通过二维码检查作业

摘要：

Mr.Guo is a teacher from Xi”an.He asked his students to hand in their homework through a QR code.”We spent an hour or two in class learning how to generate (使产生) the codes,and in the end everything gets easier.”said Guo,”When students finish the homework,they keep it on WeChat(微信).Then,each student makes his own QR code and gives it to me.So I can check their work everywhere by using my computer or telephone.”

在线出版日期：2018-12-21（万方平台首次上网日期，不代表论文的发表时间）

页数：共3页

页码：30-31,63