外研版高中英语选修8单元语法

外研版高中英语选修8单元语法篇一：(人教版必修1-选修8)高中英语各单元知识点及占分比归纳必修二必修三选修八篇二：人教版高中英语必修一至选修八各单元的语法条目语法目录篇三：高中外研版英语教材选修8课文Module 1Antarctica:the last continent1______________________________Antarctica is the coldest place on Earth. It’s also the driest. With annual rainfall close to zero, Antarctica is technically a desert. Covering about 14 million square kilometres around the South Pole, it is the fifth largest continent in the world. A high mountain range, the Trans-Antarctic range, runs from east to west, cutting the continent in two. There are volcanoes too, but they are not very active. Antarctica holds 90% of the world’s ice, and most of its fresh water (70%) is in a frozen state, of course. 98% of the surface is covered permanently in the icecap. On average it is two kilometres thick, but in some places it reaches a depth of fivekilometres.Strong winds driven by gravity blow from the pole to the coastline, while other winds blow round the coast. It is difficult to imagine a more inhospitable place.2______________________________Yet Antarctica is full of wildlife, which has adapted to its extreme conditions.There are different types of penguins, flying birds, seals, and whales. But the long Antarctic winter night, which lasts for 182 days (the longest period of continuous darkness on earth), as well as the extreme cold and lack of rainfall, means that few types of plants can survive there. Only two types of flowering plants are found, while there are no trees on the large continent. The rest of the plants are made up of mosses, algae and lichen. Some forms of algae have adapted to grow on ice.3______________________________Most of the ice has been there for thousands of years. As a result, it has bee a window on the past, and can give researchers lots of useful information. Gases and minerals, in the form of volcanic dust trapped in the ice, can tell us a lot about what the worlds climate was like in past ages. Antarctic rocks are also very important for research. Most of them are meteorites from outer space. One rock, known us the “Alien” rock, may contain evidence of extra-terrestrial life.Since most Antarctic rocks arc dark in colour, they stand out against the while background and are easy to identify and collect.4______________________________Antarctica was the last continent to be discovered.But more than two thousand years ago Greek geographers believed that there was a large land mass in the south which balanced the land in the north. They called it Anti-Arktikos, or Antarctica: the opposite of Arctic. When Europeans discovered the continent of America in the 15th century, the great age of exploration began. However, progress to the South Pole was slow. Notuntil the late 18th century did the British explorer James Cook cross the Antarctic Circle, but he never saw land. Then in 1895, a Norwegian called Carstens Borchgrevink became the first man to set foot on the Antarctic mainland. The race to the pole had begun. It was finally reached on 11th December, 1911 by the Norwegian Roald Amundsen.5______________________________Today scientists from many countries travel to Antarctica to study its resources. A spirit of international friendship has replaced the rivalry that existed between many of the earlier explorers. In 1961, a treaty signed by 12 countries, including Britain, France, and the USA, made Antarctica the world's biggest nature reserve. The aim of the treaty is to prevent the mercial and military use of the continent.In particular, it aims to keep Antarctica free from nuclear tests and radioactive waste; to promote international scientific projects; and to end arguments about who owns the land. Today countries representing 80% of the world’s population havesigned the treaty. Antarctica has bee perhaps the most successful symbol of man’s effort s to work togetherfor progress and peace.How Failure Became SuccessOn 8th August, 1914,27 men who had replied to an advertisement in The Times boarded a ship leaving for the Antarctic. The name of the ship was the Endurance and the captain was an Irishman called Ernest Shackleton.The aim of the journey was to cross the frozen continent via the South Pole－a journey of 1,800 miles. Shackleton thought the journey would last six months. But when land came into sight, the Endurance became trapped in the ice and began to break up. Shackleton and his men watched the Endurance sink into the icy sea. They then headed north, pulling three lifeboats behind them.After six days, bad weather forced them to give up and the men set up camp on a sheet of ice which began slowly moving across the Antarctic Circle.They survived on the ice for five months. Then, on16th April, 1915,Shackleton saw land. It was Elephant Island－a large rock with nothing growing on it, butmuch better than a floating piece of ice. When they reached the island, Shackleton came up with an idea－it was a risk but he would have to take it. He andfive men would take one of the lifeboats, and sail 800 miles to South Georgia, where there was a permanent camp. They could then return to rescue the rest of the men.It took Shackleton 17 days to reach South Georgia. Unfortunately he landed on the wrong side of the island, and had to walk 36 hours over mountains to reach the camp. The whale hunters at the campcouldn’t believe their eyes when they saw the si x men walking down from the mountains.Shackleton kept his promise. More than three months later, he returned to ElephantIsland to rescue the crew he had been forced to abandon. He had failed to reach the pole－but he had saved the lives of all his men.Wele to the South Poles!South Poles? How many are there?In fact, there are three South Poles: a ceremonial Pole ,which is on the moving glacier, a geographical or true Pole, and a magnetic Pole.which changes its position according to the movement of the Earth.Is it safe?Because the South Pole is a high altitude site, the glare of the sunlight here is very intense. It’s also reflected by the snow, so if you go outside, remember to wear sunglasses and use suncream.If you don’t, there’s a severe risk that you’ll damage your eyesight or get badly sunburnt.Is it cold?Yes! Be very careful out in the open air! The temperature is between minus 21℃ in the summer and minus 78℃ in the winter, and you can bee numb with cold without realising. There’s heavy frost e ven on the warmest summer days, and if it’s quiet you can hear your breath freeze. So if you leave the station, dress warmly and carry dry clothing and a portable radio.Is there anything good about the weather?The air is very pure, and it doesn’t snow ve ry much－only about four millimetres a year. There’s verylittle wind and the sky is usually clear. It’s possibly the calmest place on Earth.What’s it like to live here?Life is quite abnormal. Suise and sunset e once every six months, and in the winter the total absence of daylight can be tiresome, and for some, depressing. We’re totally isolated except for radio andelectronic munications, as no aircraft can fly herefor about eight months.Where do we live?The South Pole scientific station is situated on a platform of ice, 3,000－4,000 metres high, but under only a few millimetres of snow. We have a minimum of 28 peopleliving here in the winter and a maximum of 125 in the summer. The living quarters are modest with few luxuries,but cosy.There’s a forta ble dormitory for sleeping ,the canteen serves great food, and there's a well-stocked library of DVDs and videos. But showers and laundry are limited, because water is very valuable. We discourage you from smoking except in specific areas. Medical assistance is available in case of an emergency.Any other advice?Remember that conventional equipment doesn’t always work as it should do. If you use an electric drill, the power cord will snap. Photography is tricky too, as film is fragile and the camera batter y doesn’t work in the cold.Don’t leave any rubbish, and don’t forget that the ecology of Antarctica is very delicate, so don’t take any souvenirs home with you, and be careful to leave nothing but footprints.Finally, remember that we’re all visitors to t he South Pole. It’s a privilege, not a right to e tothis extraordinary place.TheTravels of MarcoPoloThe year is 1271 AD. Imagine a 17- year-old boy from Venice, Italy, well- educated and trained for life as a rich trader. He sets off with his father and uncle on a 25-year journey to mysterious, distant lands that most people in Europe have never heard of. While on their journey buying and selling spices, silks and jewels, they befriend one of the most powerful men on Earth, Kubla Khan.The boy’s name was Marco Polo and many years later a book about his travels was published which made him famous. Marco Polo told his fantastic stories to a writer named Rustichello who wrote them down for him. This man was well- known for his stories and romantic tales of the legendary English King Arthur, but so many people doubted the reliability of his book The Travels of Marco Polo. However, Chinese historians have found obscure names and facts in the book that could only have been known to someone intimate with the country.Many of Marco’s stories were about China and its people. He told stories about the towns, cities and populations in great detail. He described the amazing things he saw in China such as paper money and black stone that burned (coal). With very littlecontact between China and the West, it is not surprising that people in a rich powerful place like Venice could not believe his stories, nor in the ideaof huge, rich city states inhabited by millions of people. There could surely be no parison with Venice?A general myth has grown up around Marco Polo that he introduced such things as spaghetti and ice cream from China to the West. There is no truth to any of these claims and actually they are not mentioned in Marco Polo’s book.However, Marco Polo’s book is still a unique insight for its age. Most importantly it was a great influence for many future travellers.Christopher Columbus left behind a well- worn copy that he read as inspirationon his own voyages to America.Last Part of Journey for First Women to Cross Antarctica1___________________The first two women to cross the Antarctic continenton foot have begun the last part of their long journey. Liv Arnesen, who is 47 and es from Norway, and Ann Bancroft, who is a 45-year-old from the USA, have been skiing across the ice since 13th November. They have been using sails to help them pull their equipment, which weighs 110 kilos, behind them.2__________________On Sunday they reached the Ross Ice Shelf, 90 daysafter they first left home. The Ross Ice Shelf is aflat piece of floating ice which is bigger than France. There are 750 kilometres of dangerous ice left tocross before they reach McMurdo Station. They must arrive there by 22nd February in order to board the ship which will be waiting for them. If they are late, the ship risks being trapped in the ice.3_________________。