bbc英语听力练习：新行星中的外星球
行星地球第三集中英文
行星地球第三集中英文In the third episode of the renowned documentary series "Planet Earth," we are taken on a breathtaking journey through the diverse and dynamic landscapes of our home planet. This episode, titled "Oceans Deep and Mountains High," focuses on the extreme environments of the Earth's oceans and landmasses, revealing the remarkable adaptations and survival strategies of the creatures that inhabit these regions.The episode begins with a plunge into the deepest recesses of the ocean, where the pressure and darkness are almost unbearable. Despite these challenges, an abundanceof life thrives in these depths. We are introduced to the giant squid, a mysterious creature that has fascinated and terrified humans for centuries. Its size and adaptability are astonishing, and its place in the oceanic food chain is crucial.As the episode progresses, we ascend to the surface of the ocean, where the diversity of life is even more apparent. From the bustling coral reefs to the serene open waters, the ocean is home to an incredible array of species.The episode highlights the symbiotic relationship between coral and algae, and the crucial role they play in maintaining the health of the reef ecosystem.The episode then turns its focus to the tallest peaks of the Earth, where life must adapt to extreme temperatures and limited resources. We are introduced to the snow leopard, a beautiful predator that hunts in the harshest of environments. Its stealth and agility are essential for survival in this harsh landscape.Throughout the episode, the narrator emphasizes the interconnectedness of all life on Earth. The health of the oceans and the mountains is crucial to the well-being of the planet as a whole. The creatures featured in this episode, whether they dwell in the deepest ocean or the highest mountains, are all part of a larger, interdependent system.The episode concludes with a reminder of the fragility of this system. Climate change, pollution, and other anthropogenic factors are threatening the stability of the Earth's ecosystems. The creatures featured in this episodeare facing unprecedented challenges, and their survival is inextricably linked to our own.In summary, the third episode of "Planet Earth" is a remarkable testament to the diversity and resilience oflife on our planet. It reminds us of the interconnectedness of all life and the crucial role we play in maintaining the health of the Earth's ecosystems. As we face the challenges of the 21st century, it is important to remember the lessons taught by this episode and to act responsibly to protect the beauty and diversity of our home planet.**探索地球的奥秘：行星地球第三集深度解析**在备受赞誉的纪录片系列《行星地球》的第三集中，我们踏上了一段令人叹为观止的旅程，穿越了我们这个家园星球的多样化和动态化景观。
初三英语宇宙探索发现单选题50题
初三英语宇宙探索发现单选题50题1. The Earth is a ______ that orbits around the Sun.A. starB. planetC. satellite答案：B。
本题考查对宇宙天体的基本概念以及相关英语单词的掌握。
选项A“star”指恒星，像太阳就是恒星，而地球不是恒星。
选项B“planet”是行星，地球是围绕太阳公转的行星，符合题意。
选项C“satellite”是卫星，通常是围绕行星转动的天体，地球不是卫星。
2. Which of the following is a natural satellite of the Earth?A. The MoonB. MarsC. Venus答案：A。
本题重点在于对地球的天然卫星这一概念的考查以及相关天体名称的英语表达。
选项A“The Moon”月球是地球的天然卫星。
选项B“Mars”火星是一颗行星，不是地球的卫星。
选项C“Venus”金星也是一颗行星，不是地球的卫星。
3. Stars are huge celestial bodies that can produce their own ______.A. waterB. lightC. air答案：B。
这题考查恒星的特性以及对应的英语单词。
恒星是巨大的天体，它们能够自己产生光。
选项A“water”水，恒星不会产生水。
选项C“air”空气，恒星也不会产生空气，选项B“light”光，符合恒星的特性。
4. Among the following planets, which one is closest to the Sun?A. MercuryB. JupiterC. Neptune答案：A。
本题考查太阳系行星与太阳的距离相关知识以及行星名称的英语。
在太阳系中，水星是距离太阳最近的行星。
选项B“Jupiter”木星距离太阳较远。
选项C“Neptune”海王星是距离太阳非常远的行星。
三年级英语太空旅行单选题30题答案解析版
三年级英语太空旅行单选题30题答案解析版1.There is a big star in the sky. It is very bright. What color is the star?A.redB.blueC.yellowD.green答案：C。
解析：一般我们认知中的星星很多是黄色的，选项 A 红色一般不是星星常见的颜色，选项B 蓝色也不是星星的颜色，选项D 绿色也不符合星星的颜色特征。
2.The planet is very beautiful. It is round. What is the planet like?A.squareB.triangleC.circleD.rectangle答案：C。
解析：planet 是圆形的，选项C 是圆形，选项A 是正方形，选项B 是三角形，选项D 是长方形，都不符合planet 的形状特征。
3.There are many stars in the sky. They are very small. Are the stars big or small?A.bigB.smallC.tall答案：B。
解析：题干中说星星很小，所以答案是small，选项A big 与题干不符，选项C tall 和D short 一般用来形容身高，不适合形容星星。
4.The spaceship is flying in the space. It is very fast. Is the spaceship slow or fast?A.slowB.fastC.longD.short答案：B。
解析：题干中说飞船飞得很快，所以答案是fast，选项 A slow 与题干不符，选项C long 和D short 一般用来形容长度，不适合形容飞船速度。
5.There is a moon in the space. It is very bright. What color is the moon?A.whiteB.blackC.pinkD.orange答案：A。
新概念英语第四册第35课-Space odyssey
新概念英语第四册第35课:Space odysseyLesson 35 Space odyssey太空探索First listen and then answer the following question.听录音，然后回答以下问题。
When will it be possible for us to think seriously about colonising Mars?The Moon is likely to become the industrial hub of the Solar System, supplying the rocket fuels fro its ships, easily obtainable from the lunar rocks in the from of liquid oxygen. The reason lies in its gravity. Because the Moon has only an eightieth of the Earth s mass, it requires 97 per cent less energy to travel the quarter of a million miles from the Moon to Earth-orbit than the 200 mile-journey from Earth s surface into orbit!月球很可能成为太阳系的工业中心。
从月球上的岩石中很容易提炼出液态氧，作为航天飞船的燃料。
其原因在于月球的重力。
因为月球的重只有地球的1/8，因此，从月球到地球的25万英里所消耗的能量要比从地球表面进入地球轨道的200英里所耗能量少97%。
This may sound fantastic, but it is easily calculated. To escape from the Earth in a rocket, one must travel at seven miles per second. The comparable speed from the Moon is only 1.5 miles per second. Because the gravity on the Moon s surface is only a sixth of Earth s (remember how easily the Apollo astronauts bounded along), it takes much less energy to accelerate to that 1.5 miles per second than it does on Earth. Moon-dwellers will be able to fly in space at only three per cent of the cost of similar journeys by their terrestrial dwellers will be able to fly in space at only three per cent of the cost of similar journeys by their terrestrial cousins.这点听起来令人难以置信，但却很容易计算出来。
(完整word版)BBC经典-《行星地球》英文解说词(全集)
行星地球英文解说词第1集PLANET EARTH From Pole to PoleA hundred years ago there were one and a half billion people on Earth. Now, over six billion crowd our fragile planet Earth. But even so, there are still places barely touched by humanity. This series will take to the last wildernesses and show you the planet Earth and its wildlife as you have never seen them before. Imagine our world without sun. Male Emperor penguins are facing the nearest that exists on planet Earth Earth - winter in Antarctica. It's continuously dark and temperatures drop to minus seventy degrees centigrade. The penguins stay when all other creatures have fled because each guards a treasure: a single egg rested on the top of its feet and kept warm beneath the downy bulge of its stomach. There is no food and no water for them, and they will not see the sun again for four months. Surely no greater ordeal is faced by any animal. As the sun departs from the Antarctic it lightens the skies in the far north. It's March and light returns to the high Arctic, sweeping away four months of darkness. A polar bear stirs. She has been in her den the whole winter. Her emergence marks the beginning of spring. After months of confinement underground she toboggans down the slope. Perhaps to clean her fur, perhaps for sheer joy. Her cubs gaze out of their bright new world for the very first time. The female calls them, but this steep slope is not the easiest place to take yourfirst steps. But they are hungry and eager to reach their mother, who's delayed feeding them on this special day. Now she lures them with the promise of milk, the only food the cubs have known since they were born deaf and blind beneath the snow some two months ago. Their mother has not eaten for five months and has lost half her body weight. Now she converts the last of her fat reserves into milk for her cubs. The spring sun brings warmth but also a problem for the mother. It starts to melt the sea ice. That is where she hunts for the seal she needs to feed her cubs. And she must get there before the ice breaks up. For now though it's still minus thirty degrees and the cubs must have the shelter of the den. It's six days since the bears emerged and spring is advancing rapidly. But even now blizzards can strike without warning. Being so small, the cubs are easily chilled and they will be more comfortable resting in the den. But their mother must keep them out and active. She's becoming weak from hunger and there's no food on these nursery slopes. The sea ice still holds firm, but it won't last much longer. Day 10, and the mother has led her cubs a mile from the den. It's time to put them to the test. They've grown enormously in confidence, but they don't have their mother's sense of urgency. At last it seems that they're ready for their journey and they're only just in time, for a few miles from the coast the ice is already splitting. Now the mother can start hunting for the seals they must have, but she's leading her cubs into a dangerous new world. Nearly half of all cubs die in their first year out on the ice. Summer brings 24 hours of sunlight and the thawing shifting landscape.Further south the winter snows have almost cleared from the Arctic tundra. Northern Canada's wild frontier. Here nature stages one of her greatest dramas - Every year three million caribou migrate across the Arctic tundra. The immensity of the herd can only be properly appreciated from the air. Some herds travel over 2,000 miles a year in search of fresh pastures. This is the longest overland migration made by any animal. They're constantly on the move. Newborn calves have to be up and running the day they are born. But the vast herds do not travel alone. Wolves. Packs of them, eight to ten strong, shadow the migration. And they are hungry. It's the newly born calves that they are after. Running directly at the herd is a ploy to generate panic. The herd breaks up and now it's easier to target an individual. In the chaos a calf is separated from its mother. The calf is young, but it can outrun the wolf if only it manages to keep its footing. At this stage the odds are even - either the caribou will make a mistake or after a mile the wolf will give up. Midsummer on the tundra and the sun does not set. At these latitudes the sun's rays are glancing and not enough of their energy reaches the ground to enable trees to grow. You'll need to travel 500 miles south from here before that is possible. These stunted shrubs mark the tree line - the beginning of the boreal forest - the taiga. The needle-shaped leaves of the conifers are virtually inedible so this forest supports very little animal life. It's a silent place where the snow is unmarked by footprints. In the Arctic winter snow forms a continuous blanket across the land. But as spring creeps up from the south the taiga is unveiled. This vast forest circling theglobe contains a third of all the trees on Earth and produces so much oxygen it changes the composition of the atmosphere. As we travel south so the sun's influence grows stronger and at 50 degrees of latitude a radical transformation begins. Summers here are long enough for broadleaf trees to replace conifers. Broadleaves are much easier to eat and digest so now animals can collect their share of the energy that has come from the sun. It's summer and these forests are bustling with life. But the good times will not last. Broad leaves must be shed in winter for their damage by frost. As they disappear, so the land becomes barren with little for animals to eat. The inhabitants must migrate, hibernate, or face months of near starvation. The Amur leopard - the rarest cat in the world. Here, in the deciduous forests of eastern Russia the winter makes hunting very difficult. Pray animals are scarce, and there's no concealing vegetation. The cub is a year old and still dependent on its mother. Deer are frequent casualties of the harsh winter and these leopards are not above scavenging from a corpse. African leopards could never survive here, but the Russian cats have thick fur to shield them from the cold. There are only forty Amur leopards left in the wild and that number is falling. Like so many creatures, the cats have been pushed to the very edge of extinction by hunting and the destruction of their habitat. The Amur leopard symbolises the fragility of our natural heritage. The future of an entire species hangs on survival of a tiny number of mothers like this one. All animals, rare or common, ultimately depend for their energy on the sun. In Japan the arrival of the cherry blossomannounces the beginning of spring. The sun's energy brings colour to the landscape. The earth, as it makes its annual journey around the sun, spins on a tilted axis. And it's this tilt that creates the seasons. The advance of the seasons brings constant change. As the sun's influence diminishes in the north, so the deciduous forests of America begin to shut down losing their leaves in preparation for the dark cold months ahead. One season hands over to another. Some organisms thrive on decay, but most must make special preparations for winter and a life with little sun. Whole populations of animals are now forced to travel great distances in pursuit of food and warmth. 300,000 Baikal teal gather to escape from the Siberian winter by migrating south to Korea - the world's entire population in a single flock. But there are parts of the world that have no seasons. In the tropics the sun's rays strike the earth head on and their strength is more or less constant all year round. That is why the jungle grows so vigourously and supports so much life. This forest covers only 3 percent of the planet's surface, but it contains more than 50 percent of all its plants and animals. The canopy is particularly rich. There are monkeys, birds and millions of species of insects, exactly how many we have no idea. The character of the forest changes as we descend, becoming ever darker and damper, favouring different kinds of animals and plants. Less than 2 percent of the sunlight reaches the floor, but even here there is extraordinary variety. In the great island of New Guinea there are 42 different species of birds of paradise, each more bizarre than the last. This forest is so rich thatnourishing food can be gathered very quickly. That leaves the male six-plumed bird of paradise with time to concentrate on other matters like tidying up his display area. Everything must be spick and span. All is ready. Very impressive, but no one is watching. The superb bird of paradise calls to attract a female. And he has more luck. But what does he have to do to really impress her? She retires to consider her verdict. It's hard not to feel deflated when even your best isn't good enough. The sun influences life in the oceans just as it does on land. Its richest parts are those where waves and currents bring fertilising nutrients to surface waters that are bathed in sunlight. The seas off the Cape in South Africa have this magic recipe and are hugely productive. Summer is the time of plenty and it's now that the seals start to breed. The strike of a great white shark lasts a mere second. Slowing it down forty times reveals the technique and immense strength of this massive predator. If surprise fails, there will be a chase. The shark is faster on a straight course but it can't turn as sharply as the seal, its agility versus power. Once the seals have finished breeding the giant sharks will move on. It's now becoming clear that great whites migrate thousands of miles across the oceans to harvest seasonal abundances in different seas. The sun, beating down on tropical waters, powers the weather systems of the globe. Moisture evaporates from the warming ocean and rises to create great storms. The winds generated out at sea sweep inland across the continents. As they travel across the Sahara they create the biggest of all sand storms blowing sand halfway round the world to fertilize the Amazonjungle. Winds blowing across the Indian Ocean collect moisture and sweep northwards towards the Himalayas. As the air rises, so it cools. The water it carries condenses into clouds and then falls as the life giving rains of the monsoon. So air currents powered by the sun carry wet air to the middle of continents. Without water there can be no life, but its distribution over the land is far from even. Deserts cover one third of the land's surface and they're growing bigger every year. This is the Kalahari Desert in Southern Africa. It's the dry season and thousands of elephants have started to travel in desperate search for water. All across Southern Africa animals are journeying for the same reason. Buffalo join the great trek. Nowhere else on Earth are so many animals on the move with the same urgent purpose. They're all heading for the swamps of the Okavango, a vast inland delta. At the moment it is dry, but water is coming. The travellers are hampered by dangerous dust storms. Females and calves can easily get separated from the main herd. For this pair sanctuary lies in the patch of woodland a few miles ahead. They can't rest until they reach it. The main has already got there safely. Finally, the stragglers emerge from the dust. The exhausted calf is still blinded by sand. Its mother does everything possible to help it. The storm is now subsiding, but not all the elephants have been so lucky. One youngster has got lost. Thirsty and exhausted, it follows the tracks of its mother, but sadly in the wrong direction. At the peak of the dry season in the Kalahari water arrives in the Okavango. It fell as rain a thousand miles away in the highlands of Angola and has taken nearly five months to reachhere. The water drives out insects from the parched ground, which are snapped up by plovers. Catfish, travelling with the flood, collect any drowning creatures the birds have missed. It's a seasonal feast for animals of all kinds. Birds are the first to arrive in any numbers - water cranes, then black storks. Behind the birds come buffalo. After weeks of marching their trek is coming to an end. As the water sweeps into the Okavango a vast area of the Kalahari is transformed into a fertile paradise. Nowhere on our planet Earth is the life giving power of water so clearly demonstrated. The Okavango becomes criss-crossed with trails as animals move into its heart. The new arrivals open up paths like arteries along which water flows, extending the reach of the flood. This is an Africa rarely seen - a lush water world. Some creatures are completely at home here. These are lechwe - antelope with hooves that splay widely, enabling them to move its speed through the water. For others the change is far less welcome. Baboons are somewhat apprehensive bathers. The water brings a season of plenty for all animals. Hunting dogs. These are now among the rarest of Africa's mammals, but then nonetheless the continent's most efficient predators. Their secret is teamwork. Impala are their favourite prey. They start to hunt and the pack splits up. An aerial viewpoint gives a new insight into their strategy. As the dogs approach their prey they peel off to take up separate positions around their target. They seem to form a cordon around the impala. Moving in total silence they take up their positions. Those ears can detect the slightest rustle. The hunt is on. Three dogs close in on one impala.Missed. The lead dog drives the impala towards the hidden flankers. Anticipating their line the leader cuts the corner and joins a flanker for the final assault. It's all or nothing. One on one. The dog has stamina, the impala has speed. Leaping into the lake is an act of desperation - impala can barely swim. The dogs know their prey must come out or drown - now it's a waiting game. The rest of the pack are calling. They've made a kill in the forest and this is an invitation to join in the meal. The impala is in luck. A pack this size kills once a day and everything is shared. And this impala is reprieved. The elephants are nearing the end of their long journey. After weeks of marching they're desperately tired. The matriarch can smell water and encourages the herd to make one last effort. The youngsters are exhausted but their mothers have made this journey before and they know that they're close to water. After many hundreds of miles they've arrived. The lives of these elephants are dominated by the annual rhythm of wet and dry, a seasonal cycle created by the sun. At the southern end of the earth, after four months of total darkness, the sun once more rises over Antarctica. Now at last the Emperor penguins abandon their huddle. The males are still carrying the precious eggs that they've cherished throughout the Antarctic winter. With the returning sun the eggs hatch. Other birds have not even arrived. but the Emperors by enduring the long black winter have given their chicks a head start. These youngsters are now ready and eager to make the most of the brief Antarctic summer.第2集PLANET EARTH MountainsHuman beings venture into the highest parts of our planet at their peril. Some might think that by climbing a great mountain they have somehow conquered it, but we can only be visitors here. This is a frozen alien world. This is the other extreme - one of the lowest hottest places on Earth. It's over a hundred metres below the level of the sea. But here a mountain is in gestation. Pools of sulphuric acid are indications that deep underground there are titanic stirrings. This is the Danakil Depression in Ethiopia, lying within a colossal rent of the earth's surface where giant land masses are pulling away from one another. Lava rises to the surface through this crack in the crust creating a chain of young volcanoes. This one, Erta Ale, is today the longest continually erupting volcano on the planet, a lake of lava that has been molten for over a hundred years. These same volcanic forces also created Ethiopia's highlands. 70 million years ago this land was just as flat and as deep as the Danakil Depression. Molten lava rising from the earth's core forced up a huge dome of rock 500 miles wide, the roof of Africa. Over millennia, rain and ice carved the rock into a landscape of spires and canyons. These summits, nearly 3 miles up, are home to some very remarkable mountaineers Gelada baboons. They are unique to the highlands of Ethiopia. The cliffs where they sleep are for expert climbersonly, and Gelado certainly have the right equipment. the strongest fingers of any primate and an utterly fearless disposition. But you need more than a head for heights to survive up here. A day in a Gelado's life reveals how they've risen to the challenge. For all monkeys morning is grooming time, a chance to catch up with friends. But, unlike other monkeys, Gelados chatter constantly while they do it. It's a great way to network while your hands are busy. But these socials can't go on for too long. Gelados have a busy daily schedule and there's work to be done. Most monkeys couldn't live up here. There's no food and few insects to feed on. But Gelados are unique they're the only monkeys in the world that live almost entirely on grass. They live in the largest assemblies formed by any monkeys. Some groups are 800 strong and they crop the high meadows like herds of wildebeest. The Gelados graze alongside Walia ibex, which are also unique to these highlands. These rare creatures are usually very shy but they drop their guard when the Gelados are around. You might expect that grazers would avoid each other's patch but this is a special alliance from which both partners benefit. It's not so risky to put your head down if others are on the lookout. Ethiopian wolves - they won't attempt an attack in broad daylight. But at dusk the plateau becomes a more dangerous place. With the grazing largely over there's a last chance to socialise before returning to the sleeping cliffs. An early warning system puts everyone on the alert. Their day ends as it began, safe on the steep cliffs. The Ethiopian volcanoes are dormant, but elsewhere others still rage. Volcanoes form the backbone ofthe longest mountain chain on our planet - the Andes of South America. This vast range stretches 5,000 miles from the Equator down to the Antarctic. It formed as the floor of the Pacific Ocean slid beneath the South American continent, buckling its edge. At the southern end stand the mountains of Patagonia. It's high summer, but the Andes have the most unstable mountain weather on the planet and storms can erupt without warning. Temperatures plummet and guanacos and their newborn young must suddenly endure a blizzard. Truly, all seasons in one day... A puma - the lion of the Andes. Pumas are usually solitary and secretive. To see a group walking boldly in the open is extremely rare. It's a family - a mother with four cubs. She has just one brief summer in which to teach them their mountain survival techniques. Rearing four cubs to this age is an exceptional feat, but she does have an excellent territory, rich in food and water. Although the cubs are now as large as their mother, they still rely on her for their food. It will be another year before the cubs can hunt for themselves. Without their mother's skill and experience they would never survive their first winter. Battered by hurricane force winds, these slopes are now lifeless. Further north, they hold other dangers. Moving at 250 miles an hour, an avalanche destroys everything in its path. In the American Rockies a 100,000 avalanches devastate the slopes every winter. This huge mountain chain continues the great spine that runs from Patagonia to Alaska. The slopes of the Rockies, bleak though they are, provide a winter refuge for some animals. A mother grizzly emerges from her den after six months'dozing underground. Her two cubs follow her and take their first steps in the outside world. These steep slopes provide a sanctuary for the cubs. A male bear would kill and eat them given the chance. But big animals find it difficult to get about here. Males may be twice the size of a female and even she can have problems. Her cubs, however, make light of the snow and of life in general. But the mother faces a dilemma: it's six months since she last fed and her milk is starting to run dry. She must soon leave the safety of these nursery slopes and lead her cubs away from the mountain. If she delays, the whole family will risk starvation. Summer reveals the true nature of the Rockies. Stripped of snow, the peaks bear their sculpted forms. Only now can mountaineers reclaim the upper reaches. Two miles up the crumbling precipices seem devoid of life. But there are animals here - a grizzly bear. It seems to be an odd creature to find on these high rocky slopes. It's hard to imagine what could have attracted it here. At this time of the year bears should be fattening up for the winter. Yet they gather in some numbers on these apparently barren slopes. They're searching for a rather unusual food - moths. Millions have flown up here to escape the heat of the lowlands and they're now roosting among the rocks. Moths may seem a meager meal for a bear, but their bodies are rich in fat and can make all the difference in a bear's annual struggle for survival. Another battle is being waged here but on a much longer timescale. These loose boulders are the mountain's crumbling bones. The Rockies are no longer rising but slowly disintegrating. All mountains everywhere are being worn down byfrost, snow and ice. The Alps were raised some 15 million years ago as Africa, drifting northwards, collided with the southern edge of Europe. These spires are the eroded remains of an ancient seabed that once stretched between the two continents. But these are just the Alpine foothills. The range at its centre rises to 3 miles high and is crowned with permanent snows. The Matterhorn, its summit too steep to hold a snow field. Mont Blanc - the highest peak in Western Europe. The distinctive jagged shapes of the Alps were carved by those great mountain sculptors - the glaciers. Immense rivers of moving ice, laden with rock, grind their way down the mountains, gouging out deep valleys. They're the most powerful erosive force on our planet. A moulin - a shaft in the ice opened by melt water as it plunges into the depths of the glacier. Like the water running through it, the ice itself is constantly moving, flowing down the valley with unstoppable force. Alpine glaciers may seem immense, but they're dwarfed by those in the great ranges that divide the Indian subcontinent from Tibet. This is the boulder strewn snout of the giant Baltoro glacier in the Karakoram mountains of Pakistan. It's the biggest mountain glacier on Earth - 43 miles long and over 3 miles wide. This huge ice-filled valley is so large it's clearly visible from space. This is the greatest concentration of peaks over 5 miles high to be found anywhere on Earth. They're the most dangerous mountains of all. K2 and her sister peaks have claimed more lives than any others. The peaks here rise so precipitously, the glaciers are so steep and crevassed that few except the most skilled mountaineers can penetratethese ranges. Markhor gather for their annual rut. Males must fight for the right to breed, but on these sheer cliffs any slip by either animal could be fatal. A snow leopard - the rarest of Himalayan animals. It's a female returning to her lair. These are the first intimate images of snow leopard ever filmed in the wild. She greets her one year old cub. Her den is well chosen. It has exceptional views of the surrounding cliffs. On these treacherous slopes no hunter other than the snow leopard would have a chance of catching such fragile prey. A female with young makes an easier target. Her large paws give an excellent grip and that long tail helps her balance. Silently she positions herself above her prey. She returns with nothing. Golden eagles patrol these cliffs in search of the weak or injured. With a 2 metre wing span this bird could easily take a young markhor. Eagles hunt by sight and the thickening veil of snow forces them to give up. For the leopard the snow provides cover and creates an opportunity. The worsening weather dampens the sound of her approach allowing her to get within striking distance. It was an act of desperation to try and catch such a large animal. Wolves have made a kill giving other hunters a chance to scavenge. The worst of the blizzard brings success for the snow leopard, but having descended so far to make the kill she has a grueling climb to get back to her lair. The cub must be patient. It'll be a year before it has the strength and skill to kill for itself on these difficult slopes. The snow leopard is an almost mythical creature, an icon of the wilderness, an animal few humans have ever glimpsed for its world is one we seldom visit. TheKarakoram lie at the western end of a range that stretches across a tenth of our planet - the Himalayas. These, the highest mountains of the world, like other great ranges, were created by the collision of continents. Some 50 million years ago India collided with Tibet thrusting up these immense peaks, which are still rising. This vast barrier of rock and ice is so colossal it shapes the world's climate. Warm winds from India, full of moisture, are forced upwards by the Himalayas. As the air rises so it cools, causing clouds to form and the monsoon is born. At high altitudes the monsoon rains fall as snow. Here, at the far eastern end of the range in China, one inhabitant endures the bitter winters out in the open. Most other bears would be sleeping underground by now, but the giant panda can't fatten up enough to hibernate. Its food, bamboo, on which it totally relies has so little nutritional value that it can't build up a store of fat like other bears. Most of the creatures here move up or down the slopes with the seasons but the panda is held captive by its diet for the kind of bamboo it eats only grows at this altitude. But these forests hold fewer challenges for the more mobile. The golden snap-nosed monkey, like the giant panda, lives only in China. Their thick fur allows them to survive at greater altitudes than any other monkey and when the cold bites they have these upper slopes to themselves. Even if you have a warm coat it apparently helps to surround yourself with as many layers as possible. But at least these monkeys have a choice - if they tire of tree bark and other survival food they can always descend to lower warmer altitudes and not return there till spring. As thesnows retreat trees come into bloom. Cherry blossom. Rhododendrons - here in their natural home they form great forests and fill the landscape with the covers of a new season. These forests are a host to a rich variety of springtime migrants. Beneath the blooms - another display. It's the mating season for oriental pheasants, Himalayan monal, tragopan and blood pheasant. Musk deer make the most of a short flash of spring foods. This male smells a potential mate. The red panda, rarely glimpsed in the wild. It was once considered a kind of raccoon, but is now believed to be a small mountain bear. By midsummer its larger, more famous relative, has retreated into a cave. A giant panda nurses a tiny week old baby. Her tender cleaning wards off infection. She won't leave this cave for three weeks, not while her cub is so utterly helpless. Progress is slow for milk produced on a diet of bamboo is wretchedly poor. Four weeks old and the cub is still blind. Its eyes do not fully open until three months after birth, but the chances of the cub reaching adulthood are slim. The struggle of a giant panda mother to raise her cub is a touching symbol of the precariousness of life in the mountains. On the highest summits of our planet nothing can live permanently. The highest peak of all, Mount Everest, five and a half miles above sea level and still rising - the roof of our world. Of those humans who've tried to climb it one in ten have lost their lives. Those that succeed can stand for only a few moments on its summit. The Nepalese call it 'a mountain so high no bird can fly above it.' But each year over 50,000 demoiselle cranes set out on one of the most challenging migrations on。
2024届高考英语外刊听力训练：宇航员的大脑在太空飞行中会变形 课件
astronauts spent two weeks as space shuttle crew members, and 14
spent six months on the International Space Station (省音：两个
读作一个较长的 音). All of them experienced increases and
试题解析
3. What will the research help doing? A. Building up our strength. B. Treating sleep disorders.
C. Treating brain damage.
答题线索： They could also help those with a build-up of fluid in the brain, which can lead to brain damage. 推理判断题 文中提到此次研究发现可以帮助解决脑积液的问题，而脑积液 会导致脑损伤。由此可推断出，这些发现可以帮助治疗脑损伤。
PART 04
语音现象
YUYINXIANXIANG
语音现象
Researchersห้องสมุดไป่ตู้from (
) the University of Michigan in the
USA have found that the brain of astronauts changes shape during
spaceflight. It is the first study to look into how the brain changes
decreases in the size of different parts of the brain.
新编大学英语综合教程1unit6
Unit 6 A World of MysteryIn-Class Reading The Bermuda Triangle百慕大三角1 1945年12月5日，佛罗里达州的劳德代尔堡，天气晴朗，由五架美国海军飞机组成的第19飞行分队从这里起飞。
机上共有14名机组人员。
飞机状况良好；机上装有当时最好的设备，包括罗盘和无线电设备，还携带有救生筏。
飞机可以在水上漂浮90秒钟。
飞机起飞一个半小时后，劳德代尔堡的指挥塔台听到了从其中一架飞机传来的无线电信息。
2 “我不知道我们现在所处的位置。
”3 之后飞机再也无法和指挥塔台通话，但是飞机之间可以通话，而且指挥塔台也能听到他们的通话。
4 “磁罗盘简直疯了。
”5 “我们完全迷失了方向。
”6 从这之后没有收到其他任何信息。
再也没有其他任何人收到过这些飞机的消息或看到过它们。
300架飞机和许多船只搜索了该地区，但没有找到第19飞行分队的任何踪迹。
而且其中一架被派去搜寻的飞机也彻底失踪了。
7 这些飞机是在西大西洋上一个非常神秘的地方失踪的，在这里已经发生了许多奇怪的事件。
这种神秘现象在1945年之前很久就已经出现了，而且自那一年以来，又有许多其他船只和飞机在这一地区失踪。
这一地区被称为百慕大三角，是大西洋上一个巨大的三角形海域，其北端是百慕大岛。
8 飞机和船只在世界的其他地方也会失踪，但是百慕大三角内发生的失踪事件要比其他地区多。
多年来科学家们和其他人士对这一神秘现象感到困惑不解。
人们做了许多努力，试图解释为什么有这么多的人、飞机和船只在这里失踪。
9 作家约翰·斯宾塞认为，这些船只和飞机被来自另一行星上的飞碟或不明飞行物从海上和空中劫走了。
他的看法是，既然宇宙里有数百万其他行星，那么在宇宙中的某些地方肯定存在其他有智慧的生物。
这些生物喜欢收集人类及其设备，以便仔细观察研究。
10 另一种理论认为，该地区的地理状况是造成船只和飞机失踪的罪魁祸首。
百慕大位于地震带。
托福阅读tpo51R-2原文+译文+题目+答案+背景知识
TPO51阅读-2Surface Fluids on Venus and Earth原文 (1)译文 (2)题目 (3)答案 (8)背景知识 (10)原文Surface Fluids on Venus and Earth①A fluid is a substance, such as a liquid or gas, in which the component particles (usually molecules) can move past one another. Fluids flow easily and conform to the shape of their containers. The geologic processes related to the movement of fluids on a planet's surface can completely resurface a planet many times. These processes derive their energy from the Sun and the gravitational forces of the planet itself. As these fluids interact with surface materials, they move particles about or react chemically with them to modify or produce materials. On a solid planet with a hydrosphere and an atmosphere, only a tiny fraction of the planetary mass flows as surface fluids. Yet the movements of these fluids can drastically altera planet. Consider Venus and Earth, both terrestrial planets with atmospheres.②Venus and Earth are commonly regarded as twin planets but not identical twins. They are about the same size, are composed of roughly the same mix of materials, and may have been comparably endowed at their beginning with carbon dioxide and water. However, the twins evolved differently largely because of differences in their distance from the Sun. With a significant amount of internal heat, Venus may continue to be geologically active with volcanoes, rifting, and folding. However, it lacks any sign of a hydrologic system (water circulation and distribution): there are no streams, lakes oceans or glaciers. Space probes suggest that Venus may have started with as much water as Earth, but it was unable to keep its water in liquid form. Because Venus receives more heat from the Sun, water released from the interior evaporated and rose to the upper atmosphere where the Sun's ultraviolet rays broke the molecules apart. Much of the freed hydrogen escaped into space, and Venus lost its water. Without water, Venus became less and less like Earth and kept an atmosphere filled with carbon dioxide. The carbon dioxide acts as a blanket, creating an intense greenhouse effect and driving surface temperatures high enough to melt lead and to prohibit the formation of carbonate minerals. Volcanoes continually vented more carbon dioxide into the atmosphere. On Earth,liquid water removes carbon dioxide from the atmosphere and combines it with calcium, from rock weathering, to form carbonate sedimentary rocks. Without liquid water to remove carbon from the atmosphere, the level of carbon dioxide in the atmosphere of Venus remains high.③Like Venus, Earth is large enough to be geologically active and for its gravitational field to hold an atmosphere. Unlike Venus, it is just the right distance from the Sun so that temperature ranges allow water to exist as a liquid, a solid, and a gas. Water is thus extremely mobile and moves rapidly over the planet in a continuous hydrologic cycle. Heated by the Sun, the water moves in great cycles from the oceans to the atmosphere, over the landscape in river systems, and ultimately back to the oceans. As a result, Earth's surface has been continually changed and eroded into delicate systems of river valleys - a remarkable contrast to the surfaces of other planetary bodies where impact craters dominate. Few areas on Earth have been untouched by flowing water. As a result, river valleys are the dominant feature of its landscape. Similarly, wind action has scoured fine particles away from large areas, depositing them elsewhere as vast sand seas dominated by dunes or in sheets of loess (fine-grained soil deposits). These fluid movements are caused by gravity flow systems energized by heat from the Sun. Other geologic changes occur when the gases in the atmosphere or water react with rocks at the surface to form new chemical compounds with different properties. An important example of this process was the removal of most of Earths carbon dioxide from its atmosphere to form carbonate rocks. However, if Earth were a little closer to the Sun, its oceans would evaporate; if it were farther from the Sun, the oceans would freeze solid. Because liquid water was present, self-replicating molecules of carbon, hydrogen, and oxygen developed life early in Earth's history and have radically modified its surface, blanketing huge parts of the continents with greenery. Life thrives on this planet, and it helped create the planet's oxygen- and nitrogen-rich atmosphere and moderate temperatures.译文金星和地球的表面流体①流体是一种物质，例如液体或气体，其中的成分粒子（通常是分子）可以相互移动。
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bbc英语听力练习：新行星中的外星球Eight new planets 新行星中的“外星球”
天文学家说在遥远的太阳系外最新发现的八颗新行星中的一颗是“最类似地球的外星球”。
这八颗类地行星是由美国国家航空航天局（NASA）的开普勒太空望远镜所探测出的。
此探测结果是在美国天文
学会的一次会议上公布的。
以下是 BBC 记者 Jonathan Webb 的报道：
Spotting ‘Alien Earths’ is the reason the Kepler spacecraft was launched six years ago. It looks deep into space for tell-tale dips in the brightness of faraway stars.
Eight new so-called exoplanets were revealed here, taking Kepler’s overall tally1 to more than 1,000. But only very
few planets from that total are thought to be Earth-like and habitable, sitting in a temperate2 Goldilocks zone around
their various suns.
One of the new arrivals, called Kepler 438b, is the most like our home that astronomers3 have ever seen： just 12% bigger than Earth and 40% warmer.
They say if we could stand on its surface, nearly 500
light years away, the sky would be red because of the dwarf4 star it has for a sun.
Glossary 词汇表
tell-tale
泄露内情的
faraway
遥远的
exoplanet
外星球
tally
累计数字，总数
habitable
可居住的
Goldilocks zone
适居带
light years
光年
dwarf star
点击收听单词发音收听单词发音
1 tally Gg1yq
n.计数器，记分，一致，测量；vt.计算，记录，使一致；vi.计算，记分，一致
参考例句：
Don't forget to keep a careful tally of what you spend.别忘了仔细记下你的开支账目。
The facts mentioned in the report tally to every detail.报告中所提到的事实都丝毫不差。
2 temperate tIhzd
adj.温和的，温带的，自我克制的，不过度的
参考例句：
Asia extends across the frigid,temperate and tropical zones.亚洲地跨寒、温、热三带。
Great Britain has a temperate climate.英国气候温和。
3 astronomers 569155f16962e086bd7de77deceefcbd
n.天文学者，天文学家( astronomer的名词复数 )
参考例句：
Astronomers can accurately foretell the date,time,and length of future eclipses. 天文学家能精确地预告未来日食月食的日期、时刻和时长。
来自《简明英汉词典》
Astronomers used to ask why only Saturn has rings. 天文学家们过去一直感到奇怪，为什么只有土星有光环。
来自《简明英汉词典》
4 dwarf EkjzH
n.矮子，侏儒，矮小的动植物；vt.使…矮小
参考例句：
The dwarf's long arms were not proportional to his height.那侏儒的长臂与他的身高不成比例。
The dwarf shrugged his shoulders and shook his head. 矮子耸耸肩膀，摇摇头。