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1. A new concept mapping function has been added. Concept mapping helps organize and build knowledge by depicting topic associations.1. State patterns define the relationship between state and behavior and encapsulate them in a class. By adding new state classes, it is easy to add new states and transitionsFor event handler registration, see the section How to Register Event Handlers.3. Encourage consumers to create an account. This step is usually set in the checkout process of consumers. If you can provide consumers with additional services and functions in a non-invasive way to encourage them to register as your members, it will help build your customer trust and obtain more repeat purchases for your products. Encouraging users to register with incentive programs is very popular with consumers. As shown in the following figure, Hallmark Card Company encourages consumers to register as its users by offering prizes and future consumption discounts. In addition, sellers can also use this policy to collect visitor e-mail addresses.板栗一把攥住他胳膊，附耳提醒道：万不可冲动。The humanoid monster in the former is relatively slow, But the ability to fight is very strong, Not sensitive to puncture attacks, Can resist medium caliber and medium power rifle bullets, In the face of fire, Only when they are completely smashed or their heads are cut off can they be killed. The latter, an unknown creature similar to a "dog", The target is small, Fast speed and evasive ability, After listening to Liu Guangyuan's description, After it can easily cross a large crater with a diameter of 5-6 meters, the impact speed is not weakened, so it can be seen that the unknown creature has extremely strong explosive force, rapid movement, and strong adaptability to complex terrain, but its defense force is poor, and it will die after being hit more times by weaker casualties (such as high-speed steel balls in anti-infantry mines).