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Absorption of free radicals: Flame retardants act as transfer bodies of free radicals to inactivate them and prevent the reaction of free radicals.Public delegate void DoSth (object sender, EventArgs e);HTTP requests typically have two characteristics: the IP address and the User Agent field. For example, malicious requests are all sent from an IP segment, so just seal the IP segment. Alternatively, their User Agent field has a feature (containing a specific word), then intercept the request with that word.Explain the template method mode, which means: in an abstract class, there is a main method, and then define 1... n methods, which can be abstract or actual methods, define a class, inherit the abstract class, override the abstract method, and realize the call to subclasses by calling the abstract class. First look at a diagram:Link to this article: Scratch2.0 Programming Tutorial Section 6: Event ModuleDark Elves: Luxe, Clent, Kakun, Saran, Maya, Sharplon, Morgan of Resentment