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!!!解説

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According to a Pew Research survey, 73% of adults online use some kind of social networking platform, and 42% use multiple platforms.
出典: Based on an article in the Journal of Individual Psychology
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It's hard to overstate te importance of cotton in shaping the modern era.
出典:
{{amazon 0465097405}}


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The study of animal behavior is among the oldest of human endeavors.
出典: 
{{amazon 0393353664}}

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!!!参考
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