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The rainforests are home to one-third of the Earth's plant and animal species.
A．Y
B．N
C．NG
答案
更多“The rainforests are home to one-third of the Earth's plant and animal species.A．YB．NC．NG”相关的问题
第1题
What is NOT the result of consuming fossil fuels according to the last paragraph？
A. Rainforests will be destroyed．
B. Arctic ice will be melted．
C. The earth’s temperature will be raised．
D. The sea level will go up．
第2题
What does the last sentence of the passage most probably mean？
A．The rainforest in the Central African Republic will be preserved forever.
B．The well-designed exhibit will be preserved as an artifact.
C．The exhibit reflects the hope that natural rainforests will be well preserved.
D．The exhibit of the rainforest in the museum is the sole one in the world.
第3题
听力原文： Plants are adapted to the climate they live in for the most part. Trees in rainforests have broad leaves, shaped to encourage the heavy rain to run off the leaves. The large leaves encourage transpiration so the plants don't overheat. In very dry climates plants may develop an ability to store water, such as the cactus, which also has its leaves reduced into tiny spines which reduce transpiration to almost nothing so its precious water is conserved. At the first sign of drought, plants close their leaf pores to prevent wilting and slowing down growth so that they need less water. Coniferous plants also have small spiky leaves so that they don't lose too much water during the frozen winters. Grasses roll their leaves into tubes to protect their leaf pores from the drying effect of the wind. Tropical air plants have moisture sensitive plugs attached to their leaf pores which are pulled down over the pores, sealing them to hold in moisture, by the contraction of the stalks in dry weather.
Plants are affected by strong winds which make them grow thicker and more stunted stems to strengthen and prevent themselves from being blown over. A special sort of strong wood called "reaction wood" grows on the leeward side of tile wind. Plants are also susceptible to waterlogging and freezing and many plants have developed complex mechanisms and adaptations to protect themselves from disasters.
Trees in rainforests have broad leaves. The advantage is______.
A．to accept more sun light
B．to encourage the heavy rain to run off the leaves
C．to shade their roots
D．to hide their trunk
第4题
【C1】
A．critically
B．barely
C．slightly
D．mainly
第5题
Trees catch and【C6】______rainwater. Their leaves break the impact【C7】______the rains, robbing them of【C8】______destructive power. The roots of trees allow the water to go into the soil,【C9】______gradually releases it to flow down rivers and refill ground-water reserves. Where there are no【C10】______, the rains run in sheets of water off the land,【C11】______the soil with there Land【C12】______with trees and other plants【C13】______20 times more rainwater than【C14】______earth. As they grow, trees absorb carbon dioxide, the main【C15】______of the "greenhouse effect", which【C16】______irreversibly to change the world's climate. Together, the world's trees, plants and soils contain three times as much carbon as【C17】______is in the atmosphere.
The world's forests【C18】______the vast majority of its animal and plant species. The tropical rainforests【C19】______have well over half of them,【C20】______they cover only about 6% of the Earth's land surface.
【C1】
A．for
B．from
C．by
D．with
第6题
Rhett Butler named the site for Nosy Mangabe, an island off Madagascar. His purpose was to inform. the public about tropical rainforests. But the subject widened. A former businessman, he became a respected writer of science and environmental stories.
The popularity of Mongabay.com attracted advertisers. Small ads on the site pay for its operations. Mongabay has grown and led to other sites. For example, there is a site for children, kids.mongabay.com. Another one, WildMadagascar.org, is all about the island nation that Rhett Butler calls his favorite place.
He travels the world on several major trips each year. His working tools are a laptop computer, cameras and sometimes diving equipment.
He often calls on experts for information for stories. For example, he interviewed Alison Jolly, a top expert on ring-tailed lemurs. And last week he wrote about another animal, the rare snow leopard. He interviewed Rodney Jackson, a biologist who established the Snow Leopard Conservancy.
Stories like these have made Mongabay a favorite place on the Internet for researchers, students and teachers. In April, Time.com named it one of the fifteen top climate and environment web sites.
Rhett Butler says he is concerned about how the current economic crisis in the world might affect environmental conservation efforts. For example, he says the falling price of oil could reduce interest in developing solar power. But he also points to a recent United Nations report on "green jobs". The report said efforts to fight climate change might lead to millions of jobs in biofuels by two thousand thirty.
What did Rhett Butler do in 1999？
A．He published his book.
B．He stopped his research.
C．He set up a wet site.
D．He went to the rainforests.
第7题
Burning wood satisfied most energy needs until the steam-driven industrial revolution, when energy-dense coal became the fuel of choice. Coal is still used, mostly in power stations, to cover one quarter of our energy needs, but its use has been declining since we started pumping up oil. Coal is the least efficient, unhealthiest and most environmentally damaging fossil fuel, but could make a comeback, as supplies are still plentiful; its reserves are five times larger than oil's.
Today petroleum, a mineral oil obtained from below the surface of the Earth and used to produce petrol, diesel oil and various other chemical substances, provides around 40% of the world's energy needs, mostly fuelling automobiles. The US consumes a quarter of all oil, and generates a similar proportion of greenhouse gas emissions.
The majority of oil comes from the Middle East, which has half of known reserves. But other significant sources include Russia, North America, Norway, Venezuela and the North Sea. Alaska's Arctic National Wildlife Refuge could be a major new US source, to reduce reliance on foreign imports.
Most experts predict we will exhaust easily accessible reserves within 50 years, though opinions and estimates vary. We could fast reach an energy crisis in the next few decades, when demand exceeds supply. As conventional reserves become more difficult to access, others such as tar sands may be used instead. Petrol could also be obtained from coal.
Since we started using fossil fuels ,we have released 400 billion tones of carbon, and burning the entire reserves could eventually raise world temperatures by 13℃. Among other horrors, this would result in the destruction of all rainforests and tile inching of all Arctic ice.
"… we will need to cure our addiction to oil." Why does the author say so？
A．Most of the energy on Earth comes from the Sun.
B．Oil supply is increasing all the time.
C．Demand for oil is increasing all tile time.
D．Oil supply is decreasing.
第8题
The home of El Nino is Peru. El Nino, "the Christ Child", was first named by Peruvian fishermen one Christmas when they noticed unusual warm currents affecting the Pacific coast of South America. Up and down the county, from desert to highlands, El Nino weather phenomena have brought destructive floods, costing $ 200 million in immediate and long-term damage, and undoing the work of many development projects.
"The destruction is near total," Dominic Brain, a worker for Christian Aid reported. "Few of the houses could withstand the floodwater. Today I visited Acomayo, a shantytown(贫民区) where 17,500 people once live. Now only ten percent of the houses are still standing. The bulk of the population has lost all their possessions."
The town of Ica seldom sees rain. Houses for the poor are built of adobe—sun-baked mud—standing side by side in long terraces. When the River Ica burst its banks in late January, 15,000 houses were swiftly flooded. Up to 5,000 houses were destroyed—a sign not only of the force of the river, which loosened huge rocks and swept them falling down from the Andean mountains, but of the vulnerability of the homes which hardly ever face rain. "They melted like chocolate," exclaimed an eye-witness. "The extent of the damage was terrible!"
Almost immediately health became a problem. Without proper plumbing(排水), waste matter rose to the surface of the floodwaters. People received cuts walking through the floodwater and mud. Cholera—epidemic in Peru in the early nineties—returned, with 90 reported eases in Ica province alone. The entire city seems to have drowned—first in floodwaters 1.5 meters high, and then in mud. Sadly, three people lost their lives, sucked into the floodwaters, but it was a miracle that there were not more casualties(伤亡者).
El Nino is a warm ocean current______.
A．which centers on America and Africa
B．which was named by an American
C．which kills many people every time
D．which has side-effects all over the world
第9题
Thirst for Oil
Worldwide every day, we devour the energy equivalent of about 200 million barrels of oil. Most of the energy on Earth comes from the Sun. In fact enough energy from the Sun hits the planet's surface each minute to cover our needs for an entire year, we just need to find an efficient way to use it. So far the energy in oil has been cheaper and easier to get at. But as supplies dwindle, this will change, and we will need to cure our addiction to oil.
Burning wood satisfied most energy needs until the steam-driven industrial revolution, when energy-dense coal became the fuel of choice. Coal is still used, mostly in power stations, to cover one quarter of our energy needs, but its use has been declining since we started pumping up oil. Coal is the least efficient, unhealthiest and most environmentally damaging fossil fuel, but could make a comeback, as supplies are still plentiful: its reserves are five times larger than oil's.
Today petroleum, a mineral oil obtained from below the surface of the Earth and used to produce petrol, diesel oil and various other chemical substances, provides around 40% of the world's energy needs, mostly fuelling automobiles. The US consumes a quarter of all oil, and generates a similar proportion of greenhouse gas emissions.
The majority of oil comes from the Middle East, which has half of known reserves. But other significant sources include Russia, North America, Norway, Venezuela and the North Sea. Alaska's Arctic National Wildlife Refuge could be a major new US source, to reduce reliance on foreign imports.
Most experts predict we will exhaust easily accessible reserves within 50 years, though opinions and estimates vary. We could fast reach an energy crisis in the next few decades, when demand exceeds supply. As conventional reserves become more difficult to access, others such as oil shales and tar sands may be used instead. Petrol could also be obtained from coal.
Since we started using fossil fuels, we have released 400 billion tonnes of carbon, and burning the entire reserves could eventually raise world temperatures by 13℃. Among other horrors, this would result in the destruction of all rainforests and the melting of all Arctic ice.
"... we will need to cure our addiction to oil." Why does the author say so？
A．Most of the energy on Earth comes from the Sun.
B．Oil supply is increasing all the time.
C．Demand for oil is increasing all the time.
D．Oil supply is decreasing.
第10题
根据材料，回答题。
Thirst for Oil
Worldwide every day， we devour the energy equivalent of about 200 million barrels of oil.Most of the energy on Earth comes from the Sun. In fact enough energy from the Sun hits the planet"s surface each minute to cover our needs for an entire year， we just need to find an efficient way，to use it. So far the energy in oil has been cheaper and easier to get at. But as supplies dwindle， this will change， and we will need to cure our addiction to oil.
Burning wood satisfied most energy needs until the steam-driven industrial revolution， when energy-dense coal became the fuel of choice. Coal is still used， mostly in power stations， to cover one quarter of our energy needs， but its use has been declining since we started pumping up oil. Coal is the least efficient， unhealthiest and most environmentally damaging fossil fuel， but could make a comeback， as supplies are still plentiful: its reserves are five times larger than oil"s.
Today petroleum， a mineral oil obtained from below the surface of the Earth and used to pro: duce petrol， diesel oil and various other chemical substances， provides around 40% of the world"s energy needs， mostly fuelling automobiles. The US consumes a quarter of all oil， and generates a similar proportion of greenhouse gas emissions.
The majority of oil comes from the Middle East， which has half of known reserves. But other significant sources include Russia， North-America， Norway， Venezuela and the North Sea. Alaska"s Arctic National Wildlife Refuge could be a major new US source， to reduce reliance on foreign imports.
Most experts predict we will exhaust easily accessible reserves within 50 years， though opinions and estimates vary. We could fast reach an energy crisis in the next few decades， when demand exceeds supply. As conventional reserves become more difficult to access， others such as oil shales and tar sands may be used instead. Petrol could also be obtained from coal.
Since we started using fossil fuels， we have released 400 billion tonnes of carbon， and burning the entire reserves could eventually raise world temperatures by 13℃. Among other horrors，this would result in the destruction of all rainforests and the melting of all Arctic ice.
"... we will need to cure our addiction to oil. " Why does the author say so？ 查看材料
A.Most of the energy on Earth comes from the Sun.
B.Oil supply is increasing all the time.
C.Demand for oil is increasing all the time.
D.Oil，supply is decreasing.
