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Let me explain the role of these classes: MySubject class is our main object, Observer1 and Observer2 are objects that depend on MySubject, and Observer1 and Observer2 must change when MySubject changes. The AbstractSubject class defines a list of objects to be monitored, which can be modified: add or delete monitored objects, and when MySubject changes, it is responsible for notifying the objects that exist in the list. Let's look at the implementation code:The series of reports on Interface Hongmao Medicated Liquor is one of the best reports on the incident in the whole industry. It is timely, has core interviews, has great influence, meticulous investigation and comprehensive angle. It has won influence and credibility for the interface.司马先生的实力毋庸置疑，不过我相信老板一定更厉害。It should be Shanghai果然，一个猎户模样的护卫告诉他道：是张家小少爷干的。17. Do some employee surveys regularly, carefully check the voice of employees, stimulate everyone's enthusiasm and reduce work pressure.6.3? SYN cache