人教版英语必修3 unit4--5课本电子版

HOW LIFE BEGAN ON THE EARTH

No one knows exactly how the earth began, as it happened so long ago. However, according to a widely accepted theory, the universe began with a "Big Bang" that threw matter in all directions. After that, atoms began to form and combine to create stars and other bodies.

For several billion years after the "Big Bang", the earth was still just a cloud of dust. What it was to become was uncertain until between and billion years ago when the dust settled into a solid globe. The earth became so violent that it was not clear whether the shape would last or not. It exploded loudly with fire and rock. They were in time to produce carbon, nitrogen, water vapour and other gases, which were to make the earth's atmosphere. What is even more important is that as the earth cooled down, water began to appear on its surface.

Water had also appeared on other planets like Mars but, unlike the earth, it had disappeared later. It was not immediately obvious that water was to be fundamental to the development of life. What many scientists believe is that the continued presence of water allowed the earth to dissolve harmful gases and acids into the oceans and seas. This produced a chain reaction, which made it possible for life to develop.

Many millions of years later, the first extremely small plants began to appear on the surface of the water. They multiplied and filled the oceans and seas with oxygen, which encouraged the later development of early shellfish and all sorts of fish. Next, green plants began to grow on land. They were followed in time by land animals. Some were insects. Others, called amphibians, were able to live on land as well as in the water. Later when the plants grew into forests, reptiles appeared for the first time. They produced young generally by laying eggs. After that, some huge animals, called dinosaurs, developed. They laid eggs too and existed on the earth for more than 140 million years. However, 65 million years ago the age of the dinosaurs ended. Why they suddenly disappeared still remains a mystery. This disappearance made possible the rise of mammals on the earth. These animals were different from all life forms in the past,

because they gave birth to young baby animals and produced milk to feed them.

Finally about million years ago some small clever animals, now with hands and feet, appeared and spread all over the earth. Thus they have, in their turn, become the most important animals on the planet. But they are not looking after the earth very well. They are putting too much carbon dioxide into the atmosphere, which prevents heat from escaping from the earth into space. As a result of this, many scientists believe the earth may become too hot to live on. So whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved.

A VISIT TO THE MOON

Last month I was lucky enough to have a chance to make a trip into space with my friend Li Yanping, an astronomer. We visited the moon in our spaceship!

Before we left, Li Yanping explained to me that the force of gravity would change three times on our journey and that the first change would be the most powerful. Then we were off. As the rocket rose into the air, we were pushed back into our seats because we were trying to escape the pull of the earth's gravity. It was so hard that we could not say anything to each other. Gradually the weight lessened and I was able to talk to him. "Why is the spaceship not falling back to the earth On the earth if I fall from a tree I will fall to the ground." I asked. "We are too far from the earth now to feel its pull," he explained, "so we feel as if there is no gravity at all. When we get closer to the moon, we shall feel its gravity pulling us, but it will not be as strong a pull as the earth's." I cheered up immediately and floated weightlessly around in our spaceship cabin watching the earth become smaller and the moon larger.

When we got there, I wanted to explore immediately. "Come on," I said. "If you are right, my mass will be less than on the earth because the moon is smaller and I will be able to move more freely. I might even grow taller if I stay here long enough. I shall certainly weigh less!" I laughed and climbed down the steps from the spaceship.

But when I tried to step forward, I found I was carried twice as far as on the earth and fell over. "Oh dear," I cried, "walking does need a bit of practice now that gravity has changed." After a while I got the hang of it and we began to enjoy ourselves.

Leaving the moon's gravity was not as painful as leaving the earth's. But returning to the earth was very frightening. We watched, amazed as fire broke out on the outside of the spaceship as the earth's gravity increased. Again we were pushed hard into our seats as we came back to land. "That was very exhausting but very exciting too," I said. "Now I know much more about gravity! Do you think we could visit some stars next time" "Of course," he smiled, "which star would you like to go to"

CAUGHT BY A BLACK HOLE

The spaceship warned Li Yanping and me to be ready as we were approaching the "black hole". We could see some faint lights around what looked like an empty space. Li Yanping said, "That empty hole is like a mouth always needing to be fed. Those lights are things that are being pulled into it by the gravity of the hole." We watched with interest and amazement at the lights which seemed to be going fainter and fainter round the edge of the black hole. Just then the lights on our spaceship went out and the computer stopped working. What was happening I tried to turn the spaceship away from the hole but it would not move. Would it eat us too

Suddenly the spaceship jumped and began to move round the edge of the hole too. The gravity of the "black hole" was pulling us into its "mouth". As the spaceship moved round the black hole, I felt rather sick. My mouth went dry and I closed my eyes. All the stories about what happened when you were caught by the gravity of a "black hole" seemed to be true.

But then the spaceship jumped again. This time it moved sideways and away from the edge of the "black hole". Someone watching me would have seen the spaceship flying like a bird away from the "black hole". But we felt nothing. At last we were able to look around us. Luckily the computer had started working again. We realized that we had

discovered something new about "black holes". If you go inside the edge of a "black hole", it will "eat" you and there is no escape; but if you do not, you may have an opportunity to escape. How exciting!

Unit5

A TRIP ON "THE TRUE NORTH"

Li Daiyu and her cousin Liu Qian were on a trip to Canada to visit their cousins in Montreal on the Atlantic coast. Rather than take the aeroplane all the way, they decided to fly to Vancouver and then take the train west to east across Canada. The thought that they could cross the whole continent was exciting.

Their friend, Danny Lin, was waiting at the airport. He was going to take them and their baggage to catch "The True North", the cross-Canada train. On the way to the station, he chatted about their trip. "You're going to see some great scenery. Going eastward, you'll pass mountains and thousands of lakes and forests, as well as wide rivers and large cities. Some people have the idea that you can cross Canada in less than five days, but they forget the fact that Canada is 5,500 kilometres from coast to coast. Here in Vancouver, you're in Canada's warmest part. People say it is Canada's most beautiful city surrounded by mountains and the Pacific Ocean. Skiing in the Rocky Mountains and sailing in the harbour make Vancouver one of Canada's most popular cities to live in. Its population is increasing rapidly. The coast north of Vancouver has some of the oldest and most beautiful forests in the world. It is so wet there that the trees are extremely tall, some measuring over 90 metres."

That afternoon aboard the train, the cousins settled down in their seats. Earlier that day, when they crossed the Rocky Mountains, they managed to catch sight of some mountain goats and even a grizzly bear and an eagle. Their next stop was Calgary, which is famous for the Calgary Stampede. Cowboys from all over the world come to compete in the Stampede. Many of them have a gift for riding wild horses and can win thousands of dollars in prizes.

After two days' travel, the girls began to realize that Canada is quite empty. At school, they had learned that most Canadians live

within a few hundred kilometres of the USA border, and Canada's population is only slightly over thirty million, but now they were amazed to see such an empty country. They went through a wheat-growing province and saw farms that covered thousands of acres. After dinner, they were back in an urban area, the busy port city of Thunder Bay at the top of the Great Lakes. The girls were surprised at the fact that ocean ships can sail up the Great Lakes. Because of the Great Lakes, they learned, Canada has more fresh water than any other country in the world. In fact, it has one-third of the world's total fresh water, and much of it is in the Great Lakes.

That night as they slept, the train rushed across the top of Lake Superior, through the great forests and southward towards Toronto.

“THE TURE NORTH” FROM TORONTO TO MONTREAL

The next morning the bushes and maple trees outside their windows were red, gold and orange, and there was frost on the ground, confirming that fall had arrived in Canada.

Around noon they arrived in Toronto, the biggest and most wealthy city in Canada. They were not leaving for Montreal until later, so they went on a tour of the city. They went up the tall CN Tower and looked across the lake. In the distance, they could see the misty cloud that rose from the great Niagara Falls, which is on the south side of the lake. The water flows into the Niagara River and over the falls on its way to the sea.

They saw the covered stadium, home of several famous basketball teams. As they walked north from the harbour area, Li Daiyu said, "Lin Fei, one of my mother's old schoolmates, lives here. I should phone her from a telephone booth."

They met Lin Fei around dusk in downtown Chinatown, one of the three in Toronto. Over dinner at a restaurant called The Pink Pearl, the cousins chatted with Lin Fei, who had moved to Canada many years earlier. "We can get good Cantonese food here," Lin Fei told them, "because most of the Chinese people here come from South China, especially Hong Kong. It's too bad you can't go as far as Ottawa,

Canada's capital. It's approximately four hundred kilometres northeast of Toronto, so it would take too long."

The train left late that night and arrived in Montreal at dawn the next morning. At the station, people everywhere were speaking French. There were signs and ads in French, but some of them had English words in smaller letters. "We don't leave until this evening," said Liu Qian. "Let's go downtown. Old Montreal is close to the water." They spent the afternoon in lovely shops and visiting artists in their workplaces beside the water. As they sat in a buffet restaurant looking over the broad St Lawrence River, a young man sat down with them.

"Hello, my name is Henri. I'm a student at the university nearby," he said, "and I was wondering where you are from." The girls told him they were on a train trip across Canada and that they had only one day in Montreal. "That's too bad," he said. "Montreal is a city with wonderful restaurants and clubs. Most of us speak both English and French, but the city has French culture and traditions. We love good coffee, good bread and good music."

That night as the train was speeding along the St Lawrence River toward the Gulf of St Lawrence and down to the distant east coast, the cousins dreamed of French restaurants and red maple leaves.

IQALUIT-- THE FROZEN TOWN

The reporter, Beth Allen, arrived in a northern community called Iqaluit in Nunavut .Nunavut was created in 1999 as a special area for Inuit people. Its name means "Our Land" in their language. It is in the farthest northeastern area of Canada, north of the Arctic Circle, and is very cold - the average winter temperature in Nunavut is 35 degrees below zero.

Beth said, "I knew it would be cold in January, but not this cold! Maybe there is a dog sled that can take me into town."

The quiet man who had been on the plane with her said, "I'll take you into town, but I don't have a dog sled. Most people only use the dogs for competitions. Why are you visiting Iqaluit"

Beth answered, "I'm writing a story for my newspaper about Iqaluit - we'd like to advertise it as a holiday place, but I think it's too cold."

The man laughed. "My name is Simon and I am Inuit," he said. "I think it's too far north here for holidays but more and more tourists are coming. They like ice fishing and photographing polar bears. I stay as far away from polar bears as possible. I like my warm office and my warm house."

Beth asked, "What do you do in an office Don't you hunt animals for a living I thought you lived in ice houses."

"I'm a business man. My grandfather would live in ice houses when he hunted in winter, but not so many people do that now. The old men used to make one in a few hours. They used to live in skin tents in summer - the tents were easy to move so the people could follow the animals."

A few minutes later they arrived in Iqaluit, a town with a population of 6,000, on Simon's snowmobile. It was two o'clock in the afternoon, but it was already dark, and all the houses shone with bright lights. Beth said, "Why is it so dark It's the middle of the day!"

Simon replied, "It's dark in the day because we are so far north. You should come in June. The sun shines all night in the north then. That's why it's called 'The Land of the Midnight Sun'." There were people on the streets and snowmobiles everywhere. There were even a few dog teams.

高中人教版英语必修五课本答案

教材练习答案及听力原文 Unit 1 WARMING UP ?Answers: 1 Archimedes, Ancient Greek (287-21 2 BC) He was a mathematician. He found that if you put an object into water the water pushes the object up. It rises and partly floats. The force of the water pushing it up is the same as the weight of the object. 2 Charles Darwin, British (1808-1882) The Origin of Species was published in 1859. It explained how plants and animals had changed over time to fit in with a changing environment. At the time it was published it was very controversial. Many people believed the Bible when it said that God made the first two people (Adam and Eve) and that all other people came from these two. Darwin’s book showed that people had developed from apes instead. So this caused a lot of ar gument between religious and scientific people. However Darwin’s idea became very influential and is still accepted today. 3 Thomas Newcomen, British (1663-1729) He improved the first steam pump built by Thomas Savery in 1698 and turned it into a steam engine for taking water out of mines in 1712. James Watt improved it still further in the 1770s turning it into the first modern steam engine used on the railways. 4 Gregor Mendel, Czech (1822-1884) He grew pea plants and developed ideas on heredity and inherited characteristics. He concentrated on cross-fertilising pea plants and analyzing the results. Between 1856-1863 he grew 28,000 pea plants. He examined seven kinds of seed and plant characteristics and developed some laws of inheritance. The first is that inheritance factors do not combine but are passed to the next generation intact. Second, he found that each partner gives half the inherited factors to the young. Third, some of these factors show up in the offspring (and so are dominant). The other factors are masked by the dominant ones (and so are recessive). 5 Marie Curie, Polish and French (1867-1934) She was born in Poland and came to study in France in 1891 and she lived there for the rest of her life. In 1898 she discovered radium. She received two Nobel prizes, one (with Pierre Curie) for physics (1903) and one for chemistry (1911). She is the only person to have been so honoured. On the death of her husband she took over his job at the Sorbonne in Paris. Her work on radioactivity and the discovery of radium meant that she began a new scientific area of research. She was the first woman to receive a Nobel Prize and the first woman to teach at the Sorbonne. 6 Thomas Edison, American (1847-1931) He was already an inventor of other electrical devices (phonograph, electric light bulb) when in 1882 he designed a system for providing New York with electricity from a central power station. This was a tremendous achievement, which had previously been thought impossible.

(完整版)高中英语人教版必修一课文内容电子版Unit2

Unit 2 English around the world The road to modern English At the end of the 16th century, about five to seven million people spoke English. Nearly all of them lived in England. Later in the next century, people from England made voyages to conquer other parts of the world and because of that, English began to be spoken in many other countries. Today, more people speak English as their first, second or foreign language than ever before. Native English speakers can understand each other even if they don’t speak the same kind of English. Look at this example: British Betty: Would you like to see my flat? American Amy: Yes. I’d like to come up to your apartment. So why has English changed over time? Actually, all languages change and develop when cultures meet and communicate with each other. At first, the English spoken in England between about AD 450 and 1150 was very different from the English spoken today. It was based more on German than the English we speak at present. Then gradually between about AD 800 and 1150, English became less like German because those who ruled England spoke first Danish and later French. These new settlers enriched the English language and especially its vocabulary. So by the 1600’s Shakespeare was able to make use of a wider vocabulary than ever before. In 1620 some British settlers moved to America. Later in the 18th century some British people were taken to Australia too. English began to be spoken in both countries. Finally by the 19th century the language was settled. At that time two big changes in English spelling happened: first Samuel Johnson wrote his dictionary and later Noah Webster wrote The America Dictionary of the English Language. The latter gave a separate identity to American English spelling. English now is also spoken as a foreign or second language in South Asia. For example, India has a very large number of fluent English speakers because Britain ruled India from 1765 to 1947. During that time English became the language for government and education. English is also spoken in Singapore and Malaysia and countries in Africa such as South Africa. Today the number of people learning English in China is increasing rapidly. In fact, China may have the largest number of English learners. Will Chinese English develop its own identity? Only time will tell. STANDARD ENGLISH AND DIALECTS What is standard English? Is it spoken in Britain, the US, Canada, Australia, India and New Zealand? Believe it or not, there is no such thing as standard English. This is because in the early days of radio, those who reported the news were expected to speak excellent English. However, on TV and the radio you will hear differences in the way people speak. When people use words and expressions different from “standard language”, it is called a dialect. American English has many dialects, especially the midwestern, southern, African American and Spanish dialects. Even in some parts of the USA, two people from neighboring towns speak a little differently. American English has so many dialects because people have come from all over the world. Geography also plays a part in making dialects. Some people who live in the mountains of the eastern USA speak with an older kind of English dialect. When Americans moved from one place to another, they took their dialects with them. So people from the mountains in the southeastern USA speak with almost the same dialect as people in the northwestern USA. The USA is a large country in which many different dialects are spoken. Although many Americans move a lot, they still recognize and understand each other’s dialects.

人教版高中英语必修三课文电子文档

Unit 1 Festivals around the world FESTIVALS AND CELEBRATIONS Festivals and celebrations of all kinds have been held everywhere since ancient times. Most ancient festivals would celebrate the end of cold weather, planting in spring and harvest in autumn. Sometimes celebrations would be held after hunters had caught animals. At that time people would starve if food was difficult to find, especially during the cold winter months. Today’s festivals have many origins, some religious, some seasonal, and some for special people or events. Festivals of the dead Some festivals are held to honour the dead or to satisfy the ancestors, who might return either to help or to do harm. For the Japanese festival Obon, people should go to clean graves and light incense in memory of their ancestors. They also light lamps and play music because they think that will lead the ancestors back to earth. In Mexico, people celebrate the Day of the Dead in early November. On this important feast day, people eat food in the shape of skulls and cakes with “bones”on them. They offer food, flowers and gifts to the dead. The Western holiday Halloween also had its origin in old beliefs about the return of the spirits of dead people. It is now a children’s festival, when they can dress up and go to their neighbours’ homes to ask for sweets. If the neighbours do not give any sweets, the children might play a trick on them. Festivals to Honour People Festivals can also be held to honour famous people. The Dragon Boat Festival in China honours the famous ancient poet, Qu Yuan. In the USA, Columbus Day is in memory of the arrival of Christopher Columbus in the New World. India has a national festival on October 2 to honour Mohandas Gandhi, the leader who helped gain India’s independence from Britain. Harvest Festivals Harvest and Thanksgiving festivals can be very happy events. People are grateful because their food is gathered for the winter and the agricultural work is over. In European countries, people will usually decorate churches and town halls with flowers and fruit, and will get together to

人教版高中英语必修五电子课本

按住Ctrl键单击鼠标打开配套教学视频名师讲课播放 必修5 Unit 1 JOHH SHOW DEFEATS “KING CHOLERA” John Snow was a famous doctor in London - so expert, indeed, that he attend ed Queen Victoria as her personal physician. But he became inspired when he tho ught about helping ordinary people exposed to cholera. This was the deadly dise ase of its day. Neither its cause nor its cure was understood. So many thousand s of terrified people died every time there was an outbreak. John Snow wanted t o face the challenge and solve this problem. He knew that cholera would never b e controlled until its cause was found. He became interested in two theories that possibly explained how cholera ki lled people. The first suggested that cholera multiplied in the air. A cloud of dangerous gas floated around until it found its victims. The second suggested that people absorbed this disease into their bodies with their meals. From the stomach the disease quickly attacked the body and soon the affected person die d. John Snow suspected that the second theory was correct but he needed eviden ce. So when another outbreak hit London in 1854, he was ready to begin his enqu iry. As the disease spread quickly through poor neighbourhoods, he began to gat her information. In two particular streets, the cholera outbreak was so severe that more than 500 people died in ten days. He was determined to find out why. First he marked on a map the exact places where all the dead people had liv ed. This gave him a valuable clue about the cause of the disease. Many of the d eaths were near the water pump in Broad Street (especially numbers 16, 37, 38 a nd 40). He also noticed that some houses (such as 20 and 21 Broad Street and 8 and 9 Cambridge Street) had had no deaths. He had not foreseen this, so he made further investigations. He discovered that these people worked in the pub at 7 Cambridge Street. They had been given free beer and so had not drunk the water from the pump. It seemed that the water was to blame. Next, John Snow looked into the source of the water for these two streets. He found that it came from the river polluted by the dirty water from London. H e immediately told the astonished people in Broad Street to remove the handle f rom the pump so that it could not be used. Soon afterwards the disease slowed d own. He had shown that cholera was spread by germs and not in a cloud of gas. In another part of London, he found supporting evidence from two other deat hs that were linked to the Broad Street outbreak. A woman, who had moved away f rom Broad Street, liked the water from the pump so much that she had it deliver ed to her house every day. Both she and her daughter died of cholera after drin king the water. With this extra evidence John Snow was able to announce with ce rtainty that polluted water carried the virus.

北师大版高中英语必修一课文电子版

Unit 1 Lifestyles Warm-up Tapescript 1 Football player: Being famous isn’t easy, you know. I travel a lot – I have matches in different countries. But my job is exciting, very exciting! I love the matches, the people cheering, know what I mean? 2 Student: My dad says these are the best days of my life –but I’m not so sure! You know, I’ve got lots of work to do and there’s not much time really. I also play football for the school team and we have to do training three nights a week. 3 Shepherd: I love the animals and I love nature. It’s peaceful, and there’s no one to tell me what to do. But it’s not so good when the weather’s bad! 4 Business manager: I’m very busy, and I don’t have time to see my husband and children. Mmmm and my life is very stressful, I suppose. I mean, I have to deal with lots of money. But I find it really exciting. 1 A Perfect Day? A Couch Potato Forty-three-year-old Brian Blakey from Birmingham is sitting on his sofa and telling me about his perfect day.

完整word版,人教版高中英语必修五单词表

人教版高中英语必修五单词表 Unit 1 characteristic /k?rikt?'ristik/ n. 特征；特性radium /'reidi?m/ n. 镭 painter /'peint?/ n. 画家；油漆匠 put forward 提出 scientific /sai?n'tifik/ adj. 科学的 conclude /k?n'klu:d/ vt. & vi. 结束；推断出conclusion /k?n'klu:?n/ n. 结论；结束 draw a conclusion 提出结论 analyse /'?n?laiz/ vt. 分析 △ infect /in'fekt/ vt. 传染；感染 △ infectious /in'fek??s/ adj. 传染的 △ cholera /'k?l?r?/ n. 霍乱 defeat /di'fi:t/ vt. 打败；战胜；使受挫 n. 失败expert /'eksp?:t/ adj. 熟练的；经验或知识丰富的n. 专家；行家 attend /?'tend/ vt. 照顾；护理；出席；参加physician /fi'zi?n/ n. 医生；内科医师 expose /ik'sp?uz/ vt. 暴露；揭露；使曝光expose … to 使显露；暴露 △ deadly /'dedli/ adj. 致命的 cure /kju?/ n. 治愈；痊愈 vt. 治愈；治疗 △outbreak /'autbreik/ n. 爆发；发作 （尤指疾病或战争） challenge /'t??lind?/ n. 挑战 vt. 向……挑战victim /'viktim/ n. 受害者 absorb /?b'z?:b/ vt. 吸收；吸引；使专心suspect /s?'spekt/ vt. 怀疑 /'s?spekt/ n. 被怀疑者；嫌疑犯 enquiry /in'kwai?ri/ n. 询问 neighbourhood /'neib?hud/ n. 附近；邻近severe /si'vi?/ adj. 严重的；剧烈的；严厉的 △ clue /klu:/ adj. 线索；提示 pump /p?mp/ n. 泵；抽水机

高中英语必修五课文及翻译

高中英语必修五课文及翻 译 Final approval draft on November 22, 2020

-必修 5 Unit 2 The United Kingdom Reading PUZZLES IN GEOGRAPHY People may wonder why different words are used to describe these four countries: England, Wales, Scotland and Northern Ireland. You can clarify this question if you study British history. First there was England. Wales was linked to it in the thirteenth century. Now when people refer to England you find Wales included as well. Next England and Wales were joined to Scotland in the seventeenth century and the name was changed to "Great Britain". Happily this was accomplished without conflict when King James of Scotland became King of England and Wales as well. Finally the English government tried in the early twentieth century to form the United Kingdom by getting Ireland connected in the same peaceful way. However, the southern part of Ireland was unwilling and broke away to form its own government. So only Northern Ireland joined with England, Wales and Scotland to become the United Kingdom and this was shown to the world in a new flag called the Union Jack. To their credit the four countries do work together in some areas (eg, the currency and international relations), but they still have very different institutions. For example, Northern Ireland, England and Scotland have different educational and legal systems as well as different football teams for competitions like the World Cup! England is the largest of the four countries, and for convenience it is divided roughly into three zones. The zone nearest France is called the South of England, the middle zone is called the Midlands and the one nearest to Scotland is known as the North. You find most of the population settled in the south, but most of the industrial cities in the Midlands and the North of England. Although, nationwide, these cities are not as large as those in China, they have world-famous football teams and some of them even have two! It is a pity that the industrial cities built in the nineteenth century do not attract visitors. For historical architecture you have to go to older but smaller towns built by the Romans. There you will find out more about British history and culture. The greatest historical treasure of all is London with its museums, art collections, theatres, parks and buildings. It is the centre of national

人教版 英语 必修一 课文 电子版

Unit1 Friendship Reading ANNE’S BEST FRIEND Do you want a friend whom you could tell everything to, like your deepest feelings and thoughts? Or are you afraid that your friend would laugh at you, or would not understand what you are going through? Anne Frank wanted the first kind, so she made her diary her best friend. Anne lived in Amsterdam in the Netherlands during World War II. Her family was Jewish so the had to hide or they would be caught by the German Nazis. She and her family hide away for two years before they were discovered. During that time the only true friend was her diary. She said, “I don’t want to set down a series of facts in a diary as most people do, but I want this diary itself to be my friend, and I shall call my friend Kitty.” Now read how she felt after being in the hiding place since July 1942. Dear kitty, I wonder if it’s because I haven’t been able to be outdoors for so long that I’ve grown so crazy about everything to do with nature. I can well remember that there was a time when a deep blue sky, the song of the birds, moonlight and flowers could never have kept me spellbound. That’s changed since I was here. …For example, when it was so warm, I stayed awake on purpose until half past eleven one evening in order to have a good look at the moon for once by myself. But as the moon gave far too much light, I didn’t dare open a window. Another time some months ago, I happened to be upstairs one evening when the window was open. I didn’t go downstairs until the window had to be shut. The dark, rainy evening, the wind, the thundering clouds held me entirely in their power; it was the first time in a year and a half that I’d seen the night face to face… …Sadly…I am only able to look at nature through dirty curtains hanging before very du sty windows. It’s no pleasure looking through these any longer because nature is one thing that really must be experienced. Yours, Anne Reading and writing Miss Wang has received a letter from Xiaodong. He is also asking for some advice. Read the letter on the right carefully and help Miss Wang answer it.

人教版 英语 必修五 课文 电子版

U n i t1G R E A T S C I E N T I S T S JOHN SNOW DEFEATS “KING CHOLERA” John Snow was a famous doctor in London — so expert, indeed, that he attended Queen Victoria as her personal physician. But he became inspired when he thought about helping ordinary people exposed to cholera. This was the deadly disease of its day. Neither its cause nor its cure was understood. So many thousands of terrified people died every time there was an outbreak. John Snow wanted to face the challenge and solve this problem. He knew that cholera would never be controlled until its cause was found. He became interested in two theories that possibly explained how cholera killed people. The first suggested that cholera multiplied in the air, a cloud of dangerous gas floated around until it found its victims. From the stomach the disease quickly attacked the body and soon the affected person died. John Snow suspected that the second theory was correct but he needed evidence. So when another outbreak hit London in 1854, he was ready to begin his enquiry. As the disease spread quickly through poor neighbourhoods, he began to gather information. In two particular streets, the cholera outbreak was so severe that more than 500 people died in ten days. He was determined to find out why. First he marked on a map the exact places where all the dead people have lived. This gave him a valuable clue about the cause of the disease. Many of the deaths were near the water pump in Broad Street (especially numbers 163738 and 40). He also noticed that some houses (such as 20 and 21 Broad Street and 8 and 9 Cambridge Street) had had no deaths. He had not foreseen this, so he made further investigations. He discovered that these people worked in the pub at 7 Cambridge Street. They had been given free beer and so had not drunk the water from the pump. It seemed that the water was to blame, Next, John Snow looked into the source of the water for these two streets. He found that it came from the river polluted by the dirty water from London. He immediately told the astonished people in Broad Street to remove the handle from the pump so that it could not be used. Soon afterwards the disease slowed down. He had shown that cholera was spread by germs and not in a cloud of gas. In another part of London, he found supporting evidence from two other deaths that were linked to the Broad Street outbreak. A woman, who had moved away from Broad Street, liked the water from the pump so much that she had it delivered to her house every day. Both she and her daughter died of cholera after drinking the water. With this extra evidence John Snow was able to announce with certainty that polluted water carried the virus. To prevent this from happening again, John Snow suggested that the source of all the water supplies be examined. The water companies were instructed not to expose people to polluted water any more. Finally “King Cholera” was defeated.