Malaria, the world's most widespread parasitic(寄生虫引起的) disease, kills as many as three million people every year—almost all of whom are under five, very poor, and African.In most years, more than five hundred million cases of illness result from the disease, although exact numbers are difficult to assess because many people don't (or can't) seek care.It is not unusual for a family earning less than two hundred dollars a year to spend a quarter of its income on malaria treatment, and what they often get no longer works.In countries like Tanzania, Mozambique, and the Gambia, no family, village, hospital, or workplace can remain unaffected for long.
Malaria starts suddenly, with violent chills, which are soon followed by an intense fever and, often, headaches.As the parasites multiply, they take over the entire body.Malaria parasites live by eating the red blood cells they infect (感染).They can also attach themselves to blood vessels in the brain.If it doesn't kill you, malaria can happen again and again for years.The disease passed on to humans by female mosquitoes infected with one of four species of parasite.Together, the mosquito and the parasite are the most deadly couple in the history of the earth—and one of the most successful.Malaria has five thousand genes, and its ability to change rapidly to defend itself and resist new drugs has made it nearly impossible to control.Studies show that mosquitoes are passing on the virus more frequently, and there are more outbreaks in cities with large populations.Some of the disease's spread is due to global warming.
For decades, the first-choice treatment for malaria parasites in Africa has been chloroquine, a chemical which is very cheap and easy to make.Unfortunately, in most parts of the world, malaria parasites have become resistant to it.Successful alternatives that help prevent resistance are already available, but they have been in short supply and are very expensive.If these drugs should fail, nobody knows what would come next.
1.According to paragraph 1, many people don't seek care because___.
A.they are too poor
B.it is unusual to seek care
C.they can remain unaffected for long
D.there are too many people suffering from the disease
2.People suffering from malaria___.
A.have to kill female mosquitoes B.have ability to defend parasites
C.have their red blood cells infected D.have sudden fever, followed by chills
3.Which of the following may be the reason for the wide spread of the disease?
A.Its resistance to global warming.
B.Its ability to pass on the virus frequently.
C.Its outbreaks in cities with large populations.
D.Its ability to defend itself and resist new drugs.
4.It can be inferred from the passage that___.
A.no drugs have been found to treat the disease
B.the alternative treatment is not easily available to most people
C.malaria has developed its ability to resist parasites
D.nobody knows what will be the drug to treat the disease
5.Which of the following questions has NOT been discussed in the passage?
A.How can we know one is suffering from malaria?
B.How many people are killed by malaria each year?
C.Why are there so many people suffering from malaria?
D.What has been done to keep people unaffected for long?
高二英语阅读理解中等难度题
Malaria, the world's most widespread parasitic(寄生虫引起的) disease, kills as many as three million people every year—almost all of whom are under five, very poor, and African.In most years, more than five hundred million cases of illness result from the disease, although exact numbers are difficult to assess because many people don't (or can't) seek care.It is not unusual for a family earning less than two hundred dollars a year to spend a quarter of its income on malaria treatment, and what they often get no longer works.In countries like Tanzania, Mozambique, and the Gambia, no family, village, hospital, or workplace can remain unaffected for long.
Malaria starts suddenly, with violent chills, which are soon followed by an intense fever and, often, headaches.As the parasites multiply, they take over the entire body.Malaria parasites live by eating the red blood cells they infect (感染).They can also attach themselves to blood vessels in the brain.If it doesn't kill you, malaria can happen again and again for years.The disease passed on to humans by female mosquitoes infected with one of four species of parasite.Together, the mosquito and the parasite are the most deadly couple in the history of the earth—and one of the most successful.Malaria has five thousand genes, and its ability to change rapidly to defend itself and resist new drugs has made it nearly impossible to control.Studies show that mosquitoes are passing on the virus more frequently, and there are more outbreaks in cities with large populations.Some of the disease's spread is due to global warming.
For decades, the first-choice treatment for malaria parasites in Africa has been chloroquine, a chemical which is very cheap and easy to make.Unfortunately, in most parts of the world, malaria parasites have become resistant to it.Successful alternatives that help prevent resistance are already available, but they have been in short supply and are very expensive.If these drugs should fail, nobody knows what would come next.
1.According to paragraph 1, many people don't seek care because___.
A.they are too poor
B.it is unusual to seek care
C.they can remain unaffected for long
D.there are too many people suffering from the disease
2.People suffering from malaria___.
A.have to kill female mosquitoes B.have ability to defend parasites
C.have their red blood cells infected D.have sudden fever, followed by chills
3.Which of the following may be the reason for the wide spread of the disease?
A.Its resistance to global warming.
B.Its ability to pass on the virus frequently.
C.Its outbreaks in cities with large populations.
D.Its ability to defend itself and resist new drugs.
4.It can be inferred from the passage that___.
A.no drugs have been found to treat the disease
B.the alternative treatment is not easily available to most people
C.malaria has developed its ability to resist parasites
D.nobody knows what will be the drug to treat the disease
5.Which of the following questions has NOT been discussed in the passage?
A.How can we know one is suffering from malaria?
B.How many people are killed by malaria each year?
C.Why are there so many people suffering from malaria?
D.What has been done to keep people unaffected for long?
高二英语阅读理解中等难度题查看答案及解析
Malaria, the world’s most widespread parasitic (寄生虫引起的)disease, kills as many as three million people every year—almost all of whom are under five, very poor, and African. In most years, more than five hundred million cases of illness result from the disease, although exact numbers are difficult to assess because many people don't (or can’t) seek care. It is not unusual for a family earning less than two hundred dollars a year to spend a quarter of its income on malaria treatment, and what they often get no longer works. In countries like Tanzania, Mozambique, and the Gambia, no family, village, hospital, or workplace can remain unaffected for long.
Malaria starts suddenly, with violent chills, which are soon followed by an intense fever and, often, headaches. As the parasites multiply, they take over the entire body. Malaria parasites live by eating the red blood cells they infect. They can also attach themselves to blood vessels in the brain. If it doesn’t kill you, malaria can happen again and again for years. The disease is passed on to humans by female mosquitoes infected with one of four species of a parasite. Together, the mosquito and the parasite are the most deadly couple in the history of the earth and one of the most successful. Malaria has five thousand genes, and its ability to change rapidly to defend itself and resist new drugs has made it nearly impossible to control. Studies show that mosquitoes are passing on the virus more frequently, and there are more outbreaks in cities with large populations. Some of the disease's spread is due to global warming.
For decades, the first-choice treatment for malaria parasites in Africa has been chloroquine, a chemical which is very cheap and easy to make. Unfortunately, in most parts of the world, malaria parasites have become resistant to it. Successful alternatives that help prevent resistance are already available, but they have been in short supply and are very expensive. If these drugs should fail, nobody knows what would come next.
1.According to paragraph 1, many people don’t seek care because ________.
A. they are too poor
B. it is unusual to seek care
C. they can remain unaffected for long
D. there are too many people suffering from the disease
2.People suffering from malaria ________.
A. have to kill female mosquitoes B. have ability to defend parasites
C. have their red blood cells infected D. have sudden fever, followed by chills
3.Which of the following may be the reason for the wide spread of the disease?
A. Its resistance to global warming.
B. Its ability to pass on the virus frequently.
C. Its outbreaks in cities with large populations.
D. Its ability to defend itself and resist new drugs.
4. It can be inferred from the passage that ________.
A. no drugs have been found to treat the disease
B. the alternative treatment is not easily available to most people
C. malaria has developed its ability to resist parasites
D. nobody knows what will be the drug to treat the disease
高二英语阅读理解中等难度题查看答案及解析
The common cold is the world's most widespread illness, which is a plague that man receives.
The most widespread mistake of all is that colds are caused by cold. They are not. They are caused by viruses passing on from person to person. You catch a cold by coming into contact directly or indirectly, with someone who already has one. If cold causes colds, it would be reasonable to expect the Eskimos to suffer from them forever. But they do not. And in isolated Arctic regions, explorers have reported being free from colds until coming into contact again with infected people from the outside world by way of packages and mail dropped from airplanes.
During the First World War, soldiers who spent long periods in the trenches, cold and wet, seldom caught colds.
In the Second World War, prisoners at Auschwitz concentration camp, naked and starved, were astonished to find that they seldom had colds.
At the Common Cold Research Unit in England, volunteers took part in experiments in which they gave themselves to the discomforts of being cold and wet for long stretches of time. After taking hot baths, they put on bathing suits, allowed themselves to be with cold water, and then stood about dripping wet in a room. Some wore wet socks all day while others exercised in the rain until close to exhaustion. Not one of the volunteers came down with a cold unless a cold virus was actually dropped in his nose.
If then, cold and wet have nothing to do with catching colds, why are they more frequent in winter? Despite the most hard research, no one has yet found out the answer. One explanation offered by scientists is that people tend to stay together indoors more in cold weather than at other times, and that makes it easier for cold viruses to be passed on.
No one has yet found a cure for the cold. There are drugs and pain-killers such as aspirin, but all that they do is to relieve the symptoms.
1.The writer offered ___ examples to support his argument.
A. 4 B. 5
C. 6 D. 3
2.Arctic explorers may catch colds when___.
A. they are working in the isolated Arctic regions
B. they are writing reports in terribly cold weather
C. they are free from work in the isolated Arctic regions
D. they are coming into touch again with the outside world
3.Volunteers taking part in the experiments in the Common Cold Research Unit___.
A. suffered a lot B. never caught colds
C. often caught colds D. became very strong
4.The passage mainly discusses___.
A. the experiments on the common cold
B. the fallacy about the common cold
C. the reason and the way people catch colds
D. the continued spread of common colds
高二英语阅读理解中等难度题查看答案及解析
The common cold is the world's most widespread illness, which is plagues (瘟疫) that flesh receives. The most widespread fallacy (谬误) of all is that colds are caused by cold. They are not. They are caused by viruses passing on from person to person. You catch a cold by coming into contact, directly or indirectly, with someone who already has one.
If cold causes colds, it would be reasonable to expect the Eskimos to suffer from them forever. But they do not. And in isolated arctic regions explorers have reported being free from colds until coming into contact again with infected people from the outside world by way of packages and mail dropped from airplanes.
During the First World War soldiers who spent long periods in the trenches (战壕) cold and wet, showed no increased tendency to catch colds. In the Second World War prisoners at the notorious Auschwitz concentration camp (奥斯维辛集中营), naked and starving, were astonished to find that they seldom had colds.
At the Common Cold Research Unit in England, volunteers took part in experiments in which they gave themselves to the discomforts of being cold and wet for long stretches of time. After taking hot baths, they put on bathing suits, allowed themselves to be dipped with cold water, and then stood about dripping wet in drafty room. Some wore wet socks all day while others exercised in the rain until close to exhaustion. Not one of the volunteers came down with a cold unless a cold virus was actually dropped in his nose.
If, then, cold and wet have nothing to do with catching colds, why are they more frequent in the winter? Despite the most pains-taking research, no one has yet found the answer. One explanation offered by scientists is that people tend to stay together indoors more in cold weather than at other times, and this makes it easier for cold viruses to be passed on.
No one has yet found a cure for the cold. There are drugs and pain-killer pills such as aspirin, but all they do is relieve the symptoms.
1.How many examples are offered by the writer to support his argument?
A.4 | B.5 | C.6 | D.3 |
2.Which of the following does not agree with the chosen passage?
A.The Eskimos do not suffer from colds all the time. |
B.Colds are not caused by cold. |
C.People suffer from colds just because they like to stay indoors. |
D.A person may catch a cold by touching someone who already has one. |
3.Arctic explorers may catch colds when _______.
A.they are working in the isolated arctic regions |
B.they are writing reports in terribly cold weather |
C.they are free from work in the isolated arctic regions |
D.they are coming into touch again with the outside world |
4.Volunteers taking part in the experiments in the Common Cold Research Unit _______.
A.suffered a lot | B.never caught colds |
C.often caught colds | D.became very strong |
5.The passage mainly discusses _______.
A.the experiments on the common colds |
B.the fallacy about the common cold |
C.the reason and the way people catch colds |
D.the continued spread of common colds |
高二英语阅读理解困难题查看答案及解析
The common cold is the world's most widespread illness, which is a serious infection that man receives.
The most widespread mistake of all is that colds are caused by cold. They are not. They are caused by viruses passing on from person to person. You catch a cold by touching directly or indirectly, with someone who already has one. If cold causes colds, it would be reasonable to expect the Eskimos to suffer from them forever. But they do not. And in separate Arctic (北极的)areas, explorers have reported being free from colds until touching again with infected people from the outside world by way of packages and mail dropped from airplanes.
During the First World War, soldiers who spent long periods in the trenches, cold and wet, seldom caught colds.
In the Second World War, prisoners at Auschwitz concentration camp, bare and starved, were astonished to find that they seldom had colds.
At the Common Cold Research Unit in England, volunteers took part in experiments in which they gave themselves to the discomforts of being cold and wet for a long time. After taking hot baths, they put on bathing suits, allowed themselves to be with cold water, and then stood about dripping wet in a room. Some wore wet socks all day while others exercised in the rain until close to exhaustion. Not one of the volunteers came down with a cold unless a cold virus was actually dropped in his nose.
If then, cold and wet have nothing to do with catching colds, why are they more frequent in winter? Despite the most hard research, no one has yet found out the answer. One explanation offered by scientists is that people tend to stay together indoors more in cold weather than at other times, and that makes it easier for cold viruses to be passed on.
No one has yet found a cure for the cold. There are drugs and pain-killers such as aspirin, but all that they do is to reduce the symptoms.
1.The writer thinks the cause of catching cold is due to_______.
A.touching anyone directly
B.touching anyone indirectly
C.cold weather
D.getting viruses from person to person
2.Arctic explorers may catch colds when___.
A.they are working in the separate Arctic areas
B.they are writing reports in terribly cold weather
C.they are free from work in the isolated Arctic regions
D.they are coming into touch again with the outside world
3.Volunteers taking part in the experiments in the Common Cold Research Unit___.
A.suffered a lot B.never caught colds
C.often caught colds D.became very strong
4.The passage mainly discusses___.
A.the experiments on the common cold
B.the mistake about the common cold
C.the reason and the way people catch colds
D.the continued spread of common colds
高二英语阅读理解中等难度题查看答案及解析
One of the greatest killers in the Western world is heart disease.The death rate( 率) from the disease has been increasing at an alarming speed for the past thirty years.Today in Britain,for example,about four hundred people a day die of heart disease.Medical experts know that people can reduce their chances of getting heart disease by exercising regularly,by not smoking,by changing their diets,and by paying more attention to reducing stress(压力) in their work.
However,Western health-care systems are still not paying enough attention to the prevention of the disease.There is a need for more programs to educate the public about the causes and prevention of heart disease.Instead of supporting such programs,however,the U.S.health-care system is spending large sums of money on the surgical( 外 科 的 ) treatment of the disease after it develops.This emphasis( 强 调 ) on treatment clearly has something to do with the technological advances that have taken place in the past ten to fifteen years.In this time,modern technology has enabled doctors to develop new surgical techniques.Many operations that were considered impossible or too risky(有风险的) a few years ago are now performed every day in U.S.hospitals.The result has been a huge increase in heart surgery.
Although there is no doubt that heart surgery can help a large number of people,some people point out that the emphasis on the surgical treatment of the disease has three clear disadvantages.First,it attracts interest and money away from the question of prevention.Second,it causes the costs of general hospital care to rise.After hospitals buy the expensive equipment that is necessary for modern heart surgery,they must try to recover the money they have spent.To do this,they raise costs for all their patients,not just those patients whose treatment requires the equipment.The third disadvantage is that doctors are encouraged to perform surgery—even on patients for whom an operation is unnecessary—because the equipment and expert skills are there.A government office recently stated that major heart surgery was often performed even though its chances of success were low.In one type of heart surgery,for example,only 15 percent of patients improved their conditions after the surgery.However,more than 100,000 of these operations are performed in the United States every year.
1.What effect has modern technology had on medicine?
A.It has reduced the costs of medical treatment.
B.It hasn’t helped save any patients.
C.It has encouraged doctors to do more heart surgeries.
D.It has helped educate people about the prevention of heart disease.
2.“To do this”(in Paragraph 3) means _____ .
A.to help patients recover
B.to increase the number of heart surgeries
C.to get back the money spent on the equipment
D.to buy new equipment for the treatment of heart disease
3.The author would agree that _____ .
A.more money should be spent on the prevention of heart disease
B.heart surgery has helped most patients improve their conditions
C.modern technology has made heart surgery more risky than before
D.the public have known a great deal about the causes of heart disease
4.Which would be the best title for the passage?
A.The Greatest Killer in the West
B.Heart Disease:Treat or Prevent
C.Old Technology and Heart Surgery
D.Heart Surgery:Advantages
高二英语阅读理解困难题查看答案及解析
I’ve spent most of my career as a traveling salesman, and so I know that 1 is an occupational disease. But one year, my 2 gave me the cure for my homesickness.
It had black bright eyes, a red bow tie and orange feet--- a stuffed penguin (企鹅) that 3about five inches tall. Attached to its left wing 4 a little sign with the hand-painted declaration “ I Love My Dad!”. I immediately 5 the penguin on my table.
On my next trip, I put the 6 in my suitcase. That night when I called home, my daughter Jeanine was 7 because the penguin had disappeared. “Honey, he’s here with me,” I explained, “ I brought him 8 ”.
9, the penguin came with me --- as necessary as my briefcase. And we 10 along the way. In Albuquerque, I checked into a 11 , dropped my bag and ran to a meeting. When I returned, the maid had 12 the bed and stood the penguin on the pillow.
One night, I discovered the penguin 13 , and after a mad phone call, I learned I’d 14 it in my previous hotel room, 15 it had been rescued by a maid. I 16 a hundred miles to get it, and when I arrived at midnight, the penguin was waiting at the front desk. In the hotel lobby (大厅), other tired business travelers were 17 at the reunion of my penguin and me --- I think with a touch of 18.
Jeanine is in college now, and I don’t travel 19. The penguin sits on my table, a reminder that love is a wonderful traveling companion. All those years on 20, it was the one thing I never left home without.
1.A. cold B. hunger C. loneliness D. fever
2.. A. boy B. daughter C. friend D. mother
3.A. stood B. lay C. jumped D. climbed
4. A. wrote B. turned C. was D. had
5.. A. threw B. lost C. gave D. placed
6.. A. bear B. penguin C. dog D. rabbit
7. A. upset B. happy C. glad D. excited
8. A. up B. off C. along D. down
9. A. From now on B. In the future C. In future D. From then on
10. A. had friends B. had friend C. made friends D. made friend
11.A. school B. hotel C. shop D. supermarket
12. A. given B. turned C. made D. carried
13.A. sleeping B. going C. living D. missing
14.A. forget B. left C. ordered D. sent
15.A. there B. when C. where D. how
16. A. ran B. walked C. hurried D. drove
17.A. surprised B. frightened C. looked D. laughed
18. A. anger B. envy C. sadness D. illness
19.A. as many B. as seldom C. so little D. as much
20.A. the hotel B. the meeting C. the road D. the house
高二英语完型填空中等难度题查看答案及解析
I've spent most of my career as a traveling salesman, and so I know that 36is an occupational disease.But one year, my 37 gave me the cure for my homesickness.
It had black bright eyes, a red bow tie and orange feet—a stuffed penguin(企鹅)that 38 about five inches tall.Attached to its left wing 39 a little sign with the hand-painted declaration "I Love My Dad! ".I 40 the penguin at once on my table.
On my next trip, I put the penguin in my suitcase.That night when I 41__ home, my daughter Jeanine was 42 because the penguin had disappeared."Honey, he's here with me, " I explained, "I brought him 43 ."
44, the penguin came with me—as necessary as my briefcase.And we__45 along the way.In Albuquerque, I checked into a 46, dropped my bag and ran to a meeting.When I returned, the maid had 47 the bed and stood the penguin on the pillow.
One night, I discovered the penguin 48, and after a mad phone call, I learned I' d 49 it in my previous hotel room, 50 it had been rescued by a maid.I__51 a hundred miles to get it, and when I arrived at midnight, the penguin was waiting at the front desk.In the hotel lobby(大厅), other tired business travelers were__52 at the reunion of my penguin and me---I think with a bit of 53.
Jeanine is in college now, and I don't travel 54 . The penguin sits on my table, a reminder that love is a wonderful traveling companion.All those years on 55, it was the one thing I never left home without.
1. A.cold B.hunger C.loneliness D.fever
2. A.wife B.daughter C.friend D.mother
3. A.stood B.lay C.jumped D.climbed
4. A.wrote B.turned C.was D.had
5. A.threw B.lost C.ordered D.placed
6. A.drove B.called C.wrote D.went
7. A.upset B.happy C.glad D.excited
8. A.up B.off C.along D.down
9. A.From now on B.In the future C.In future D.From then on
10. A.had friends B.had friend C.made friends D.made friend
11. A.school B.hotel C.shop D.supermarket
12. A.given B.turned C.made D.carried
13. A.sleeping B.going C.living D.missing
14. A.forgot B.left C.ordered D.sent
15. A.there B.when C.where D.how
16. A.ran B.walked C.hurried D.drove
17. A.surprised B.frightened C.looked D.laughed
18. A.anger B.admiration C.sadness D.illness
19. A.as many B.as seldom C.so few D.as much
20. A.the hotel B.the meeting C.the trip D.the house
高二英语完型填空中等难度题查看答案及解析
China may be the world's most populous country ,and it won the most gold medals at the 2008 Summer Olympics in Beijing. But its prowess at soccer is lamentable. China is ranked 84th in the sport's world standing.
Chinese are huge soccer fans, and hundreds of millions are expected to tune in to the World Cup, with all the matches broadcast live on public TV. But this time the Chinese don't have their own team to root for.
"Chinese have a reputation of being good at math, but they have trouble explaining why a population of 1.3 billion cannot produce a winning 11-member soccer team," said Xu Guoqi, a history professor at the University of Hong Kong. Journalists and soccer fans offer a number of reasons, most often money issues, politics, corruption(腐败)and culture, and sometimes a combination of the four.
Even though China now boasts wealthy companies and individuals who could sponsor(赞助) teams, there is little support as long as Chinese teams are perceived as perennial losers. "This is a very bad circle," Ma said. "No results, no money. No money, no results."
Few Chinese children are playing soccer. Some sports journalists and fans attribute the lack of interest partly to schools de-emphasizing sports in general and the lack of playing venues in the country's dense urban areas. "What can Chinese kids do?” said Fan Huiming, 61, a Chinese soccer fan who grew up watching matches at Beijing's Workers' Stadium, which was built in 1958 near his childhood home. "If they play soccer, the ball may fly directly into the glass of someone's home."
For young people, soccer has largely been eclipsed by basketball, thanks in part to Chinese NBA players who are treated like rock stars. Journalists and fans say NBA's aggressive campaign of marketing and merchandise in China has helped swell the popularity of basketball. By comparison, they noted that international soccer does not even have an office in China.
Rowan Simons, a Briton who came to China more than two decades ago and discovered he wasn't able to play weekend soccer, has been on a campaign to popularize the sport here. Simons said the main problem is that soccer elsewhere has traditionally started as a series of neighborhood clubs, but in China, "there's virtually no football at community level".
"Football in China can only succeed if it's a grass-roots activity organized by the people," he said.
1.This time the Chinese don't have their own team to root for in the World Cup because__________.
A.China is ranked 84th in soccer 's world standing. |
B.they are angry about why China cannot produce a winning soccer team. |
C.the Chinese huge soccer fans support other soccer teams. |
D.the Chinese soccer team is not capable to go as far as the final part of the World Cup. |
2.Why are few Chinese children playing soccer?
A.No results, no money. No money, no results.
B.If the footballs fly directly into the glass of someone's home,they’ll be criticised.
C there is little support from wealthy companies and individuals sponsoring teams.
D.schools don’t pay much attention on sports and they lack playing venues in dense urban areas.
3.The underlined word“eclipsed”in the six paragraph can be replaced by.
A.occupied. | B.beaten. | C.led. | D.compared. |
4.According to Rowan,what can be inferred ?
A.NBA players are more popular than soccer players in China. |
B.The future of Chinese football is rather promising. |
C.Chinese football should get into the life of ordinary people to survive. |
D.Grass-roots Chinese football players can be popular . |
高二英语阅读理解简单题查看答案及解析
Just as the world’s most respected scientific bodies have confirmed that the world is getting hotter, they have also stated that there is strong evidence that humans are driving the warming. Countless recent reports from the world’s leading scientific bodies have said the same thing. For example, a 2010 summary of climate science by the Royal Society stated that: “There is strong evidence that the warming of the Earth over the last half-century has been caused largely by human activity.”
The idea that humans could change the planet’s climate may be counter-intuitive (与直觉不符的), but the basic science is well understood. Each year, human activity causes billions of tons of greenhouse gases to be released (释放) into the atmosphere. As scientists have known for years, these gases hold heat that would otherwise escape to space, wrapping the planet in an invisible blanket.
Of course, the planet’s climate has always been changing thanks to “natural” factors such as changes in solar or volcanic activity, or cycles relating the Earth’s going around the sun. According to the scientific literature, however, the warming recorded to date matches the pattern of warming we would expect from a build-up of greenhouse gas in the atmosphere – not the warming we would expect from other possible causes.
Even if scientists did discover another reasonable explanation for the warming observed so far, that would beg a difficult question. As Robert Henson puts it in The Rough Guide to Climate Change: “If some newly discovered factor can account for the climate change, then why can’t carbon dioxide and the other greenhouse gases?
The only way to prove with 100% certainty that humans are responsible for global warming would be to run an experiment with two identical Earths – one with human influence and one without. That obviously isn’t possible, and so most scientists are careful not to state human influence as an absolute certainty.
1.In most scientists’ opinion, the global warming is mainly caused by ____ .
A. solar activity
B. volcanic activity
C. the Earth’s going around the sun
D. human activity
2.The text is developed by ____ .
A. giving typical examples
B. following the order of space
C. analyzing a theory and arguing it
D. comparing and finding differences
3.The underline word “identical” means ____ .
A. totally different B. exactly the same
C. extremely important D. relatively independent
高二英语阅读理解中等难度题查看答案及解析