Alaskan black bears hibernate for up to seven months a year, during which time they do not eat or drink, before waking up in virtually the same physical state they fell asleep in． Now experts hope to 题目和参考答案——青夏教育精英家教网——

题目内容

Alaskan black bears hibernate for up to seven months a year, during which time they do not eat or drink, before waking up in virtually the same physical state they fell asleep in．
Now experts hope to develop methods of putting humans into a similar state which could help astronauts survive long missions and lead to new ways of treating severely ill patients．
While many studies have examined hibernation in mice and hedgehogs, little research has been done into the same condition in larger mammals such as bears．
But new research conducted at the Institute of Arctic Biology at the University of Alaska monitored the animals' body temperature, heart rate and muscle movements while they slept.
The research results showed that during a five-month hibernation the bears’ body temeratures varied between 30℃ and 36℃ in cycles that lasted between two and seven days—a pattern that was previously unknown in hibernating animals.
The research project leader said, "If our research could help by showing how to reduce metabolic(新陈代谢的) rates and oxygen demands in human tissues, one could possibly save severely ill patients. We simply need to know how to turn things on and off to take advantage of the different levels of hibernation."
Craig Heller, of Stanford University, who contributed to the study, added: "There has always been a thought that, if there is ever long-distance space travel, it would be good to be able to put people into a state of lower metabolism or a state of hibernation. That's almost science fiction but you can see the logical basis."
小题1:We know from the text that .

A．during winter Alaskan black bears sleep for more than half a yea

r

B．researchers have examined hibernation in humans

C．experts have got no results from their research

D．Craig Heller is a leader from the Institute of Arctic Biology

小题2:The best topic of the text should be ．
．

A．The Latest Research Results

B．New Methods of Putting Humans into Hibernation

C．Alaskan Black Bears Hibernate

D．Astronauts Could Hibernate Like Bears

小题3:According to the text, we can infer that .

A．many studies have examined hibernation in mice and bears as well

B．humans' body temperatures vary between 30℃ and 36℃ while they sleep

C．research into hibernation in animals may help deadly patients stay longer

D．scientists have already take advantage of the different levels of hibernation in space missions

小题1:A小题1:D小题1:C

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相关题目

完形填空（共20小题；每小题1.5分，满分30分）
阅读下面短文，掌握其大意，然后从下面各题所给的四个选项（A，B，C和D）中，选出最佳选项。
The party began shortly after Mr. Wood, who lived in the flat below, sighed to himself as he heard excited voices and the noisy music. Luckily he had 36 some work home from the office, 37 he kept himself busy for a couple of hours, thus managing to pay no attention to the noise 38. But by eleven o’clock he felt 39 and was ready to go to bed, though from his earlier experience he knew it was 40 trying to get to sleep. He undressed and lay for a while on the bed, trying to read, but he 41 himself reading the same page over and over again. He then turned off the light and 42 his head in the pillow. But 43 he could not shut 44 the noise, finally, after 45 seemed hours, his 46 was gone.
He jumped out of bed, 47 some clothing, marched 48 up the stairs, and walked into his neighbor’s flat. The owner of the flat, who 49 him in his dressing gown, came 50 the room and,51 Mr. Wood could say anything, cried, “My dear fellow, come and 52. I know our parties 53 you. I meant to send you 54” Mr. Wood’s anger disappeared then and there. He said, “I’d better go and get 55 . Minutes later, he returned, properly dressed, only to find that the party was nearly over.

B．worse still

C．strange enough

A．made fun of

C．was angry with

D．caught sight of

A．should bother

B．would bother

C．need bother

D．shall bother

C．an invitation

Scientists have long understood the key role that oceans play in controlling the Earth’s climate. Oceans cover 70 per cent of the surface of the globe and store a thousand times more heat than the atmosphere does. What’s newer is the understanding of how this key component(组成部分) of our climate system responds to global warming.
A brake on global warming—for now
One of the oceans’ most important climate functions is absorbing heat and carbon dioxide(CO2), one of the gases that causes global warming. Acting as something absorbing heat, the oceans have absorbed huge amounts of heat and CO2 in the last forty years.
Fujita explains, “the oceans are saving us from faster climate change—they are putting a brake on the climate system.”
“That’s the good news,” he adds. “The bad news is that the oceans only slow the atmospheric warming. Once the oceans come to balance with a greenhouse-gas warmed earth, the extreme heat will remain in the atmosphere and things will get much hotter.” But where and how the oceans release this slowly increased heat is uncertain. And as the ocean stores heat, fragile(脆弱的) underwater ecosystems are struggling.
The most recent scientific report from the Intergovernmental Panel on Climate Change(IPCC) also notes with concern that the ocean is acidifying(酸化) because of increased absorption of atmospheric CO2. and thus causing a threat to shell-forming species. Sharp increase in CO2 levels will cause further acidification of the ocean.
Currents distributing heat
Another important role the oceans play is that of distributor(散布者). Oceans deliver heat and life-sustaining nutrition around the globe. Just as blood tube bring oxygen and nutrition to cells in the human body, the ocean’s currents carry oxygen, nutrients and heat throughout the Earth. The ocean distributes 25 to 50 per cent of energy the planet receives from the sun. For example, the Gulf Stream carries heat across the Atlantic. This warm current gives northwestern European a milder climate that it would normally have so far north. A change to the ocean’s circulation patterns could throw Europe into a colder period, even as the rest of the world is experiencing warmer temperatures.
小题1: We can infer from the passage that _______.

A．the oceans cause global warming	B．the oceans stop global warming
C．the oceans release nutrients and heat	D．the ocean ecosystems face more dangers

小题2: From the passage we can learn that ocean’s currents _______.

produce oxygen and nutrients around
absorb 25-50% of the energy from the sun
distribute the atmosphere hotter

D. change the ocean’s circulation patterns
小题3: Which of the following are the results of the ocean absorbing heat and CO2?
a. It causes further acidification.
b. It makes the atmosphere hotter.
c. It balances the oceans with a green-house gas.
d. It affects shell-forming species.
e. It makes the oceans act as a heat sponge.
f. It controls the Earth’s climate.

小题4: If the ocean’s circulation pattern changed, ______.

A．Asia would suffer a hotter climate.

B．Europe would become hotter

C．the rest of the world would become warmer.

D．the climate of Europe would become colder.

Sublet.com is not just for sublets (转租，分租) and

subleases（转租入，转租出）! If you are searching for a place to live or just need temporary rental housing, you will find the rental you need at Sublet.com. Sublet.com is a full service rental website where landlords(房东), tenants(房客) and roommates come together to rent apartments, houses and rooms.
At sublet.com tenants can search and find every type of rental housing. Sublet.com landlords rent and sublet apartments, houses, townhouses, rooms, hotels, Bed and Breakfasts, mobile homes, vacation rentals and dormitory rooms.

Sublet.com rentals and sublets meet every demand: pet friendly rentals and subleases, furnished or unfurnished rentals, short term or long term rentals, roommates, rentals and sublets for tenants with bad credit and obviously rentals for tenants with good credit. At Sublet.com tenants can search for rentals in many different ways. Search rentals by location neighborhood, by zip code(区号), by specific rental needs like doorman, pets, high speed internet, no smokers and more.
If you are a landlord and you have an apartment, house, townhouse or room to rent, post it for free at Sublet.com. Post your apartment or house for a 1 year lease, for a one week rental or even for a 1 day rental. Whatever your rental goals are, sublet.com will help by sending quality rental leads(线索). Sublet.com also offers landlords a complete tenant screening service. At Sublet.com you can conveniently run credit reports, employment reports, criminal background checks to evaluate the quality of a tenant..
Sublet.com does not share personal information. Even email addresses are not accessible to landlords or tenants. Sublet.com does not save credit card information. Sublet.com posts a TRUSTED logo(专用标识) for landlords that have been screened and checked. And tenant reviews of landlords are posted with each listing to express the quality of a rental or a landlord. Since all landlords with tenant complaints are blocked, the length of time a landlord has been posting is shown to indicate the quality of the landlord.
小题1:At Sublet.com, _________.

A．tenants with bad credit can not find their rentals

B．tenants can not find the rentals which provide Bed and

C．landlords can post a flat or a room to rent without paying any money

D．landlords and tenants are informed of each other’s email addresses

小题2:This passage is probably_________.

A．an ad for a housing rental website	B．a guide for people to rent houses
C．a direction of making rental deals	D．a collection of rental information

小题3:People can do all the following at Sublet.com EXCEPT_________.

A．buy a well-furnished apartment

B．find a place to stay with their pets

C．evaluate the quality of a tenant

D．post their apartment or house for a short term or long term rental

小题4:The purpose of the last paragraph is probably to_________.

B．prove that sublet.com is the best

C．refuse people with bad credit

D．convince landlords and tenants of their privacy and security

Most of the news in the newspapers is bad but sometimes there is a story with good news. This is one of those stories. Millions of people around the world suffer from AIDS, malaria, tuberculosis, and other serious diseases. There are medicines to treat these diseases but for people in poor countries, these medicines are too expensive to buy. When a pharmaceutical（制药的）company produces a new medicine, they receive a special license called a patent. This license means that the new medicine or drug is protected for a period of 20 years. The company that produced the drug can fix the price of the drug and no other company is allowed to produce the same drug or a copy of the drug for 20 years. At the moment, these patents operate all over the world, both in rich countries and in poor countries. The drugs companies say that they need patents so that they can get the money to pay for research to find new drugs and medicines. In rich countries people usually have enough money to pay for these drugs but in poor countries people can’t afford to buy them and cannot treat diseases like AIDS and malaria.
Last month, however, a group of experts published a report which says that patents are very bad for poor countries. The report says that drug companies do not want to find new medicines for diseases of poor people in poor countries. It says that poor countries should be allowed to buy cheap drugs without patents from other countries.
The authors of the report were lawyers, scientists and a senior director from the drug company Pfizer. Of course, the pharmaceuticals industry doesn’t agree with the report, “We need patents so that we can develop new medicines to fight disease both in the developed and developing world,” said a spokesman. But the report is the first sign that there might be a change in the patent system. This change could save millions of lives in the world’s poorest countries. This really is good news.
小题1: Why are medicines expensive for people in poor countries?

A．They are protected by patents.	B．They are produced in rich countries.
C．They are imported.	D．They can cure the deadly diseases.

小题2: What does the underlined word “patent” in Para1 mean in Chinese?

小题3:Why do drugs companies need patents?

A．To sell drugs in rich countries.

B．To sell drugs in poor countries.

C．To get money to produce new drugs.

D．To compete with other companies.

小题4: What does the report say?

A．Poor countries should spend more money on drugs.

B．Poor countries shouldn’t obey a pharmaceutical patent.

C．Poor countries should import drugs.

D．Poor countries should be allowed to make copies of drugs.

小题5:What might happen if the patent system is changed?

A．Millions of lives will be saved in poor countries.

B．Drugs companies will stop producing drugs.

C．Drug companies will make more money.

D．The competition will be canceled.

When it comes to eating out, we can't help thinking of big meals in the restaurants, which usually contain much more fat and less fibers. Whether it is a business meeting over lunch or a fast food meal with the kids, eating out is a part of our lives. We eat out to save a lot of time, like grabbing a bite at fast food restaurants, or we take dining out as a favorite way to relax and socialize with friends.
Eating out can be fun but many people still like eating at home more because it is healthier. When my dear wife does not prepare foods for me, I would rather cook some instant noodles and eat at home! However, we go out to eat once in a while for holidays or on special occasions.
More and more people want to make healthy food choices nowadays. Some are watching calories, while others want to keep their cholesterol(胆固醇)under control or eat less fat. Plan ahead and choose wisely, you will find foods that fit into your meal plan and make eating out both healthy and enjoyable.
Here are some pointers to remember that can help you make wise choices when eating out: go for balance, watch portion sizes and drink water or low-fat milk. Keep the ground rules of good nutrition in mind. Eat a variety of foods in moderate(适中的)amounts, limit the amount of fat you eat, and watch the amount of salt in food. If you develop the skills to make healthy choices now, your body will thank you later.
Eating out can be one of life's great pleasures. Make the right choices, ask for what you need, and balance your meals out with healthy meals at home. You can enjoy yourself and take good care of yourself at the same time.
小题1: From the passage, we can infer that often eating out______________ .

A．contributes to healthy bodies	B．maintains good relations with friends
C．is of disadvantage to health	D．saves time from cooking

小题2: On the author's wedding anniversary, _______________________.

A．he prefers to cook some instant noodles for his wife

B．he would like to have a party at home

C．he must make an important choice

D．he is likely to take his wife to eat out

小题3: The third paragraph doesn't say but implies that________________.

A．people's awareness of health has improved

B．most people are worried about their cholesterol

C．calories have caused people's attention

D．it is important to choose your food every day

小题4:If you had been watching for your diet, _____________________ .

A．you wouldn't have suffered any disease

B．you would be in good health now

C．you might have had much experience in life

D．you could have cured your illnesses

There is a boy called Bill in my gym class who has unbearably yellow teeth that almost make everyone feel unpleasant．Recently another boy told Bill that he should "go Ajax" his teeth．Bill was crushed．If the other boy had been thinking, he would have realized that there is a better way to handle such a situation．He could have dealt with it with tact．He could have showed this hurtful truth in a more careful, sensitive way—that's "tact"．
If a person isn't sensitive to another's feelings, there is no way he or she can be tactful．Yesterday, my 5-year-old brother proudly announced that he had cleaned the screen on our television set．Unfortunately, he used furniture polish, which produced an oily film on the television screen．My mother smiled arid thanked him for his efforts—and then showed how to clean the screen properly．Her sensitivity enables my brother to keep his self-respect．Yet, sensitivity alone does not make tact．
"Tactfulness" also requires "truthfulness"．Doctors, for example must be truthful．If a patient has just been disabled in an accident, a tactful doctor will tell the truth—but express it with sensi

tivity．The doctor may try to give the patient hope by telling them curing techniques under study or about advanced equipment now available．Doctors must use tact with patients' relatives as well．Instead of bluntly saying, "Your husband is disabled," a doctor might say, "I'm sorry, but your husband has lost feeling in his legs and．．．"
Tact should not be confused with trickery．Trickery occurs when a nurse is about to give a patient an injection（注射） and says, "This won't hurt a bit．" Instead of trickery, the nurse might guarantee the patient that the discomfort of the injection is a small thing compared to the benefits of it．It would also be thoughtful for the nurse to tell the patients about some of these benefits．
Tact is a wonderful skill to have, and tactful people are usually admired and respected．Without tact our society would become an intolerable place to live in．
小题1:The underlined word "crushed" in the first paragraph probably means____．

小题2:According to the author, his mother's praise for the brother is ____．

A．sensitive and tactful	B．sensitive but not tactful enough
C．truthful but not tactful enough	D．sensitive but trickish

小题3:Which of the following shows the structure of the passage?
（The numbers stand for the paragraphs）

Butter is bad for you—so is margarine（人造黄油）．Coffee raises blood pressure, but may protect against cancer．Alcohol is okay, but only if it's wine．The confusing studies on what is safe to eat and drink are enough to make it impossible for anyone to understand what "good food" is．
Take the margarine-butter debate for example．Studies that linked fat—found mostly in animal products such as meat and butter—with cancer and heart disease sent millions rushing to buy margarine．But then another study found that people who ate a lot of margarine also had high levels of heart disease．For those who have a firm faith in science, this seems to be the end of the world．
But many doctors point out that their advice has never been conflicting．For years, and in various countries, they have recommended eating less fat．
People in western countries such as Britain and the United States get about 40 percent of their calories from fat．Doctors say this should be around 30 or even 25 percent,
"We must try to reduce total fat," said Dr．Robert Richardson of the University of Edinburgh, who has been studying the effects of fat on human health for years．
"We need to go to more such food as bread, in particular brown bread, and more fruit and vegetables．"
Fresh produce may not be so safe, either．Last month the British Government advised consumers to peel their pears before eating, while many Americans briefly avoided apples because of fears over an insect killing chemical．
But Dr．Arnold, a British scientist, said any risk of such poisoning would be outweighed by the costs of not eating plant foods．
"On balance, if you were to put both risks against each other, the advice has to be eating as much fruit and vegetable daily as possible," she said．
In general, doctors conclude, variety truly is the best policy．"The general advice is pretty much the same advice that doctors have been talking about for a long time—a varied diet, a mixture of foods and not too much of any one," Arnold said．
小题1:In which section of the magazine are you most likely to find this passage?

A．Arts and Culture	B．Entertainment
C．Nature	D．Health

小题2:The British Government advised consumers to peel their pears before eating because ________．

A．it found that there were insects on the pears

B．it wanted consumers to avoid insect, killing chemicals

C．the skin of pears was found to be bad for people's health

D．it was a bad habit not to peel them

小题3:The underlined word "outweigh" （Para. 8） means " __________．"

A．to be heavier than usual or allowed	B．to be more dangerous than
C．to be greater in value or importance than	D．to be considered less important than

小题4:What can we infer from the passage?

A．Many doctors say that their advice has never been conflicting．

B．Science provides answers to all our questions．

C．We should peel our pears before eating．

D．We should eat plant foods despite the risk of poisoning．

Holidays
Holiday News
Vacations(空位) now and in the school holidays at a country hotel in Devon. This comfortable, friendly home-from-home lies near the beautiful quiet countryside, but just a drive away from the sea. The food is simple but good. Children and pets are welcome. Reduced prices for low season.
The Snowdonia Centre
The Snowdonia Centre for young mountain climbers has a mountain climbing lesson. The beginners’ costs are 57 for a week, including food and rooms. Equipment is included except walking shoes, which can be hired at a low cost.
You must be in good health and prepared to go through a period of body exercises. This could be the beginning of a lifetime of mountain climbing adventure.
The world Sea Trip of a Lifetime
Our World Sea Trip of 2008 will be unlike any holiday you have ever been on before. Instead of one hotel after another, with all its packing and unpacking, waiting and travelling, you just go to bed in one country and wake up in another.
On board the ship, you will be well taken care of . Every meal will be first-class and every cabin like your home.
During the trip, you can rest on deck(甲板)，enjoy yourself in the games rooms and in the evening dance to our musical team and watch our wonderful play.
You will visit all the places most people only dream about---from Acapulco and Hawaii to Tokyo and Hong Kong.
For a few thousand, all you’ve ever hoped for can be yours.
小题1:What can you do if you like to go on holidays with pets?

A．Choose the holiday in Devon.	B．Go to the Snowdonia Centre.
C．Join the World Sea Trip of 2008.	D．Visit Acapulco and Hawaii.

小题2:In what way is the Snowdonia Centre different from the other two holidays?

A．It provides chances of family gatherings.

B．It provides customers with good food.

C．It offers a sports lesson.

D．It offers comfortable rooms.

小题3:What is special about the World Sea Trip of 2008?

A．You can have free meals on deck every day.

B．You can sleep on a ship and tour many places.

C．You will have chances to watch and act i

D．You have to do your own packing and unpacking.