CASE has about three hundred places. We're as near given that the phone in your pocket, ready to deliver the can-do-now reaction you have to get. 这里多说一句，苹果其实强调过，一些application在后台不老实，是会被强杀的。其实很多人遇到的杀后台严重问题，很多时候都是因为在使用流氓application啊！还有更重要的信息，那就是任何时候都没必要主动关闭application，这只会导致后续启动application更慢... https://casestudysolution53708.prublogger.com/34918908/case-study-providers-for-dummies