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Although the above code can meet the requirements, it is not easy to expand and difficult to read. If I want one or two conditions in the future, if I want to recharge 300 yuan successfully, I can win the 150 yuan red envelope, then I have to change the code inside at this time, so the coupling between business logic and code is relatively high, and I accidentally correct the wrong code. At this time, we try to use the responsibility chain mode to transfer objects in turn to realize it.Examples are as follows: (Let's give an example of sending emails and short messages)However, using Referer Check to monitor the occurrence of CSRF attacks is a feasible method.Specifically, in 2016, the proportion of product research and development categories such as CAD, CAE, CAM and CAPP in China's industrial software industry is about 8.3%, while the proportion of information management categories such as ERP, CRM and HRM is about 15.5%. Production control categories such as MES, PCS and PLC account for about 13.2%. The remaining 63% are embedded software development.We have to try to replicate the achievements of outstanding people. If you fail, stop to think about why you fail, so as to create an effective psychological representation. This is the core of deliberate practice.Attack speed bonus is the next line of attacks per second in the panel details.⑥ SENTINEL failover