1. 正常精子检查报告单_鲤鱼乡校园 寝室_99网站

      How easy is it to group people into “races” based on appearance? What about using individual traits? Does everybody classify the same way?

      Try your hand at "sorting" individuals and see if it matches how people think of themselves. Or explore how we might sort people by physical traits.



      Activities require the Flash 6 plugin.

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