人教版版高中英语电子课本必修4Word版.docx

1、人教版版高中英语电子课本必修4Word版必修4 Unit 1A STUDENT OF AFRICAN WILDLIFEIt is 5:45 am and the sun is just rising over Gombe National Park in East Africa. Following Janes way of studying chimps, our group are all going to visit them in the forest. Jane has studied these families of chimps for many years and helpe

2、d people understand how much they behave like humans. Watching a family of chimps wake up is our first activity of the day. This means going back to the place where we left the family sleeping in a tree the night before. Everybody sits and waits in the shade of the trees while the family begins to w

3、ake up and move off. Then we follow as they wander into the forest. Most of the time, chimps either feed or clean each other as a way of showing love in their family. Jane warns us that our group is going to be very tired and dirty by the afternoon and she is right. However, the evening makes it all

4、 worthwhile. We watch the mother chimp and her babies play in the tree. Then we see them go to sleep together in their nest for the night. We realize that the bond between members of a chimp family is as strong as in a human family.Nobody before Jane fully understood chimp behaviour. She spent years

5、 observing and recording their daily activities. Since her childhood she had wanted to work with animals in their own environment. However, this was not easy. When she first arrived in Gombe in 1960, it was unusual for a woman to live in the forest. Only after her mother came to help her for the fir

6、st few months was she allowed to begin her project. Her work changed the way people think about chimps. For example, one important thing she discovered was that chimps hunt and eat meat. Until then everyone had thought chimps ate only fruit and nuts. She actually observed chimps as a group hunting a

7、 monkey and then eating it. She also discovered how chimps communicate with each other, and her study of their body language helped her work out their social system.For forty years Jane Goodall has been outspoken about making the rest of the world understand and respect the life of these animals. Sh

8、e has argued that wild animals should be left in the wild and not used for entertainment or advertisements. She has helped to set up special places where they can live safely. She is leading a busy life but she says: Once I stop, it all comes crowding in and I remember the chimps in laboratories. It

9、s terrible. It affects me when I watch the wild chimps. I say to myself, Arent they lucky? And then I think about small chimps in cages though they have done nothing wrong. Once you have seen that you can never forget .She has achieved everything she wanted to do: working with animals in their own e

10、nvironment, gaining a doctors degree and showing that women can live in the forest as men can. She inspires those who want to cheer the achievements of women.WHY NOT CARRY ON HER GOOD WORK?I enjoyed English, biology, and chemistry at school, but which one should I choose to study at university? I di

11、d not know the answer until one evening when I sat down at the computer to do some research on great women of China.By chance I came across an article about a doctor called Lin Qiaozhi, a specialist in womens diseases. She lived from 1901 to 1983. It seemed that she had been very busy in her chosen

12、career, travelling abroad to study as well as writing books and articles. One of them caught my eye. It was a smallbook explaining how to cut the death rate from having and caring for babies. She gave some simple rules to follow for keeping babies clean, healthy and free from sickness. Why did she w

13、rite that? Who were the women that Lin Qiaozhi thought needed this advice? I looked carefully at the text andrealized that it was intended for women in the countryside. Perhaps if they had an emergency they could not reach a doctor.Suddenly it hit me how difficult it was for a woman to get medical t

14、raining at that time. That was a generation when girls education was always placed second to boys. Was she so much cleverer than anyone else? Further reading made me realize that it was hard work and determination as well as her gentle nature that got her into medical school. What made her succeed l

15、ater on was the kindness and consideration she showed to all her patients. There was story after story of how Lin Qiaozhi, tired after a days work, went late at night to deliver a baby for a poor family who could not pay her.By now I could not wait to find out more about her. I discovered that Lin Q

16、iaozhi had devoted her whole life to her patients and had chosen not to have a family of her own. Instead she made sure that about 50,000 babies were safely delivered. By this time I was very excited. Why not study at medical college like Lin Qiaozhi and carry on her good work? It was still not too

17、late for me to improve my studies, prepare for the university entrance examinations, and.必修4 Unit 2A PIONEER FOR ALL PEOPLEAlthough he is one of Chinas most famous scientists, Yuan Longping considers himself a farmer, for he works the land to do his research. Indeed, his sunburnt face and arms and h

18、is slim, strong body are just like those of millions of Chinese farmers, for whom he has struggled for the past five decades. Dr Yuan Longping grows what is called super hybrid rice. In 1974, he became the first agricultural pioneer in the world to grow rice that has a high output. This special stra

19、in of rice makes it possible to produce one-third more of the crop in the same fields. Now more than 60% of the rice produced in China each year is from this hybrid strain.Born into a poor farmers family in 1930, Dr Yuan graduated from Southwest Agricultural College in 1953. Since then, finding ways

20、 to grow more rice has been his life goal. As a young man, he saw the great need for increasing the rice output. At that time, hunger was a disturbing problem in many parts of the countryside. Dr Yuan searched for a way to increase rice harvests without expanding the area of the fields. In 1950, Chi

21、nese farmers could produce only fifty million tons of rice. In a recent harvest, however, nearly two hundred million tons of rice was produced. These increased harvests mean that 22% of the worlds people are fed from just 7% of the farmland in China. Dr Yuan is now circulating his knowledge in India

22、, Vietnam and many other less developed countries to increase their rice harvests. Thanks to his research, the UN has more tools in the battle to rid the world of hunger. Using his hybrid rice, farmers are producing harvests twice as large as before.Dr Yuan is quite satisfied with his life. However,

23、 he doesnt care about being famous. He feels it gives him less freedom to do his research. He would much rather keep time for his hobbles. He enjoys listening to violin music, playing mah-jong, swimming and reading. Spending money on himself or leading a comfortable life also means very little to hi

24、m. Indeed, he believes that a person with too much money has more rather than fewer troubles. He therefore gives millions of yuan to equip others for their research in agriculture.Just dreaming for things, however, costs nothing. Long ago Dr yuan had a dream about rice plants as tall as sorghum. Eac

25、h ear of rice was as big as an ear of corn and each grain of rice was as huge as a peanut. Dr Yuan awoke from his dream with the hope of producing a kind of rice that could feed more people. Now, many years later, Dr Yuan has another dream: to export his rice so that it can be grown around the globe

26、. One dream is not always enough, especially for a person who loves and cares for his people.CHEMICAL OR ORGANIC FARMING?Over the past half century, using chemical fertilizers has become very common in farming. Many farmers welcomed them as a great way to stop crop disease and increase production. R

27、ecently, however, scientists have been finding that long-term use of these fertilizers can cause damage to the land and, even more dangerous, to peoples health.What are some of the problems caused by chemical fertilizers? First, they damage the land by killing the helpful bacteria and pests as well

28、as the harmful ones. Chemicals also stay in the ground and underground water for a long time. This affects crops and, therefore, animals and humans, since chemicals get inside the crops and cannot just be washed off. These chemicals in the food supply build up in peoples bodies over time. Many of th

29、ese chemicals can lead to cancer or other illnesses. In addition, fruit, vegetables and other food grown with chemical fertilizers usually grow too fast to be full of much nutrition. They may look beautiful, but inside there is usually more water than vitamins and minerals.With these discoveries, so

30、me farmers and many customers are beginning to turn to organic farming. Organic farming is simply farming without using any chemicals. They focus on keeping their soil rich and free of disease. A healthy soil reduces disease and helps crops grow strong and healthy. Organic farmers, therefore, often

31、prefer using natural waste from animals as fertilizer. They feel that this makes the soil in their fields richer in minerals and so more fertile. This also keeps the air, soil, water and crops free from chemicals.Organic farmers also use many other methods to keep the soil fertile. They often change

32、 the kind of crop in each field every few years, for example, growing corn or wheat and then the next year peas or soybeans. Crops such as peas or soybeans put important minerals back into the soil, making it ready for crops such as wheat or corn that need rich and fertile soil. Organic farmers also plant crops to use different levels of soil, for example, planting peanuts that use the grounds surface followed by vegetables that put down deep roots. Some organic farmers prefer planting grass between crops to prevent wind or water from carrying away the soil, and then leaving it in t