【简答题】People tend to become more personal and hide less of themselves when using email . Researchers from Open University in Britain have found in a recent study that there are good reasons for this . The t...
【简答题】Mr Guo is a teacher from Xi’an. He asked his students to hand in their homework through a QR code ( 二维码 ). “We spent an hour or two in class learning how to generate ( 使产生 ) the codes, and in the end ...