Systematic efforts at national nutrition planning in developing countries go back barely
【M1】
【M1】
A.3000 to 4000 BC
B.1000 to 2000 BC
C.300 to 400 BC
D.4000 to 5000 BC
A widespread myth is that Mexican Americans and Afro-Americans experience discrimination because they often have meager educations and live in ghettos. Even though it is true that many Blacks and Mexican Americans are members of the lower socioeconomic classes, and that all lower-class individuals are treated differently than middle-and upper-class people, it is also true that Blacks and Chicanos with high educations and incomes frequently experience discrimination because of their color. Since American racism is based largely on skin color, no degree of cultural assimilation eliminates it.
Some discussion of forced assimilation and cultural genocide should take place when students study cultural assimilation. Assimilation often occurs when a minority group "voluntarily" acquires the behavior. patterns and lifestyles of dominant group to attain social mobility and occupational success. I use the word voluntarily here somewhat reluctantly because without some degree of cultural assimilation, a group that is very different culturally may not be able to survive in a particular culture. However, in the history of the United States, some forms of cultural assimilation that took place were totally nonvoluntary and might be called forced assimilation because the cultures of certain groups were deliberately destroyed (cultural genocide). These groups were forced to acquire the language, lifestyles, and values of the dominant culture.
Individuals and groups who refused to accept the dominant culture were sometimes the victims of severe punishments, such as death. The cultures of African groups were deliberately destroyed by the slave masters. This cultural destruction began on the slave ships. It seems that systematic and deliberate attempts were made to destroy Indian cultures. These efforts were highly successful since many of the cultural elements of these groups now exist only in the pages of history, and sometimes not even there since they were often destroyed before they could be recorded.
Which of the following is the most possible title for the passage?
A.Cultural Shock.
B.Social Institution.
C.Cultural Assimilation.
D.Forced Assimilation.
Slowing Aging: Way to Fight Diseases in 21st Century
A group of aging experts from the United States and the United Kingdom suggest that the best strategy for preventing and fighting a multitude of diseases is to focus on slowing the biological processes of aging.
"The traditional medical approach of attacking individual diseases—cancer, diabetes, heart disease, Alzheimer's disease(早老性痴呆病) and Parkinson's disease(帕金森氏病)—will soon become less effective if we do not determine how all of these diseases either interact or share common mechanisms with aging", says S. Jay Olshansky, professor of epidemiology at the University of Illinois at Chicago School of Public Health and senior author of the commentary.
Middle-aged and older people are most often impacted by simultaneous but independent medical conditions. A cure for any of the major fatal diseases would have only a marginal impact on life expectancy(预期寿命) and the length of healthy life, Olshansky said. The authors suggest that a new paradigm(模式) of health promotion and disease prevention could produce unprecedented social, economic and health dividends for current and future generations if the aging population is provided with extended years of healthy life.
They note that all living things, including humans, possess biochemical mechanisms that influence how quickly we age and, through dietary(饮食的) intervention or genetic alteration, it is possible to extend lifespan to postpone aging-related processes and diseases.
Further research in laboratory models is expected to provide clues to and deeper understanding of how existing interventions, such as exercise and good nutrition, may lead to lifelong well-being.
The authors also propose greatly increased funding for basic research into the "fundamental cellular(细胞的) and physiological changes that drive aging itself".
"We believe that the potential benefits of slowing aging processes have been underrecognized by most of the scientific community", said Olshansky, "We call on the health-research decision-makers to allocate substantial resources to support and develop practical interventions that slow aging in people".
An increase in age-related diseases and escalating health care costs make this the time for a "systematic attack on aging itself", the authors write.
Olshansky and colleagues contend that modern medicine is already heavily invested in efforts to extend life, and they argue that a fresh emphasis on aging has the potential to improve health and quality of life far more efficiently than is currently possible.
The experts believe the traditional approach of attacking individual diseases______.
A.is the best strategy for fighting diseases.
B.focuses on slowing aging processes.
C.has gone out of date.
D.needs to be improved.
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