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Like distance runners on a measured course, all of us will move through time in a roughly predictable pattern.
In the first stage of our lives, we develop and grow, reaching toward the top of physical vitality (活力,生氣).
After we grow up, however, the body begins a process of gradually wearing out.
A new awareness of physical fitness may help lengthen our years of health and vitality, yet nothing we do will work to stop the unavoidable force of aging.
Most of the changes of aging take place deep inside the body. The lungs become less able to take in oxygen. Powerful muscles gradually lose their strength. The heart loses power and pumps less blood. Bones grow easier to break.
Finally, we meet a stress, a stress that is greater than our physical resistance. Often, it is only a minor accident or chance infection (a disease caused by virus), but this time, it brings life to an end.
In 1932, a classic experiment nearly doubled the lifetime of rats, simply by cutting back the calories in their diet. The reason for the effect was then unknown.
Today, at the University of California at Berkley, Dr. Paul Seagle has also greatly lengthened the normal lifetime of rats. The result was achieved through a special protein limited diet, which had a great effect on the chemistry of the brain. Seagle showed that within the brain, specific chemicals control many of the signals that influence aging. By changing that chemical balance, the clock of aging can be reset.
For the first time, the mystery of why we age is being seriously challenged. Scientists in many fields are now making striking and far-reaching discoveries.
An average lifetime lasts 75 years, yet in each of us lies a potential for a longer life. If we could keep the vitality and resistance to disease that we have at age twenty, we would live for 800 years.
小題1: What does the underlined word “it” refer to?
A．Physical vitality.B．Stress. C．Aging.D．Physical resistance.
小題2:Which of the following is not a change of aging?
A．The lungs become unable to take in oxygen.
B．People gradually lose their muscle strength.
C．The heart loses power and pumps less blood.
D．Bones tend to break more easily.
小題3: The author believes the following except that ________.
A．human’s life pattern is predictable
B．physical fitness can’t stop the force of aging
C．human’s lifetime will last longer than 75 years
D．all of the changes of aging take place deep inside the body
小題4:How did Dr. Paul Seagle lengthen the lifetime of rats in his experiment?
A．By limiting the protein in their diet.B．By cutting the calories in their diet.
C．By resetting their clock of aging.D．By keeping their physical fitness.
小題5: What is probably the best title for the article?
A．Two Great ExperimentsB．The Mystery of Human Life
C．Ways to lengthen Human LifeD．The Breakthrough in the Study of Aging

小題1:B           
小題1:A
小題1:D
小題1:A
小題1:D
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科目：高中英語 來源：不詳 題型：完形填空


A.    introduction  B. company  C. accidentally   D. against    AB. sped 
AC. apparent    AD. between  BC. institutional  BD. context  CD. influenced
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科目：高中英語 來源：不詳 題型：閱讀理解

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A．beneficial, because their inventors are famous
B．beneficial, though their inventors are less famous
C．not useful, because their inventors are less famous
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B．inform students of the windshield wiper’s invention
C．carry out the requirements by Mountain University
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A
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Our Price: $ 8.95
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C．Ochoa is the first Hispanic woman to have gone aboard the space shuttle Discovery for the ride.
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科目：高中英語 來源：不詳 題型：閱讀理解

Grandparents might be known for spoiling grandchildren, but a new study says they might also be helping the kids improve their social skills and behavior.
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小題1:It is generally believed that a grandmother __________ .
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B．can help kids develop social skills
C．can spoil a child
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A．from two biological parent families
B．from a single—parent household
C．from a divorced household
D．from a stepfamily household
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B．still get along well with his peers
C．be easier to be spoiled than his peers
D．not be popular with peers
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B．American parents are much busier than those from other countries
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D．American kids like to share more living space with their grandparents
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A．children who live solely with their grandparents may benefit the most
B．grandparents are a source of comfort to children from families undergoing difficulties
C．grandparents play a more positive role than parents in children’s growth
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科目：高中英語 來源：不詳 題型：閱讀理解

What do you know about the sea? You may have seen it. Some of us have swum or bathed in it. It looks beautiful on a fine sunny day and it can be very rough when there is a strong wind. What other things do we know about it? Of course, the sea is very large. In the world there is more sea than land. The sea covers three quarters of the earth. The sea is also very deep in some places. It is not deep everywhere, some parts of it are very great. At one spot, near Japan the sea is nearly 11 kilometers deep! Just think of it, the highest mountain in the world is only about 9 kilometers high! If you have swum in the sea, you know that the water is salty. Rivers carry salt from the land into the sea. Some parts of the sea are more salty than other parts. Do you know the Dead Sea in Arabia? It is very salty. Swimmers cannot sink in it! Fish cannot live in the Dead Sea. It is a strange sea. In most parts of the sea, there are a lot of fishes and plants. Some live near the top of the sea. Others live deep down. No sunlight can reach the depth of the sea. So it is completely dark. Strange fishes live there. Some are blind. Some have their own lights. Some have great jaws. With their great jaws, they swallow fish larger than themselves. The sea can be very cold. Deep sea divers know this well. At the top of the water may be warm. Then as the divers go down, the sea becomes colder and colder.
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小題1:. Which of the following statements is NOT true?
A．Land covers one fourth of the area of the earth.
B．The depths of the sea are different in different places.
C．The depth of a sea at one spot near Japan is nearly the height of the highest mountain.
D．The salt in the sea mainly comes from the land.
小題2:.. The Dead Sea is lifeless because ___.
A．the water in it is too coldB．the water in it is too salty for anything to grow
C．the water in it never flowsD．no sunlight can reach the bottom of the lake
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A．uglyB．noisyC．coldD．not calm
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B．Some fish give out light for themselves.
C．Some fish live on other fish.D．All of the above
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A．The necessity of the study of the sea.B．The purpose of man’s further study of the sea.
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科目：高中英語 來源：不詳 題型：閱讀理解

In 1963,former Senator Gaylord Nelson began to worry about our planet (A senator is a person that the people of the United States have chosen to help make the laws.). Senator Nelson knew that our world was getting dirty and that many of our plants and animals were dying .He wondered why most people weren’t trying to solve these problems. He talked to other lawmakers and to the President. They decided that the President would go around the country and tell people about these concerns（關系重大之事）. He did, but still not enough people were working on the problem.
Then, in 1969, Senator Nelson had another idea. He decided to have a special day to teach everyone about the things that needed changing in our environment .He wrote letters to all of the colleges and put a special article in Scholastic Magazine to tell them about the special day he had planned (Most of the schools got this magazine) and he knew that kids would help him.
On April 22,1970, the first Earth Day was held .People all over the country made promises to help the environment. Everyone got involved and since then, Earth Day has spread all over the planet. People all over the world know that there are problems we need to work on and this is our special day to look at the planet and see what needs changing. Isn’t it great? One person had an idea and kept working until everyone began working together to solve it. See what happens when people care about our world?
小題1:The passage mainly talks about _________.
A．the importance of Earth Day
B．the person who planned the Earth Day
C．the history of Earth Day
D．the first Earth Day
小題2:Why did Senator Gaylord Nelson worry about our planet?_________
A．The world was getting dirty.
B．Many plants and animals were dying.
C．Few people cared about the earth.
D．All of the above.
小題3:From the text, we know that _________ helped him most .
A．the president B．the other lawmakers
C．the collegesD．the students
小題4:It took Nelson ______ years to get the people pay much attention to the earth.
A．10B．7C．6D．1

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科目：高中英語 來源：不詳 題型：閱讀理解

Scientists are closely concerned with the structure of buildings and with the quality of building materials． The World health Organization （WHO) observes that the introduction of air conditioning and energy conservation （保護) measures have been accompanied by growing problems of indoor air quality． Some pollutants arise from insulation （隔音) products, some from moving cars, and others from modern housing materials． As many Europeans spend up to 90% of their lives in buildings, the health effects of the indoor climate are very important．
　　Some construction materials, including fiberboard, insulation foams and certain glues for man-made wood floor boards, for example, give out organic products such as formaldehyde （甲醛)． Heat and humidity increase the release of formaldehyde and the gas seriously harms the eyes． Paint, lacquer, etc． can also release dangerous gas into indoor air．
　　Construction materials can cause serious damage, especially when they contain asbestos（石棉）． Asbestos is naturally present in rock formations worldwide． It belongs to a family of mineral substances made up of solid, non-combustible（非易燃品） fiber． These properties make asbestos a highly sought-after construction material． As early as 1931, however, public health officers in the United Kingdom revealed the connection between breathing in asbestos dust and such diseases as lung cancer．
　　The land on which a building is sited may also contribute to pollution． Some kinds of granite or similar rocks contain traces of radium． As it breaks down, this naturally radioactive element produces some kind of radioactive gas that goes through tiny cracks in walls, floors and building materials, and makes its way into the building and the rooms． The better the homes are insulated, the more is the dangerous gas in indoor air． The main effect of this dangerous gas on health is to increase the risk of lung cancer．
小題1:What is the main idea of the passage?
A．Some building materials pollute indoor air．
B．Some factors cause indoor air pollution．
C．Asbestos can cause lung cancer．
D．The land on which houses are built contributes to indoor pollution．
小題2:Why are Europeans particularly concerned with building materials?
A．Lots of building materials there are radioactive．
B．They stay home up to 90% of their lives．
C．They have a high rate of lung cancer．
D．They spend most of their time indoors．
小題3:Why is asbestos a sought-after building material?
A．It is a kind of insulation foam．
B．Asbestos will not give out dangerous gas．
C．This material is not easy to catch fire．
D．It is rarely present in rock formations．
小題4:Why should we be careful about the land on which a building is to be sited?
A．To determine whether the land is firm enough for a building to be sited on．
B．To make sure that the land contains no radioactive material．
C．To make certain that the land releases no formaldehyde or other gases．
D．To check whether it contains any combustible materials．

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