The gray-haired lady can"t wait to leave the building to search for her dad.Unless watched, she will
walk in the streets in an effort to find her father,who died 30years ago.
Not all cases of Alzheimer"s disease look like this,but Alzheimer"s is a serious disease that is said to be
the fourth or fifth leading cause of death for people over age 75.
It is said that about three percent of the U.S. population over age 65 have Alzheimer"s.In the early stages,
people may exhibit short term memory loss. Some may experience changes in personality, easy to be angry.
As the disease progresses, patients might lose the ability to move and may be unable to speak or move at all.
This progressive disease generally lasts 8 to 10 years before death occurs.
While no one is certain what causes these changes in the brain"s nerve fibers (神经纤维), their effect is
certain. Alzheimer"s destroys not only the patients, but also spouses (配偶), friends and families.
What should you do if you notice progressive memory loss in yourself or a loved one? Have the person
examined by a doctor who is a specialist in the treatment of Alzheimer"s disease. Though many reasons other
than Alzheimer"s disease may cause memory loss,its early diagnosis (诊断) and treatment may delay some of
the most serious effects.
What feeling will you likely experience should a loved one suffer from Alzheimer"s disease? A person will
often go through the various stages of sadness, shock, anger, and so on. If the spouse develops the disease,
you may experience hurt and disappointment when he or she doesn"t remember you are married.
Life for the Alzheimer"s patients and their loved ones will never be the same as the disease progresses,
bringing a deep sorrow, loss and even anger towards God. No matter what feelings are present, facing them
honestly will serve one better than burying them.
B. She was sad about the death of her father.
C. She can"t search for her father without being watched.
D. She suffers from Alzheimer"s disease.
B. their families and friends will experience mental sufferings
C. they will certainly die in 8 to 10 years
D. they will forget everybody but their spouses
B. from sadness,shock,anger,and so on
C. for a number of reasons
D. with changes in personality
B. it is still unknown what causes the changes in the brain"s nerve fibers
C. nerve fibers in the brain will cause Alzheimer"s disease
D. when one suffers from Alzheimer"s disease,he will be buried
Location
The University is in Princeton, New Jersey. It is an hour"s train ride south of New York City and an
hour"s train ride north of Philadelphia.
Students
There are 4,600 undergraduates (本科生). There are also 1,900 graduate students, but Princeton is
unusual among universities in having a student body made up largely of undergraduates.
Faculty
Princeton has about 700 full-time faculty members (教员). There are another 300 or so part-time and
visiting faculty. All faculty members at Princeton are expected to teach and research.
Degrees
Princeton offers two undergraduate degrees: the bachelor (学士) of arts (A.B.) degree and the bachelor
of science in engineering (B.S.E.) degree.
Academic Year
An academic year runs from September to late May and lasts two terms (fall and spring). A normal
course load is four or five courses per term, although many students take extra courses.
Residences
Princeton provides housing for all undergraduate students. Freshmen and second-year students are required
to spend their first two years in one of five colleges. Each college has its own dining hall, common rooms
and computer centers.
Fees and Expenses (Academic Year 2004-2005)
Tuition (学费): $29,910
Room and board: $ 8,387
Other expenses (books, telephone, etc.): $ 3,083
Total: $ 41,380
B. Two.
C. Three.
D. Four.
tuition.
B. $ 52,850
C. $11,470
D. $ 8, 387
B. Its students are mainly undergraduates.
C. It provides housing for all undergraduate students.
D. All the faculty members at Princeton are expected to teach and research.
B. An academic year lasts about nine months in Princeton University.
C. Undergraduates should spend their first two years in one of five colleges.
D. It"s about an hour"s train ride from Princeton University to the north of New York City.
enable humans to last tens of years beyond what is now seen as the natural limit of the human life span.
"I think we are knocking at the door of immortality (永生)," said Michael Zey, a Montclair State University
business professor and author of two books on the future. "I think by 2075 we will see it and that"s a
conservative estimate (保守的估计)."
At the conference in San Francisco, Donald Louria, a professor at New Jersey Medical School in Newark
said advances in using genes as well as nanotechnology (纳米技术) make it likely that humans will live in the
future beyond what has been possible in the past. "There is a great push so that people can live from I20 to
180 years," he said. "Some have suggested that there is no limit and that people could live to 200 or 300 or
500 years."
However, many scientists who specialize in ageing are doubtful about it and say the human body is just not
designed to last past about 120 years. Even with healthier lifestyles and less disease, they say failure of the
brain and organs will finally lead all humans to death.
Scientists also differ on what kind of life the super aged might live."It remains to be seen if you pass 120,
you know; could you be healthy enough to have good quality of life?" said Leonard Poon, director of the
University of Georgia Gerontology Centre. "At present people who could get to that point are not in good health
at all."
B. they are sure to find the truth about long living
C. they have got some ideas about living forever
D. they are able to make people live past the present life span
B. it is still doubtful how long humans can live
C. the human body is designed to last past about 120 years
D. it is possible for humans to live longer in the future
B. the idea of living beyond the present life span
C. the idea of living from 200 to 300 years
D. the conservative estimate
B. Science, Technology and Long Living
C. No Limit for Human Life
D. Healthy Lifestyle and Long Living
shopping-it may not mean you are getting old. It could be Alzheimer"s disease. So it"s important to see
a doctor as soon as you can.
There is no cure for Alzheimer"s. But a drug called ARICEPT has been used by millions of people
to help their symptoms (症状).
In studies, ARICEPT has been proved to work for Alzheimer"s. It has helped people improve their
memory over time. It has also helped them to keep doing everyday things on their own.
Ask your doctor if ARICEPT is right for you or your loved one. It is the Number One drug for
Alzheimer"s in the world. The sooner you know it"s Alzheimer"s, the better ARICEPT can help.
ARICEPT is good for many but may not be good for everyone. Some people may experience not
sleeping well, feeling very tired, or not wanting to eat. In studies, these side effects weren"t serious at
all and went away over time. Some people taking ARICEPT may feel light-headed. In this case you
should tell your doctors because your condition may get worse.
B. he can"t do everyday things on his own
C. he often forgets things because he is old
D. he can"t move about
B. A medicine to delay signs of aging.
C. A medicine to reduce the symptoms of Alzheimer"s.
D. A medicine to cure brain damage.
B. feels tired out
C. has no desire to eat
D. feels like a drunken man
will miss our planet, but two pieces will probably hit the southern half of the Earth.
On 17 July, a piece four kilometers wide enters the Earth"s atmosphere (大气层) with a massive explosion.
About half of the piece is destroyed, but the remaining part hits the South Atlantic at 200 times the speed of
sound. The sea boils and a huge hole is made in the sea bed. Huge waves are created and spread outwards
from the hole. The wall of water, a kilometer high, rushes towards southern Africa at 800 kilometers an hour.
Cities on the African coast are totally destroyed and millions of people re drowned.
Before the waves reach South America, the second piece of the comet lands in Argentina. Earthquakes and
volcanoes are set off in the Andes Mountains. The shock waves move north into California and all around the
Pacific Ocean. The cities of Los Angeles, San Francisco and Tokyo are completely destroyed by earthquakes.
Millions of people in the southern half of the earth are already dead, but the north won"t escape for long.
Because of the explosions, the sun is hidden by clouds of dust, temperatures around the world fall to almost
zero.Crops are ruined. The sun won"t be seen again for many years. Wars break out as countries fight for
food. A year later, no more than 10 million people remain alive.
Could it really happen? In fact, it has already happened more than once in the history of the Earth. The
dinosaurs were on the Earth for over 160 million years. Then 65 million years ago they suddenly disappeared.
Many scientists believe that the Earth was hit by a piece of object in space. The dinosaurs couldn"t live through
the cold climate that followed and they died out. Will we meet the same and?
B. An event of imagination
C. A research on space.
D. A scientific adventure.
B. damages to cities
C. an Earth explosion
D. huge waves
B. Because the light and heat from the sun can not reach the earth.
C. Because people there can not live at the temperature of zero.
D. Because wars break out among countries.
B. what happened 65 million years ago was an invented story
C. the human beings will die out in 2094
D. the Earth could be hit by other objects in space
time. Ten inches of rain may be enough for many plants to survive (存活) if the rain is spread throughout
the year, If it falls, within one or two months and the rest of the year is dry, those plants may die and a
desert may form.
Sand begins as tiny pieces of rock that get smaller and smaller as wind and weather wear them down.
Sand dunes (沙丘) are formed as winds move the sand across the desert. Bit by bit, the dunes grow over
the years, always moving with the winds and changing the shape. Most of them are only a few feet tall,
but they can grow to be several hundred feet high.
There is, however, much more to a desert than sand. In the deserts of the southwestern United States,
cliffs (悬崖) and deep valleys were formed from thick mud that once lay beneath a sea more than millions
of years ago. Over the centuries, the water dried up. Wind, sand, rain, heat and cold all wore away at the
remaining rocks. The faces of the desert mountains are always changing-very, very slowly-as these forces
of nature continue to work on the rock.
Most deserts have a surprising variety of life. There are plants, animals and insects that:have adapted to
life in the desert. During the heat of the day, a visitor may see very few signs of living things, but as the air
begins to cool in the evening, the desert comes to life. As the sun begins to rise again in the sky, the desert
once again becomes quiet and lonely.
B. the rain falls only in a few weeks
C. there is little rain in a year
D. it is dry all the year round
A. sand piles up gradually
B. there is plenty of rain in a year
C. the sea has dried up over the years
D. pieces of rock get smaller
A. too much sand
B. more sand than before
C. nothing except sand
D. something else besides sand
B. life exists in rough conditions
C. all sand dunes are a few feet high
D. rocks are worn away only by wind and heat
- 1已知椭圆的两个焦点为F1,F2,P为椭圆上一点,且∠F1PF2=60°,则|PF1|·|PF2|的值为
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