Climate change connected with the reduction of wetlands at the source of the country's two longest rivers， the Yangtze and the Yellow， has reduced the volume of water flowing into them， scientists said.
Scientists studied changes over past 40 years to the wetlands on the cold Qinghai­Tibet Plateau in west China where the two rivers have their sources.
They found the wetlands on the plateau have shrunk (減少) more than 10 percent over the past four years. The wetlands at the source of the Yangtze have suffered the most， decreasing by 29 percent.
About 17.5 percent of the small lakes at the source of the Yangtze have dried up， the scientists said.
“The wetland plays a key role in holding water and changing the water volume of the rivers，” Wang Xugen， a researcher， said.
“The reduction of the wetland on the plateau is closely connected with global warming，” Wang said， adding that even though rainfall has increased in the area， the reduction of the wetland has reduced the flow of the Yangtze and the Yellow.
Records by the weather station at the head of the Yangtze showed yearly rainfall at its source increased from 260 mm during 1991—2000 to 323 mm in the period 2001—2006.
“But the increased rainfall didn't lead to more water's flowing into the rivers because the evaporation (蒸發(fā)) was so fast as a result of global warming，” Li Shijie， a researcher， said.
Another study showed global warming had caused glaciers to get smaller， frozen earth to melt， grasslands to turn yellow and rivers to dry up.
The Qinghai­Tibet Plateau used to have 36 000 glaciers covering an area of 50 000 sq km. In the past 100 years， their area has been reduced by 30 percent.
60.According to the passage， the true statement of the following is that　　　　.
A.the wetlands at the source of the Yellow have decreased by 29 percent
B.there's no more water in about 17.5 percent of the small lakes at the source of the Yangtze
C.the reduction of the wetland on the plateau has nothing to do with global warming
D.yearly rainfall has increased from 260 mm to 323 mm in the past 15 years
61.Which of the following is NOT the result of global warming？
A.Frozen earth melts.  B.Evaporation becomes faster.
C.Sea level rises.      D.Plants grow better in greenhouses.
62.The area that the glaciers of the Qinghai­Tibet Plateau cover is now about　　　　sq km.
A.35 000  B.12 000  C.15 000  D.17 000
63.In the passage，　　　　plays a most important part in holding water and changing the volume of the rivers.
A.yearly rainfall  B.the evaporation  C.the wetland  D.climate change

小題1:B
小題2:D
小題3:A
小題4:C
         
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：高中英語 來源：不詳 題型：閱讀理解

The ocean contains many strange and surprising creatures. One such creature is the puffer fish. This very strange fish is probably the most poisonous creature in the ocean. The poison that this fish produces is 275 times more poisonous than the chemical which is usually used to kill rats.
The puffer fish gets its name from the way the fish protects itself from enemies. Whenever it is attacked, the fish blows up its body to three times bigger than its normal size!
Another strange thing about this fish is the fact that it can swim like other fish. Because it does not have bones like other fish, the puffer fish can only move slowly through the water as it is carried by waves.
The puffer fish also has funny teeth. These teeth stick out of the fish’s mouth and are used by the fish to open the shells of the creatures that live on the ocean floor.
This strange, ugly, and very poisonous fish is actually a very expensive kind of food in Japan. The Japanese call this fish “fugu”, and people have been known to pay $150 per person to eat a fugu meal (usually eight servings)!
Very brave people want to eat the most poisonous part of the fugu fish on purpose. They think that this part of the fish tastes the best! Strict laws have been passed to control restaurants which serve fugu; however, quite a few people have still died from eating fugu.Almost 200 people have died over the past 25 years.
When people eat fugu poison, they do not die on the spot. First, they feel a strange tickle on their lips and in their mouth. Then they can not feel anything with their fingers. Finally, they cannot move or speak. Death follows when they can no longer breathe. The poison may take only a few minutes or up to six hours to kill a person. There is no known cure for fugu poisoning.
小題1:According to the passage, the puffer fish       .
A．is probably the most poisonous creature in the world
B．is generally considered to be the strangest fish in the ocean
C．is slightly more poisonous than the chemical used to kill rats
D．is without doubt a deadly creature if it is not eaten properly
小題2: Why do people think that the puffer fish is strange when it is attacked by an enemy?
A．It becomes bigger. B．It has funny teeth.
C．It gives off poison. D．It can swim swiftly.
小題3:The underlined expression “on the spot” in the last paragraph is closest in meaning to      .
A．now and then B．once in a while
C．then and thereD．sooner or later
小題4:Who is allowed to serve fugu according to the passage?
A．The Japanese government. B．Licensed restaurants.
C．Strict lawyers in Japan . D．Very brave people
小題5:Which is NOT a symptom of fugu poisoning?
A．Having difficulty breathing. B．Having no sense of touch.
C．Having no sense of taste.D．Having trouble speaking.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

Unless we spend money to spot and prevent asteroids (小行星) now, one might crash into Earth and destroy life as we know it, say some scientists.
Asteroids are bigger versions of the meteoroids (流星) that race across the night sky. Most orbit the sun far from Earth and don’t threaten us. But there are also thousands whose orbits put them on a collision course with Earth.
Buy $50 million worth of new telescopes right now. Then spend $100 million a year for the next 25 years to locate most of the space rocks. By the time we spot a fatal one, the scientists say, we’ll have a way to change its course.
Some scientists favor pushing asteroids off course with nuclear weapons. But the cost wouldn’t be cheap.
Is it worth it? Two things experts consider when judging any risk are: 1) How likely the event is; and 2) How bad the consequences if the event occurs. Experts think an asteroid big enough to destroy lots of life might strike Earth once every 500,000 years. Sounds pretty rare-but if one did fall, it would be the end of the world. If we don’t take care of these big asteroids, they’ll take care of us,” says one scientist. “It’s that simple.”
The cure, though, might be worse than the disease. Do we really want fleets of nuclear weapons sitting around on Earth? “ The world has less to fear from doomsday (毀滅性的) rocks than from a great nuclear fleet set against them,” said a New York Times article.
66. What does the passage say about asteroids and meteoroids?
A.They are heavenly bodies different in composition.
B. They are heavenly bodies similar in nature.
C. There are more asteroids than meteoroids.
D. Asteroids are more mysterious than meteoroids.
67. What do scientists say about the collision of an asteroid with Earth?
A. It is very unlikely but the danger exists.
B. Such a collision might occur once every 25 years.
C. Collisions of smaller asteroids with Earth occur more often than expected.
D. It’s still too early to say whether such a collision might occur.
68. What do people think of the suggestion of using nuclear weapons to alter the course of asteroids?
A. It sounds practical but it may not solve the problem.
B. It may create more problems than it might solve.
C. It is a waste of money because a collision of asteroids with Earth is very unlikely.
D. Further research should be done before it is proved applicable.
69. We can conclude from the passage that ________
A. while pushing asteroids off course nuclear weapons would destroy the world.
B. asteroids racing across the night sky are likely to hit Earth in the near future.
C. the worry about asteroids can be left to future generations since it is unlikely to happen in our lifetime
D. workable solutions still have to be found to prevent a collision of asteroids with Earth.
70. Which of the following best describes the author’s tone in this passage?
A. Optimistic          B. Critical         C. Objective         D. Arbitrary

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解


The Jonas Brothers are an American pop-rock band from Wyckoff，New Jersey．Born to musical parents．the Jonas Brothers grew up in a home where music was a large part of everyday life．Father Kevin Jonas，Sr．is the co-founder of Christ For The Nations Music，as well as a pastor(牧師)at a local church，in Wyckoff, NJ．Growing up in such a musically accomplished family gave the boys a love for music，as well as a bit of inside knowledge about the workings of the music industry．
19-year-old Kevin Jonas is the oldest of the three boys．At 13，Kevin taught himself to play me guitar, simply by studying a “Teach Yourself Guitar” book that he had found lying around his parents’home in New Jersey．Kevin spent about three days learning all of the major guitar chords(和弦)while he was home from school，due to illness．Even before their band was formed，Kevin had already appeared in several television commercials for Disney, Lego，and Burger King．
Joseph Jonas is 17 years old．While Joe originally wanted to be a comedian，he always had a love for music as well．Joe’s appearance in Baz Luhrmann’s Broadway production of“La Boheme” was his first performance as a singer．Joe said that watching his brother, Kevin，perform on Broadway was what motivated him to want to give musical theatre a try．Since discovering his talent for musical performances，Joe has never turned back．
Nick Jonas is 14 years old, and the youngest of the three Jonas Brothers．Despite his young age, he is sometimes referred to as the motivation behind the band. At 6 Nick was singing while getting his hair cut at a local barber shop, when a lady heard him, and gave him a card, suggesting that he should meet with a professional manager. From then on Nick was performing in front of audiences, big and small. Nick landed roles in Broadway shows like “Annie Get Your Gun”, “Beauty and the Beast”, and “Les Miserables”.
64．Kevin Jonas learned to play the guitar         
A．by himself                 B．from his father
C．a(chǎn)t a music school           D．under his teacher’s guidance
65．Joseph Jonas decided to try singing on stage because      
A．he had longed to do so since his childhood
B．his parents wanted the brothers to sing together
C．he was invited to act in a show at a local theatre
D．Kevin’s performance on Broad way inspired him
66．From the passage，we can infer that     ．
A．the barber decided to give Nick Jonas a free hair cut
B．the owner of the shop considered Nick Jonas a VIP
C．Nick Jonas was advised to discuss his future career
D．Nick Jonas’handsome appearance attracted a woman
67．The passage is intended to      ．
A．offer readers information about the Jonas Brothers
B．prove strong family ties combine the boys together
C．explain why the three brothers began singing together
D．show how the boys are different from one another

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

The Red Panda isn’t much bigger than an average size house cat. At first you may think it’s a bear because of its name. They’re actually a member of the raccoon(浣熊) family which you can tell if you look at their appearance. The Red Panda has a long bushy tail that is useful in two ways. It helps them stay balanced when they are high up in the trees and it keeps them warm in cold weather. Their fur is thick and reddish brown, which may be why they’re known as the fire fox.
The Red Panda can be found in forested mountains. They’re originally from the forested mountain in the Himalayas in India, Nepal and Southern China. Bamboo is the most important part of their diet. They only eat the young leaves and shoots (嫩芽) of a bamboo plant. Red Pandas have a very low metabolic(新陳代謝的) rate in order to deal with their low energy diet and cool environmental temperatures.
They’re very shy and gentle and don’t hang around the wild too much during the day. If they feel endangered, they’ll stand on their back legs and make a hissing(嘶嘶) sound. Red Pandas are good climbers and spend most of their time living mainly in trees. Their claws are very strong and help them hold onto the branches. They sleep in an unusual way by curling up tightly and wrapping their tails around their heads while sitting on a branch. Sometimes they’ll sleep with their head beneath their chest and behind their back feet. This is the same position as an American raccoon sleeps.
小題1:You can tell that the Red Panda is a member of the raccoon family from ____.
A．its nameB．its appearanceC．its dietD．its living place
小題2:Which of the following is TRUE according to the passage?
A．The Red Panda can only be found in India, Nepal and Southern China.
B．The Red Panda’s tail can help it stay balanced when it is high up in the trees.
C．The Red Panda eats the whole of the bamboo.
D．The Red Panda has high metabolic rate when the temperature is low.
小題3:What will Red Pandas do when they are in trouble?
A．They will hang around the wild during the day.
B．They will climb into the trees.
C．They will wrap their tails around their heads.
D．They will stand on their back legs and make a hissing sound.
小題4:The Red Panda holds onto the branches with its ____.
A．tailB．furC．back legsD．claws

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解


The professor stood before his class of 30 senior biology students, about to pass out the final exam. “I have been honored to be your instructor this term, and I know how hard you have all worked to prepare for this test. I also know most of you are off to medical school or graduate school next fall,” he said to them.
“I can well understand how much pressure you are under to keep your grades up, and because I know you are able to understand this material, I am prepared to offer an automatic(自動(dòng)的) “B” to anyone who would prefer not to take the final.”
In relief a number of students jumped up to thank the professor and left the class. The professor looked at the students who remained, and offered again, “Any other takers? This is your last chance.” One more student decided to go.
There were seven students left. The professor closed the door. Then he handed out the final exam. There were only two sentences typed on the paper: “Congratulations, you have just received an “A” in this class. Keep believing in yourself.”
I never had a professor who gave a test like that. It may seem like the easy way out of grading (評(píng)分) a lot of exams, but it’s a test that any teacher in any subject could and should give. Students who don’t have confidence in what they’ve learned are “B” students at best.
The same is true for students of real life. The “A” students are those who believe in what they’re doing because they’ve learned from both successes and failures. They have learned life’s lessons, whether from formal education or the school of hard knocks, and become better people.
Take your cue(榜樣) from Sir Edmund Hillary, the first person to reach the top of Mount Qomolangma: “It’s not the mountain we conquer (征服), but ourselves.” Don’t let the biggest limit be yourself.
53. The professor offered an automatic “B” to those who would prefer not to take the final exam because _________.
A. he liked the students who wanted to get a “B”
B. he believed they were able to pass the exam
C. he thought any teacher should give them a “B”
D. he thought it was the easy way of grading exams
54. According to the text, which of the following statements is TRUE?
A. 22 students got a “B” in the final test without doing the paper.
B. Most of the students would go to medical school shortly after the exam.
C. There were actually no problems on the test papers for the students to work out.
D. The way the professor tested his students would not be suitable for other subjects.
55. According to the writer, the test given by the professor was ________.
A. funny        B. meaningful       C. difficult            D. harmful
56. The point of the story is to advise readers _________.
A. to pay attention to what they can do
B. not to miss any final exam at school
C. not to let themselves limit their growth
D. to surround themselves with confident people

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解


Lateral thinking（迂回思維），first described by Edward de Bono in 1967，is just a few years older than Edward’s son．You might imagine that Caspar was raised to be an adventurous thinker，but the de Bono was so famous，Casspar’s parents worried that any time he would say something bright at school，his teachers might ask，“Where do you get that idea from？”
“We had to be careful and not overdo it．”Edward admits．Now Caspar is at Oxford-which once looked unlikely because he is also slightly dyslexic（誦讀困難）．In fact，when he was applying to Oxford，none of his school teachers thought he had a chance．“So then we did several thinking sessions,”his father says，“using my techniques and，when he went up for the exam，he did extremely well．”Soon after，Edward de Bone decided to write his latest book，“Teach Your Child How to Think”，in which he transforms the thinking skills he developed for brain-storming businessmen into informal exercises for parents and children to share．
Thinking is traditionally regarded as something executed in a logical sequence，and everybody knows that children aren’t very logical．So isn’t it an uphill battle，trying to teach them to think？“You know，”Edward de Bono says，“if you examine people’s thinking，it is quite unusual to find faults of logic．But the faults of perception are huge！Often we think ineffectively because we take too limited a view．”
“Teach Your Child How to Think”offers lessons in perception improvement，of clearly seeing the implications of something you are saying and of exploring the alternatives．
60．What is TRUE about Caspar？
A．He is Edward’s son．   B．He is an adventurous thinker．
C．He first described lateral thinking．      D．He is often scolded by his teacher．
61．It can be inferred from paragraph 2 that Edward        .
A．was likely to improve children’s logic with his book
B．gave a description of lateral thinking several years after his son was born
C．was prompted to study lateral thinking because his son was slightly dyslexic
D．once taught businessmen how to think before he wrote for parents and chikdren
62．According to Paragraph 3，which of the following statements expresses Edward de Bone’s view？
A．Everybody knows that children aren’t very logical．
B．It is an uphill battle trying to teach children to think．
C．We often think ineffectively because we take too limited a view．
D．Thinking is traditionally regarded as something executed in a logical sequence．
63．Lateral thinking refers to the following EXCEPT        ．
A．improving one’s logic in thinking
B．improving one’s perception in thinking
C．seeing the implications of what you are saying
D．exploring the alternatives for what you are saying

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

Education is required and free for every child in the United States. Most children start school by the age of six. They attend eight years of elementary school and four years of high school (or secondary school ).The money for free public schools comes from taxes, and each state is responsible for its own educational system .State legislatures (立法機(jī)關(guān)) set the educational requirements but leave the management of the schools in the hands of the local communities .Most states require their children to go to school until a certain age. This age varies from 16 to 18 years according to the laws of the individual state. The Federal government contributes funds to the states for additional schools and schools services.
After graduation from high school, a student can start his higher education in two –year college, a four-year college, a university or a specialized professional school----either public or private. Most colleges admit students on the basis of their high-school records. The cost of a college education is expensive in private universities, but it is much less in those supported by states and cities. Many students receive scholarships from the schools, the government, or private foundations and organizations. More than 50 percent of the college students work to help pay their college expenses.
Only 2 percent of the population of the country cannot read and write.
56、Where does the money for public schools come from ?
A. From the Federal government.       B. From the state legislatures.
C. From taxes.                      D. From the parents of the school children.
57、What is the educational system in the United States based on ?
A.  The Federal government                   B. Individual school
C.  Individual state                           D. Local communities
58、What percentage of the population is illiterate (文盲？
A. 50                B. 2               C. 4                    D. 6
59、How are college expenses of most students paid ?
A.      They won earnings from part-time work .
B.      Scholarship from the schools, the government or private foundations.
C.      Taxes .
D.  Both A and B.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解



We’ve used the wind as an energy source for a long time．
The Babylonians and Chinese were using wind power to
pump water for irrigating crops 4,000 years ago, and sailing
boats were around long before that．Wind power was used in the
Middle Ages, in Europe, to grind（磨碎） corn, which is where
the term “windmill” comes from．
We can use the energy in the wind by building a tall tower, with a large propellor（螺旋槳） on the top．The wind blows the propellor round, which turns a generator to produce electricity．We tend to build many of these towers together, to make a “wind farm” and produce more electricity．The more towers, the more wind, and the larger the propellors, the more electricity we can make．It's only worth building wind farms in places that have strong, steady winds, although boats and caravans（大篷車）increasingly have small wind generators to help keep their batteries charged．
The best places for wind farms are in coastal areas, at the tops of rounded hills, open plains and gaps in mountains — places where the wind is strong and reliable．Some are offshore．To be worthwhile, you need an average wind speed of around 25 km/h．Most wind farms in the UK are in Cornwall or Wales．Isolated places such as farms may have their own wind generators．In California, several “wind farms” supply electricity to homes around Los Angeles．
The propellors are large, to obtain energy from the largest possible volume of air．The blades can be angled to cope with varying wind speeds．Some designs use vertical turbines （垂直渦輪機(jī)）, which don’t need to be turned to face the wind．The towers are tall, to get the propellors as high as possible, up to where the wind is stronger．This means that the land beneath can still be used for farming．
1．The first paragraph aims to introduce to us _______．
A．the function of wind power           B．the source of wind power
C．the nations using wind power        D．the history of using wind power
2．The best places for building the wind farm are places where _______．
A．boats and caravans can often be seen     B．isolated farms don’t have enough electricity
C．there are less human activities         D．the wind is strong and reliable
3．We can infer from the passage that _______．
A．wind farms will not take up too much farming land
B．wind farms need no fuel because wind is free
C．the blades can be angled to turn to face the wind wherever it comes from
D．the higher and larger the towers are, the stronger the wind is
4．What can be a suitable title for the passage?
A．Where to build a wind farm．     B．ABC of the using of wind energy．
C．How to make best use of wind．    D．Wind energy is the best energy．

查看答案和解析>>

同步練習(xí)冊(cè)答案