The heaviest snow continued to fall over larg...

The heaviest snow continued to fall over large parts of China,________traffic jams.

A．caused         B．causing        C．to cause       D．having caused

高三英语单项填空中等难度题查看答案及解析

Heaviest snow in half a century hit the south of the country. It snowed continuously for half a month, _______the railways, highways, and runways in the airfields. Ice wrapped and paralyzed（使瘫痪）the power and communication system. Many people were_______in railway stations, bus stations and airports, and_______in cars, buses and trains. Governments and people did everything they could to fight the snow_______, resulting in the good news that no one was killed from_______and hunger. Gradually, trapped people all went back home_______. While fighting the snow, people forgot their_______until a moving story of a swallow couple was widely_______on the Internet.

Being hungry and cold, the swallow couple tried to fly_______people's home to warm themselves, but every house was closed________. They jumped and flapped their wings to________the attention of the people inside the house, but failed. The wife’s body was________, she could not move any longer. The husband came near and wrapped his wife with his wings. He lost his________soon because of his opened wings. The couple died in the end.

The next morning, the housemaster went to the balcony to________his flowers because of concern and saw a________swallow outside the window pane. Touching it, he found that they were two________together. Moved to tears, he took them in, giving them some________, but in vain. He found a small cardboard box, laid them in and________them in the back garden.

In my hometown, in the countryside, a swallow family lives in the________of my house. I wonder if they will come back this spring________they did.

1.A. protecting　　 B. maintaining　　 C. blocking　　 D. keeping

2.A. restricted　　 B. stuck　　 C. surrounded　　 D. persuaded

3.A. even　　 B. still　　 C. yet　　 D. nevertheless

4.A. disturbance　　 B. occurrence　　 C. incident　　 D. disaster

5.A. cold　　 B. disease　　 C. poverty　　 D. thirsty

6.A. merrily　　 B. safely　　 C. excitedly　　 D. exhaustedly

7.A. family　　 B. distant relatives　　 C. parents　　 D. animal friends

8.A. broadcast　　 B. written　　 C. spread　　 D. identified

9.A. into　　 B. through　　 C. beyond　　 D. across

10.A. tightly　　 B. early　　 C. secretly　　 D. quickly

11.A. pay　　 B. attract　　 C. resist　　 D. keep

12.A. injured　　 B. lifted　　 C. frozen　　 D. broken

13.A. heat　　 B. strength　　 C. direction　　 D. eyesight

14.A. water　　 B. plant　　 C. dig　　 D. check

15.A. dead　　 B. drunk　　 C. lively　　 D. lovely

16.A. touching　　 B. embracing　　 C. living　　 D. lying

17.A. warmth　　 B. food　　 C. kindness　　 D. fruit

18.A. left　　 B. sheltered　　 C. buried　　 D. threw

19.A. roof　　 B. basement　　 C. window　　 D. wall

20.A. when　　 B. as　　 C. unless　　 D. if

高三英语完形填空中等难度题查看答案及解析

Damage to Ozone Layer Gets Worse

In the middle of winter, when snow is falling in many parts of the United States, scientists have sounded a warning to people who plan to spend many hours in the sun this summer．The warning: The sun's summertime rays are more dangerous than once thought.

A team of scientists from 80 nations recently reported to the United Nations that a layer of ozone（臭氧层）in the atmosphere, which protects humans from harmful levels of ultraviolet（紫外线）radiation, will be thinner over the United States this summer．The thinner layer allows more ultraviolet rays from the sun to reach Earth．The extra amount of ultraviolet radiation could cause an increase in the number of cases of skin cancer.

Scientists first became concerned about the layer in the mid-1980s when a hole was discovered in the layer above Antarctica during the winter．The hole was caused in chemicals used in refrigerators and air conditioners．When these chemicals are sent out into the atmosphere, they produce gases that destroy the ozone.

Concern about the protective ozone layer rose more recently when data from satellites and ground stations showed that ozone levels were dropping over areas other than Antarctica．Low ozone levels were recorded in the spring and summer over the United States and over other populated areas in the world.

Although many countries have already begun stopping the use of ozone-destroying chemicals, the new findings are expected to advance the timetable for a total ban of the chemicals.

1.The scientists have observed the ozone layer ______．

A．since 1980                     B．since last winter

C．for more than 20 years            D．for about one year

2.The ozone layer in the atmosphere can ______.

A．do a lot of good to human beings in many ways

B．protect humans from diseases caused by bad weather

C．do a lot of harm to human beings in the summer-time

D．protect humans from harmful levels of ultraviolet radiation

3.Scientists first found that there was a hole in the ozone layer ______.

A．above Arctic during the winter in the mid-1980s

B．above Antarctica during the winter in the mid-1980s

C．over somewhere in the north of the equator in 1980

D．over the USA in the summertime in the mid-1980s

4.The damage to the ozone layer was caused by ______.

A．the changeable weather          B．ozone-destroying chemicals

C．chemicals from refrigerators      D．chemicals from air conditioners

高三英语阅读理解中等难度题查看答案及解析

Snow falls in the Earth’s extreme North and South throughout the year. However， the heaviest snowfalls have been reported in the mountains of other areas during winter. Snow is even known to fall near the Equator (赤道)，but only on the highest mountains.

Snow contains much less water than rain, but much of the water the world uses comes from snow. Melting snow provides water for rivers, electric power stations and agricultural crops. In the western United States, mountain snow provides up to seventy-five percent of all surface water supplies.

Snowfall helps to protect plants and some wild animals from winter weather. Fresh snow is made largely of air trapped among the snow crystals (晶体). Because the air has trouble moving, the movement of heat is limited. Snow also influences the movement of sound waves. The surface of the snow takes in, or absorbs, sound waves. As snow grows older or if there have been strong winds, it can become hard and flat. Then, the snow，s surface will help to send back sound waves.

Snow may be beautiful, but it can be deadly. It is responsible for the deaths of hundreds of people. Many people die in traffic accidents on roads covered with snow and ice or from being seriously stuck in the winter storm. Others die from heart attacks caused by too much physical activity out in the cold.

People may not be able to avoid living in areas where it snows often. However, they can avoid becoming victims of snowstorms. People should stop driving and stay at home until the storm has passed. People living in these areas should carry emergency supplies in their vehicle. These include food，emergency medical supplies，and extra clothing to stay warm and dry.

1.Mountain snowfall _____.

A．is heavier than that in the South and the North Poles

B．has never occurred near the Equator of the earth

C．brings less of the water the world uses than rain does

D．provides up to seventy—five percent of water supplies worldwide

2.Snow protects plants and wild animals from cold weather by _____.

A．supplying much more air                  B．limiting heat movement

C．absorbing strong winds                   D．sending back sound waves

3.Snow can be deadly mainly because it can _____.

A．cause road accidents

B．make people stuck in winter storms

C．lead to heart attacks

D．make people victims of snowstorms

4.What will the text probably tell us following the last paragraph? _.

A．How to drive during snowstorms

B．Where we can get emergency supplies

C．How to prevent heart attacks out in cold

D．Why we should stay warm and dry in winter

高三英语阅读理解简单题查看答案及解析

The snow was falling. The schools were over earlier than usual, but much to my surprise my appointment wasn’t canceled. And so I went, feeling especially heroic. Snow or no snow, I’d be on time for my scheduled donation at the local blood center.

When I got there, I discovered four more “hero-types” were already there, with machines quietly collecting their lifesaving gifts. Seeing them made me believe that while I was proud to be there, I wasn’t a hero. And any silly heroic thoughts quickly disappeared as I lay back in my own donor chair and began my donation. I was ready to make a difference in the life of someone I’ d never meet.

My wife Karen is a donor, too. She’s been on the bone marrow (骨髓) list for fifteen years, ever since she signed up to provide bone marrow to a child. That little girl died before Karen’s bone marrow could help her, but Karen was called again recently as it turned out she might be a match for someone else. The caller asked Karen if she’d still be willing to become a bone marrow donor. “Yes,” she said and then immediately began answering questions in preparation for the pages of paperwork to follow. It was a race against time. I wish I could say this race was won, but again it wasn’t.

Last week Karen gave blood and next week I’ll make my usual donation. I’ll clear an afternoon from my schedule and call for an appointment. Whatever blood product they need whole, I’ll gladly give. I don’t know whose life my donation may affect, but it really doesn’t matter. And sadly, while so few among us actually take the time to donate, Karen and I always will.

1.What can be inferred about the author from the first paragraph?

A.He is quite fond of taking risks.

B.He is a man who always keeps his word.

C.The snow almost ruined his appointment.

D.He never thinks donating blood is a heroic deed.

2.What influence did other donors have on the author?

A.They changed his attitude to himself.

B.They helped him find joy in donating.

C.They made him feel it a duty to donate.

D.They strengthened his belief not to be a donor.

3.What does the passage say about Karen and her bone marrow donation?

A.She has been found a match to nobody.

B.She decided to join in it over 20 years ago.

C.She fell in trouble when she came to paperwork.

D.She has already met with two failures in donation.

4.Which of the following shows the author’s opinion?

A.More people should have become donors.

B.The donation itself should have been made easier.

C.Receivers should have been introduced to donors.

D.More blood products should have been developed.

高三英语阅读理解中等难度题查看答案及解析

Industrial _________ continues to fall with production down more than 6% as the end of Judy.

高三英语单项填空简单题查看答案及解析

Winter is coming, and some parts of the world are already covered with deep snow. The best way to warm those cold hands is a cup of hot sweet chocolate. Hot chocolate has been used for many years to treat diseases and fight bad moods. It’s known as a special healthy drink from the 16th to 19th centuries, and sometimes was taken us a medicine. Nowadays people don’t consider hot chocolate as a medicine, but drink even more than ever! There are plenty of tasty and healthy hot chocolate recipes (烹饪法) you can try to enjoy the following health benefits of drinking hot chocolate.

It improves your brain power

The study shows that drinking hot chocolate can help improve your brain power and your brain health. The flavonoids (类黄酮) in hot chocolate increase the blood flow and oxygen to your brain, helping you think better. If you want to improve your memory, try drinking two cups of hot chocolate a day. Not only will you improve your memory, but your mood as well. Just make sure you don’t use too much sugar in your hot chocolate.

It improves your mood

Chocolate, including hot chocolate, is well-known mood booster. This tasty drink helps fight stress, anxiety, and depression. But the problem is, hot chocolate may contain high amounts of sugar. Consider making sugar-free hot chocolate to get all its mood-improving properties (特性).

It can help you lose weight

If you are trying to drop a few pounds, drinking hot chocolate can help you achieve your weight loss goal. When made correctly, hot chocolate is a delicious and low calorie drink that you can enjoy every time you have chocolate desire. Besides, drinking a cup of low calorie hot chocolate helps prevent the intake of high-calorie and sugar foods like cakes.

Now that you’re aware of some of the best health benefits of drinking chocolate, what are you waiting for? Rush into your kitchen and make this fantastic winter drink.

1.Hot chocolate is popular in winter because 　　　　 .

A. it can make your cold hands warm

B. it has been used for many years

C. it was used to treat kinds of illnesses

D. it is regarded as the healthiest drink

2.In the passage the author mainly talks about 　　　　 .

A. different hot chocolate recipes

B. materials used to make hot chocolate

C. side effects from drinking chocolate

D. benefits of drinking hot chocolate

3.It can be inferred from the passage that 　　　　 .

A. hot chocolate is the only way to improve mood

B. most people can be addicted to chocolate

C. remember never to have sugar in drink

D. food in low calorie makes you healthy

高三英语阅读理解中等难度题查看答案及解析

The number of snow geese arriving in the Arctic each spring to breed has skyrocketed over the past few decades. At first, wildlife biologists saw this as an environmental crisis, pointing to marshes (湿地） where plants were eaten by thousands of hungry birds. In response, the federal government loosened restrictions on snow goose hunting to protect the ecosystem.

But how do the Inuit, in whose backyard this is taking place, view the situation? A recent initiative is giving Inuit wildlife experts the opportunity to lend their knowledge to managing the species. The snow goose study, which is supported in part by Polar Knowledge Board(an　 Inuit organization that manages hunting, trapping and fishing in central Nunavut),asked the experts to share their generations of knowledge about snow geese and their views on what should be done.

＂The community had concerns about controlling the population," says Ron, a community officer for the Inuit Association," and Inuit snow goose knowledge had never been recorded. People wanted to pass on what they knew."

Inuit wildlife experts disagreed with that, considering it wasteful and unnecessary. They felt hunting more snow geese in an organized way, such as paying local hunters a minimal amount of money and distributing the birds to disadvantaged families or operating a limited commercial hunt by employing local people, would be appropriate.

Inuit wildlife experts will meet scientists this fall to search for common ground. They say that while there may be too many snow geese in some areas, it's not a crisis. Biologists now generally agree that there seem to be plenty of undamaged marshes available and newer research shows that some damaged areas can recover.

Conservation planners for the three migratory bird protection zones in the area will use the study's recommendations-an example of how native knowledge can strengthen wildlife management." It is providing people who the decisions affect with a real, practical way to make recommendations and influence what happens," says Vicky Johnston, a biologist and manager with the Canadian Wildlife Service involved in the project.

＂Now that we have recorded and documented Inuit knowledge of snow geese," says Ron, ＂when facing the crisis, other people will be able to use the information to help manage the species, which is fundamental to dealing with it effectively."

1.Which of the following might Inuit wildlife experts agree with?

A.Organizing large commercial hunts.

B.Using snow goose hunting to man's best advantage.

C.Regarding too many snow geese as a crisis.

D.Hunting as many snow geese as possible.

2.What might biologists think about the marshes' future now?

A.It's unpredictable.

B.It's a bit promising.

C.It's too discouraging.

D.It's hard to get better.

3.What does the underlined word "it" in the last paragraph refer to?

A.The crisis.

B.Inuit knowledge.

C.The species.

D.Inuit research.

高三英语阅读理解中等难度题查看答案及解析

When prehistoric man arrived in new parts of the world, something strange happened to the large animals. They suddenly became extinct. Smaller species survived. The large, slow-growing animals were easy game, and were quickly hunted to extinction. Now something similar could be happening in the oceans.

That the seas are being overfished has been known for years. What researchers such as Ransom Myers and Boris Worm have shown is just how fast things are changing. They have looked at half a century of data from fisheries around the world. Their methods do not attempt to estimate the actual biomass (the amount of living biological matter) of fish species in particular parts of the ocean, but rather changes in that biomass over time. According to their latest paper published in Nature, the biomass of large predators (animals that kill and eat other animals) in a new fishery is reduced on average by 80% within 15 years of the start of exploitation. In some long-fished areas, it has halved again since then.

Dr. Worm acknowledges that the figures are conservative. One reason for this is that fishing technology has improved. Today's vessels (船)can find their prey using satellites and sonar, which were not available 50 years ago. That means a higher proportion of what is in the sea is being caught, so the real difference between present and past is likely to be worse than the one recorded by changes in catch sizes. In the early days, too, longlines (多钩长线) would have been more filled with fish. Some individuals would therefore not have been caught, since no baited hooks (带饵钩)would have been available to trap them, leading to an underestimate of fish stocks in the past. Furthermore, in the early days of longline fishing, a lot of fish were lost to sharks after they had been hooked. That is no longer a problem, because there are fewer sharks around now。

Dr. Myers and Dr. Worm argue that their work gives a correct baseline, which future management efforts must take into account. They believe the data support an idea current among marine biologists, that of the “shifting baseline". The idea is that people have failed to detect the massive changes which have happened in the ocean because they have been looking back only a relatively short time into the past. That matters because theory suggests that the maximum sustainable yield （产量）that can be cropped from a fishery comes when the biomass of a target species is about 50% of its original levels。. Most fisheries are well below that, which is a bad way to do business.

1.The extinction of large prehistoric animals is noted to suggest that____.

A.large animals were easily hurt in the changing environment

B.small species survived as large animals disappeared

C.large sea animals may face the same threat today

D.slow-growing fish outlive fast-growing ones

2.By saying these figures are conservative , Dr. Worm means that____ .

A.fishing technology has improved rapidly

B.the catch-sizes are actually smaller than recorded

C.the marine biomass has suffered a greater loss

D.the data collected so far are out of date

3.Dr. Myers and other researchers hold that____ .

A.people should look for a baseline that can't work for a longer time

B.fisheries should keep the yield below 50% of the biomass

C.the ocean biomass should restore its original level

D.people should adjust the fishing baseline to changing situation

4.The writer seems to be mainly concerned with most fisheries’____ .

A.biomass level B.management efficiency

C.catch-size limits D.technological application

高三英语阅读理解困难题查看答案及解析

When prehistoric man arrived in new parts of the world, something strange happened to the large animals. They suddenly became extinct. Smaller species survived. The large, slow-growing animals were easy game, and were quickly hunted to extinction. Now something similar could be happening in the oceans.

That the seas are being overfished has been known for years. What researchers such as Ransom Myers and Boris Worm have shown is just how fast things are changing. They have looked at half a century of data from fisheries around the world. Their methods do not attempt to estimate the actual biomass (the amount of living biological matter) of fish species in particular parts of the ocean, but rather changes in that biomass over time. According to their latest paper published in Nature, the biomass of large predators (animals that kill and eat other animals) in a new fishery is reduced on average by 80% within 15 years of the start of exploitation. In some long-fished areas, it has halved again since then.

Dr. Worm acknowledges that the figures are conservative. One reason for this is that fishing technology has improved. Today's vessels (船)can find their prey using satellites and sonar, which were not available 50 years ago. That means a higher proportion of what is in the sea is being caught, so the real difference between present and past is likely to be worse than the one recorded by changes in catch sizes. In the early days, too, longlines (多钩长线) would have been more filled with fish. Some individuals would therefore not have been caught, since no baited hooks (带饵钩)would have been available to trap them, leading to an underestimate of fish stocks in the past. Furthermore, in the early days of longline fishing, a lot of fish were lost to sharks after they had been hooked. That is no longer a problem, because there are fewer sharks around now。

Dr. Myers and Dr. Worm argue that their work gives a correct baseline, which future management efforts must take into account. They believe the data support an idea current among marine biologists, that of the “shifting baseline". The idea is that people have failed to detect the massive changes which have happened in the ocean because they have been looking back only a relatively short time into the past. That matters because theory suggests that the maximum sustainable yield （产量）that can be cropped from a fishery comes when the biomass of a target species is about 50% of its original levels. Most fisheries are well below that, which is a bad way to do business.

1.The extinction of large prehistoric animals is noted to suggest that .

A.large animals were easily hurt in the changing environment

B.small species survived as large animals disappeared

C.large sea animals may face the same threat today

D.slow-growing fish outlive fast-growing ones

2.By saying these figures are conservative , Dr. Worm means that .

A.fishing technology has improved rapidly

B.the catch-sizes are actually smaller than recorded

C.the marine biomass has suffered a greater loss

D.the data collected so far are out of date

3.Dr. Myers and other researchers hold that .

A.people should look for a baseline that can't work for a longer time

B.fisheries should keep the yield below 50% of the biomass

C.the ocean biomass should restore its original level

D.people should adjust the fishing baseline to changing situation

高三英语阅读理解困难题查看答案及解析