以下哪个句子正确?为什么?1.I am an undergraduate student of the Computer
以下哪个句子正确?为什么? 1.I am an undergraduate student of the Computer Science Department in Zhongshan University. 2.I am an undergraduate student of the Computer Science Department at Zhongshan University. 究竟in Zhongshan University对还是at Zhongshan University表达对?