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15.公共检索系统OPAC有什么功能？
查询借阅情况、续借、获取图书典藏信息、下载随书光盘、获取购买途径、新书通报、检索期刊、借阅排行等。

15. What are the functions of OPAC?
Query borrowing status, renew borrowing, obtain book collection information, download CDs with books, obtain purchasing channels, new book notifications, search journals, borrowing rankings, etc.