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【案例分析题】
Anthropology
Anthropology is the study of human beings as creatures of society.It fastens its attention upon those physical characteristics and industrial techniques，those conventions and values，which distinguish one community from all others that belong to a different tradition.
The distinguishing mark of anthropology among the social sciences is that it includes for serious study other societies than our own.For its purposes any social regulation of mating and reproduction is as significant as our own，though it may be that of the Sea Dyaks，and have no possible historical relation to that of our civilization.To the anthropologist，our customs and those of a New Guinea tribe are two possible social schemes for dealing with a common problem，and in so far as he remains an anthropologist he is bound to avoid any weighting of one in favor of the other.He is interested in human behavior，not as it is shaped by one tradition，our own，but as it has been shaped by any tradition whatsoever.He is interested in a wide range of custom that is found in various cultures，and his object is to understand the way in which these cultures change and differentiate，the different forms through which they express themselves and the manner in which the customs of any people function in the lives of the individuals.
Now customs has been commonly regarded as a subject of any great moment.The inner workings of our own brains we feel to be uniquely worthy of investigation，but custom，we have a way of thinking，is behavior.at its most commonplace.As a matter of fact，it is the other way round.Traditional custom is a mass of detailed behavior.more astonishing than what any one person can ever evolve in individual actions.Yet that is a rather trivial aspect of the matter.The fact of first-rate importance is the predominant role that custom plays inexperience and belief，and the very great varieties it may manifest.
According to the passage, we can say that anthropology（）.

A．can reveal an enormous diversity of traditions
B．can deal with human beings as one group of the creatures in the living world
C．can provide insights into the relationship between human beings and nature
D．can distinguish the human race from other creatures

单项选择题

【案例分析题】Sleep For millions of years before the appearance of the electric light，shift work，all-night cable TV and the Internet，Earth’s creatures evolved on a planet with predictable and reassuring 24-hour rhythms.Our biological clocks are set for this daily cycle.Simply put，our bodies want to sleep at night and be awake during the day.Most women and men need between eight and eight and a halfhours of sleep a night to function properly throughout their lives.（Contrary to popular belief，humans don’t need less sleep as they age.） But in average，Americans sleep only about seven and a half hours per night，a marked drop from the nine hours they averaged in 1910.What’s worse，nearly one third of all Americans get less than six hours of sleep on a typical work night.For most people，that’s not nearly enough. Finding ways to get more and better sleep can be a challenge.Scientists have identified more than 80different sleep disorders.Some sleeping disorders are genetic.But many problems are caused by staying up late and sleeping in，by traveling frequently between time zones or by working nights.Dr.James F.Jones at National Jewish Medical and Research Center in Denver says that sleep disorders are often diagnosed as other discomforts.About one third of the patients referred to him with possible chronic fatigue syndrome actually have treatable sleep disorders.’Before we do anything else，we look at their sleep，’Jones says. Sleep experts say that most people would benefit from a good look at their sleep patterns.’My motto （座右铭）is ’Sleep defensively’，’says Mary Carskadon of Brown University.She says people need to carve out sufficient time to sleep，even if it means giving up other things.Sleep routines—like going to bed and getting up at the same time every day—are important.Pre-bedtime activities also make a difference.As with Elaner，who used to suffer from sleeplessness，a few lifestyle.changes—avoiding stimulants and late meals，exercising hours before bedtime，relaxing with a hot bath—yield better sleep.
What is TRUE of human sleep? （）.

A．Most people need less sleep when they grow older.
B．Most people need seven and a half hours of sleep every night.
C．On average, people in the U. S today sleep less per night than they used to.
D．For most people, less than six hours of sleep on a typical work night is enough.