国产av不卡一区二区_欧美xxxx做受欧美_成年人看的毛片_亚洲第一天堂在线观看_亚洲午夜精品久久久中文影院av_8x8ⅹ国产精品一区二区二区_久久精品国产sm调教网站演员_亚洲av综合色区无码一二三区_成人免费激情视频_国产九九九视频

“I can always tell a graduate class from an undergraduate class,” observed the instructor in one of my graduate engineering courses at California State University in Los Angeles.

“When I say ‘Good afternoon,’ the undergraduate respond ‘Good afternoon.’ But the graduate students just write it down.. ”

“研究生班和本科生班很容易就能區別開來?！痹诼迳即壖永＠麃喼萘⒋髮W給我們研究生上工程學課的老師如此說：“我說‘下午好’，本科生們回答說‘下午好’；研究生們則把我說的話記在筆記本上。

（通訊員華東政法學院孫曉琳）