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第 227 頁
Similarly , among college students the use of any illicit drug in the prior year fell from 33 percent to 29 percent between 1990 and 1991 , down from a peak of 56 percent in 1980 . Marijuana is still the most widely used illicit drug .
Similarly , among college students the use of any illicit drug in the prior year fell from 33 percent to 29 percent between 1990 and 1991 , down from a peak of 56 percent in 1980 . Marijuana is still the most widely used illicit drug .
第 383 頁
Nearly 22 million of us ( 9 percent ) report our- selves as being of Hispanic origin , and over 7 million of us ( 2.9 percent ) identify ourselves as Asian - Pacific Islanders . Blacks number 30 million , or 12 percent of the population ...
Nearly 22 million of us ( 9 percent ) report our- selves as being of Hispanic origin , and over 7 million of us ( 2.9 percent ) identify ourselves as Asian - Pacific Islanders . Blacks number 30 million , or 12 percent of the population ...
第 384 頁
About 23 percent of these graduates have gone on to earn a bachelor's degree or higher . Educational attainment has a direct impact on many aspects of life , but most directly on income . The aver- age monthly earnings without a high ...
About 23 percent of these graduates have gone on to earn a bachelor's degree or higher . Educational attainment has a direct impact on many aspects of life , but most directly on income . The aver- age monthly earnings without a high ...
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