题目内容
A class system is a rigid form of social stratification in which the position a person has by birth cannot be changed through his/her own achievements or luck.
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A caste system is a closed system of stratification in which social position is determined by the family into which the person is born.
The term social strata refers to the extent to which individuals can move out of the strata into which they were born.
In countries where the value of group identification is considered to be primary, managers and workers are discouraged from moving from company to company.
万维网 WWW (World Wide Web) 是一种特殊的计算机网络。
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