Today, we know that the role of vitamins and minerals goes way beyond the prevention of deficiency diseases (维生素缺乏症) to actually preventing cancer and heart disease, the most fearsome killers of our time. With this knowledge has come the widespread call for nutritional supplementation (营养补充) — and a confusing group of vitamin, mineral, and supplements lining the supermarket shelves.
Far from contributing to better health, however, nutritional supplements threaten to turn a scientific breakthrough into a nutritional disaster.
Promoters of vitamins and minerals — especially vitamins A, C, and E— would have consumers believe that the little vitamin pill in the bottle is all they need for good health. Take your vitamins in the morning, and you’re covered. It’s okay to eat fast foods for the rest of the day or skip meals to achieve today’s fashionably skinny look. But vitamins and minerals are only one part of the nutritional puzzle. A diet rich in fiber (纤维) and balanced in carbohydrates and protein is essential for good health. You can’t get these things from a nutritional supplement. The focus on vitamin and mineral supplements may actually be robbing us of the full nutrition we seek.
And no supplement can compare to the quality of nutrition found in natural sources. For example, our bodies turn carotenes (胡萝卜素) from plant foods into vitamin A. Many supplements contain a single carotene, but natural sources are rich in many different carotenes. Many supplements contain a form of vitamin E that is made from chemicals, when natural vitamin E is more readily absorbed and used by the body. And science is still discovering the wealth of nutrients in foods.
You’d be hard-pressed to find a supplement as nutritionally comprehensive and powerful as a balanced diet. Even if you could, you’d pay much more than if you got the same nutritional value from natural sources.
But perhaps the greatest danger presented by nutritional supplements comes from the very real risks presented by self-medication. Anyone can walk into the market and buy as many different supplements as desired. The reported benefits of high dosages of certain nutrients have led some people to believe that the more the better. Many take several vitamin and mineral supplements without regard to possible consequences.
Surprising new research suggests that vitamin C pills may speed up hardening of the arteries, the underlying cause of heart attacks. Researchers said their findings support the recommendations of health organizations, which urge people to avoid high doses of supplements and to get their nutrients from food instead.
As appealing as they’re made to sound, nutritional supplements are danger in disguise. If you’re looking for good health, don’t look on the supplement shelves of your supermarket. Look in the produce section instead.
1.What has given rise to the great need for nutritional supplements?
A. The knowledge of deficiency diseases.
B. The low prices of nutritional supplements.
C. The frighteningly high death rate from cancer and heart disease.
D. The information about the role of vitamins and minerals in health.
2.The “promoters” (Paragraph 3) most probably refers to ________.
A. businessmen B. doctors C. scientists D. fast food lovers
3.According to the passage, nutritional supplements ________.
A. are made from chemicals
B. are ineffective in supplying fiber
C. provide too much vitamin C
D. contain a kind of dangerous carotene
4.By describing nutritional supplements as “danger in disguise” in the last paragraph, the writer means that they are ________.
A. of little help
B. of poor quality
C. potentially harmful
D. extremely poisonous
高二英语阅读理解中等难度题
Today, we know that the role of vitamins and minerals goes way beyond the prevention of deficiency diseases (维生素缺乏症) to actually preventing cancer and heart disease, the most fearsome killers of our time. With this knowledge has come the widespread call for nutritional supplementation (营养补充) — and a confusing group of vitamin, mineral, and supplements lining the supermarket shelves.
Far from contributing to better health, however, nutritional supplements threaten to turn a scientific breakthrough into a nutritional disaster.
Promoters of vitamins and minerals — especially vitamins A, C, and E— would have consumers believe that the little vitamin pill in the bottle is all they need for good health. Take your vitamins in the morning, and you’re covered. It’s okay to eat fast foods for the rest of the day or skip meals to achieve today’s fashionably skinny look. But vitamins and minerals are only one part of the nutritional puzzle. A diet rich in fiber (纤维) and balanced in carbohydrates and protein is essential for good health. You can’t get these things from a nutritional supplement. The focus on vitamin and mineral supplements may actually be robbing us of the full nutrition we seek.
And no supplement can compare to the quality of nutrition found in natural sources. For example, our bodies turn carotenes (胡萝卜素) from plant foods into vitamin A. Many supplements contain a single carotene, but natural sources are rich in many different carotenes. Many supplements contain a form of vitamin E that is made from chemicals, when natural vitamin E is more readily absorbed and used by the body. And science is still discovering the wealth of nutrients in foods.
You’d be hard-pressed to find a supplement as nutritionally comprehensive and powerful as a balanced diet. Even if you could, you’d pay much more than if you got the same nutritional value from natural sources.
But perhaps the greatest danger presented by nutritional supplements comes from the very real risks presented by self-medication. Anyone can walk into the market and buy as many different supplements as desired. The reported benefits of high dosages of certain nutrients have led some people to believe that the more the better. Many take several vitamin and mineral supplements without regard to possible consequences.
Surprising new research suggests that vitamin C pills may speed up hardening of the arteries, the underlying cause of heart attacks. Researchers said their findings support the recommendations of health organizations, which urge people to avoid high doses of supplements and to get their nutrients from food instead.
As appealing as they’re made to sound, nutritional supplements are danger in disguise. If you’re looking for good health, don’t look on the supplement shelves of your supermarket. Look in the produce section instead.
1.What has given rise to the great need for nutritional supplements?
A. The knowledge of deficiency diseases.
B. The low prices of nutritional supplements.
C. The frighteningly high death rate from cancer and heart disease.
D. The information about the role of vitamins and minerals in health.
2.The “promoters” (Paragraph 3) most probably refers to ________.
A. businessmen B. doctors C. scientists D. fast food lovers
3.According to the passage, nutritional supplements ________.
A. are made from chemicals
B. are ineffective in supplying fiber
C. provide too much vitamin C
D. contain a kind of dangerous carotene
4.By describing nutritional supplements as “danger in disguise” in the last paragraph, the writer means that they are ________.
A. of little help
B. of poor quality
C. potentially harmful
D. extremely poisonous
高二英语阅读理解中等难度题查看答案及解析
Now, we know that if we do not get enough vitamins, we are at risk of developing a number of diseases. As a result, vitamin supplements（补品），though expensive, are popular with people who worry that they are not getting enough vitamins from the foods they eat. But contrary to what many people think, medical experts have found little evidence that most supplements do anything to improve health or protect against disease.
In fact, medical experts warn that taking too many of some vitamins can be harmful. For example, too much vitamin E can cause bleeding. People should discuss what vitamins they take with their doctors, as some vitamins can produce harmful side effects when mixed with medicines.
Experts, however, say that sometimes vitamins can help prevent disease. People who know they lack a particular vitamin should take vitamin supplements. Some older adults, for example, may not have enough vitamin B-twelve. This is because, as people get older, their body loses its ability to take it from foods. Also, people who spend much time inside may need some extra vitamin D as the skin makes this vitamin from sunlight.
Different vitamins are found in different foods. Vitamin A is found in fish liver oil. It also is in the yellow part of eggs. Sweet potatoes, carrots and other darkly colored fruits and vegetables contain substances that the body can change into vitamin A. Vitamin B-twelve is found in green leafy vegetables and other foods, like fruits. Vitamin K can be found in pork products.
In fact, for most people, a balanced diet can ensure enough of the vitamins our bodies need. So, it is important for us to eat a mixture of foods every day to ensure that we get enough vitamins our bodies need.
1.What is probably talked about before this passage?
A. How many vitamins a person’s body needs.
B. How many vitamins some foods contain.
C. The benefits that vitamins bring to our health.
D. What people should do to stay healthy.
2.Vitamin supplements are popular with people because ________.
A. people mistakenly think that they are good for their health
B. they contain more vitamins than the foods people eat
C. food does not provide enough vitamins people need
D. people fear that a lack of vitamins will lead to disease
3.From the passage, we can learn that medical experts advise people _________.
A. never to take any vitamin supplements
B. to depend only on food for their vitamins
C. not to take any vitamins together with medicines
D. to consult doctors before taking vitamin supplements
4.For people who lack Vitamin B-twelve, they can eat more from _______.
A. sweet potatoes B. green leafy vegetables
C. pork products D. eggs
高二英语阅读理解中等难度题查看答案及解析
Now, we know that if we do not get enough vitamins, we are at risk of developing a number of diseases. As a result, vitamin supplements（补品），though expensive, are popular with people who worry that they are not getting enough vitamins from the foods they eat. But contrary to what many people think, medical experts have found little evidence that most supplements do anything to improve health or protect against disease.
In fact, medical experts warn that taking too many of some vitamins can be harmful. For example, too much vitamin E can cause bleeding. People should discuss what vitamins they take with their doctors, as some vitamins can produce harmful side effects when mixed with medicines.
Experts, however, do say that sometimes vitamins can help prevent disease. People who know they lack a particular vitamin should take vitamin supplements. Some older adults, for example, may not have enough vitamin B-twelve. This is because, as people get older, their body loses its ability to take it from foods. Also, people who spend much time inside may need some extra vitamin D as the skin makes this vitamin from sunlight.
Different vitamins are found in different foods. Vitamin A is found in fish liver oil. It also is in the yellow part of eggs. Sweet potatoes, carrots and other darkly colored fruits and vegetables contain substances that the body can change into vitamin A. Vitamin B-twelve is found in green leafy vegetables and other foods, like fruits. Vitamin K can be found in pork products.
In fact, for most people, a balanced diet can ensure enough of the vitamins our bodies need. So, it is important for us to eat a mixture of foods every day to ensure that we get enough vitamins our bodies need.
1.Vitamin supplements are popular with people because ________.
| A．people mistakenly think that they are good for their health |
| B．they contain more vitamins than the foods people eat |
| C．food does not provide enough vitamins people need |
| D．people fear that a lack of vitamins will lead to disease |
2.From the passage, we can learn that medical experts advise people _________.
| A．never to take any vitamin supplements |
| B．to depend only on food for their vitamins |
| C．not to take any vitamins together with medicines |
| D．to consult doctors before taking vitamin supplements |
3.For people who lack Vitamin B-twelve, they can eat more from _______.
A. sweet potatoes B. pork products C. green leafy vegetables D. eggs
42. What would be the best title of the passage?
A. Getting enough vitamins through a balanced diet.
B. Vitamin supplements do harm to our health.
C. Vitamins are important to our health.
D. Lacking vitamins can cause many diseases.
高二英语阅读理解困难题查看答案及解析
Imagination and fantasy can play an important role in achieving the things we fear. Children know this very well. Fred Epstein, in his book I Make It to Five, tells a story he heard from one of his friends about Tom, a four-year-old boy with a cancer in his back bone. He came through several operations and a lot of pain by mastering his imagination.
Tom loved to pretend, and he particularly loved to play superheroes. Dr. Epstein explained that it was actually a brilliant way for his young mind to handle the terrifying and painful life he led.
The day before his third trip to the operating room, Tom was terribly afraid. “Maybe I could go as Superman,” he whispered to his mom. Hearing this, the mother hesitated for a while. She has avoided buying the expensive costume(戏装), but finally she agreed.
The next day Tom appeared as the powerful Superman, showing off through the hospital halls and coolly waving his hand to the people greeting him along the way. And Tom, with the strength of his fantasy, successfully made it through the operation.
The power of imagination need not be reserved for children only. We all have the power to use our fantasies to attempt things we never thought possible, to go through those things that seem impossible, and to achieve what we never believed we could. Just as Dr. Epstein puts it, “If you can dream it, you can do it.”
It doesn’t mean that you should dress as a superhero for your next job interview. But, next time you are tested in a way that seems impossible, imagine what it would take to overcome it. Become the person you need to become to win over your challenge and do it in your mind first. So, let your imagination run wild, and dare to dream.
1.What do we know about Tom?
A. He was seriously ill.
B. He was a dishonest boy.
C. He was crazy about magic.
D. He was Dr. Epstein’s patient.
2.What can be inferred about Tom’s mother?
A. She was a rich lady.
B. She refused Tom’s request.
C. She wanted Tom to be a superhero.
D. She wanted to get Tom through the pain.
3.When Tom went for the third operation, he_________.
A. pretended to be painful B. acted like a superhero
C. appeared in poor spirits D. argued with his mother
4.In the last paragraph, you are advised________.
A. to go through some difficult tests
B. to wake up from your wild dreams
C. to become a powerful person in your mind
D. to wear expensive clothes for job interviews
高二英语阅读理解中等难度题查看答案及解析
The origins of the apple tree are in Asia. We know that 8,500 years ago apples were being grown and eaten in ancient Jericho, a city near the Jordan River. In some parts of the ancient world apples could only be afforded by royalty (王室成员) and their courts, and were a popular dessert as long ago as 4,500 years. Now the apple is the most popular fruit in the world.
You probably know that there’s a tradition for students to bring shiny apples to their favorite teachers. But why?
No one knows for sure. The idea of "an apple for the teacher" has been with us since the late 1800s. Perhaps the custom grew out of the fact that apples are ripe (成熟的) in September, when the school year usually begins. In earlier times, students, particularly those in rural areas, could pick apples from trees on their way to school. They were easy gifts for children to give.
However, the lovely practice took on a dark note if the other children thought the gift-giver was trying to buy the teacher into giving him or her better grades. "Apple polisher" came to mean someone who tries to please a superior (上级) in return for special treatment. It was a popular college slang (俚语) term in the 1920s, but the term isn’t used much any more.
It’s true that apples can be very attractive. The apple is America’s favorite fruit, as shown in the phrase, "as American as Mom and apple pie".
After all, who ever says, "A banana a day keeps the doctor away" or "You’re the banana of my eye"? And who brings a banana to his or her teacher? Nobody.
1.What do we learn about the apple from the passage?
A. It has been popular worldwide since 8,500 years ago.
B. It has been a popular dessert for about 4,500 years.
C. The origins of the apple tree are in America.
D. Everyone could enjoy this fruit in the ancient world.
2.Why did students give their teachers apples?
A. Apples were ripe when the school year began.
B. Apples were the most popular fruit.
C Apples were expensive enough as gifts.
D. Teachers liked to get apples from students.
3.Which of the following is TRUE about the phrase "apple polisher"?
A. It is used to praise someone for his / her performance.
B. It is still as popular nowadays as before.
C. It may mean something good or bad, depending on the situation.
D. It refers to someone who wants to please a leader.
4.What do we learn from the last two paragraphs?
A. Apples are related to mothers in America.
B .Apple is a popular word, and used in many phrases.
C. Apples are attractive because of many stories.
D. Nobody wants to use the word banana.
高二英语阅读理解中等难度题查看答案及解析
What kind of car will we be driving in 2010? Rather different from the type we know today, with the next 20 years bringing greater change than the past 50．The people who will be designing the models of tomorrow believe that environmental problems may well accelerate the pace of the car’s development. Today they are students on the transport design course at London’s Royal College of Art.
Their vision is of a machine with three wheels instead of four, electrically powered, environmentally clean, and able to drive itself along “intelligent” roads equipped with built-in power supplies. Future cars will pick up their fuel during long journeys from a power source built into the road, or store it in small quantities for travelling in the city.
Instead of today’s seating arrangements—two in front, two or three behind, all facing forward--- the 2010 car will have a versatile interior with adults and children in a family circle.
This view of the future car is based on a much more sophisticated road system, with strips built into motorways to supply power to vehicles passing along them, cars will not need drivers, because computers will provide safe driving control and route finding. All the driver will have to do is say where to go and the computer will do the rest. It will become impossible for cars to crash into one another. The technology already exists for the car to become a true automobile.
71．What kind of car will we be driving in 2010?
A．Three wheeled. B．Electrically powered.
C．With a versatile seating arrangement D．All of the above.
72．How long will a volunteer be required to spend?
A．A few hours every day. B．A couple of hours each day.
C．One or two hours every two weeks. D．A few days per week.
73．What does the word “versatile” in Paragraph 3 mean?
A．having many different kinds of skill
B．easily able to change from one direction to another
C．easily able to change from one kind of activity to another
D．having many different uses
74．In paragraph 4 “with strips built into motorways to supply power to vehicles passing along them” means “there are many ____”.
A．traffic lights to control the speed of future cars
B．street posts to indicate directions for drivers
C．power sources along the street are able to supply power to automobiles
D．stop marks along the street to stop cars
75．What is the main idea of the passage?
A．Future cars are completely different from the automobiles we know today.
B．The design of future cars will be more sophisticated.
C．Because of the new type of cars, our future environment will become cleaner.
D．The road system will become more sophisticated than it is today.
高二英语阅读理解简单题查看答案及解析
It is rather that we still do not know how many species there are in the world today.
A.misleading B.embarrassing
C.boring D.demanding
高二英语单项填空中等难度题查看答案及解析
It is rather ______ that we still do not know how many species there are in the world today.
A．misleading B．embarrassing C．boring D．demanding
高二英语单项填空中等难度题查看答案及解析
_______to know the result of rescue, the relatives of the miners gathered at the door of the boss.
| A．Interested | B．Curious | C．Dying | D．Attracted |
高二英语单项填空简单题查看答案及解析
________to know the result of rescue, the relatives of the miners gathered at the door of the boss.
A. Interested B. Curious C. Dying D. Attracted
高二英语单项填空中等难度题查看答案及解析