A scientific report has found that snow and i...

A scientific report has found that snow and ice on Africa’s highest mountain Kilimanjaro ______rapidly and could vanish within 20 years.

A．has been melted                        B．will melt

C．is melting                             D．was being melted

高三英语单项填空中等难度题查看答案及解析

The report has found that more and more Chinese have 　　 an American or British temporary visa for holiday spending in recent years.

A. stood for　　 B. applied for

C. accounted for　 D. searched for

高三英语单项填空中等难度题查看答案及解析

In the dry Namib Desert on the west coast of Africa, one type of beetle has found a special way of surviving. When the morning arrives, the Namib Beetle collects water drops on its bumpy(起伏不平的) back, then lets the water roll down into its mouth, allowing it to drink in an area without flowing water.

Shreerang Chhatre wants to use what nature has developed to help the world’s poor. Chhatre is an engineer at MIT who works on fog harvesting, the equipment that, like the beetle, attracts water drops. This way, poor villagers could collect clean water near their homes, instead of spending hours carrying water from distant wells or rivers.

Access to water is a serious global issue. According to the World Health Organization and UNICEF, nearly 900 million people worldwide live without safe drinking water. The burden of finding and transporting water falls heavily on women and children. “As a middle-class person, I think it’s terrible that the poor have to spend hours a day walking just to obtain a basic necessity,” Chhatre says.

A fog-harvesting machine consists of a fence-like mesh panel(网状面板), which attracts drops, connected to containers into which water falls. Chhatre has improved the materials used in these machines. He is continuing his work at MIT Sloan and the Legaturn Center in order to develop a workable business plan for applying fog-harvesting machines.

Interest in fog harvesting dates back to the 1990s, and has increased since new research on the Namib Beetle became famous in 2001. A few technologists saw potential in the concept for people. One Canadian charitable organization, FogQuest, has tested projects in Chile and Guatemala.

But fog harvesting remains in its childhood, technologically and commercially, as Chhatre readily recognizes. “It still faces some open problems,” he says. “But it’s a work in progress.” After all, the water that fills our rivers and lakes comes from air.

1.Which of the following is TRUE of Shreerang Chhatre?

A. He is an African engineer.

B. He is researching on the Namib Beetle.

C. He has made the first fog-harvesting machines to use.

D. He is trying to put fog-harvesting machines to use.

2.Why is Namib Beetle mentioned in the passage?

A. To describe the severe conditions in Namib Desert.

B. To introduce the diversity of species in Namib Desert.

C. To inform how animal nature can be used to benefit people.

D. To raise the awareness of accessing clean drinking water in poor areas.

3.The underlined word “it” in the last paragraph refers to _________.

A. UNICEF　　 B. the beetle

C. fog harvesting　　 D. a Canadian charitable organization

4.The author’s main purpose in writing the text is to ________.

A. stress the importance of saving water

B. show the Namib Beetle’s special way of surviving

C. introduce a new machine for collecting water from air

D. inform people of the serious water problem in Africa

高三英语阅读理解中等难度题查看答案及解析

A report released this month found that grouping children by ability is on the rise again— teaching students in groups of similar ability has improved achievement for fast and slow learners alike—and who wouldn’t want bright kids to be able to move ahead, or strugglers to get the help they need?

But for most kids, labels (标签) applied early in life tend to stick, even if they are wrong.

Sorting school children by ability has long been controversial. In some countries, especially in Asia, school-wide tracking (分流) remains normal. Children are tested and placed in different schools that direct them toward professional or vocational careers. Movement between the tracks is rare.

School-wide tracking decreased in U.S. schools in the 1960s and ’70s. It never died out, though. Sorting students into separate tracks for math at about junior high school age continues to be common, and other forms of tracking persist as well.

Unlike tracking, which means sorting students into separate classrooms, ability grouping happens within classrooms. When done according to the latest research, it has proven to promote achievement.

Ability grouping is changeable and temporary. Within classrooms, students might be divided into different learning groups dealing with materials of different levels. Any students who master concepts can move upward between groups, and the student groups might look different from subject to subject and unit to unit. For instance, a student who stands out in language arts might be at an average or slower level in math. A student who flies through multiplication tables might need extra help with fractions. Students who lag in reading can be pulled out of the classroom in small groups for practice with a tutor until their reading improves.

Research shows ability grouping within classes has more positive benefits than tracking. However, that must be weighed against the challenges involved. In many regular classrooms, the differences between student ability levels are very big. That presents challenges for teachers and low-performing students to constantly compare themselves with students who seem to fly through school with ease.

The rigid ability groups and tracking of the past are still with us in many schools. Likely, labels are applied with more caution than in the bad old days when some teachers gave reading groups not-so-secret code names like “Bluebirds”, “Robins”, “Crows” and “Buzzards”. But kids still know.

1.Why is grouping children by ability becoming popular again?

A. Because most teachers do not like slower learners.

B. Because grouping children should be done early in life.

C. Because it is academically beneficial to different learners.

D. Because fast learners can move ahead without teachers’ help.

2.By saying “Movement between the tracks is rare.” (Para 3), the writer really means______.

A. tracking children is normal in Asia

B. school-wide tracking has decreased in US

C. professional and vocational careers are unrelated

D. sorted students can hardly change schools

3.The examples in Paragraph 6 are used mainly to illustrate ______.

A. a good language learner promises to be good at maths

B. a student might join different groups for different courses

C. ability grouping benefits gifted students more than slow ones

D. ability grouping presents no challenge for those slow students

4.What might be the challenge in regular classrooms for teachers?

A. Students’ different levels.

B. Students’ low performance.

C. Constant self-comparison.

D. Application of not-so-secret code.

高三英语阅读理解困难题查看答案及解析

A report released this month found that grouping children by ability is on the rise again—teaching students in groups of similar ability has improved achievements for fast and slow learners alike—and who wouldn’t want bright kids to be able to move ahead?

But for most kids, labels (标签) applied early in life tend to stick, even if they are wrong.

Sorting school children by ability has long been controversial. In some countries, especially in Asia, school-wide tracking (分流) remains normal. Children are tested and placed in different schools that direct them toward professional or vocational careers. Movement between the tracks is rare.

School-wide tracking decreased in US schools in the 1960s and 1970s. It never died out, though. Sorting students into separate tracks for math at about junior high school age continues to be common, and other forms of tracking persist as well.

Unlike tracking, which means sorting students into separate classrooms, ability grouping happens within classrooms. When done according to the latest research, it has proven to promote achievements. Ability grouping is changeable and temporary. Within classrooms, students might be divided into different learning groups dealing with materials of different levels. Any students who master concepts can move upward between groups, and the student groups might look different from subject to subject and unit to unit. For instance, a student who stands out in language arts might be at an average or slower level in math. A student who flies through multiplication tables might need extra help with fractions. Students who lag in reading can be pulled out of the classroom in small groups for practice with a tutor until their reading improves.

Research shows ability grouping within classes has more positive benefits than tracking. However, that must be weighed against the challenges involved. In many regular classrooms, the differences between student ability levels are very big. That presents challenges for teachers and low-performing students to constantly compare themselves with students who seem to fly through school with ease.

The rigid ability groups and tracking of the past are still with us in many schools. Likely, labels are applied with more caution than in the bad old days when some teachers gave reading groups not-so-secret code names like “Bluebirds”, “Robins”, “Crows” and “Buzzards”. But kids still know.

1.Why is grouping children by ability becoming popular again?

A. Because most teachers do not like slower learners.

B. Because grouping children should be done early in life.

C. Because it is academically beneficial to different learners.

D. Because fast learners can move ahead without teachers’ help.

2.By saying “Movement between the tracks is rare.” in paragraph 3, the writer really means　　　　　　　　 .

A. tracking children is normal in Asia

B. school-wide tracking has decreased in US

C. professional and vocational careers are unrelated

D. sorted students can hardly change schools

3.The examples in paragraph 5 are used mainly to illustrate　　　　　　　　 .

A. a good language learner promises to be good at math

B. a student might join different groups for different courses

C. ability grouping benefits gifted students more than slow ones

D. ability grouping presents no challenge for those slow students

4.What might be the challenge in regular classrooms for teachers?

A. Students’ different levels. B. Students’ low performance.

C. Constant self-comparison. D. Application of not-so-secret code.

高三英语阅读理解困难题查看答案及解析

It’s interesting that the arrival of snow has effect on people in different countries. For some countries it is an important happening to celebrate each year, while for others a catastrophe(灾害) or even a wonder.

　But there are countries between these two kinds that normally expect snow some time over the winter months, but never receive snow regularly or in the same quantities every year. Britain is one of them, for which the arrival of snow quite simply causes problems. Within hours of the first snowfalls, however light, roads are blocked, trains and buses have to stop in the middle of the way. Normal communication is affected as well: telephone calls become difficult and the post immediately takes more time than usual. And almost within hours, there are also certain shortages----bread, vegetables and other things-----not because all these things can no longer be produced or sent to shops, but mainly because people are frightened and go out and store up with food and so on…just for fear that something bad should happen.

　But why does snow have this effect? After all, the Swiss, the Austrians and the Canadians don‘t have such problems. It is simple because there is not enough planning and preparation. We need money to buy equipment to deal with snow and ice. To keep the roads clear, for example, requires snow-ploughs(扫雪机) and machines to spread salt. The reason why a country like Britain does not buy snow-ploughs is that they are used for a few days in any one year, and the money could be more useful in other things such as hospital, education, helping the old and so on..

1.According to the writer, Britain is a country ________.

　2.After a few hours’ snowing there are often some shortages of food because ______.

　A. shops have closed down B. people buy as much as they can

　B. farmers cannot produce any more D. people eat more vegetables in winter

　3.The words "two kinds" in the passage mean the countries ______.

高三英语阅读理解中等难度题查看答案及解析

A report found that over half of the high school boys and two-thirds of the girls never shower after sports at school. Researchers suggest students don't want to sweat 1.　　 take a shower, so they are less active. The researchers questioned almost 4,000 children. Lead researcher Dr Gavin said he was surprised 　　 2. how rarely students showered. He said children were getting poor health because of less exercise. He said: "　　 3. the unwillingness to shower is a barrier（障碍）to playing sport, we need to do something to promote activity at schools."

4.　 , the BBC says the study did not look at the exact reasons 　 5.　 students do not shower. Maybe there are some other reasons. Undressing in front of 　 6.　 may be too much for some children. A spokeswoman for a health organisation said children worry about their body image. She said schools had 　　 7. role to play in changing attitudes. She said schools should encourage students to do physical activity and let 　 8.　 know they need to shower after.

高三英语其他题中等难度题查看答案及解析

The Royal Commission on Environmental Pollution has just published a report on new materials and has looked at the case of nanotechnology（纳米技术）, which describes the science of the very small. Nanotechnology covers those man-made materials or objects that are about a thousand times smaller than the microtechnology（微电子技术）we use, such as the silicon chips of computers.

Nanotechnology gets its name from the nanometer, which is a billionth of a meter. There are about 600 consumer products already on the market that use nanotechnology. Nanomedicine is also being developed to fight cancer and other fatal diseases.

The Royal Commission found no evidence of harm to health or the environment from nanomaterials, but this “absence of evidence” is not being taken as “evidence of absence”. In other words, just because there are no apparent problems, this is not to say that here is no risk now or in the future. The commission is concerned about the pace at which we are inventing and adopting new nanomaterials, which could result in future problems that we are ill-equipped to understand or even find with current testing methods.

One of the problems about nanotechnology is that when we make something very small out of a well known material, we may actually change the functionality of that material even if the chemical composition remains the same. Indeed, it is not the particle（颗粒）size that should concern us, but its functionality. Take gold, for example, which is a famously inert (惰性) substance, and valuable because of it. It doesn’t rust or corrode because it doesn’t interact with water or oxygen. However, a particle of gold that is between 2 and 5 nanometers in diameter becomes highly reactive. This is not due to a change in chemical composition, but because of a change in the physical size of the gold particles. How can a change in size result in a change of function? One reason is to do with surface area. Nanoparticles have relatively a much bigger surface area. It is like comparing the surface area of a basketball with the total surface area of many pea-sized balls with the same weight of the single basketball. The pea-sized balls have a surface area many hundreds, indeed thousands of times bigger than the basketball, and this allows them to interact more easily with the environment. It is this increased interactivity that changes their functionality—and makes them potentially more dangerous to health or the environment.

1.Why does the writer mention microtechnology in the first paragraph?

A. to introduce the topic of nanotechnology

B. to help us better understand nanotechnology

C. to help us know more about microtechnology

D. to compare microtechnology with nanotechnology

2.The example of the “gold” in the last paragraph is intended to show that_________.

A. gold is valuable because it is an inert substance

B. an inert substance like gold doesn’t interact with water or oxygen

C. the function of gold is steady because it is an inert substance

D. the function of gold changes when made into something very small

3.Which process explains that there might be risks in nanotechnology?

A. expand surface area →increase interactivity → change functionality→cause possible dangers

B. expand surface area → change functionality → increase interactivity →cause possible dangers

C. increase interactivity → expand surface area → change functionality→cause possible dangers

D. increase interactivity → change functionality → expand surface area→cause possible dangers

4.What does the passage mainly focus on?

A. the introduction of nanotechnology and its wide use

B. the present use of nanotechnology and its future

C. the potential danger nanotechnology may bring us

D. the proposal to stop nanotechnology due to the potential danger

高三英语阅读理解中等难度题查看答案及解析

An important scientific report announced “irrefutable（不能反驳的） proof” that climate change is happening and it’s all our fault. How long has it been before people are against the global warming idea? But here’s a funny thing. Last year there was a very bad hurricane season in the Caribbean when, among other disasters, New Orleans was all but wiped off the map. We were wisely informed by the experts at the time that this was owing to global warming.

I remember watching a BBC science programme and hearing a learned professor with a beard tell us, “The increased frequency and strength of hurricanes is what we shall have to learn to expect given global warming.”

This year there have been far fewer hurricanes and those there have been were relatively mild. Why？Global warming again of course. Professor Bjorn Lomborg, author of The Skeptical Environmentalist, writes, “In the constant media reports of possible greenhouse related disasters, almost any event is now linked to climate change.” He adds, “We should not spend vast amounts of money to cut a tiny slice of the global temperature increase when this leads to a poor use of resources and when we could probably use these funds far more effectively in the developing world.” For saying this, Lomborg has had death threats.

Other scientists who do not toe the global warming-is-happening-and-it’s-all-our-fault line have received the same. There are plenty of people who count against global warming. A world of senior climatologists and meteorologists wrote to the Times last year to complain that they couldn’t get their research findings published — because they disagreed to it. We have had a warm autumn. The experts,  fanatics（狂热者） all of them, put it down to global warming. If we have an extra cold winter, they will tell us it’s a result of global warming. If my big toe feels cold or hurts badly, it will be owing to global warming.

52. The purpose of this passage may be to ____.

A. support the idea of global warming

B. organize a debate about global warming

C. speak out against the global warming idea

D. encourage people to use money effectively

53. What happened to New Orleans last year?

A. It was badly destroyed.                          B. It disappeared in the world.

C. It witnessed global warming.               D. It experienced several disasters.

54. From the passage, we can infer that ____.

A. people are taking too many efforts to stop global warming

B. people have realized the side effect of development

C. a different idea sometimes may cost one his life

D. the majority usually stand for the correct opinion

55. The main idea of the last paragraph may be ____.

A. global warming may lead to toe’s catching cold in a sense

B. the Times refuses to publish articles on global warming

C. a warming autumn is not related to global warming at all

D. it is certainly incorrect to owe everything to global warming

高三英语阅读理解简单题查看答案及解析

Daniel Mazur and his companions spent seven hours climbing up Mt Everest through ice and snow, digging the crampons（攀岩用鞋冰爪）into the ice and taking _____steps. They were less than three hours away from the spectacular 29,017-foot summit. As Daniel looked out on the ______peaks below, he suddenly saw a flash of bright yellow to his left. To his _____, it moved.“What the hell ?”he _____. When he _____, Daniel noticed a man sitting on the edge of a cliff, with no hat, gloves or _____. Pulling his frostbitten hands out of his snowsuit, the man named Hall burst into laughter. _____, he suffered from cerebral edema(脑水肿), which______ to his loss of consciousness. The other men ______Hall away from the cliff 's edge and helped him back into his ______. They attached their ropes to Hall in case he _____off the cliff. They were______when two Italian climbers, intent on reaching the summit, passed by. Sadly, they______to help. It _____Daniel and his team two days to lower Hall down. As soon as they arrived at the safe and suitable place, Hall was sent to the hospital immediately.

____their help, Hall could very well have died on Everest . Although his rescue is a_____, it has caused a debate on climbers who leave behind the sick and injured in ______ of Everest's grand prize. “Once you are up there, you _____as though you could do anything.” Danie said, “Sure, I wish I could have reached the _____again. But there's no _____we could have left Hall on that ridge.”

1.A.special B.severe C.cautious D.worried

2.A.snow-covered B.fog-covered C.water-covered D.rock-covered

3.A.embarrassment B.amazement C.excitement D.amusement

4.A.wandered B.discovered C.wondered D.cried

5.A.started B.thought C.stayed D.approached

6.A.trousers B.shoes C.snowsuits D.sunglasses

7.A.Finally B.Normally C.Obviously D.Easily

8.A.led B.returned C.responded D.adapted

9.A.spread B.drew C.brought D.broke

10.A.snowsuit B.jacket C.spacesuit D.coat

11.A.hurried B.blew C.climbed D.slipped

12.A.relieved B.surprised C.confused D.worried

13.A.offered B.refused C.hesitated D.tended

14.A.finished B.paid C.spent D.took

15.A.Except B.Without C.besides D.With

16.A.mystery B.miracle C.routine D.sight

17.A.need B.favour C.pursuit D.search

18.A.save B.deserve C.decide D.feel

19.A.bottom B.cliff C.edge D.summit

20.A.way B.doubt C.trouble D.sign

高三英语完形填空中等难度题查看答案及解析