early before the sun was hot. I placed the frozen bowl over the snakes habitat and the ice-cubes on top of the bowl to keep it cool. Finally I covered the whole thing w

30、ith a large bucket. Then I waited. After two hours I removed the bucket and the bowl. The snakes were less active but they were still too fast for me. They abruptly disappeared into a convenient hole in the wall. So I had to adjust my plan.For the second attempt I froze the bowl and the ice-cubes ag

31、ain but placed them over the snakes habitat in the evening, as the temperature was starting to cool. Then as before, I covered the bowl with the bucket and left everything overnight. Early the next morning I returned to see the result. This time with great caution I bent down to examine the snakes a

32、nd I found them very sleepy. But once picked up, they tried to bite me. As they were poisonous snakes, I clearly needed to improve my design again.My third attempt repeated the second procedure. The next morning I carried in my hand a small net used for catching fish. This was in the expectation tha

33、t the snakes would bite again. But monitored carefully, the snakes proved to be no trouble and all went according to plan. I collected the passive snakes and the next day we merrily released them all back into the wild.Pressed by my friends and relations, I decided to seize the opportunity to get recognition for my succes