university前用at还是in?IcurrentlyserveasaresearchassistantintheCenterforMathematicsandPhysicsat(in)BeijingUniversity.
2022-02-26 57次 反馈错误 加入收藏 正确率 : 100%
题目内容：
university前用at还是in?
I currently serve as a research assistant in the Center for Mathematics and Physics at(in) Beijing University.
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at
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