简介:摘要本文对PLC课程中基本指令的教学进行探讨,从基础课程及相关知识、基本指令入门关键知识点、基本指令学习的经验、PLC实训等方面介绍了自己的几点体会。
简介:""Mensaytheyhatetoshop,""saysZhukin,CityUniversityofNewYorkSociology(社会学)professor.""Yetwhenyouaskthemdeeperquestions,itturnsoutthattheyliketoshop.Mengenerallyliketoshopforbooks,musicandhardware.Butifyouaskthemabouttheshoppingtheydoforbooksormusic,they'llsay,'Well,that'snotshopping.That'sresearch.'""