It asks home and distance users for validation, such as a library card number or student id before allowing access.
代理掀询问本地或远程用户进行信息确认，比如图书证号或学号，再判断是否允许访问。
It asks home and distance users for validation, such as a library card number or student id before allowing access.
代理掀询问本地或远程用户进行信息确认，比如图书证号或学号，再判断是否允许访问。
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