问题描述：
A new study has found evidence of aggressive behavior in children who ...
A new study has found evidence of aggressive
behavior in children who drink four or more servings of soft drinks every day.
分析下语法结构,还有为什么用介词in?
A new study has found evidence of aggressive
behavior in children who drink four or more servings of soft drinks every day.
分析下语法结构,还有为什么用介词in?
问题解答：
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