Researchers have established that when
people are mentally engaged, biochemical changes occur in the brain that allow
it to act more effectively in cognitive areas such as attention and memory. This
is true regardless of age. People will be alert and receptive if
they are faced with information that gets them to think about things they are
interested in. And someone with a history of doing more rather than less will go
into old age more cognitively sound than someone who has not had an active
mind. Many expert are so convinced of the benefits of
challenging the brain that they are putting the theory to work in their own
lives." The idea is no necessarily to learn to memorize enormous amounts of
information," says James Fozard, associate director of the National Institute on
Aging. "Most of us don A. keep fit by going in for physical activities B. keep mentally active by challenging their brains C. maintain mental alertness through specific training D. maintain a balance between individual and group activities
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[单项选择] {{B}}TEXT E{{/B}}
Researchers have established that when
people are mentally engaged, biochemical changes occur in the brain that allow
it to act more effectively in cognitive areas such as attention and memory. This
is true regardless of age. People will be alert and receptive if
they are faced with information that gets them to think about things they are
interested in. And someone with a history of doing more rather than less will go
into old age more cognitively sound than someone who has not had an active
mind. Many expert are so convinced of the benefits of
challenging the brain that they are putting the theory to work in their own
lives." The idea is no necessarily to learn to memorize enormous amounts of
information," says James Fozard, associate director of the National Institute on
Aging. "Most of us don A. who can remember large amounts of information B. who are highly intelligent C. whose minds are alert and receptive D. who are good at recognizing different sounds
[单项选择] {{B}}TEXT E{{/B}} Researchers have
established that when people are mentally engaged, biochemical changes occur in
the brain that allow it to act more effectively in cognitive areas such as
attention and memory. This is true regardless of age.
People will be alert and receptive if they are faced with information that
gets them to think about things they are interested in. And someone with a
history of doing more rather than less will go into old age more cognitively
sound than someone who has not had an active mind. Many
expert are so convinced of the benefits of challenging the brain that they are
putting the theory to work in their own lives." The idea is no necessarily to
learn to memorize enormous amounts of information," says James Fozard, associate
director of the National Institute on Aging." Most of us don’ t need that kind
of skill. Such specific training is of less interest than being able to maintain
me A. who can remember large amounts of information B. who are highly intelligent C. whose minds are alert and receptive D. who are good at recognizing different sounds
[单项选择] Text 1
British cancer researchers have found
that childhood leukaemia is caused by an infection, and clusters of cases around
industrial sites are the result of population mixing that increases exposure.
The research published in the British Journal of Cancer backs up a 1988 theory
that some as-yet unidentified infection caused leukaemia—not the environmental
factors widely blamed for the disease. "Childhood leukaemia
appears to be an unusual result of a common infection," said Sir Richard Doll,
an internationally-known cancer expert who first linked tobacco with lung cancer
in 1950. "A, virus is the most likely explanation. You would get an increased
risk of it if you suddenly put a lot of people from large towns in a rural area,
where you might have people who had not been exposed to the infection. "Doll was
commenting on the new fi A. Leo Kinlen. B. Richard Doll. C. Louise Parker. D. Heather Dickinson.
[单项选择]{{B}}Text 3{{/B}}
Researchers have found that prenatal
factors and childhood experiences, including birth weight, diet and exercise
patterns, might affect a woman’s risk of developing breast cancer.
Evidence is accumulating, though the research is still in its very early
phases, that the periods before and soon after birth, childhood and early
adolescence are much more important to breast cancer risk than had been
appreciated. Just as heart disease has its origins in childhood, breast cancer
is not just an adult disease. For example, there is a strong link between
high-fat diets in the population and high rates of breast cancer, but at best a
weak relationship to the amount of fat an individual woman consumes as an adult.
But the effects of fat in a child’ s diet may explain why Japanese women who
emigrate to the United States maintain their l A. because of Americans’ diet, people there, including immigrants, have a high risk of breast cancer. B. an adult woman’ s intake of high-fat diets has little to do with her risk of breast cancer. C. American white women have a higher risk of breast cancer than women with darker skins. D. Asian immigrants’ daughters and granddaughters brought up in the U.S. have a higher risk of breast cancer than their mothers and grandmothers.
[单项选择] {{B}}TEXT D{{/B}} Researchers have
established that when people are mentally engaged, biochemical changes occur in
the brain that allow it to act more effectively areas such as attention and
memory. This is true regardless of age. People will be alert and
receptive if they are faced with information that gets them to think about
things they are interested in. And someone with a history of doing more rather
than less will go into old age more cognitively sound than someone who has not
had an active mind. Many experts are so convinced of the
benefits of challenging the brain that they are putting the theory to work in
their own lives." The idea is not necessarily to learn to memorize enormous
amounts of information," says James Fazard, associate director of the National
Institute on Aging." Most of us don’t need that kind of skill. Such specific
training is of less interest than being able to maintain mental alertness."
A. whose minds are alert and receptive B. who are highly intelligent C. who can remember large amounts of information D. who are good at recognizing different sounds
[单项选择] {{B}}TEXT B{{/B}}
Researchers investigating brain size
and mental ability say their work offers evidence that education protects the
mind from the brain’s physical deterioration. It is known that
the brain shrinks as the body ages, but the effects on mental ability are
different from person to person. Interestingly, in a study of elderly men and
women, those who had more education actually had more brain shrinkage.
"That may seem like bad news," said study author Dr. Edward Coffey, a
professor of psychiatry and of neurology at Henry Ford Health System in Detroit.
However, he explained, the finding suggests that education allows people to
withstand more brain-tissue loss before their mental functioning begins to break
down. The study, published in the July issue of Neurology, is
the first to provide biologica A. enhance mental development B. protect the brain from mental decline C. prevent the brain from shrinking D. compensate for brain shrinkage
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