Have you ever dreamed of visiting a planet in the Milk Way? While the trip sounds exciting, it would take years and years to reach your destination. So in the future, bedtime for astronauts may be more than a few hours of regular shut-eye. They would have to sleep for years.
European researchers are now conducting hibernation experiments. The study may help them understand whether humans could ever sleep through the years it would take for a space flight to distant planets. "If there was an effective technology, it could make deep-space travel a reality," said Mark Ayre of the European Space Agency last month.
What seems like science fiction is not completely unlikely. Researchers have been able to use chemicals to put living cells into a sleep-like state where they don't age. They have now moved on to small, non-hibernating mammals like rats. The results will be out by the end of 2004.
A major challenge is the fact that cells can be very simple systems, whereas body organs are far more complex.
"It's like moving from a simple Apple computer to a supercomputer," said Marco Biggiogera, a hibernation researcher at Italy's University of Pavia.
Just like bears and frogs, the hibernation of human beings would cause a person's metabolism (新陈代谢) to lower so they would need less energy.
Medical research, however, is just half of a space flight hibernation system.
There is the challenge of designing a suitable protective shelter. Such a shelter would provide the proper environment for hibernation, such as the proper temperature. It would also have to monitor (监控) life functions and serve the physiological needs of the hibernator.
According to Ayre, the six-person Human Outer Planets Exploration Mission to Jupiter's moon (木星的卫星) Callisto, could be an opportunity to use human hibernation. The mission aims to send six humans on a five-year flight to Callisto, where they will spend 30 days, in 2045.
9. European researchers are conducting hibernation experiments to ________.
A. ensure astronauts to get a complete sleep B. find the secret of some creatures
C. make preparations for the journey to Jupiter’s moon Callisto
D. know if man can sleep for years
10. The sentence “What seems like science fiction is not completely unlikely” means ______.
A. Science fiction is people’s imagination.
B. Science fiction is imaginative, but it can be realized.
C. Things seem impossible may come true.
D. Things described in science fiction are sure to become true.
11. The passage is implied but doesn’t states that ________.
A. putting living cells into a sleep-like state is full of failure
B. Biggiogera is confident with the experiment
C. human’s hibernation needs no energy
D. medical research is the key to space flight hibernation system
12. By designing a suitable protective shelter, astronauts can ________.
A. have a good hibernation B. lessen the pressure of traveling in space
C. feed themselves in spaceship D. moinitor their body changes
13. What’s the best title for the passage?
A. Six humans to fly to Callisto B. Human hibernation improves health
C. Space travel attracts people D. Deep sleep for deep space travel
Our sense of smell, which we normally take for granted, is nowadays being increasingly used for purposes which might surprise us if we realized them.
One area in which smells are created to achieve particular results is marketing. For some time producers have taken advantage of our sense of smell with regard to household goods.
When pleasant smells are passed through a store’s air conditioning system, people tend to spend more time in the store and buy more. For example, the smell of chocolate is used in sweet stores, while the smell of leather and perfume are used in clothes stores.
In a test, people looked at the same types of shoes in two rooms—one filled with purified air, the other with a smell of mixed flowers. Eighty-four percent of the people preferred the shoes in the room with the smell of flowers. In fact, many said they would have paid up to US $ 10 more for a pair.
Smells also have other uses. Research has shown that certain smells can help to calm anxious people and increase their feeling of safety. Smells such as that of flowers and pine forests might therefore be used to relax patients in doctors’ and dentists’ waiting rooms, and to make the environment more pleasant and less stressful to them.
Some companies are experimenting with different smells to produce different efferent effects on their workers according to the time of day.
For example, early in the morning they might put the smell of lemon in the air conditioning system to wake people up. In the middle of the morning, when the atmosphere tends to become more tense, the smell of wood could be used to calm people down. Before lunchtime the smell of melting butter would encourage people to go to lunch on time. After lunch, when people often begin to lose attention, the smell of mint would increase their watchfulness.
While some of these uses of smells may e helpful and effective, not everyone would agree with their use to control customers in stores. It has been suggested by consumers’ organizations that one way to avoid this new subconscious（无意识）pressure to buy is to go shopping when people are less likely to be influenced by smells.We can conclude from the text that
| A．smells are widely used in different shops | B．different smells can keep people feel happy |
| C．smells are effective if used in suitable cases | D．hospitals take advantages of the sense of smell |
What kind of smell is effective when the students are having a lesson according to the text? Butter. B. Leather C. Wood D. Mint
The 4th paragraph proves that
| A．pleasant smells attract people’s attention to stores |
| B．people prefer the shoes with the smell of different flowers |
| C．right smells increase people’s view of the value of a product |
| D．people want to pay more money because of good smells |
What does the underlined word “them” in paragraph 5 refer to?
| A．patients | B．doctors | C．smells | D．waiting rooms |
Everywhere you will always find “the white—haired boy”, sometimes called “the fair-haired boy” He gets special treatment, as if he were above everybody else. You will find him in school, in college, at home, or where you work.
In school, he is the teacher’s pet, her darling who can do nothing wrong. Sometimes she lets him do little jobs for her. He comes to class in the morning, all shiny and clean, He is always raising his hand, ready with an answer to the teacher’s questions. And he knows all the answers. He “gets into your hair”, especially if you are at the bottom of the class and the teacher thinks you are stupid. How you hate the white-haired boy!
In college, he walks—more often strides—across the school grounds as if he owned them. Sometimes he wears a colorful football or basketball shirt or sweater, with a bright red, or green or yellow college letter proudly worn on the front of it—as a big B, for Bullfinch University. What broad shoulders, what muscles he has! He makes the girls happy by just smiling at them. He has the mark of success on him.
At home, “the fair-haired boy” is mother’s choice, her favorite. Sometimes, he is the oldest son—at times, the youngest. If you are in between, you are out of luck.
On the job, you might meet another of these “white-haired boys”; you cannot escape him. For some strange reason, he is the man who always moves ahead. He gets better and better jobs, with more and more money. But you stand still, wondering why, and trying to explain to your-self why you hate him so much.
Then, you discover that there are others who share your feelings, ready to “let their hair down” —to tell you their private thoughts. One of them asks: “What does he have that I haven’t got?” You ask yourself the same question.
Finally, there comes a day when you decide to stop hating him. Is it perhaps because he has been made boss and you find yourself working for him?From the passage we can know that “the white-haired boy” refers to
| A．a child who is mother’s favorite | B．a student who is hated by everybody |
| C．a pet who is hated by everybody | D．a person who is lucky all the time |
What does the underlined sentence in paragraph 2 mean?
| A．He sets a shining example to you | B．He makes you a little angry. |
| C．He cuts your hair too short. | D．He does up your hair. |
In the author’s opinion, the reason why you finally stop hating the white-haired boy is that
| A．you have no choice but to face the facts | B．you decide to try your best to be better than him |
| C．you have been made boss by him | D．you are beginning to admire him |
Which of the following is the best title for the passage?
| A．Try to Be Attractive | B．Let Your Hair Down |
| C．The White-haired Boy | D．The Top Student |
What’s the purpose of the advertisement?
| A．To introduce some wild animals to visitors. |
| B．To invite visitors to walk in the wildlife park. |
| C．To attract visitors to get close to the sea animals. |
| D．To provide seafood for visitors to feed the sea animals. |
If a parent who is the member of the Aquarium is going to have the Trainer Tour with her child of ten, how much does she have to pay?
| A．$ 175 | B．$ 140 | C．$ 35 | D．$ 31 |
Which of the following is true according to the advertisement?
| A．The programs are changeable. |
| B．There is no danger to a small child. |
| C．You can phone 604—659—FISH to book the programs. |
| D．Bigger groups of visitors are encouraged to save money. |
The food we eat seems to have a great effect on our health. Although science has made big steps in making food more fit to eat, it has, at the same time, made many foods unfit to eat. Some research has shown that perhaps eighty percent of human illness is related to food and forty percent of cancer is related to food as well. That food is related to illness is not a new discovery. In 1945, some researchers realized that things commonly used to keep colour in meats and other food additives（添加剂）caused cancer.
Yet, these additives remain in our food, and it is difficult to know which things on the wrappings（包装）of foods are helpful or harmful. The additives which we eat are not all so direct. Farmers often give penicillin to their animals, and because of this, penicillin has been found in the milk of cows. Sometimes similar tings are supplied to animals not for their health, but just to make a profit.
The farmers are simply trying to fatten the animals in order to get a higher price on the market. Although some countries have tried to control such things, the practice continues.
71. According to this passage, we can know___________. .
A. perhaps most of human illness is caused by what we eat
B. perhaps most kinds of cancer are related to what people eat
C. cancer was discovered in 1945
D. science has made food unfit to eat
72.Things that are used to keep colours in meats are________. .
A. harmful B. useless C. helpless D. dangerous
73. All the additives________. .
A. are bright and colourless
B. are not bright and colourful
C. have indirect effects on our health
D. have direct effects on our health
74. People use additives_________ .
A. to make food more unfit to eat
B. to improve the colour and taste of the food
C. to change colour of the food
D. to take off the diseases of the food
75. Which of the following is not true?
A. Some wrappings of food are harmful.
B. Farmers try to make more money on the market by fattening their animals.
C. “The practice continues” means “things are still going on like that”.
D. We needn’t take care of what we eat..
We already know the fastest, least expensive way to slow climate change: Use less energy. With a little effort, and not much money, most of us could reduce our energy diets by 25 percent or more—doing the Earth a favor while also helping our wallets.
Not long ago, My wife, PJ, and I tried a new diet—not to lose a little weight but to answer an annoying question about climate change. Scientists have reported recently that the world is bending up even faster than predicted only a few years ago, and that the consequences could be severe if we don’t keep reducing emissions（排放）of carbon dioxide（CO2）and other greenhouse gases that are trapping heat in our atmosphere.
We decided to try an experiment. For one month we recorded our personal emissions of CO2. . We wanted to see how much we could cut back, so we went on a strict diet. The average US household（家庭）produces about 150 pounds of CO2 a day by doing common-place things like turning on air-conditioning or driving cars. That’s more than twice the European average and almost five times the global average, mostly because Americans drive more and have bigger houses. But how much should we try to reduce?
For an answer, I checked with Tim Flannery, author of The Weather Makers: How Man Is Changing the Climate and What It Means for Life on Earth. In his book, he had challenged readers to make deep cuts in personal emissions to keep the world from reaching extremely important tipping points, such as the melting（融化）of the ice sheets in Greenland or West Antarctica. “To stay below that point, we need to reduce CO2 emissions by 80 percent,” he said.
Good advice, I thought. I’d opened our bedroom windows to let in the wind. We’d gotten so used to keeping our air-conditioning going around the clock. I’d almost forgotten the windows even opened. We should not let this happen again. It’s time for us to change our habits if necessary.
67. Why did the author and his wife try a new diet?
A. To take special kinds of food B. To respond to climate change.
C. To lose weight D. To improve their health
68. The underlined words “tipping points” most probably refer to________.
A. freezing points B. burning points C. melting points D. boiling points
69. It can be inferred from the passage that_________
A. it is necessary to keep the air-conditioning on all the time
B. it seems possible for every household to cut emissions of CO2
C. the average US household produces about 3,000 pounds of CO2 a month
D. the average European household produces about 1,000 pounds of CO2 a month
70. Which of the following would be the title for this passage?
A. Saving Energy Starts at Home
B. Changing Our Habits Begins at Work
C. Changing Climate Sounds Reasonable
D. Reducing Emission of CO2 proves Difficult
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